WO2012097682A1 - Bicyclic inhibitors of alk - Google Patents

Bicyclic inhibitors of alk Download PDF

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Publication number
WO2012097682A1
WO2012097682A1 PCT/CN2012/000101 CN2012000101W WO2012097682A1 WO 2012097682 A1 WO2012097682 A1 WO 2012097682A1 CN 2012000101 W CN2012000101 W CN 2012000101W WO 2012097682 A1 WO2012097682 A1 WO 2012097682A1
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WO
WIPO (PCT)
Prior art keywords
amino
pyridazin
pyrido
phenyl
alkyl
Prior art date
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PCT/CN2012/000101
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French (fr)
Inventor
Anil Vasudevan
Thomas Dale Penning
Huanming Chen
Bo Liang
Shaohui Wang
Zhongqiang ZHAO
Dikun CHAI
Leifu YANG
Yingxiang GAO
Original Assignee
Abbott Laboratories
Abbott Laboratories Trading (Shanghai) Company, Ltd.
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Application filed by Abbott Laboratories, Abbott Laboratories Trading (Shanghai) Company, Ltd. filed Critical Abbott Laboratories
Priority to CN201280013761XA priority Critical patent/CN103415516A/en
Priority to JP2013549701A priority patent/JP2014502975A/en
Priority to EP12736305.9A priority patent/EP2665724A4/en
Priority to US13/979,389 priority patent/US20140155389A1/en
Priority to CA2824871A priority patent/CA2824871A1/en
Publication of WO2012097682A1 publication Critical patent/WO2012097682A1/en

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
    • C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
    • C07D471/04—Ortho-condensed systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
    • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links

Definitions

  • This invention pertains to compounds which inhibit the activity of anaphastic lymphoma kinase (ALK), methods of making the compounds, compositions containing the compounds, and methods of treatment using the compounds.
  • ALK anaphastic lymphoma kinase
  • RTKs receptor tyrosine kinases
  • ALK Anaplastic Lymphoma Kinase
  • ACL anaplastic large cell lymphoma
  • the protein product of this translocation is ALK fused to nucleophosmin (NPM) (Morris et al.. 1994).
  • NPM nucleophosmin
  • the dimerization domain of NPM results in constitutive dimerization and activation of ALK (reviewed in Chiarle, R., Nature reviews, 8: 1 1 -23 (2008)).
  • ALK recruits several adaptor proteins and stimulates multiple signaling pathways known to mediate tumor cell growth and survival including STAT3, PLC- ⁇ , RAS-ERK1.2, and PI3K-AKT (Bai, R.Y.. et al. Molecular and cellular biology 18: 695 1 -6961 ( 1998); Bai, R.Y.. et al.
  • NPM-ALK drives tumor formation, proliferation and survival in ALCL (reviewed in ( Duyster, J., et al. Oncogene 20: 5623-5637 (2001 )).
  • NSCLC non-small cell lung cancers
  • NSCLC tumors harboring ALK translocations are mutually exclusive from K-Ras or EGFR aberrations and predominantly occur in younger patients that are non-smokers (Rodig et al., Clin Cancer Res 15 : 5216-5223 (2009); Shaw et al., J Clin Oncol 27: 4247-4253 (2009); Wong et al., Cancer 1 15: 1723-1733 (2009)).
  • activating point mutations and amplifications have been reported in a subset of sporadic and familial neuroblastomas, further expanding the spectrum of tumors dependent on ALK activity (Chen et al..
  • Neuroblastomas with ALK genetic aberrations also are dependent on ALK for proliferation and survival, and cells expressing ALK containing activating mutations form tumors in animal models.
  • Inhibitors of RTKs have the potential to cause lethality in cancerous cells that are reliant on deregulated RTK activity while sparing normal tissues.
  • small molecule inhibitors of ALK would be beneficial for therapeutic intervention in ALCL, NSCLC, neuroblastoma, and other cancers that are dependent on ALK for growth and survival.
  • R 1 , n, X, Y, Z, A, B, and G 1 are as defined below and subsets therein.
  • compositions comprising a therapeutically effective amount of a compound of formula (I) and a pharmaceutically acceptable salt in combination with a pharmaceutically suitable carrier.
  • One embodiment is directed to a method of treating cancer in a mammal comprising administering thereto a therapeutically acceptable amount of a compound or pharmaceutically acceptable salt of formula (I).
  • Another embodiment pertains to a method of decreasing tumor volume in a mammal comprising administering thereto a therapeutically acceptable amount of a compound or pharmaceutically acceptable salt of formula (I).
  • alkyl (alone or in combination with another term(s)) means a straight-or branched-chain saturated hydrocarbyl substituent typically containing from 1 to about 10 carbon atoms; or in another embodiment, from 1 to about 8 carbon atoms; in another embodiment, from 1 to about 6 carbon atoms, and in another embodiment, from 1 to about 4 carbon atoms.
  • substituents include methyl, ethyl, n-propyl, isopropy l. n- butyl, isobutyl, sec-butyl, tert-butyl, pentyl. iso-amyl. and hexy l and the like.
  • alkenyl (alone or in combination with another term(s)) means a straight- or branched-chain hydrocarbyl substituent containing one or more double bonds and typically from 2 to about 10 carbon atoms; or in another embodiment, from 2 to about 8 carbon atoms; in another embodiment, from 2 to about 6 carbon atoms; and in another embodiment, from 2 to about 4 carbon atoms.
  • substituents include ethenyl (vinyl), 2-propenyl, 3-propenyl, 1,4-pentadienyl, 1,4-butadienyl, 1-butenyl, 2-butenyl, and 3-butenyl and the like.
  • alkynyl (alone or in combination with another term(s)) means a straight- or branched-chain hydrocarbyl substituent containing one or more triple bonds and typically from 2 to about 10 carbon atoms; or in another embodiment, from 2 to about 8 carbon atoms, in another embodiment, from 2 to about 6 carbon atoms: and in another embodiment, from 2 to about 4 carbon atoms.
  • substituents include ethynyl, 2-propynyI. 3- propynyl, 2-butynyl, and 3-butynyl and the like.
  • carbocyclyl (alone or in combination with another term(s)) means a saturated cyclic (i.e., “cycloalkyl"), partially saturated cyclic (i.e., “cycloalkenyl”), or completely unsaturated (i.e., "aryl”) hydrocarbyl substituent containing from 3 to 14 carbon ring atoms ("ring atoms” are the atoms bound together to form the ring or rings of a cyclic substituent).
  • a carbocyclyl may be a single-ring (monocyclic) or polycyclic ring structure.
  • a carbocyclyl may be a single ring structure, which typically contains from 3 to 8 ring atoms, more typically from 3 to 6 ring atoms, and even more typically 5 to 6 ring atoms.
  • Examples of such single-ring carbocyclyls include cyclopropyl (cyclopropanyl), cyclobutyl (cyclobutanyl), cyclopentyl (cyclopentanyl), cyclopentenyl, cyclopentadienyl, cyclohexyl (cyclohexanyl), cyclohexenyl, cyclohexadienyl, and phenyl.
  • a carbocyclyl may alternatively be polycyclic (i.e., may contain more than one ring).
  • polycyclic carbocyclyls include bridged, fused, and spirocyclic carbocyclyls.
  • a spirocyclic carbocyclyl one atom is common to two different rings.
  • An example of a spirocyclic carbocyclyl is spiropentanyl.
  • a bridged carbocyclyl the rings share at least two common non-adjacent atoms.
  • bridged carbocyclyls include bicyclo[2.2.1 ]heptanyl, bicyclo[2.2.1 ]hept-2-enyl, and adamantanyl.
  • two or more rings may be fused together, such that two rings share one common bond.
  • Examples of two- or three-fused ring carbocyclyls include naphthalenyl, tetrahydronaphthalenyl (tetralinyl), indenyl, indanyl (dihydroindenyl), anthracenyl, phenanthrenyl, and decalinyl.
  • cycloalkyi (alone or in combination with another term(s)) means a saturated cyclic hydrocarbyl substituent containing from 3 to 14 carbon ring atoms.
  • a cycloalkyi may be a single carbon ring, which typically contains from 3 to 8 carbon ring atoms and more typically from 3 to 6 ring atoms.
  • single-ring cycloalky ls include cyclopropyl, cyclobutyl, cyclopentyl, and cyclohexyl.
  • a cycloalkyi may alternatively be polycyclic or contain more than one ring. Examples of polycyclic cycloalkyls include bridged, fused, and spirocyclic carbocyclyls.
  • aryl (alone or in combination with another term(s)) means an aromatic carbocyclyl containing from 6 to 14 carbon ring atoms.
  • An aryl may be monocyclic or polycyclic (i.e., may contain more than one ring). In the case of polycyclic aromatic rings, only one ring the polycyclic system is required to be unsaturated while the remaining ring(s) may be saturated, partially saturated or unsaturated.
  • aryls include phenyl, naphthalenyl, indenyl, indanyl, and tetrahydronapthyl.
  • the number of carbon atoms in a hydrocarb l substituent is indicated by the prefix “C x -C y -", wherein x is the minimum and y is the maximum number of carbon atoms in the substituent.
  • C x -C y - refers to an alkyl substituent containing from 1 to 6 carbon atoms.
  • C3-Crcycloalkyl means a saturated hydrocarbyl ring containing from 3 to 8 carbon ring atoms.
  • hydrogen (alone or in combination with another term(s)) means a hydrogen radical, and may be depicted as -H.
  • hydroxy (alone or in combination with another term(s)) means -OH.
  • amino (alone or in combination with another term(s)) means -NH 2 .
  • halogen or "halo" (alone or in combination with another term(s)) means a fluorine radical (which may be depicted as -F), chlorine radical (which may be depicted as - CI), bromine radical (which may be depicted as -Br), or iodine radical (which may be depicted as -I).
  • a non-hydrogen radical is in the place of hydrogen radical on a carbon or nitrogen of the substituent.
  • a substituted alkyl substituent is an alkyl substituent in which at least one non-hydrogen radical is in the place of a hydrogen radical on the alkyl substituent.
  • monofluoroalkyi is alkyl substituted with a fluoro radical
  • difluoroalkyl is alkyl substituted with two fluoro radicals. It should be recognized that if there are more than one substitution on a substituent, each non-hydrogen radical may be identical or different (unless otherwise stated).
  • substituent may be either (1) not substituted or (2) substituted. If a substituent is described as being optionally substituted with up to a particular number of non-hydrogen radicals, that substituent may be either (1) not substituted; or (2) substituted by up to that particular number of non-hydrogen radicals or by up to the maximum number of substitutable positions on the substituent, whichever is less. Thus, for example, if a substituent is described as a heteroaryl optionally substituted with up to 3 non-hydrogen radicals, then any heteroaryl with less than 3
  • substitutable positions would be optionally substituted by up to only as many non-hydrogen radicals as the heteroaryl has substitutable positions.
  • tetrazolyl (which has only one substitutable position) would be optionally substituted with up to one non-hydrogen radical.
  • an amino nitrogen is described as being optionally substituted with up to 2 non-hydrogen radicals, then a primary amino nitrogen will be optionally substituted with up to 2 non-hydrogen radicals, whereas a secondary amino nitrogen will be optionally substituted with up to only 1 non-hydrogen radical.
  • haloalkyl means an alkyl substituent in which at least one hydrogen radical is replaced with a halogen radical.
  • haloalkyls include chloromethyl, 1 -bromoethyl, fluoromethyl, difluoromethyl, trifluoromethyl, and 1 , 1 , 1-trifluoroethyl. It should be recognized that if a substituent is substituted by more than one halogen radical, those halogen radicals may be identical or different (unless otherwise stated).
  • the prefix "perhalo" indicates that every hydrogen radical on the substituent to which the prefix is attached is replaced with independently selected halogen radicals, i.e., each hydrogen radical on the substituent is replaced with a halogen radical. If all the halogen radicals are identical, the prefix typically will identify the halogen radical. Thus, for example, the term “perfluoro” means that every hydrogen radical on the substituent to which the prefix is attached is substituted with a fluorine radical. To illustrate, the term
  • perfluoroalkyl means an alkyl substituent wherein a fluorine radical is in the place of each hydrogen radical.
  • carbonyl (alone or in combination with another term(s)) means -C(O)-.
  • aminocarbonyl (alone or in combination with another term(s)) means - C(0)-NH 2 .
  • oxy (alone or in combination with another term(s)) means an ether substituent, and may be depicted as -0-.
  • alk lhydroxy (alone or in combination with another term(s)) means - alkyl-OH.
  • alkylamino (alone or in combination with another term(s)) means -alkyl- NH 2 .
  • alkyloxy (alone or in combination with another term(s)) means an alkylether substituent, i.e., -O-alkyl.
  • alkylether substituent i.e., -O-alkyl.
  • substituents include methoxy (-0- CH 3 ), ethoxy, n-propoxy, isopropoxy. n-butoxy. iso-butoxy, sec-butoxy, and tert-butoxy.
  • alkylcarbonyl (alone or in combination with another term(s)) means - C(0)-alkyl.
  • aminoalkylcarbonyl (alone or in combination with another term(s)) means -C(0)-alkyl-NH 2 .
  • alkyloxycarbonyl (alone or in combination with another term(s)) means - C(0)-0-alky l.
  • heterocyclylcarbonyl (alone or in combination with another term(s)) means -C(0)-heterocyclyl.
  • carbocyclylalkylcarbonyl (alone or in combination with another term(s)) means -C(0)-alkyl-carbocyclyl.
  • heterocyclylalkylcarbonyl (alone or in combination with another term(s)) means -C(0)-alkyl-heterocyclyl.
  • carbocyclylo ycarbom 1 (alone or in combination w ith another term(s)) means -C(0)-0-carbocyclyl.
  • carbocyclylall y loxycarbonyl (alone or in combination with another term(s)) means -C(0)-0-alkyl-carbocyclyl.
  • thio or "thia” (alone or in combination with another term(s)) means a thiaether substituent, i.e., an ether substituent wherein a divalent sulfur atom is in the place of the ether oxygen atom. Such a substituent may be depicted as -S-.
  • alky 1- thio-alkyl means alkyl-S-alkyl (alkyl-sulfanyl-alkyl).
  • thiol or "sulfhydryl” (alone or in combination with another term(s)) means a sulfhydryl substituent, and may be depicted as -SH.
  • (thiocarbonyl) (alone or in combination with another term(s)) means a carbonyl wherein the oxygen atom has been replaced with a sulfur. Such a substituent may be depicted as -C(S)-.
  • sulfonyl (alone or in combination with another term(s)) means -S(0)2-.
  • aminonosulfonyl (alone or in combination with another term(s)) means - S(0) 2 -NH 2 .
  • sulfinyl or “sulfoxido” (alone or in combination with another term(s)) means -S(O)-.
  • heterocyclyl (alone or in combination with another term(s)) means a saturated (i.e.. “heterocycloalkyl"), partially saturated (i.e., “heterocycloalkenyl”), or completely unsaturated (i.e., "heteroaryl”) ring structure containing a total of 3 to 14 ring atoms. At least one of the ring atoms is a heteroatom (i.e., oxygen, nitrogen, or sulfur), with the remaining ring atoms being independently selected from the group consisting of carbon, oxygen, nitrogen, and sulfur.
  • a heterocyclyl may be a single-ring (monocyclic) or polycyclic ring structure.
  • a heterocyclyl may be a single ring, which typically contains from 3 to 7 ring atoms, more typically from 3 to 6 ring atoms, and even more typically 5 to 6 ring atoms.
  • Examples of single-ring heterocyclyls include furanyl. dihydrofuranyl. tetrahydrofuranyl, thiophenyl (thiofuranyl). dihydrothiophenyl, tetrahydrothiophenyl, pyrrolyl.
  • pyrrolinyl pyrrolidinyl, imidazolyl, imidazolinyl, imidazolidinyl, pyrazolyl, pyrazolinyl, pyrazolidinyl, triazolyl, tetrazolyl, oxazolyl, oxazolidinyl, isoxazolidinyl, isoxazolyl, thiazolyl, isothiazolyl, thiazolyl, isothiazolyl, thiazolinyl, isothiazolinyl, thiazolidinyl, isothiazolidinyl, thiodiazolyl, oxadiazolyl (including 1 ,2,3-oxadiazolyl, 1 ,2,4-oxadiazolyl, 1 ,2, 5 -oxadiazolyl (furazanyl), or 1 ,3,4-oxadiazolyl), oxatriazolyl (including 1 ,2,3,
  • pyridinyl (azinyl), piperidinyl, diazinyl (including pyridazinyl (1,2-diazinyl), pyrimidinyl ( 1 ,3-diazinyl), or pyrazinyl (1 ,4-diazinyl)), piperazinyl. triazinyl (including 1 ,3, -triazinyl, 1.2,4-triazinyl.
  • oxazinyl including 1 ,2-oxazinyl, 1 ,3-oxazinyl, or 1.4- oxazinyl
  • oxathiazinyl including 1 ,2,3-oxathiazinyl, 1.2,4-oxathiazinyl, 1 ,2,5-oxathiazinyl, or 1 ,2,6-oxathiazinyl
  • oxadiazinyl including 1 ,2,3-oxadiazinyl, 1 ,2,4-oxadiazinyl, 1 ,4.2- oxadiazinyl, or 1 ,3, 5 -oxadiazinyl)
  • morpholinyl including 1 ,2-oxazinyl, 1 ,3-oxazinyl, or 1.4- oxazinyl
  • oxathiazinyl including 1 ,2,3-oxathiazinyl, 1.2,4-oxa
  • a heterocyclyl may alternatively be polycyclic (i.e., may contain more than one ring).
  • polycyclic heterocyclyls include bridged, fused, and spirocyclic heterocyclyls.
  • a spirocyclic heterocyclyl one atom is common to two different rings.
  • a bridged heterocycly l the rings share at least two common non-adjacent atoms.
  • a fused-ring heterocyclyl two or more rings may be fused together, such that two rings share one common bond. Examples of fused ring heterocyclyls containing two or three rings include indolizinyl.
  • pyranopyrrolyl 4H-quinolizinyl, purinyl, naphthyridinyl, pyridopyridinyl (including pyrido[3,4-b]-pyridinyl, pyrido[3,2-b]-pyridinyl, or pyrido[4,3-b] -pyridinyl), and pteridinyl.
  • fused-ring heterocyclyls include benzo-fused heterocyclyls, such as indolyl, isoindolyl (isobenzazolyl, pseudoisoindolyl), indoleninyl (pseudoindolyl), isoindazolyl (benzpyrazolyl), benzazinyl (including quinolinyl (1-benzazinyl) or isoquinolinyl (2 -benzazinyl)), phthalazinyl, quinoxalinyl, quinazolinyl, benzodiazinyl (including cinnolinyl ( 1 ,2-benzodiazinyl) or quinazolinyl (1 ,3-benzodiazinyl)).
  • indolyl isoindolyl (isobenzazolyl, pseudoisoindolyl), indoleninyl (pseudoindolyl), isoindazolyl (benzpyrazolyl
  • benzopyranyl including chromanyl or isochromanyl
  • benzoxazinyl including 1 ,3,2-benzoxazinyl. 1.4,2- benzoxaziny l, 2.3.1 -benzoxazinyl. or 3.1.4-benzoxazinyl
  • benzisoxaziny l including 1 ,2- benzisoxazinyl or 1 ,4-benzisoxazinyl.
  • heterocycloalkyl (alone or in combination with another term(s)) means a saturated heterocyclyl.
  • heteroaryl (alone or in combination with another term(s)) means an aromatic heterocyclyl containing from 5 to 14 ring atoms.
  • a heteroaryl may be a single ring or 2 or 3 fused rings.
  • heteroaryl substituents include 6-membered ring substituents such as pyridyl, pyrazyl, pyrimidinyl.
  • pyridazinyl and 1 ,3,5-, 1 ,2,4- or 1 ,2,3- triazinyl; 5-membered ring substituents such as imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, 1,2,3-, 1 ,2,4-, 1 ,2,5-, or 1 ,3,4-oxadiazolyl and isothiazolyh 6/5-membered fused ring substituents such as benzothiofuranyl, benzisoxazolyl, benzoxazolyl, purinyl, and anthranilyl; and 6/6-membered fused rings such as benzopyranyl, quinolinyl, isoquinolinyl, cinnolinyl, quinazolinyl, and benzoxazinyl.
  • 5-membered ring substituents such as imidazyl
  • alkylcycloalkyl contains two components: alkyl and cycloalkyl.
  • the Ci -C 6 - prefix on CpCe-alkylcycloalkyl means that the alkyl component of the alkylcycloalkyl contains from 1 to 6 carbon atoms; the Ci-C6-prefix does not describe the cycloalkyl component.
  • the prefix "halo" on haloalkyloxyalkyl indicates that only the alkyloxy component of the alkyloxyalkyl substituent is substituted with one or more halogen radicals.
  • halogen substitution may alternatively or additionally occur on the alkyl component, the substituent would instead be described as "halogen- substituted alkyloxyalkyl” rather than “haloalkyloxyalkyl.” And finally, if the halogen substitution may only occur on the alkyl component, the substituent would instead be described as "alkyloxyhaloalkyl. "
  • treat refers to a method of alleviating or abrogating a disease and/or its attendant symptoms.
  • prevent refers to a method of preventing the onset of a disease and/or its attendant symptoms or barring a subject from acquiring a disease.
  • prevent also include delaying the onset of a disease and/or its attendant symptoms and reducing a subject's risk of acquiring a disease.
  • terapéuticaally effective amount refers to that amount of the compound being administered sufficient to prevent development of or alleviate to some extent one or more of the symptoms of the condition or disorder being treated.
  • modulate refers to the ability of a compound to increase or decrease the function, or activity, of a kinase.
  • Module as used herein in its various forms, is intended to encompass antagonism, agonism, partial antagonism and/or partial agonism of the activity associated with kinase.
  • Kinase inhibitors are compounds that, e.g., bind to, partially or totally block stimulation, decrease, prevent, delay activation, inactivate, desensitize, or down regulate signal transduction.
  • Kinase activators are compounds that, e.g., bind to, stimulate, increase, open, activate, facilitate, enhance activation, sensitize or up regulate signal transduction.
  • composition as used herein is intended to encompass a product comprising the specified ingredients in the specified amounts, as well as any product which results, directly or indirectly, from combination of the specified ingredients in the specified amounts.
  • pharmaceutically acceptable it is meant the carrier, diluent or excipient must be compatible with the other ingredients of the formulation and not deleterious to the recipient thereof.
  • the "subject” is defined herein to include animals such as mammals, including, but not limited to, primates (e.g., humans), cows, sheep, goats, horses, dogs, cats, rabbits, rats, mice and the like. In preferred embodiments, the subject is a human.
  • the present invention is directed, in part, to a class of compounds having a structure of Formula I
  • Y is CH or ;
  • A is phenyl, naphthy l. indenyl. C3.X cycloalkyl. 4-7 membered heterocycloalkyl, 5-7 membered heterocycloalkenyl, or 5-7 membered heteroaryl;
  • B is (a) phenyl, naphthyl. tetrahydronaphthyl, indenyl. or indanyl, wherein the phenyl, naphthyl, tetrahydronaphthyl, indenyl. or indanyl is optionally susbstituted w ith one. tw o. three, or four R 2 and is substituted with R 3 ; or
  • Z is a bond, Ci-e alkylene, C2-6 alkenylene, -O- or -NR 5 (CH2) P -;
  • R 1 at each occurrence, is independently selected from the group consisting of halo. CN. N0 2 , Ci-6-alkyl, C
  • NR 7 S(0) 2 R 6 and S(0) 2 NR 7 R 8 ; wherein the C3-8 cycloalky 1, aryl, heterocycloalkyl, and heteroaryl are optionally substituted with 1 , 2, or 3 substituents independently selected from halo, Ci - 6 alkyl, Ci -6 haloalkyl, CN. N(3 ⁇ 4, OR A , SR A , C(0)R A , C(0)NR B R C , C(0)OR A , OC(0)R A , OC(0)NR B R C , NR B R C , NR b C(0)R A , S(0)R A , S(0)NR B R C . S(0) 2 R A , NR B S(0) 2 R A , and S(0) 2 NR B R C ;
  • R 2 is independently selected from the group consisting of halo, CN. OH, Ci-6 alkyl, Ci. 6 -haloalkyl, Ci. 6 alkoxy, haloalkoxy, Ci.6-thioalkoxy, amino, C ,. 6 alky lamino, and Ci- 6 dialkylamino;
  • R 3 is selected from the group consisting of aryl, C 3 .g cycloalky 1, heteroaryl, heterocycloalkyl, aryl-Ci-6-alkyl-, C3-8 cycloalkyl-Ci -6-alkyl-, heteroaryl-Ci-6-alkyl-, heterocycIoalkyl-C. 6 -alkyl-, OR 9 , C(0)R 9 , -C,.
  • R 4 is CN, N0 2 , halo, C,. 6 -alkyl, C,. 6 -haloalkyl, OR d , SR d , C(0)R d , C(0)NR e R r , C(0)OR d , NR e R f , NR e C(0)R d , S(0) 2 R d , NR e S(0) 2 R d , or S(0) 2 NR e R f ;
  • R 5 is H or Ci.6-alkyl
  • R 6 , R 7 . and R 8 at each occurrence, are independently selected from H, Ci-6 alkyl, Ci. 6 haloalkyl, ary l, C3-8 cycloalkyl. heteroaryl. and heterocycloalkyl, wherein the aryl, C3-8 cycloalkyl, heteroaryl, and heterocycloalkyl moiety are optionally substituted with 1 , 2, or 3 substituents independently selected from halo, CN, OH, C1.6 alkyl, Ci.6-haloalky l.
  • R 9 , R 10 , and R n are independently selected from H, C1.6 alkyl, Ci. 6 haloalkyl, heteroaryl-Ci-6-alkyl-, heterocycloalkyl-Ci-6-alkyl-, R I 3 R 14 N-Ci-6-alkyl-, aryl, C3- !
  • cycloalkyl heteroaryl, and heterocycloalkyl wherein the aryl, C3-8 cycloalkyl, heteroaryl, and heterocycloalkyl, alone or as part of another moiety, are optionally substituted with 1 , 2, or 3 substituents independently selected from halo, CN, OH, Q.e alkyl, Ci-6-haloalkyl, C1.6 alkoxy, C1.6 haloalkoxy, amino, C1.6 alkylamino, Ci_ 6 dialkylamino, C(0)OH, C(O) Ci_6 alkyl, C(0)NH 2 , C(0)NH(C, -6 alkyl), or C(0)N(C,. 6 alkyl) 2 ;
  • R 12 is independently selected from the group consisting of halo, Ci-6 alkyl, Ci-6 haloalkyl, amino-d-6-alkyl-. Ci.6 alkylamino-Ci.6 alkyl-, Ci-6 dialkylamino-Ci- 6 alkyl-, hydrox -Ci.e-alkyl-.
  • CN N0 2 , OR . SR B . C(0)R , C(0)NR h R', C(0)OR B ,
  • OC(0)R 8 OC(0)NR h R', NR h R', NR h C(0)R B , S(0)R 8 , S(0)NR h R'.
  • S(0) 2 R B , NR h S(0) 2 R s , and S(0) 2 NR h R' wherein the aryl, C3.8 cycloalkyl, heteroaryl, and heterocycloalkyl. alone or as part of another moiety, are optionally substituted with one, two or three substituents independently selected from halo and alkyl;
  • R 13 and R 14 are independently selected from the group consisting of H, C]_6 alkyl, aryl, C 3 .g cycloalkyl, heteroaryl, and heterocycloalkyl; wherein the C].6-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, C
  • C3.8 cycloalkyl, heteroaryl, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, Ci-6-alkyl, Ci.6-haloalkyl, C1.6- hydroxyalkyl, hydroxy, oxo, Ci. 6 -alkoxy, C].6-haloalkoxy, -NH 2 , -NH(C).6-alkyl), and N(Ci.
  • R ⁇ at each occurrence, is independently selected from the group consisting of H, Ci.6 alkyl, aryl, C3-8 cycloalkyl, heteroaryl, and heterocycloalkyl, wherein the Ci-6-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, Ci-6-alkoxy, -NH 2 , -NHCi. 6 -alkyl, and -N(C] .6-alkyl) 2 , and wherein the aryl, C3.8 cycloalkyl, heteroaryl, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo.
  • Ci.6 alkyl, aryl, C 3 suffering8 cycloalkyl, heteroaryl, and heterocycloalkyl; wherein the Ci. 6 -alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, C]. 6 -alkoxy, -NH 2 . -NHC]. 6 -alkyl, and -N(Ci_ 6 -alkyl) 2 , and wherein the aryl, C;,.8 cycloalkyl. heteroaryl.
  • heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, C 1.6— alkyl, C i Hialoalkyl, C1.6- hydroxyalkyl, hydroxy, oxo, C i.e-alkoxy, Ci. 6 -haloalkoxy, -NH 2 , -NH(Ci. 6 -alkyl), and N(C i . 6 -alkyl) 2 ;
  • R d is independently selected from the group consisting of H, C1.6 alkyl, aryl, C3-8 cycloalkyl, heteroaryl, and heterocycloalkyl; wherein the Ci-e-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, C ue-alkoxy, -NH , -NHC i-6-alkyl, and -N(C
  • Ci. f -haloalkyl C1.6- hydroxyalkyl, hydroxy, oxo, Ci -6-alkoxy, Ci-6-haloalkoxy, -NH 2 , -NH(Ci 6-alkyl), and N(C i . 6 -alkyl) 2 ;
  • R e and R f are independently selected from the group consisting of H, Ci-6 alkyl, aryl, C3.8 cycloalkyl, heteroaryl, and heterocycloalkyl; wherein the C]. 6 -alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, Ci-6-alkoxy, -NH 2 , -NHCi-e-alkyl, and -N(Ci.6-alkyl) 2 , and wherein the aryl, C3.8 cycloalkyl.
  • heteroaryl, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, C i -6— alkyl, C i.e-haloalkyl, C ⁇ .e- hydroxyalkyl, hydroxy, oxo, Ci.6-alkoxy, C].6-haloalkoxy, -NH2, -NH(Ci_6-alkyl), and N(C t . 6 -alkyl) 2 ;
  • R at each occurrence, is independently selected from the group consisting of H, C 1.6 alkyl. aryl, C3.8 cvcloalkyl, heteroary l, and heterocvcloalkyl; wherein the Ci.e-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy. C i-6-alkoxy, -NH 2 . -NHCi-6-alk l, and -N(Ci-6-alkyl) 2 , and wherein the aryl.
  • C3-H cycloalkyl, heteroarv'l, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, Ci-6-alkyl, Ci-6-haloalkyl.
  • Ci-e hydroxyalkyl, hydroxy, oxo, Ci-6-alkoxy, C] .6-haloalkoxy, -NH2, -NH(C] .6-alkyl), and N(Ci_ 6 -alk l) 2 ;
  • R h and R' are independently selected from the group consisting of H, Ci-6 alkyl, aryl, C3.8 cycloalkyl. heteroaryl, and heterocycloalkyl; wherein the Ci-6-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, C
  • heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, Ci_ 6 -alkyl, C
  • G is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl
  • X is N; and Y is CH. In another embodiment of formula (I), X is CH; and Y is N. In another embodiment of formula (I). X is N; and Y is N.
  • G 1 is X is CH; and Y is
  • G is X is CH; and Y is N.
  • G X is N; and Y is N.
  • G is X is N: and Y is CH.
  • Z is Ci-6 alkylene. In another embodiment of formula (I), Z is -CH 2 -, -CH 2 CH 2 -, -CH 2 CH 2 CH 2 -, or -CH 2 CH 2 CH 2 CH 2 -. In another embodiment of formula (I), Z is -CH(CH 3 )-, -CH 2 CH(CH 3 )-, -CH(CH 3 )CH 2 -,
  • Z is CH(CH 2 CH 3 )-, -CH 2 CH(CH 2 CH 3 )-, -CH(CH 2 CH 3 )CH 2 -, -CH(CH 2 CH 3 )CH 2 CH 2 -, -CH 2 CH(CH 2 CH 3 )CH 2 -, -CH 2 CH 2 CH(CH 2 CH 3 )-, -C(CH 2 CH 3 ) 2 -, -CH 2 C(CH 2 CH 3 ) 2 -, -C(CH 2 CH 3 ) 2 CH 2 -, -CH 2 CH 2 C(CH 2 CH 3 ) 2 -, -CH 2 C(CH 2 CH 3 ) 2 CH 2 -.
  • Z is -CH 2 -, -CH 2 CH 2 -. -CH(CH 3 )-. or -C(CH 3 ) 2 -. In yet another embodiment of formula (I). Z is -CH 2 -.
  • Z is C 2 .6 alkenylene.
  • Z is a bond
  • Z is NR. 5 , wherein R s is H or C
  • A is phenyl, naphthyl, indenyl or C 3 .s cycloalkyl.
  • A is phenyl
  • A is a 5-7 membered heterocycloalkyl or heterocycloalkenyl.
  • A is pyrrolidinyl, tetrahydrofuryl, tetrahydrothienyl, imidazolidinyl, pyrazolidinyl, piperidinyl, tetrahydropyranyl, piperazinyl, dioxanyl, morpholinyl, 2-oxopyrrolidinyl, 2,5-dioxopyrrolidinyl, 2-oxopiperidinyl, 4- oxopiperidinyl, or 2,6-dioxopiperidinyl.
  • A is dihydrofuranyl, dihydrothiophenyl, pyrrolinyl, imidazolinyl. pyrazolinyl, thiazolinyl, isothiazolinyl. dihydropyranyl. oxathiazinyl. oxadiazinyl. or oxazinyl.
  • A is a 5-7 membered heteroaryl.
  • A is pyridyl, pyrazyl, pyridinyl, pyrimidinyl, pyridazinyl, 1 ,3,5-, 1 ,2,4- or 1 ,2,3-triazinyl, imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, 1 ,2,3-, 1,2,4-, 1 ,2,5-, or 1 ,3,4-oxadiazolyl, or isothiazolyl.
  • A is optionally substituted with -(R') N , wherein n is 0, 1 , 2, or 3.
  • R 1 at each occurrence, is independently selected from the group consisting of halo, CN, N0 2 , Ci-6-alkyl, Ci.6-haloalkyl, aryl, C3-8 cycloalkyl. heteroaryl. heterocycloalkyl, OR 6 , SR 6 , C(0)R 6 , C(0)NR 7 R 8 . C(0)OR 6 .
  • K cycloalkyl, aryl, heterocycloalkyl, and heteroaryl are optionally substituted with 1 , 2, or 3 substituents independently selected from halo, C alkyl.
  • A is phenyl, n is 2, and R 1 , at each occurrence, is halo.
  • B is phenyl. In another embodiment of formula (I), B is phenyl and is unsubstituted with R 2 . In another embodiment, the phenyl is substituted with one or two R 2 , and R 2 is halo, Ci-6-alkyl, C M haloalkyl, or OR 6 .
  • B is phenyl, wherein the phenyl is substituted with R 3 , and R 3 is heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one, two, or three R 12 ; wherein R 12 is halo, Ci.e-alkyl, or C
  • phenyl is substituted with heterocycloalkyl
  • heterocycloalky is selected from the group consisting of azetidinyl, pyrrolidinyl, piperidinyl, morpholinyl, piperazinyl, azepanyl, diazepanyl, and hexahydropyrrolo[ l,2-a]pyrazin-2(l H)yl.
  • R 2 and R 3 are as defined above and m is 0, 1 , or 2.
  • m is 0.
  • R 2 at each occurrence, is independently selected from the group consisting of halo, CN, OH, CM alk l, C1.4- haloalkyl, Ci. 4 alkoxy, Ci_ 4 haloalkoxy, Ci-4-thioalkoxy, amino, C). 4 alkylamino, and C1.4 dialkylamino.
  • m is 1 and R 2 is selected from the group consisting of halo, and Ci. 4 alkoxy.
  • R 3 is selected from the group consisting aryl, C 3 8 cycloalkyl. heteroaryl, heterocycloalkyl, aryl-C). 6-alkyl-, C x cycloalkyl-Ci-e-alkyl-, heteroaryl-Ci- 6 -alkyl-, heterocycloalkyl-Ci-6-alkyl-, OR 9 , C(0)R 9 , C(O)NR l0 R n , C(0)OR 9 , OC(0)R 9 , OC(O)NR 10 R H , NR' °R" .
  • NR 10 C(O)R 9 , S(0)R 9 , S(0)NR in R H , S(0) 2 R 9 , NR 10 S(O) 2 R 9 . and S(O) 2 NR 10 R n wherein the C 3 . s cycloalkyl, aryl, heterocycloalkyl, and heteroaryl, alone or part of another moiety, are optionally substituted with one, two, or three R 12 , wherein R 12 is defined above.
  • B is phenyl
  • R 3 is heterocycloalkyl.
  • R 3 is heterocycloalkyl.
  • R 3 is heterocycloalkyl, which is optionally substituted with one R 12 , and R 12 is selected from the group consisting of halo, Ci-4 alkyl. C1.4 haloalkyl, amino-Ci. 4 -alkyl-. Ci.4 alkylamino-C i-4 alkyl-, C 1.4
  • B is wherein R 2 is halo. Ci -alkyl, Ci haloalkyl, or OR 6 ; p is 0 or 1 .
  • R 12 is Ci -alkyl. Ci e- haloalkyl, OR 8 , C(0)R g , C(0)NR h R', C(0)OR B , NR h R', NR h C(0)R 8 , S(0) 2 R 8 . or
  • B is a 4-8 membered monocyclic heterocvclyl. In another embodiment, B is a 4-8 membered heterocvcloalkvi or heterocvcloalkenvl. In another embodiment. B is a 5-7 membered heteroaryl.
  • B is pyrrolidinyl, tetrahydrofuryl, tetrahydrothienyl, imidazolidinyl, pyrazolidinyl, piperidinyl, tetrahydropyranyl, piperazinyl, dioxanyl, morpholinyl, 2-oxopyrrolidinyl, 2,5- dioxopyrrolidinyl, 2-oxopiperidinyl, 4-oxopiperidinyl, or 2,6-dioxopiperidinyl.
  • B is pyridyl, pyrazyl, pyridinyl, pyrimidinyl, pyridazinyl, 1 ,3,5-, 1 ,2,4- or 1 ,2,3-triazinyl, imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, 1 ,2,3-, 1 ,2,4-, 1 ,2,5-, or 1,3,4-oxadiazolyl, or isothiazolyl.
  • B is unsubstituted.
  • B is substituted with one, two. or three R 4 . and R 4 is halo, Ci 6-alkyl. C,. 6 -haloalkyl.
  • B is a 7-1 1 membered bicyclic heterocyclyl. In another embodiment, B is a 7- 1 1 membered bicyclic heterocycloalkyl or bicyclic heterocyloalkenyl. In another embodiment, B is a 7-1 1 membered bicyclic heteroaryl.
  • B is 2,3-dihydro-2-oxo-lH-indolyl, benzothiazolyl, benzoxazolyl, benzothienyl, quinuclidinyl, quinolinyl, quinolinyl-N-oxide, tetrahydroisoquinolinyl, isoquinolinyl, benzimidazolyl, benzopyranyl, indolizinyl, benzofuryl, chromonyl, coumarinyl, cinnolinyl, quinoxalinyl, indazolyl, pyrrolopyridyl. furopyridinyl,
  • dihydroisoindolyl dihydroquinazolinyl, 3.4-dihydro-4-oxo-quinazolinyl.
  • benzisothiazolyl benzisoxazolyl, benzodiazinyl, benzofurazanyl. benzothiopyranyl, benzotriazolyl.
  • dihydrobenzothiopyranyl dih drobenzothiopyranyl sulfone. dihydrobenzopyranyl.
  • dihydrobenzoxazinyl 3-oxo-3,4-dihydro-l ,4- benzoxazinyl, indolinyl, indazolyl, isochromanyl, isoindolinyl, naphthyridinyl, phthalazinyl, piperonyl, purinyl, pyridopyridyl, pyrrolotriazinyl, quinazolinyl, tetrahydroquinolinyl, thienofuryl, thienopyridyl, 3H- imidazo[4,5-c]pyridinyl, or thienothienyl.
  • B is unsubstituted. In another embodiment of formula (I). B is substituted with one, two, or three R 4 , and R 4 is halo, C,_ 6 -alkyl. C,. 6 -haloalk l, OR d , C(0)R d , C(0)OR d , NR e R f . or S(0) 2 R d .
  • B is 10- 15 membered tricyclic heterocyclyl. In another embodiment, B is a 10- 15 membered tricyclic heterocycloalkyl or tricyclic heterocyloalkenyl. In another embodiment, B is a 1 - 15 membered tricyclic heteroaryl. In one embodiment of formula (I), B is unsubstituted. In another embodiment of formula (I), B is substituted with one, two, or three R 4 , and R 4 is halo, Ci-e-alkyl, Ci-e-haloalkyl, OR d , C(0)R d , C(0)OR d , NR e R f , or S(0) 2 R d .
  • the present invention is directed, in part, to a class of compounds having a structure of Formula (II),
  • R 1 , A, B, Z, and n are as described in formula (II).
  • Z is Ci- ⁇ alkylene.
  • Z is -CH 2 -, -CH 2 CH 2 -, -CH 2 CH 2 CH 2 -, or -CH 2 CH 2 CH 2 CH 2 -.
  • Z is -CH(CH 3 )-, -CH 2 CH(CH 3 )-, -CH(CH 3 )CH 2 -,
  • Z is -CH 2 -, -CH 2 CH 2 -, -CH(CH 3 )-, or -C(CH 3 ) 2 -.
  • Z is -CH 2 -
  • Z is C 2 .6 alkenylene.
  • -CH CHCH 2 -,
  • Z is a bond
  • Z is NR 5 , wherein R 5 is H or Ci. 6 alkyl.
  • A is phenyl, naphthyl, indenyl or C 3 .g cycloalkyl.
  • A is phenyl.
  • A is a 5-7 membered heterocycloalkyl or heterocycloalkenyl.
  • A is pyrrolidinyl
  • A is dihydrofuranyl, dihydrothiophenyl. pyrrolinyl, imidazolinyl, pyrazolinyl, thiazolinyl, isothiazolinyl, dihydropyranyl, oxathiazinyl.
  • A is a 5-7 membered heteroaryl.
  • A is pyridyl, pyrazyl, pyridinyl, pynmidinyl, pyridazinyl, 1 ,3,5-, 1.2,4- or 1 ,2,3-triazinyl, imidazyl. furanyl, thiophenyl, pyrazolyl. oxazolyl, isoxazolyl.
  • thiazolyl 1 ,2.3-, 1 ,2.4-, 1 ,2.5-, or 1 ,3.4-oxadiazolyl, or isothiazol l.
  • A is optionally substituted with -(R') n .
  • n is 0, 1 , 2, or 3.
  • R 1 at each occurrence, is independently selected from the group consisting of halo, CN, NO 2 , Ci-6-alkyl, Ci.
  • A is phenyl, n is 2. and R 1 , at each occurrence. is halo.
  • B is phenyl. In another embodiment of formula (II), B is phenyl and is unsubstituted with R 2 . In another embodiment, the phenyl is substituted with one or two R 2 , and R 2 is halo, Ci-6-alkyl, C 1 .6 haloalkyl, or OR 6 .
  • B is phenyl, wherein the phenyl is substituted with R 3 , and R 3 is heterocycloalkyl. wherein the heterocycloalkyl is optionally substituted with one, two, or three R 12 ; wherein R 12 is halo, Ci-6-alkyl, or Ci-6-haloalkyl.
  • phenyl is substituted with heterocycloalkyl, and heterocycloalky is selected from the group consisting of azetidinyl, pyrrolidinyl, piperidinyl, morpholinyl, piperazinvl. azepanyl, diazepanyl, and hexahydropyrrolo[l,2-a]pyrazin-2(l H)yl.
  • B is phenyl, wherein the phenyl is substituted with R 3 , and R 3 is heterocycloalkyl. wherein the heterocycloalkyl is optionally substituted with one, two, or three R 12 ; wherein R
  • R 2 and R 3 are as defined above and m is 0, 1 , or 2.
  • m is 0.
  • R 2 at each occurrence, is independently selected from the group consisting of halo. CN, OH. C alkyl. Ci.4-haloalkyl, Ci- 4 alkoxy, Ci. 4 haloalkoxy, Ci-4-thioalkoxy, amino, Ci-4 alk lamino, and C dialkylamino.
  • m is 1 and R 2 is selected from the group consisting of halo, and Ci. 4 alkoxy.
  • R 3 is selected from the group consisting aryl, C 3 _s cycloalkyl, heteroaryl, heterocycloalkyl, aryl-Ci. 6-alkyl-, C 3 . 8 cycloalkyl-Ci_ 6 -alkyl-, heteroaryl-Ci. 6 -alkyl-, heterocycloalkyl-Ci. 6 -alkyl-, OR 9 , C(0)R 9 , C(0)NR'°R n , C(0)OR 9 , OC(0)R 9 . OC(O)NR 10 R n . NR 10 R n .
  • heterocycloalkyl which is optionally substituted with one R 12 , and R 12 is selected from the group consisting of halo, C alkyl, C haloalkyl, amino-C M -alkyl-, Ci.4 alkylamino-Ci.4 alkyl-, Ci-4 dialkylamino-Ci.4 alkyl-, hydroxy -Ci-4-alkyl-, CM alkyl-Ci.4 alkoxy, aryl, C 3 _s cycloalkyl, heteroaryl, heterocycloalkyl, aryl-(Ci_ 2 alkyl)-, C 3 _ s cycloalkyl-(Ci.
  • B is wherein R 2 is halo, Ci -alkyl, Ci- ⁇ haloalkyl, or OR 6 ; p is 0 or 1 ; R 12 is Ci-e-alkyl, haloalkvl, OR B , C(0)R g . C(0)NR h R'. C(0)OR s . NR h R', NR h C(0)R s . S(0) 2 R s . or
  • R 2 is halo, Ci -alkyl, Ci. 6 haloalkyl, or OR ; and p is 0, 1 , or
  • B is a 4-8 membered monocyclic heterocyclyl. In another embodiment. B is a 4-8 membered heterocycloalkyl or heterocvcloalkenvl. In another embodiment, B is a 5-7 membered heteroan l, In yet another embodiment of formula (I), B is pyrrolidinyl, tetrahydrofuryl, tetrahydrothienyl, imidazolidinyl, pyrazolidinyl, piperidinyl, tetrahydropyranyl, piperazinyl, dioxanyl, morpholinyl, 2-oxopyrrolidinyl, 2,5- dioxopyrrolidinyl, 2-oxopiperidinyl, 4-oxopiperidinyl, or 2,6-dioxopiperidinyl.
  • B is pyridyl, pyrazyl, pyridinyl, pyrimidinyl, pyridazinyl, 1 ,3,5-, 1 ,2,4- or 1 ,2,3-triazinyl, imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, 1 ,2,3-, 1,2,4-, 1,2,5-, or 1 ,3,4-oxadiazolyl, or isothiazolyl.
  • B is unsubstituted.
  • B is substituted with one, two, or three R 4 , and R 4 is halo, C, .6-alkyl, C,. 6 -haloalkyl, OR d . C(0)R d . C(0)OR d , NR e R f , or S(0) 2 R d .
  • B is a 7-1 1 membered bicyclic heterocyclyl. In another embodiment, B is a 7-1 1 membered bicyclic heterocycloalkyl or bicyclic heterocyloalkenyl. In another embodiment, B is a 7-1 1 membered bicyclic heteroaryl.
  • B is 2,3-dihydro-2-oxo-lH-indolyl, benzothiazolyl, benzoxazolyl, benzothienyl, quinuclidinyl, quinolinyl, quinolinyl-N-oxide, tetrahydroisoquinolinyl, isoquinolinyl, benzimidazolyl, benzopyranyl, indolizinyl, benzofuryl, chromonyl, coumarinyl, cinnolinyl, quinoxalinyl, indazolyl, pyrrolopyridyl, furopyridinyl,
  • dihydroisoindolyl dihydroquinazolinyl, 3,4-dihydro-4-oxo-quinazolinyl, benzisothiazolyl.
  • benzisoxazolyl benzodiazinyl, benzofurazanyl, benzothiopyranyl, benzotriazolyl, benzpyrazolyl, 1 ,3-benzodioxolyl, dihydrobenzofuryl, dihydrobenzothienyl,
  • dihydrobenzothiopyranyl dihydrobenzothiopyranyl sulfone, dihydrobenzopyranyl, dihydrobenzoxazinyl, 3-oxo-3,4-dihydro- l,4- benzoxazinyl, indolinyl, indazolyl, isochromanyl, isoindolinyl, naphthyridinyl, phthalazinyl, piperonyl, purinyl, pyridopyridyl, pyrrolotriazinyl, quinazolinyl, tetrahydroquinolinyl, thienofuryl, thienopyridyl, 3H- imidazo[4,5-c]pyridinyl, or thienothienyl.
  • B is unsubstituted. In another embodiment of formula (II), B is substituted with one, two, or three R 4 , and R 4 is halo, C, . 6 -alkyl, C,. 6 -haloalkyl. OR d , C(0)R d , C(0)OR d . NR e R f , or S(0) 2 R d .
  • B is 10- 15 membered tricyclic heterocyclyl. In another embodiment, B is a 10-15 membered tricyclic heterocycloalkyl or tricyclic heterocyloalkenyl. In another embodiment, B is a 10-15 membered tricyclic heteroaryl. In one embodiment of formula (II), B is unsubstituted. In another embodiment of formula (II), B is substituted with one, two, or three R 4 , and R 4 is halo, Ci.6-alkyl, Ci.6-haloalkyl, OR d , C(0)R d , C(0)OR d , NR e R f , or S(0) 2 R d Embodiments of Formula (III)
  • the present invention is directed, in part, to a class of compounds having a structure of Fo
  • R 1 , A, B, Z, and n are as described in formula (I).
  • Z is Ci.6 alkylene.
  • Z is -CH 2 -, -CH 2 CH 2 -, -CH 2 CH 2 CH 2 -, or -CH 2 CH 2 CH 2 CH 2 -.
  • Z is -CH(CH 3 )-, -CH 2 CH(CH 3 )-, -CH(CH 3 )CH 2 -,
  • Z is CH(CH 2 CH 3 )-. -CH 2 CH(CH 2 CH 3 )-. -CH(CH 2 CH 3 )CH 2 -.
  • Z is -CH 2 -, -CH 2 CH 2 -,
  • Z is -CH 2 -.
  • Z is C 2 -6 alkenylene.
  • Z is a bond
  • Z is NR 5 , wherein R 5 is H or Ci-e alkyl.
  • A is phenyl, naphthyl, indenyl or C3.8 cycloalkyl. In yet another embodiment of formula (III), A is phenyl.
  • A is a 5-7 membered heterocycloalkyl or heterocycloalkenyl.
  • A is pyrrolidinyl
  • A is dihydrofuranyl, dihydrothiophenyl, pyrrolinyl, imidazolinyl, pyrazolinyl, thiazolinyl, isothiazolinyl, dihydropyranyl, oxathiazinyl, oxadiazinyl, or oxazinyl.
  • A is a 5-7 membered heteroaryl.
  • A is pyridyl, pyrazyl, pyridinyl, pyrimidinyl, pyridazinyl, 1 ,3,5- , 1 ,2,4- or 1 ,2,3-triazinyl, imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl. 1 ,2,3-, 1.2,4-, 1 ,2.5-. or 1.3,4-oxadiazolyl. or isothiazolyl.
  • A is optionally substituted with -(R' ) n , wherein n is 0, 1 , 2, or 3.
  • R 1 at each. occurrence, is independently selected from the group consisting of halo, CN, NO 2 , Ci-6-alkyl, Ci ⁇ -haloalkyl, aryl, C3-8 cycloalkyl, heteroaryl, heterocycloalkyl, OR 6 , SR 6 , C(0)R 6 , C(0)NR 7 R 8 , C(0)OR 6 , OC(0)R 6 , OC(0)NR 7 R 8 , NR 7 R 8 , NR 7 C(0)R 6 , S(0)R 6 , S(0)NR 7 R 8 , S(0) 2 R 6 , NR 7 S(0) 2 R 6 , and S(0) 2 NR 7 R 8 ; wherein the C3-8 cycloalkyl, aryl, heterocycloalk l, and heteroaryl are optionally substituted
  • A is phenyl, n is 2, and R 1 . at each occurrence, is halo.
  • B is phenyl. In another embodiment of formula (III), B is phenyl and is unsubstituted with R 2 . In another embodiment, the phenyl is substituted with one or two R 2 , and R 2 is halo, Ci-6-alkyl, C 1.6 haloalkyl, or OR 6 .
  • B is phenyl, wherein the phenyl is substituted w ith R 3 , and R 3 is heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one, two, or three R 12 ; wherein R 12 is halo, Ci-e-alkyl, or Ci e-haloalkyl.
  • phenyl is substituted with heterocycloalkyl, and heterocycloalky is selected from the group consisting of azetidinyl, pyrrolidinyl, piperidinyl, morpholinyl. piperazinyl. azepanyl, diazepanyl, and hexahydropyrrolo
  • B is phenyl, wherein the phenyl is substituted w ith R 3 , and R 3 is heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one,
  • R 2 and R 3 are as defined above and m is 0, 1 , or 2.
  • m is 0.
  • R 2 . at each occurrence, is independently selected from the group consisting of halo. CN, OH. C alkyl, Ci-4-haloaIkyl, C alko y, C1. 4 haloalko.xy, C -thioalkoxy. amino, C 1.4 alky Iamino, and C dialkylamino.
  • m is 1 and R 2 is selected from the group consisting of halo, and Ci ⁇ alkoxy.
  • R 3 is selected from the group consisting aryl, C3-8 cycloalkyl, heteroaryl, heterocycloalkyl, aryl-Ci. 6-alkyl-, C3.8 cycloalkyl-Ci.6-alkyl-, heteroaryl-Ci 6 -alkyl-, heterocycloalkyl-Ci 6 -alkyl-, OR 9 , C(0)R 9 , C(0)NR'°R" . C(0)OR 9 , OC(0)R 9 . OC(O)NR 10 R n , NR I O R" , NR I O C(0)R 9 .
  • heterocycloalkyl which is optionally substituted with one R 12 , and R 12 is selected from the group consisting of halo, CM alkyl. CM haloalkyl, amino-Ci. 4 -alkyl-, Ci 4 alkylamino-Ci.4 alkyl-, Ci 4 dialkylamino-C i 4 alkyl-, hydroxy -C i- 4 -alkyl-, CM alkyl-C1.4 alko.xy. aryl. C3-8 cycloalkyl, heteroaryl, heterocycloalkyl, aryl-(Ci.
  • B is wherein R 2 is halo, Ci -alkyl, Ci.e haloalkyl, or OR 6 ; p is 0 or 1 ; R 12 is Ci-e-alkyl, Ci- 6 - haloalkyl, OR 8 , C(0)R 8 , C(0)NR h R', C(0)OR 8 , NR h R', NR h C(0)R s , S(0) 2 R 6 , or
  • R 2 is halo, Ci -alkyl, Ci -6 haloalkyl, or OR ; and p is 0, 1 , or
  • B is a 4-8 membered monocyclic heterocyclyl. In another embodiment, B is a 4-8 membered heterocycloalkyl or heterocycloalkenyl. In another embodiment, B is a 5-7 membered heteroar l. In yet another embodiment of formula (III). B is pyrrolidinyl, tetrahydrofuryl, tetrahydrothienyl. imidazolidinyl, pyrazolidinyl, piperidinyl, tetrahydropyranyl. piperazinyl, dioxanyl.
  • B is pyridy , pyrazyl, pyridinyl.
  • B is unsubstituted.
  • B is substituted with one, two, or three R 4 , and R 4 is halo, Cj.e-alkyl, C,. 6 -haloalkyl, OR d , C(0)R d , C(0)OR d , NR e R f , or S(0) 2 R d .
  • B is a 7- 1 1 membered bicyclic heterocyclyl. In another embodiment. B is a 7-1 1 membered bicyclic heterocycloalkyl or bicyclic heterocyloalkenyl. In another embodiment. B is a 7-1 1 membered bicyclic heteroaryl. In yet another embodiment, B is 2,3-dihydro-2-oxo-l H-indolyl, benzothiazolyl, benzoxazolyl, benzothienyl, quinuclidinyl, quinolinyl, quinolinyl-N-oxide.
  • benzpyrazol l 1.3-benzodioxolyl. dihydrobenzofuryl, dihydrobenzothienyl.
  • dihydrobenzothiopyranyl dihydrobenzothiopyranyl sulfone, dihydrobenzopyranyl, dihydrobenzoxazinyl, 3-oxo-3,4-dihydro-l,4- benzoxazinyl, indolinyl, indazolyl, isochromanyl, isoindolinyl, naphthyridinyl, phthalazinyl, piperonyl, purinyl, pyridopyridyl, pyrrolotriazinyl, quinazolinyl, tetrahydroquinolinyl, thienofuryl, thienopyridyl, 3H- imidazo[4,5-c]pyridinyl, or thienothienyl.
  • B is unsubstituted. In another embodiment of formula (III), B is substituted with one, two, or three R 4 . and R 4 is halo, C, -6 -alkyl, C,. 6 -haloalkyl, OR d , C(0)R d , C(0)OR d , NR e R f , or S(0) 2 R d
  • B is 10- 15 membered tricyclic heterocyclyl. In another embodiment, B is a 10- 15 membered tricyclic heterocycloalkyl or tricyclic heterocyloalkenyl. In another embodiment, B is a 10- 15 membered tricyclic heteroaryl. In one embodiment of formula (III), B is unsubstituted. In another embodiment of formula (III), B is substituted with one, two, or three R 4 , and R 4 is halo, Ci-e-alkyl, Ci.e-haloalkyl, OR d , C(0)R d , C(0)OR d , NR e R r , or S(0) 2 R d .
  • the present invention is directed, in part, to a class of compounds having a structure of Formula (IV),
  • R 1 , A. B, Z, and n are as described in formula (I).
  • Z is C
  • Z is CH(CH 2 CH 3 )-. -CH 2 CH(CH 2 CH 3 )-, -CH(CH 2 CH 3 )CH 2 -.
  • Z is -CH 2 -, -CH 2 CH 2 -, -CH(CH 3 )-, or -C(CH 3 ) 2 -. In et another embodiment of formula (IV), Z is -CH 2 -.
  • Z is C 2 .6 alkenylene.
  • Z is a bond
  • Z is NR 5 , wherein R 5 is H or C
  • A is phenyl, naphthyl, indenyl or C 3 . s cycloalkyl. In yet another embodiment of formula (IV), A is phenyl.
  • A is a 5-7 membered heterocycloalkyl or heterocycloalkenyl.
  • A is pyrrolidinyl
  • A is dihydrofuranyl, dihydrothiophenyl. pyrrolinyl, imidazolinyl, pyrazolinyl, thiazolinyl, isothiazolinyl, dihydropyranyl, oxathiazinyl, oxadiazinyl, or oxazinyl.
  • A is a 5-7 membered heteroaryl.
  • A is pyridyl, pyrazyl, pyridinyl, pyrimidinyl, pyridazinyl, 1 ,3,5- , 1 ,2,4- or 1 ,2,3-triazinyl, imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl. 1 ,2.3-, 1 ,2,4-, 1 ,2,5-, or 1 ,3.4-oxadiazolyl, or isothiazolyl.
  • A is optionally substituted with -(R') n , wherein n is 0, 1. 2, or 3.
  • R 1 at each occurrence, is independently selected from the group consisting of halo, CN, NO2, Ci-6-alkyl.
  • A is phenyl, n is 2. and R 1 , at each occurrence, is halo.
  • B is phenyl. In another embodiment of formula (IV), B is phenyl and is unsubstituted with R 2 . In another embodiment, the phenyl is substituted with one or two R 2 , and R 2 is halo, Ci-6-alkyl, Ci-6 haloalkyl, or OR 6 .
  • B is phenyl, wherein the phenyl is substituted with R 3 , and R 3 is heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one, two, or three R 12 ; wherein R 12 is halo, Ci-6-alkyl, or Ci-6-haloalkyl.
  • phenyl is substituted with heterocycloalkyl, and heterocycloalky is selected from the group consisting of azetidinyl, pyrrolidinyl. piperidinyl. morpholinyl. piperazinyl. azepanyl, diazepanyl, and hexahydropyrrolo[ l ,2-a]pyrazin-2(l H)yl.
  • B is phenyl, wherein the phenyl is substituted with R 3 , and R 3 is heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one, two, or three R 12 ; where
  • R 2 and R 3 are as defined above and m is 0, 1 , or 2.
  • m is 0.
  • R 2 at each occurrence, is independently selected from the group consisting of halo. CN. OH. C 1.4 alky 1.
  • m is 1 and R 2 is selected from the group consisting of halo, and Ci. 4 alkoxy.
  • R 3 is selected from the group consisting aryl, C3-8 cycloalkyl, heteroaryl, heterocycloalkyl, aryl-Ci- 6-alkyl-, C3. 8 cycloalkyl-Ci.6-alkyl-, heteroaryl-Ci.e-alkyl-, heterocycloalkyl-Ci.6-alkyl-, OR 9 , C(0)R 9 , C(O)NR 10 R" , C(0)OR 9 , OC(0)R 9 , OC(O)NR 10 R n , NR 10 R n , NR 10 C(O)R 9 , S(0)R 9 , S(O)NR ,0 R n , S(0) 2 R 9 , NR 10 S(O) 2 R 9 , and S(O) 2 NR 10 R n , wherein the C 3 .
  • heterocycloalkyl which is optionally substituted with one R 12 , and R 12 is selected from the group consisting of halo, C1.4 alkyl, C haloalkyl, amino-Ci.4-alkyl-, Ci. 4 alkylamino-C i 4 alkyl-, Ci.4 dialkylamino-Ci.4 alkyl-, hydroxy -Ci-4-alkyl-, C M alkyl-Ci-4 alkoxy, aryl, C3.8 cycloalkyl, heteroaryl, heterocycloalkyl, aryl-(Ci.2 alkyl)-, C 3 . 8 cycloalkyl-(Ci.2 alkyl)-, heteroaryl-(C,.
  • heterocycloalkyl alone or as part of another moiety, are optionally substituted with one, two or three substituents independently selected from halo and CM alkyl; and wherein R g , R h , and R' are as defined above.
  • R 2 is halo, Ci-e-alkyl, C e haloalkyl, or OR 6 ; p is 0 or 1 ; R 12 is Ci.e-alkyl, Ci. 6 - haloalkyl, OR 8 , C(0)R g , C(0)NR h R', C(0)OR 8 , NR h R', NR h C(0)R s , S(0) 2 R , or
  • R 2 is halo, Ci-6-alkyl, Ci-6 haloalkyl, or OR 6 ; and p is 0, 1 , or
  • B is a 4-8 membered monocyclic heterocyclyl. In another embodiment, B is a 4-8 membered heterocycloalkyl or heterocycloalkenyl. In another embodiment, B is a 5-7 membered heteroaryl. In yet another embodiment of formula (IV), B is pyrrolidinyl, tetrah drofuryl, tetrahydrothienyl, imidazolidinyl, pyrazolidinyl, piperidinyl, tetrahydropyranyl, piperazinyl, dioxanyl, morpholinyl.
  • B is pyridyl, pyrazyl, pyridinyl, pyrimidinyl, pyridazinyl, 1 ,3,5-, 1 ,2,4- or 1 ,2,3-triazinyl, imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, 1 ,2,3-, 1,2,4-, 1,2,5-, or 1 ,3,4-oxadiazolyl, or isothiazolyl.
  • B is unsubstituted.
  • B is substituted with one, two, or three R 4 , and R 4 is halo, C,. 6 -alkyl, C,. 6 -haloalkyl, OR d , C(0)R d , C(0)OR d , NR e R f , or S(0) : R d .
  • B is a 7- 1 1 membered bicyclic heterocyclyl. In another embodiment, B is a 7-1 1 membered bicyclic heterocycloalkyl or bicyclic heterocyloalkenvl. In another embodiment, B is a 7-1 1 membered bicyclic heteroaryl. In yet another embodiment, B is 2,3-dihydro-2-oxo-l H-indolyl. benzothiazolyl, benzoxazolyl. benzothienyl, quinuclidinyl, quinolinyl, quinolinyl-N-oxide, tetrahydroisoquinolinyl.
  • dihydrobenzothiopyranyl dihydrobenzothiopyranyl sulfone, dihydrobenzopyranyl, dihydrobenzoxazinyl, 3-oxo-3,4-dihydro- l ,4- benzoxazinyl, indolinyl, indazolyl, isochromanyl, isoindolinyl, naphthyridinyl, phthalazinyl, piperonyl.
  • B is unsubstituted.
  • B is substituted with one, two, or three R 4 , and R 4 is halo, C,. 6 -alkyl, C,. 6 -haloalkyl, OR d , C(0)R d , C(0)OR d , NR e R f , or S(0) 2 R d
  • B is 10-15 membered tricyclic heterocyclyl. In another embodiment, B is a 10- 15 membered tricyclic heterocycloalkyl or tricyclic heterocyloalkenvl. In another embodiment, B is a 10- 15 membered tricyclic heteroaryl. In one embodiment of formula (IV), B is unsubstituted. In another embodiment of formula (IV), B is substituted with one, two, or three R 4 , and R 4 is halo, Ci-6-alkyl, Ci-6-haloalkyl, OR d , C(0)R d , C(0)OR d , NR e R', or S(0) 2 R d . Specific embodiments contemplated as part of the invention include, but are not limited to, compounds of formula (I), for example:
  • Compounds of this invention may contain asymmetrically substituted carbon atoms in the R or S configuration, wherein the terms "R” and “S” are as defined in Pure Appl. Chem. (1976) 45, 13-10.
  • Compounds having asymmetrically substituted carbon atoms with equal amounts of R and S configurations are racemic at those atoms. Atoms having excess of one configuration over the other are assigned the configuration in excess, preferably an excess of about 85%-90%, more preferably an excess of about 95%-99%, and still more preferably an excess greater than about 99%. Accordingly, this invention is meant to embrace racemic mixtares and relative and absolute diastereoisomers of the compounds thereof.
  • Compounds of this invention may also contain carbon-carbon double bonds or carbon-nitrogen double bonds in the E or Z configuration, wherein the term ⁇ " represents higher order substituents on opposite sides of the carbon-carbon or carbon-nitrogen double bond and the term “Z” represents higher order substituents on the same side of the carbon- carbon or carbon-nitrogen double bond as determined by the Cahn-Ingold-Prelog Priority Rules.
  • the compounds of this invention may also exist as a mixture of "E” and "Z" isomers.
  • geometric isomers may exist in the present compounds.
  • the invention contemplates the various geometric isomers and mixtures thereof resulting from the disposition of substituents around a cycloalkyl group or a heterocycle group. Substituents around a cycloalkyl or a heterocycle are designated as being of cis or trans configuration.
  • Compounds of this invention may also exist as tautomers or equilibrium mixtures thereof wherein a proton of a compound shifts from one atom to another.
  • tautomers include, but are not limited to, keto-enol, phenol-keto, oxime-nitroso, nitro-aci, imine-enamine and the like. Tautomeric forms are intended to be encompassed by the scope of this invention, even though only one tautomeric form may be depicted.
  • This invention also is directed, in part, to all salts of the compounds of formula (I).
  • a salt of a compound may be advantageous due to one or more of the salt's properties, such as. for example, enhanced pharmaceutical stability in differing temperatures and humidities, or a desirable solubility in water or other solvents.
  • the salt preferably is pharmaceutically acceptable and/or physiologically compatible.
  • pharmaceutically acceptable is used adjectivally in this patent application to mean that the modified noun is appropriate for use as a pharmaceutical product or as a part of a pharmaceutical product.
  • Pharmaceutically acceptable salts include salts commonly used to form alkali metal salts and to form addition salts of free acids or free bases. In general, these salts typically may be prepared by conventional means by reacting, for example, the appropriate acid or base with a compound of the invention.
  • Pharmaceutically acceptable acid addition salts of the compounds of formula (I) can be prepared from an inorganic or organic acid.
  • inorganic acids include hydrochloric, hydrobromic, hydroiodic, nitric, carbonic, sulfuric, and phosphoric acid.
  • Suitable organic acids generally include, for example, aliphatic, cycloaliphatic, aromatic, araliphatic, heterocyclic, carboxylic, and sulfonic classes of organic acids.
  • Specific examples of often suitable organic acids include acetate, trifluoroacetate, formate, propionate, succinate, glycolate, gluconate, digluconate, lactate, malate. tartaric acid, citrate, ascorbate. glucuronate, maleate.
  • Pharmaceutically acceptable base addition salts of the compounds of formula (1) include, for example, metallic salts and organic salts.
  • Preferred metallic salts include alkali metal (group la) salts, alkaline earth metal (group Ila) salts, and other physiologically acceptable metal salts. Such salts may be made from aluminum, calcium, lithium, magnesium, potassium, sodium, and zinc.
  • Preferred organic salts can be made from amines, such as tromethamine, diethylamine, ⁇ , ⁇ '-dibenzylethylenediamine, chloroprocaine, choline, diethanolamine, ethylenediamine, meglumine (N-methylglucamine), and procaine.
  • Basic nitrogen-containing groups can be quaternized with agents such as lower alkyl (C1-C6) halides (e.g., methyl, ethyl, propyl, and butyl chlorides, bromides, and iodides), dialkyl sulfates (e.g., dimethyl, diethyl, dibutyl. and diamyl sulfates), long chain halides (e.g.. decyl, lauryl, myristyl, and stearyl chlorides, bromides, and iodides), arylalkyl halides (e.g., benzyl and phenethyl bromides), and others.
  • C1-C6 halides e.g., methyl, ethyl, propyl, and butyl chlorides, bromides, and iodides
  • dialkyl sulfates e.g., dimethyl, diethyl, dibuty
  • Protecting groups for C(0)OH moieties include, but are not limited to. acetoxymethyl. ally 1, benzoylmethyl, benzyl, benzy loxymethy l. tert-butyl. tert-butyldipheny lsilyl, diphenylmethyl, cyclobutvl. cyclohexyl, cyclopentvl, cyclopropyl, diphenylmethvlsilyl, ethyl, para-methox benzyl, methoxymethyl, methoxyethoxymethyl, methyl, methylthiomethyl.
  • Protecting groups for NH moieties include, but are not limited to. acetyl, alany l. benzoyl. benzyl (phenylmethyl). benzylidene, benzyloxycarbonv l (Cbz). tert-butoxycarbonyl (Boc). 3,4-dimethoxybenzyloxycarbonyl, diphenylmethyl, dipheny lphosphoryl, formyl.
  • methanesulfonyl para-methoxybenzyloxycarbonyl, phenylacetyl, phthaloyl, succinyl, trichloroethoxycarbonyl, triethylsilyl, trifhioroacetyl, trimethy lsily 1, triphenylmethyl, triphenylsilyl, para-toluenesulfonyl and the like.
  • Protecting groups for OH and SH moieties include, but are not limited to, acetyl, allyl, allyloxycarbonyl, benzy loxycarbon l (Cbz), benzoyl, benzyl, tert-butyl,
  • tert-butyldimethy lsily 1. tert-butyldiphenylsilyl, 3.4-dimethoxybenzyl.
  • methanesulfonyl methanesulfonyl, methoxyacetyl, 4-methoxybenzylo.xycarbonyl, para-methoxy benzyl, methoxycarbonyl, methyl, para-toluenesulfonyl, 2,2,2-trichloroethoxycarbonyl, 2,2,2-trichloroethyl, triethylsilyl, trifluoroacetyl, 2-(trimethylsilyl)ethoxycarbonyl, 2-trimethylsilylethyl, triphenylmethyl, 2-(triphenylphosphonio)ethoxycarbonyl and the like.
  • compounds of formula (1) wherein A, Z, R 1 and n are as described herein, can be reacted at room temperature with ⁇ , ⁇ -carbonyldiimidazole in a solvent such as, but not limited to, dry tetrahydrofuran, followed by the addition magnesium chloride and ethyl potassium malonate at elevated temperature, to provide compounds of formula (2).
  • a solvent such as, but not limited to, dry tetrahydrofuran
  • magnesium chloride and ethyl potassium malonate at elevated temperature
  • cyanoborohydride The reaction is typically performed in a solvent such as. but not limited to, methanol at elevated temperatures.
  • Compounds of formula (4) can be prepared by reacting compounds of formula (3) with acetic acid, ethyl acetoacetate, and magnesium sulfate. The reaction is typically performed at elevated temperature, in a solvent such as but not limited to toluene.
  • Compounds of formula (4) can be reacted with a base such as, butnot limited to, potassium t-butoxide at ambient temperature in a solvent such as but not limited to tetrahydrofuran. to provide compounds of formula (5).
  • Compounds of formula (6) can be prepared by reacting compounds of formula (5) with 2,3-dichloro-5,6-dicyano- l ,4- benzoquinone. A solvent such as but not limited to tetrahydrofuran is typically employed. Compounds of formula (6) can be reacted with phosphorus oxychloride to provide compounds of formula (7). The reaction is typically performed at elevated temperature. Compounds of formula (8) can be prepared from compounds of formula (7) by reacting the latter with compounds of formula (7A), wherein B, R 2 , R 3 , and m are as described herein, in the presence of p-toluenesulfonic acid.
  • reaction is typically performed at elevated temperature in a solvent such as but not limited to n-butanol.
  • Compounds of formula (9), which are representative of the compounds of this invention, can be prepared by reacting compounds of formula (8) with sodium hydride, followed by 1 ,3.5-triazine at elevated temperature. The reaction is typically performed in a solvent such as but not limited to N.N- dimethylform amide.
  • Potassium hydroxide can be added to a solution of 2-cyanoacetamide and ethyl 3- oxobutanoate in a solvent such as but not limited to methanol to provide 2,6-dihydroxy-4- methylnicotinonitrile, as shown in Scheme 2.
  • the reaction is typically performed at elevated temperature.
  • 2,6-Dihydroxy-4-methylnicotinonitrile and phosphorus oxychloride can heated in a sealed tube without an additional solvent to provide 2.6-dichloro-4-methylnicotinonitrile.
  • ⁇ , ⁇ -Dimethylformamide dimethyl acetal can be added to a solution of 2,6-dichloro-4- mewylnicotinonitrile in a solvent such as but not limited to N,N-dimethylformarnide to provide (E)-2,6-dichloro-4-(2-(dimethylamino)vinyl)nicotinonitrile.
  • the reaction is typically performed at an elevated temperature.
  • Concentrated hydrochloric acid and (E)-2,6-dichloro- 4-(2-(dimethylamino)vinyl)nicotinonitrile can be heated in a sealed tube to provide 6,8- dichloro-2,7-naphthyridin-l(2H)-one (10).
  • Compounds of formula (1 1) can be prepared from compounds of formula (10) by reacting the latter with compounds of formula (7A), wherein B, R 2 , R 3 , and m are as described herein, in a solvent such as but not limited to N- methylpyrrolidone. The reaction is typically performed at elevated temperature and may be performed in a microwave oven.
  • Compounds of formula (12), which are representative of the compounds of this invention, can be prepared by reacting compounds of formula (1 1) with an organozinc compound of formula (1 1 A), wherein Z, A, R 1 , and n are as described herein and X 2 is a halide.
  • the reaction typically involves the use of heat and a nickel or palladium catalyst such as but not limited to bis(triphenylphosphine)palladium(II) dichloride in a solvent such as but not limited to N-methylpyrrolidone, tetrahydrofuran, or mixtures thereof.
  • a nickel or palladium catalyst such as but not limited to bis(triphenylphosphine)palladium(II) dichloride in a solvent such as but not limited to N-methylpyrrolidone, tetrahydrofuran, or mixtures thereof.
  • 2,6-dihydroxypyridine-4-carboxylic acid and phosphoryl trichloride can be heated in a sealed tube to provide 2,6-dichloropyridine-4-carboxylic acid.
  • Diphenylphosphoryl azide and a base such as but not limited to N,N-diisopropylethylamine in tert-butanol (200 mL) can be added to 2,6-dichloropyridine-4-carboxylic acid to provide tert-butyl 2,6-dichloropyridin-4-ylcarbamate.
  • the reaction typically requires the use of heat.
  • Carboxylation of tert-butyl 2.6-dichloropyridin-4-ylcarbamate to provide 4-(tert- butoxycarbonylamino)-2,6-dichloronicotinic acid can be performed by bubbling dry carbon dioxide gas through a solution of tert-butyl 2,6-dichloropyridin-4-ylcarbamate and ⁇ , ⁇ . ⁇ ', ⁇ '- tetramethylethylenediamine treated with n-butyl lithium.
  • n-butyl lithium is typically added at low temperature to a mixture of tert-butyl 2,6-dichloropyridin-4-ylcarbamate and ⁇ , ⁇ , ⁇ ', ⁇ '-tetramethylethylenediamine in a solvent such as but not limited to
  • the reaction typically involves the use of heat and a solvent such as but not limited to ⁇ , ⁇ -dimethylformamide.
  • 5,7-Dichloropyrido[4,3-d]pyrimidin-4(3H)-one can be reacted with a compound of formula (7A) , wherein B. R 2 , R 3 , and m are as described herein, in the presence of a base such as but not limited to triethylamine, to provide compounds of formula ( 13).
  • the reaction is typically performed at elevated temperature in a solvent such as but not limited to 1 ,4-dioxane.
  • Compounds of formula ( 14), which are representative of the compounds of this invention, can be prepared by reacting compounds of formula (13) with an organozinc compound of formula (1 1A), wherein Z, A, R 1 , and n are as described herein and X 2 is a halide.
  • the reaction typically involves the use of heat and a nickel or palladium catalyst such as but not limited to bis(triphenylphosphine)palladium(II) dichloride in a solvent such as but not limited to N-methylpyrrolidone, tetrahydrofuran, or mixtures thereof.
  • a nickel or palladium catalyst such as but not limited to bis(triphenylphosphine)palladium(II) dichloride in a solvent such as but not limited to N-methylpyrrolidone, tetrahydrofuran, or mixtures thereof.
  • Carboxylation of 2.6-dibromopyridine to provide 2,6-dibromonicotinic acid and 2.6- dibromoisonicotinic acid can be performed by bubbling dry carbon dioxide gas to a solution of 2,6-dibromopyridine and diisopropylamine treated with n-butyl lithium.
  • the n-butyl lithium is typically added at low temperature to a mixture of 2,6-dibromopyridine and diisopropylamine in a solvent such as but not limited to tetrathydrofuran, before adding the carbon dioxide gas and warming to room temperature.
  • a mixture of 2,6-dibromonicotinic acid and 2,6-dibromoisonicotinic acid can be added at low temperature to a solution of a base, such as, but not limited to, 2,2,6,6-tetramethylpiperidine, in a solvent, such as, but not limited to, tetrahydrofuran. and n-butyllithium to provide 4,6-dibromo- l -hydroxyfuro[3,4- c)pyridin-3( l H)-one and 4.6-dibromo-3-hydroxyfuro[3,4-c]pyridin-l (3H)-one.
  • the reaction is typically stirred at low temperature for several hours before the addition of N,N- dimethylformamide.
  • a mixture of 4,6-dibromo-l -hydroxyfuro[3,4-c]pyridin-3( l H)-one and 4,6-dibromo-3-hydroxyfuro[3,4-c]pyridin-l (3H)-one can be reacted with hydrazine hydrochloride in the presence of a base such as but not limited to triethylamine to provide, after purification, 5,7-dibromopyrido[3,4-d]pyridazin-4-ol.
  • the reaction typically requires an elevated temperature and maybe performed in a solvent such as but not limited to isopropanol.
  • 5,7-Dibromopyrido[3,4-d]pyridazin-4-ol can be reacted with a compound of formula (7 A) , wherein B, R 2 , R 3 , and m are as described herein, in the presence of a base such as but not limited to diisopropylethylamine or trieth lamine, to provide compounds of formula (1 ).
  • the reaction is typically performed at elevated temperature in a solvent such as but not limited to 1 ,4-dio.xane.
  • Compounds of formula ( 17), which are representative of the compounds of this invention, can be prepared by reacting compounds of formula (16) with an organozinc compound of formula (1 1 A), wherein Z, A, R 1 , and n are as described herein and X 2 is a halide.
  • the reaction typically involves the use of heat, copper(I) iodide, and a nickel or palladium catalyst such as but not limited to 1 , l '-bis(diphenylphosphino)ferrocene- palladium(II) dichloride in a solvent such as but not limited to N-methylpyrrolidone, tetrahydrofuran, or mixtures thereof.
  • 2,6-dichloropyridine 1-oxide can be prepared by reacting a solution of 2,6-dichloropyridine, 30% hydrogen peroxide, and an acid such as but not limited to trifluoroacetic acid at elevated temperature.
  • 2,6-Dichloropyridine 1-oxide can be reacted with phosphorus oxychloride at elevated temperature to provide 2,4,6-trichloropyridine.
  • Carbo ylation of 2,4.6-trichloropyridine to provide 2,4.6-trichloronicotinic acid can be performed by adding solid carbon dioxide (dry ice) to a solution of 2,4.6-trichloropyridine and diisopropylamine treated with n-butyl lithium.
  • n-butyl lithium is typically added at low temperature to a mixture of 2.4,6-trichloropyridine and diisopropylamine in a solvent such as but not limited to tetrathydrofuran, before adding the carbon dioxide gas and warming to room temperature.
  • tert-Butyl 2-(2,4,6-trichloronicotinamido)ethylcarbamate can be prepared from 2,4,6-trichloronicotinic acid by reacting the latter first with oxalyl chloride at low temperature in a solvent such as but not limited to dichloromethane, N,N- dimethylformamide, or mixtures thereof.
  • the resulting crude acid chloride can be reacted with tert-butyl 2-aminoethylcarbamate in the presence of a base such as but not limited to triethylamine at low temperature in a solvent such as but not limited to dichloromethane to provide tert-butyl 2-(2,4,6-trichloronicotinamido)ethylcarbamate.
  • a base such as but not limited to triethylamine at low temperature
  • a solvent such as but not limited to dichloromethane
  • tert-Butyl 2-(2,4 >- trichloronicotinamido)ethylcarbamate can be treated with an acid such as but not limited to trifluoroacetic acid in a solvent such as but not limited to dichloromethane, to provide N-(2- aminoethyl)-2,4,6-trichloronicotinamide.
  • an acid such as but not limited to trifluoroacetic acid in a solvent such as but not limited to dichloromethane
  • 6,8-Dichloro-l ,2,3,4-tetrahydropyrido[2,3- e][ l,4]diazepin-5-one can be prepared by reacting N-(2-aminoethyl)-2,4,6- trichloronicotinamide with cesium fluoride in the presence of a base such as but not limited to triethylamine.
  • the reaction typically requires the use of heat and is performed in a solvent such as but not limited to ⁇ , ⁇ -dimethylformamide.
  • 6,8-Dichloro-l ,2,3,4- tetrahydropyrido[2,3-e][ l ,4]diazepin-5-one can be reacted with a compound of formula (7A) .
  • B, R 2 , R 3 , and m are as described herein, in the presence of a base such as but not limited to diisopropylethylamine or triethylamine, to provide compounds of formula ( 18).
  • the reaction is typically performed at elevated temperature in a solvent such as but not limited to 1,4-dioxane.
  • Compounds of formula (1 ), which are representative of the compounds of this invention, can be prepared by reacting compounds of formula (18) with an organozinc compound of formula (1 1 A), wherein Z, A, R 1 , and n are as described herein and X 2 is a halide.
  • the reaction typically involves the use of heat, and a nickel or palladium catalyst such as but not limited to tetrakis(triphenylphosphine)palladium in a solvent such as but not limited to N-methylpyrrolidone, tetrah drofuran, or mixtures thereof. Additionally, the reaction may be performed in a microwave oven.
  • 2,4,6-Trichloronicotinic acid which can be prepared as described in Scheme 5, can be treated at ambient temperature with oxalyl chloride in a solvent such as but not limited to dichloromethane, ⁇ , ⁇ -dimethylformamide, or mixtures thereof.
  • Ammonia gas can be bubbled through a solution of the crude acid chloride in a solvent such as but not limited to tetrahydrofuran to provide 2,4,6-trichloronicotinamide.
  • 2-Amino-4,6-dichloronicotinamide can be prepared by reacting 2,4,6-trichloronicotinamide w ith ammonia. The reaction is typically performed at elevated temperature in a solvent such as but not limited to 1 ,4- dioxane.
  • 2-Amino-4,6-dichloronicotinamide can be reacted with triethyl orthoformate at elevated temperature to provide 5,7-dichloropyrido[2,3-d]pyrimidin-4(3H)-one. 5,7-
  • Dichloropyrido[2,3-d]pyrimidin-4(3H)-one can be reacted with a compound of formula (7A). wherein B, R 2 , R 3 , and m are as described herein, in the presence of a base such as but not limited to diisopropylethylamine or triethylamine, to provide compounds of formula (20).
  • the reaction is typically performed at elevated temperature in a solvent such as but not limited to 1 ,4-dioxane.
  • Compounds of formula (21), which are representative of the compounds of this invention, can be prepared by reacting compounds of formula (20) with an organozinc compound of formula (1 1A), wherein Z, A, R 1 , and n are as described herein and X 2 is a haiide.
  • the reaction typically involves the use of heat, and a nickel or palladium catalyst such as but not limited to tetrakis(triphenylphosphine)palladium in a solvent such as but not limited to N-methylpyrrolidone, tetrahydrofuran, or mixtures thereof.
  • Carboxylation of 2,4,6-trichloropyrimidine to provide 2,4,6-trichloropyrimidine-5- carboxylic acid can be performed by adding solid carbon dioxide (dry ice) to a solution of 2,4,6-trichloropyridine and diisopropylamine treated with n-butyl lithium.
  • the n-butyl lithium is typically added at low temperature to a mixture of 2.4,6-trichloropyridine and diisopropylamine in a solvent such as but not limited to tetrahydrofuran. before adding the carbon dioxide gas and warming to room temperature.
  • 4-Amino-2,6-dichloropyrimidine-5- carboxamide can be prepared from 2.4,6-trichloropyrimidine-5-carboxylic acid by reacting the latter first with oxalyl chloride at low temperature in a solvent such as but not limited to dichloromethane, ⁇ , ⁇ -dimethylformamide, or mixtures thereof.
  • a solvent such as but not limited to dichloromethane, ⁇ , ⁇ -dimethylformamide, or mixtures thereof.
  • the resulting crude acid chloride can be reacted with ammonium hydroxide at low temperature in a solvent such as but not limited to tetrahydrofuran to provide 4-amino-2,6-dichloropyrimidine-5-carboxamide.
  • 4-Amino-2,6-dichloropyrimidine-5-carboxamide can be reacted with a compound of formula (7 A) , wherein B, R ⁇ R 3 , and m are as described herein, in the presence of a base such as but not limited to diisopropylethylamine or triethylamine, to provide compounds of formula (22).
  • the reaction is typically performed at elevated temperature in a solvent such as but not limited to 1 ,4-dioxane.
  • Triethyl orthoformate can be reacted with compounds of formula (22) to provide compounds of formula (23),
  • the reaction typically involves the use of heat and may employ a solvent such as but not limited to ⁇ , ⁇ -dimethylformamide.
  • Compounds of formula (24), which are representative of the compounds of this invention, can be prepared by reacting compounds of formula (23) with an organozinc compound of formula (1 1 A), wherein Z, A, R 1 , and n are as described herein and X 2 is a halide.
  • the reaction typically involves the use of heat, and a nickel or palladium catalyst such as but not limited to bis(triphenylphosphine)palladium(II) dichloride in a solvent such as but not limited to N- methylpyrrolidone, tetrahydrofuran, or mixtures thereof.
  • a nickel or palladium catalyst such as but not limited to bis(triphenylphosphine)palladium(II) dichloride in a solvent such as but not limited to N- methylpyrrolidone, tetrahydrofuran, or mixtures thereof.
  • the present invention provides pharmaceutical compositions for modulating kinase activity in a humans and animals that will typically contain a compound of formula (I) and a pharmaceutically acceptable carrier.
  • Compounds having formula (I) may be administered, for example, bucally, ophthalmic ally, orally, osmotically, parenterally (intramuscularly, intraperintoneally intrasternally, intravenously, subcutaneously), rectally, topically, transdermally, vaginally and intraarterially as well as by intraarticular injection, infusion, and placement in the body, such as, for example, the vasculature.
  • Compounds having formula (I) may be administered with or without an excipient.
  • Excipients include, but are not limited to, encapsulators and additives such as absorption accelerators, antioxidants, binders, buffers, coating agents, coloring agents, diluents, disintegrating agents, emulsifiers, extenders, fillers, flavoring agents, humectants, lubricants, perfumes, preservatives, propellants, releasing agents, sterilizing agents, sweeteners, solubilizers, wetting agents, mixtures thereof and the like.
  • encapsulators and additives such as absorption accelerators, antioxidants, binders, buffers, coating agents, coloring agents, diluents, disintegrating agents, emulsifiers, extenders, fillers, flavoring agents, humectants, lubricants, perfumes, preservatives, propellants, releasing agents, sterilizing agents, sweeteners, solubilizers, wetting agents, mixtures thereof and the like.
  • Excipients for preparation of compositions comprising a compound having formula (I) to be administered orally include, but are not limited to, agar, alginic acid, aluminum hydroxide, benzyl alcohol, benzyl benzoate, 1 ,3-butylene glycol, carbomers, castor oil, cellulose, cellulose acetate, cocoa butter, corn starch, corn oil, cottonseed oil, cross-povidone, diglycerides, ethanol, ethyl cellulose, ethyl laureate, ethyl oleate, fatty acid esters, gelatin, germ oil, glucose, glycerol, groundnut oil, hydroxypropylmethyl celluose, isopropanol, isotonic saline, lactose, magnesium hydroxide, magnesium stearate, malt, mannitol, monoglycerides, olive oil, peanut oil, potassium phosphate salts, potato starch, povidone, propylene
  • Excipients for preparation of compositions comprising a compound having formula (I) to be administered ophthalmically or orally include, but are not limited to, 1 ,3-butylene glycol, castor oil, corn oil, cottonseed oil, ethanol, fatty acid esters of sorbitan, germ oil, groundnut oil, glycerol, isopropanol, olive oil, polyethylene glycols, propylene glycol, sesame oil, water, mixtures thereof and the like.
  • Excipients for preparation of compositions comprising a compound having formula (I) to be administered osmotically include, but are not limited to, chlorofluorohydrocarbons. ethanol. water, mixtures thereof and the like.
  • Excipients for preparation of compositions comprising a compound having formula (I) to be administered parenterally include, but are not limited to, 1 ,3-butanediol, castor oil, corn oil, cottonseed oil, dextrose, germ oil, groundnut oil, liposomes, oleic acid, olive oil. peanut oil, Ringer's solution, safflower oil, sesame oil, soybean oil, U.S. P. or isotonic sodium chloride solution, water, mixtures thereof and the like.
  • Excipients for preparation of compositions comprising a compound having formula (I) to be administered rectally or vaginally include, but are not limited to, cocoa butter, polyethylene glycol, wax, mixtures thereof and the like.
  • compositions and the method of the present invention may further comprise other therapeutically active compounds as noted herein which are usually applied in the treatment of the above-mentioned pathological conditions.
  • the present invention provides methods of using a compound or composition of the invention to treat or prevent a disease or condition involving mediation, overexpression or disregulation of kinases in a mammal.
  • compounds of this invention are expected to have utility in treatment of diseases or conditions during which protein kinases such as any or all CDC-7 family members are expressed.
  • diseases and conditions of humans or other animals that can be treated with inhibitors of kinases include, but are not limited to. acoustic neuroma, acute leukemia, acute lymphocytic leukemia, acute myelocytic leukemia
  • chondrosarcoma chordoma, choriocarcinoma, chronic leukemia, chronic lymphocytic leukemia, chronic myelocytic (granulocytic) leukemia, chronic myleogeneous leukemia, colon cancer, colorectal cancer, craniopharyngioma, cystadenocarcinoma, diffuse large B-cell lymphoma, dysproliferative changes (dysplasias and metaplasias), embryonal carcinoma, endometrial cancer, endotheliosarcoma, ependymoma, epithelial carcinoma, erythroleukemia, esophageal cancer, estrogen-receptor positive breast cancer, essential thrombocythemia.
  • Ewing's tumor fibrosarcoma, follicular lymphoma, germ cell testicular cancer, glioma, heavy chain disease, hemangioblastoma, hepatoma, hepatocellular cancer, hormone insensitive prostate cancer, leiomyosarcoma, liposarcoma, lung cancer,
  • lymphagioendotheliosarcoma lymphangiosarcoma
  • lymphoblastic leukemia lymphoma (Hodgkin's and non-Hodgkin's)
  • malignancies and hyperproliferative disorders of the bladder, breast, colon, lung, ovaries, pancreas, prostate, skin and uterus lymphoid malignancies of T-cell or B-cell origin, leukemia, lymphoma, medullary carcinoma, medulloblastoma.
  • melanoma meningioma, mesothelioma, multiple myeloma, myelogenous leukemia, myeloma, myxosarcoma, neuroblastoma, non-small cell lung cancer,
  • oligodendroglioma oral cancer, osteogenic sarcoma, ovarian cancer, pancreatic cancer.
  • papillary adenocarcinomas papillary carcinoma, pinealoma, polycythemia vera, prostate cancer, rectal cancer, renal cell carcinoma, retinoblastoma, rhabdomyosarcoma, sarcoma, sebaceous gland carcinoma, seminoma, skin cancer, small cell lung carcinoma, solid tumors (carcinomas and sarcomas), small cell lung cancer, stomach cancer, squamous cell carcinoma, synovioma, sweat gland carcinoma, thyroid cancer, Waldenstrom's
  • the methods of the present invention typically involve administering to a subject in need of therapeutic treatment an effective amount of a compound of formula (I).
  • Therapeutically effective amounts of a compound having formula (I) depend on recipient of treatment, disease treated and severity thereof, composition comprising it. time of administration, route of administration, duration of treatment, potency, rate of clearance and whether or not another drug is co-administered.
  • the amount of a compound having formula (I) used to make a composition to be administered daily to a patient in a single dose or in divided doses is from about 0.03 to about 200 mg/kg body weight.
  • Single dose compositions contain these amounts or a combination of submultiples thereof.
  • the present invention further provides methods of using a compound or composition of the invention in combination with one or more additional active agents.
  • Compounds having Formula (I) are expected to be useful when used with alkylating agents, angiogenesis inhibitors, antibodies, antimetabolites, antimitotics, antiproliferatives, antivirals, aurora kinase inhibitors, apoptosis promoters (for example, Bcl-xL, Bcl-w and Bfl- 1 ) inhibitors, activators of death receptor pathway, Bcr-Abl kinase inhibitors, BiTE (Bi- Specific T cell Engager) antibodies, antibody drug conjugates, biologic response modifiers, cyclin-dependent kinase inhibitors, cell cycle inhibitors, cyclooxygenase-2 inhibitors, DVDs, leukemia viral oncogene homolog (ErbB2) receptor inhibitors, growth factor inhibitors, heat shock protein (HSP)-90 inhibitors, histone deacetylase (HDAC) inhibitors, hormonal therapies, immunologicals, inhibitors of inhibitors of apoptosis proteins (I APs), intercalating antibiotic
  • BiTE antibodies are bi-specific antibodies that direct T-cells to attack cancer cells by simultaneously binding the two cells. The T-cell then attacks the target cancer cell.
  • BiTE antibodies include adecatumumab (Micromet MT201), blinatumomab (Micromet MT 103) and the like.
  • cytolytic granule components which include perforin and granzyme B.
  • Bcl-2 has been shown to attenuate the induction of apoptosis by both perforin and granzyme B.
  • SiRNAs are molecules having endogenous RNA bases or chemically modified nucleotides. The modifications do not abolish cellular activity, but rather impart increased stability and/or increased cellular potency. Examples of chemical modifications include phosphorothioate groups, 2'-deoxynucleotide, 2'-OCH 3 -containing ribonucleotides, 2'-F- ribonucleotides. 2'-methoxyethyl ribonucleotides, combinations thereof and the like.
  • the siRNA can have vary ing lengths (e.g., 10-200 bps) and structures (e.g., hairpins, single/double strands, bulges, nicks/gaps, mismatches) and are processed in cells to provide active gene silencing.
  • a double-stranded siRNA (dsRNA) can have the same number of nucleotides on each strand (blunt ends) or asymmetric ends (overhangs). The overhang of 1-2 nucleotides can be present on the sense and/or the antisense strand, as well as present on the 5'- and/ or the 3'-ends of a given strand.
  • Multivalent binding proteins are binding proteins comprising two or more antigen binding sites. Multivalent binding proteins are engineered to have the three or more antigen binding sites and are generally not naturally occurring antibodies.
  • the term "multispecific binding protein” means a binding protein capable of binding two or more related or unrelated targets.
  • Dual variable domain (DVD) binding proteins are tetravalent or multivalent binding proteins binding proteins comprising two or more antigen binding sites. Such DVDs may be monospecific (i.e., capable of binding one antigen) or multispecific (i.e., capable of binding two or more antigens). DVD binding proteins comprising two heavy chain DVD polypeptides and two light chain DVD polypeptides are referred to as DVD Ig's.
  • Each half of a DVD Ig comprises a heavy chain DVD polypeptide, a light chain DVD polypeptide, and two antigen binding sites.
  • Each binding site comprises a heavy chain variable domain and a light chain variable domain with a total of 6 CDRs involved in antigen binding per antigen binding site.
  • Multispecific DVDs include DVD binding proteins that bind DLL4 and VEGF, or C-met and EFGR or ErbB3 and EGFR
  • Alkylating agents include altretamine, AMD-473. AP-5280. apaziquone, bendamustine, brostallicin, busulfan, carboquone, carmustine (BCNU), chlorambucil, CLORETAZINE ® (laromustine, VNP 40101 M), cyclophosphamide, decarbazine, estramustine, fotemustine, glufosfamide, ifosfamide, KW-2170, lomustine (CCNU), mafosfamide, melphalan, mitobronitol, mitolactol, nimustine, nitrogen mustard N-oxide, ranimustine, temozolomide, thiotepa, TREANDA ® (bendamustine), treosulfan, rofosfamide and the like.
  • BCNU carmustine
  • CLORETAZINE ® laromustine, VNP 40101 M
  • cyclophosphamide dec
  • Angiogenesis inhibitors include endothelial-specific receptor tyrosine kinase (Tie-2) inhibitors, epidermal growth factor receptor (EGFR) inhibitors, insulin growth factor-2 receptor (1GFR-2) inhibitors, matrix metalloproteinase-2 (MMP-2) inhibitors, matrix metalloproteinase-9 (MMP-9) inhibitors, platelet-derived growth factor receptor (PDGFR) inhibitors, thrombospondin analogs, vascular endothelial growth factor receptor tyrosine kinase (VEGFR) inhibitors and the like.
  • Tie-2 endothelial-specific receptor tyrosine kinase
  • EGFR epidermal growth factor receptor
  • MMP-2 matrix metalloproteinase-2
  • MMP-9 matrix metalloproteinase-9
  • PDGFR platelet-derived growth factor receptor
  • VEGFR vascular endothelial growth factor receptor tyrosine kinase
  • Antimetabolites include ALIMTA ® (pemetrexed disodium, LY231514, MTA), 5-azacitidine, XELODA ® (capecitabine), carmofur, LEUSTAT ® (cladribine), clofarabine, cytarabine, cytarabine ocfosfate, cytosine arabinoside. decitabine, deferoxamine, doxifluridine, eflornithine. EICAR (5-ethvnyl- 1 - -D-ribofuranosylimidazole-4- carboxamide), enocitabine. ethnylcytidine, fludarabine, 5-fluorouracil alone or in combination with leucovorin, GEMZAR ® (gemcitabine), hydroxyurea,
  • ALKERAN ® (melphalan), mercaptopurine, 6-mercaptopurine riboside, methotrexate, mycophenolic acid, nelarabine, nolatrexed, ocfosfate, pelitrexol, pentostatin, raltitrexed, Ribavirin, triapine, trimetrexate, S-1 , tiazofurin, tegafur, TS-1 , vidarabine, UFT and the like.
  • Antivirals include ritonavir, hydroxychloroquine and the like
  • Aurora kinase inhibitors include ABT-348, AZD- 1 152, MLN-8054, VX-680, Aurora A-specific kinase inhibitors, Aurora B-specific kinase inhibitors and pan-Aurora kinase inhibitors and the like.
  • Bcl-2 protein inhibitors include AT- 101 ((-)gossypol).
  • Bcr-Abl kinase inhibitors include DASATINIB ® (BMS-354825), GLEEVEC ® (imatinib) and the like.
  • CDK inhibitors include AZD-5438, BMI- 1040, BMS-032, BMS-387, CVT-2584, flavopyridol, GPC-286199, MCS-5A, PD0332991 , PHA-690509, seliciclib (CYC-202,
  • COX -2 inhibitors include ABT-963, ARCOXIA ® (etoricoxib), BEXTRA ®
  • EGFR inhibitors include ABX-EGF, anti-EGFR immunoliposomes, EGF-vaccine,
  • EMD-7200 EMD-7200, ERBITUX ® (cetuximab), HR3, IgA antibodies, IRESSA ® (gefitinib),
  • TARCEVA ® (erlotinib or OSI-774), TP-38, EGFR fusion protein, TY ERB ® (lapatinib) and the like.
  • ErbB2 receptor inhibitors include CP-724-714, CI-1033 (canertinib), HERCEPTIN ® (trastuzumab), TYKERB ® (lapatinib), OMNITARG ® (2C4, petuzumab), TAK- 165, GW-572016 (ionafarnib), GW-282974, EKB-569, PI- 166, dHER2 (HER2 vaccine), APC-8024 (HER-2 vaccine). anti-HER/2neu bispecific antibody, B7.her2IgG3. AS HER2 trifunctional bispecfic antibodies.
  • mAB AR-2 9. mAB 2B- 1 and the like.
  • Histone deacetylase inhibitors include depsipeptide, LAQ-824, S-275, trapoxin, suberoylanilide hydroxamic acid (SAHA), TSA, valproic acid and the like.
  • HSP-90 inhibitors include 17-AAG-nab, 17-AAG, CNF- 101, CNF-1010, CNF-2024, 17-DM AG, geldanamycin, IPI-504, KOS-953, MYCOGRAB ® (human recombinant antibody to HSP-90), NCS-683664, PU24FC1, PU-3, radicicol, SNX-21 12, STA-9090 VER49009 and the like.
  • Inhibitors of inhibitors of apoptosis proteins include HGS 1029, GDC-0145, GDC- 0152, LCL- 1 1. LBW-242 and the like.
  • Antibody drug conjugates include anti-CD22-MC-MMAF, anti-CD22-MC-MMAE. anti-CD22-MCC-DM l . CR-01 1 -vcMMAE. PSMA-ADC, MEDI-547, SGN- 19Am SGN-35. SGN-75 and the like
  • Activators of death receptor pathway include TRAIL, antibodies or other agents that target TRAIL or death receptors (e.g., DR4 and DR5) such as Apomab, conatumumab,
  • ETR2-ST01 GDC0145, (lexatumumab), HGS-1029, LBY-135, PRO-1762 and trastuzumab.
  • Kinesin inhibitors include Eg5 inhibitors such as AZD4877, ARRY-520; CENPE inhibitors such as GSK923295A and the like.
  • JAK-2 inhibitors include CEP-701 (lesaurtinib), XL019 and I CBO 18424 and the like.
  • ME inhibitors include ARRY- 142886, ARRY-438162 PD-325901. PD-98059 and the like.
  • mTOR inhibitors include AP-23573. CCI-779, everolimus, RAD-001 , rapamycin, temsirolimus, ATP-competitive TORC 1/TORC2 inhibitors, including PI- 103, PP242, PP30, Torin 1 and the like.
  • Non-steroidal anti-inflammatory drugs include AMIGESIC ® (salsalate), DOLOBID ® (diflunisal), MOTRIN ® (ibuprofen), ORUDIS ® (ketoprofen), RELAFEN ® (nabumetone), FELDENE ® (piroxicam), ibuprofen cream.
  • ALEVE ® naproxen
  • NAPROSYN ® naproxen
  • VOLTAREN ® diclofenac
  • INDOCIN ® indomethacin
  • CLINORIL ® (sulindac), TOLECTIN ® (tolmetin), LODINE ® (etodolac), TORADOL ® (ketorolac), DAYPRO ® (oxaprozin) and the like.
  • PDGFR inhibitors include C-451 , CP-673, CP-868596 and the like.
  • Platinum chemotherapeutics include cisplatin, ELOXATIN ® (oxaliplatin) eptaplatin, lobaplatin, nedaplatin, PARAPLATIN ® (carboplatin), satraplatin, picoplatin and the like.
  • Polo-like kinase inhibitors include BI-2536 and the like.
  • Phosphoinositide-3 kinase (PI3K) inhibitors include wortmannin, LY294002, XL- 147, CAL-120, ONC-21. AEZS- 127. ETP-45658. PX-866. GDC-094 I , BGT226. BEZ235. XL765 and the like.
  • Thrombospondin analogs include ABT-510, ABT-567. ABT-898, TSP- 1 and the like.
  • VEGFR inhibitors include AVASTIN ® (bevacizurrrab), ABT-869, AEE-788,
  • ANGIOZYMETM a ribozyme that inhibits angiogenesis (Ribozyme Pharmaceuticals (Boulder, CO.) and Chiron, (Emeryville, CA)) , axitinib (AG- 13736), AZD-2171 ,
  • Antibiotics include intercalating antibiotics aclarubicin, actinomycin D, amrubicin, annamycin, adriamycin, BLENOXANE ® (bleomycin), daunorubicin, CAELYX ® or
  • MYOCET ® liposomal doxorubicin
  • elsamitrucin epirbucin
  • glarbuicin glarbuicin
  • ZAVEDOS ® idarubicin
  • mitomycin C nemorubicin
  • neocarzinostatin peplomycin
  • pirarubicin rebeccamycin
  • streptozocin VALSTAR ® (valrubicin)
  • zinostatin and the like valrubicin
  • Topoisomerase inhibitors include aclarubicin, 9-aminocamptothecin, amonafide, amsacrine, becatecarin, belotecan, BN-80915, CAMPTOSAR ® (irinotecan hydrochloride), camptothecin, CARDIOXANE ® (dexrazoxine), diflomotecan, edotecarin.
  • ELLENCE ® or PHARMORUBICIN ® epirubicin
  • etoposide exatecan
  • 10-hydrox camptothecin 10-hydrox camptothecin.
  • gimatecan lurtotecan, mitoxantrone, orathecin, pirarbucin, pixantrone, rubitecan, sobuzoxane, SN-38, tafluposide, topotecan and the like.
  • Antibodies include AVASTIN ® (bevacizumab), CD40-specific antibodies, chTNT- 1/B, denosumab, ERBITUX ® (cetuximab), HUMAX-CD4 ® (zanolimumab), IGFlR-specific antibodies, lintuzumab, PANOREX ® (edrecolomab), RENCAREX ® (WX G250),
  • RITUXAN ® rituximab
  • ticilimumab ticilimumab
  • trastuzimab CD20 antibodies types I and II and the like.
  • Hormonal therapies include AR1MIDEX ® (anastrozole), AROMASIN ® (exemestane). arzoxifene, CASODEX ® (bicalutamide), CETROTIDE ® (cetrorelix), degarelix, deslorelin, DESOPAN ® (trilostane), dexamethasone, DROGENIL ® (flutamide). EVISTA ® (raloxifene).
  • AFEMATM fadrozole
  • FARESTON ® toremifene
  • FASLODEX ® fullvestrant
  • FEMARA ® letrozole
  • formestane glucocorticoids
  • HECTOROL ® doxercalciferol
  • RENAGEL ® silane-like compound
  • lasofoxifene leuprolide acetate
  • MEGACE ® leuprolide acetate
  • MIFEPREX ® (mifepristone), NILANDRONTM (nilutamide), NOLVADEX ® (tamoxifen citrate), PLENAXISTM (abarelix), prednisone, PROPECIA ® (finasteride), rilostane,
  • SUPREFACT ® buserelin
  • TRELSTAR ® luteinizing hormone releasing hormone (LHRH)
  • VANTAS ® Histrelin implant
  • VETORYL ® trilostane or modrastane
  • ZOLADEX* fosrelin, goserelin
  • Deltoids and retinoids include seocalcitol (EB 1089. CB 1093), lexacalcitrol
  • PARP inhibitors include ABT-888 (veliparib), olaparib, KU-59436, AZD-2281 , AG- 014699, BSI-201 , BGP-15, INO-1001, ONO-2231 and the like.
  • Plant alkaloids include, but are not limited to, vincristine, vinblastine, vindesine, vinorelbine and the like.
  • Proteasome inhibitors include VELCADE ® (bortezomib). MG132. NPI-0052, PR- 171 and the like.
  • immunologicals include interferons and other immune-enhancing agents.
  • Interferons include interferon alpha, interferon alpha-2a, interferon alpha-2b, interferon beta, interferon gamma- l a, ACTIMMUNE ® (interferon gamma- l b) or interferon gamma-n l , combinations thereof and the like.
  • agents include ALFAFERONE ® ,(IFN-ot), BAM- 002 (oxidized glutathione), BEROMU ® (tasonermin), BEXXAR ® (tositumomab), CAMPATH ® (alemtuzumab), CTLA4 (cytotoxic lymphocyte antigen 4), decarbazine, denileukin, epratuzumab, GRANOCYTE ® (lenograstim), lentinan, leukocyte alpha interferon, imiquimod, MDX- 10 (anti-CTLA-4). melanoma vaccine, mitumomab.
  • MYLOTARGTM gemtuzumab ozogamicin
  • NEUPOGEN ® filgrastim
  • OncoVAC-CL OVAREX ® (oregovomab), pemtumomab (Y-muHMFGl ).
  • PROVENGE ® (sipuleucel-T), sargaramostim, sizofilan, teceleukin, THERACYS ® (Bacillus Calmette- Guerin), ubenimex, VIRULIZIN ® (immunotherapeutic, Lorus Pharmaceuticals), Z-100 (Specific Substance of Maruyama (SSM)), WF-10 (Tetrachlorodecaoxide (TCDO)), PROLEUKIN ® (aldesleukin), Z AD AX IN ® (thymalfasin), ZENAPAX ® (daclizumab), ZEVALIN ® (9()Y-Ibritumomab tiuxetan) and the like.
  • Biological response modifiers are agents that modify defense mechanisms of living organisms or biological responses, such as survival, growth or differentiation of tissue cells to direct them to have anti-tumor activity and include krestin. lentinan, sizofiran, picibanil PF- 3512676 (CpG-8954), ubenimex and the like.
  • Pyrimidine analogs include cytarabine (ara C or Arabinoside C), cytosine arabinoside, doxifluridine, FLUDARA ® (fludarabine), 5-FU (5-fluorouracil), floxuridine, GEMZAR ® (gemcitabine), TOMUDEX ® (ratitrexed), TROXATYLTM (triacetyluridine troxacitabine) and the like.
  • Purine analogs include LANVIS ® (thioguanine) and PURI-NETHOL ®
  • Antimitotic agents include batabulin, epothilone D (KOS-862), N-(2-((4- hydroxyphenyl)amino)pyridin-3-yl)-4-methoxybenzenesulfonamide, ixabepilone (BMS 247550), paclitaxel, TAXOTERE (docetaxel), PNU 100940 (109881 ), patupilone.
  • XRP-9881 larotaxel
  • vinflunine vinflunine
  • ZK-EPO synthetic epothilone
  • Ubiquitin ligase inhibitors include MDM2 inhibitors, such as nutlins, NEDD8 inhibitors such as MLN4924 and the like.
  • Radiosensitizers that enhance the efficacy of radiotherapy .
  • radiotherapy include external beam radiotherapy, teletherapy, brachytherapy and sealed, unsealed source radiotherapy and the like.
  • compounds having Formula (I) may be combined with other chemotherapeutic agents such as ABRAXAN ETM (ABI-007).
  • ABT- 1 0 farnesyl transferase inhibitor
  • ADVEXIN ® Ad5CM V-p53 vaccine
  • ALTOCOR ® or EVACOR ® lovastatin
  • AMPLIGEN ® poly I :poly C12U, a synthetic RNA
  • APTOSY ® exisulind
  • AREDIA ® pamidronic acid
  • arglabin L-asparaginase, atamestane (l -methyl-3.17-dione-androsta-l ,4- diene
  • AVAGE ® tazarotene
  • AVE-8062 combreastatin derivative
  • BEC2 mitumomab
  • cachectin or cachexin canvaxin
  • canvaxin vaccine
  • CEAVAC ® canvaxin
  • ADR1 AMYCI ® (hydroxydoxorubicm): O: Vincristine (ONCOVIN ® ); P: prednisone), CYPATTM (cyproterone acetate), combrestatin A4P, DAB(389)EGF (catalytic and translocation domains of diphtheria toxin fused via a His-Ala linker to human epidermal growth factor) or TransMID- 107RTM (diphtheria toxins), dacarbazine, dactinomycin.
  • DMXAA 5,6- dimethylxanthenone-4-acetic acid
  • eniluracil eniluracil
  • EVIZONTM squalamine lactate
  • DIMERICI E ® T4N5 liposome lotion
  • discodermolide DX-8951 f (exatecan mesylate), enzastaurin
  • EPO906 epidermalone B
  • GARDASIL ® quaddrivalent human papillomavirus (Types 6, 1 1, 16, 18) recombinant vaccine
  • GASTRIMMU E ® GENASENSE ®
  • GMK ganglioside conjugate vaccine
  • GVAX ® prostate cancer vaccine
  • halofuginone histerelin, hydroxycarbamide, ibandronic acid
  • IGN- 101 IGN- 101.
  • IL-13-PE38, IL- 13-PE38QQR Cintredekin besudotox
  • IL-13-pseudomonas exotoxin interferon-a, interferon- ⁇
  • JUNOVANTM or MEPACTTM miifamurtide
  • lonafarnib 5, 10-methylenetetrahydrofolate
  • miltefosine hexadecylphosphocholine
  • NEOVASTAT ® AE-941
  • NEUTREXIN ® rrimetrexate glucuronate
  • NIPENT ® pentostatin
  • ONCONASE ® a ribonuclease enzyme
  • ONCOPHAGE ® (melanoma vaccine treatment), ONCOVAX ® (IL-2 Vaccine),
  • ORATHECINTM (rubitecan), OSIDEM ® (antibody -based cell drug), OVAREX ® MAb (murine monoclonal antibody), paclitaxel, PANDIMEXTM (aglycone saponins from ginseng comprising 20(S)protopanaxadiol (aPPD) and 20(S)protopanaxatriol (aPPT)), panitumumab.
  • PANVAC -VF investigational cancer vaccine
  • pegaspargase pegaspargase.
  • PEG Interferon A phenoxodiol, procarbazine, rebimastat, REMOVAB ® (catumaxomab), REVLIMID ® (lenalidomide), RSR13 (efaproxiral).
  • SOMATULINE ® LA lanreotide
  • SORIATANE ® acitretin
  • staurosporine Streptomyces staurospores
  • talabostat PT100
  • TARGRETIN ® bexarotene
  • TAXOPREXIN ® DHA-paclitaxel
  • TELCYTA ® canfosfamide, TLK286)
  • temilifene TEMODAR ® (temozolomide), tesmilifene, thalidomide
  • THERATOPE ® STn- LH
  • thymitaq (2-amino-3,4-dihydro-6-methyl-4-oxo-5-(4-pyridylthio)quinazoline dihydrochloride
  • TNFERADETM adenovector: DNA carrier containing the gene for tumor necrosis factor-a).
  • TRACLEER ® or Z AVESCA ® (bosentan), tretinoin (Retin-A), tetrandrine, TRISENOX ® (arsenic trioxide).
  • VIRULIZIN ® ukrain (derivative of alkaloids from the greater celandine plant), vitaxin (anti-alphavbeta3 antibody), XCYTRI ® (motexafin gadolinium), X INLAYTM (atrasentan), XYOTAXTM (paclitaxel poliglumex), YON DELIS ® (trabectedin), ZD-6126, ZINECARD ® (dexrazoxane), ZOMETA ® (zolendronic acid), zorubicin and the like.
  • EXAMPLE 2E (103 mg, 0. 1 mmol) was dissolved in a mixture of methanol (7 mL) and concentrated hydrochloric acid (3 mL). The mixture was concentrated under reduced pressure and was neutralized with saturated aqueous sodium bicarbonate solution. The aqueous phase was extracted with ethyl acetate (3 x 1 0 mL) and the combined organic layers were dried over sodium sulfate, filtered, and concentrated. The residue was purified by preparative HPLC (acetonitrile/water containing 0.1% trifluoroacetic acid) to give the title compound as a mono-trifluoroacetate salt.
  • 2,6-dichloropyridine 1 -oxide A solution of 2,6-dichloropyridine (4.0 g, 27.0 mmol), 30% hydrogen peroxide (5.2 g, 46.0 mmol) and trifluoroacetic acid (40.0 g) was stirred at 100°C for 6 hours. The mixture was diluted with water (50 mL) and extracted with ethyl acetate (3 x 50 mL). The organic layers were separated, washed with aqueous sodium bicarbonate and water, and concentrated under vacuum to give the title compound, which was used in the next step without further purification.
  • the mixture was acidified with 10% aqueous hydrochloric acid (20 mL), diluted with aqueous saturated sodium chloride and extracted with ethyl acetate. The organic layer was washed, dried over anhydrous sodium sulfate, filtered, and concentrated under vacuum. The solvent was removed under vacuum to give the crude title compound which was used in the next step without further purification.
  • the mixture was acidified with 10% aqueous hydrochloric acid (20 mL), diluted with an aqueous saturated sodium chloride solution and extracted with ethyl acetate. The organic layer was washed, dried over anhydrous sodium sulfate, filtered, and concentrated under vacuum. The solvent was removed under vacuum to give the crude title compound which was used in the next step without further purification.
  • EXAMPLE 10A (80 mg, 0.13 mmol) was dissolved in a mixture of methanol (7 mL) and concentrated hydrochloric acid (3 mL). The mixture was concentrated under reduced pressure and was neutralized with saturated aqueous sodium bicarbonate solution. The aqueous phase was extracted with ethyl acetate (3 x 100 mL) and the combined organic layers were dried over sodium sulfate, filtered, and concentrated. The residue was purified by preparative HPLC (acetonitrile/water containing 0. 1 % trifluoroacetic acid) to give the title compound as a mono-trifluoroacetate salt. ⁇ NMR (DMS0-- 300 MHz): ⁇ 12.24 (s. 1 H).
  • diethy 1 2-(3-methoxy -4-nitropheny l)malonate To a solution of diethyl malonate (10.3 g, 64.3 mmol) in dry N,N-dimethylformamide (40 mL) at 0°C was added 60% sodium hydride in mineral oil (3.51 g, 88 mmol) in portions over 30 minutes. A solution of 4-fluoro-2-methoxy- l -nitrobenzene (10 g, 58.5 mmol) in N,N-dimethylformamide (10 mL) was added dropwise and the mixture was stirred at 90°C overnight. The mixture was diluted with water and exacted with ethyl acetate (3 x 20 mL).
  • EXAMPLE 18A 0.3 g, 0.96 mmol
  • ethanol 2 mL
  • 2N sodium hydroxide 2 mL
  • the mixture was concentrated, diluted with water and washed with ethyl acetate.
  • the aqueous phase was acidified with concentrated hydrochloridic acid to pH 2-3 and extracted with ethyl acetate (3 5 mL).
  • the combined organic phase was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated and the residue used in the next step without further purification.
  • EXAMPLE 27A ie -butyl 4-(4-(7-(2 hloro-5-fluorophenylamino)-4-oxo-3.4-dihydropyrido[3,4- ⁇ pyridaziri- 5 -y lamino)-3-methoxy pheny l)piperazine- 1 -carboxy late
  • the title compound was obtained following the procedure described in EXAMPLE 24B, using 2-chloro-5-fiuoroaniline in place of 2-chlorobenzenamine. MS: 596 (M + H + ).
  • EXAMPLE 7K 120 mg, 0.56 mmol
  • dioxane 10 mL
  • EXAMPLE 30A 136 mg, 0.6 ] mmol
  • NN-diisopropy lethylamine 724 mg, 5.6 mmol

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Abstract

The present invention relates to compounds of formula (1) or pharmaceutical acceptable salts, wherein R1, X, Y, Z, A, B, G1, and n are defined in the description. The present invention relates also to compositions containing said compounds which are useful for inhibiting kinases such as ALK and methods of treating diseases such as cancer.

Description

BICYCLIC INHIBITORS OF ALK
FIELD OF THE INVENTION
This invention pertains to compounds which inhibit the activity of anaphastic lymphoma kinase (ALK), methods of making the compounds, compositions containing the compounds, and methods of treatment using the compounds.
BACKGROUND OF THE INVENTION
Signaling through receptor tyrosine kinases (RTKs) regulates and fine-tunes many processes including cell growth, proliferation, differentiation, and apoptosis. The improper activation of RTKs is involved in the pathogenesis, growth, and metastasis of many cancers. The receptor tyrosine kinase ALK (Anaplastic Lymphoma Kinase) is a member of the insulin receptor superfamily that was initially identified from the I(2;5)(p23;q35) translocation in anaplastic large cell lymphoma (ALCL) (Fischer, P., et al. Blood, 72: 234-240. (1988)). The protein product of this translocation is ALK fused to nucleophosmin (NPM) (Morris et al.. 1994). When fused to ALK, the dimerization domain of NPM results in constitutive dimerization and activation of ALK (reviewed in Chiarle, R., Nature reviews, 8: 1 1 -23 (2008)). Once activated, ALK recruits several adaptor proteins and stimulates multiple signaling pathways known to mediate tumor cell growth and survival including STAT3, PLC-γ, RAS-ERK1.2, and PI3K-AKT (Bai, R.Y.. et al. Molecular and cellular biology 18: 695 1 -6961 ( 1998); Bai, R.Y.. et al. Blood 96:4319-4327 (2000); Chiarle, R., et l. Nature medicine 1 1 :623-629 (2005); Pulford. K., et al. Journal of cellular physiology 199:330-358 (2004)). The dysregulation of ALK is highly oncogenic, as it is sufficient to induce cell transformation in a several immortalized cell lines (Bischof, D., et al. Molecular and cellular biology 17:2312-2325 (1997); Fujimoto, J., et al. Proceedings of the National Academy of Sciences of the United States of America 93: 4181-4186 (1996)) and to form tumors in animal models (Chiarle, R., et al. Blood 101 : 1919-1927 (2003); Kuefer, M.U., et al. Blood 90: 2901-2910 (1997)). Moreover, NPM-ALK drives tumor formation, proliferation and survival in ALCL (reviewed in ( Duyster, J., et al. Oncogene 20: 5623-5637 (2001 )).
More recently. ALK translocations have been detected in -5% of non-small cell lung cancers (NSCLC). Similar to ALK translocations in ALCL, the fusion proteins in NSCLC display constitutive ALK activity and drive tumor growth and survival (Soda et al.. Nature 448: 561-566 (2007); Soda et al., Proceedings of the National Academy of Sciences of the United States of America 105: 19893- 19897 (2008)). NSCLC tumors harboring ALK translocations are mutually exclusive from K-Ras or EGFR aberrations and predominantly occur in younger patients that are non-smokers (Rodig et al., Clin Cancer Res 15 : 5216-5223 (2009); Shaw et al., J Clin Oncol 27: 4247-4253 (2009); Wong et al., Cancer 1 15: 1723-1733 (2009)). In addition to chromosomal rearrangements, activating point mutations and amplifications have been reported in a subset of sporadic and familial neuroblastomas, further expanding the spectrum of tumors dependent on ALK activity (Chen et al.. Nature 455 : 971 - 974 (2008); George et al., Nature 455: 975-978 (2008); Janoueix-Lerosey et al.. Nature 455 : 967-970 (2008); Mosse et al.. Nature 455. 930-935 (2008)). Neuroblastomas with ALK genetic aberrations also are dependent on ALK for proliferation and survival, and cells expressing ALK containing activating mutations form tumors in animal models.
Inhibitors of RTKs have the potential to cause lethality in cancerous cells that are reliant on deregulated RTK activity while sparing normal tissues. Thus, small molecule inhibitors of ALK would be beneficial for therapeutic intervention in ALCL, NSCLC, neuroblastoma, and other cancers that are dependent on ALK for growth and survival.
SUMMARY OF THE INVENTION
The present invention has numerous embodiments. One embodiment of this invention, therefore, pertains to compounds that have formula (I)
Figure imgf000003_0001
Formula (I)
wherein R1, n, X, Y, Z, A, B, and G1 are as defined below and subsets therein.
Also provided are pharmaceutically acceptable compositions, comprising a therapeutically effective amount of a compound of formula (I) and a pharmaceutically acceptable salt in combination with a pharmaceutically suitable carrier. One embodiment is directed to a method of treating cancer in a mammal comprising administering thereto a therapeutically acceptable amount of a compound or pharmaceutically acceptable salt of formula (I). Another embodiment pertains to a method of decreasing tumor volume in a mammal comprising administering thereto a therapeutically acceptable amount of a compound or pharmaceutically acceptable salt of formula (I).
DETAILED DESCRIPTION OF THE INVENTION
This detailed description is intended only to acquaint others skilled in the art with Applicants' invention, its principles, and its practical application so that others skilled in the art may adapt and apply the invention in its numerous forms, as they may be best suited to the requirements of a particular use. This description and its specific examples are intended for purposes of illustration only. This invention, therefore, is not limited to the embodiments described in this patent application, and may be variously modified. Abbreviations and Definitions
Unless otherwise defined herein, scientific and technical terms used in connection with the present invention shall have the meanings that are commonly understood by those of ordinary skill in the art. The meaning and scope of the terms should be clear, however, in the event of any latent ambiguity, definitions provided herein take precedent over any dictionary or extrinsic definition. In this application, the use of "or" means "and/or" unless stated otherwise. Furthermore, the use of the term "including", as well as other forms, such as "includes" and "included", is not limiting. With reference to the use of the words "comprise" or "comprises" or "comprising" in this patent application (including the claims), Applicants note that unless the context requires otherwise, those words are used on the basis and clear understanding that they are to be interpreted inclusively, rather than exclusively, and that Applicants intend each of those words to be so interpreted in construing this patent application, including the claims below. For a variable that occurs more than one time in any substituent or in the compound of the invention or any other formulae herein, its definition on each occurrence is independent of its definition at every other occurrence. Combinations of substituents are permissible only if such combinations result in stable compounds. Stable compounds are compounds which can be isolated in a useful degree of purity from a reaction mixture. It is meant to be understood that proper valences are maintained for all combinations herein, that monovalent moieties having more than one atom are attached through their left ends, and that divalent moieties are drawn from left to right.
As used in the specification and the appended claims, unless specified to the contrary , the following terms have the meaning indicated:
The term "alkyl" (alone or in combination with another term(s)) means a straight-or branched-chain saturated hydrocarbyl substituent typically containing from 1 to about 10 carbon atoms; or in another embodiment, from 1 to about 8 carbon atoms; in another embodiment, from 1 to about 6 carbon atoms, and in another embodiment, from 1 to about 4 carbon atoms. Examples of such substituents include methyl, ethyl, n-propyl, isopropy l. n- butyl, isobutyl, sec-butyl, tert-butyl, pentyl. iso-amyl. and hexy l and the like.
The term "alkenyl" (alone or in combination with another term(s)) means a straight- or branched-chain hydrocarbyl substituent containing one or more double bonds and typically from 2 to about 10 carbon atoms; or in another embodiment, from 2 to about 8 carbon atoms; in another embodiment, from 2 to about 6 carbon atoms; and in another embodiment, from 2 to about 4 carbon atoms. Examples of such substituents include ethenyl (vinyl), 2-propenyl, 3-propenyl, 1,4-pentadienyl, 1,4-butadienyl, 1-butenyl, 2-butenyl, and 3-butenyl and the like.
The term "alkynyl" (alone or in combination with another term(s)) means a straight- or branched-chain hydrocarbyl substituent containing one or more triple bonds and typically from 2 to about 10 carbon atoms; or in another embodiment, from 2 to about 8 carbon atoms, in another embodiment, from 2 to about 6 carbon atoms: and in another embodiment, from 2 to about 4 carbon atoms. Examples of such substituents include ethynyl, 2-propynyI. 3- propynyl, 2-butynyl, and 3-butynyl and the like.
The term "carbocyclyl" (alone or in combination with another term(s)) means a saturated cyclic (i.e., "cycloalkyl"), partially saturated cyclic (i.e., "cycloalkenyl"), or completely unsaturated (i.e., "aryl") hydrocarbyl substituent containing from 3 to 14 carbon ring atoms ("ring atoms" are the atoms bound together to form the ring or rings of a cyclic substituent). A carbocyclyl may be a single-ring (monocyclic) or polycyclic ring structure.
A carbocyclyl may be a single ring structure, which typically contains from 3 to 8 ring atoms, more typically from 3 to 6 ring atoms, and even more typically 5 to 6 ring atoms. Examples of such single-ring carbocyclyls include cyclopropyl (cyclopropanyl), cyclobutyl (cyclobutanyl), cyclopentyl (cyclopentanyl), cyclopentenyl, cyclopentadienyl, cyclohexyl (cyclohexanyl), cyclohexenyl, cyclohexadienyl, and phenyl. A carbocyclyl may alternatively be polycyclic (i.e., may contain more than one ring). Examples of polycyclic carbocyclyls include bridged, fused, and spirocyclic carbocyclyls. In a spirocyclic carbocyclyl, one atom is common to two different rings. An example of a spirocyclic carbocyclyl is spiropentanyl. In a bridged carbocyclyl, the rings share at least two common non-adjacent atoms. Examples of bridged carbocyclyls include bicyclo[2.2.1 ]heptanyl, bicyclo[2.2.1 ]hept-2-enyl, and adamantanyl. In a fused-ring carbocyclyl system, two or more rings may be fused together, such that two rings share one common bond. Examples of two- or three-fused ring carbocyclyls include naphthalenyl, tetrahydronaphthalenyl (tetralinyl), indenyl, indanyl (dihydroindenyl), anthracenyl, phenanthrenyl, and decalinyl.
The term "cycloalkyi" (alone or in combination with another term(s)) means a saturated cyclic hydrocarbyl substituent containing from 3 to 14 carbon ring atoms. A cycloalkyi may be a single carbon ring, which typically contains from 3 to 8 carbon ring atoms and more typically from 3 to 6 ring atoms. Examples of single-ring cycloalky ls include cyclopropyl, cyclobutyl, cyclopentyl, and cyclohexyl. A cycloalkyi may alternatively be polycyclic or contain more than one ring. Examples of polycyclic cycloalkyls include bridged, fused, and spirocyclic carbocyclyls.
The term "aryl" (alone or in combination with another term(s)) means an aromatic carbocyclyl containing from 6 to 14 carbon ring atoms. An aryl may be monocyclic or polycyclic (i.e., may contain more than one ring). In the case of polycyclic aromatic rings, only one ring the polycyclic system is required to be unsaturated while the remaining ring(s) may be saturated, partially saturated or unsaturated. Examples of aryls include phenyl, naphthalenyl, indenyl, indanyl, and tetrahydronapthyl.
In some instances, the number of carbon atoms in a hydrocarb l substituent (e.g., alkyl, alkenyl, alkynyl, or cycloalkyi) is indicated by the prefix "Cx-Cy-", wherein x is the minimum and y is the maximum number of carbon atoms in the substituent. Thus, for example, "Ci -Ce-alkyl" refers to an alkyl substituent containing from 1 to 6 carbon atoms.
Illustrating further, C3-Crcycloalkyl means a saturated hydrocarbyl ring containing from 3 to 8 carbon ring atoms.
The term "hydrogen" (alone or in combination with another term(s)) means a hydrogen radical, and may be depicted as -H.
The term "hydroxy" (alone or in combination with another term(s)) means -OH.
The term "carboxy" (alone or in combination with another term(s)) means -C(0)-OH.
The term "amino" (alone or in combination with another term(s)) means -NH2.
The term "halogen" or "halo" (alone or in combination with another term(s)) means a fluorine radical (which may be depicted as -F), chlorine radical (which may be depicted as - CI), bromine radical (which may be depicted as -Br), or iodine radical (which may be depicted as -I).
If a substituent is described as being "substituted", a non-hydrogen radical is in the place of hydrogen radical on a carbon or nitrogen of the substituent. Thus, for example, a substituted alkyl substituent is an alkyl substituent in which at least one non-hydrogen radical is in the place of a hydrogen radical on the alkyl substituent. To illustrate, monofluoroalkyi is alkyl substituted with a fluoro radical, and difluoroalkyl is alkyl substituted with two fluoro radicals. It should be recognized that if there are more than one substitution on a substituent, each non-hydrogen radical may be identical or different (unless otherwise stated).
If a substituent is described as being "optionally substituted", the substituent may be either (1) not substituted or (2) substituted. If a substituent is described as being optionally substituted with up to a particular number of non-hydrogen radicals, that substituent may be either (1) not substituted; or (2) substituted by up to that particular number of non-hydrogen radicals or by up to the maximum number of substitutable positions on the substituent, whichever is less. Thus, for example, if a substituent is described as a heteroaryl optionally substituted with up to 3 non-hydrogen radicals, then any heteroaryl with less than 3
substitutable positions would be optionally substituted by up to only as many non-hydrogen radicals as the heteroaryl has substitutable positions. To illustrate, tetrazolyl (which has only one substitutable position) would be optionally substituted with up to one non-hydrogen radical. To illustrate further, if an amino nitrogen is described as being optionally substituted with up to 2 non-hydrogen radicals, then a primary amino nitrogen will be optionally substituted with up to 2 non-hydrogen radicals, whereas a secondary amino nitrogen will be optionally substituted with up to only 1 non-hydrogen radical.
This patent application uses the terms "substituent" and "radical" interchangeably . The prefix "halo" indicates that the substituent to which the prefix is attached is substituted with one or more independently selected halogen radicals. For example, haloalkyl means an alkyl substituent in which at least one hydrogen radical is replaced with a halogen radical. Examples of haloalkyls include chloromethyl, 1 -bromoethyl, fluoromethyl, difluoromethyl, trifluoromethyl, and 1 , 1 , 1-trifluoroethyl. It should be recognized that if a substituent is substituted by more than one halogen radical, those halogen radicals may be identical or different (unless otherwise stated).
The prefix "perhalo" indicates that every hydrogen radical on the substituent to which the prefix is attached is replaced with independently selected halogen radicals, i.e., each hydrogen radical on the substituent is replaced with a halogen radical. If all the halogen radicals are identical, the prefix typically will identify the halogen radical. Thus, for example, the term "perfluoro" means that every hydrogen radical on the substituent to which the prefix is attached is substituted with a fluorine radical. To illustrate, the term
"perfluoroalkyl" means an alkyl substituent wherein a fluorine radical is in the place of each hydrogen radical.
The term "carbonyl" (alone or in combination with another term(s)) means -C(O)-.
The term "aminocarbonyl" (alone or in combination with another term(s)) means - C(0)-NH2.
The term "oxo" (alone or in combination with another term(s)) means (=0).
The term "oxy" (alone or in combination with another term(s)) means an ether substituent, and may be depicted as -0-.
The term "alk lhydroxy" (alone or in combination with another term(s)) means - alkyl-OH.
The term "alkylamino" (alone or in combination with another term(s)) means -alkyl- NH2.
The term "alkyloxy" (alone or in combination with another term(s)) means an alkylether substituent, i.e., -O-alkyl. Examples of such a substituent include methoxy (-0- CH3), ethoxy, n-propoxy, isopropoxy. n-butoxy. iso-butoxy, sec-butoxy, and tert-butoxy.
The term "alkylcarbonyl" (alone or in combination with another term(s)) means - C(0)-alkyl.
The term "aminoalkylcarbonyl" (alone or in combination with another term(s)) means -C(0)-alkyl-NH2.
The term "alkyloxycarbonyl" (alone or in combination with another term(s)) means - C(0)-0-alky l.
The term "carbocyclylcarbonyl" (alone or in combination with another term(s)) means
-C (0)-c arbocy cly 1.
Similarly, the term "heterocyclylcarbonyl" (alone or in combination with another term(s)) means -C(0)-heterocyclyl.
The term "carbocyclylalkylcarbonyl" (alone or in combination with another term(s)) means -C(0)-alkyl-carbocyclyl.
Similarly, the term "heterocyclylalkylcarbonyl" (alone or in combination with another term(s)) means -C(0)-alkyl-heterocyclyl.
The term "carbocyclylo ycarbom 1" (alone or in combination w ith another term(s)) means -C(0)-0-carbocyclyl. The term "carbocyclylall y loxycarbonyl" (alone or in combination with another term(s)) means -C(0)-0-alkyl-carbocyclyl.
The term "thio" or "thia" (alone or in combination with another term(s)) means a thiaether substituent, i.e., an ether substituent wherein a divalent sulfur atom is in the place of the ether oxygen atom. Such a substituent may be depicted as -S-. This, for example, "alky 1- thio-alkyl" means alkyl-S-alkyl (alkyl-sulfanyl-alkyl).
The term "thiol" or "sulfhydryl" (alone or in combination with another term(s)) means a sulfhydryl substituent, and may be depicted as -SH.
The term "(thiocarbonyl)" (alone or in combination with another term(s)) means a carbonyl wherein the oxygen atom has been replaced with a sulfur. Such a substituent may be depicted as -C(S)-.
The term "sulfonyl" (alone or in combination with another term(s)) means -S(0)2-. The term "aminosulfonyl" (alone or in combination with another term(s)) means - S(0)2-NH2.
The term "sulfinyl" or "sulfoxido" (alone or in combination with another term(s)) means -S(O)-.
The term "heterocyclyl" (alone or in combination with another term(s)) means a saturated (i.e.. "heterocycloalkyl"), partially saturated (i.e., "heterocycloalkenyl"), or completely unsaturated (i.e., "heteroaryl") ring structure containing a total of 3 to 14 ring atoms. At least one of the ring atoms is a heteroatom (i.e., oxygen, nitrogen, or sulfur), with the remaining ring atoms being independently selected from the group consisting of carbon, oxygen, nitrogen, and sulfur. A heterocyclyl may be a single-ring (monocyclic) or polycyclic ring structure.
A heterocyclyl may be a single ring, which typically contains from 3 to 7 ring atoms, more typically from 3 to 6 ring atoms, and even more typically 5 to 6 ring atoms. Examples of single-ring heterocyclyls include furanyl. dihydrofuranyl. tetrahydrofuranyl, thiophenyl (thiofuranyl). dihydrothiophenyl, tetrahydrothiophenyl, pyrrolyl. pyrrolinyl, pyrrolidinyl, imidazolyl, imidazolinyl, imidazolidinyl, pyrazolyl, pyrazolinyl, pyrazolidinyl, triazolyl, tetrazolyl, oxazolyl, oxazolidinyl, isoxazolidinyl, isoxazolyl, thiazolyl, isothiazolyl, thiazolinyl, isothiazolinyl, thiazolidinyl, isothiazolidinyl, thiodiazolyl, oxadiazolyl (including 1 ,2,3-oxadiazolyl, 1 ,2,4-oxadiazolyl, 1 ,2, 5 -oxadiazolyl (furazanyl), or 1 ,3,4-oxadiazolyl), oxatriazolyl (including 1 ,2,3,4-oxatriazolyl or 1 ,2.3,5-oxatriazolyl), dioxazolyl (including 1 ,2,3-dioxazolyl, 1 ,2,4-dioxazolyl, 1 ,3,2-dioxazolyl, or 1 ,3,4-dioxazolyl), oxathiazolyl, oxathiolyl, oxathiolanyl, pyranyl. dihydropyranyl. thiopyranyl, tetrahydrothiopyranyl. pyridinyl (azinyl), piperidinyl, diazinyl (including pyridazinyl (1,2-diazinyl), pyrimidinyl ( 1 ,3-diazinyl), or pyrazinyl (1 ,4-diazinyl)), piperazinyl. triazinyl (including 1 ,3, -triazinyl, 1.2,4-triazinyl. and 1.2,3-triazinyl)), oxazinyl (including 1 ,2-oxazinyl, 1 ,3-oxazinyl, or 1.4- oxazinyl)), oxathiazinyl (including 1 ,2,3-oxathiazinyl, 1.2,4-oxathiazinyl, 1 ,2,5-oxathiazinyl, or 1 ,2,6-oxathiazinyl)), oxadiazinyl (including 1 ,2,3-oxadiazinyl, 1 ,2,4-oxadiazinyl, 1 ,4.2- oxadiazinyl, or 1 ,3, 5 -oxadiazinyl)). morpholinyl. azepinyl. oxepinyl, thiepinyl, and diazepinyl.
A heterocyclyl may alternatively be polycyclic (i.e., may contain more than one ring). Examples of polycyclic heterocyclyls include bridged, fused, and spirocyclic heterocyclyls. In a spirocyclic heterocyclyl, one atom is common to two different rings. In a bridged heterocycly l, the rings share at least two common non-adjacent atoms. In a fused-ring heterocyclyl, two or more rings may be fused together, such that two rings share one common bond. Examples of fused ring heterocyclyls containing two or three rings include indolizinyl. pyranopyrrolyl, 4H-quinolizinyl, purinyl, naphthyridinyl, pyridopyridinyl (including pyrido[3,4-b]-pyridinyl, pyrido[3,2-b]-pyridinyl, or pyrido[4,3-b] -pyridinyl), and pteridinyl. Other examples of fused-ring heterocyclyls include benzo-fused heterocyclyls, such as indolyl, isoindolyl (isobenzazolyl, pseudoisoindolyl), indoleninyl (pseudoindolyl), isoindazolyl (benzpyrazolyl), benzazinyl (including quinolinyl (1-benzazinyl) or isoquinolinyl (2 -benzazinyl)), phthalazinyl, quinoxalinyl, quinazolinyl, benzodiazinyl (including cinnolinyl ( 1 ,2-benzodiazinyl) or quinazolinyl (1 ,3-benzodiazinyl)). benzopyranyl (including chromanyl or isochromanyl), benzoxazinyl (including 1 ,3,2-benzoxazinyl. 1.4,2- benzoxaziny l, 2.3.1 -benzoxazinyl. or 3.1.4-benzoxazinyl). and benzisoxaziny l (including 1 ,2- benzisoxazinyl or 1 ,4-benzisoxazinyl).
The term "heterocycloalkyl" (alone or in combination with another term(s)) means a saturated heterocyclyl.
The term "heteroaryl" (alone or in combination with another term(s)) means an aromatic heterocyclyl containing from 5 to 14 ring atoms. A heteroaryl may be a single ring or 2 or 3 fused rings. Examples of heteroaryl substituents include 6-membered ring substituents such as pyridyl, pyrazyl, pyrimidinyl. pyridazinyl, and 1 ,3,5-, 1 ,2,4- or 1 ,2,3- triazinyl; 5-membered ring substituents such as imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, 1,2,3-, 1 ,2,4-, 1 ,2,5-, or 1 ,3,4-oxadiazolyl and isothiazolyh 6/5-membered fused ring substituents such as benzothiofuranyl, benzisoxazolyl, benzoxazolyl, purinyl, and anthranilyl; and 6/6-membered fused rings such as benzopyranyl, quinolinyl, isoquinolinyl, cinnolinyl, quinazolinyl, and benzoxazinyl. A prefix attached to a multi-component substituent only applies to the first component. To illustrate, the term "alkylcycloalkyl" contains two components: alkyl and cycloalkyl. Thus, the Ci -C6- prefix on CpCe-alkylcycloalkyl means that the alkyl component of the alkylcycloalkyl contains from 1 to 6 carbon atoms; the Ci-C6-prefix does not describe the cycloalkyl component. To illustrate further, the prefix "halo" on haloalkyloxyalkyl indicates that only the alkyloxy component of the alkyloxyalkyl substituent is substituted with one or more halogen radicals. If halogen substitution may alternatively or additionally occur on the alkyl component, the substituent would instead be described as "halogen- substituted alkyloxyalkyl" rather than "haloalkyloxyalkyl." And finally, if the halogen substitution may only occur on the alkyl component, the substituent would instead be described as "alkyloxyhaloalkyl. "
The terms "treat", "treating" and "treatment" refer to a method of alleviating or abrogating a disease and/or its attendant symptoms.
The terms "prevent", "preventing" and "prevention" refer to a method of preventing the onset of a disease and/or its attendant symptoms or barring a subject from acquiring a disease. As used herein, "prevent", "preventing" and "prevention" also include delaying the onset of a disease and/or its attendant symptoms and reducing a subject's risk of acquiring a disease.
The term "therapeutically effective amount" refers to that amount of the compound being administered sufficient to prevent development of or alleviate to some extent one or more of the symptoms of the condition or disorder being treated.
The term "modulate" refers to the ability of a compound to increase or decrease the function, or activity, of a kinase. "Modulation", as used herein in its various forms, is intended to encompass antagonism, agonism, partial antagonism and/or partial agonism of the activity associated with kinase. Kinase inhibitors are compounds that, e.g., bind to, partially or totally block stimulation, decrease, prevent, delay activation, inactivate, desensitize, or down regulate signal transduction. Kinase activators are compounds that, e.g., bind to, stimulate, increase, open, activate, facilitate, enhance activation, sensitize or up regulate signal transduction.
The term "composition" as used herein is intended to encompass a product comprising the specified ingredients in the specified amounts, as well as any product which results, directly or indirectly, from combination of the specified ingredients in the specified amounts. By "pharmaceutically acceptable" it is meant the carrier, diluent or excipient must be compatible with the other ingredients of the formulation and not deleterious to the recipient thereof.
The "subject" is defined herein to include animals such as mammals, including, but not limited to, primates (e.g., humans), cows, sheep, goats, horses, dogs, cats, rabbits, rats, mice and the like. In preferred embodiments, the subject is a human.
Compounds
Embodiments of Formula (I)
In one embodiment, the present invention is directed, in part, to a class of compounds having a structure of Formula I
Figure imgf000012_0001
Formula (I) wherein
' is
Figure imgf000012_0002
Y is CH or ;
wherein at least one of X and Y is N;
A is phenyl, naphthy l. indenyl. C3.X cycloalkyl. 4-7 membered heterocycloalkyl, 5-7 membered heterocycloalkenyl, or 5-7 membered heteroaryl;
B is (a) phenyl, naphthyl. tetrahydronaphthyl, indenyl. or indanyl, wherein the phenyl, naphthyl, tetrahydronaphthyl, indenyl. or indanyl is optionally susbstituted w ith one. tw o. three, or four R2 and is substituted with R3; or
(b) 5-16 membered monocyclic, bicyclic, or tricyclic heterocyclyl, wherein the heterocyclyl is optionally substituted with one, two, three, four, or five R4;
Z is a bond, Ci-e alkylene, C2-6 alkenylene, -O- or -NR5(CH2)P-;
R1. at each occurrence, is independently selected from the group consisting of halo. CN. N02, Ci-6-alkyl, C|.6-haloalk l, aryl, C3-8 cycloalky 1, heteroaryl. heterocycloalkyl, OR6, SR6. C(0)R6, C(0)NR7R8, C(0)OR6, OC(0)R6, OC(0)NR7R8, NR7R8, NR7C(0)R6. S(0)R6. S(0)NR7R8, S(0)2R6. NR7S(0)2R6, and S(0)2NR7R8; wherein the C3-8 cycloalky 1, aryl, heterocycloalkyl, and heteroaryl are optionally substituted with 1 , 2, or 3 substituents independently selected from halo, Ci -6 alkyl, Ci-6 haloalkyl, CN. N(¾, ORA, SRA, C(0)RA, C(0)NRBRC, C(0)ORA, OC(0)RA, OC(0)NRBRC, NRBRC, NRbC(0)RA, S(0)RA, S(0)NRBRC. S(0)2RA, NRBS(0)2RA, and S(0)2NRBRC;
R2, at each occurrence, is independently selected from the group consisting of halo, CN. OH, Ci-6 alkyl, Ci.6-haloalkyl, Ci.6 alkoxy,
Figure imgf000013_0001
haloalkoxy, Ci.6-thioalkoxy, amino, C ,.6 alky lamino, and Ci-6 dialkylamino;
R3 is selected from the group consisting of aryl, C3.g cycloalky 1, heteroaryl, heterocycloalkyl, aryl-Ci-6-alkyl-, C3-8 cycloalkyl-Ci -6-alkyl-, heteroaryl-Ci-6-alkyl-, heterocycIoalkyl-C.6-alkyl-, OR9, C(0)R9, -C,.6-alkyI-C(0)R9, C(O)NR10RN , C(0)OR9, OC(0)R9, OC(0)NR'°RU , NR10RN , NR10C(0)R9, S(0)R9, S(0)NR10R" , S(0)2R9,
NRL 0S(O)2R9, and S(O)2NR 10RN . wherein the C3.8 cycloalkyl, aryl. heterocycloalkyl. and heteroaryl, alone or part of another moiety, are optionally substituted with one, two. or three
R12;
R4 is CN, N02, halo, C,.6-alkyl, C,.6-haloalkyl, ORd, SRd, C(0)Rd, C(0)NReRr, C(0)ORd, NReRf, NReC(0)Rd, S(0)2Rd, NReS(0)2Rd, or S(0)2NReRf;
R5 is H or Ci.6-alkyl; R6, R7. and R8, at each occurrence, are independently selected from H, Ci-6 alkyl, Ci. 6 haloalkyl, ary l, C3-8 cycloalkyl. heteroaryl. and heterocycloalkyl, wherein the aryl, C3-8 cycloalkyl, heteroaryl, and heterocycloalkyl moiety are optionally substituted with 1 , 2, or 3 substituents independently selected from halo, CN, OH, C1.6 alkyl, Ci.6-haloalky l. Ci-6 alkoxy, Ci-β haloalkoxy, amino, Ci 6 alkylamino, Ci-e dialkylamino, C(0)OH, C(O) Ci-6 alkyl. C(0)NH2, C(0)NH(C,.6 alkyl). or C(0)N(C,.6 alkyl)2;
R9, R10, and Rn , at each occurrence, are independently selected from H, C1.6 alkyl, Ci. 6 haloalkyl, heteroaryl-Ci-6-alkyl-, heterocycloalkyl-Ci-6-alkyl-, RI 3R14N-Ci-6-alkyl-, aryl, C3- !< cycloalkyl heteroaryl, and heterocycloalkyl, wherein the aryl, C3-8 cycloalkyl, heteroaryl, and heterocycloalkyl, alone or as part of another moiety, are optionally substituted with 1 , 2, or 3 substituents independently selected from halo, CN, OH, Q.e alkyl, Ci-6-haloalkyl, C1.6 alkoxy, C1.6 haloalkoxy, amino, C1.6 alkylamino, Ci_6 dialkylamino, C(0)OH, C(O) Ci_6 alkyl, C(0)NH2, C(0)NH(C, -6 alkyl), or C(0)N(C,.6 alkyl)2;
R12, at each occurrence, is independently selected from the group consisting of halo, Ci-6 alkyl, Ci-6 haloalkyl, amino-d-6-alkyl-. Ci.6 alkylamino-Ci.6 alkyl-, Ci-6 dialkylamino-Ci- 6 alkyl-, hydrox -Ci.e-alkyl-.
Figure imgf000014_0001
alky 1-Ci .6 alkoxy, aryl, C3.8 cycloalkyl, heteroaryl, heterocycloalkyl, aryl-(Ci_6 alkyl)-, C .8 cycloalkyl-(Ci.6 alkyl)-, heteroaryl-(Ci_6 alkyl)-, heterocycloalkyl-(Ci-6 alkyl)-. CN, N02, OR . SRB. C(0)R , C(0)NRhR', C(0)ORB,
OC(0)R8, OC(0)NRhR', NRhR', NRhC(0)RB, S(0)R8, S(0)NRhR'. S(0)2RB, NRhS(0)2Rs, and S(0)2NRhR', wherein the aryl, C3.8 cycloalkyl, heteroaryl, and heterocycloalkyl. alone or as part of another moiety, are optionally substituted with one, two or three substituents independently selected from halo and
Figure imgf000014_0002
alkyl;
R13 and R14, at each occurrence, are independently selected from the group consisting of H, C]_6 alkyl, aryl, C3.g cycloalkyl, heteroaryl, and heterocycloalkyl; wherein the C].6-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, C|.6-alkoxy, -NH2, -NHCi.6-alkyl, and -N(Ci.6-alkyl)2, and wherein the ar l. C3.8 cycloalkyl, heteroaryl, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, Ci-6-alkyl, Ci.6-haloalkyl, C1.6- hydroxyalkyl, hydroxy, oxo, Ci.6-alkoxy, C].6-haloalkoxy, -NH2, -NH(C).6-alkyl), and N(Ci. 6-alkyl)2; R\ at each occurrence, is independently selected from the group consisting of H, Ci.6 alkyl, aryl, C3-8 cycloalkyl, heteroaryl, and heterocycloalkyl, wherein the Ci-6-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, Ci-6-alkoxy, -NH2, -NHCi.6-alkyl, and -N(C] .6-alkyl)2, and wherein the aryl, C3.8 cycloalkyl, heteroaryl, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo. Ci ^-alkyl, Ci-6-haloalkyl, C1.6- hydroxyalkyl, hydroxy, oxo, Ci e-alkoxy, Ci-e-haloalkoxy , -NH2. -NH(Ci 6-alkyl), and N(C i- 6-alkyl)2; Rb and Rc, at each occurrence, are independently selected from the group consisting of
H, Ci.6 alkyl, aryl, C3„8 cycloalkyl, heteroaryl, and heterocycloalkyl; wherein the Ci.6-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, C].6-alkoxy, -NH2. -NHC].6-alkyl, and -N(Ci_6-alkyl)2, and wherein the aryl, C;,.8 cycloalkyl. heteroaryl. or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, C 1.6— alkyl, C i Hialoalkyl, C1.6- hydroxyalkyl, hydroxy, oxo, C i.e-alkoxy, Ci.6-haloalkoxy, -NH2, -NH(Ci.6-alkyl), and N(C i . 6-alkyl)2;
Rd, at each occurrence, is independently selected from the group consisting of H, C1.6 alkyl, aryl, C3-8 cycloalkyl, heteroaryl, and heterocycloalkyl; wherein the Ci-e-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, C ue-alkoxy, -NH , -NHC i-6-alkyl, and -N(C| .6-alkyl)2. and wherein the aryl. C3-H cycloalkyl. heteroary l, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, C |.6-alkyl. Ci.f-haloalkyl, C1.6- hydroxyalkyl, hydroxy, oxo, Ci -6-alkoxy, Ci-6-haloalkoxy, -NH2, -NH(Ci 6-alkyl), and N(C i . 6-alkyl)2;
Re and Rf, at each occurrence, are independently selected from the group consisting of H, Ci-6 alkyl, aryl, C3.8 cycloalkyl, heteroaryl, and heterocycloalkyl; wherein the C].6-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, Ci-6-alkoxy, -NH2, -NHCi-e-alkyl, and -N(Ci.6-alkyl)2, and wherein the aryl, C3.8 cycloalkyl. heteroaryl, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, C i -6— alkyl, C i.e-haloalkyl, C\.e- hydroxyalkyl, hydroxy, oxo, Ci.6-alkoxy, C].6-haloalkoxy, -NH2, -NH(Ci_6-alkyl), and N(Ct. 6-alkyl)2;
R , at each occurrence, is independently selected from the group consisting of H, C 1.6 alkyl. aryl, C3.8 cvcloalkyl, heteroary l, and heterocvcloalkyl; wherein the Ci.e-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy. C i-6-alkoxy, -NH2. -NHCi-6-alk l, and -N(Ci-6-alkyl)2, and wherein the aryl. C3-H cycloalkyl, heteroarv'l, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, Ci-6-alkyl, Ci-6-haloalkyl. Ci-e— hydroxyalkyl, hydroxy, oxo, Ci-6-alkoxy, C] .6-haloalkoxy, -NH2, -NH(C] .6-alkyl), and N(Ci_ 6-alk l)2;
Rh and R', at each occurrence, are independently selected from the group consisting of H, Ci-6 alkyl, aryl, C3.8 cycloalkyl. heteroaryl, and heterocycloalkyl; wherein the Ci-6-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, C| .6-alkoxy, -NH2, -NHCi-6-alkyl, and -N(Ci.6-alkyl)2. and wherein the aryl, C3-8 cycloalkyl, heteroaryl. or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, Ci_6-alkyl, C|.6-haloalkyl, C1.6- hydroxyalkyl, hydroxy, oxo, Ci_6-alkoxy, Ci.e-haloalkoxy, -NH2, -NH(Ci_6-alkyl), and N(C]. 6-alkyl)2; n is 0, 1 , 2, or 3; and p is 0, 1 , 2, or 3; or a pharmaceutically acceptable salt or solvate thereof.
In one embodiment of formula (I), G is
Figure imgf000016_0001
In another embodiment of formula (I), G is
Figure imgf000017_0001
In another embodiment of formula (I), G is
Figure imgf000017_0002
In one embodiment of formula (I), X is N; and Y is CH. In another embodiment of formula (I), X is CH; and Y is N. In another embodiment of formula (I). X is N; and Y is N.
embodiment of formula (I), G1 is X is CH; and Y is
N. In another embodiment of formula (I), G is
Figure imgf000017_0003
X is CH; and Y is N.
In another embodiment of formula (I), G X is N; and Y is N. In
another embodiment of formula (I), G is
Figure imgf000018_0001
X is N: and Y is CH.
In one embodiment of formula (I), Z is Ci-6 alkylene. In another embodiment of formula (I), Z is -CH2-, -CH2CH2-, -CH2CH2CH2-, or -CH2CH2CH2CH2-. In another embodiment of formula (I), Z is -CH(CH3)-, -CH2CH(CH3)-, -CH(CH3)CH2-,
-CH(CH3)CH2CH2-, -CH2CH(CH3)CH2-, -CH2CH2CH(CH3)-. -C(CH3)2-, -CH2C(CH3)2-, -C(CH3)2CH2-, -CH2CH2C(CH3)2-, -CH2C(CH3)2CH2-, or -C(CH3)2CH2CH2-. In another embodiment of formula (I), Z is CH(CH2CH3)-, -CH2CH(CH2CH3)-, -CH(CH2CH3)CH2-, -CH(CH2CH3)CH2CH2-, -CH2CH(CH2CH3)CH2-, -CH2CH2CH(CH2CH3)-, -C(CH2CH3)2-, -CH2C(CH2CH3)2-, -C(CH2CH3)2CH2-, -CH2CH2C(CH2CH3)2-, -CH2C(CH2CH3)2CH2-. or -C(CH2CH3)2CH2CH2-. In yet another embodiment of formula (I). Z is -CH2-, -CH2CH2-. -CH(CH3)-. or -C(CH3)2-. In yet another embodiment of formula (I). Z is -CH2-.
In another embodiment of formula (I), Z is C2.6 alkenylene. In yet another embodiment of formula (I), Z is -CH=CH-, -CH2CH2=CH-, -CH=CHCH2-,
-CH2-CH=CH-CH2-, -CH=CH- CH2CH2-, or -CH2CH2-CH=CH-. In another embodiment of formula (I), Z is -CH(=CH2)-, -CH2CH(=CH2)-, -CH(=CH2)CH2-, or -CH(=CHCH3)-. In yet another embodiment of formula (I). Z is -CH=CH- or -CH(=CH2)-.
In one embodiment of formula (I). Z is a bond.
In another embodiment of formula (I), Z is NR.5, wherein Rs is H or C |.6 alky 1.
In one embodiment of formula (I), A is phenyl, naphthyl, indenyl or C3.s cycloalkyl.
In yet another embodiment of formula (I), A is phenyl.
In another embodiment of formula (I), A is a 5-7 membered heterocycloalkyl or heterocycloalkenyl. In another embodiment of formula (I), A is pyrrolidinyl, tetrahydrofuryl, tetrahydrothienyl, imidazolidinyl, pyrazolidinyl, piperidinyl, tetrahydropyranyl, piperazinyl, dioxanyl, morpholinyl, 2-oxopyrrolidinyl, 2,5-dioxopyrrolidinyl, 2-oxopiperidinyl, 4- oxopiperidinyl, or 2,6-dioxopiperidinyl. In yet another embodiment of formula (I), A is dihydrofuranyl, dihydrothiophenyl, pyrrolinyl, imidazolinyl. pyrazolinyl, thiazolinyl, isothiazolinyl. dihydropyranyl. oxathiazinyl. oxadiazinyl. or oxazinyl.
In one embodiment of formula (I), A is a 5-7 membered heteroaryl. In another embodiment of formula (I), A is pyridyl, pyrazyl, pyridinyl, pyrimidinyl, pyridazinyl, 1 ,3,5-, 1 ,2,4- or 1 ,2,3-triazinyl, imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, 1 ,2,3-, 1,2,4-, 1 ,2,5-, or 1 ,3,4-oxadiazolyl, or isothiazolyl.
In one embodiment of formula (I), A is optionally substituted with -(R')N, wherein n is 0, 1 , 2, or 3. In one embodiment of formula (I), R1 , at each occurrence, is independently selected from the group consisting of halo, CN, N02, Ci-6-alkyl, Ci.6-haloalkyl, aryl, C3-8 cycloalkyl. heteroaryl. heterocycloalkyl, OR6, SR6, C(0)R6, C(0)NR7R8. C(0)OR6.
OC(0)R6. OC(0)NR7R8, NR7R8, NR7C(0)R6. S(0)R6, S(0)NR7Rs, S(0)2R6, NR7S(0)2R6, and S(0)2NR7R8; wherein the C¾.K cycloalkyl, aryl, heterocycloalkyl, and heteroaryl are optionally substituted with 1 , 2, or 3 substituents independently selected from halo, C alkyl. CM haloalkyl, CN, N02, OR\ SR\ C(0)Ra, C(0)NRbRc, C(0)ORa, OC(0)Ra. OC(0)NRbRc. NRbRc, NRBC(0)Ra, S(0)Ra, S(0)NRbRc, S(0)2Ra, NRbS(0)2Ra, and S(0)2NRbRc.
In another embodiment of formula (I), A is phenyl, n is 2, and R1, at each occurrence, is halo.
In one embodiment of formula (I), B is phenyl. In another embodiment of formula (I), B is phenyl and is unsubstituted with R2. In another embodiment, the phenyl is substituted with one or two R2, and R2 is halo, Ci-6-alkyl, C M haloalkyl, or OR6.
In one embodiment of formula (I), B is phenyl, wherein the phenyl is substituted with R3, and R3 is heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one, two, or three R12; wherein R12 is halo, Ci.e-alkyl, or C|.6-haloalkyl. In yet another embodiment, phenyl is substituted with heterocycloalkyl, and heterocycloalky is selected from the group consisting of azetidinyl, pyrrolidinyl, piperidinyl, morpholinyl, piperazinyl, azepanyl, diazepanyl, and hexahydropyrrolo[ l,2-a]pyrazin-2(l H)yl.
In one embodiment of formula (I), B is
Figure imgf000020_0001
wherein R2 and R3 are as defined above and m is 0, 1 , or 2. In another embodiment of formula (I), m is 0. In another embodiment of formula (I), m is 1 , and R2, at each occurrence, is independently selected from the group consisting of halo, CN, OH, CM alk l, C1.4- haloalkyl, Ci.4 alkoxy, Ci_4haloalkoxy, Ci-4-thioalkoxy, amino, C).4 alkylamino, and C1.4 dialkylamino. In yet another embodiment of formula (I), m is 1 and R2 is selected from the group consisting of halo, and Ci.4 alkoxy. In another embodiment of formula (I), R3 is selected from the group consisting aryl, C3 8 cycloalkyl. heteroaryl, heterocycloalkyl, aryl-C). 6-alkyl-, C x cycloalkyl-Ci-e-alkyl-, heteroaryl-Ci-6-alkyl-, heterocycloalkyl-Ci-6-alkyl-, OR9, C(0)R9, C(O)NRl0Rn , C(0)OR9, OC(0)R9, OC(O)NR10RH, NR' °R" . NR10C(O)R9, S(0)R9, S(0)NRinRH , S(0)2R9, NR10S(O)2R9. and S(O)2NR10Rn , wherein the C3.s cycloalkyl, aryl, heterocycloalkyl, and heteroaryl, alone or part of another moiety, are optionally substituted with one, two, or three R12, wherein R12 is defined above. In yet another embodiment of formula (I), B is phenyl, and R3 is heterocycloalkyl. In yet another embodiment of formula (I), R3 is heterocycloalkyl. In yet another embodiment of formula (I), R3 is heterocycloalkyl, which is optionally substituted with one R12, and R12 is selected from the group consisting of halo, Ci-4 alkyl. C1.4 haloalkyl, amino-Ci.4-alkyl-. Ci.4 alkylamino-C i-4 alkyl-, C 1.4
dialkylamino-Ci.4 alkyl-, hydroxy -Ci.4-alkyl-, C alkyl-Ci.4 alkoxy, aryl, C3.s cycloalkyl, heteroaryl, heterocycloalkyl, aryl-(Ci-2 alkyl)-, C3.s cycloalkyl-(Ci-2 alkyl)-, heteroaryl-(Ci_2 alkyl)-, heterocycloalkyl-(C,.2 alkyl)-, CN, N02, OR8, SRg, C(0)R8, C(0)NRhR', C(0)OR8, OC(0)Rg, OC(0)NRhR', NRhR', NRhC(0)R', S(0)Rg, S(0)NRhR', S(0)2Rg, NRhS(0)2Rg, and S(0)2NRhR', wherein the aryl, C3-8 cycloalkyl, heteroaryl, and heterocycloalkyl, alone or as part of another moiety, are optionally substituted with one, two or three substituents independently selected from halo and CM alkyl; and wherein R6, Rh, and R' are as defined above.
In another embodiment of formula (I). B is
Figure imgf000021_0001
wherein R2 is halo. Ci -alkyl, Ci haloalkyl, or OR6; p is 0 or 1 . R12 is Ci -alkyl. Ci e- haloalkyl, OR8, C(0)Rg, C(0)NRhR', C(0)ORB, NRhR', NRhC(0)R8, S(0)2R8. or
S(0)2NRhR'; and q is 0 or 1 .
la (I),
Figure imgf000021_0002
halo, Ci e-alkyl, Ci.e haloalkyl, or OR6; and p is 0, 1 , or
In one embodiment of formula (I). B is a 4-8 membered monocyclic heterocvclyl. In another embodiment, B is a 4-8 membered heterocvcloalkvi or heterocvcloalkenvl. In another embodiment. B is a 5-7 membered heteroaryl. In yet another embodiment of formula (I), B is pyrrolidinyl, tetrahydrofuryl, tetrahydrothienyl, imidazolidinyl, pyrazolidinyl, piperidinyl, tetrahydropyranyl, piperazinyl, dioxanyl, morpholinyl, 2-oxopyrrolidinyl, 2,5- dioxopyrrolidinyl, 2-oxopiperidinyl, 4-oxopiperidinyl, or 2,6-dioxopiperidinyl. In yet another embodiment of formula (I), B is pyridyl, pyrazyl, pyridinyl, pyrimidinyl, pyridazinyl, 1 ,3,5-, 1 ,2,4- or 1 ,2,3-triazinyl, imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, 1 ,2,3-, 1 ,2,4-, 1 ,2,5-, or 1,3,4-oxadiazolyl, or isothiazolyl. In one embodiment, B is unsubstituted. In another embodiment, B is substituted with one, two. or three R4. and R4 is halo, Ci 6-alkyl. C,.6-haloalkyl. ORd. C(0)Rd. C(0)ORd. NReR'. or S(0)2Rd.
In one embodiment of formula (I). B is a 7-1 1 membered bicyclic heterocyclyl. In another embodiment, B is a 7- 1 1 membered bicyclic heterocycloalkyl or bicyclic heterocyloalkenyl. In another embodiment, B is a 7-1 1 membered bicyclic heteroaryl. In yet another embodiment, B is 2,3-dihydro-2-oxo-lH-indolyl, benzothiazolyl, benzoxazolyl, benzothienyl, quinuclidinyl, quinolinyl, quinolinyl-N-oxide, tetrahydroisoquinolinyl, isoquinolinyl, benzimidazolyl, benzopyranyl, indolizinyl, benzofuryl, chromonyl, coumarinyl, cinnolinyl, quinoxalinyl, indazolyl, pyrrolopyridyl. furopyridinyl,
dihydroisoindolyl. dihydroquinazolinyl, 3.4-dihydro-4-oxo-quinazolinyl. benzisothiazolyl. benzisoxazolyl, benzodiazinyl, benzofurazanyl. benzothiopyranyl, benzotriazolyl.
benzpyrazolyl. 1.3-benzodioxolyl. dihydrobenzofuryl. dihydrobenzothienyl,
dihydrobenzothiopyranyl, dih drobenzothiopyranyl sulfone. dihydrobenzopyranyl.
dihydrobenzoxazinyl, 3-oxo-3,4-dihydro-l ,4- benzoxazinyl, indolinyl, indazolyl, isochromanyl, isoindolinyl, naphthyridinyl, phthalazinyl, piperonyl, purinyl, pyridopyridyl, pyrrolotriazinyl, quinazolinyl, tetrahydroquinolinyl, thienofuryl, thienopyridyl, 3H- imidazo[4,5-c]pyridinyl, or thienothienyl. In one embodiment of formula (I), B is unsubstituted. In another embodiment of formula (I). B is substituted with one, two, or three R4, and R4 is halo, C,_6-alkyl. C,.6-haloalk l, ORd, C(0)Rd, C(0)ORd, NReRf. or S(0)2Rd.
In one embodiment of formula (I), B is 10- 15 membered tricyclic heterocyclyl. In another embodiment, B is a 10- 15 membered tricyclic heterocycloalkyl or tricyclic heterocyloalkenyl. In another embodiment, B is a 1 - 15 membered tricyclic heteroaryl. In one embodiment of formula (I), B is unsubstituted. In another embodiment of formula (I), B is substituted with one, two, or three R4, and R4 is halo, Ci-e-alkyl, Ci-e-haloalkyl, ORd, C(0)Rd, C(0)ORd, NReRf, or S(0)2Rd. Embodiments of Formula (II)
In one embodiment, the present invention is directed, in part, to a class of compounds having a structure of Formula (II),
Figure imgf000023_0001
Formula (II)
wherein R1, A, B, Z, and n are as described in formula (II).
In one embodiment of formula (II), Z is Ci-β alkylene. In another embodiment of formula (II), Z is -CH2-, -CH2CH2-, -CH2CH2CH2-, or -CH2CH2CH2CH2-. In another embodiment of formula (II), Z is -CH(CH3)-, -CH2CH(CH3)-, -CH(CH3)CH2-,
-CH(CH3)CH2CH2-, -CH2CH(CH3)CH2-. -CH2CH2CH(CH3)-. -C(CH3)2-. -CH2C(CH3)2-. -C(CH3)2CH2-, -CH2CH2C(CH3)2-, -CH2C(CH3)2CH2-. or -C(CH3)2CH2CH2-. In another embodiment of formula (II). Z is CH(CH2CH3)-. -CH2CH(CH2CH3)-. -CH(CH2CH3)CH2-, -CH(CH2CH3)CH2CH2-, -CH2CH(CH2CH3)CH2-. -CH2CH2CH(CH:CH3)-. -C(CH2CH3)2-. -CH2C(CH2CH3)2-, -C(CH2CH3)2CH2-, -CH2CH2C(CH2CH3)2-. -CH2C(CH2CH3)2CH2-, or -C(CH2CH3)2CH2CH2-. In yet another embodiment of formula (II), Z is -CH2-, -CH2CH2-, -CH(CH3)-, or -C(CH3)2-. In yet another embodiment of formula (II), Z is -CH2- In another embodiment of formula (II), Z is C2.6 alkenylene. In yet another embodiment of formula (II). Z is -CH=CH-, -CH2CH2=CH-. -CH=CHCH2-,
-CH2-CH=CH-CH2-, -CH=CH- CH2CH2-, or -CH2CH2-CH=CH-. In another embodiment of formula (II), Z is -CH(=CH2)-, -CH2CH(=CH2)-, -CH(=CH2)CH2-. or -CH(=CHCH3)-. In yetΓ another embodiment of formula (II), Z is -CH=CH- or -CH(=CH2)-.
In one embodiment of formula (II), Z is a bond.
In another embodiment of formula (II), Z is NR5, wherein R5 is H or Ci.6 alkyl. In one embodiment of formula (II), A is phenyl, naphthyl, indenyl or C3.g cycloalkyl. In yet another embodiment of formula (II), A is phenyl.
In another embodiment of formula (II), A is a 5-7 membered heterocycloalkyl or heterocycloalkenyl. In another embodiment of formula (II), A is pyrrolidinyl,
tetrahydrofuryl, tetrahydrothienyl. imidazolidinyl. pyrazolidinyl. piperidinyl.
tetrahydropyranyl, piperazinvl. dioxanyl, morpholinyl,
Figure imgf000024_0001
2,5- dioxopyrrolidinyl, 2-oxopiperidinyl, 4-oxopiperidinyl, or 2,6-dioxopiperidinyl. In yet another embodiment of formula (II), A is dihydrofuranyl, dihydrothiophenyl. pyrrolinyl, imidazolinyl, pyrazolinyl, thiazolinyl, isothiazolinyl, dihydropyranyl, oxathiazinyl.
oxadiazinyl, or oxazinyl.
In one embodiment of formula (II), A is a 5-7 membered heteroaryl. In another embodiment of formula (II), A is pyridyl, pyrazyl, pyridinyl, pynmidinyl, pyridazinyl, 1 ,3,5-, 1.2,4- or 1 ,2,3-triazinyl, imidazyl. furanyl, thiophenyl, pyrazolyl. oxazolyl, isoxazolyl.
thiazolyl. 1 ,2.3-, 1 ,2.4-, 1 ,2.5-, or 1 ,3.4-oxadiazolyl, or isothiazol l.
In one embodiment of formula (II), A is optionally substituted with -(R')n. wherein n is 0, 1 , 2, or 3. In one embodiment of formula (II). R1 , at each occurrence, is independently selected from the group consisting of halo, CN, NO2, Ci-6-alkyl, Ci.6-haloalkyl, aryl, C3_s cycloalkyl, heteroaryl, heterocycloalkyl, OR6, SR6, C(0)R6, C(0)NR7R8, C(0)OR6, OC(0)R6, OC(0)NR7R8, NR7R8, NR7C(0)R6, S(0)R6, S(0)NR7R8, S(0)2R6, NR7S(0)2R6, and S(0)2NR7R8; wherein the C3.8 cycloalkyl, aryl, heterocycloalkyl, and heteroaryl are optionally substituted with 1, 2, or 3 substituents independently selected from halo, C1.4 alkyl, Ci.4 haloalkyl, CN, N02, ORa, SRa, C(0)Ra, C(0)NRbRc, C(0)OR\ OC(0)Ra, OC(0)NRbRc, NRbRc, NRbC(0)Ra, S(0)R\ S(0)NRbRc. S(0)2Ra, NRbS(0)2Ra, and S(0)2NR Rc.
In another embodiment of formula (II). A is phenyl, n is 2. and R1 , at each occurrence. is halo.
In one embodiment of formula (II), B is phenyl. In another embodiment of formula (II), B is phenyl and is unsubstituted with R2. In another embodiment, the phenyl is substituted with one or two R2, and R2 is halo, Ci-6-alkyl, C1.6 haloalkyl, or OR6.
In one embodiment of formula (II), B is phenyl, wherein the phenyl is substituted with R3, and R3 is heterocycloalkyl. wherein the heterocycloalkyl is optionally substituted with one, two, or three R12; wherein R12 is halo, Ci-6-alkyl, or Ci-6-haloalkyl. In yet another embodiment, phenyl is substituted with heterocycloalkyl, and heterocycloalky is selected from the group consisting of azetidinyl, pyrrolidinyl, piperidinyl, morpholinyl, piperazinvl. azepanyl, diazepanyl, and hexahydropyrrolo[l,2-a]pyrazin-2(l H)yl. In one embodiment of formula (II), B is
Figure imgf000025_0001
wherein R2 and R3 are as defined above and m is 0, 1 , or 2. In another embodiment of formula (II), m is 0. In another embodiment of formula (II), m is 1 , and R2, at each occurrence, is independently selected from the group consisting of halo. CN, OH. C alkyl. Ci.4-haloalkyl, Ci-4 alkoxy, Ci.4 haloalkoxy, Ci-4-thioalkoxy, amino, Ci-4 alk lamino, and C dialkylamino. In yet another embodiment of formula (II), m is 1 and R2 is selected from the group consisting of halo, and Ci.4 alkoxy. In another embodiment of formula (II), R3 is selected from the group consisting aryl, C3_s cycloalkyl, heteroaryl, heterocycloalkyl, aryl-Ci. 6-alkyl-, C3.8 cycloalkyl-Ci_6-alkyl-, heteroaryl-Ci.6-alkyl-, heterocycloalkyl-Ci.6-alkyl-, OR9, C(0)R9, C(0)NR'°Rn , C(0)OR9, OC(0)R9. OC(O)NR10Rn . NR10Rn . NR10C(O)R9, S(0)R9, S(0)NR'°R" , S(0)2R9, NR'°S(0)2R9. and S(O)2NR'0Rn , wherein the C3.8 cycloalkyl, aryl. heterocycloalkyl, and heteroaryl, alone or part of another moiety, are optionally substituted with one, two, or three R12, wherein R12 is defined above. In yet another embodiment of formula (II), B is phenyl, and R3 is heterocycloalkyl. In yet another embodiment of formula (II), R3 is heterocycloalkyl. In yet another embodiment of formula (II), R3 is
heterocycloalkyl, which is optionally substituted with one R12, and R12 is selected from the group consisting of halo, C alkyl, C haloalkyl, amino-CM-alkyl-, Ci.4 alkylamino-Ci.4 alkyl-, Ci-4 dialkylamino-Ci.4 alkyl-, hydroxy -Ci-4-alkyl-, CM alkyl-Ci.4 alkoxy, aryl, C3_s cycloalkyl, heteroaryl, heterocycloalkyl, aryl-(Ci_2 alkyl)-, C3_s cycloalkyl-(Ci.2 alkyl)-, heteroaryl-(C,.2 alkyl)-, heterocycloalkyl-(C,.2 alkyl)-, CN, N02, ORg, SR6, C(0)R8, C(0)NRhR', C(0)ORg, OC(0)Rg, OC(0)NRhR', NRhR', NRhC(0)R', S(0)Rg, S(0)NRhR', S(0)2R , NRhS(0)2R , and S(0)2NRhR', wherein the aryl, C3.8 cycloalkyl, heteroaryl, and heterocycloalkyl, alone or as part of another moiety, are optionally substituted with one, two or three substituents independently selected from halo and C alkyl; and wherein Rg, Rh, and R' are as defined above.
In another embodiment of formula (II), B is
Figure imgf000026_0001
wherein R2 is halo, Ci -alkyl, Ci-β haloalkyl, or OR6; p is 0 or 1 ; R12 is Ci-e-alkyl,
Figure imgf000026_0002
haloalkvl, ORB, C(0)Rg. C(0)NRhR'. C(0)ORs. NRhR', NRhC(0)Rs. S(0)2Rs. or
S(0)2NRhR': and q is 0 or 1.
In one embodiment of formula (II),
R2 is halo, Ci -alkyl, Ci.6 haloalkyl, or OR ; and p is 0, 1 , or
Figure imgf000026_0003
In one embodiment of formula (II), B is a 4-8 membered monocyclic heterocyclyl. In another embodiment. B is a 4-8 membered heterocycloalkyl or heterocvcloalkenvl. In another embodiment, B is a 5-7 membered heteroan l, In yet another embodiment of formula (I), B is pyrrolidinyl, tetrahydrofuryl, tetrahydrothienyl, imidazolidinyl, pyrazolidinyl, piperidinyl, tetrahydropyranyl, piperazinyl, dioxanyl, morpholinyl, 2-oxopyrrolidinyl, 2,5- dioxopyrrolidinyl, 2-oxopiperidinyl, 4-oxopiperidinyl, or 2,6-dioxopiperidinyl. In yet another embodiment of formula (II), B is pyridyl, pyrazyl, pyridinyl, pyrimidinyl, pyridazinyl, 1 ,3,5-, 1 ,2,4- or 1 ,2,3-triazinyl, imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, 1 ,2,3-, 1,2,4-, 1,2,5-, or 1 ,3,4-oxadiazolyl, or isothiazolyl. In one embodiment, B is unsubstituted. In another embodiment, B is substituted with one, two, or three R4, and R4 is halo, C, .6-alkyl, C,.6-haloalkyl, ORd. C(0)Rd. C(0)ORd, NReRf, or S(0)2Rd.
In one embodiment of formula (II), B is a 7-1 1 membered bicyclic heterocyclyl. In another embodiment, B is a 7-1 1 membered bicyclic heterocycloalkyl or bicyclic heterocyloalkenyl. In another embodiment, B is a 7-1 1 membered bicyclic heteroaryl. In yet another embodiment, B is 2,3-dihydro-2-oxo-lH-indolyl, benzothiazolyl, benzoxazolyl, benzothienyl, quinuclidinyl, quinolinyl, quinolinyl-N-oxide, tetrahydroisoquinolinyl, isoquinolinyl, benzimidazolyl, benzopyranyl, indolizinyl, benzofuryl, chromonyl, coumarinyl, cinnolinyl, quinoxalinyl, indazolyl, pyrrolopyridyl, furopyridinyl,
dihydroisoindolyl, dihydroquinazolinyl, 3,4-dihydro-4-oxo-quinazolinyl, benzisothiazolyl. benzisoxazolyl, benzodiazinyl, benzofurazanyl, benzothiopyranyl, benzotriazolyl, benzpyrazolyl, 1 ,3-benzodioxolyl, dihydrobenzofuryl, dihydrobenzothienyl,
dihydrobenzothiopyranyl, dihydrobenzothiopyranyl sulfone, dihydrobenzopyranyl, dihydrobenzoxazinyl, 3-oxo-3,4-dihydro- l,4- benzoxazinyl, indolinyl, indazolyl, isochromanyl, isoindolinyl, naphthyridinyl, phthalazinyl, piperonyl, purinyl, pyridopyridyl, pyrrolotriazinyl, quinazolinyl, tetrahydroquinolinyl, thienofuryl, thienopyridyl, 3H- imidazo[4,5-c]pyridinyl, or thienothienyl. In one embodiment of formula (II), B is unsubstituted. In another embodiment of formula (II), B is substituted with one, two, or three R4, and R4 is halo, C, .6-alkyl, C,.6-haloalkyl. ORd, C(0)Rd, C(0)ORd. NReRf, or S(0)2Rd.
In one embodiment of formula (II), B is 10- 15 membered tricyclic heterocyclyl. In another embodiment, B is a 10-15 membered tricyclic heterocycloalkyl or tricyclic heterocyloalkenyl. In another embodiment, B is a 10-15 membered tricyclic heteroaryl. In one embodiment of formula (II), B is unsubstituted. In another embodiment of formula (II), B is substituted with one, two, or three R4, and R4 is halo, Ci.6-alkyl, Ci.6-haloalkyl, ORd, C(0)Rd, C(0)ORd, NReRf, or S(0)2Rd Embodiments of Formula (III)
In one embodiment, the present invention is directed, in part, to a class of compounds having a structure of Fo
Figure imgf000028_0001
Formula (III)
wherein R1, A, B, Z, and n are as described in formula (I).
In one embodiment of formula (III), Z is Ci.6 alkylene. In another embodiment of formula (III), Z is -CH2-, -CH2CH2-, -CH2CH2CH2-, or -CH2CH2CH2CH2-. In another embodiment of formula (III), Z is -CH(CH3)-, -CH2CH(CH3)-, -CH(CH3)CH2-,
-CH(CH3)CH2CH2-. -CH2CH(CH3)CH2-, -CH2CH2CH(CH-,)~. -C(CH3)2-. -CH2C(CH3)2-,
-C(CH )2CH2-, -CH2CH2C(CH3)2-, -CH2C(CH3)2CH2-. or -C(CH )2CH2CH2-. In another embodiment of formula (III), Z is CH(CH2CH3)-. -CH2CH(CH2CH3)-. -CH(CH2CH3)CH2-.
-CH(CH2CH3)CH2CH2-, -CH2CH(CH2CH3)CH2-. -CH2CH2CH(CH2CH3)-, -C(CH2CH3)2-.
-CH2C(CH2CH3)2-, -C(CH2CH3)2CH2-, -CH2CH2C(CH2CH3)2-, -CH2C(CH2CH3)2CH2-, or -C(CH2CH3)2CH2CH2-. In yet another embodiment of formula (III), Z is -CH2-, -CH2CH2-,
-CH(CH3)-, or -C(CH3)2-. In yet another embodiment of formula (III), Z is -CH2-.
In another embodiment of formula (III), Z is C2-6 alkenylene. In yet another embodiment of formula (III), Z is -CH=CH-, -CH2CH2=CH-, -CH=CHCH2-,
-CH2-CH=CH-CH2-, -CH=CH- CH2CH2-, or -CH2CH2-CH=CH-, In another embodiment of- formula (III), Z is -CH(=CH2)-, -CH2CH(=CH2)-, -CH(=CH2)CH2-, or -CH(=CHCH3)-, In yet another embodiment of formula (III), Z is -CH=CH- or -CH(=CH2)-.
In one embodiment of formula (III), Z is a bond.
In another embodiment of formula (III), Z is NR5, wherein R5 is H or Ci-e alkyl. In one embodiment of formula (III), A is phenyl, naphthyl, indenyl or C3.8 cycloalkyl. In yet another embodiment of formula (III), A is phenyl.
In another embodiment of formula (III), A is a 5-7 membered heterocycloalkyl or heterocycloalkenyl. In another embodiment of formula (II), A is pyrrolidinyl,
tetrahydrofuryl. tetrahydrothienyl. imidazolidinyl. pyrazolidinyl. piperidiny l.
tetrahydropyran l. piperazinyl, dioxanyl, morpholinyl, 2-oxopyrrolidinyl. 2.5- dioxopyrrolidinyl, 2-oxopiperidinyl, 4-oxopiperidinyl, or 2,6-dioxopiperidinyl. In yet another embodiment of formula (III), A is dihydrofuranyl, dihydrothiophenyl, pyrrolinyl, imidazolinyl, pyrazolinyl, thiazolinyl, isothiazolinyl, dihydropyranyl, oxathiazinyl, oxadiazinyl, or oxazinyl.
In one embodiment of formula (III), A is a 5-7 membered heteroaryl. In another embodiment of formula (III), A is pyridyl, pyrazyl, pyridinyl, pyrimidinyl, pyridazinyl, 1 ,3,5- , 1 ,2,4- or 1 ,2,3-triazinyl, imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl. 1 ,2,3-, 1.2,4-, 1 ,2.5-. or 1.3,4-oxadiazolyl. or isothiazolyl.
In one embodiment of formula (III), A is optionally substituted with -(R' )n, wherein n is 0, 1 , 2, or 3. In one embodiment of formula (III), R1, at each. occurrence, is independently selected from the group consisting of halo, CN, NO2, Ci-6-alkyl, Ci ^-haloalkyl, aryl, C3-8 cycloalkyl, heteroaryl, heterocycloalkyl, OR6, SR6, C(0)R6, C(0)NR7R8, C(0)OR6, OC(0)R6, OC(0)NR7R8, NR7R8, NR7C(0)R6, S(0)R6, S(0)NR7R8, S(0)2R6, NR7S(0)2R6, and S(0)2NR7R8; wherein the C3-8 cycloalkyl, aryl, heterocycloalk l, and heteroaryl are optionally substituted with 1 , 2, or 3 substituents independently selected from halo, C 1 -4 alkyl, C haloalkyl. CN. N02, ORa. SR\ C(0)Ra. C(0)NRbRc, C(0)ORa. OC(0)Ra, OC(0)NRbRc. NRbRc, NRbC(0)Ra, S(0)Ra, S(0)NRbRc, S(0)2Ra, NRbS(0)2Ra, and S(0)2NRbRc.
In another embodiment of formula (III), A is phenyl, n is 2, and R1. at each occurrence, is halo.
In one embodiment of formula (III), B is phenyl. In another embodiment of formula (III), B is phenyl and is unsubstituted with R2. In another embodiment, the phenyl is substituted with one or two R2, and R2 is halo, Ci-6-alkyl, C 1.6 haloalkyl, or OR6.
In one embodiment of formula (III), B is phenyl, wherein the phenyl is substituted w ith R3, and R3 is heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one, two, or three R12; wherein R12 is halo, Ci-e-alkyl, or Ci e-haloalkyl. In yet another embodiment, phenyl is substituted with heterocycloalkyl, and heterocycloalky is selected from the group consisting of azetidinyl, pyrrolidinyl, piperidinyl, morpholinyl. piperazinyl. azepanyl, diazepanyl, and hexahydropyrrolo| l ,2-a]pyrazin-2( l H)yl. In one embodiment of formula (III), B is
Figure imgf000030_0001
wherein R2 and R3 are as defined above and m is 0, 1 , or 2. In another embodiment of formula (III), m is 0. In another embodiment of formula (III), m is 1. and R2. at each occurrence, is independently selected from the group consisting of halo. CN, OH. C alkyl, Ci-4-haloaIkyl, C alko y, C1.4 haloalko.xy, C -thioalkoxy. amino, C 1.4 alky Iamino, and C dialkylamino. In yet another embodiment of formula (III), m is 1 and R2 is selected from the group consisting of halo, and Ci^ alkoxy. In another embodiment of formula (III), R3 is selected from the group consisting aryl, C3-8 cycloalkyl, heteroaryl, heterocycloalkyl, aryl-Ci. 6-alkyl-, C3.8 cycloalkyl-Ci.6-alkyl-, heteroaryl-Ci 6-alkyl-, heterocycloalkyl-Ci 6-alkyl-, OR9, C(0)R9, C(0)NR'°R" . C(0)OR9, OC(0)R9. OC(O)NR10Rn, NRI OR" , NR I OC(0)R9. S(0)R9, S(0)NR'°R" , S(0)2R9, NR10S(O)2R9, and S(0)2NRI OR" , wherein the C3 S cycloalkyl, aryl, heterocycloalkyl, and heteroaryl, alone or part of another moiety, are optionally substituted with one, two, or three R12, wherein R12 is defined above. In yet another embodiment of formula (III), B is phenyl, and R3 is heterocycloalkyl. In yet another embodiment of formula (III), R3 is heterocycloalkyl. In yet another embodiment of formula (III), R3 is
heterocycloalkyl, which is optionally substituted with one R12, and R12 is selected from the group consisting of halo, CM alkyl. CM haloalkyl, amino-Ci.4-alkyl-, Ci 4 alkylamino-Ci.4 alkyl-, Ci 4 dialkylamino-C i 4 alkyl-, hydroxy -C i-4-alkyl-, CM alkyl-C1.4 alko.xy. aryl. C3-8 cycloalkyl, heteroaryl, heterocycloalkyl, aryl-(Ci. alkyl)-, C3.8 cycloalkyl-(C |_2 alkyl)-, heteroaryl-(C|.2 alkyl)-, heterocycloalkyl-(Ci.2 alkyl)-, CN, N02, OR8. SR , C(0)RB.
C(0)NRhR', C(0)OR8, OC(0)R , OC(0)NRhR', NRhR', NRhC(0)R', S(0)R8, S(0)NRhR', S(0)2Rs, NRhS(0)2Rg, and S(0)2NRhR', wherein the aryl, C3.s cycloalkyl, heteroaryl, and heterocycloalkyl, alone or as part of another moiety, are optionally substituted with one, two or three substituents independently selected from halo and C alkyl, and wherein R8, Rh, and R1 are as defined above.
In another embodiment of formula (III), B is
Figure imgf000031_0001
wherein R2 is halo, Ci -alkyl, Ci.e haloalkyl, or OR6; p is 0 or 1 ; R12 is Ci-e-alkyl, Ci-6- haloalkyl, OR8, C(0)R8, C(0)NRhR', C(0)OR8, NRhR', NRhC(0)Rs, S(0)2R6, or
S(0)2NRhR': and q is 0 or 1.
of formula (III),
R2 is halo, Ci -alkyl, Ci-6 haloalkyl, or OR ; and p is 0, 1 , or
Figure imgf000031_0002
In one embodiment of formula (III), B is a 4-8 membered monocyclic heterocyclyl. In another embodiment, B is a 4-8 membered heterocycloalkyl or heterocycloalkenyl. In another embodiment, B is a 5-7 membered heteroar l. In yet another embodiment of formula (III). B is pyrrolidinyl, tetrahydrofuryl, tetrahydrothienyl. imidazolidinyl, pyrazolidinyl, piperidinyl, tetrahydropyranyl. piperazinyl, dioxanyl. mo holinyl, 2-oxopyrrolidinyl, 2.5- dioxopyrrolidinyl, 2-oxopiperidinyl, 4-oxopiperidinyl, or 2,6-dioxopiperidinyl. In yet another embodiment of formula (III), B is pyridy , pyrazyl, pyridinyl. pyrimidinyl, pyridazinyl, 1 ,3,5-, 1 ,2,4- or 1 ,2,3-triazinyl, imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, 1 ,2,3-, 1,2,4-, 1,2,5-, or 1 ,3,4-oxadiazolyl, or isothiazolyl. In one embodiment, B is unsubstituted. In another embodiment, B is substituted with one, two, or three R4, and R4 is halo, Cj.e-alkyl, C,.6-haloalkyl, ORd, C(0)Rd, C(0)ORd, NReRf, or S(0)2Rd.
In one embodiment of formula (III), B is a 7- 1 1 membered bicyclic heterocyclyl. In another embodiment. B is a 7-1 1 membered bicyclic heterocycloalkyl or bicyclic heterocyloalkenyl. In another embodiment. B is a 7-1 1 membered bicyclic heteroaryl. In yet another embodiment, B is 2,3-dihydro-2-oxo-l H-indolyl, benzothiazolyl, benzoxazolyl, benzothienyl, quinuclidinyl, quinolinyl, quinolinyl-N-oxide. tetrahydroisoquinolinyl, isoquinolinyl, benzimidazolyl, benzopyranyl, indolizinyl, benzofuryl, chromonyl, coumarinyl, cinnolinyl, quinoxalinyl, indazolyl, pyrrolopyridyl, furopyridinyl,
dihydroisoindolyl, dihydroquinazolinyl, 3,4-dihydro-4-oxo-quinazolinyl, benzisothiazolyl, benzisoxazolyl. benzodiazinyl. benzofurazanyl. benzothiopyranyl. benzotriazolyl.
benzpyrazol l, 1.3-benzodioxolyl. dihydrobenzofuryl, dihydrobenzothienyl.
dihydrobenzothiopyranyl. dihydrobenzothiopyranyl sulfone, dihydrobenzopyranyl, dihydrobenzoxazinyl, 3-oxo-3,4-dihydro-l,4- benzoxazinyl, indolinyl, indazolyl, isochromanyl, isoindolinyl, naphthyridinyl, phthalazinyl, piperonyl, purinyl, pyridopyridyl, pyrrolotriazinyl, quinazolinyl, tetrahydroquinolinyl, thienofuryl, thienopyridyl, 3H- imidazo[4,5-c]pyridinyl, or thienothienyl. In one embodiment of formula (III), B is unsubstituted. In another embodiment of formula (III), B is substituted with one, two, or three R4. and R4 is halo, C,-6-alkyl, C,.6-haloalkyl, ORd, C(0)Rd, C(0)ORd, NReRf, or S(0)2Rd
In one embodiment of formula (III), B is 10- 15 membered tricyclic heterocyclyl. In another embodiment, B is a 10- 15 membered tricyclic heterocycloalkyl or tricyclic heterocyloalkenyl. In another embodiment, B is a 10- 15 membered tricyclic heteroaryl. In one embodiment of formula (III), B is unsubstituted. In another embodiment of formula (III), B is substituted with one, two, or three R4, and R4 is halo, Ci-e-alkyl, Ci.e-haloalkyl, ORd, C(0)Rd, C(0)ORd, NReRr, or S(0)2Rd. Embodiments of Formula (IV)
In one embodiment, the present invention is directed, in part, to a class of compounds having a structure of Formula (IV),
Figure imgf000033_0001
Formula (IV)
wherein R1, A. B, Z, and n are as described in formula (I).
In one embodiment of formula (IV), Z is C|.e alkylene. In another embodiment of formula (IV), Z is -CH2-, -CH2CH2-, -CH2CH2CH2-, or -CH2CH2CH2CH2-. In another embodiment of formula (IV), Z is -CH(CH3)-, -CH2CH(CH3)-, -CH(CH3)CH2-,
-CH(CH3)CH2CH2-, -CH2CH(CH3)CH2-, -CH2CH2CH(CH3)-, -C(CH3)2-, -CH2C(CH,)2-, -C(CH3)2CH2-. -CH2CH2C(CH3)2-, -CH2C(CH3)2CH2-, or -C(CH3)2CH2CH2-. In another embodiment of formula (IV). Z is CH(CH2CH3)-. -CH2CH(CH2CH3)-, -CH(CH2CH3)CH2-. -CH(CH2CH3)CH2CH2-. -CH2CH(CH2CH3)CH2-, -CH2CH2CH(CH2CH3)-, -C(CH2CH3)2-. -CH2C(CH2CH3)2-, -C(CH2CH3)2CH2-, -CH2CH2C(CH2CH3)2-. -CH2C(CH2CH3)2CH2-, or -C(CH2CH3)2CH2CH2-. In yet another embodiment of formula (IV), Z is -CH2-, -CH2CH2-, -CH(CH3)-, or -C(CH3)2-. In et another embodiment of formula (IV), Z is -CH2-.
In another embodiment of formula (IV), Z is C2.6 alkenylene. In yet another embodiment of formula (IV), Z is -CHOH-, -CH2CH2=CH-, -CH=CHCH2-,
-CH2-CH=CH-CH2-, -CH=CH- CH2CH2-, or -CH2CH2-CH=CH-. In another embodiment of formula (IV), Z is -CH(=CH2)-, -CH2CH(=CH2)-, -CH(=CH2)CH2-, or -CH(=CHCH3)-. In yet another embodiment of formula (IV), Z is -CH=CH- or -CH(=CH2)-.
In one embodiment of formula (IV), Z is a bond.
In another embodiment of formula (IV), Z is NR5, wherein R5 is H or C |.fi alkyl. In one embodiment of formula (IV), A is phenyl, naphthyl, indenyl or C3.s cycloalkyl. In yet another embodiment of formula (IV), A is phenyl.
In another embodiment of formula (IV), A is a 5-7 membered heterocycloalkyl or heterocycloalkenyl. In another embodiment of formula (IV), A is pyrrolidinyl,
tetrahydrofuryl, tetrahydrothienyl. imidazolidinyl. pyrazolidinyl, piperidinyl,
tetrahydropyranyl, piperaziny l. dioxanyl. mo holinyl. 2-oxopyrrolidinyl. 2.5- dioxopyrrolidinyl, 2-oxopiperidinyl, 4-oxopiperidinyl, or 2,6-dioxopiperidinyl. In yet another embodiment of formula (IV), A is dihydrofuranyl, dihydrothiophenyl. pyrrolinyl, imidazolinyl, pyrazolinyl, thiazolinyl, isothiazolinyl, dihydropyranyl, oxathiazinyl, oxadiazinyl, or oxazinyl.
In one embodiment of formula (IV), A is a 5-7 membered heteroaryl. In another embodiment of formula (IV), A is pyridyl, pyrazyl, pyridinyl, pyrimidinyl, pyridazinyl, 1 ,3,5- , 1 ,2,4- or 1 ,2,3-triazinyl, imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl. 1 ,2.3-, 1 ,2,4-, 1 ,2,5-, or 1 ,3.4-oxadiazolyl, or isothiazolyl.
In one embodiment of formula (IV), A is optionally substituted with -(R')n, wherein n is 0, 1. 2, or 3. In one embodiment of formula (IV), R1 , at each occurrence, is independently selected from the group consisting of halo, CN, NO2, Ci-6-alkyl. Ci-6-haloalkyl, aryl, C3-8 cycloalkyl, heteroaryl, heterocycloalkyl, OR6, SR6, C(0)R6, C(0)NR7R8, C(0)OR6, OC(0)R6, OC(0)NR7R8, NR7R8, NR7C(0)R6, S(0)R6, S(0)NR7R8, S(0)2R6, NR7S(0)2R6, and S(0)2NR7R8; wherein the C3-8 cycloalkyl, aryl, heterocycloalkyl, and heteroaryl are optionally substituted with 1, 2, or 3 substituents independently selected from halo, C alkyl, C-4 haloalkyl, CN, N02, ORa, SRa, C(0)Ra. C(0)NRbRc, C(0)ORa, OC(0)Ra, OC(0)NRbRc. NRbRc, NRbC(0)Ra, S(0)Ra, S(0)NRbRc, S(0)2Ra, NRbS(0)2Ra, and S(0)2NRbRc.
In another embodiment of formula (IV), A is phenyl, n is 2. and R1 , at each occurrence, is halo.
In one embodiment of formula (IV), B is phenyl. In another embodiment of formula (IV), B is phenyl and is unsubstituted with R2. In another embodiment, the phenyl is substituted with one or two R2, and R2 is halo, Ci-6-alkyl, Ci-6 haloalkyl, or OR6.
In one embodiment of formula (IV), B is phenyl, wherein the phenyl is substituted with R3, and R3 is heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one, two, or three R12; wherein R12 is halo, Ci-6-alkyl, or Ci-6-haloalkyl. In yet another embodiment, phenyl is substituted with heterocycloalkyl, and heterocycloalky is selected from the group consisting of azetidinyl, pyrrolidinyl. piperidinyl. morpholinyl. piperazinyl. azepanyl, diazepanyl, and hexahydropyrrolo[ l ,2-a]pyrazin-2(l H)yl. In one embodiment of formula (IV), B is
Figure imgf000035_0001
wherein R2 and R3 are as defined above and m is 0, 1 , or 2. In another embodiment of formula (IV), m is 0. In another embodiment of formula (IV). m is 1 . and R2, at each occurrence, is independently selected from the group consisting of halo. CN. OH. C 1.4 alky 1. Ci-4-haloalkyl, C1.4 alko.xy, Ci^ haloalkoxy. Ci -4-thioalkoxy . amino. C i-4 alkylamino. and C 1.4 dialkylamino. In yet another embodiment of formula (IV). m is 1 and R2 is selected from the group consisting of halo, and Ci.4 alkoxy. In another embodiment of formula (IV), R3 is selected from the group consisting aryl, C3-8 cycloalkyl, heteroaryl, heterocycloalkyl, aryl-Ci- 6-alkyl-, C3.8 cycloalkyl-Ci.6-alkyl-, heteroaryl-Ci.e-alkyl-, heterocycloalkyl-Ci.6-alkyl-, OR9, C(0)R9, C(O)NR10R" , C(0)OR9, OC(0)R9, OC(O)NR10Rn, NR10Rn , NR10C(O)R9, S(0)R9, S(O)NR,0Rn , S(0)2R9, NR10S(O)2R9, and S(O)2NR10Rn , wherein the C3.8 cycloalkyl. aryl, heterocycloalkyl. and heteroaryl. alone or part of another moiety, are optionally substituted with one. two. or three R12. wherein R12 is defined above. In y et another embodiment of formula (IV), B is phenyl, and R3 is heterocycloalkyl. In yet another embodiment of formula (IV), R3 is heterocycloalk l. In yet another embodiment of formula (IV), R3 is
heterocycloalkyl, which is optionally substituted with one R12, and R12 is selected from the group consisting of halo, C1.4 alkyl, C haloalkyl, amino-Ci.4-alkyl-, Ci.4 alkylamino-C i 4 alkyl-, Ci.4 dialkylamino-Ci.4 alkyl-, hydroxy -Ci-4-alkyl-, C M alkyl-Ci-4 alkoxy, aryl, C3.8 cycloalkyl, heteroaryl, heterocycloalkyl, aryl-(Ci.2 alkyl)-, C3.8 cycloalkyl-(Ci.2 alkyl)-, heteroaryl-(C,.2 alkyl)-, heterocycloalkyl-(C,.2 alkyl)-, CN, N02, ORs, SRS, C(0)Rg, C(0)NRhR'. C(0)ORB, OC(0)R , OC(0)NRhR', NRhR'. NRhC(0)R'. S(0)R . S(0)NRhR'. S(0)2Rg, NRhS(0)2Rg. and S(0)2NRhR', wherein the aryl, CM cycloalkyl, heteroaryl. and heterocycloalkyl, alone or as part of another moiety, are optionally substituted with one, two or three substituents independently selected from halo and CM alkyl; and wherein Rg, Rh, and R' are as defined above.
In another embodiment of formula (IV), B is
Figure imgf000036_0001
wherein R2 is halo, Ci-e-alkyl, C e haloalkyl, or OR6; p is 0 or 1 ; R12 is Ci.e-alkyl, Ci.6- haloalkyl, OR8, C(0)Rg, C(0)NRhR', C(0)OR8, NRhR', NRhC(0)Rs, S(0)2R , or
S(0)2NRhR', and q is 0 or 1.
In one embodiment of formula (IV),
R2 is halo, Ci-6-alkyl, Ci-6 haloalkyl, or OR6; and p is 0, 1 , or
Figure imgf000036_0002
In one embodiment of formula (IV), B is a 4-8 membered monocyclic heterocyclyl. In another embodiment, B is a 4-8 membered heterocycloalkyl or heterocycloalkenyl. In another embodiment, B is a 5-7 membered heteroaryl. In yet another embodiment of formula (IV), B is pyrrolidinyl, tetrah drofuryl, tetrahydrothienyl, imidazolidinyl, pyrazolidinyl, piperidinyl, tetrahydropyranyl, piperazinyl, dioxanyl, morpholinyl. 2-oxopyrrolidinyI, 2,5- dioxopyrrolidinyl, 2-oxopiperidinyl. 4-oxopiperidinyl, or 2,6-dioxopiperidinyl. In yet another embodiment of formula (IV). B is pyridyl, pyrazyl, pyridinyl, pyrimidinyl, pyridazinyl, 1 ,3,5-, 1 ,2,4- or 1 ,2,3-triazinyl, imidazyl, furanyl, thiophenyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, 1 ,2,3-, 1,2,4-, 1,2,5-, or 1 ,3,4-oxadiazolyl, or isothiazolyl. In one embodiment, B is unsubstituted. In another embodiment, B is substituted with one, two, or three R4, and R4 is halo, C,.6-alkyl, C,.6-haloalkyl, ORd, C(0)Rd, C(0)ORd, NReRf, or S(0):Rd.
In one embodiment of formula (IV). B is a 7- 1 1 membered bicyclic heterocyclyl. In another embodiment, B is a 7-1 1 membered bicyclic heterocycloalkyl or bicyclic heterocyloalkenvl. In another embodiment, B is a 7-1 1 membered bicyclic heteroaryl. In yet another embodiment, B is 2,3-dihydro-2-oxo-l H-indolyl. benzothiazolyl, benzoxazolyl. benzothienyl, quinuclidinyl, quinolinyl, quinolinyl-N-oxide, tetrahydroisoquinolinyl.
isoquinolinyl, benzimidazolyl, benzopyranyl, indolizinyl, benzofuryl, chromonyl, coumarinyl, cinnolinyl, quinoxalinyl, indazolyl, pyrrolopyridyl, furopyridinyl,
dihydroisoindolyl, dihydroquinazolinyl, 3,4-dihydro-4-oxo-quinazolinyl, benzisothiazolyl, benzisoxazolyl, benzodiazinyl, benzofurazanyl, benzothiopyranyl, benzotriazolyl, benzpyrazolyl. 1.3-benzodioxolyl, dihydrobenzofuryl, dihydrobenzothienyl,
dihydrobenzothiopyranyl. dihydrobenzothiopyranyl sulfone, dihydrobenzopyranyl, dihydrobenzoxazinyl, 3-oxo-3,4-dihydro- l ,4- benzoxazinyl, indolinyl, indazolyl, isochromanyl, isoindolinyl, naphthyridinyl, phthalazinyl, piperonyl. purinyl, pyridopyridyl, pyrrolotriazinyl, quinazolinyl, tetrahydroquinolinyl, thienofuryl, thienopyridyl, 3H- imidazo[4,5-c]pyridinyl, or thienothienyl. In one embodiment of formula (I), B is unsubstituted. In another embodiment of formula (IV), B is substituted with one, two, or three R4, and R4 is halo, C,.6-alkyl, C,.6-haloalkyl, ORd, C(0)Rd, C(0)ORd, NReRf, or S(0)2Rd
In one embodiment of formula (IV), B is 10-15 membered tricyclic heterocyclyl. In another embodiment, B is a 10- 15 membered tricyclic heterocycloalkyl or tricyclic heterocyloalkenvl. In another embodiment, B is a 10- 15 membered tricyclic heteroaryl. In one embodiment of formula (IV), B is unsubstituted. In another embodiment of formula (IV), B is substituted with one, two, or three R4, and R4 is halo, Ci-6-alkyl, Ci-6-haloalkyl, ORd, C(0)Rd, C(0)ORd, NReR', or S(0)2Rd. Specific embodiments contemplated as part of the invention include, but are not limited to, compounds of formula (I), for example:
7-(2,6-dichlorobenzyl)-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}-2,3- dihydropyrido[4,3-d]pyrimidin-4(l H)-one;
7- (2,6-dichlorobenzyl)-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol;
8- (2,6-dichlorobenzyl)-6-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino }- 1.2,3,4- tetrahydro-5H-pyrido[2,3-e][ l,4]diazepin-5-one;
8-(2,6-dichlorobenzyl)-6-{[4-(piperazin-l-yl)phenyl]amino}-l ,2,3,4-tetrahydro-5H- py rido [2,3 -e] [ 1 ,4] diazepin-5 -one;
7- (2,6-dichlorobenzyl)-5-{ [4-(piperazin-l-yl)phenyl]amino}pyrido[3,4-d]pyridazin-4- ol:
8- (2 )-dichlorobenz\ l)-6-{ [4-(piperazin- l -yl)phenyl]amino}-1.2,3.4-tetrahydro-5H- py rido [4,3 -e] [ 1 ,4] diazepin-5 -one;
7-(2,6-dichlorobenzyl)-5-{ [3-methyl-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
5-{ [4-(4-cycIohexyIpiperazin-l-yI)-2-methoxyphenyI]amino}-7-(2,6- dichlorobenzyl)pyrido[3,4-d]pyridazin-4(3H)-one;
[4-(4-{ [7-(2,6-dichlorobenzyl)-4-hydroxypyrido[3,4-d]pyridazin-5-yl]amino}-3- me thoxy pheny l)piperazin- 1 -y 1] (pheny l)methanone ;
7-[(2,6-dichlorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-(2,6-dichlorobenzyl)-5-({2-methoxy-4-[4-(propan-2-ylsulfonyl)piperazin-l- yl]phenyl}amino)pyrido[3,4-d]pyridazin-4-ol;
l-[4-(4-{[7-(2,6-dichlorobenzyl)-4-hydroxypyrido[3,4-d]pyridazin-5-yl]amino}-3- methoxyphenyl)piperazin-l -yl]-2-(dimethylamino)ethanone;
5-{ [3-chloro-4-(piperazin-l -yl)phenyl]amino}-7-(2,6-dichlorobenzyl)pyrido[3,4- d]pyridazin-4(3H)-one;
7-(2,6-dichlorobenzyl)-5-{ [5-(piperazin-l -yl)pyridin-2-yl]amino}pyrido[3,4- d)pyridazin-4(3H)-one;
7-(2,6-dichlorobenzy l)-5-( { 2-methoxy-4-[4-( 1 -methy lpiperidin-4-y l)piperazin- 1 - yl]phenyl}amino)pyrido[3,4-d]pyridazin-4(3H)-one; 7-(2,6-dichlorobenzyl)-5-({2-methoxy-4-[4-(3-methylbutyl)piperazin-l - y ljpheny 1 }amino)py rido[3 ,4-d]py ridazin-4(3 H)-one;
7-(2,6-dichlorobenzyl)-5-({2-methoxy-4-[2-(pyrrolidin-l - yl)ethyl]phenyl}amino)pyrido[3,4-d]pyridazin-4(3H)-one;
7-(2,6-dichlorobenzyl)-5-({2-methoxy-4-[2-oxo-2-(pyrrolidin-l - y l)ethy ljpheny 1 } amino)py rido [3 ,4-d]py ridazin-4(3 H)-one;
7-(2,6-dichlorobenzyl)-5-({2-methoxy-4-[4-(3-methylbutanoyl)piperazin-l - yl]phenyl}amino)pyrido[3,4-d]pyridazin-4(3H)-one;
7-(2,6-dichloΓobenzyl)-5-{ [2,5-difl oro-4- ipeΓazin-l -yl)phenyl]anlino}pyrido[3,4- d]pyridazin-4(3H)-one;
7-(2,6-dichlorobenzyl)-5-{[2,6-dimethyl-4-(piperazin-l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol;
5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}-7-{ [2-(propan-2- ylsulfonyl)phenyl]amino}pyrido[3.4-d]pyridazin-4(3H)-one;
5- { [ 2-methoxy-4-(piperazin- 1 -y l)pheny l]amino } -7- { [ (4R)-4-(propan-2-y l)-4,5 - dihydro-l ,3-oxazol-2-yl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-[(2-chlorophenyl)amino]-5-{ [2-methoxy-4-(piperazin- l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
7-[(5-chloro-2-fluorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l - y l)pheny l]amino } py rido [3 ,4-d]py ridazin-4(3 H)-one ;
7-(2,6-dichlorobenzyl)-5-{[2-fluoro-4-(piperazin-l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
7-[(2-chloro-5-fluorophenyl)amino]-5-{ [2-methoxy-4-(piperazin- l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
7-[(2,5-dichlorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l - y l)pheny l]amino}py rido[3 ,4-d]py ridazin-4(3 H)-one ;
7-[(2-chloro-6-fluorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l - y l)pheny l]amino}pyrido [3 ,4-d]pyridazin-4(3 H)-one ;
7-(2,6-dichlorobenzyl)-5-{ [2-methoxy-4-(4-methylpiperazin-l- y l)pheny ljamino }py rido [3 ,4-d]py ridazin-4(3 H)-one ;
7-[(3,5-dichlorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one; 7-[(2,6-difl orophenyl)amino]-5-{ [2-methoxy-4-(piperazin- l - y Opheny ljamino } py rido[3 ,4-d]py ridazin-4(3 H)-one :
7-[(3,5-dichloropyridin-4-yl)amino]-5-{ [2-methoxy-4-(piperazin-l- y l)pheny ljamino } py rido [3 ,4-d]py ridazin-4(3 H)-one ;
7-[(2,4-dichlorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-[(2,6-dichloro-4-fluoropheny0amino]-5-{ [2-methoxy-4-(piperazin-l - y Opheny l]amino}pyrido[3,4-d]pyridazin-4-ol;
7-[(2,3-difluoropheny0amino]-5-{ [2-methoxy-4-(piperazin- l- y Opheny ljamino } py rido [3 ,4-d]py ridazin-4(3 H)-one ;
7-[(furan-2-ylmethy0amino]-5-{ [2-methoxy-4-(piperazin-l - y0phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
5-{[2-methoxy-4-(piperazin-l-yl)phenyl]amino}-7-(piperidin-l -yl)pyrido[3,4- d]pyridazin-4(3H)-one;
7-(benzylamino)-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
5-{ [2-methoxy-4-(piperazin- l -y Opheny l]amino}-7-phenylpyridof3,4-d]pyridazin- 4(3H)-one:
7-(2,6-dichlorobenzy0-5-{ [2,6-difluoro-4-(piperazin- l -y Opheny l]amino}py rido[3,4- d]pyridazin-4(3H)-one;
5-{ [2-methoxy-4-(piperazin- l-yl)phenyl]amino}-7-(pyridin-2-ylamino)pyrido[3,4- d]pyridazin-4(3H)-one;
5-{ [2-methoxy-4-(piperazin-l-yl)phenyl]amino}-7-(pyridin-3-ylamino)pyrido[3,4- d]pyridazin-4(3H)-one;
7-(cyclohexylamino)-5-{[2-methoxy-4-(piperazin-l -y0phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
5 - { [2-methoxy -4-(piperazin- 1 -y Opheny ljamino } -7- { [2-(pyridin-2- yl)ethyl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-[(2-fluorophenyl)amino]-5-{ [2-methoxy-4-(piperazin- 1 - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
7-[(2,6-dimethylphenyl)amino]-5-{[2-methoxy-4-(piperazin-l- y Opheny l]amino }pyrido [3 ,4-d]py ridazin-4(3 H)-one ;
7-[(3-chloropyridin-2-yl)amino]-5-{[2-methoxy-4-(piperazin-l - y Opheny l]amino}pyrido[3,4-d]pyridazin-4(3H)-one; 7-[(2,3-dichlorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l- yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one.
5 - { [2-methoxy -4-(piperazin- 1 -y l)pheny 1] amino } -7- [(2.4, 6- trifluorophenyl)amino]pyrido[3,4-d]pyridazin-4(3H)-one;
5-{ [2-methox -4-(piperazin-l -yl)phenyl]amino}-7-[(2,3,4- trifluorophenyl)amino]pyrido[3,4-d]pyridazin-4(3H)-one;
7-[(3-chloro-2-fluorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l- yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
5-{ [2-methoxy -4-(piperazin-l -yl)phenyl]amino}-7-(tetrahydro-2H-pyran -4- ylamino)pyrido[3,4-d]pyridazin-4-ol:
5-{ [2-methoxy -4-(piperazin- l -yl)phenyl]amino}-7-( l ,3-thiazol-2-ylamino)pyrido[3.4- d]pyridazin-4(3H)-one;
5 - { [2-chloro-4-(piperazin- 1 -y l)pheny Ijamino } -7-(2.6-dichlorobenzy l)pyrido [3,4- d]pyridazin-4(3H)-one;
5-{ [2-methox -4-(piperazin-l-yl)phenyl]amino}-7-[(l -methylpiperidin -4- y l)amino]py rido [3 ,4-d]py ridazin-4(3 H)-one ;
7-(2,6-dichlorobenzyl)-5-{[3-fluoro-2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-[(3-chloropyridin-4-yl)amino]-5-{[2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3 H)-one;
5-{ [2-bromo-4-( iperazin-l -yl)phenyl]amino}-7-(2,6-dichlorobenzyl)pyrido[3.4- d]py ridazin-4(3 H)-one ;
7-(2-chlorophenoxy )-5- { [2-methoxy-4-(piperazin- 1 -y Dpheny Ijamino } py rido [3 ,4- d]pyridazin-4(3H)-one;
7-(2,6-dichlorophenoxy)-5-{ [2-methoxy -4-(piperazin- l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
7-(2,6-dichlorobenzyl)-5-{ [4-(piperazin-l -yl)-2- (trifluoromethoxy)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-[(2,3-dichloro-6-fluorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l - yl)iphenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
7-(2,6-dichlorobenzyl)-5-{ [4-(hexahydropyrrolo[ l ,2-a]pyrazin-2(l H)-yl)-2- methoxyphenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
7-[(2,3-dichloro-4-fluorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l- yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol; 2 - [(2, 6-dichloropheny l)amino ] -4- { [ 2-methoxy -4-(piperazin- 1 - y l)pheny ljamino }py rido[2,3 -d]py ridazin-5 (6H)-one ;
7-(2,6-dichlorobenzyl)-5-{ [2 -dimethyl-4-(piperazin-l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
2-(2,6-dichlorobenzyl) -{ [2-methoxy-4-(piperazin- l-yl)phenyl]amino}pyrido[2.3- d]pyridazin-5(6H)-one;
7-[(2-chloro-4,6-difluorophenyl)amino]-5-{ [2-methoxy -4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-(2,6-dichlorobenzyl)-5-{[2-methoxy-5-methyl-4-(piperazin- l - y l)pheny l]amino} py rido [3 ,4-d]py ridazin-4(3 H)-one ;
7-(2,6-dichlorobenzyl)-5-{ [2-fluoro-5-methyl-4-(piperazin- l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
6- (2,6-dichlorobenzyl)-8-[(6-methoxy-l ,2,3,4-tetrahydroisoquinolin-7- yl)amino]phthalazin- l (2H)-one;
7- (2,6-difluorophenoxy)-5-{ [2-methoxy -4-(piperazin-l-yl)phenyl]amino}pyrido[3 ,4- d]pyridazin-4(3H)-one;
7-(2-fluorophenoxy)-5-{ [2-methoxy -4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol;
5-{ [2-methoxy -4-(piperazin-l-yl)phenyl]amino}-7-[(2,3,4- trichlorophenyl)amino]pyrido[3,4-d]pyridazin-4(3H)-one;
7-(2,3-difluorophenoxy)-5-{ [2-methoxy -4-(piperazin-l -y l)pheny l]amino}pyrido[3,4- d]pyridazin-4-ol;
7-(2,3-dichlorophenoxy)-5-{ [2-methoxy -4-(piperazin- l -y l)phenyl]am ino }py rido [3,4- d]pyridazin-4(3H)-one;
7-(2,6-dichloro-4-fl orophenoxy)-5-{ [2-methoxy -4-(piperazin- 1- y])phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
7-[(3-chloropyridin-4-yl)oxy]-5-{ [2-methoxy -4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
7-(2,3-dimethylphenoxy)-5-{ [2-methoxy -4-(piperazin-l -y l)phenyl]amino}pyrido[3,4- d[pyridazin-4-ol;
7-[(3-fluoropyridin-4-yl)oxy]-5- { [2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
5 - { [2-methoxy -4-(piperazin- 1 -y l)pheny l]amino} -7-(2,3 ,4- trichlorophenoxy)pyrido[3,4-d]pyridazin-4-ol; 7-(2,4-dichlorophenoxy)-5-{[2-methoxy-4-(piperazin- l -yl)phenyl]amino}pyrido[3,4- d]py ridazin-4(3 H)-one;
7-[(trans-4-hydroxycyclohexyl)amino]-5-{ [2-methoxy-4-(piperazin- l- yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-(cyclopentyloxy)-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- djpyridazin-4-ol;
7-(2,6-dichlorobenzyl)-5-[(7-methoxy-l ,2,3,4-tetrahydroisoquinolin-6- y))amino]pyrido|3.4-d]pyridazin-4(3H)-one;
2-(2-chlorophenoxy)-4-{[2-methoxy-4-(piperazin- l -yl)phenyllamino}pyrido|2.3- d]py ridazin-5 (6H)-one ;
5-{ [2-chloro-4-(pyrrolidin-l -ylmethyl)phenyl]amino}-7-(4-fluoropiperidin-l - y l)py rido [3 ,4-d]py ridazin-4-ol;
2-(2-chlorobenzyl)-4-[(6-methoxy-l ,2,3,4-tetrahydroisoquinolin-7- y l)amino] py rido 12,3 -d]py ridazin-5 -ol ;
2-(2-chlorobenzyl)-4-{ [2-methoxy-4-(piperazin- l - ylmethyl)phenyl]amino}pyrido[2,3-d]pyridazin-5(6H)-one;
5-{ [2-chloro-4-(pyrrolidin-l -y lmethyl)phenyl]amino}-7- [(cyclopropylmethyl)amino]pyrido[3,4-d]pyridazin-4-ol;
2-(2-chlorobenzyl)-4-{ [2-methoxy-4-(morpholin-4- ylmemyl)phenyl]amino}pyrido[2,3-d)pyridazin-5-ol;
7-(2-chlorophenoxy)-5-{[2-ethoxy-4-(pyrrolidin- l - ylmethyl)phenyl]amino}pyrido[3,4-d)pyridazin-4(3H)-one:
5 - { [2-chloro-4-(py rrolidin- 1 -y lmethy l)pheny 1] am ino } -7-(4-hy droxy piperidin- 1 - yl)pyrido[3,4-d]pyridazin-4(3H)-one;
5 - { [2-chloro-4-(py rrolidin- 1 -y lmethy l)pheny 1 ] amino } -7-(3-hy droxy azetidin- 1 - yl)pyrido[3,4-d]pyridazin-4(3H)-one;
7-(2-chlorophenoxy)-5-{[2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol;
7-[(cyclopropy lmethy l)amino]-5-{ [2-methoxy-4-(piperidin-4- yl)phenyl]amino}pyrido[3.4-d]pyridazin-4-ol;
2-(2-chIorobenzyI)-4-{ [2-methoxy-4-(piperidin-4-y l)phenyI]amino }pyrido[2.3- d]pyridazin-5(6H)-one;
2-(2,6-dichlorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one; 4- {[2-metho -4-(pίperidin-4-vl)phen ]]arnino}-2-[2-(mo holin-4- yl)ethyl]pyrido[2,3-d]pyridazin-5(6H)-one;
7-(2-chlorophenoxy)-5-{[5-(piperazin-l-yl)pyridin-2-yl]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
2-(2-cyclopropylethyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one;
(4-{ [7-(2-chlorophenoxy)-4-hydroxypyrido[3,4-d]pyridazin-5-yl]amino}-3- methoxyphenyl)(pyrrolidin-l -yl)methanone;
7-(2-chlorophenoxy)-5-{[2-ethoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[3.4- d]pyridazin-4(3H)-one;
2-(2-nuorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2.3- d]pyridazin-5(6H)-one;
2-(2,3-dichlorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one;
2-(2,6-difluorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d|pyridazin-5(6H)-one;
2-(2,5-difluorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]arnino}pyrido[2,3- d]pyridazin-5(6H)-one;
2-(2,3-difluorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2.3- d]pyridazin-5(6H)-one;
2-(2-chloro-6-fluorobenzyl)-4-{ [2-methoxy-4-(piperidin-4- yl)phenyl]amino}pyrido[2,3-d]pyridazin-5(6H)-one;
5- [(2-methoxyphenyl)amino]-7-{[4-(piperazin- l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol;
7-(2-chlorophenoxy)-5-{ [2-ethoxy-4-(piperazin- l - l)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol;
2-[(5-{ [2-methoxy-4-(piperazin- l -yl)phenyl]amino} -4-oxo-3 ,4-dihydropy rido[3,4- d]pyridazin-7-yl)oxy]benzonitrile;
2-(2-chlorobenzyl)-4-({2-methoxy-4-[(4-methylpiperazin- l - y l)methy l]pheny 1 } amino)py rido [2,3 -d]py ridazin-5 (6H) -one ;
7-(2-chlorophenoxy)-5-{ [2-(difluoromethoxy)-4-(piperaziii-l- y l)pheny ljamino }py rido [3 ,4-d]py ridazin-4(3 H)-one :
7-(2-chlorophenoxy)-5-{ f5-(piperidin-4-yl)pyridin-2-yl]arnino}pyrido[3.4- d]py ridazin-4(3 H)-one ; 7-(2-chlorophenoxy)-5-{[2-methoxy-4-(piperazin- l -yl)phenyl]amino}-l - methylpyrido[3,4-d]pyridazin-4-ol; and
2-{ [7-(2-chlorophenoxy)-4-hydroxypyrido[3.4-d]pyridazin-5-yl]amino}-5-(piperazin- l -yl)benzonitrile.
Compounds of this invention may contain asymmetrically substituted carbon atoms in the R or S configuration, wherein the terms "R" and "S" are as defined in Pure Appl. Chem. (1976) 45, 13-10. Compounds having asymmetrically substituted carbon atoms with equal amounts of R and S configurations are racemic at those atoms. Atoms having excess of one configuration over the other are assigned the configuration in excess, preferably an excess of about 85%-90%, more preferably an excess of about 95%-99%, and still more preferably an excess greater than about 99%. Accordingly, this invention is meant to embrace racemic mixtares and relative and absolute diastereoisomers of the compounds thereof.
Compounds of this invention may also contain carbon-carbon double bonds or carbon-nitrogen double bonds in the E or Z configuration, wherein the term Έ" represents higher order substituents on opposite sides of the carbon-carbon or carbon-nitrogen double bond and the term "Z" represents higher order substituents on the same side of the carbon- carbon or carbon-nitrogen double bond as determined by the Cahn-Ingold-Prelog Priority Rules. The compounds of this invention may also exist as a mixture of "E" and "Z" isomers.
Additional geometric isomers may exist in the present compounds. For example, the invention contemplates the various geometric isomers and mixtures thereof resulting from the disposition of substituents around a cycloalkyl group or a heterocycle group. Substituents around a cycloalkyl or a heterocycle are designated as being of cis or trans configuration.
Compounds of this invention may also exist as tautomers or equilibrium mixtures thereof wherein a proton of a compound shifts from one atom to another. Examples of tautomers include, but are not limited to, keto-enol, phenol-keto, oxime-nitroso, nitro-aci, imine-enamine and the like. Tautomeric forms are intended to be encompassed by the scope of this invention, even though only one tautomeric form may be depicted.
This invention also is directed, in part, to all salts of the compounds of formula (I). A salt of a compound may be advantageous due to one or more of the salt's properties, such as. for example, enhanced pharmaceutical stability in differing temperatures and humidities, or a desirable solubility in water or other solvents. Where a salt is intended to be administered to a patient (as opposed to, for example, being in use in an in vitro context), the salt preferably is pharmaceutically acceptable and/or physiologically compatible. The term
"pharmaceutically acceptable" is used adjectivally in this patent application to mean that the modified noun is appropriate for use as a pharmaceutical product or as a part of a pharmaceutical product. Pharmaceutically acceptable salts include salts commonly used to form alkali metal salts and to form addition salts of free acids or free bases. In general, these salts typically may be prepared by conventional means by reacting, for example, the appropriate acid or base with a compound of the invention.
Pharmaceutically acceptable acid addition salts of the compounds of formula (I) can be prepared from an inorganic or organic acid. Examples of often suitable inorganic acids include hydrochloric, hydrobromic, hydroiodic, nitric, carbonic, sulfuric, and phosphoric acid. Suitable organic acids generally include, for example, aliphatic, cycloaliphatic, aromatic, araliphatic, heterocyclic, carboxylic, and sulfonic classes of organic acids. Specific examples of often suitable organic acids include acetate, trifluoroacetate, formate, propionate, succinate, glycolate, gluconate, digluconate, lactate, malate. tartaric acid, citrate, ascorbate. glucuronate, maleate. fumarate, pyruvate, aspartate, glutamate, benzoate, anthranilic acid, mesylate, stearate. salicylate, p-hydroxybenzoate, phenylacetate. mandelate, embonate (pamoate), ethanesulfonate, benzenesulfonate, pantothenate, 2-hydroxyethanesulfonate, sulfanilate, cyclohexylaminosulfonate, algenic acid, beta-hydroxy butyric acid, galactarate, galacturonate, adipate, alginate, bisulfate, butyrate, camphorate, camphorsulfonate, cyclopentanepropionate, dodecylsulfate, glycoheptanoate, glycerophosphate, heptanoate, hexanoate, nicotinate, oxalate, palmoate, pectinate, 2-naphthalesulfonate, 3- phenylpropionate, picrate. pivalate. thiocyanate. tosylate. and undecanoate.
Pharmaceutically acceptable base addition salts of the compounds of formula (1) include, for example, metallic salts and organic salts. Preferred metallic salts include alkali metal (group la) salts, alkaline earth metal (group Ila) salts, and other physiologically acceptable metal salts. Such salts may be made from aluminum, calcium, lithium, magnesium, potassium, sodium, and zinc. Preferred organic salts can be made from amines, such as tromethamine, diethylamine, Ν,Ν'-dibenzylethylenediamine, chloroprocaine, choline, diethanolamine, ethylenediamine, meglumine (N-methylglucamine), and procaine. Basic nitrogen-containing groups can be quaternized with agents such as lower alkyl (C1-C6) halides (e.g., methyl, ethyl, propyl, and butyl chlorides, bromides, and iodides), dialkyl sulfates (e.g., dimethyl, diethyl, dibutyl. and diamyl sulfates), long chain halides (e.g.. decyl, lauryl, myristyl, and stearyl chlorides, bromides, and iodides), arylalkyl halides (e.g., benzyl and phenethyl bromides), and others.
Compounds of formula (I) (and salts thereof) with any level of purity (including pure and substantially pure) are within the scope of Applicants' invention. The term "substantially pure" in reference to a compound/saMsomer, means that the preparation/composition containing the compound/salt/isomer contains more than about 85% by weight of the compound/salt/isomer, preferably more than about 90% by weight of the
compound/salt/isomer, preferably more than about 95% by weight of the
compound/salt/isomer, preferably more than about 97% by weight of the
compound/salt/isomer. and preferably more than about 99% by weight of the
compound/salt/isomer.
Preparation of Compounds
Compounds of this invention may be made by synthetic chemical processes, examples of which are shown herein. It is meant to be understood that the order of the steps in the processes may be varied, that reagents, solvents and reaction conditions may be substituted for those specifically mentioned, and that vulnerable moieties may be protected and deprotected, as necessary.
Protecting groups for C(0)OH moieties include, but are not limited to. acetoxymethyl. ally 1, benzoylmethyl, benzyl, benzy loxymethy l. tert-butyl. tert-butyldipheny lsilyl, diphenylmethyl, cyclobutvl. cyclohexyl, cyclopentvl, cyclopropyl, diphenylmethvlsilyl, ethyl, para-methox benzyl, methoxymethyl, methoxyethoxymethyl, methyl, methylthiomethyl. naphthyl, para-nitrobenzyl, phenyl, n-propyl, 2,2,2-trichIoroethyl, triethy Isily I, 2- (trimethylsilyl)ethyl, 2-(trimethylsilyl)ethoxymethyl, triphenylmethyl and the like.
Protecting groups for C(O) and C(0)H moieties include, but are not limited to,
1.3- dioxylketal, diethylketal, dimethylketal, 1 ,3-dithianylketal, O-methyloxime,
O-phenyloxime and the like.
Protecting groups for NH moieties include, but are not limited to. acetyl, alany l. benzoyl. benzyl (phenylmethyl). benzylidene, benzyloxycarbonv l (Cbz). tert-butoxycarbonyl (Boc). 3,4-dimethoxybenzyloxycarbonyl, diphenylmethyl, dipheny lphosphoryl, formyl.
methanesulfonyl, para-methoxybenzyloxycarbonyl, phenylacetyl, phthaloyl, succinyl, trichloroethoxycarbonyl, triethylsilyl, trifhioroacetyl, trimethy lsily 1, triphenylmethyl, triphenylsilyl, para-toluenesulfonyl and the like.
Protecting groups for OH and SH moieties include, but are not limited to, acetyl, allyl, allyloxycarbonyl, benzy loxycarbon l (Cbz), benzoyl, benzyl, tert-butyl,
tert-butyldimethy lsily 1. tert-butyldiphenylsilyl, 3.4-dimethoxybenzyl.
3.4- dimethoxy benzy loxycarbonyl, l , l -dimethyI-2-propenyl, diphenylmethyl, formyl.
methanesulfonyl, methoxyacetyl, 4-methoxybenzylo.xycarbonyl, para-methoxy benzyl, methoxycarbonyl, methyl, para-toluenesulfonyl, 2,2,2-trichloroethoxycarbonyl, 2,2,2-trichloroethyl, triethylsilyl, trifluoroacetyl, 2-(trimethylsilyl)ethoxycarbonyl, 2-trimethylsilylethyl, triphenylmethyl, 2-(triphenylphosphonio)ethoxycarbonyl and the like. Schemes
Figure imgf000048_0001
As shown in Scheme 1, compounds of formula (1), wherein A, Z, R1 and n are as described herein, can be reacted at room temperature with Ν,Ν-carbonyldiimidazole in a solvent such as, but not limited to, dry tetrahydrofuran, followed by the addition magnesium chloride and ethyl potassium malonate at elevated temperature, to provide compounds of formula (2). Compounds of formula (3) can be prepared from compounds of formula (2) by reacting the latter with ammonium acetate, magnesium sulfate, and sodium
cyanoborohydride. The reaction is typically performed in a solvent such as. but not limited to, methanol at elevated temperatures. Compounds of formula (4) can be prepared by reacting compounds of formula (3) with acetic acid, ethyl acetoacetate, and magnesium sulfate. The reaction is typically performed at elevated temperature, in a solvent such as but not limited to toluene. Compounds of formula (4) can be reacted with a base such as, butnot limited to, potassium t-butoxide at ambient temperature in a solvent such as but not limited to tetrahydrofuran. to provide compounds of formula (5). Compounds of formula (6) can be prepared by reacting compounds of formula (5) with 2,3-dichloro-5,6-dicyano- l ,4- benzoquinone. A solvent such as but not limited to tetrahydrofuran is typically employed. Compounds of formula (6) can be reacted with phosphorus oxychloride to provide compounds of formula (7). The reaction is typically performed at elevated temperature. Compounds of formula (8) can be prepared from compounds of formula (7) by reacting the latter with compounds of formula (7A), wherein B, R2, R3, and m are as described herein, in the presence of p-toluenesulfonic acid. The reaction is typically performed at elevated temperature in a solvent such as but not limited to n-butanol. Compounds of formula (9), which are representative of the compounds of this invention, can be prepared by reacting compounds of formula (8) with sodium hydride, followed by 1 ,3.5-triazine at elevated temperature. The reaction is typically performed in a solvent such as but not limited to N.N- dimethylform amide.
Scheme 2
Figure imgf000049_0001
Potassium hydroxide can be added to a solution of 2-cyanoacetamide and ethyl 3- oxobutanoate in a solvent such as but not limited to methanol to provide 2,6-dihydroxy-4- methylnicotinonitrile, as shown in Scheme 2. The reaction is typically performed at elevated temperature. 2,6-Dihydroxy-4-methylnicotinonitrile and phosphorus oxychloride can heated in a sealed tube without an additional solvent to provide 2.6-dichloro-4-methylnicotinonitrile. Ν,Ν-Dimethylformamide dimethyl acetal can be added to a solution of 2,6-dichloro-4- mewylnicotinonitrile in a solvent such as but not limited to N,N-dimethylformarnide to provide (E)-2,6-dichloro-4-(2-(dimethylamino)vinyl)nicotinonitrile. The reaction is typically performed at an elevated temperature. Concentrated hydrochloric acid and (E)-2,6-dichloro- 4-(2-(dimethylamino)vinyl)nicotinonitrile can be heated in a sealed tube to provide 6,8- dichloro-2,7-naphthyridin-l(2H)-one (10). Compounds of formula (1 1) can be prepared from compounds of formula (10) by reacting the latter with compounds of formula (7A), wherein B, R2, R3, and m are as described herein, in a solvent such as but not limited to N- methylpyrrolidone. The reaction is typically performed at elevated temperature and may be performed in a microwave oven. Compounds of formula (12), which are representative of the compounds of this invention, can be prepared by reacting compounds of formula (1 1) with an organozinc compound of formula (1 1 A), wherein Z, A, R1 , and n are as described herein and X2 is a halide. The reaction typically involves the use of heat and a nickel or palladium catalyst such as but not limited to bis(triphenylphosphine)palladium(II) dichloride in a solvent such as but not limited to N-methylpyrrolidone, tetrahydrofuran, or mixtures thereof.
Figure imgf000050_0001
shown in Scheme 3, 2,6-dihydroxypyridine-4-carboxylic acid and phosphoryl trichloride can be heated in a sealed tube to provide 2,6-dichloropyridine-4-carboxylic acid.
Diphenylphosphoryl azide and a base such as but not limited to N,N-diisopropylethylamine in tert-butanol (200 mL) can be added to 2,6-dichloropyridine-4-carboxylic acid to provide tert-butyl 2,6-dichloropyridin-4-ylcarbamate. The reaction typically requires the use of heat.
Carboxylation of tert-butyl 2.6-dichloropyridin-4-ylcarbamate to provide 4-(tert- butoxycarbonylamino)-2,6-dichloronicotinic acid can be performed by bubbling dry carbon dioxide gas through a solution of tert-butyl 2,6-dichloropyridin-4-ylcarbamate and Ν,Ν.Ν',Ν'- tetramethylethylenediamine treated with n-butyl lithium. The n-butyl lithium is typically added at low temperature to a mixture of tert-butyl 2,6-dichloropyridin-4-ylcarbamate and Ν,Ν,Ν',Ν'-tetramethylethylenediamine in a solvent such as but not limited to
tetrathydrofuran. before adding the carbon dioxide and warming to room temperature. A solution of 4-(tert-Butoxycarbonylamino)-2,6-dichloronicotinic acid and 1 , 1 '- carbonyldiimidazole in solvent such as but not limited to Ν,Ν-dimethylformamide can be stirred at elevated temperature before the addition of ammonia gas at reduced temperature to provide 4-amino-2,6-dichloropyridine-3-carboxamide. Triethyl orthoformate can be reacted with 4-amino-2,6-dichloropyridine-3-carboxamide to provide 5,7-dichloropyrido[4,3- d]pyrimidin-4(3H)-one. The reaction typically involves the use of heat and a solvent such as but not limited to Ν,Ν-dimethylformamide. 5,7-Dichloropyrido[4,3-d]pyrimidin-4(3H)-one can be reacted with a compound of formula (7A) , wherein B. R2, R3, and m are as described herein, in the presence of a base such as but not limited to triethylamine, to provide compounds of formula ( 13). The reaction is typically performed at elevated temperature in a solvent such as but not limited to 1 ,4-dioxane. Compounds of formula ( 14), which are representative of the compounds of this invention, can be prepared by reacting compounds of formula (13) with an organozinc compound of formula (1 1A), wherein Z, A, R1 , and n are as described herein and X2 is a halide. The reaction typically involves the use of heat and a nickel or palladium catalyst such as but not limited to bis(triphenylphosphine)palladium(II) dichloride in a solvent such as but not limited to N-methylpyrrolidone, tetrahydrofuran, or mixtures thereof. Compounds of formula (15). which are also representative of the compounds of this invention, can be prepared by reacting compounds of formula ( 14) with a reducing agent such as but not limited to sodium borohydride or sodium cyanoborohydride. The reaction is typically performed at elevated temperature, in a solvent such as but not limited to tetrahydrofuran, methanol, and the like, or mixtures thereof.
Scheme 4
Figure imgf000052_0001
Carboxylation of 2.6-dibromopyridine to provide 2,6-dibromonicotinic acid and 2.6- dibromoisonicotinic acid can be performed by bubbling dry carbon dioxide gas to a solution of 2,6-dibromopyridine and diisopropylamine treated with n-butyl lithium. The n-butyl lithium is typically added at low temperature to a mixture of 2,6-dibromopyridine and diisopropylamine in a solvent such as but not limited to tetrathydrofuran, before adding the carbon dioxide gas and warming to room temperature. A mixture of 2,6-dibromonicotinic acid and 2,6-dibromoisonicotinic acid can be added at low temperature to a solution of a base, such as, but not limited to, 2,2,6,6-tetramethylpiperidine, in a solvent, such as, but not limited to, tetrahydrofuran. and n-butyllithium to provide 4,6-dibromo- l -hydroxyfuro[3,4- c)pyridin-3( l H)-one and 4.6-dibromo-3-hydroxyfuro[3,4-c]pyridin-l (3H)-one. The reaction is typically stirred at low temperature for several hours before the addition of N,N- dimethylformamide. A mixture of 4,6-dibromo-l -hydroxyfuro[3,4-c]pyridin-3( l H)-one and 4,6-dibromo-3-hydroxyfuro[3,4-c]pyridin-l (3H)-one can be reacted with hydrazine hydrochloride in the presence of a base such as but not limited to triethylamine to provide, after purification, 5,7-dibromopyrido[3,4-d]pyridazin-4-ol. The reaction typically requires an elevated temperature and maybe performed in a solvent such as but not limited to isopropanol. 5,7-Dibromopyrido[3,4-d]pyridazin-4-ol can be reacted with a compound of formula (7 A) , wherein B, R2, R3, and m are as described herein, in the presence of a base such as but not limited to diisopropylethylamine or trieth lamine, to provide compounds of formula (1 ). The reaction is typically performed at elevated temperature in a solvent such as but not limited to 1 ,4-dio.xane. Compounds of formula ( 17), which are representative of the compounds of this invention, can be prepared by reacting compounds of formula (16) with an organozinc compound of formula (1 1 A), wherein Z, A, R1 , and n are as described herein and X2 is a halide. The reaction typically involves the use of heat, copper(I) iodide, and a nickel or palladium catalyst such as but not limited to 1 , l '-bis(diphenylphosphino)ferrocene- palladium(II) dichloride in a solvent such as but not limited to N-methylpyrrolidone, tetrahydrofuran, or mixtures thereof.
Scheme 5
Figure imgf000053_0001
As shown in Scheme 5, 2,6-dichloropyridine 1-oxide can be prepared by reacting a solution of 2,6-dichloropyridine, 30% hydrogen peroxide, and an acid such as but not limited to trifluoroacetic acid at elevated temperature. 2,6-Dichloropyridine 1-oxide can be reacted with phosphorus oxychloride at elevated temperature to provide 2,4,6-trichloropyridine. Carbo ylation of 2,4.6-trichloropyridine to provide 2,4.6-trichloronicotinic acid can be performed by adding solid carbon dioxide (dry ice) to a solution of 2,4.6-trichloropyridine and diisopropylamine treated with n-butyl lithium. The n-butyl lithium is typically added at low temperature to a mixture of 2.4,6-trichloropyridine and diisopropylamine in a solvent such as but not limited to tetrathydrofuran, before adding the carbon dioxide gas and warming to room temperature. tert-Butyl 2-(2,4,6-trichloronicotinamido)ethylcarbamate can be prepared from 2,4,6-trichloronicotinic acid by reacting the latter first with oxalyl chloride at low temperature in a solvent such as but not limited to dichloromethane, N,N- dimethylformamide, or mixtures thereof. The resulting crude acid chloride can be reacted with tert-butyl 2-aminoethylcarbamate in the presence of a base such as but not limited to triethylamine at low temperature in a solvent such as but not limited to dichloromethane to provide tert-butyl 2-(2,4,6-trichloronicotinamido)ethylcarbamate. tert-Butyl 2-(2,4 >- trichloronicotinamido)ethylcarbamate can be treated with an acid such as but not limited to trifluoroacetic acid in a solvent such as but not limited to dichloromethane, to provide N-(2- aminoethyl)-2,4,6-trichloronicotinamide. 6,8-Dichloro-l ,2,3,4-tetrahydropyrido[2,3- e][ l,4]diazepin-5-one can be prepared by reacting N-(2-aminoethyl)-2,4,6- trichloronicotinamide with cesium fluoride in the presence of a base such as but not limited to triethylamine. The reaction typically requires the use of heat and is performed in a solvent such as but not limited to Ν,Ν-dimethylformamide. 6,8-Dichloro-l ,2,3,4- tetrahydropyrido[2,3-e][ l ,4]diazepin-5-one can be reacted with a compound of formula (7A) . wherein B, R2, R3, and m are as described herein, in the presence of a base such as but not limited to diisopropylethylamine or triethylamine, to provide compounds of formula ( 18). The reaction is typically performed at elevated temperature in a solvent such as but not limited to 1,4-dioxane. Compounds of formula (1 ), which are representative of the compounds of this invention, can be prepared by reacting compounds of formula (18) with an organozinc compound of formula (1 1 A), wherein Z, A, R1 , and n are as described herein and X2 is a halide. The reaction typically involves the use of heat, and a nickel or palladium catalyst such as but not limited to tetrakis(triphenylphosphine)palladium in a solvent such as but not limited to N-methylpyrrolidone, tetrah drofuran, or mixtures thereof. Additionally, the reaction may be performed in a microwave oven.
Scheme 6
Figure imgf000055_0001
2,4,6-Trichloronicotinic acid, which can be prepared as described in Scheme 5, can be treated at ambient temperature with oxalyl chloride in a solvent such as but not limited to dichloromethane, Ν,Ν-dimethylformamide, or mixtures thereof. Ammonia gas can be bubbled through a solution of the crude acid chloride in a solvent such as but not limited to tetrahydrofuran to provide 2,4,6-trichloronicotinamide. 2-Amino-4,6-dichloronicotinamide can be prepared by reacting 2,4,6-trichloronicotinamide w ith ammonia. The reaction is typically performed at elevated temperature in a solvent such as but not limited to 1 ,4- dioxane. 2-Amino-4,6-dichloronicotinamide can be reacted with triethyl orthoformate at elevated temperature to provide 5,7-dichloropyrido[2,3-d]pyrimidin-4(3H)-one. 5,7-
Dichloropyrido[2,3-d]pyrimidin-4(3H)-one can be reacted with a compound of formula (7A). wherein B, R2, R3, and m are as described herein, in the presence of a base such as but not limited to diisopropylethylamine or triethylamine, to provide compounds of formula (20). The reaction is typically performed at elevated temperature in a solvent such as but not limited to 1 ,4-dioxane. Compounds of formula (21), which are representative of the compounds of this invention, can be prepared by reacting compounds of formula (20) with an organozinc compound of formula (1 1A), wherein Z, A, R1 , and n are as described herein and X2 is a haiide. The reaction typically involves the use of heat, and a nickel or palladium catalyst such as but not limited to tetrakis(triphenylphosphine)palladium in a solvent such as but not limited to N-methylpyrrolidone, tetrahydrofuran, or mixtures thereof.
Scheme 7
Figure imgf000056_0001
Carboxylation of 2,4,6-trichloropyrimidine to provide 2,4,6-trichloropyrimidine-5- carboxylic acid can be performed by adding solid carbon dioxide (dry ice) to a solution of 2,4,6-trichloropyridine and diisopropylamine treated with n-butyl lithium. The n-butyl lithium is typically added at low temperature to a mixture of 2.4,6-trichloropyridine and diisopropylamine in a solvent such as but not limited to tetrahydrofuran. before adding the carbon dioxide gas and warming to room temperature. 4-Amino-2,6-dichloropyrimidine-5- carboxamide can be prepared from 2.4,6-trichloropyrimidine-5-carboxylic acid by reacting the latter first with oxalyl chloride at low temperature in a solvent such as but not limited to dichloromethane, Ν,Ν-dimethylformamide, or mixtures thereof. The resulting crude acid chloride can be reacted with ammonium hydroxide at low temperature in a solvent such as but not limited to tetrahydrofuran to provide 4-amino-2,6-dichloropyrimidine-5-carboxamide. 4-Amino-2,6-dichloropyrimidine-5-carboxamide can be reacted with a compound of formula (7 A) , wherein B, R\ R3, and m are as described herein, in the presence of a base such as but not limited to diisopropylethylamine or triethylamine, to provide compounds of formula (22). The reaction is typically performed at elevated temperature in a solvent such as but not limited to 1 ,4-dioxane. Triethyl orthoformate can be reacted with compounds of formula (22) to provide compounds of formula (23), The reaction typically involves the use of heat and may employ a solvent such as but not limited to Ν,Ν-dimethylformamide. Compounds of formula (24), which are representative of the compounds of this invention, can be prepared by reacting compounds of formula (23) with an organozinc compound of formula (1 1 A), wherein Z, A, R1, and n are as described herein and X2 is a halide. The reaction typically involves the use of heat, and a nickel or palladium catalyst such as but not limited to bis(triphenylphosphine)palladium(II) dichloride in a solvent such as but not limited to N- methylpyrrolidone, tetrahydrofuran, or mixtures thereof. Compositions
In another aspect, the present invention provides pharmaceutical compositions for modulating kinase activity in a humans and animals that will typically contain a compound of formula (I) and a pharmaceutically acceptable carrier.
Compounds having formula (I) may be administered, for example, bucally, ophthalmic ally, orally, osmotically, parenterally (intramuscularly, intraperintoneally intrasternally, intravenously, subcutaneously), rectally, topically, transdermally, vaginally and intraarterially as well as by intraarticular injection, infusion, and placement in the body, such as, for example, the vasculature.
Compounds having formula (I) may be administered with or without an excipient.
Excipients include, but are not limited to, encapsulators and additives such as absorption accelerators, antioxidants, binders, buffers, coating agents, coloring agents, diluents, disintegrating agents, emulsifiers, extenders, fillers, flavoring agents, humectants, lubricants, perfumes, preservatives, propellants, releasing agents, sterilizing agents, sweeteners, solubilizers, wetting agents, mixtures thereof and the like.
Excipients for preparation of compositions comprising a compound having formula (I) to be administered orally include, but are not limited to, agar, alginic acid, aluminum hydroxide, benzyl alcohol, benzyl benzoate, 1 ,3-butylene glycol, carbomers, castor oil, cellulose, cellulose acetate, cocoa butter, corn starch, corn oil, cottonseed oil, cross-povidone, diglycerides, ethanol, ethyl cellulose, ethyl laureate, ethyl oleate, fatty acid esters, gelatin, germ oil, glucose, glycerol, groundnut oil, hydroxypropylmethyl celluose, isopropanol, isotonic saline, lactose, magnesium hydroxide, magnesium stearate, malt, mannitol, monoglycerides, olive oil, peanut oil, potassium phosphate salts, potato starch, povidone, propylene glycol, Ringer's solution, safflower oil, sesame oil. sodium carboxymethyl cellulose, sodium phosphate salts, sodium lauryl sulfate, sodium sorbitol, soybean oil, stearic acids, stearyl fumarate, sucrose, surfactants, talc, tragacanth, tetrahydrofurfuryl alcohol, triglycerides, water, mixtures thereof and the like. Excipients for preparation of compositions comprising a compound having formula (I) to be administered ophthalmically or orally include, but are not limited to, 1 ,3-butylene glycol, castor oil, corn oil, cottonseed oil, ethanol, fatty acid esters of sorbitan, germ oil, groundnut oil, glycerol, isopropanol, olive oil, polyethylene glycols, propylene glycol, sesame oil, water, mixtures thereof and the like. Excipients for preparation of compositions comprising a compound having formula (I) to be administered osmotically include, but are not limited to, chlorofluorohydrocarbons. ethanol. water, mixtures thereof and the like. Excipients for preparation of compositions comprising a compound having formula (I) to be administered parenterally include, but are not limited to, 1 ,3-butanediol, castor oil, corn oil, cottonseed oil, dextrose, germ oil, groundnut oil, liposomes, oleic acid, olive oil. peanut oil, Ringer's solution, safflower oil, sesame oil, soybean oil, U.S. P. or isotonic sodium chloride solution, water, mixtures thereof and the like. Excipients for preparation of compositions comprising a compound having formula (I) to be administered rectally or vaginally include, but are not limited to, cocoa butter, polyethylene glycol, wax, mixtures thereof and the like.
The pharmaceutical composition and the method of the present invention may further comprise other therapeutically active compounds as noted herein which are usually applied in the treatment of the above-mentioned pathological conditions.
Methods of Use
In another aspect, the present invention provides methods of using a compound or composition of the invention to treat or prevent a disease or condition involving mediation, overexpression or disregulation of kinases in a mammal. In particular, compounds of this invention are expected to have utility in treatment of diseases or conditions during which protein kinases such as any or all CDC-7 family members are expressed.
In one group of embodiments, diseases and conditions of humans or other animals that can be treated with inhibitors of kinases, include, but are not limited to. acoustic neuroma, acute leukemia, acute lymphocytic leukemia, acute myelocytic leukemia
(monocytic, myeloblastic, adenocarcinoma, angiosarcoma, astrocytoma, myelomonocytic and promyelocytic), acute t-cell leukemia, basal cell carcinoma, bile duct carcinoma, bladder cancer, brain cancer, breast cancer, bronchogenic carcinoma, cervical cancer,
chondrosarcoma, chordoma, choriocarcinoma, chronic leukemia, chronic lymphocytic leukemia, chronic myelocytic (granulocytic) leukemia, chronic myleogeneous leukemia, colon cancer, colorectal cancer, craniopharyngioma, cystadenocarcinoma, diffuse large B-cell lymphoma, dysproliferative changes (dysplasias and metaplasias), embryonal carcinoma, endometrial cancer, endotheliosarcoma, ependymoma, epithelial carcinoma, erythroleukemia, esophageal cancer, estrogen-receptor positive breast cancer, essential thrombocythemia. Ewing's tumor, fibrosarcoma, follicular lymphoma, germ cell testicular cancer, glioma, heavy chain disease, hemangioblastoma, hepatoma, hepatocellular cancer, hormone insensitive prostate cancer, leiomyosarcoma, liposarcoma, lung cancer,
lymphagioendotheliosarcoma, lymphangiosarcoma, lymphoblastic leukemia, lymphoma (Hodgkin's and non-Hodgkin's), malignancies and hyperproliferative disorders of the bladder, breast, colon, lung, ovaries, pancreas, prostate, skin and uterus, lymphoid malignancies of T-cell or B-cell origin, leukemia, lymphoma, medullary carcinoma, medulloblastoma. melanoma, meningioma, mesothelioma, multiple myeloma, myelogenous leukemia, myeloma, myxosarcoma, neuroblastoma, non-small cell lung cancer,
oligodendroglioma, oral cancer, osteogenic sarcoma, ovarian cancer, pancreatic cancer. papillary adenocarcinomas, papillary carcinoma, pinealoma, polycythemia vera, prostate cancer, rectal cancer, renal cell carcinoma, retinoblastoma, rhabdomyosarcoma, sarcoma, sebaceous gland carcinoma, seminoma, skin cancer, small cell lung carcinoma, solid tumors (carcinomas and sarcomas), small cell lung cancer, stomach cancer, squamous cell carcinoma, synovioma, sweat gland carcinoma, thyroid cancer, Waldenstrom's
macroglobulinemia, testicular tumors, uterine cancer and Wilms' tumor.
The methods of the present invention typically involve administering to a subject in need of therapeutic treatment an effective amount of a compound of formula (I).
Therapeutically effective amounts of a compound having formula (I) depend on recipient of treatment, disease treated and severity thereof, composition comprising it. time of administration, route of administration, duration of treatment, potency, rate of clearance and whether or not another drug is co-administered. The amount of a compound having formula (I) used to make a composition to be administered daily to a patient in a single dose or in divided doses is from about 0.03 to about 200 mg/kg body weight. Single dose compositions contain these amounts or a combination of submultiples thereof.
Combination Therapy
The present invention further provides methods of using a compound or composition of the invention in combination with one or more additional active agents.
Compounds having Formula (I) are expected to be useful when used with alkylating agents, angiogenesis inhibitors, antibodies, antimetabolites, antimitotics, antiproliferatives, antivirals, aurora kinase inhibitors, apoptosis promoters (for example, Bcl-xL, Bcl-w and Bfl- 1 ) inhibitors, activators of death receptor pathway, Bcr-Abl kinase inhibitors, BiTE (Bi- Specific T cell Engager) antibodies, antibody drug conjugates, biologic response modifiers, cyclin-dependent kinase inhibitors, cell cycle inhibitors, cyclooxygenase-2 inhibitors, DVDs, leukemia viral oncogene homolog (ErbB2) receptor inhibitors, growth factor inhibitors, heat shock protein (HSP)-90 inhibitors, histone deacetylase (HDAC) inhibitors, hormonal therapies, immunologicals, inhibitors of inhibitors of apoptosis proteins (I APs), intercalating antibiotics, kinase inhibitors, kinesin inhibitors, Jak2 inhibitors, mammalian target of rapamycin inhibitors, microRNA's, mitogen-activated extracellular signal-regulated kinase inhibitors, multivalent binding proteins, non-steroidal anti-inflammatory drugs (NSAIDs), poly ADP (adenosine diphosphate)-ribose polymerase (PARP) inhibitors, platinum chemotherapeutics, polo-like kinase (Plk) inhibitors, phosphoinositide-3 kinase (PI3K) inhibitors, proteosome inhibitors, purine analogs, pyrimidine analogs, receptor tyrosine kinase inhibitors, etinoids/deltoids plant alkaloids, small inhibitory ribonucleic acids (siRNAs). topoisomerase inhibitors, ubiquitin ligase inhibitors, and the like, and in combination with one or more of these agents .
BiTE antibodies are bi-specific antibodies that direct T-cells to attack cancer cells by simultaneously binding the two cells. The T-cell then attacks the target cancer cell.
Examples of BiTE antibodies include adecatumumab (Micromet MT201), blinatumomab (Micromet MT 103) and the like. Without being limited by theory, one of the mechanisms by which T-cells elicit apoptosis of the target cancer cell is by exocytosis of cytolytic granule components, which include perforin and granzyme B. In this regard, Bcl-2 has been shown to attenuate the induction of apoptosis by both perforin and granzyme B. These data suggest that inhibition of Bcl-2 could enhance the cytotoxic effects elicited by T-cells when targeted to cancer cells (V. R. Sutton, D.L. Vaux and J. A. Trapani, J. of Immunology 1997, 158 ( 12), 5783).
SiRNAs are molecules having endogenous RNA bases or chemically modified nucleotides. The modifications do not abolish cellular activity, but rather impart increased stability and/or increased cellular potency. Examples of chemical modifications include phosphorothioate groups, 2'-deoxynucleotide, 2'-OCH3-containing ribonucleotides, 2'-F- ribonucleotides. 2'-methoxyethyl ribonucleotides, combinations thereof and the like. The siRNA can have vary ing lengths (e.g., 10-200 bps) and structures (e.g., hairpins, single/double strands, bulges, nicks/gaps, mismatches) and are processed in cells to provide active gene silencing. A double-stranded siRNA (dsRNA) can have the same number of nucleotides on each strand (blunt ends) or asymmetric ends (overhangs). The overhang of 1-2 nucleotides can be present on the sense and/or the antisense strand, as well as present on the 5'- and/ or the 3'-ends of a given strand.
Multivalent binding proteins are binding proteins comprising two or more antigen binding sites. Multivalent binding proteins are engineered to have the three or more antigen binding sites and are generally not naturally occurring antibodies. The term "multispecific binding protein" means a binding protein capable of binding two or more related or unrelated targets. Dual variable domain (DVD) binding proteins are tetravalent or multivalent binding proteins binding proteins comprising two or more antigen binding sites. Such DVDs may be monospecific (i.e., capable of binding one antigen) or multispecific (i.e., capable of binding two or more antigens). DVD binding proteins comprising two heavy chain DVD polypeptides and two light chain DVD polypeptides are referred to as DVD Ig's. Each half of a DVD Ig comprises a heavy chain DVD polypeptide, a light chain DVD polypeptide, and two antigen binding sites. Each binding site comprises a heavy chain variable domain and a light chain variable domain with a total of 6 CDRs involved in antigen binding per antigen binding site. Multispecific DVDs include DVD binding proteins that bind DLL4 and VEGF, or C-met and EFGR or ErbB3 and EGFR
Alkylating agents include altretamine, AMD-473. AP-5280. apaziquone, bendamustine, brostallicin, busulfan, carboquone, carmustine (BCNU), chlorambucil, CLORETAZINE® (laromustine, VNP 40101 M), cyclophosphamide, decarbazine, estramustine, fotemustine, glufosfamide, ifosfamide, KW-2170, lomustine (CCNU), mafosfamide, melphalan, mitobronitol, mitolactol, nimustine, nitrogen mustard N-oxide, ranimustine, temozolomide, thiotepa, TREANDA® (bendamustine), treosulfan, rofosfamide and the like.
Angiogenesis inhibitors include endothelial-specific receptor tyrosine kinase (Tie-2) inhibitors, epidermal growth factor receptor (EGFR) inhibitors, insulin growth factor-2 receptor (1GFR-2) inhibitors, matrix metalloproteinase-2 (MMP-2) inhibitors, matrix metalloproteinase-9 (MMP-9) inhibitors, platelet-derived growth factor receptor (PDGFR) inhibitors, thrombospondin analogs, vascular endothelial growth factor receptor tyrosine kinase (VEGFR) inhibitors and the like.
Antimetabolites include ALIMTA® (pemetrexed disodium, LY231514, MTA), 5-azacitidine, XELODA® (capecitabine), carmofur, LEUSTAT® (cladribine), clofarabine, cytarabine, cytarabine ocfosfate, cytosine arabinoside. decitabine, deferoxamine, doxifluridine, eflornithine. EICAR (5-ethvnyl- 1 - -D-ribofuranosylimidazole-4- carboxamide), enocitabine. ethnylcytidine, fludarabine, 5-fluorouracil alone or in combination with leucovorin, GEMZAR® (gemcitabine), hydroxyurea,
ALKERAN®(melphalan), mercaptopurine, 6-mercaptopurine riboside, methotrexate, mycophenolic acid, nelarabine, nolatrexed, ocfosfate, pelitrexol, pentostatin, raltitrexed, Ribavirin, triapine, trimetrexate, S-1 , tiazofurin, tegafur, TS-1 , vidarabine, UFT and the like.
Antivirals include ritonavir, hydroxychloroquine and the like
Aurora kinase inhibitors include ABT-348, AZD- 1 152, MLN-8054, VX-680, Aurora A-specific kinase inhibitors, Aurora B-specific kinase inhibitors and pan-Aurora kinase inhibitors and the like. Bcl-2 protein inhibitors include AT- 101 ((-)gossypol). GENASENSE (G3139 or oblimersen (Bcl-2 -targeting antisense oligonucleotide)), IPI-194, IP1-565, N-(4-(4-((4'- chloro(l, l'-biphenyl)-2-yl)methyl)piperazin-l -yl)benzoyl)-4-(((lR)-3-(dimethylamino)-l - ((phenylsulfany l)methyl)propy l)amino)-3-nitrobenzenesulfonamide) (ABT-737), N-(4-(4-((2- (4-chlorophenyl)-5,5-dimethyl-l-cyclohex-l-en-l -yl)methyl)piperazin-l -yl)benzoyl)-4- (((l R)-3-(morpholin-4-yl)-l-((phenylsulfanyl)methyl)propyl)amino)-3- ((trifluoromethyl)sulfonyl)benzenesulfonamide (ABT-263), GX-070 (obatoclax) and the like.
Bcr-Abl kinase inhibitors include DASATINIB® (BMS-354825), GLEEVEC® (imatinib) and the like.
CDK inhibitors include AZD-5438, BMI- 1040, BMS-032, BMS-387, CVT-2584, flavopyridol, GPC-286199, MCS-5A, PD0332991 , PHA-690509, seliciclib (CYC-202,
R-roscovitine), ZK-304709 and the like.
COX -2 inhibitors include ABT-963, ARCOXIA® (etoricoxib), BEXTRA®
(valdecoxib), BMS347070, CELEBREX® (celecoxib), COX-189 (lumiracoxib), CT-3, DERAMAXX® (deracoxib), JTE-522, 4-methyl-2-(3,4-dimethylphenyl)- l -(4- sulfamoylphenyl- l H-pyrrole), MK-663 (etoricoxib), NS-398, parecoxib, RS-57067,
SC-58125, SD-8381 , SVT-2016. S-2474, T-614. VIOXX® (rofecoxib) and the like.
EGFR inhibitors include ABX-EGF, anti-EGFR immunoliposomes, EGF-vaccine,
EMD-7200, ERBITUX® (cetuximab), HR3, IgA antibodies, IRESSA® (gefitinib),
TARCEVA® (erlotinib or OSI-774), TP-38, EGFR fusion protein, TY ERB® (lapatinib) and the like.
ErbB2 receptor inhibitors include CP-724-714, CI-1033 (canertinib), HERCEPTIN® (trastuzumab), TYKERB® (lapatinib), OMNITARG® (2C4, petuzumab), TAK- 165, GW-572016 (ionafarnib), GW-282974, EKB-569, PI- 166, dHER2 (HER2 vaccine), APC-8024 (HER-2 vaccine). anti-HER/2neu bispecific antibody, B7.her2IgG3. AS HER2 trifunctional bispecfic antibodies. mAB AR-2 9. mAB 2B- 1 and the like.
Histone deacetylase inhibitors include depsipeptide, LAQ-824, S-275, trapoxin, suberoylanilide hydroxamic acid (SAHA), TSA, valproic acid and the like.
HSP-90 inhibitors include 17-AAG-nab, 17-AAG, CNF- 101, CNF-1010, CNF-2024, 17-DM AG, geldanamycin, IPI-504, KOS-953, MYCOGRAB® (human recombinant antibody to HSP-90), NCS-683664, PU24FC1, PU-3, radicicol, SNX-21 12, STA-9090 VER49009 and the like.
Inhibitors of inhibitors of apoptosis proteins include HGS 1029, GDC-0145, GDC- 0152, LCL- 1 1. LBW-242 and the like. Antibody drug conjugates include anti-CD22-MC-MMAF, anti-CD22-MC-MMAE. anti-CD22-MCC-DM l . CR-01 1 -vcMMAE. PSMA-ADC, MEDI-547, SGN- 19Am SGN-35. SGN-75 and the like
Activators of death receptor pathway include TRAIL, antibodies or other agents that target TRAIL or death receptors (e.g., DR4 and DR5) such as Apomab, conatumumab,
ETR2-ST01 , GDC0145, (lexatumumab), HGS-1029, LBY-135, PRO-1762 and trastuzumab.
Kinesin inhibitors include Eg5 inhibitors such as AZD4877, ARRY-520; CENPE inhibitors such as GSK923295A and the like.
JAK-2 inhibitors include CEP-701 (lesaurtinib), XL019 and I CBO 18424 and the like.
ME inhibitors include ARRY- 142886, ARRY-438162 PD-325901. PD-98059 and the like.
mTOR inhibitors include AP-23573. CCI-779, everolimus, RAD-001 , rapamycin, temsirolimus, ATP-competitive TORC 1/TORC2 inhibitors, including PI- 103, PP242, PP30, Torin 1 and the like.
Non-steroidal anti-inflammatory drugs include AMIGESIC® (salsalate), DOLOBID® (diflunisal), MOTRIN® (ibuprofen), ORUDIS® (ketoprofen), RELAFEN® (nabumetone), FELDENE® (piroxicam), ibuprofen cream. ALEVE® (naproxen) and NAPROSYN® (naproxen), VOLTAREN® (diclofenac), INDOCIN® (indomethacin). CLINORIL® (sulindac), TOLECTIN® (tolmetin), LODINE® (etodolac), TORADOL® (ketorolac), DAYPRO® (oxaprozin) and the like.
PDGFR inhibitors include C-451 , CP-673, CP-868596 and the like.
Platinum chemotherapeutics include cisplatin, ELOXATIN® (oxaliplatin) eptaplatin, lobaplatin, nedaplatin, PARAPLATIN® (carboplatin), satraplatin, picoplatin and the like.
Polo-like kinase inhibitors include BI-2536 and the like.
Phosphoinositide-3 kinase (PI3K) inhibitors include wortmannin, LY294002, XL- 147, CAL-120, ONC-21. AEZS- 127. ETP-45658. PX-866. GDC-094 I , BGT226. BEZ235. XL765 and the like.
Thrombospondin analogs include ABT-510, ABT-567. ABT-898, TSP- 1 and the like. VEGFR inhibitors include AVASTIN® (bevacizurrrab), ABT-869, AEE-788,
ANGIOZYME™ (a ribozyme that inhibits angiogenesis (Ribozyme Pharmaceuticals (Boulder, CO.) and Chiron, (Emeryville, CA)) , axitinib (AG- 13736), AZD-2171 ,
CP-547,632, IM-862, MACUGEN (pegaptamib), NEXAVAR® (sorafenib, BAY43-9006), pazopanib (GW-786034), vatalanib (PTK-787, ZK-222584), SUTENT (sunitinib, SU- 1 1248), VEGF trap, ZACTIMA™ (vandetanib, ZD-6474), GA101 , ofatumumab, ABT-806 (mAb-806), ErbB3 specific antibodies, BSG2 specific antibodies, DLL4 specific antibodies and C-met specific antibodies, and the like.
Antibiotics include intercalating antibiotics aclarubicin, actinomycin D, amrubicin, annamycin, adriamycin, BLENOXANE® (bleomycin), daunorubicin, CAELYX® or
MYOCET® (liposomal doxorubicin), elsamitrucin, epirbucin, glarbuicin, ZAVEDOS® (idarubicin), mitomycin C, nemorubicin, neocarzinostatin, peplomycin, pirarubicin, rebeccamycin, stimalamer, streptozocin, VALSTAR® (valrubicin), zinostatin and the like.
Topoisomerase inhibitors include aclarubicin, 9-aminocamptothecin, amonafide, amsacrine, becatecarin, belotecan, BN-80915, CAMPTOSAR® (irinotecan hydrochloride), camptothecin, CARDIOXANE® (dexrazoxine), diflomotecan, edotecarin. ELLENCE® or PHARMORUBICIN® (epirubicin), etoposide, exatecan, 10-hydrox camptothecin. gimatecan, lurtotecan, mitoxantrone, orathecin, pirarbucin, pixantrone, rubitecan, sobuzoxane, SN-38, tafluposide, topotecan and the like.
Antibodies include AVASTIN® (bevacizumab), CD40-specific antibodies, chTNT- 1/B, denosumab, ERBITUX® (cetuximab), HUMAX-CD4® (zanolimumab), IGFlR-specific antibodies, lintuzumab, PANOREX® (edrecolomab), RENCAREX® (WX G250),
RITUXAN® (rituximab), ticilimumab, trastuzimab, CD20 antibodies types I and II and the like.
Hormonal therapies include AR1MIDEX® (anastrozole), AROMASIN® (exemestane). arzoxifene, CASODEX® (bicalutamide), CETROTIDE® (cetrorelix), degarelix, deslorelin, DESOPAN® (trilostane), dexamethasone, DROGENIL® (flutamide). EVISTA® (raloxifene). AFEMA™ (fadrozole), FARESTON® (toremifene), FASLODEX® (fulvestrant), FEMARA® (letrozole), formestane, glucocorticoids, HECTOROL® (doxercalciferol), RENAGEL® (sevelamer carbonate), lasofoxifene, leuprolide acetate, MEGACE® (megesterol),
MIFEPREX® (mifepristone), NILANDRON™ (nilutamide), NOLVADEX® (tamoxifen citrate), PLENAXIS™ (abarelix), prednisone, PROPECIA® (finasteride), rilostane,
SUPREFACT® (buserelin). TRELSTAR® (luteinizing hormone releasing hormone (LHRH)). VANTAS® (Histrelin implant), VETORYL® (trilostane or modrastane), ZOLADEX* (fosrelin, goserelin) and the like.
Deltoids and retinoids include seocalcitol (EB 1089. CB 1093), lexacalcitrol
( H 1060), fenretinide, PANRETIN® (aliretinoin), ATRAGEN® (liposomal tretinoin), TARGRETIN® (bexarotene), LGD-1550 and the like. PARP inhibitors include ABT-888 (veliparib), olaparib, KU-59436, AZD-2281 , AG- 014699, BSI-201 , BGP-15, INO-1001, ONO-2231 and the like.
Plant alkaloids include, but are not limited to, vincristine, vinblastine, vindesine, vinorelbine and the like.
Proteasome inhibitors include VELCADE® (bortezomib). MG132. NPI-0052, PR- 171 and the like.
Examples of immunologicals include interferons and other immune-enhancing agents. Interferons include interferon alpha, interferon alpha-2a, interferon alpha-2b, interferon beta, interferon gamma- l a, ACTIMMUNE® (interferon gamma- l b) or interferon gamma-n l , combinations thereof and the like. Other agents include ALFAFERONE® ,(IFN-ot), BAM- 002 (oxidized glutathione), BEROMU ® (tasonermin), BEXXAR® (tositumomab), CAMPATH® (alemtuzumab), CTLA4 (cytotoxic lymphocyte antigen 4), decarbazine, denileukin, epratuzumab, GRANOCYTE® (lenograstim), lentinan, leukocyte alpha interferon, imiquimod, MDX- 10 (anti-CTLA-4). melanoma vaccine, mitumomab.
molgramostim, MYLOTARG™ (gemtuzumab ozogamicin), NEUPOGEN® (filgrastim). OncoVAC-CL, OVAREX® (oregovomab), pemtumomab (Y-muHMFGl ). PROVENGE® (sipuleucel-T), sargaramostim, sizofilan, teceleukin, THERACYS® (Bacillus Calmette- Guerin), ubenimex, VIRULIZIN® (immunotherapeutic, Lorus Pharmaceuticals), Z-100 (Specific Substance of Maruyama (SSM)), WF-10 (Tetrachlorodecaoxide (TCDO)), PROLEUKIN® (aldesleukin), Z AD AX IN® (thymalfasin), ZENAPAX® (daclizumab), ZEVALIN® (9()Y-Ibritumomab tiuxetan) and the like.
Biological response modifiers are agents that modify defense mechanisms of living organisms or biological responses, such as survival, growth or differentiation of tissue cells to direct them to have anti-tumor activity and include krestin. lentinan, sizofiran, picibanil PF- 3512676 (CpG-8954), ubenimex and the like.
Pyrimidine analogs include cytarabine (ara C or Arabinoside C), cytosine arabinoside, doxifluridine, FLUDARA® (fludarabine), 5-FU (5-fluorouracil), floxuridine, GEMZAR® (gemcitabine), TOMUDEX® (ratitrexed), TROXATYL™ (triacetyluridine troxacitabine) and the like.
Purine analogs include LANVIS® (thioguanine) and PURI-NETHOL®
(mercaptopurine).
Antimitotic agents include batabulin, epothilone D (KOS-862), N-(2-((4- hydroxyphenyl)amino)pyridin-3-yl)-4-methoxybenzenesulfonamide, ixabepilone (BMS 247550), paclitaxel, TAXOTERE (docetaxel), PNU 100940 (109881 ), patupilone.
XRP-9881 (larotaxel), vinflunine, ZK-EPO (synthetic epothilone) and the like.
Ubiquitin ligase inhibitors include MDM2 inhibitors, such as nutlins, NEDD8 inhibitors such as MLN4924 and the like.
Compounds of this invention can also be used as radiosensitizers that enhance the efficacy of radiotherapy . Examples of radiotherapy include external beam radiotherapy, teletherapy, brachytherapy and sealed, unsealed source radiotherapy and the like.
Additionally, compounds having Formula (I) may be combined with other chemotherapeutic agents such as ABRAXAN E™ (ABI-007). ABT- 1 0 (farnesyl transferase inhibitor), ADVEXIN® (Ad5CM V-p53 vaccine), ALTOCOR® or EVACOR® (lovastatin), AMPLIGEN® (poly I :poly C12U, a synthetic RNA), APTOSY ® (exisulind), AREDIA® (pamidronic acid), arglabin, L-asparaginase, atamestane (l -methyl-3.17-dione-androsta-l ,4- diene), AVAGE® (tazarotene), AVE-8062 (combreastatin derivative) BEC2 (mitumomab), cachectin or cachexin (tumor necrosis factor), canvaxin (vaccine), CEAVAC® (cancer vaccine), CELEUK® (celmoleukin), CEPLENE® (histamine dihydrochloride), CERVARIX® (human papillomavirus vaccine), CHOP® (C: CYTOXAN® (cyclophosphamide), H:
ADR1 AMYCI ® (hydroxydoxorubicm): O: Vincristine (ONCOVIN®); P: prednisone), CYPAT™ (cyproterone acetate), combrestatin A4P, DAB(389)EGF (catalytic and translocation domains of diphtheria toxin fused via a His-Ala linker to human epidermal growth factor) or TransMID- 107R™ (diphtheria toxins), dacarbazine, dactinomycin. 5,6- dimethylxanthenone-4-acetic acid (DMXAA), eniluracil, EVIZON™ (squalamine lactate), DIMERICI E® (T4N5 liposome lotion), discodermolide, DX-8951 f (exatecan mesylate), enzastaurin, EPO906 (epithilone B), GARDASIL® (quadrivalent human papillomavirus (Types 6, 1 1, 16, 18) recombinant vaccine), GASTRIMMU E®, GENASENSE®, GMK (ganglioside conjugate vaccine). GVAX® (prostate cancer vaccine), halofuginone, histerelin, hydroxycarbamide, ibandronic acid, IGN- 101. IL-13-PE38, IL- 13-PE38QQR (cintredekin besudotox), IL-13-pseudomonas exotoxin, interferon-a, interferon-γ, JUNOVAN™ or MEPACT™ (mifamurtide), lonafarnib, 5, 10-methylenetetrahydrofolate, miltefosine (hexadecylphosphocholine), NEOVASTAT®(AE-941), NEUTREXIN® (rrimetrexate glucuronate), NIPENT® (pentostatin), ONCONASE® (a ribonuclease enzyme),
ONCOPHAGE® (melanoma vaccine treatment), ONCOVAX® (IL-2 Vaccine),
ORATHECIN™ (rubitecan), OSIDEM® (antibody -based cell drug), OVAREX® MAb (murine monoclonal antibody), paclitaxel, PANDIMEX™ (aglycone saponins from ginseng comprising 20(S)protopanaxadiol (aPPD) and 20(S)protopanaxatriol (aPPT)), panitumumab. PANVAC -VF (investigational cancer vaccine), pegaspargase. PEG Interferon A, phenoxodiol, procarbazine, rebimastat, REMOVAB® (catumaxomab), REVLIMID® (lenalidomide), RSR13 (efaproxiral). SOMATULINE® LA (lanreotide), SORIATANE® (acitretin), staurosporine (Streptomyces staurospores), talabostat (PT100), TARGRETIN® (bexarotene), TAXOPREXIN® (DHA-paclitaxel), TELCYTA® (canfosfamide, TLK286), temilifene, TEMODAR® (temozolomide), tesmilifene, thalidomide, THERATOPE® (STn- LH), thymitaq (2-amino-3,4-dihydro-6-methyl-4-oxo-5-(4-pyridylthio)quinazoline dihydrochloride), TNFERADE™ (adenovector: DNA carrier containing the gene for tumor necrosis factor-a). TRACLEER® or Z AVESCA® (bosentan), tretinoin (Retin-A), tetrandrine, TRISENOX® (arsenic trioxide). VIRULIZIN®. ukrain (derivative of alkaloids from the greater celandine plant), vitaxin (anti-alphavbeta3 antibody), XCYTRI ® (motexafin gadolinium), X INLAY™ (atrasentan), XYOTAX™ (paclitaxel poliglumex), YON DELIS® (trabectedin), ZD-6126, ZINECARD® (dexrazoxane), ZOMETA® (zolendronic acid), zorubicin and the like.
Examples
EXAMPLE 1
7-(2,6-dichlorobenzyl)-5-{ f2-methoxy-4-(piperazin-l -yl)phenyl]amino}-2,3- dihydropyrido[4,3-d]pyrimidin-4( lH)-one
EXAMPLE 1 A
2,6-dichloropyridine-4-carboxylic acid
A mixture of 2,6-dihydroxypyridine-4-carboxylic acid ( 15. 1 g, 100 mmol) and phosphoryl trichloride (45 ml) was heated for 6 hours at 160-165°C in a 200 mL sealed tube. After cooling to ambient temperature, the mixture was poured into crushed ice (300 g) and stirred for 1 hours. The mixture was extracted with ethyl acetate (5 x 60 mL) and the combined organic layers were dried over anhydrous sodium sulfate, filtered and concentrated in vacuo to give the of crude product which was recrystallized from 40 mL of 2/1 ethyl acetate/petroleum ether to afford the title compound. Ή NMR (DMSO-cfe) δ ppm 7.89 (s, 2H). MS; 192 (M+l).
EXAMPLE I B
tert-butyl 2,6-dichloropyridin-4-ylcarbamate
To a solution of the product of EXAMPLE 1A (18.0 g, 93.7 mmol) in anhydrous tert- butanol (200 mL) was added diphenylphosphoryl azide (27.1 g, 98 mmol) and N,N- diisopropylethylamine (24.2 g, 187.5 mmol) and the mixture was refluxed under nitrogen for 6 hours. The mixture was concentrated in vacuo and the residue was dissolved in ethyl acetate, washed with ammonium chloride solution and dried over sodium sulfate. Filtration, concentration of the filtrate, and purification by flash chromatography on silica gel using 10/1 petroleum ether/ethyl acetate afforded the title compound. Ή NMR (DMSO-c¾ δ ppm 10.33 (s, 1 H), 7.49 (s, 2H), 1 .48 (s, 9H).
EXAMPLE 1 C
4-(/eri-butoxycarbonylamino)-2,6-dichloronicotinic acid N.NN'N'-tetramethylethylenediamine (1.7 g, 14.7 mmol) was added to a solution of EXAMPLE I B (1.84 g, 7.0 mmol) in anhydrous tetrahydrofuran (35 mL). The mixture was degassed and recharged with nitrogen 4 times and cooled to -60°C. rc-Butyl lithium (6.4 mL, 16. 1 mmol) was added dropwise and the mixture stirred at -60°C for 2 hours. Dry carbon dioxide gas was bubbled into this solution and the mixture stirred overnight. The mixture was quenched with water and the solvent removed in vacuo. The residue was diluted with water and washed with 2/1 petroleum ether/ethyl acetate (2 x 20 mL). The aqueous phase was acidified to pH = 2 with concentrated hydrochloric acid and the mixture extracted with ethyl acetate. The combined organic layers were dried with sodium sulfate, filtered and concentrated in vacuo to give the title compound. Ή NMR (DMSO-<¾) δ ppm 9.83 (s, 1 H), 7.93 (s, 1H), 1.47 (s, 9H).
EXAMPLE I D
4-amino-2,6-dichloropyridine-3-carboxamide
To a solution of the product of EXAMPLE 1 C ( 1 1 .86 g. 38.6 mmol) of NN- dimethylformamide ( 120 mL) was added Ι , Γ-carbonyldiimidazole (6.89 g, 42.5 mmol) and the mixture was stirred at 60"C for 2 hours and then was cooled to 0-5°C. Ammonia gas was bubbled into the solution and the mixture was stirred overnight. The mixture was poured into 800 mL water and was extracted with ethyl acetate. The organic layers were dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (200-300 mesh) using 50/1 dichloromethane/methanol to afford the title compound. Ή NMR (DMSO-i/«) δ ppm 7.97 (brs., 1 H), 7.71 (brs., 1 H), 6.61 (s, 1H), 6.59 (brs., 2H).
EXAMPLE I E
5,7-dichloropyrido[4,3-tf]pyrimidin-4(3//)-one
A solution of the product of EXAMPLE I D (2.65 g, 13 mmol) in 15 mL of triethyl orthoformate was refluxed under nitrogen for 6 hours. After cooling to ambient temperature, the solid was filtered and washed with 1/1 petroleum ether/ethyl acetate (5 mL) to give the title compound. Ή NMR (DMSO-of,;) δ ppm 12.84 (br s, 1 H), 8.33 (s, 1 H), 7.72 (s, 1H). EXAMPLE I F
tert-butyl 4-(3-methoxy-4-nitrophenyl)piperazine-l-carboxylate A suspension of 4-fluoro-2-methoxy-l -nitrobenzene (15 g, 87 mmol), tert-butyl piperazine- l -carboxylate (19.59 g, 105.2 mmol) and potassium carbonate (24 g, 174 mmol) in N,N-dimethylformamide (1 0 mL) was heated at 8()°C for 8 hours. After cooling to ambient temperature, the mixture was poured in water (500 mL). The precipitate was filtered and washed with ethanol to give the title compound. MS: 338 (M+H+).
EXAMPLE 1 G
tert-butyl 4-(4-amino-3-methoxyphenyl)piperazine- l-carboxylate A suspension of EXAMPLE 13A (6.3 g, 18.7 mmol) and Raney nickel (2.0 g) in 300 mL methanol was stirred under hydrogen at ambient temperature for 5 hours. The mixture was filtered through diatomaceous earth and the filtrate was concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with a gradient of 2/1 to 1/1 petroleum/ethyl acetate to give the title compound.
EXAMPLE 1 H
5-(2-methoxy-4-(4-methylpiperazin-l -yl)phenylamino)-7-chloropyrido[4,3-i/]pyrimidin-
4(3H)-one
A solution of the product of EXAMPLE IE (300 mg, 1.4 mmol) EXAMPLE 1G (473 mg, 1.54 mmol) and triethylamine (421 mg, 4.17 mmol) in 1 ,4-dioxane (30 mL) was stirred at 105°C under nitrogen for 12 hours. The solvent was removed under vacuum and the residue was washed with sodium bicarbonate solution and ethanol. The crude product was recrystallized from 1 ,4-dioxane to give the title compound. Ή NMR
Figure imgf000069_0001
δ ppm 1 1.36 (brs, 1 H). 8.34 (d, .7 = 8.9 Hz, 1 H), 8.25 (s, 1 H), 6.79 (s, 1 H), 6.72 (d, .7 = 2.1 Hz, 1 H), 6.57 (dd, J = 2.1 , 8.9 Hz, 1 H), 3.89 (s, 3H), 3.51 -3.44 (m, 4H), 3. 14-3.08 (m, 4H). 1.43 (s, 9H).
EXAMPLE I I
tert-butyl 4-(4-(7-(2,6-dichlorobenzyl)-3,4-dihydro-4-oxopyrido[4,3-(sf| pyrimidin-5- y lamino)-3-methoxypheny l)piperazine- 1 -carboxylate 2,6-Dichlorobenzyl zinc bromide solution in tetrahydrofuran (1 N, 2.3 mL, 2.3 mmol) was added to a solution of bis(triphenylphosphine)palladium(II) chloride (26.7 mg) and EXAMPLE 1 H (142 mg, 0.29 mmol) in anhydrous tetrah drofuran (5 mL) and the mixture was stirred under nitrogen at 65°C for 20 hours. After cooling to ambient temperature, the mixture was diluted with water and extracted with ethyl acetate. The combined organic layers were dried over anhydrous sodium sulfate, filtered, and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (200-300 mesh) using 50/1 dichloromethane/methanol to afford the crude product, which was further purified by recrystallization from methanol to give the title compound. MS : 61 1 (Μ+Η ).
EXAMPLE 1 J
/eri-butyl 4-(4-(7-(2,6-dichlorobenzyl)-l ,2,3,4-tetrahydro-4-oxopyrido[4,3-cj]pyrimidin-5- y lamino)-3-methoxypheny l)piperazine- 1 -carboxy late A solution of sodium cyanoborohydride (130 mg, 2.1 mmol), acetic acid (0.5 mL) and EXAMPLE I I (130 mg, 0.21 mmol) in 1/1 tetrahydrofuran/methanol (30 mL) was stirred under nitrogen at 60°C for 4 hours. After cooling to ambient temperature, the solvents were removed under vacuum. The residue was dissolved in water (5 mL) and I N aqueous hydrochloric acid was added. After stirring for 30 minutes, sodium carbonate solution was added until the mixture reached pH = 9.0. The mixture was extracted with ethyl acetate and the solvent was removed under vacuum. The residue was purified by flash chromatography on silica gel (200-300 mesh) 50/1 dichloromethane/methanol to give the title compound. MS: 613 (M+rT).
EXAMPLE I K
7-(2.6-dichlorobenzyl)-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}-2,3- dihydropyrido|4.3-d]pyrimidin-4( 1 H)-one
Hydrochloric acid (4 mL) was added to EXAMPLE 1 J ( 120 mg, 0.2 mmol) in 1.4- dioxane ( 15 mL) and methanol (5 mL) and the mixture stirred at ambient temperature for 4 hours. The solvents were removed in vacuo and the residue was dissolved in water, and brought to pH = 1 1 with sodium hydroxide. The mixture was extracted with ethyl acetate and the organic layers were dried with sodium sulfate, filtered and concentrated in vacuo to give the crude product, which was recrystallized from methanol to afford the title compound. Ή NMR (CD3OD) δ ppm 8.1 1 (d, J = 8.9 Hz, 1 H), 7.45 (s, 1 H), 7.43 (s, 1 H), 7.33-7.25 (m, 1 H), 6.60 (d, J = 2.5 Hz, 1 H), 6.32 (dd. J = 2.5, 8.9 Hz, 1 H), 5.80 (s, 1H), 4.57 (s, 2H), 4.27 (s, 2H). 3.88 (s, 3H), 3.09-3.02 (m, 4H). 3.02-2.95 (m, 4H). MS: 513 (M+ l).
EXAMPLE 2
7-(2,6-dichlorobenzyl)-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
EXAMPLE 2A
2,6-dibromonicotinic acid and 2,6-dibromoisonicotinic acid To a solution of diisopropylamine (7.5 g, 74.3 mmol) in tetrahydrofuran (50 mL) at - 78°C was added «-butyllithium (27.8 mL. 2.5 M solution in hexane, 69.6 mmol). The mixture was stirred at -78 °C for 30 minutes and a solution of 2. 6-dibromopyridine (16.0 g, 67.6 mmol) in tetrahydrofuran (50 mL) was added over a period of 40 minutes. The mixture was stirred at -78 °C for 3 hours. Dry carbon dioxide was bubbled into the reaction mixture and the mixture was stirred at ambient temperature overnight. The solvent was removed under reduced pressure and the residue was dissolved in a mixture of ethyl acetate (50 mL) and 10% aqueous sodium hydroxide (100 mL). The aqueous phase was made acidic with concentrated hydrochloric acid and extracted with ethyl acetate (3 x 150 mL). The organic layers were dried over sodium sulfate, filtered and concentrated to afford the title compound, which was used in the next step without further purification. MS: 282 (M+ l).
EXAMPLE 2B
4,6-dibromo- l -hydroxyfuro[3,4-c]pyridin-3(l H)-one and 4.6-dibromo-3-hydroxyfuro[3,4- c]pyridin-l (3H)-one
To a solution of 2,2,6,6-tetramethylpiperidine (9.1 g, 64.2 mmol) in dry
tetrahydrofuran (1 14 mL) at 0°C, was added n-butyllithium (25.7 mL, 2.5 M solution in hexane, 64.2 mmol) over 15 minutes. The mixture was cooled to -78 °C, and a solution of EXAMPLE 2A (6.0 g, 21.4 mmol) in tetrahydrofuran (28 mL) was added. After stirring at - 78 °C for 1.5 hours, NN-dimethy lformamide (1 1 .4 mL) was added and the mixture stirred at ambient temperature for 15 hours. The mixture was poured into water, acidified with 1 M aqueous hydrochloric acid, and the aqueous phase was extracted with ethyl acetate (3 x 100 mL). The combined organic phase was dried over sodium sulfate, filtered, and concentrated to give the title mixture, which was used in the next step without further purification.
EXAMPLE 2C
5,7-dibromopyrido[3,4-i/]pyridazm-4-ol
To a solution of EXAMPLE 2B (6.6 g, 21.4 mmol) and hydrazine hydrochloride (2.2 g, 21.4 mmol) in isopropanol (50 mL) was added triethylamine (6.5 g, 64.1 mmol) and the mixture heated at 90 WC for 1.5 hours. The solution was concentrated and absorbed on silica gel. Flash chromatography on silica gel (200-300 mesh) eluting with 75/25 to 55/45 petroleum ether/ethyl acetate afforded the title compound. Ή NMR (DMSO-i¾) δ ppm 13.09 (s, 1H), 8.32 (s, 1 H), 8.21 (s, 1H). MS: 306 (M+l).
EXAMPLE 2D
ierf-butyl 4-(4-(7-bromo-4-hydroxypyrido[3,4-c/]pyridazin-5-ylamino)-3- methoxyphenyl)piperazine-l -carbox late
A solution of the product of EXAMPLE 2C (180 mg, 0.6 mmol), tert-bu y\ 4-(4- amino-3-methoxyphenyl)piperazine- l -carboxylate (181 mg, 0.6 mmol), and N,N- diisopropylethylamine (76 mg, 0.6 mmol) in 1 ,4-dioxane (3 mL) was heated to 130°C in a sealed tube for 30 hours. The mixture w as concentrated in vacuo to give the crude product, which was used in the next step without further purification.
EXAMPLE 2E
ίίτί-butyl 4-(4-(7-(2,6-dichlorobenzyl)-4-hydroxypyrido[3,4-d]pyridazin -5- lamino)-3- methoxy pheny l)piperazine- 1 -carboxy late
EXAMPLE 2D (crude, 0.3 mmol), copper(I) iodide (13 mg, 0.07 mmol), and 1 , 1 '- bis(diphenylphosphino)ferrocene-palladium(II) dichloride (24 mg, 0.03 mmol) in tetrahydrofuran (2 mL) were stirred for 2 minutes under nitrogen. 2,6-Dichlorobenzyl zinc bromide (4.8 mL. 0.5 M solution in NN-dimethylforrnarnide, 2.4 mmol) was added and the mixture stirred at 70°C overnight. The mixture was diluted with brine ( 100 mL) and was extracted with ethyl acetate (3 x 100 mL). The organic layers were dried over sodium sulfate, filtered, and concentrated and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 1 : 1 petroleum ether/ethyl acetate to give the title compound. MS: 611 (M+ l).
EXAMPLE 2F
7-(2,6-dichlorobenzyl)-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
EXAMPLE 2E (103 mg, 0. 1 mmol) was dissolved in a mixture of methanol (7 mL) and concentrated hydrochloric acid (3 mL). The mixture was concentrated under reduced pressure and was neutralized with saturated aqueous sodium bicarbonate solution. The aqueous phase was extracted with ethyl acetate (3 x 1 0 mL) and the combined organic layers were dried over sodium sulfate, filtered, and concentrated. The residue was purified by preparative HPLC (acetonitrile/water containing 0.1% trifluoroacetic acid) to give the title compound as a mono-trifluoroacetate salt. Ή NMR (DMSO-c β) δ ppm 12.87 (s, 1H, exchangeable with D2O), 1 1.47 (s, 1 H, exchangeable with D20), 8.75 (brs, 2H, exchangeable with D20). 8.23 (s, 1 H), 8.01 (d, J = 8.7 Hz, 1 H), 7.59-7.56 (m, 2H), 7.42 (t, J = 8.7 Hz, 1 H), 6.85 (s, 1 H), 6.68 (s, 1 H), 6.23 (d, J = 8.7 Hz, 1 H), 4.47 (s, 2H), 3.87 (s, 3H), 3.30 (brs, 8H). MS: 51 1 (M+ l).
EXAMPLE 3
8-(2,6-dichlorobenzyl)-6-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}- l ,2,3,4-tetrahydro-
5H-pyrido[2,3-e] [ 1 ,4]diazepin-5-one
EXAMPLE 3A
2,6-dichloropyridine 1 -oxide A solution of 2,6-dichloropyridine (4.0 g, 27.0 mmol), 30% hydrogen peroxide (5.2 g, 46.0 mmol) and trifluoroacetic acid (40.0 g) was stirred at 100°C for 6 hours. The mixture was diluted with water (50 mL) and extracted with ethyl acetate (3 x 50 mL). The organic layers were separated, washed with aqueous sodium bicarbonate and water, and concentrated under vacuum to give the title compound, which was used in the next step without further purification.
EXAMPLE 3B
2,4,6-trichloropyridine
A solution of the crude product of EXAMPLE 3A (3.8 g) in phosphorus oxychloride was stirred at 100°C for 6 hours. The mixture was concentrated, quenched with crushed ice and adjusted to pH 8-9 with sodium carbonate. The residue was extracted with ethyl acetate (3 x 50 mL) and the organic layers were combined and concentrated under vacuum. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 80/1 petroleum ether/ethyl acetate to give the title compound. Ή NMR (CDCI3) δ ppm 7.3 l (s, 2 H).
EXAMPLE 3C
2,4,6-trichloronicotinic acid
A mixture of diisopropylamine (2.54 g, 22.1 mmol), rc-butyl lithium (1.6 M in hexane, 15.7 mL, 25.1 mmol) and tetrahydrofuran (100 mL) was stirred for 30 minutes at -78°C. A solution of EXAMPLE 3B (2.0 g, 1 1.0 mmol) in tetrahydrofuran (8 mL) was added dropwise over a period of 30 minutes, followed by stirring for 1 hour. The mixture was poured into dry ice and stirred for 1 hour at room temperature. The mixture was acidified with 10% aqueous hydrochloric acid (20 mL), diluted with aqueous saturated sodium chloride and extracted with ethyl acetate. The organic layer was washed, dried over anhydrous sodium sulfate, filtered, and concentrated under vacuum. The solvent was removed under vacuum to give the crude title compound which was used in the next step without further purification.
EXAMPLE 3D
/erf-butyl 2-(2,4,6-trichloronicotinamido)ethylcarbamate A solution of the product of EXAMPLE 3C (6.0 g, 26.5 mmol) in dichloromethane (150 mL) was treated at 0°C with 2 drops of N-dimethy lformamide. Oxalyl chloride (6.73 g, 53 mmol) was added dropwise over 30 minutes and stirring was continued for 2 hours. The solution was concentrated and dried under vacuum to give the crude acid chloride. A solution of the acid chloride (4.5 g, 18.4 mmol) in 60 mL of dry dichloromethane was added dropwise over 1 hour to a solution of tert-butyl 2-aminoethylcarbamate (5.9 g, 36.8 mmol) and triethylamine (3.7 g, 36.8 mmol) in 40 mL of dry dichloromethane at 0°C and stirring was continued for 2 hours. The mixture was concentrated under vacuum and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 100/1 dichloromethane/methanol to give the title compound. MS: 390 (M+Na+).
EXAMPLE 3E
N-(2-aminoethyl)-2,4,6-trichloronicotinamide To a solution of EXAMPLE 3D (1. 13 g, 3.07 mmol) in 100 mL of dichloromethane was added 20 mL of trifluoroacetic acid and the mixture stirred at room temperature over night. The solvent was removed under vacuum to give the crude product which was used in the next step without further purification. MS: 268 (M+H+).
EXAMPLE 3F
6,8-dichloro-l ,2,3,4-tetrahydropyrido[2,3-e][ l ,4]diazepin-5-one A suspension of EXAMPLE 3E (823 mg, 3.07 mmol), cesium fluoride (2.3 g, 15.35 mmol) and triethylamine(l .0 mL) in 300 mL of N, N-dimethylformamide was heated at 75°C under nitrogen for 12 hours. The mixture was concentrated under vacuum and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 30/1 dichloromethane/methanol to give the title compound. Ή NMR (DMSO-de) δ ppm 8.40 (t, 1 H), 7.33 (t, 1 H), 6.85 (s, 1 H), 3.39-3.37 (m, 2 H), 2.90 (s, 1 H), 2.74 (s, 1 H). MS: 232 (M+H+).
EXAMPLE 3G
tert-butyl 4-(4-(8-chloro-5-oxo-2,3,4,5-tetrahydro-lH-pyrido[2,3-e][ l ,4] diazepin-6- ylamino)-3-methoxyphenyl)piperazine-l -carboxylate A solution of N,/V-diisopropylethylamine (0.5 mL), EXAMPLE 3F (200 mg, 0.86 mmol), tert-butyl 4-(4-amino-3-methoxyphenyl)piperazine- l -carboxylate (318 mg, 1 .03 mmol) in 1 ,4-dioxane (4 mL) was heated in a 15 mL sealed tube at 120 °C for 2 days. The mixture was concentrated under vacuum and the residue purified by flash chromatography on silica gel (200-300 mesh) eluting with 30/1 dichloromethane/methanol to give the title compound. MS: 503 (M+H+).
EXAMPLE 3H
8-(2,6-dichlorobenzyl)-6-{ [2-methoxy-4-(piperazin-l-yl)phenyl]amino}- 1,2,3 ,4-tetrahydro-
5H-pyrido[2,3-e] [l ,4]diazepin-5-one
A suspension of EXAMPLE 3G (100 mg, 0.2 mmol), 4 mL (2,6- dichlorobenzyl)zinc(II) bromide (0.5 M in tetrahydrofuran, 2.0 mmol) and
tetrakis(triphenylphosphine)palladium (23 mg, 0.02 mmol) in dry tetrahydrofuran (6 mL) was heated in a microwave for 1 hour at 12()°C. The solution was concentrated under vacuum and the residue purified by preparative HPLC to give the title compound. Ή-NMR (CD3OD) δ ppm 7.42 (m, 1 H), 7.39 (s, 1H), 7.31 -7.26 (m, 1 H), 6.92 (d, J =8.7 Hz, 1 H), 6.59 (d, .7 =2.4 Hz, 1 H), 6.50 (dd, J = 8.7 Hz, J = 2.4 Hz, 1 H), 5.36 (s, 1 H), 4.24 (s, 1 H), 3.71 (s, 3 H), 3.67-3.69 (m, 2 H), 3.54-3.56 (m, 2 H), 3.41 (m, 8 H). MS: 264 (M/2+H+).
EXAMPLE 4
8-(2,6-dichlorobenzyl)-6-{ [4-(piperazin- l -yl)phenyl]amino }-l ,2,3,4-tetrahydro-5H- py rido [2,3 -e] [ 1 ,4]diazepin-5-one
EXAMPLE 4A
2,6-dichloropyridine 1 -oxide
A solution of 2,6-dichloropyridine (4.0 g, 27.0 mmol), 30% hydrogen peroxide (5.2 g, 46.0 mmol) and trifluoroacetic acid (40.0 g) was stirred at 10()°C for 6 hours. The mixture was diluted with water (50 mL) and extracted with ethyl acetate (3 x 50 mL). The combined organic layers were washed with aqueous sodium bicarbonate and water and concentrated under vacuum to give the title compound, which was used in the next step without further purification.
EXAMPLE 4B
2,4,6-trichloropyridine
A solution of EXAMPLE 4A (3.8 g, crude) in phosphorus oxy chloride was stirred at 100°C for 6 hours. The mixture was concentrated, quenched with crushed ice and adjusted to pH 8~9 with sodium carbonate. The residue was extracted with ethyl acetate (3 x 50 mL) and the combined organic layers concentrated under vacuum. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 80/1 petroleum ether/ethylacetate to give the title compound. Ή NMR (CDC13>) δ ppm 7.3 l(s, 2H).
EXAMPLE 4C
2,4.6-trichloronicotinic acid
A solution of diisopropylamine (2.54 g, 22.1 mmol) and «-but ! lithium ( 1.6 M in hexane, 15.7 mL, 25.1 mmol) in tetrahydrofuran (100 mL) was stirred for 30 minutes at - 78°C. A solution of the product of EXAMPLE 4B (2.0 g, 1 1 .0 mmol) in tetrahydrofuran (8 mL) was added dropwise over 30 minutes, followed by stirring for 1 hour. The mixture was poured into dry ice and stirred for 1 hour at room temperature. The mixture was acidified with 10% aqueous hydrochloric acid (20 mL), diluted with an aqueous saturated sodium chloride solution and extracted with ethyl acetate. The organic layer was washed, dried over anhydrous sodium sulfate, filtered, and concentrated under vacuum. The solvent was removed under vacuum to give the crude title compound which was used in the next step without further purification.
EXAMPLE 4D
tert-butyl 2-(2.4,6-trichloronicotinamido)ethylcarbamate A solution of EXAMPLE 4C (6.0 g, 26.5 mmol) in dichloromethane ( 150 mL) was treated at 0°C with 2 drops of NN-dimethylformamide. Oxalyl chloride (6.73 g, 53 mmol) was added dropwise over 30 minutes and stirring was continued for 2 hours. The solution was concentrated and dried under vacuum to give the crude acid chloride. A solution of the acid chloride (4.5 g, 18.4 mmol) in 60 mL dry dichloromethane was added dropwise to a solution of tert-buty\ 2-aminoethylcarbamate (5.9 g, 36.8 mmol) and triethylamine (3.7 g, 36.8 mmol) in 40 mL of dry dichloromethane at 0°C over 1 hour and stirring was continued for 2 hours. The mixture was concentrated under vacuum and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting w ith 100/1
dichloromethane/methanol to give the title compound. MS: 390 (M+Na+).
EXAMPLE 4E
N-(2-aminoethyl)-2,4,6-trichloronicotinamide A solution of the product of EXAMPLE 4D (1.13 g, 3.07 mmol) in 100 mL of dichloromethane was treated w ith 20 mL of trifluoroacetic acid and the mixture was stirred at room temperature over night. The solvent was removed under vacuum to give the crude product which was used in the next step without further purification. MS : 268 (Μ+ΗΓ).
EXAMPLE 4F
6,8-dichloro- 1 ,2,3 ,4-tetrahy dropy rido[2,3 -e ] [ 1 ,4]diazepin-5 -one A suspension of EXAMPLE 4E (823 mg, 3.07 mmol), cesium fluoride (2.3 g, 15.35 mmol) and 1 mL of triethylamine in 300 mL NN-dimethylformamide was heated to 75°C under nitrogen overnight. The mixture was concentrated under vacuum and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 30/1 dichloromethane/methanol to give the title compound. Ή-NMR (DMSO-c/^): δ ppm 8.40 (t, 1 H), 7.33 (t, 1 H), 6.85 (s. l H), 3.39-3.37 (m, 2H), 2.90 (s. 1 H), 2.74 (s, 1 H). MS: 232 (M+H+).
EXAMPLE 4G
teri-butyl 4-(4-(8-chloro-5-oxo-2,3,4,5-tetrahydro- lH-pyrido[2,3-e][ l,4]diazepin-6-yl amino)pheny l)piperazine - 1 -carboxy late
A solution of EXAMPLE 4F (200 mg, 0.86 mmol) , /en-butyl 4-(4- aminophenyl)piperazine-l -carboxylate (285 mg, 1.03 mmol) and diisopropylethylamine (0.5 mL) in 1 ,4-dioxane (4 mL) was heated in a sealed tube at 120°C for 2 days. The mixture was concentrated under vacuum and the residue purified by flash chromatography on silica gel (200-300 mesh) eluting with 30/1 dichloromethane/methanol to give the title compound. MS: 473 (M+tT).
EXAMPLE 4H
8-(2,6-dichlorobenzyl)-6-{ [4-( iperazin-l-yl)phenyl]amino}-l ,2,3,4-tetrahydro-5H- pyrido[2,3-e] [ 1 ,4]diazepin-5-one
A suspension of the product of EXAMPLE 4G (1 10 mg, 0.23 mmol), (2,6- dichlorobenzyl)zinc(II) bromide (4.6 mL, 2.3 mmol, 0.5 M in tetrahydrofuran) and tetrakis(triphenylphosphine)palladium (27 mg, 0.023 mmol) in 5 mL dry tetrahydrofuran was heated to 120°C by microwave for 1 hour. The crude product was purified by preparative HPLC (acetonitrile/water containing 0. 1% trifluoroacetic acid) to give the title compound. Ή-NMR (DMSO-c¼): δ ppm 11.60 (br, 1 H), 8.76 (br, 2H), 8.65 (br. 1 H), 7.55-7.47 (m, 2H), 7.37-7.31 (m, 1H), 6.92 (s, 4H), 5.44 (s, 1H). 4.16 (s, 1 H), 3.41 -3.60 (m, 4H), 3.31 -3.23 (m. 8H). MS: 249 (M/2+H+).
EXAMPLE 5
7-(2,6-dichlorobenzyl)-5-{ [4-(piperazin-l -yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol
EXAMPLE 5 A
tert-butyl 4-(4-(7-bromo-4-hydroxypyrido[3,4-c/]pyridazin-5-ylamino)phenyl)piperazine- l - carboxylate
The title compound was obtained following the procedure of EXAMPLE 2D substituting tert-butyl 4-(4-aminophenyl)piperazine-l -carboxylate for tert-butyl 4-(4-amino- 3-methoxyphenyl)piperazine-l -carboxylate. Purification by flash chromatography on silica gel (200-300 mesh) eluting with 50/1 dichloromethane/methanol gave the title compound. MS: 501 (M+rf).
EXAMPLE 5B
feri-butyl 4-(4-(7-(2,6-dichlorobenzyl)-4-hydroxypyrido[3,4-i/]pyridazin-5- ylamino)phenyl)piperazine-l -carboxylate
The title compound was obtained following the procedure of EXAMPLE 2E substituting EXAMPLE 5A for EXAMPLE 2D. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 3/1 petroleum ether/ethyl acetate to give the title compound. MS: 581 (M+H+).
EXAMPLE 5C
7-(2,6-dichlorobenzyl)-5-{ [4-(piperazin-l -yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol The title compound was obtained following the procedure of EXAMPLE 2F substituting EXAMPLE 5B for EXAMPLE 2E. Purification by preparative HPLC
(acetonitrile/water containing 0.1% trifluoroacetic acid) gave the title compound as the mono trifluoroacetic acid salt. Ή NMR (DMSO-<¾): δ ppm 12.99 (s, 1 H), 1 1.26 (s, 1H), 8.70 (s, 2H). 8.26 (s, 1 H), 7.59 (s, 1 H), 7.57 (s, 1 H)? 7.47-7.38 (m, 3H), 6.90-6.77 (m, 3 H), 4.47 (s. 2H 3.27 (s, 8H). MS: 481 (M+lT).
EXAMPLE 6
8-(2,6-dichlorobenzyl)-6-{ [4-(piperazin- l -yl)phenyl]amino}- 1.2.3.4-tetrahydro-5H- pyrido[4,3-e][l ,4]diazepin-5-one
EXAMPLE 6A
r/-butyl 2-(2,4,6-trichloronicotinamido)ethylcarbamate A solution of 2,4,6-trichloronicotinic acid (6.0 g, 26.5 mmol) in dichloromethane (150 mL) at 0°C was treated with 2 drops of N,N-dimethyl formamide. Oxalyl chloride (6.73 g, 53 mmol) was added dropwise within 30 minutes and stirring was continued for 2 hours. The solution was concentrated and dried under vacuum to give crude 2,4,6-trichloronicotinoyl chloride. A solution of the crude acid chloride (4.5 g, 18.4 mmol) in dichloromethane (60 mL) was added dropwise to a solution of ferf-butyl 2-aminoethyl carbamate (5.9 g, 36.8 mmol) and triethylamine (3.7 g, 36.8 mmol) in dichloromethane (40 mL) at 0°C over 1 hour and stirring was continued for 2 hours. The mixture was concentrated and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 100/1 dichloromethane/methanol to give the title compound. MS: 390 (M + Na+).
EXAMPLE 6B
/V-(2-aminoethyl)-2.4,6-trichloronicotinamide A solution of EXAMPLE 6A (1.13 g, 3.07 mmol) in dichloromethane (100 mL) was treated with trifluoroacetic acid (20 mL) and the mixture was stirred at room temperature overnight. Concentration provided the crude title compound which was used in the next step without further purification. MS: 268 (M + Yf).
EXAMPLE 6C
6,8-dichloro-l ,2,3,4-tetrahydropyrido[4,3-e][ l,4]diazepin-5-one A suspension of EXAMPLE 6B (823 mg, 3.07 mmol), cesium fluoride (2.3 g, 15.35 mmol) and triethylamine (1 mL) in /V,/V-dimethylformamide (300 mL) was heated at 75°C under nitrogen overnight. The mixture was concentrated and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 30/1
dichloromethane/methanol to give the title compound. Ή NMR (DMSO-c^, 300 MHz): δ 8.33 (t, 1 H), 7.46 (t, 1 H), 6.67 (s. 1 H), 3.29 - 3.38 (m, 4 H). MS: 232 (M + H+).
EXAMPLE 6D
tert-butyl 4-(4-(8-chloro-5-oxo-2,3,4,5-tetrahydro-lH-pyrido[4,3-e][ l ,4]diazepin-6- y lamino)pheny l)piperazine- 1 -carboxy late
A solution of EXAMPLE 6C (170 mg, 0.73 mmol), te/1-buty 1 4-(4- aminophenyl)piperazine-l -carboxy late (244 mg, 0.88 mmol) and NN-diisopropylethylamine (0.5 mL) in 1 ,4-dioxane (4 mL) was heated in a sealed tube at 125°C for 3 days. The mixture was concentrated and the residue was purified by flash chromatography on silica gel (200- 300 mesh) eluting with 20/1 dichloromethane/methanol to give the title compound. MS: 473 (M + If).
EXAMPLE 6E
8-(2,6-dichlorobenzyl)-6-(4-(piperazin-l -yl)phenylamino)- l,2,3,4-tetrahydropyrido[4,3- e] [ 1 ,4]diazepin-5-one
A suspension of EXAMPLE 6D (260 mg, 0.34 mmol), 0.5M (2,6-dichloro benzyl)zinc(II) bromide in tetrahydrofuran (6.8 mL, 3.4 mmol,) and
tetrakis(triphenylphosphine)palladium (79 mg, 0.07 mmol) in tetrahydrofuran (10 mL) was heated at 120°C in a Biotage Microwave Synthesizer for 1 hour. The crude title compound was purified by preparative HPLC eluting with a gradient of 12 to 90% acetonitrile/water (containing 0.1% trifluoroacetic acid) to give the title compound. Ή NMR (CD3OD, 300 MHz): δ ppm 7.50 (d, 1 H), 7.48 (s, 1 H), 7.37 (m, 1 H), 7.27 - 7.30 (m, 2 H), 7.16 - 7.19 (m, 2 H), 5.66 (s, 1 H), 4.21 (s, 2 H), 3.39 - 3.54 (m, 12 H). MS: 249 (M/2 + H+).
EXAMPLE 7
7-(2,6-dichlorobenzyl)-5-{ [3-methyl-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 7A
iert-butyl 4-(2-methyl-4-nitrophenyl)piperazine- l -carboxy late A mixture of l -bromo-2-methyl-4-nitrobenzene (5.16 g, 24 mmol), /erf-butyl piperazine-1 -carboxy late (4.46 g, 24 mmol), 2-dicyclohexylphosphino-2',4',6'- triisopropylbiphenyl (1.15 g, 2.4 mmol), cesium carbonate (15.65 g, 48 mmol) and tris(dibenzylideneacetone)dipalladium (2.21 g, 2.4 mmol) in 1 ,4-dioxane (120 mL) was heated at 100°C for 16 hours. The mixture was filtered and the filtrate was concentrated to give the crude product which was purified by flash chromatography on silica gel (200-300 mesh) eluting with 20/1 petroleum ether/ethyl acetate to give the title compound. MS: 322 (M+H ). EXAMPLE 7B
tert-butyl 4-(4-amino-2-methylphenyl)piperazine-l -carbox late A suspension of EXAMPLE 7A (3.10 g, 9.7 mmol) and 1 % palladium on carbon (310 mg) in methanol (200 mL) was stirred under hydrogen at ambient temperature for 5 hours. The catalyst was filtered off and the filtrate was concentrated. Purification by flash chromatography on silica gel (200-300 mesh) eluting with 8/1 petroleum ether/ethyl acetate gave the title compound. MS: 292 (M+H+).
EXAMPLE 7C
2,6-dichloroisonicotinic acid
A mixture of 2,6-dihydroxyisonicotinic acid ( 10 g. 64.5 mmol) and phosphoryl trichloride (30 mL) was heated in a sealed tube at 140"C for 6 hours. After cooling to room temperature, the mixture was concentrated and the residue was poured into ice-water and vigorously stirred for 15 minutes. The suspension was filtered and the solid was washed with cooled water and dried in vacuo to afford the title compound. MS: 192 (M + H+).
EXAMPLE 7D
ethyl 2,6-dichloroisonicotinate
To a solution of EXAMPLE 7C (5 g, 26.2 mmol) in ethanol (50 mL) was added dropwise thionyl chloride (5.6 mL, 78.6 mmol) in an ice-water bath and the mixture was stirred at room temperature for 5 hours. After concentration, the residue was purified by flash chromatography eluting with a gradient of 1 /20 to 1/10 ethyl acetate/petroleum ether to provide the title compound. MS: 220 (M + H+).
EXAMPLE 7E
(2,6-dichloropyridin-4-yl)methanol
To a solution of EXAMPLE 7D (3.1 g, 14.2 mmol) in ethanol (100 mL) at 0°C was added sodium triacetoxyborohydride (2.7 g, 71.1 mmol) in portions and the mixture was heated at 80°C for 3 hours. The mixture was concentrated and the residue was diluted with water (20 mL). I N Hydrochloric acid was added to quench excess sodium
triacetoxyborohydride and then the mixture was neutralized with saturated aqueous sodium carbonate. The mixture was extracted with dichloromethane (3 x 20 mL) and the combined organic phase was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated. The residue was recrystallized from methanol to give the title compound. MS: 178 (M + H+).
EXAMPLE 7F
2 ,6-dichloroisonicotinaldehy de To a solution of EXAMPLE 7E (3.2 g, 18. 1 mmol) in dichloromethane ( 100 mL) was added Dess-Martin periodinane (9.2 g, 21.7 mmol) in portions and the mixture was stirred at room temperature for 30 minutes. The mixture was filtered and the filtrate was concentrated. The residue was purified by flash chromatography eluting with 1/20 ethyl acetate/ petroleum ether to afford the title compound. MS: 176 (M + HT).
EXAMPLE 7G
2,6-dichloro-4-(dimethoxymethyl)pyridine
To a solution of EXAMPLE 7F (2 g, 1 1.4 mmol) in methanol (10 mL) and toluene (10 mL) was added methyl orthoformate (2.4 g, 22.9 mmol) and p-toluenesulfonic acid (98 mg, 0.57 mmol) and the mixture was heated at reflux for 2 hours. After concentration, the residue was diluted with dichloromethane and was washed with saturated aqueous sodium carbonate and brine. The organic phase was dried over anhydrous sodium sulfate, filtered and concentrated to give the title compound.
EXAMPLE 7H
methyl 2,6-dichloro-4-(dimethoxymethyl)nicotinate
To a solution of diisopropylamine (9.5 mL, 67.9 mmol) in tetrahydrofuran (50 mL) at -78°C was added 2.5M n-butyl lithium in hexane (27 mL, 67.9 mmol) and the mixture was stirred at -78°C for 30 minutes. A solution of EXAMPLE 7G (5 g, 22.6 mmol) in tetrahydrofuran (20 mL) was added dropwise and the mixture was stirred at -78°C for 3 hours. A solution of methyl carbonochloridate (6 mL, 67.9 mmol) in tetrahydrofuran (20 mL) was added and the mixture was warmed to room temperature over 2 hours. The mixture was carefully quenched by addition of water and the mixture was extracted with
dichloromethane (3x 100 mL). The combined organic phase was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography eluting with 1/20 ethyl acetate/petroleum ether to afford the title compound. MS: 280 (M + H+).
EXAMPLE 71
methyl 2,6-dichloro-4-formylnicotinate
To a solution of EXAMPLE 7H (0.5 g, 1 .8 mmol) in dichloromethane (5 mL) was added trifluoroacetic acid (2 mL) and the mixture was stirred at room temperature overnight. The mixture was concentrated to give the title compound which was used in the next step without further purification. MS: 234 (M + rT).
EXAMPLE 7J
(E)-methy 1 4-((2-(tert-butoxy carbony l)hy drazono)methy l)-2, 6-dichloronicotinate To a solution of EXAMPLE 71 (2.3 g, 9.9 mmol) in 1 ,4-dioxane (30 mL) was added tert-butyl hydrazine carboxylate (1.33 g, 10.1 mmol) and the mixture was stirred at room temperature overnight. The mixture was concentrated to provide the title compound which was used in the next step without further purification. MS: 348 (M + LT).
EXAMPLE 7K
5,7-dichloropyrido[3,4-dJpyridazin-4(3H)-one To a solution of EXAMPLE 7J (2.9 g, 8.4 mmol) in dichloromethane (50 mL) was added trifluoroacetic acid (10 mL) and the mixture was stirred at room temperature for 2 hours. The mixture was concentrated and the residue was washed with 1/10 ethyl acetate/ petroleum ether to provide the title compound. MS: 216 (M + flT).
EXAMPLE 7L
tert-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-c/]pyridazin-5-ylamino)-2- methy lphenyl)piperazine- 1 -carboxylate
A solution of EXAMPLE 7K ( 100 mg, 0.465 mmol), EXAMPLE 7B. (135 mg. 0.465 mmol), and /VN-diisopropylethylamine (2 mL) in dioxane (30 mL) was stirred at 120°C for 16 hours. The mixture was cooled to ambient temperature and concentrated. The residue was diluted with water (50 mL) and extracted with ethyl acetate (3 x 100 mL). The combined organic extracts were dried over anhydrous sodium sulfate, filtered and purified by flash chromatography on silica gel (200-300 mesh) eluting with a gradient of 50/1 to 10/1 dichloromethane/methanol to give the title compound. MS: 471 (M + H+).
EXAMPLE 7M
tert-butyl 4-(4-(7-(2,6-dichlorobenzyl)-4-oxo-3,4-dihydropyrido[3,4-i/]pyridazin-5- ylamino)-2-methylphenyl)piperazine- l -carboxylate A mixture of EXAMPLE 7L (150 mg, 0.32 mmol), 1 M (2,6-dichlorobenzyl)zinc(lI) bromide in tetrahydrofuran (15.0 mL, 15.0 mmol), tetrakis(triphenylphosphine)palladium (173 mg, 0.15 mmol) in tetrahydrofuran (10 mL) was heated in a Biotage Microwave Synthesizer at 120 °C for 1 hour. After cooling to ambient temperature, the mixture was filtered and purified by flash chromatography on silica gel (200-300 mesh) eluting with a gradient of 50/1 to 10/1 dichloromethane/methanol to provide the title compound. MS: 595 (M + H+).
EXAMPLE 7
7-(2,6-dichlorobenzyl)-5-{ [3-methyl-4-(piperazin- l -yl)phenyl|amino}pyrido[3,4- d]py ridazin-4(3 H)-one The title compound was obtained following the procedure described in EXAMPLE 20F, using EXAMPLE 7M in place of EXAMPLE 20E. Ή NMR (DMSO-i¾, 300 MHz): δ 13.02 (s, 1 H), 1 1.34 (s. 1 H), 8.65 (brs, 2 H), 8.27 (s, 1 H), 7.57 - 7.36 (m, 5 H), 6.88 - 6.84 (m, 2 H), 4.47 (s, 2 H), 3.25 (brs, 4 H), 2.98 (brs, 4 H), 2.22 (s, 3 H). MS: 495 (M + H+).
EXAMPLE 8
5-{ [4-(4-cyclohexylpiperazin-l -yl)-2-methoxyphenyl]amino}-7-(2,6- dichlorobenzyl)pyrido[3,4-d]pyridazin-4(3H)-one To a solution of EXAMPLE 2F (70 mg, 0. 137 mmol) in methanol ( 10 mL) was added acetic acid (0. 1 mL) and cyclohexanone (16 mg. 0.1 4 mmol). After stirring at 60°C for 2 hours, the mixture was cooled to ambient temperature and sodium cyanoborohydride (173 mg. 2.74 mmol) was added. The mixture was stirred for 16 hours, poured into water (50 mL) and extracted with ethyl acetate (2 χ 50 mL). The combined organic layers were dried over anhydrous sodium sulfate, filtered, concentrated and purified by preparative HPLC eluting with a gradient of 10/90 to 30/20 acetonitrile/water (containing 0.1 % trifluoroacetic acid) to give the title compound. Ή NMR (CD3OD, 300 MHz): δ 8.17 (d, J = 9.0 Hz, 1 H), 8.11 (s, 1 H), 7.49 (d, J = 7.8 Hz, 2 H), 7.34 (t, J = 7.5 Hz, 1 H), 6.79 (s, 1 H), 6.69 (s, 1 H), 6.34 (d, J = 9.0 Hz. 1 H), 4.58 (s. 2 H), 3.96 (s, 3 H), 3.95 - 3.63 (m, 4 H). 3.08 - 3.03 (m, 3 H), 2.25 - 2.21 (m. 2 H). 2.04 - 1.44 (m. 10 H). MS: 593.2 (M + H').
EXAMPLE 9
[4-(4-{ [7-(2,6-dichlorobenzyl)-4-hydroxypyrido[3,4-d]pyridazin-5-yl]amino}-3- methoxypheny l)piperazin- 1 -y l](pheny l)methanone To a solution of EXAMPLE 2F (51.1 mg, 0.100 mmol) in N,N-dimethylformamide (5 mL) was added N,N-diisopropylethylamine (38.7 mg, 0.300 mmol) and the solution was stirred at ambient temperature for 5 minutes. The mixture was cooled to 0°C and a solution of benzoyl chloride (20.9 mg, 0. 150 mmol) in WN-dimethylformamide (1 mL) was added dropwise and the mixture was stirred at ambient temperature for 15 hours. The mixture was diluted with ethyl acetate (50 mL) and washed with brine (50 mL). The organic layer was dried over anhydrous sodium sulfate, concentrated, filtered, and purified by flash chromatography on silica gel (200-300 mesh) eluting with 2/3 petroleum ether/ethyl acetate to give the title compound. Ή NMR (DMSO-<¾, 300 MHz): δ 12.84 (s, 1 H), 1 1.45 (s, 1 H), 8.21 (s, 1 H), 7.96 - 7.93 (m, 1 H), 7.58 - 7.43 (m, 8 H), 6.85 (s, 1 H), 6.66 (s, 1 H), 6.22 - 6.19 (m, 1 H), 4.47 (s, 2 H), 3.86 (s, 3 H), 3.61 (m, 4 H), 3.14 (m, 4 H). MS: 615 (M + H+).
EXAMPLE 10 7-[(2,6-dichlorophenyl)amino]-5-{ [2-methoxy-4-(piperaz^
d]pyridazin-4-ol
EXAMPLE 10A
tert-butyl4-(4-(7-(2,6-dichlorophenylamino)-4-oxo-3,4-dihydropyrido[3,4-d]pyridazin-5- y lamino)-3-methoxy pheny piperazine- 1 -carboxy late
A mixture of EXAMPLE 24A (0.1 g, 0.21 mmol), 2,6-dichlorobenzenamine (33 mg, 0.21 mmol) and potassium tert-butoxide (47 mg, 0.42 mmol) was degassed with nitrogen three times. Tris[dibenzylideneacetone]dipalladium (4 mg) and 2-dicyclohexylphos phino- 2'.4',6'-triisopropylbiphenyl (8 mg) were added and the mixture was stirred at 120°C overnight. The mixture was concentrated and the residue was purified by flash
chromatography on silica gel eluting with 100/1 dichloromethane/methanol to give the title compound.
EXAMPLE 10B
7-[(2,6-dichlorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
EXAMPLE 10A (80 mg, 0.13 mmol) was dissolved in a mixture of methanol (7 mL) and concentrated hydrochloric acid (3 mL). The mixture was concentrated under reduced pressure and was neutralized with saturated aqueous sodium bicarbonate solution. The aqueous phase was extracted with ethyl acetate (3 x 100 mL) and the combined organic layers were dried over sodium sulfate, filtered, and concentrated. The residue was purified by preparative HPLC (acetonitrile/water containing 0. 1 % trifluoroacetic acid) to give the title compound as a mono-trifluoroacetate salt. Ή NMR (DMS0-- 300 MHz): δ 12.24 (s. 1 H). 1 1.41 (s, 1 H), 9.34 (s, 1 H), 8.68 (s, 2 H), 8.01 (s, 1 H), 7.62 (d, J = 8.7 Hz, 3 H), 7.41 (d, J = 7.8 Hz, 1 H), 7.42 (d, J = 7.8 Hz, 1 H), 6.61 (s, 1 H), 6.67 (s, 1 H), 6.12 (dd, J =1.8 Hz, 8.7 Hz, 1 H), 3.82 (s, 3 H), 3.23 (s, 8 H). MS: 514 (M+H+).
EXAMPLE 1 1
7-(2,6-dichlorobenzyl)-5-({2-methoxy-4-[4-(propan-2-ylsulfonyl)piperazin-l - yl]phenyl}amino)pyrido[3,4-d]pyridazin-4-ol To a solution of EXAMPLE 2F (51.1 mg, 0.100 mmol) in NN-dimethylformamide (5 mL) at 0°C was added /V,N-diisopropylethylamine (38.7 mg, 0.300 mmol). After 5 minutes, a solution of propane-2-sulfonyl chloride (21.4 mg, 0.150 mmol) in /VN-dimethylformamide (1 mL) was added dropwise and the mixture was stirred at 0 °C for 15 hours. The mixture was diluted with ethyl acetate (50 mL) and washed with brine (50 mL). The organic layer was dried over anhydrous sodium sulfate, concentrated, filtered, and purified by flash chromatography on silica gel (200~300 mesh) eluting with 2/3 petroleum ether/ethyl acetate to give the title compound. Ή NMR (DMSO-ck, 300 MHz): δ 12.86 (s, 1 H), 11.47 (s, 1 H), 8.23 (s, 1 H), 7.98 (d. J = 8.7 Hz, 1 H), 7.60 (d, J = 7.8 Hz, 2 H), 7.45 (t, J = 8.1 Hz, 1 H), 6.87 (s, 1 H), 6.68 (s, 1 H), 6.24 (d, J = 8.7 Hz, 1 H), 4.49 (s, 2 H), 3.87 (s, 3 H), 3.47 - 3.38 (m. 5 H). 3.16 (m, 4 H), 1 .29 (d, J = 6.9 Hz, 6 H). MS: 617 (M + H+).
EXAMPLE 12
l -[4-(4-{ [7-(2,6-dichlorobenzyl)-4-hydroxypyrido[3,4-d]pyridazin-5-yl]amino}-3- methoxyphenyl)piperazin- l -yl]-2-(dimethylamino)ethanone To a solution of 2-(dimethylamino)acetic acid ( 12 mg, 0.1 1 mmol) in N,N- dimethylformamide (2 mL) was added ethyldiisopropylamine (0.05 mL, 0.2 mmol) and 0-(7- azabenzotriazol-l -yl)-N,N,N',N'-tetramethyluroniumhexafluoro phosphate (46 mg, 0.12 mmol). and the mixture was stirred at room temperature for 15 minutes. The product of EXAMPLE 2F (50 mg, 0. 1 mmol) was added and the mixture was stirred at room temperature overnight. The mixture was diluted with water and extracted with ethyl acetate (3 5 mL). The combined organic phase was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated. The residue was washed with 1/10 ethyl acetate/petroleum ether to afford the title compound. Ή NMR (DMSO^, 300 MHz): δ 12.85 (s, 1 H), 1 1.47 (s, 1H), 8.53 (s, 1 H), 8.23 (s, 1 H), 8.02 (d, J = 9 Hz, 1 H), 7.59 (d, J = 8.4 Hz, 2 H), 7.46-7.41 (m, 1 H), 6.86 (s, 1 H), 6.70 (s, 1 H), 6.24 (d, J = 9 Hz, 1 H), 4.49 (s, 2 H), 4.29 (s, 2 H), 3.93 (s, 3 H), 3.68-3.71 (m, 2 H), 3.53-3.56 (m, 2 H), 3. 17 (d, J = 13.5 Hz, 4 H), 2.75 (s, 6 H). MS: 598 (M+H+).
EXAMPLE 13
5-{ [3-chloro-4-(piperazin-l -yl)phenyl]amino}-7-(2,6-dichlorobenzyl)pyrido[3,4-d]pyridazin-
4(3H)-one
EXAMPLE 13A
/erf-butyl 4-(2-chloro-4-nitropheny l)piperazine- 1 -carboxy late A mixture of 1 -bromo-2-chloro-4-nitrobenzene (1 g, 4.2 mmol), /erf-butyl piperazine- 1 -carboxy late (0.86 g, 4.6 mmol), potassium carbonate (878 mg, 6.4 mmol) and tetrabutyl ammonium bromide ( 137 mg, 0.42 mmol) in dimethylsulfoxide (20 mL) was heated at 125°C for 3 hours. After cooling to ambient temperature, the mixture was diluted with water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate, filtered, and concentrated. The residue was purified by flash chromatography on silica gel eluting with 5/1 petroleum ether/ethyl acetate to give the title compound. MS: 342 (M + H+) EXAMPLE 13B
tert-buty 1 4-(4-amino-2-chlorophenyl)piperazine- 1 -carboxy late To a solution of EXAMPLE 13 A (1.5 g, 4.4 mmol) in 1 : 1 tetrahydrofuran/methanol (80 mL) at ambient temperature was slowly added zinc power (1.43 g, 22 mmol) and acetic acid (5 mL). The mixture was stirred for 1 hour, followed by addition of a saturated aqueous sodium hydrogen carbonate solution. The mixture was stirred for 1 hour and filtered, followed by extraction with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate, filtered, and concentrated. The residue was purified by flash chromatography on silica gel eluting with 5/1 petroleum ether/ethyl acetate to give title compound. MS: 312 (M + H+).
EXAMPLE 13C
/e /-butyl 4-(2-chloro-4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-of]pyridazin-5- ylamino)phenyl)piperazine-l -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 20D, using EXAMPLE 13B in place of EXAMPLE 20C. MS: 491 (M + H+).
EXAMPLE 13D
ierf-butyl 4-(4-(7-(2,6-dichlorobenzyl)-4-oxo-3,4-dihydropyridof3,4-i/]pyridazin-5- ylamino)-2-chlorophenyl)piperazine-l -carboxy late The title compound was obtained following the procedure described in EXAMPLE 20E, using EXAMPLE 13C in place of EXAMPLE 20D. MS: 615 (M + H+).
EXAMPLE 13E
5-{[3-chloro-4-(piperazin-l-yl)phenyl]amino}-7-(2,6-dichlorobenzyl)pyrido[3,4-d]pyridazin-
4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 20F, using EXAMPLE 13D in place of EXAMPLE 20E. Ή NMR (DMS0-< 300 MHz): δ 13.11 (s, 1 H). 1 1.49 (s, 1 H), 8.78 (brs, 2 H), 8.33 (s, 1 H), 7.92 (s, 1 H), 7.59 - 7.38 (m, 4 H), 7.08 - 6.99 (m, 2 H), 4.50 (s, 2 H), 3.28 (brs, 4 H), 3.14 (brs, 4 H). MS: 515 (M + H+).
EXAMPLE 14
7-(2,6-dichlorobenzyl)-5-{[5-^iperazin-l-yl)pyridin-2-yl]amino}pyrido[3,4-d]pyridazin- 4(3H)-one
EXAMPLE 14A
r/-butyl 4-(6-(7-chloro-4-oxo-3,4-dihychopyrido[3,4-(^pyridazin-5-ylamino)pyridin-3- yl)piperazine-l -carboxy late The title compound was obtained following the procedure described in EXAMPLE 20D, using EXAMPLE 103C in place of EXAMPLE 20C. MS: 458 (M + H+).
EXAMPLE 14B
iert-butyl 4-(6-(7-(2>6-dichlorobenzyl)-4-oxo-3,4-dihydropyrido[3,4-(af]pyridazin-5- y lamino)py ridin-3-y l)piperazine- 1 -carboxy late The title compound was obtained following the procedure described in EXAMPLE 20E, using EXAMPLE 14A in place of EXAMPLE 20D. MS: 582 (M + H+).
EXAMPLE 14C
7-(2,6-dichlorobenzy l)-5 - { [5 -(piperazin- 1 -y l)pyridin-2-y ljamino }py rido [3 ,4-d]py ridazin-
4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 20F, using EXAMPLE 14B in place of EXAMPLE 20E. Ή NMR (CD3OD, 300 MHz): δ 8.29 (s, 1 H), 8.00 - 7.82 (m, 3 H), 7.59 - 7.39 (m, 3 H), 7.18 (s, 1 H), 4.77 (s, 2 H), 3.53 - 3.45 (m, 8 H). MS: 515 (M + H+).
EXAMPLE 15
7-(2,6-dichlorobenzyl)-5-( {2-methoxy-4-[4-( l -methylpiperidin-4-yl)piperazin-l - yl]phenyl }amino)pyrido[3.4-d]pyridazin-4(3H)-one To a solution of EXAMPLE 2F (60 mg, 0.12 mmol) in methanol (10 mL) was added acetic acid (0.05 mL) and l-methylpiperidin-4-one (135 mg, 1.2 mmol) and the mixture was stirred at 60°C for 3 hours. After cooling to ambient temperature, sodium cyanoborohydride (151 mg, 2.4 mmol) was added and the mixture was stirred overnight. The mixture was poured into water (50 mL) and extracted with ethyl acetate (3 * 50 mL). The organic layer was dried over anhydrous sodium sulfate, filtered, concentrated and purified by preparative HPLC eluting with a gradient of 10/90 to 30/20 acetonitrile/water (containing 0.1% trifluoroacetic acid) to give the title compound as a solid trifluoroacetate salt. Ή NMR (CD3OD, 300 MHz): δ 8.20 (d, J = 8.4 Hz, 1 H), 8. 13 (s, 1 H), 7.51 (d, J = 7.8 Hz. 2 H), 7.37 (t, ./ = 7.5 Hz, 1 H), 6.82 (s, 1 H). 6.73 (s, 1 H), 6.38 (brs. 1 H), 4.80 (s, 2 H), 3.98 (s. 3 H), 3.80 - 3.76 (m, 2 H), 3.58 (brs, 8 H), 3.35 - 3.20 (m, 3 H), 2.98 (s. 3 H), 2.54 - 2.20 (m, 2 H). 2.15 - 2.13 (m, 2 H). MS: 608.3 (M + H+).
EXAMPLE 16
7-(2,6-dichlorobenzyl)-5-({2-methoxy-4-[4-(3-methylbutyl)piperazin-l- yl]phenyl}amino)pyrido[3,4-d]pyridazin-4(3H)-one To a solution of EXAMPLE 2F (0.1 g, 0.2 mmol) in methanol (3 mL) was added 3- methylbutanal (20 mg, 1.2 mmol), sodium cyanoborohydride (250 mg. 4 mmol) and a drop of acetic acid and the mixture was stirred at room temperature overnight. The mixture was carefully quenched with saturated aqueous ammonium chloride and extracted with ethyl acetate (3 x 10 mL). The combined organic phase was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by preparative HPLC using a gradient of 10/90 to 80/20 acetronitrile in water (containing 0.1 %
trifluoroacetic acid) to give the title compound. Ή NMR(DMSO-of6, 300 MHz): δ 12.90 (s, 1 H), 1 1.50 (s, 1 H), 8.41 (s, 1 H), 8.1 1 (s, 1 H), 8.04 (d, J = 8.7 Hz, 1 H), 7.60 (d, J = 7.8 Hz, 2 H), 7.46-7.41 (m, 1 H), 6.86 (s, 1 H), 6.71 (s, 1 H), 6.25 (d, 7 = 8.4 Hz, 1 H), 4.49 (s, 2 H), 3.90 (s. 3 H), 3.84 (d, J = 13.2 Hz, 2 H), 3.62 (d, J = 1 1.4 Hz, 2 H), 3.19-3.12 (m, 4 H), 2.98- 2.91 (m. 2 H), 1.68-1 .59 (m. 3 H). 0.96 (d, ./ = 6 Hz, 6 H). MS: 583 (M+H+).
EXAMPLE 17
7-(2,6-dichlorobenzyl)-5-({2-methoxy-4-[2-(pyrrolidin-l -yl)ethyl]phenyl}amino)pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 17A
diethyl 2-(3-methoxy-4-nitrophenyl)malonate
To a suspension of sodium hydride (3. 1 g, 88 mmol) in dry N,N-dimethylformamide (40 mL) at 0°C was added diethyl malonate (10.3 g, 64.3 mmol) and the mixture was stirred at room temperature for 30 minutes. 4-Fluoro-2-methoxy- l -nitrobenzene (10 g, 58.5 mmol) was added and the mixture was stirred at 90°C overnight. The mixture was diluted with water and extracted with ethyl acetate (3 x 20 mL). The combined organic phase w as washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel eluting with a gradient of 1/20 to 1/10 ethyl acetate/petroleum ether to afford the title compound.
EXAMPLE 17B
2-(3-methoxy-4-nitrophenyl)acetic acid
To a solution of EXAMPLE 17A (0.3 g, 0.96 mmol) in ethanol (2 mL) was added 2N aqueous sodium hydroxide (2 mL) and the mixture was stirred at room temperature for 12 hours. The mixture was concentrated and the residue was diluted with water and extracted with ethyl acetate. The aqueous phase was acidified with concentrated hydrochloric acid to pH 2-3 and extracted with ethyl acetate (3 5 mL). The combined organic phase was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated and the crude material was used in the next step without further purification.
EXAMPLE 17C
2-(3-methoxy-4-nitrophenyl)-l -(pyrrolidin-l -yl)ethanone A solution of EXAMPLE 17B (1 g, 4.74 mmol) in thionyl dichloride (20 niL) was stirred at reflux for 3 hours and was concentrated. The residue was diluted with
dichloromethane (20 mL) and was added to a solution of pyrrolidine (0.63 mL. 7. 1 mmol) and diisopropyl ethylamine ( 1 .7 mL. 9.5 mmol). The mixture was stirred at room temperature overnight and was washed with I N aqueous hydrochloridic acid (20 mL) and brine. The organic phase was dried over anhydrous sodium sulfate, filtered and concentrated and the residue was purified by flash chromatography on silica gel eluting with 1/100 methanol dichloromethane to give the title compound.
EXAMPLE 17D
2-(4-amino-3-methoxyphenyl)-l -(pyrrolidin-l-yl)ethanone
To a suspension of Raney Nickel (0.5 g) in methanol (10 mL) was added EXAMPLE 17C (0.9 g, 3.4 mmol). The mixture was degassed with hydrogen three times and stirred at room temperature under hydrogen overnight. The mixture was filtered through a pad of diatomaceous earth and was washed with methanol. The filtrate was concentrated to give the title compound.
EXAMPLE 17E
2-methoxy-4-(2-(pyrrolidin- 1 -y l)ethyl)benzenamine To a solution of EXAMPLE 17D (0.1 , 0.43 mmol) in tetrahydrofuran (10 mL) was added lithium aluminium tetrahydride (49 mg, 1.28 mmol) and the mixture was stirred at room temperature for 2 hours. The mixture was quenched carefully by addition of water and 15% aqueous sodium hydroxide. The suspension was filtered and washed with ethyl acetate. The filtrate was dried over anhydrous sodium sulfate, filtered and concentrated to give the title compound.
EXAMPLE 17F
7-chloro-5-(2-methoxy-4-(2-(pyrrolidin-l -yl)ethyl)phenylamino)pyrido[3,4-d]pyridazin-
4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 20D, using EXAMPLE 17E in place of EXAMPLE 20C.
EXAMPLE 17G
7-(2,6-dichlorobenzy l)-5-({2-methoxy-4-[2-(pyn-olidin-l -yl)ethyl]phenyl }amino)pyrido[3,4- d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 2E, using EXAMPLE 17F in place of EXAMPLE 2D. Ή NMR(DMSO-di, 300 MHz): δ 12.95 (s, 1 H), 1 1.66 (s, 1 H), 8.28 (s, 1 H), 8. 10 (d, J = 7.8Hz, 1 H), 7.60 (d, J = 8.1 Hz, 2 H), 7.47-7.44 (m, 1 H), 6.97 (d, J = 4.8 Hz, 2 H), 6.58 (d, J = 7.8 Hz, 1 H), 4.52 (s, 2 H), 3.90 (s, 3 H), 3.01-3.30 (m, 5 H), 2.80-2.91 (m, 3 H), 1.81-1.93(m, 4 H). MS: 526 (M+H+).
EXAMPLE 18
7-(2.6-dichlorobenzyl)-5-({2-methoxy-4-[2-oxo-2-(pyrrolidin-l- yl)ethyl]phenyl }amino)pyrido[3.4-d)pyridazin-4(3H)-one
EXAMPLE 18A
diethy 1 2-(3-methoxy -4-nitropheny l)malonate To a solution of diethyl malonate (10.3 g, 64.3 mmol) in dry N,N-dimethylformamide (40 mL) at 0°C was added 60% sodium hydride in mineral oil (3.51 g, 88 mmol) in portions over 30 minutes. A solution of 4-fluoro-2-methoxy- l -nitrobenzene (10 g, 58.5 mmol) in N,N-dimethylformamide (10 mL) was added dropwise and the mixture was stirred at 90°C overnight. The mixture was diluted with water and exacted with ethyl acetate (3 x 20 mL). The combined organic phase was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel eluting with 1/20 ethyl acetate/petroleum ether to provide the title compound.
EXAMPLE 18B
2-(3-methoxy-4-nitrophenyl)acetic acid
To a solution of EXAMPLE 18A (0.3 g, 0.96 mmol) in ethanol (2 mL) was added 2N sodium hydroxide (2 mL) and the mixture was stirred at room temperature for 12 hours. The mixture was concentrated, diluted with water and washed with ethyl acetate. The aqueous phase was acidified with concentrated hydrochloridic acid to pH 2-3 and extracted with ethyl acetate (3 5 mL). The combined organic phase was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated and the residue used in the next step without further purification.
EXAMPLE 18C
2-(3-methoxy-4-nitrophenyl)-l -(pyrrolidin-1 -yl)ethanone A solution of EXAMPLE 18B (1 g, 4.74 mmol) in thionyl dichloride (20 mL) was stirred at reflux for 3 hours and the mixture was concentrated. The residue was dissolved in dichloromethane (20 mL) and N,N-diisopropylethylamine (1.7 mL, 9.5 mmol) and pyrrolidine (0.63 mL, 7.1 mmol) was added. The mixture was stirred at room temperature overnight. The mixture was washed with IN aqueous hydrochloric acid and brine, dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel eluting with 1/100 methanol/dichloromethane to provide the title compound. EXAMPLE 18D
2-(4-amino-3 -methoxypheny 1)- 1 -(pyrrolidin- 1 -y l)ethanone To a solution of EXAMPLE 18C (0.9 g, 3.4 mmol) in methanol (10 mL) was added Raney Nickel (0.5 g). The mixture was degassed with hydrogen and stirred at room temperature under hydrogen overnight. The mixture was filtered through a pad of diatomaceous earth and the filtrate was concentrated to afford the title compound.
EXAMPLE 18E
7-chloro-5-(2-methoxy-4-(2-oxo-2-(pyrrolidin-l -yl)ethyl)phenylamino)pyrido[3,4- d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 20D, using EXAMPLE 18D in place of EXAMPLE-20C.
EXAMPLE 18F
7-(2,6-dichlorobenzy l)-5 -( { 2-methoxy -4-[2-oxo-2-(py rrolidin- 1 - yl)ethyl]phenyl}amino)pyrido[3,4-d]pyridazin-4(3H)-one The title compound was obtained following the procedure described in EXAMPLE 2E, using EXAMPLE 18E in place of EXAMPLE 2D. Ή NMR(DMS0-- 300 MHz): δ 12.93 (s, 1 H), 1 1.63 (s, 1 H), 8.27 (s, 1 H), 8.04 (d, J = 8.1Hz, 1 H), 7.58 (d, J = 8. 1 H z, 2 H), 7.44-7.39 (m, 1 H), 6.97 (s, 2 H), 6.88 (s, 1 H), 6.54-6.51 (m, 1 H), 4.51 (s, 2 H), 3.86 (s, 3 H), 3.57 (s, 2 H), 3.48 (t, 2 H), 3.32 (t, 2 H), 1.92-1.77 (m, 4 H). MS: 539 (M+H+).
EXAMPLE 19
7-(2 , 6-dichlorobenzy l)-5 -({ 2 -methoxy -4- [4-(3 -methy lbutanoy l)piperazin- 1 - yl]phenyl}amino)pyrido[3,4-d]pyridazin-4(3H)-one To a solution of EXAMPLE 2F (51 mg, 0.1 mmol) in N,N-dimethylformamide (3 mL) at 0°C was added 3 -methy lbutanoy 1 chloride (13.5 mg, 0.1 1 mmol) and the solution was stirred at 0°C for 1 hour. The reaction was quenched with saturated sodium bicarbonate solution (10 mL) and extracted with ethyl acetate (2 x 50 mL). The combined organic phase was dried, concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 100: 1 dichloromethane/ethanol to give the title compound. Ή NMR (DMSO-i¾, 300 MHz): δ 8.24 (s, 1 H), 7.97 (d, 1 H), 7.62 - 7.59 (m, 2 H), 7.48 - 7.42 (m, 1 H), 7.29 (s, 1 H), 7.12 (s, 1 H), 6.95 (s. 1 H), 6.87 (s, 1 H), 6.67 (s, 1 H), 6.21 (d, 1 H), 4.49 (s, 2 H), 3.88 (s. 3 H), 3.64 (m, 4 H), 3.07 (m. 4 H), 2.29 - 2.26 (m, 2 H), 2.06 - 2.04 (m. 1 H). 0.96 - 0.94 (m. 6 H). MS: 595 (M + H+).
EXAMPLE 20 7-(2,6-dichlorobenzyl)-5-{ [2,5-difluo^
d]py ridazin-4(3 H)-one
EXAMPLE 20A
N,N-dibenzyl-4-bromo-2,5-difluoroaniline
To a mixture of 4-bromo-2,5-difluoroaniline (8 g, 39 mmol) and potassium carbonate
(16 g, 1 16 mmol) in acetonitrile (200 mL) was added (bromomethyl)benzene ( 14.5 g, 85 mmol). After refluxing for 20 hours, the mixture was filtered and the filtrate was concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 5/1 petroleum ether/ethyl acetate to give the title compound. MS: 388 (M+H+).
EXAMPLE 20B
/erf-butyl 4-(4-(dibenzylamino)-2,5-difluorophenyl)piperazine-l -carboxylate A mixture of EXAMPLE 20A (5. 12 g, 13.2 mmol), ieri-butyl piperazine- 1 - carboxy late (2.95 g, 15.8 mmol), palladium acetate ( 149 mg, 0.66 mmol), 2,2'- bis(diphenylphosphosino)- l , l '-binaphthyl (616 mg, 0.99 mmol) and cesium carbonate (8.61 g, 26.4 mmol) in toluene (100 mL) was heated at 100°C under nitrogen for 16 hours. After cooling to room temperature, the mixture was concentrated and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 5/1 petroleum ether/ethyl acetate to give the title compound.
EXAMPLE 20C
teri-butyl 4-(4-amino-2,5-difluorophenyl)piperazine-l -carboxy late To a solution of EXAMPLE 20B (4 g. 8 mmol) in methanol (100 mL) was added 10% palladium on carbon (400 mg). The mixture was stirred at room temperature under hydrogen for 16 hours. The catalyst was filtered off and the filtrate was concentrated to give the title compound. MS: 314 (M+H+).
EXAMPLE 20D
tert-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-i/]pyridazin-5-ylamino)-2,5- difluorophenyl) piperazine- 1 -carbox late
A solution of EXAMPLE 7K (70 mg, 0.33 mmol), EXAMPLE 20C (100 mg , 0.38 mmol) and NN-diisopropylethylamine (0.1 mL, 0.57 mmol) in dioxane (5 mL) was stirred at 120 C for 15 hours. After cooling to ambient temperature, the mixture was concentrated and was purified by flash chromatography on silica gel (200-300 mesh) eluting with 30/1 dichloromethane/methanol to give the title compound. MS: 493 (M + H+).
EXAMPLE 20E f£ /-butyl 4-(4-(7-(2,6-dichlorobenzyl)-4-oxo-3,4-dihydropyrido[3,4-^pyridazin-5-ylamino)- 2 ,5 -difluoropheny l)piperazine- 1 -carboxy late
A solution of EXAMPLE 20D (70 mg, 0.14 mmol), a solution of 0.5M (2,6-dichloro benzyl) zinc(II) bromide in tetrahydrofuran (2.8 mL , 1.4 mmol), tris(dibenzylideneacetone) dipalladium (4 mg, 0.005 mmol), 2-(dicyclohexylphosphino)-2',4',6'-triisopropyl-l , l '- biphenyl (8 mg, 0.02 mmol) and potassium 2-methylpropan-2-olate (50 mg, 0.5 mmol) in 2- meth lpropan-2-ol (2 mL) was degassed with nitrogen twice and was stirred in a sealed tube at 120 for 15 hours. After cooling to ambient temperature, the mixture was concentrated and was purified by flash chromatography on silica gel eluting with 100: 1
dichloromethane/ethanol to give the title compound. MS: 617 (M + H+).
EXAMPLE 20F
7-(2,6-dichlorobenzyl)-5-{ [2,5-difluoro-4-(piperazin-l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
To a solution of EXAMPLE 20E ( 1 0 mg, 0.16 mmol) in dichloromethane ( 10 mL) was added 2.2.2-trifluoroacetic acid (2 mL) dropwise. After stirring at ambient temperature for 12 hours, the mixture was concentrated and was purified by preparative HPLC using a gradient of 10/90 to 80/20 acetronitrile in water (containing 0. 1% trifluoroacetic acid) to give the title compound. Ή NMR (DMS0-< 300 MHz): 513.13 (s. 1 H), 1 1.66 (s, 1 H), 8.72 (brs, 2 H), 8.37 (s, 1 H), 8.16 - 8.09 (m, 1 H), 7.56 - 7.54 (m, 2 H), 7.42 - 7.37 (m, 1 H), 7.18 - 7.13 (m , 2 H), 4.54 (s, 2 H), 3.28 - 3.18 (m, 8 H). MS: 517 (M + H+).
EXAMPLE 21
7-(2,6-dichlorobenzyl)-5-{ [2,6-dimethyl-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
EXAMPLE 21 A
ier/-butyl 4-(3,5-dimethyl-4-nitrophenyl)piperazine-l -carboxy late
A suspension of 5-fluoro- l,3-dimethyl-2-nitrobenzene (3.5 g, 20.49 mmol), tert-buty\ piperazine-1 -carboxy late (4.62 g, 24.82 mmol) and potassium carbonate (4.29 g, 31.04 mmol) in NN-dimethylformamide (50 mL) was heated at 110°C for 15 hours. After cooling to ambient temperature, water (50 mL) was added and the mixture was extracted with dichloromethane. The combined organic layers were dried over anhydrous sodium sulfate, filtered and concentrated. The residue was recrystallized from ethanol to give the title compound.
EXAMPLE 21 B
tert-but 1 4-(4-amino-3 , 5-dimethy lpheny l)piperazine- 1 -carboxy late A mixture of of EXAMPLE 21 A and Raney -Nickel in methanol (10 mL) was stirred under hydrogen at ambient temperature for 15 hours. The solution was filtered through diatomaceous earth and the filtrate was concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with a gradient of 3/1 to 2/1 petroleum ether/ethyl acetate to give the title compound.
EXAMPLE 21C
ier/-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-iji]pyridazin-5-ylamino)-3,5- dimethy lpheny l)piperazine- 1 -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 20D. using EXAMPLE 21 B in place of EXAMPLE 20C. MS: 485 (M + H+).
EXAMPLE 21 D
feri-butyl 4-(4-(7-(2,6-dichlorobenzyl)-4-oxo-3,4-dihydropyrido[3,4-<5f|pyridazin-5-ylamino)- 3 ,5 -dimethy lpheny l)piperazine- 1 -carbox late
The title compound was obtained following the procedure described in EXAMPLE 20E, using EXAMPLE 21C in place of EXAMPLE 20D. MS: 609 (M + rT).
EXAMPLE 21 E
7-(2,6-dichlorobenzyl)-5-{ [2,6-dimethyl-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
The title compound was obtained following the procedure described in EXAMPLE 20F. using EXAMPLE 21 D in place of EXAMPLE 20E. Ή NMR (CD,OD, 300 M Hz): δ 8.03 (s. 1 H), 7.32 (d, J= 1 .8 Hz. 1 H), 7.29 (s. 1 H), 7.21 (m. 1 H). 6.71 (s, 1 H). 6.48 (s. 1 H), 4.29 (s, 2 H), 3.41 (m, 8 H), 2.05 (s, 6 H). MS: 509 (M + H+).
EXAMPLE 22
5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}-7-{[2-(propan-2- ylsulfonyl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one
EXAMPLE 22A
/er/-butyl 4-(4-(7-(2-(isopropylsulfonyl)phenylamino)-4-oxo-3.4-dihydropyrido[3,4- c/]pyridazin-5-ylamino)-3-methoxyphenyl)piperazine- l -carboxy late To a solution of EXAMPLE 24A ( 153 mg, 0.25 mmol) in rf-butanol (5 mL) was added 2-(isopropylsulfonyl)benzenamine (50 mg, 0.25 mmol), potassium ieri-butoxide (84 mg, 0.75 mmol), 2-dicyclohexylphosphino-2',4',6'-triisopropylbiphenyl (12 mg, 0.025 mmol) and tris(dibenzylideneacetone)dipalladium(0) (23 mg, 0.025 mmol) and the mixture was heated at 120°C in a Biotage Microwave Synthesizer for 1 hour. After cooling to ambient temperature, the mixture was concentrated and the residue was purified by flash chromatography on silica gel eluting with 50/1 dichloromethane/methanol to give the title compound. MS: 650 (M + H4).
EXAMPLE 22B
5 -{ [2-methoxy -4-(piperazin- 1 -y l)pheny l]amino } -7- { [2-(propan-2- ylsulfonyl)phenyl]amino}pyrido[3.4-d]pyridazin-4(3H)-one
To a solution of EXAMPLE 22 A (90 mg. 0. 14 mmol) in dichloromethane (20 mL) was added 2,2,2-trifluoroacetic acid (4 mL) and the mixture was stirred at ambient temperature for 3 hours. After concentration, the residue was purified by preparative HPLC eluting with a gradient of 10/90 to 30/20 acetonitrile/water (containing 0.1 % trifluoroacetic acid) to give the title compound as a solid trifluoroacetate salt. Ή NMR (DMSO-c4, 300 MHz): δ 12.46 (s, 1 H), 11.46 (s, 1 H), 9.08 (s, 1 H), 8.70 (br, 2 H), 8. 1 1 (s, 1 H), 8.02-7.76 (m, 3 H). 7.45 (t, J = 8.7 Hz, 1 H), 6.71 (s, 1 H), 6.46 (s, 1 H), 6.24 (d. J =8.7 Hz, 1 H)( 3.88 (s, 3 H). 3.43 - 3.30 (m, 9 H). 1. 12 (d, J = 6.6 Hz, 6 H). MS: 550. 1 (M + H+).
EXAMPLE 23
5-{ [2-methox -4-(piperazin-l -yl)phenyl]amino}-7-{ [(4R)-4-(propan-2-yl)-4,5-dihydro- 1 ,3- oxazol-2-yl]amino}pyrido[3,4-d]pyridazin-4-ol
EXAMPLE 23A
(R)-tert-butyl 4-(4-(7-(4-isopropyl-4,5-dihydrooxazol-2-ylamino)-4-oxo-3,4- dmydropyrido[3,4-d]pyridazin-5-ylamino)-3-methoxyphenyl)piperazine-l -carboxylate The title compound was obtained following the procedure described in EXAMPLE
10A, using (R)-4-isopropyl-4,5-dihydrooxazol-2 -amine in place of 2.6-dichlorobenzenamine.
EXAMPLE 23B
5-{ [2-methoxy -4-(piperazin- 1 -yI)phenyI]amino}-7-{ [(4R)-4-(propan-2-yI)-4,5-dihydro- 1.3- oxazol-2-yl]amino}pyrido[3,4-d]pyridazin-4-ol The title compound was obtained following the procedure described in EXAMPLE
2F, using EXAMPLE 23A in place of EXAMPLE 2E. Ή NMR(DMSO-i «, 300 MHz): δ 1 1.1 1 (s, 1 H), 8.27 (s, 1 H), 7.82 (d, J = 8.7Hz, 1 H), 6.77 (s, 1 H), 6.63-6.58 (m, 2 H). 4.90- 4.84 (m, 1 H), 4.71 -4.66 (m, 1 H), 4.17-4.10 (m, 1 H), 3.92 (s, 3 H), 3.39-3.36 (m, 4 H), 3.27- 3.24 (m, 4 H), 1.77-1.72 (m, 1 H), 0.72 (dd, J = 6.6 Hz, 16.8 Hz, 6 H). MS: 479 (M+H+).
EXAMPLE 24
7-[(2-chlorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3.4- d]pyridazin-4(3H)-one
EXAMPLE 24A ieri-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-ci|pyridaziri-5-ylammo)-3- methoxypheny l)piperazine- 1 -carboxy late
A solution of EXAMPLE 7K (70 mg, 0.33 mmol), EXAMPLE 1 G (100 mg , 0.34 mmol) and /VN-diisopropylethylamine (0.1 mL, 0.57 mmol) in dioxane (5 mL) was stirred at 120°C for 15 hours. After cooling to ambient temperature, the mixture was concentrated and was purified by flash chromatography on silica gel (200-300 mesh) eluting with 20/1 dichloromethane/methanol to give the title compound. MS: 487 (M + H+).
EXAMPLE 24B
tert-buty 1 4-(4-(7-(2-chloropheny lamino)-4-oxo-3 ,4-dihy dropy rido[3 ,4-i/]pyridazin-5 - y lamino)-3 -methoxy pheny l)piperazine- 1 -carboxy late A mixture of EXAMPLE 24A (100 mg, 0.21 mmol), 2-chlorobenzenamine (40 mg, 0.31 mmol), tris(dibenzylideneacetone)dipalladium (4 mg, 0.005 mmol), 2- (dicyclohexylphosphino)-2',4',6'-triisopropyl- l, -biphenyl (8 mg, 0.02 mmol) and potassium 2-methylpropan-2-olate (50 mg, 0.5 mmol) in 2-methylpropan-2-ol (2 mL) was degassed with nitrogen twice and was stirred in a sealed tube at 120'C for 15 hours. After cooling to ambient temperature, the mixture was concentrated and purified by flash chromatography on silica gel eluting with 100: 1 dichloromethane/ethanol to provide the title compound. MS: 578 (M + rf).
EXAMPLE 24C
7-[(2-chlorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
To a solution of EXAMPLE 24B ( 160 mg, 0.27 mmol) in dichloromethane (10 mL) was added 2,2,2-trifluoroacetic acid (2 mL) dropwise. The solution was stirred at ambient temperature for 12 hours, concentrated and purified by preparative HPLC using a gradient of 10/90 to 80/20 acetronitrile in water (containing 0. 1% trifluoroacetic acid) to give the title compound. Ή NMR (DMSO-rfg, 300 MHz): δ 12.31 (s, 1 H), 1 1.50 (s, 1 H), 9.19 (s, 1 H), 8.70 (brs, 2 H),8.15 - 8.05 (m, 2 H), 7.71 - 7.45 (m, 2 H), 7.42 - 7.27(m, 2 H), 6.71 (s, 1 H), 6.24 - 6.20 (m, 2 H), 4.01 (s, 3 H), 2.76 (brs, 8 H). MS: 478 (M + H+).
EXAMPLE 25
7-[(5-chloro-2-fluorophenyl)amino]-5-{[2-methoxy-4-(piperazin- l- y l)pheny l]amino }py rido [3 ,4-d]py ridazin-4(3 H)-one
EXAMPLE 25A
ier/-butyl 4-(4-(7-(5-chloro-2-fluorophenylamino)-4-oxo-3,4-dihydropyrido[3,4-i/]pyridazin- 5 -y lamino)-3 -methoxy pheny l)piperazine- 1 -carboxy late The title compound was obtained following the procedure described in EXAMPLE 24B, using 5-chloro-2-fluoroaniline in place of 2-chlorobenzenamine. MS: 596 (M + H+).
EXAMPLE 25B
7- [(5 -chloro-2 -fluoropheny l)amino] -5- { [2-methoxy -4-(piperazin- 1 - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 24C, using EXAMPLE 25 A in place of EXAMPLE 24B. Ή NMR (DMSO-i¾, 300 MHz): δ 12.41 (s, 1 H), 1 1.49 (s, 1 H), 8.42 (s, 1 H), 8.71 (brs, 2 H), 8. 14 - 8.08 (m, 2 H), 8.01 - 7.87 (m, 1 H), 7.39 - 7.35 (m, 1 H), 7.22 -7.18 (m, 1 H), 6.75 (s, 1 H), 6.42 - 6.38 (m, 2 H). 3.90 (s, 2 H), 8.32 (brs, 8 H). MS: 496 (M + H+).
EXAMPLE 26
7-(2,6-dichlorobenzyl)-5-{ [2-fluoro-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4-d]pyridazin-
4(3H)-one
EXAMPLE 26A
iert-buty 1 4-(3 -fluoro-4-nitropheny l)piperazine- 1 -carboxy late
A mixture of 4-bromo-2-fluoro- l -nitrobenzene (5 g, 23 mmol), ieri-butyl piperazine- 1 -carboxylate (4.24 g, 23 mmol), palladium diacetate (0.51 g, 2.3 mmol), (±)-2,2'- bis(diphenylphosphino)-l , l '-binaphthalene (2.13 g, 3.4 mmol) and cesium carbonate (14.8 g, 45 mmol) in toluene (120 mL) was heated under nitrogen at 60°C for 20 hours. After cooling to ambient temperature, the mixture was concentrated and the residue was diluted with dichloromethane (300 mL) and washed with water. The combined organic phase was washed with brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 3/1 petroleum ether/ethyl acetate to give the title compound. MS: 348 (M + Na ).
EXAMPLE 26B
/er/-butyl 4-(4-amino-3-fluorophenyl)piperazine- 1 -carboxy late A mixture of EXAMPLE 26A (1.6 g, 4.9 mmol), zinc dust (3.2 g, 49 mmol) and acetic acid (5.4 mL) in 1/1 tetrahydrofuran methanol (100 mL) was stirred at ambient temperature for 1 hour. The mixture was filtered and the filtrate was diluted with water and adjusted to pH 9. The mixture was extracted with ethyl acetate and the combined organic phase was washed with brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 99/1 dichloromethane/methanol to give the title compound. MS: 296 (M+H+).
EXAMPLE 26C ier/-butyl 4-(4-(7-chloro-4-hydroxypyrido[3,4-(^pyridazin-5-ylamino)-3- fluoropheny l)piperazine- 1 -carboxy late
A solution of EXAMPLE 7K (70 mg, 0.33 mmol), EXAMPLE 26B (100 mg, 0.34 mmol) and NN-diisopropylethylamine (0.1 mL, 0.57 mmol) in dioxane (15 mL) was stirred at 120 °C for 15 hours. After cooling to ambient temperature, the mixture was concentrated and was purified by flash chromatography on silica gel eluting with 100/1
dichloromethane/methanol. MS: 475 (M + H+).
EXAMPLE 26D
ierZ-butyl 4-(4-(7-(2,6-dichlorobenzyl)-4-hydroxypyrido[3,4-t/]pyridazin-5-ylamino)-3- fluoropheny l)piperazine- 1 -carboxy late
To a solution of EXAMPLE 26C (159 mg, 0.33 mmol) in tetrahydrofuran (2 mL) was added tetrakis(triphenylphosphine) palladium(O) (5 mg) and 0.6M (2,6- dichlorobenzyl)zinc(II) bromide in tetrahydrofuran (8 mL, 4.8 mmol) and the mixture was degassed with nitrogen twice and was stirred at 65 C for 15 hours. After cooling to ambient temperature, the reaction was quenched with saturated ammonium chloride solution (10 mL) and the mixture was extracted with ethyl acetate (3 x 25 mL). The combined organic phase was washed with saturated brine solution, dried over anhydrous magnesium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 100/1 dichloromethane/methanol to give the title compound. MS: 599 (M + H+).
EXAMPLE 26E
7-(2,6-dichlorobenzyl)-5-{ [2-fluoro-4-^iperazin-l-yl)phenyl]amino}pyrido[3,4-d]pyridazin-
4(3H)-one
To a solution of EXAMPLE 26D (160 mg, 0.27 mmol) in dichloromethane (10 mL) was added 2,2,2-trifluoroacetic acid (2 mL) dropwise. The solution was stirred at ambient temperature for 12 hours, and was concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 100/1 dichloromethane/ethanol to give the title compound. Ή NMR (DMSO-^. 300 MHz): δ 13.00 (s. 1 H), 1 1 .41 (s. 1 H), 8.74 (brs, 2 H). 8.32 (s, 1 H), 8.06 - 8.00 (m, 1 H), 7.63 - 7.60 (m, 2 H), 7.48 - 7.43 (m, 1 H), 7.03 - 6.97 (m , 2 H), 6.52 (d, J = 9.0 Hz 1 H), 4.51 (s, 2 H), 3.36 - 3.28 (m, 8 H).
EXAMPLE 27
7-[(2-chloro-5-fluorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l- y l)pheny l]amino }py rido [3 ,4-d]py ridazin-4(3 H)-one
EXAMPLE 27A ie -butyl 4-(4-(7-(2 hloro-5-fluorophenylamino)-4-oxo-3.4-dihydropyrido[3,4-^pyridaziri- 5 -y lamino)-3-methoxy pheny l)piperazine- 1 -carboxy late The title compound was obtained following the procedure described in EXAMPLE 24B, using 2-chloro-5-fiuoroaniline in place of 2-chlorobenzenamine. MS: 596 (M + H+).
EXAMPLE 27B
7-[(2-chloro-5-fluorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l- yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one The title compound was obtained following the procedure described in EXAMPLE 24C, using EXAMPLE 27A in place of EXAMPLE 24B. Ή NMR (DMSO-cfe, 300 MHz): δ 12.41 (s. 1 H). 1 1.45 (s. 1 H), 9.20 (s, 1 H), 8.74 (brs. 2 H). 8. 1 1 - 8.08 (m, 2 H), 7.78 - 7.75 (m, 1 H), 7.48 - 7.43 (m, 2 H), 7.63 - 7.58 (m, 1 H), 7. 12 - 7.05 (m, 1 H), 6.73 (s, 1 H), 6.42 (s. 1 H), 6.31 - 6.28 (m, 1 H), 3.89 (s, 3 H), 3.31 (brs, 8 H). MS: 496 (M + H+).
EXAMPLE 28
7-[(2,5-dichlorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 28A
tert-buty] 4-(4-(7-(2,5-dichlorophenylamino)-4-oxo-3,4-dihydropyrido[3,4-i/]pyridazin-5- ylamino)-3-methoxyphenyl)piperazine-l -carboxy late A mixture of EXAMPLE 24A ( 100 mg, 0.21 mmol), 2.5-dichloroaniline (33 mg. 0.21 mmol), tris(dibenzylideneacetone)dipalladiurr) (19 mg, 0.02 mmol), dimethylbisdiphenyl phosphinoxanthene (12 mg, 0.02 mmol), potassium ter wtoxide (71 mg, 0.63 mmol) and /er/-butanol (2 mL) was heated at 120°C under nitrogen for 48 hours. The mixture was concentrated and the residue was dissolved in dichloromethane, washed with saturated aqueous sodium bicarbonate and brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 98/2 dichloromethane/methanol to give the title compound. MS: 61 1 (M + H+).
EXAMPLE 28B
7-[(2.5-dichlorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
To a solution of EXAMPLE 28A (50 mg, 0.08 mmol) in dichloromethane (4 mL) was added trifluoroacetic acid ( 1 mL) dropwise. After stirring at ambient temperature for 4 hours, the mixture was concentrated and the residue was purified by preparative HPLC using a gradient of 10/90 to 90/10 acetronitrile in water (containing 0.1% trifluoroacetic acid) to give the title compound. Ή NMR (DMSO-c^, 300 MHz): δ 12.39 (s, 1 H), 11.53 (s, 1 H), 9.24 (s, 1 H), 8.75 - 8.07 (m, 2 H), 7.90 (d, J = 2.4 Hz, 1 H), 7.61 (d, J = 8.7 Hz, 1 H), 7.29 (dd, J = 8.4 Hz, 2.4 Hz, 1 H), 6.73 (d, J = 2.4 Hz, 1 H), 6.38 (s, 1 H), 6.31 (dd, J = 9.0 Hz, 2.4 Hz, 1 H), 3.89 (s, 3 H), 3.29 (s, 8 H). MS: 512 (M + ϊΓ).
EXAMPLE 29
7-[(2-chloro-6-fluorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l- yl)phenyl]amino}pyrido[3.4-d]pyridazin-4(3H)-one
EXAMPLE 29A
/er/-butyl 4-(4-(7-(2-chloro-6-fluorophenylamino)-4-oxo-3,4-dihydropyrido[3,4-c/]pyridazin- 5-ylamino)-3-methoxyphenyl)piperazine-l -carboxylate A mixture of EXAMPLE 24A (370 mg, 0.76 mmol), 2-chloro-6-fluoroaniline ( 121 mg, 0.84 mmol), tris(dibenzylideneacetone)dipalladium (70 mg, 0.08 mmol), 2- dicyclohexylphosphino-2',4',6'-triisopropylbiphenyl (44 mg, 0.1 mmol), potassium tert- butoxide (257 mg, 2.28 mmol) and teri-butanol (5 mL) was heated under nitrogen at 120°C for 48 hours. The mixture was concentrated and the residue was dissolved in
dichloromethane, washed with saturated aqueous sodium bicarbonate and brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 98/2 dichloromethane/methanol to give the title compound. MS: 596 (M + H+).
EXAMPLE 29B
7-[(2-chloro-6-fluorophenyl)amino]-5-{[2-methoxy-4-(piperazin- l- yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one The title compound was obtained following the procedure described in EXAMPLE 28B. using EXAMPLE 29A in place of EXAMPLE 28A. Ή NMR (CD3OD. 300 MHz): δ 8.02 - 7.95 (m. 2 H), 7.45 - 7.37 (m, 2 H). 7.29 - 7.24 (m. 1 H), 6.70 (brs. 2 H). 6.15 (brs. 2 H), 3.96 (brs, 3 H), 3.40 - 3.38 (m, 8 H). MS: 496 (M + H+).
EXAMPLE 30
7-(2,6-dichlorobenzyl)-5-{ [2-methoxy-4-(4-methylpiperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3 H)-one
EXAMPLE 3 OA
2-methoxy-4-(4-methy lpiperazin- 1 -yl)aniline
The title compound was obtained following the procedure described in EXAMPLE 1 F-G, using 1-methylpiperazine in place of tert-butyl piperazine-l -carboxylate.
EXAMPLE 30B
7-chloro-5-(2-methoxy-4-(4-methy lpiperazin- l-yl)pheny lamino)py rido[3.4-i/]py ridazin- 4(3H)-one
To a solution of EXAMPLE 7K (120 mg, 0.56 mmol) in dioxane (10 mL) was added EXAMPLE 30A (136 mg, 0.6 ] mmol) and NN-diisopropy lethylamine (724 mg, 5.6 mmol) and the mixture was stirred at 120°C in a sealed tube for 16 hours. The mixture was cooled to ambient temperature, poured into water (50 mL) and extracted with ethy l acetate (3 * 50 mL). The organic layer was dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on si lica gel (200-300 mesh) eluting with 50/1 dichlomethane/methanol to give the title compound. MS : 401 (M + IT).
EXAMPLE 30C
7-(2,6-dichlorobenzyl)-5-{ [2-methoxy-4-(4-methylpiperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3 H)-one
To a solution of EXAMPLE 30B (200 mg, 0.5 mmol) in tetrahydrofuran (10 mL) was added 0.6M (2.6-dichlorobenzyl)zinc(II) bromide in tetrahydrofuran (8 mL. 5 mmol) and tetrakis(triphenylphosphine)palladium (21 mg, 0.05 mmol) and the mixture was stirred at 70°C under nitrogen for 16 hours. The mixture was cooled to ambient temperature, poured into water (50 mL) and extracted with ethyl acetate (3 χ 50 mL). The organic layer was dried over anhydrous sodium sulfate, filtered, concentrated and purified by preparative HPLC eluting with a gradient of 10/90 to 30/20 acetonitrile/water (containing 0. 1 % trifluoroacetic acid) to give the title compound as a solid trifluoroacetate salt. Ή NMR (DMSO-c/e, 300 ΜΗζ): δ 12.88 (s, 1 H), 11 .47 (s, 1 H). 9.70 (br, 1 H), 8.23 (s, 1 H), 8.01 (d, .7 = 9.0 Hz, 1 H), 7.58 (d, J = 8.4 Hz, 2 H), 7.42 (t, J = 8.4 Hz, 1 H), 6.85 (s, 1 H). 6.69 (s, 1 H), 6.24 (d. J = 9.0 Hz, 1 H), 4.46 (s, 2 H), 3.87 (s, 3 H), 3.83-3.79 (m, 2 H). 3.56 - 3.52 (m, 2 H), 3.19 -3.16 (m. 2 H), 2.95 - 2.88 (m, 5 H). MS : 525. 1 (M + H+).
EXAMPLE 31
7-[(3,5-dichlorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 31 A
r/-butyl 4-(4-(7-(3,5-dichlorophenylamino)-4-oxo-3,4-dihydropyrido[3,4-(/|pyridazin-5- ylamino)-3-methoxyphenyl)piperazine- l -carboxylate A mixture of EXAMPLE 24A (120 mg, 0.25 mmol), 3,5-dichloro benzenamine (80 mg, 0.5 mmol), tris(dibenzyldeneacetone)dipalladium(0) (23 mg, 0.025 mmol), 2- dicyclohexylphosphino-2',4',6'-triisopropylbiphenyl (12 mg, 0.025 mmol), potassium tert- butoxide (47g, 0.42 mmol) and /er/-butanol (6.0 mL) was degassed with nitrogen for 5 minutes and heated at 120°C under nitrogen for 16 hours. After cooling to ambient temperature, the mixture was concentrated and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with a gradient of 100/1 to 80/1 dichloromethane/methanol to provide the title compound. MS: 612 (M + H+).
EXAMPLE 3 IB
7-[(3,5-dichlorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 20F, using EXAMPLE 31 A in place of EXAMPLE 20E. Ή NMR (DMSO-a^. 300 MHz): δ 12.45 (s, 1 H), 1 1.37 (s, 1 H), 9.85 (s, 1 H). 8.72 (brs. 2 H), 8. 14 (s. 1 H). 8.07 (d. = 8.7 Hz, 1 H), 7.67 (d, J = 1.8 Hz, 2 H), 7. 15 (d. J = 1.8 Hz, 1 H), 6.79 (s, 1 H), 6.56 (d, J = 8.7 Hz, 1 H), 6.26 (s, 1 H), 3.90 (s, 3 H), 3.35 (brs, 4 H), 3.30 (brs, 4 H). MS: 515 (M + H+).
EXAMPLE 32
7-[(2,6-difluorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l-yl)phenyl]amino}pyrido[3,4- d]py ridazin-4(3 H)-one
EXAMPLE 32A
terf-butyl 4-(4-(7-(2,6-difluorophenylamino)-4-oxo-3,4-dihydropyrido[3,4-i/|pyridazin-5- ylamino)-3-methoxyphenyl)piperazine-l -carboxylate The title compound was obtained following the procedure described in EXAMPLE 31 A, using 2,6-difluorobenzenamine in place of 3,5-dichlorobenzenamine. MS: 580 (M + m.
EXAMPLE 32B
7-[(2,6-difluorophenyl)amino]-5-{[2-methoxy-4-(piperazin- l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE
20F. using EXAMPLE 32A in place of EXAMPLE 20E. Ή NMR (DMS0-< 300 MHz): δ 12.32 (s, 1 H), 1 1.51 (s, 1 H), 9.18 (s, 1 H), 8.71 (brs, 2 H), 8.07 - 7.90 (m, 2 H), 7.31 - 7.26 (m, 3 H), 6.67 (d, J = 2.4 Hz, 1 H), 6.20 - 6.15 (m, 2 H), 3.87 (s, 3 H), 3.28 (brs, 8 H). MS: 480 (M + H+).
EXAMPLE 33
7-[(3,5-dichloropyridin-4-yl)amino]-5-{[2-methoxy-4-(piperazin-l - y l)pheny ljamino }py rido [3 ,4-d]py ridazin-4(3 H)-one
EXAMPLE 33A tert-but ] 4-(4-(7-(3.5-dichloropyridin-4-ylamino)-4-oxo-3,4-dihydropyrido[3,4-^pyrid 5-ylamino)-3-methoxyphenyl)piperazine-l -carboxylate The tide compound was obtained following the procedure described in EXAMPLE 31A, using 3,5-dichloropyridin-4-amine in place of 3,5-dichlorobenzenamine. MS: 613 (M + H+).
EXAMPLE 33B
7-[(3,5-dichloropyridin-4-yl)amino]-5-{[2-methoxy-4-(piperazin-l - y l)pheny l]amino }pyrido [3 ,4-d]py ridazin-4(3H)-one The title compound was obtained following the procedure described in EXAMPLE 20F, using EXAMPLE 33A in place of EXAMPLE 20E. Ή NMR (DMSO-c e, 300 MHz): δ 12.44 (s, 1 H), 1 1.50 (s, 1 H), 9.79 (s, 1 H), 8.77 (brs, 4 H), 8.13 (s, 1 H), 7.68 (d. J = 8.7 Hz, 1 H), 6.68 (brs, 1 H). 6.34 (s. 1 H), 6.04 (d, ./ = 8.7 Hz, 1 H), 3.87 (s, 3 H), 3.27 (brs, 8 H). MS: 513 (M + H+).
EXAMPLE 34
7-[(2,4-dichlorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
EXAMPLE 34A
feri-butyl 4-(4-(7-(2,4-dichlorophenylamino)-4-oxo-3,4-dihydropyrido[3,4-c ]pyridazin-5- ylamino)-3-methoxyphenyl)piperazine-l -carboxylate A suspension of EXAMPLE 24A (100 mg, 0.21 mmol). 2,4-dichlorobenzenamine (33 mg, 0.21mmol), tris(dibenzylideneacetone)dipaIladium ( 19 mg, ().02 I mmoI), 2- dicyclohexylphosphino-2',4',6'-triisopropylbiphenyl (10 mg, 0.021 mmol) and potassium 2- methylpropan-2-olate (71 mg, 0.63 mmol) in 2-methylpropan-2-ol (3 mL) was degassed with nitrogen 6 times and was heated in a sealed tube at 120°C for 2 days. After cooling to ambient temperature, the mixture was concentrated and the residue was diluted with dichloromethane (25 mL) and water (25 mL). The aqueous phase was separated and extracted with dichloromethane (2 x 25 mL). The combined organic layer was washed w ith brine, dried over sodium sulfate, filtered, and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with a gradient of 75/1 to 70/1 dichloromethane/methanol to give the title compound. MS: 612 (M + H+).
EXAMPLE 34B
7-[(2,4-dichlorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
To a solution of EXAMPLE 34A (55 mg, 0. 107 mmol) in dichloromethane (6 mL) was added trifluoroacetic acid (3 mL) and the mixture was stirred at ambient temperature for 3 hours. The mixture was concentrated and the residue was purified by preparative HPLC using a gradient of 10/90 to 80/20 acetronitrile in water (containing 0.1 % trifluoroacetic acid) to provide the title compound. Ή NMR (DMSO-i/*, 300 MHz): δ 12.28 (s, 1 H), 11.35 (s, 1 H), 9.20 (s, 1 H), 8.68 (brs, 2 H). 8.01 (s, 1 H), 7.92 (d, J = 9 Hz, 1 H), 7.71 (d. .7 = 2.1 Hz, 1 H), 7.63 (d, J = 8.4 Hz, 1 H), 7.42 (/ = 8.7 Hz, 2.4 Hz, 1 H). 6.67 (d, J= 2.7 Hz, 1 H), 6.21 (s. 1 H), 6.15 (dd, J = 8.4 Hz, 1.8 Hz, 1 H), 3.83 (s, 3 H), 3.26 (m, 8 H). MS: 512 (M + H+).
EXAMPLE 35
7-[(2,6-dichloro-4-fluorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol
EXAMPLE 35A
/er/-butyl 4-(4-(7-(2.6-dichloro-4-fluorophenylamino)-4-oxo-3.4-dihydropyrido [4,3- <^pyridazin-5-ylamino)-3-methoxyphenyl)piperazine- l -carboxylate The title compound was obtained following the procedure described in EXAMPLE 34A, using 2,6-dichloro-4-fluoroaniline in place of 2,4-dichlorobenzenamine. MS: 630 (M +
H+).
EXAMPLE 35B
7-[(2,6-dichloro-4-fluorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol The title compound was obtained following the procedure described in EXAMPLE 34B, using EXAMPLE 35A in place of EXAMPLE 34A. Ή NMR (CD3OD, 300 MHz): δ 8.12 (d, J = 8.4 Hz, 1 H). 7.90 (d, J = 6.3 Hz, 1 H), 7.69 (m, 1 H), 7.43 (d, J = 8.4 Hz, I H), 7.35 (dd, J = 8.4 Hz, 2.7 Hz, 1 H), 7.12 (m, 1 H), 6.68 (d, J = 8.7 Hz, 1 H), 6.30 (s, 1 H), 6. 14 (s, 1 H), 3.92 (s, 3 H), 3.315 (m, 8 H). MS: 529.4 (M + H+).
EXAMPLE 36
7-[(2-methoxyethyl)amino]-5-{ [2-methoxy-4-(piperazin- l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
EXAMPLE 36A
/er/-butyl 4-(3-methoxy-4-(7-(2-methoxyethy lamino)-4-oxo-3.4-dihydropyrido[3,4- i/]pyridazin-5-ylamino)phenyl)piperazine- l -carbox late The title compound was obtained following the procedure described in EXAMPLE 34A, using 2-methoxyethanamine in place of 2,4-dichlorobenzenamine. MS: 526.6 (M + H+).
EXAMPLE 36B 7-[(2-methoxyethyl)ammo]-5-{ [2-methoxy-4-(piperazin- l-yl)phenyl]amino}pyr
d]pyridazin-4-ol
The title compound was obtained following the procedure described in EXAMPLE 34B, using EXAMPLE 36A in place of EXAMPLE 34A. Ή NMR (DMS0-< 300 MHz): δ 12.04 (s, 1 H), 1 1.50 (s, 1 H), 8.57 (brs, 2 H), 8.51 (d, J = 8.7 Hz, 1 H), 7.86 (s, 1 H), 7.47 (brs, 1 H), 0.72 (d, J = 2.7, 1 H), 6.49 (dd, J= 6 Hz, 2.4Hz, 1 H), 5.90 (s, 1 H), 3.87 (s, 3 H), 3. 1 (s, 3 H), 3.30 (m, 5 H), 3.24 (m, 7 H). MS: 426.6 (M + H+).
EXAMPLE 37
7-[(2,3-difluorophenyl)amino]-5-{ [2-methoxy-4-(piperazin- l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 37A
ter/-butyl 4-(4-(7-(2,3-difluorophenylamino)-4-oxo-3,4-dihydropyrido[3,4-c/| pyridazin-5- y lamino)-3 -methoxy pheny l)piperazine- 1 -carboxy late A suspension of EXAMPLE 24A (600 mg, 1.2 mmol), 2,3-difluorobenzenamine (191 mg, 1.5 mmol), tris(dibenzylidene acetone) dipalladium (110 mg, 0.12 mmol), 2- dicyclohexylphosphino-2',4',6'-triisopropylbiphenyl ( 114 mg. 0.24 mmol) and potassium tert- butoxide (276 mg. 2.5 mmol) in /er/-butanol (50 mL) was heated in sealed tube at 120°C under nitrogen for 16 hours. After concentration, the residue was purified by flash chromatography on silica gel (200-300 mesh) 50/1 eluting with dichloromethane/methanol to give the title compound. MS: 580 (M + H+).
EXAMPLE 37B
7-[(2,3-difluorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
To a solution of EXAMPLE 37A (380 mg, 0.66 mmol) in dichloromethane (30 mL) was added trifluoroacetic acid (6 mL) and the mixture was stirred at ambient temperature for 2 hours. The mixture was concentrated and the residue was washed with 1/10
dichloromethane/hexane to give the title compound. Ή NMR (DMSO-(¾, 300 MHz): δ 12.35 (s, 1 H), 11.42 (s, 1 H), 9.43 (s, 1 H), 8.70 (brs, 2 H), 8.07 (m, 2 H), 7.50 (m, 1 H). 7.19 (m, 2 H), 6.70 (d, 1 H), 6.25 (m, 2 H), 3.90 (s, 3 H), 3.28 (m, 8 H). MS: 480 (M + H+).
EXAMPLE 38
7-[(furan-2-ylmethyl)amino]-5-{ [2-methoxy-4-(piperazin-l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
EXAMPLE 38A
/er/-butyl 4-(4-(7-(furan-2-ylmethylamino)-4-oxo-3.4-dihydropyrido[3,4-i5f|pyridazin-5- ylamino)-3-methoxyphenyl)piperazine- l -carboxylate
A mixture of EXAMPLE 24A (52.6 mg, 0.109 mmol) and furan-3-ylmethanamine (21.1 mg, 0.218 mmol) in 1 ,4-dioxane (4 mL) was heated in a sealed tube at 120°C for 15 hours. After cooling to ambient temperature, the mixture was concentrated and the residue was purified by flash chromatography on silica gel (20 -300 mesh) eluting with 50/1 dichloromethane/methanol to give the title compound. MS: 548 (M + H+).
EXAMPLE 38B
7-[(furan-2-ylmethyl)amino]-5-{ [2-methoxy-4-(piperazin- l-yl)phenyl]amino}pyrido[3.4- d]pyridazin-4-ol
The title compound was obtained following the procedure described in EXAMPLE
34B, using EXAMPLE 38A in place of EXAMPLE 34A. Ή NMR (DMS0-< 300 MHz): δ 12.07 (s, 1 H), 11.47 (s, 1 H), 8.74 (brs, 2 H), 8.48 (d, J = 2.1 Hz, 1 H), 7.89 (m, 2 H), 7.60 (m, 1 H), 6.71 (d. =1.8 Hz, 1 H), (dd, J = 5.7 Hz, 1.8 Hz, 1 H), 6.39 (m, 1 H), 6.27 (m, 1 H). 5.95 (s, 1 H), 4.54 (d, J = 4.8 Hz, 2 H), 3.87 (s, 3 H), 3.32 (m, 4 H), 3.25 (m, 4 H). MS: 448 (M + H+).
EXAMPLE 39
5 -{ [2-methoxy -4-(piperazin- 1 -y l)pheny ljamm^
4(3H)-one
EXAMPLE 39A
/ert-butyl 4-(3-methoxy-4-(4-oxo-7-(piperidin-l -yl)-3,4-dihydropyrido[3,4-flf]pyridazin-5- y lamino)pheny l)piperazine- 1 -carboxy late
A solution of EXAMPLE 24A (100 mg, 0.21 mmol) and piperidine (0. 1 mL, 1 mmol) in dioxane (10 mL) was stirred at 120°C for 13 hours. After cooling to ambient temperature, the mixture was concentrated to give the title compound which was used in the next step without further purification. MS: 536 (M + hT).
EXAMPLE 39B
5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino }-7-( iperidin- l -yl)pyrido[3.4-d]pyridazin-
4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 26E, using EXAMPLE 39A in place of EXAMPLE 26D. Ή NMR (DMSO-< , 300 MHz): δ 12. 17 (s, 1 H), 1 1.36 (s, 1 H), 8.73 (brs, 2 H), 8.35 (d, J = 9.0 Hz, 1 H), 8.14 - 8.08 (m, 2 H), 8.01 - 7.87 (m. 1 H), 7.39 - 7.35 (m. 1 H), 7.22 - 7. 18 (m. 1 H), 6.75 (s, 1 H), 6.42 - 6.38 (m, 2 H). 3.90 (s, 3 H). 3.68 (brs, 4 H), 3.32 (brs, 8 H). 1.68 - 1.59 (m, 6 H). MS: 436 (M + H+).
EXAMPLE 40 7-(benzylamino)-5-{ [2-methoxy-4-(piperazm- l -yl)phenyl]amino}pyrido[3.4-d
4(3H)-one
EXAMPLE 40A
/eri-butyl 4-(4-(7-(benzylamino)-4-oxo-3,4-dihydropyrido[3,4-(^pyridazin-5-ylamino)-3- methoxyphenyl)piperazine-l -carboxylate
The title compound was obtained following the procedure described in EXAMPLE 24B, using benzylamine in place of 2-chlorobenzenamine. MS: 558 (M + H+).
EXAMPLE 40B
7-(benzylamino)-5-{ [2-methoxy-4-(piperazm-l -yl)phenyl]amino}pyrido[3.4-d]pyridazin-
4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 26E, using EXAMPLE 40A in place of EXAMPLE 26D. Ή NMR (DMS0- , 300 MHz): δ 12.07 (s, 1 H), 1 1.46 (s, 1 H), 8.69 (brs, 2 H), 8.35 (brs, 1 H), 7.98 - 7.91 (m, 2 H), 7.38 - 7.26 (m, 5 H), 6.71 (s, 1 H), 6.43 -6.40 (m, 1 H), 5.98 (s, 1 H), 4.59 (brs, 1 H), 3.88 (s, 3 H), 3.31 - 3.27 (m, 8 H). MS: 458 (M + H+).
EXAMPLE 41
5-{ [2-methoxy-4-(piperazin-l - l)phenyl]amino}-7-phenylpyrido[3,4-d]pyridazin-4(3H)-one
EXAMPLE 41 A
tert-buty 1 tert-buty 1 4-(3 -methoxy -4-(4-oxo-7-pheny 1-3 ,4-dihy dropy rido [3.4-i/]py ridazin-5 - y lamino)pheny l)piperazine- 1 -carboxy late
To a solution of of EXAMPLE 24A (120 mg, 0.25 mmol) in dioxane (8 mL) and water (2 mL) was added phenylboronic acid (36 mg, 0.30 mmol), 1 , 1 '- bis(diphenylphosphino)ferrocene]dichloropalladium(II) (18 mg, 0.025 mmol) and potassium carbonate (102 mg, 0.71 mmol) and the mixture was stirred at 100°C for 3 hours. After cooling to ambient temperature, the mixture was extracted with ethyl acetate (3 * 50 mL). The combined organic phase was dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel (200-300 mesh) 50/1 eluting with dichlomethane /methanol to give the title compound. MS: 529 (M + H+).
EXAMPLE 4 IB
5-{[2-methoxy-4-(piperazin-l-yl)phenyl]amino}-7-phenylpyrido[3,4-d]pyridazin-4(3H)-one
To a solution of EXAMPLE 41 A (120 mg, 0.23 mmol) in dichloromethane (10 mL) was added 2,2,2-trifluoroacetic acid (4 mL) and the mixture was stirred at ambient temperature for 3 hours. After concentration, the residue was purified by preparative HPLC eluting with a gradient of 10/90 to 30/20 acetonitrile/water (containing 0.1 % trifluoroacetic acid) to give the title compound as a solid trifluoroacetate salt. Ή NMR (DMSO-<¾. 300 ΜΗζ): δ 12.9 (s. 1 H), 1 1.5 (s, 1 H). 8.72 - 8.69 (m, 3 H), 8.30 (s, 1 H). 8. 14 (d. J = 6.6 Hz, 2 H). 7.60 -7.55 (m. 4 H). 6.79 (d, J = 2.1 Hz. 1 H), 6.67 (dd, J = 9.0 Hz. 2. 1 Hz. 1 H). 3.93 (s. 3 H), 3.37 (brs, 4 H), 3.27 (brs, 4 H). MS : 429.2 (M + H+).
EXAMPLE 42
7-(2,6-dichlorobenzyl)-5-{ [2,6-difluoro-4-( iperazin-l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 42A
4-bromo-2,6-difluorobenzenamine
2,6-Difluorobenzeneamine (6.0 g, 45 mmol) was dissolved in acetic acid (20 mL) and bromine (2.4 mL, 50 mmol) was added and the mixture was stirred at ambient temperature for 15 minutes. After concentration, the residue was treated with aqueous sodium carbonate and extracted with ethyl acetate. The organic extract was dried over sodium sulfate, filtered, and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 25/1 petroleum ether/ethyl acetate to give the title compound. MS: 208 (M+H+).
EXAMPLE 42B
N,iV-dibenzyl-4-bromo-2,6-difluorobenzenamine A mixture of EXAMPLE 42A (1.1 g, 5.3 mmol), benzyl bromide (949 mg. 0.66 ml) and potassium bicarbonate (1 .46 mg, 10.6 mmol) in N/V-dimethylformamide (3 mL) was stirred at ambient temperature until TLC indicated no starting material remained. Ethyl acetate was added, and the mixture was washed with water and brine and dried over anhydrous sodium sulfate. After filtration and concentration of the filtrate, the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 10/1 petroleum ether/dichoromethane to give the title compound.
EXAMPLE 42C
tert-buty 1 4-(4-(dibenzy lamino)-3 ,5-difluoropheny l)piperazine- 1 -carboxy late A mixture of EXAMPLE 42B (490 mg, 1.3 mmol), ier/-butyl piperazine- 1 - carboxylate (258 mg, 1.4 mmol), palladium diacetate (14 mg, 0.06 mmol), (±)-2,2'- bis(diphenylphosphino)-l , l'-binaphthalene (59 mg, 0.09 mmol) and cesium carbonate (848 mg, 2.6 mmol) in 1 ,4-dioxane (20 mL) was heated at reflux for 16 hours. The mixture was filtered through diatomaceous earth and the filtrate was concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 8/1 petroleum ether/ethyl acetate to give the title compound. EXAMPLE 42D
/err-butyl 4-(4-amino-3,5-difluorophenyl)piperazine-l -carboxylate A mixture of EXAMPLE 42C (560 mg, 1.1 mmol) and 10% palladium on carbon in methanol ( 15 mL) was stirred at ambient temperature under hydrogen until TLC indicated no starting material remained. The mixture was filtered through diatomaceous earth and the filtrate was concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 4/1 petroleum ether/ethyl acetate to give the title compound. MS: 314 (M+rf).
EXAMPLE 42E
/er/-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyridof3,4-i ]pyridazin-5-ylamino)-3,5- difluorophenyl)piperazine-l -carboxylate
The title compound was obtained following the procedure described in EXAMPLE 26C, using EXAMPLE 42D in place of EXAMPLE 26B. MS: 493 (M + H+).
EXAMPLE 42F
r/-butyl 4-(4-(7-(2,6-dichlorobenzyl)-4-oxo-3,4-dihydropyrido[3,4-i ]pyridazin-5-y lamino)-
3 ,5 -difluoropheny l)piperazine- 1 -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 26D, using EXAMPLE 42E in place of EXAMPLE 26C. MS: 617 (M + r ).
EXAMPLE 42G
7-(2,6-dichlorobenzyl)-5-{ [2.6-difluoro-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 26E, using EXAMPLE 42F in place of EXAMPLE 26D. Ή NMR (DMSO-<¾ 300 MHz): δ 12.97 (s. 1 H), 9.98 (s, 1 H), 8.78 (brs, 2 H), 8.25 (s, 1 H), 7.43 - 7.34 (m, 3 H), 6.74 - 6.68 (m, 3 H), 4.25 (s, 2 H), 3.44 - 3.27 (m, 8 H). MS: 517 (M + if).
EXAMPLE 43
5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}-7-(pyridin-2-ylamino)pyrido[3,4- d]py ridazin-4(3 H)-one
EXAMPLE 43A
tert-but ] 4-(3-methoxy-4-(4-oxo-7-(pyridin-2-ylamino)-3,4-dihydropyrido[3,4-i/|pyridazin-
5 -y lamino)pheny l)piperazine- 1 -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 31 A, using 2-aminopyridine in place of 3,5-dichloro benzenamine. MS: 545 (M + H+).
EXAMPLE 43B 5 - { [2-me thoxy -4-( iperazin - 1 -v l)pheny ^ ^
d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 20F, using EXAMPLE 43 A in place of EXAMPLE 20E. Ή NMR (DMSO-cfe 300 MHz,): δ 12.46 (s, 1 H), 1 1.37 (s, 1 H), 10.07 (brs, 1 H), 8.70 (brs, 2 H), 8.45 - 8.28 (m, 2 H), 8.1 1 (s, 1 H), 7.72 - 7.58 (m, 2 H), 7.18 (s, 1 H), 7.03 - 6.98 (m. 1 H), 6.76 (s, 1 H), 6.57 (d, J = 1 1.1 Hz, 1 H), 3.89 (s, 3 H), 3.35 (brs, 4 H), 3.28 (brs, 4 H). MS: 445 (M + H4).
EXAMPLE 44
5-{ [2-methoxy-4-(piperazin- l -yl)phenyl]amino}-7-(pyridin-3-y larnino)pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 44A
ieri-butyl 4-(3-methoxy-4-(4-oxo-7-(pyridin-3-ylamino)-3,4-dihydropyrido[3 ,4-c ]pyridazin- 5 -y lamino)pheny l)piperazine- 1 -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 31 A, using 3-aminopyridine in place of 3,5-dichloro benzenamine. MS: 545 (M + H+).
EXAMPLE 44B
5-{ [2-methoxy -4-(piperazin-l -yl)phenyl]amino}-7-(pyridin-3-ylamino)pyrido[3,4- d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 20F, using EXAMPLE 44A in place of EXAMPLE 20E. Ή NMR (DMSO-a^. 300 MHz,): δ 12.39 (s, 1 H), 1 1.31 (s, 1 H), 9.84 (s, 1 H), 8.76 - 8.72 (m, 3 H), 8.30 - 8.04 (m, 4 H), 7.45 (brs, 1 H), 6.74 (d, J = 2.1 Hz, 1 H), 6.49 - 6.46 (m, 1 H), 6.28 (s, 1 H), 3.87 (s, 3 H), 3.35 (brs,4 H), 3.28 (brs, 4 H). MS: 445 (M + H+).
EXAMPLE 45
7-{ [2-(dimethylamino)ethyl]amino }-5-{ [2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one
EXAMPLE 45A
ieri-butyl 4-(4-(7-(2-(dimethylamino)ethylamino)-4-oxo-3,4-dihydropyrido[3,4-i/] pyridazin- 5-ylamino)-3-methoxyphenyl)piperazine-l -carboxy late A solution of EXAMPLE 24A (120 mg, 0.25 mmol), N' N1- dimethylethane-1 ,2- diamine (66 mg, 0.75 mmol) and N,N-diisopropylethylamine (0.5 mL) in 1 ,4-dioxane ( 10 mL) was heated in a sealed tube at 130°C for 48 hours. After concentration, the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 5/1
dichloromethane/methanol to give the title compound. MS: 539 (M + H+). EXAMPLE 45B
7- { [2-(dimethy lamino)ethy l]amino }-5 - { [2-methoxy-4-(piperazin- 1 - y l)pheny l]amino }py rido [3 ,4-d]py ridazin-4(3 H)-one The title compound was obtained following the procedure described in EXAMPLE 37B. using EXAMPLE 45 A in place of EXAMPLE 37A. Ή NMR (DMSO-tAj, 300 MHz): δ 12. 19 (s. 1 H). 1 1 49 (s. 1 H). 9.61 (brs. 1 H), 8.81 (brs, 2 H), 8.42 (d, .7 = 9 Hz. 1 H). 7.97 (s. 1 H), 7. 1 (brs, 1 H). 6.76 (d../ = 2. 1 Hz, 1 H), 6.57 (dd..1 = 9 Hz, 2.1 Hz. 1 H), 5.97 (s. 1 H). 3.90 (s, 3 H), 3.70 (m, 2 H), 3.31 (m, 10 H), 2.84 (s, 3 H), 2.82 (s, 3 H). MS: 439 (M + H+).
EXAMPLE 46
7-(cyclohexylamino)-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 46A
tert-butyl 4-(4-(7-(cyclohexylamino)-4-oxo-3,4-dihydropyrido[3,4-i/]pyridazin-5-ylamino)-3- methoxy phenv l)piperazine- 1 -carboxy late
A solution of EXAMPLE 24A ( 120 mg, 0.25 mmol), cyclohexanamine (74 mg, 0.75 mmol) and jVN-diisopropylethylamine (0.5 mL) in 1.4-dioxane ( 10 mL) was heated in a sealed tube at 130°C for 48 hours. The mixture was concentrated to provide the crude title compound which was used in the next reaction without further purification. MS: 550 (M + H+).
EXAMPLE 46B
7-(cyclohexylamino)-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
The title compound was obtained as following the procedure described in EXAMPLE 37B, using EXAMPLE 46A in place of EXAMPLE 37A. Ή NMR (DMSO-rf«. 300 MHz,): δ 12.00 (s, 1 H), 1 1.50 (s, 1 H), 8.70 (brs, 2 H). 8.62 (d, J = 9 Hz, 1 H), 7.87 (s. 1 H), 7.34 (brs, 1 H), 6.75 (d, 1 H), 6.52 (d, J = 9 Hz, 1 H), 5.88 (s, 1 H), 3.91 (s, 3 H), 3.78 (m, 1 H), 3.3 1 (m, 8 H), 1.21 - 2.04 (m, 10 H). MS: 449 (M + H+).
EXAMPLE 47
5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}-7-{ [2-(pyridin-2- yl)ethyl]amino}pyrido[3,4-d]pyridazin-4-ol
EXAMPLE 47A
fc 7-butyl 4-(3-methoxy-4-(4-oxo-7-(2-(pyridin-2-yl)ethylamino)-3,4-dihydropyrido[3,4- i/]pyridazin-5-ylamino)phenyl)piperazine- 1 -carboxy late The tide compound was obtained following the procedure described in EXAMPLE 39A, using 2-(pyridin-2-yl)ethanamine in place of piperidine. MS: 573 (M + H+).
EXAMPLE 47B
5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}-7-{ [2-(pyridin-2- y l)ethy 1 ]amino } py rido [ 3 ,4-d] py ridazin-4-ol
The title compound was obtained following the procedure described in EXAMPLE 26E. using EXAMPLE 47A in place of EXAMPLE 26D. Ή NMR (DMSO-efe. 300 MHz): δ 12.08 (s, 1 H), 1 1.41 (s, 1 H), 8.78 - 8.54 (m. 4 H), 8.06 (br, 1 H). 7.91 (s. 1 H). 7.57 (br. 2 H), 6.76-6.75 (m, 1 H), 6.48 - 6.44 (m. 1 H). 5.90 (s. 1 H). 3.91 (s, 3 H). 3.78 (br, 2 H), 3.32 (b, 8 H), 3.21 - 3.17 (m, 2 H). MS: 473 (M + If).
EXAMPLE 48
7-[(2-fluorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 48A
tert-butyl 4-(4-(7-(2-fluorophenylamino)-4-oxo-3,4-dihydropyrido[3,4-d]pyrid azin-5- y lamino)-3-methoxypheny l)piperazine- 1 -carboxy late The title compound was obtained following the procedure described in EXAMPLE 10A, using 2-fluoroaniline in place of 2,6-dichlorobenzenamine.
EXAMPLE 48B
7-[(2-fluorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 2F, using EXAMPLE 48A in place of EXAMPLE 2E. Ή NMR (DMSO-*, 300 MHz): δ 12.30 (s, 1 H). 1 1.45 (s, 1 H), 9.28 (s, 1 H), 8.78 (s, 2 H), 8. 16 (d. J = 9 Hz, 1 H), 7.80 (s. 1 H), 7.72-7.69 (m, 1 H), 7.38-7.30 (m, 1 H), 7.23-7.20 (m, 2 H), 6.70 (s, 1 H), 6.30-6.24 (m, 2 H), 3.88 (s, 3 H), 3.34-3.25 (m, 8 H). MS: 462 (M+H+).
EXAMPLE 49
7-[(2,6-dimethylphenyl)amino]-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 49A
te/Y-butyl 4-(4-(7-(2,6-dimethylphenylamino)-4-oxo-3,4-dihydropyrido[3,4-(/]pyridazin-5- y lamino)-3-methoxypheny l)piperazine- 1 -carboxy late The title compound was obtained following the procedure described in EXAMPLE 3 1 A, using 2,6-dimethylaniline in place of 3,5-dichloro benzenamine. MS: 572 (M+H+).
- I l l - EXAMPLE 49B
7-[(2,6-dimethylphenyl)ammo]-5-{ [2-metto
d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 20F, using EXAMPLE 49 A in place of EXAMPLE 20E. Ή NMR (DMSO-<¾ 300 MHz): δ 12.15 (s, 1 H), 1 1.48 (s, 1 H), 8.85 - 8.68 (m, 4 H), 7.98 (s, 1 H), 7.21 (brs, 4 H), 6.67 (s, 1 H), 3.87 (s, 3 H), 3.38 (brs, 8 H), 2.1 (s, 6 H). MS: 472 (M+H+).
EXAMPLE 50
7-[(3-chloropyridin-2-yl)amino]-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,^ d)pyridazin-4(3H)-one
EXAMPLE 50A
tert-butyl 4-(4-(7-(3-chloropyridin-2-ylamino)-4-oxo-3.4-dihydropyrido[3.4-i ] pyridazin-5- y lamino)-3-methoxy pheny l)piperazine- 1 -carboxy late The title compound was obtained following the procedure described in EXAMPLE 37A, using 3-chloropyridin-2-amine in place of 2,3-difluorobenzenamine. MS: 579 (M +
H+).
EXAMPLE 50B
7-[(3-chloropyridin-2-yl)amino]-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 37B. using EXAMPLE 50A in place of EXAMPLE 37A. Ή NMR (DMSO-c/e, 300 MHz) : δ 12.55 (s, 1 H), 11.55 (s, 1 H), 9.04 (s, 1 H), 8.70 (br, 2 H), 8.48 (d, J = 9 Hz, 1 H), 8.42 (m, 1 H), 8.16 (s, 1 H), 8.05 (d, J = 9 Hz, 1 H), 7.23 (m, 1 H), 7.13 (s, 1 H), 6.73 (s. 1 H), 6.43 (m. 1 H), 3.91 (s, 3 H), 3.34 (m, 8 H). MS: 479 (M + H+).
EXAMPLE 51
7-f(2,3-dichlorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 5 1A
feri-butyl 4-(4-(7-(2,3-dichlorophenylamino)-4-oxo-3,4-dihydropyrido[3,4-i |pyridazin-5- y lamino)-3 -methoxy pheny l)piperazine- 1 -carboxy late The title compound was obtained following the procedure described in EXAMPLE 37A, using 2,3-dichIoroaniIine in place of 2,3-difluorobenzenamine. MS : 612 (M + H+).
EXAMPLE 5 IB 7-[(2,3-dichlorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 37B, using EXAMPLE 51 A in place of EXAMPLE 37A. Ή NMR (OMSO-d , 300 MHz): δ 12.35 (s, 1 H), 1 1.48 (s, 1 H), 9.34 (s, 1 H), 8.70 (br, 2 H), 8.06 (s, 1 H), 8.02 (d, J = 8.7 Hz, 1 H), 7.66 (d, J = 7.8 Hz, 1 H), 7.54 (d, ./ = 7.8 Hz, 1 H), 7.42 (t, J = 7.8 Hz, 1 H), 6.70 (d, J = 2.4 Hz, 1 H), 6.29 (s, 1 H), 6.23 (dd, J = 8.7 Hz, 1 H), 3.88 (s, 3 H), 3.29 (m, 8 H). MS: 512 (M + H+).
EXfAMPLE 52
5-{ [2-metlioxy-4-(piperazin-l -yl)phenyl]amino}-7-[(2.4,6-rTifluorophenyl)amino]pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 52A
/erf-butyl 4-(3-methoxy-4-(4-oxo-7-(2.4,6-trifluorophenylamino)-3.4-dihydropyrido-[3,4- c/]pyridazin-5-ylamino)phenyl)piperazine- l-carboxylate The title compound was obtained following the procedure described in EXAMPLE
24B, using in 2,4,6-trifluooaniline place of 2-chlorobenzenamine. MS: 598 (M + H ).
EXAMPLE 52B
5-{[2-methoxy-4-( iperazin-l -yl)phenyl]amino}-7-[(2.4,6-trifluorophenyI)amino]pyrido[3,4- d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE
28B, using EXAMPLE 52A in place of EXAMPLE 28A. Ή NMR (DMSO-rfe, 300 MHz): δ 8.00 - 7.97 (d, J = 8.7 Hz, 1 H), 7.92 (s, 1 H), 7.05 - 6.99 (m, 2 H), 6.67 (d, J = 2.7 Hz. 1 H), 6.21 (dd, J = 9.0 Hz, 3.0 Hz, 1 H), 6. 13 (s, 1 H), 3.92 (s, 3 H), 3.36 - 3.34 (m, 8 H). MS: 498 (M + H+).
EXAMPLE 53
5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}-7-[(2,3,4-trifluorophenyl)amino]pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 53A
tert-butyl 4-(3-methoxy-4-(4-oxo-7-(2,3,4-trifluoropheny lamino)-3,4-dihydro pyrido[3.4- d]pyridazin-5-ylamino)phenyl)piperazine-l -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 10A, using 2,3,4-trifluoroaniline in place of 2,6-dichlorobenzenamine.
EXAMPLE 53B 5-{ [2-methox -4-^iperazin-l -yl)phenyl]amino}-7-[(2,3,4-ta
d]pyridazin-4(3H)-one
The tide compound was obtained following the procedure described in 2F, using EXAMPLE 53A in place of EXAMPLE 2E. Ή NMR (DMS0-< 300 MHz): δ 12.36 (s, 1 H). 1 1.42 (s, 1 H), 9.41 (s, 1 H), 8.66 (s, 2 H), 8.07 (s, 1 H), 7.98 (d, J = 9 Hz, 1 H), 7.46-7.30 (m, 2 H), 6.72 (s. 1 H), 6.25 (s, 2 H). 3.89 (s, 3 H), 3.39 (s, 8 H). MS: 498 (M+H+).
EXAMPLE 54
7-[(3 -chloro-2-fluoropheny l)amino]-5- { [2-methoxy -4-(piperazin- 1 - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol
EXAMPLE 54A
feri-butyl 4-(4-(7-(3-chloro-2-fluorophenylarnino)-4-oxo-3,4-dihydropyrido[3,4-i/]pyridazin- 5-ylamino)-3-methoxyphenyl)piperazine-l -carboxylate The title compound was obtained following the procedure described in EXAMPLE 24B, using 2-fiuoro-3-chloroaniline in place of 2-chlorobenzenamine. MS: 596 (M + H ).
EXAMPLE 54B
7-[(3-chloro-2-fluorophenyl)amino]-5-{ [2-methoxy -4-(piperazin- 1 - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol The title compound was obtained following the procedure described in EXAMPLE 26E, using EXAMPLE 54A in place of EXAMPLE 26D. Ή NMR (DMSO-< , 300 MHz): δ 12.24 (s, l H), 1 1.41 (s, 1 H), 9.28 (s, 1 H), 8.65 (brs, 2 H), 8.05 - 8.03 (m, 2 H), 7.69 - 7.64 (m, 1 H), 7.38 (br, 1 H), 7.24 - 7.18 (m, 1 H), 6.71 (s, 1 H), 6.30 (brs, 2 H), 3.89 (s, 3 H), 3.33 (brs, 8 H). MS: 496 (M + H+).
EXAMPLE 55
5-{ [2-methoxy -4-(piperazin- l -y l)phenyl]amino}-7-(tetrahydro-2H-pyran-4- ylamino)pyrido[3,4-d]pyridazin-4-ol
EXAMPLE 55A
ieri-butyl 4-(3-methoxy-4-(4-oxo-7-(tetrahydro-2H-pyran-4-ylamino)-3,4-dihydropyrido[3,4- i/]pyridazin-5-y lamino)phenyl)piperazine- 1 -carboxylate The title compound was obtained following the procedure described in EXAMPLE 34A, using tetrahydro-2H-pyran-4-amine in place of 2,4-dichlorobenzenamine. MS: 552 (M
+ H+).
EXAMPLE 55B
5-{ [2-methoxy -4-(piperazin- l -y l)phenyl]amino} -7-(tetrahydro-2H-py ran -4- ylamino)pyrido[3,4-d]pyridazin-4-ol The title compound was obtained following the procedure described in EXAMPLE 34B, using EXAMPLE 55 A in place of EXAMPLE 34A. Ή NMR (CD3OD, 300 MHz): δ 8.63 (d, J = 9 Hz, 1 H), 7.82 (s, 1 H), 6.77 (d, J = 2.4 Hz, 1 H), 6.63 (m, 1 H), 5.91 (s, 1 H), 3.68 (m, 6 H), 3.61 (t, 2 H), 3.43 (m. 8 H), 2.10 (m, 2 H). 2.06 (m, 2 H). MS: 452 (M + Yf).
EXAMPLE 56
5-{ [2-methoxy-4-(piperazin- l -yl)phenyl]amino}-7-( l ,3-thiazol-2-ylamino)pyrido[3.4- d]pyridazin-4(3H)-one
EXAMPLE 56A
tert-butyl4-(3-methoxy-4-(4-oxo-7-(thiazol-2-ylamino)-3,4-dihydropyrido[3,4-c/]pyridazin-5- y lamino)phenyl)piperazine- 1 -carboxylate
A mixture of EXAMPLE 24A (150 mg, 0.31 mmol), 2-aminothiazole (37 mg, 0.37 mmol), dimethylbisdiphenylphosphinoxanthene (36 mg, 0.62 mmol),
tris(dibenzylideneacetone) dipal ladium (28 mg, 0.03 mmol) and potassium tert-butoxide (69 mg, 0.68 mmol) in tert-butoxide (20 ml) was heated at 120"C for 14 hours under nitrogen. After cooling to ambient temperature, the mixture w as filtered and purified by flash chromatography on silica gel (200-300 mesh) eluting with 5/1 petroleum ether/ethy l acetate to provide the title compound. MS: 551 (M + H+).
EXAMPLE 56B
5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}-7-(l,3-thiazol-2-ylamino)pyrido[3,4- d]pyridazin-4(3H)-one
To a solution of EXAMPLE 56A (80 mg, 0.15 mmol) in dichloromethane (20 ml) was added 2,2,2-trifluoroacetic acid (6 mL) and the mixture was stirred at ambient temperature for 6 hours. The mixture was concentrated and the residue purified by preparative HPLC using a gradient of 10/90 to 80/20 acetronitrile in water (containing 0.1 % trifluoroacetic acid) to give the title compound. Ή NMR (OMSO-d6, 300 MHz): δ 12.52 (s, 1 H). 1 1 .48 (s, 1 H), 1 1.06 (s, 1 H), 8.72 ( br, 1 H), 8. 13 ( s, 1 H), 7.93 - 7.90 (d, = 8.4 Hz, 1 H), 7.41 - 7.40 (d, J = 3.3 Hz, 1 H), 6.96 - 6.95 (d, J = 3.3 Hz, 1 H), 6.77 ( s, 1 H), 6.63 - 6.60 ( m, 2 H), 3.84 ( s, 3 H ), 3.40 - 3.31 ( m, 8 H ). MS^ l M+H*)
EXAMPLE 57
5-{ [2-chloro-4-(piperazin- l -yl)phenyl]amino}-7-(2,6-dichlorobenzyl)pyrido[3,4-d]pyridazin-
4(3H)-one
EXAMPLE 57A
/V,/V-bis(fcr/-butoxycarbonyl)-4-bromo-2-chloroaniline A mixture of 4-bromo-2-chloroaniline (10 g, 48.4 mmol), di-ieri-butyl dicarbonate (12.68 g, 58.12 mmol) and potassium carbonate (20.07 g, 145 mmol) in dimethylacetamide (300 mL) was stirred at ambient temperature for 24 hours. The mixture was poured into water and extracted with ethyl acetate (3 x 100 mL). The combined organic layers were dried over sodium sulfate, filtered, and concentrated and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 10/1 petroleum ether/ethyl acetate to give the title compound. MS : 428 (M + Na+).
EXAMPLE 57B
tert-buty 1 4-(4-(bis(tert-butoxy carbony l)amino)-3 -chloropheny l)piperazine- 1 -carboxy late A mixture of EXAMPLE 57A (280 g, 0.9 mmol), ferZ-butyl piperazine-1 -carboxy late
(205 mg, 1.09 mmol), palladium acetate (21 mg, 0.092 mmol), (±)-2,2'- bis(diphenylphosphino)-l ,l '-binaphthalene (86 mg, 0.14 mmol) and cesium carbonate (900 mg, 2.76 mmol) in toluene (10 mL) was heated under nitrogen at 100°C for 16 hours. After cooling to ambient temperature, the mixture was concentrated. The residue was diluted with dichloromethane (300 mL), washed with water and brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 5/1 petroleum ether/ethyl acetate to give the title compound.
EXAMPLE 57C
2-chloro-4-(piperazin-l -yl)aniline
To a solution of EXAMPLE 57B (320 mg, 0.63 mmol) in dichloromethane (4 mL) was added trifluoroacetic acid (1 mL) dropwise and the mixture was stirred at ambient temperature for 4 hours. The mixture was concentrated and the crude title compound was used in the next step without further purification. MS: 212 (M + H+).
EXAMPLE 57D
ieri-butyl 4-(4-amino-3-chlorophenyl)piperazine- l -carboxy late
A mixture of EXAMPLE 57C (133 mg, 0.63 mmol). di-/er/-butyl dicarbonate (173 mg. 0.79 mmol) and potassium carbonate (546 mg, 3.95 mmol) in dimethylacetamide (5 mL) was stirred at ambient temperature for 1 hour. The mixture was poured into water and extracted with ethyl acetate (3 x 50 mL). The combined organic layers were dried over sodium sulfate, filtered, and concentrated and the residue was purified by flash
chromatography on silica gel (200-300 mesh) eluting with 3/1 petroleum ether/ethyl acetate to give the title compound. MS: 312 (M + ¥f).
EXAMPLE 57E /eri-butyl 4-(3-chloro-4-(7-chloro-4-oxo-3,4-dihydropyrido[3.4-c ]pyridazin-5- ylamino)phenyl)piperazine- l -carboxylate
A mixture of EXAMPLE 57D (95 mg. 0.3 mmol). EXAMPLE 7K (66 mg. 0.3 mmol) and NN-diisopropylethylamine (79 mg. 0.6 mmol) in 1 ,4-dioxane (2 mL) was heated in a sealed tube at 120°C for 18 hours. The mixture was concentrated and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 3/1 petroleum ether/ethyl acetate to give the title compound. MS: 491 (M + H+).
EXAMPLE 57F
r nityl 4-(3-chloro-4-(7-(2.6-dichlorobenzyl)-4-oxo-3.4-dihydropyrido[3,4-c/]pyridazin-5- y lamino)pheny piperazine- 1 -carboxy late
To a mixture of EXAMPLE 57E (147 mg, 0.3 mmol) and
tetrakis(triphenylphosphine) palladium (40 mg, 0.03 mmol) was added 0.5M 2,6- dichlorobenzyl zinc bromide in tetrahydrofuran (4 mL, 2 mmol) under nitrogen and the mixture was heated at 60°C for 16 hours. After cooling to ambient temperature, the mixture was diluted with dichloromethane (50 mL) and washed with saturated aqueous sodium bicarbonate. The organic phase was separated and the aqueous phase was extracted with dichloromethane (2 x 20 mL). The combined organic phase was washed with brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 98/2 dichloromethane/methanol to give the title compound. MS: 615 (M + H+).
EXAMPLE 57G
5-{ [2-chloro-4-(piperazin-l -yl)pheny l]amino}-7-(2,6-dichlorobenz\ l)pyrido[3.4-d]pyridazin-
4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 28B, using EXAMPLE 57F in place of EXAMPLE 28A. Ή NMR (DMSO-i «, 300 MHz): δ 13.02 (s, 1 H), 1 1.58 (s, 1 H), 8.80 (br, 2 H), 8.31 (s, 1 H), 8.16 (d, J = 9.3 Hz, 1 H), 7.61 (d, J = 8. 1 Hz, 2 H), 7.47 - 7.41 (m, 1 H), 7.13 (d, J = 2.4 Hz, 1 H), 6.99 (s, 1 H), 6.70 (dd, J = 9.0 Hz, 2.4 Hz, 1 H), 4.50 (s, 3 H), 3.36 - 3.28 (m, 8 H). MS: 515 (M + H+).
EXAMPLE 58
5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}-7-l( l-methylpiperidin-4- y i)amino]pyrido [3 ,4-d]py ridazin-4(3 H)-one
EXAMPLE 58A
ier/-butyl 4-(3-methoxy-4-(7-(l -methylpiperidin-4-ylamino)-4-oxo-3,4-dihydropyrido [3,4- i/]pyridazin-5-y lamino)pheny Opiperazine- 1 -carboxy late The title compound was obtained following the procedure described in EXAMPLE 37A, using l-methylpiperidin-4-amine in place of 2,3-difluorobenzenamine. MS: 565 (M +
H+).
EXAMPLE 58B
5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}-7-[( l -methylpiperidin-4- yI)amino]pyrido[3.4-d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 37B, using EXAMPLE 58A in place of EXAMPLE 37A. Ή NMR (DMSO-ck, 300 MHz): δ 12.12 (s, 1 H), 11.55 (s, 1 H), 9.47 (br, 1 H), 8.79 (br, 2 H), 8.53 (m, 1 H), 7.92 (s, 1 H), 7.52 (br, 1 H). 6.77 (d, 1 H), 6.65 (d. = 9 Hz, 1 H), 5.92 (s, 1 H), 3.91 (s, 3 H), 3.57 (d, 2 H). 3.32 (m, 8 H), 3.12 (q, 2 H), 2.85 (m, 3 H), 2.28 (d, 2 H), 2.06 (m, 1 H), 1.70 (q, 2 H). MS: 465 (M + H*).
EXAMPLE 59
7-(2,6-dichlorobenzyl)-5-{ [3-fluoro-2-methoxy-4-(piperazin- l-y l)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
EXAMPLE 59A
3-fluoro-2-methoxy-4-(piperazin-l -yl)aniline
The title compound was obtained following the procedure described in EXAMPLE I F and 1 G using l ,2-difluoro-3-methoxy-4-nitrobenzene in place of 4-fluoro-2-methoxy-l - nitrobenzene.
EXAMPLE 59B
ier/-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-of|pyridazin-5-ylamino)-2-fluoro-3- methoxyphenyl)piperazine-l -carboxylate
The title compound was obtained following the procedure described in EXAMPLE 24A, using EXAMPLE 59A in place of EXAMPLE 1 G. MS: 505 (M + H+).
EXAMPLE 59C
/eri-butyl 4-(4-(7-(2,6-dichlorobenzyl)-4-oxo-3,4-dihydropyrido[3,4-( lpyridazin-5-ylamino)- 2-fluoro-3-methoxypheny l)piperazine- 1 -carboxylate The title compound was obtained following the procedure described in EXAMPLE 26D, using EXAMPLE 59B in place of EXAMPLE 26C. MS: 630 (M * H
EXAMPLE 59D
7-(2,6-dichlorobenzy l)-5- { [3 -fluoro-2-methoxy -4-(piperazin- 1 -y l)pheny l]amino } py rido [3 ,4- d]pyridazin-4-ol
The title compound was obtained following the procedure described in EXAMPLE 34B. using EXAMPLE 59C in place of EXAMPLE 34A. Ή NMR (DMSO-d,,, 300 MHz): δ 13.03 (s, 1 H), 11.79 (s, 1 H), 7.89 (br, 2 H), 8.31 (s, 1 H), 7.78 (d, J = 9.3 Hz, 1 H). 7.62 (d, J = 8.1 Hz, 1 H), 7.45 (m, 1 H), 6.98 (s, 1 H), 6.52 (m, 1 H), 4.53 (s, 2 H), 3.95 (s, 3 H), 3.30 (m, 4 H), 3.19 (m, 4 H). MS: 529.1 (M + H").
EXAMPLE 60
7-[(3-chloropyridin-4-yl)amino]-5-{[2-metlioxy-4-(piperazin-l -yl)phenyl]amino}pyrid d]pyridazin-4(3H)-one
EXAMPLE 60A
tert-butyl 4-(4-(7-(3 hloropyridin-4-ylamino)-4-oxo-3,4-dihydropyrido|3,4-i ]pyridazin-5- ylamino)-3-methoxyphenyl)piperazine- l -carboxylate A mixture of EXAMPLE 24A (160 mg, 0.33 mmol), 3-chloropyridin-4-amine (65 mg, 0.45 mmol), tris(dibenzylideneacetone)dipalladium (30 mg, 0.03 mmol),
dimethylbisdiphenyl phosphinoxanthene (20 mg, 0.03 mmol), potassium r/-butoxide (1 12 mg, 1 mmol) and /erf-butanol (2 mL) was bubbled with nitrogen and heated at 100°C for 18 hours. The mixture was concentrated and the residue was dissolved in dichloromethane, washed with saturated aqueous sodium bicarbonate and brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 98/2 dichloromethane/methanol to give the title compound. MS : 579 (M + H+).
EXAMPLE 60B
7-[(3-chloropyridin-4-yl)amino]-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
To a solution of EXAMPLE 60A (100 mg, 0. 16 mmol) in dichloromethane (10 mL) was added 2,2,2-trifluoroacetic acid (2 mL) dropwise. The solution was stirred at ambient temperature for 12 hours, concentrated and purified by preparative HPLC using a gradient of 1 /90 to 80/20 acetronitrile in water (containing 0.1 % trifluoroacetic acid) to give the title compound. Ή NMR (DMSO-c «, 300 MHz): δ 12.62 (s, 1 H), 1 1.34 (s, 1 H), 8.46 (s, 1 H). 8.73 (br, 2 H), 8.64 (s, 1 H), 8.33 - 8.31 (m, 1 H), 8. 16 - 8.13 (m, 2 H), 8.04 - 8.01 (m, 2 H), 6.76 - 6.74 (m, 2 H), 6.48 - 6.45 (m, 1 H), 3.89 (s, 3 H), 3.36 - 3.29 (m. 8 H). MS: 479 (M +
EXAMPLE 61
5-{ f2-bromo-4-(piperazin-l -yl)phenyl]amino}-7-(2,6-dichlorobenzyl)pyrido[3,4-d]pyridazin-
4(3H)-one
EXAMPLE 61 A 3-fluoro-2-methoxy-4-(piperazin-l -yl)aniline
The title compound was obtained following the procedure described in EXAMPLE 1 F and 1 G using 2-bromo-4-fluoro-l -nitrobenzene in place of 4-fluoro-2-methoxy- l - nitrobenzene.
EXAMPLE 61B
tert-butyl 4-(3-bromo-4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-d]pyridazin-5- y lamino)pheny l)piperazine- 1 -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 24A, using EXAMPLE 61 A in place of EXAMPLE 1G.
EXAMPLE 61C
tert-butyl 4-(3-bromo-4-(7-(2,6-dichlorobenzyl)-4-oxo-3,4-dihydropyrido[3,4-d] pyridazin-5- y lamino)pheny l)piperazine- 1 -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 2E, using EXAMPLE 6 I B in place of EXAMPLE 2D.
EXAMPLE 61 D
5-{ l2-bromo-4-(piperazin-l -yl)phenyl]amino}-7-(2,6-dichlorobenzyl)pyrido[3,4-d]pyridazin-
4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 2F, using EXAMPLE 61C in place of EXAMPLE 2E. Ή NMR(DMSO-c , 300 MHz): δ 12.96 (s, 1 H), 1 1.40 (s, 1 H), 8.69 (s, 1 H), 8.26 (s, 1 H), 8.05 (d, = 9 Hz, 1 H), 7.56 (d, J = 7.8 Hz, 2 H), 7.40 (m, 1 H), 7.22 (s, 1 H), 6.93 (s, 1 H), 6.70 (dd, J =2.7 Hz, 9 Hz, 1 H), 4.5(s, 2 H), 3.31 -3.20 (m, 8 H). MS: 561 (M+H+).
EXAMPLE 62
7-(2-chlorophenoxy)-5-{[2-methoxy-4-(piperazin- l -yl)phenyl]amino}pyrido[3,4- d]py ridazin -4(3 H)-one
EXAMPLE 62A
tert-butyl 4-(4-(7-(2-chlorophenoxy)-4-oxo-3,4-dihydropyrido[3,4-d]pyridazin- 5-ylamino)- 3 -methoxy pheny l)piperazine- 1 -carboxy late
A mixture of EXAMPLE 24 A (0.1 g, 0.21 mmol), 2-chlorophenol (53 mg, 0.42 mmol), cuprous iodtde (4 mg, .O2 mmol), 2-(diiiielliylamino)acetic acid (6 mg, 0.06 mmol) and cesium carbonate (0.14 g, 0.42 mmol) in 1 ,4-dioxane (2 mL) was heated in a sealed tube at 120°C overnight. After concentration, the residue was purified by flash chromatography on silica gel eluting with 1/100 methanol/dichloromethane to give the title compound.
EXAMPLE 62B 7-(2-ch]orophenox )-5-{[2-methoxy-4-(piperazin- l -y])phenyl]amino}pyrido[3^
d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 2F, using EXAMPLE 62 A in place of EXAMPLE 2E. Ή NMR (DMSO-i , 300 MHz): δ 12.74 (s, 1 H), 1 1.54 (s, 1 H), 8.56 (s, 2 H), 8.21 (s, 1 H), 7.67 (d, J = 8.1 Hz, 1 H), 7.50-7.41 (m, 4 H), 6.64-6.60 (m, 2 H), 5.95 (d, = 9 Hz, 1 H), 3.84 (s, 3 H), 3.24 (s, 8 H). MS:
480(M+H+).
EXAMPLE 63
7-(2.6-dichlorophenoxy)-5- { ( 2-methoxy-4-(piperazin- 1 -y l)pheny Ijamino } py rido[3.4- d]pyridazin-4(3H)-one
EXAMPLE 63A
tert-butyl 4-(4-(7-(2,6-dichlorophenoxy)-4-oxo-3,4-dihydropyrido[3,4-d] pyridazin-5- ylamino)-3-methoxyphenyl)piperazine-l -carboxylate The title compound was obtained following the procedure described in EXAMPLE 76A, using 2,6-dichlorophenol in place of 2-fluorophenol.
EXAMPLE 63B
7-(2,6-dichlorophenoxy)-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3.4- d|pyridazin-4(3 H)-one
The title compound was obtained following the procedure described in EXAMPLE 2F. using EXAMPLE 63 A in place of EXAMPLE 2E. Ή NMR (DMSO-C&. 300 MHz): δ
12.78 (s, 1 H), 1 1.55 (s, 1 H), 8.63 (s, 2 H), 8.23(s, 1 H). 7.69 (d, J = 8.1 Hz. 2 H), 7.45 (t. J = 8.4 Hz, 1 H), 7.29 (d, .7 = 9 Hz, 1 H), 6.71 (s, 1 H), 6.64 (s, 1 H), 5.95 (d, J = 9 Hz, 1 H), 3.84 (s, 3 H), 3.25 (s, 8 H). MS: 514 (M+H+).
EXAMPLE 64
7-(2,6-dichlorobenzyl)-5-{ [4-^iperazin- l -yl)-2-(trifluoromethoxy)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
EXAMPLE 64A
/V,N-dibenzyl-4-bromo-2-(trifluoromethoxy)aniline To a mixture of 4-bromo-2-(trifluoromethoxy)aniline (5 g. 19.53 mmol) and potassium carbonate (8.09 g, 58.89 mmol) in acetonitrile (200 mL) was added
(bromomethyl)benzene (6.96 mL, 58.59 mmol) and the mixture was refluxed for 20 hours. The mixture was filtered and the filtrate was concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 5/1 petroleum ether/ethyl acetate to give the title compound. MS : 436 (M + H+). EXAMPLE 64B
teri-butyl 4-(4-(dibenzylamino)-3-(trifluoromethoxy)phenyl)piperazine-l -carboxylate A mixture of EXAMPLE 64A (7.92 g, 18.21 mmol). /erf-butyl piperazine-1 - carboxylate (3.73 g, 20 mmol), palladium diacetate (205 mg. 0.91 mmol), (±)-2,2'- bis(diphenylphosphino)-l,r-binaphthalene (850 mg, 1.36 mmol) and cesium carbonate (1 1.88 g, 36 mmol) in toluene (200 mL) was heated under nitrogen at 100UC for 20 hours. After cooling to ambient temperature, the mixture was concentrated and the residue was diluted with dichloromethane (300 mL), washed with water and brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 10/1 petroleum ether/ethyl acetate to give the title compound. MS: 542 (M + H .
EXAMPLE 64C
/er/-buty 1 4-(4-amino-3 -(trifluoromethoxy )pheny l)piperazine- 1 -carboxy late To a solution of EXAMPLE 64B (8.98 g, 16.63 mmol) in methanol ( 100 mL) was added 10% palladium on carbon (900 mg) and the mixture was stirred at ambient temperature under hydrogen for 5 hours. The catalyst was filtered off and the filtrate was concentrated to give the title compound. MS: 362 (M + H+).
EXAMPLE 64D
/er/-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-c/]pyridazin-5-ylamino)-3- (trifluoromethoxy )phenyl)piperazine-l -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 57E, using EXAMPLE 64C in place of EXAMPLE 57D. MS: 541 (M + ΗΓ).
EXAMPLE 64E
½r/-butyl 4-(4-(7-(2,6-dichlorobenzyl)-4-oxo-3,4-dihydropyrido[3,4-rf|pyridazin-5-ylamino)- 3-(trifluoromethoxy)phenyl)piperazine-l-carboxylate
The title compound was obtained following the procedure described in EXAMPLE 57F, using EXAMPLE 64D in place of EXAMPLE 57E. MS: 665 (M + H*).
EXAMPLE 64F
7-(2,6-dichlorobenzyl)-5-{ [4-(piperazin- l -yl)-2-(trifluoromethoxy)phenyl]amino}pyrido[3,4- d}pyridazin-4-ol
The title compound was obtained following the procedure described in EXAMPLE 28B, using EXAMPLE 64E in place of EXAMPLE 28A. Ή NMR (DMSO-ck. 300 MHz): δ 13.09 (s, 1 H), 1 1.74 (s, 1 H), 8.77 (br, 2 H), 8.31 (s, 1 H), 8.21 (d, J = 9.0 Hz, 1 H), 7.62 (d. J = 7.8 Hz, 2 H), 7.48 - 7.42 (m, 1 H), 7.03 - 7.00 (m, 2 H), 6.73 (dd, J = 9.0 Hz, 2.4 Hz, 1 H), 4.52 (s, 2 H), 3.33 - 3.19 (m, 8 H). MS: 565 (M + H+).
EXAMPLE 65
7-[(2.3-dichloro-6-fluorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l - 5 yl)ipheny l]amino}pyrido|3.4-d]pyrida .in-4(3H)-one
EXAMPLE 65A
tert-butyl 4-(4-((7-((2,3-dichloro-6-fluorophenyl)amino)-4-oxo-3.4- dihydropyrido[3,4- d]pyridazin-5-yl)amino)-3-methoxyphenyl)piperazine- l -carboxylate
To a solution of EXAMPLE 24A (1.05 g, 2.16 mmol), 2,3-dichloro-6-fluoroaniline 10 (0.76 g, 4.4 mmol) and ter/-butanol (10 mL) was added tris(dibenzyldeneacetone)dipalladium (0) (0.2 g, 10 mmol%), 2-dicyclohexylphosphino-2',4',6'-triisopropylbiphenyl (0.1 g, 10 mmol%) and potassium ier/-butoxide (0.6 g, 5.3 mmol). The mixture was degassed twice and heated in a sealed tube under nitrogen at 120°C for 20 hours. After concentration, the residue was purified by flash column eluting with 3/1 petroleum ether/ethyl acetate to give 15 the title compound. MS: 630 (M+H4).
EXAMPLE 65B
7-[(2,3-dichloro-6-fluorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d)pyridazin-4(3H)-one
To a solution of EXAMPLE 65A (80 mg, 0.127 mmol) in dichloromethane (15 mL) 20 was added trifluoroacetic acid (3 mL) and the mixture was stirred at room temperature overnight. Concentration provided the title compound. Ή NMR (DMSO-(/«, 300 MHz): δ 12.03 (s, 1 H), 1 1.42(s. 1 H). 9.38 (s, 1 H), 8.70 (s, 2 H). 8.04 (s, 1 H). 7.72-7.68 (m, 2 H). 7.5 1-7.45 (m, 1 H), 6.64 (d, ./ = 2.7 Hz, 1 H), 6.20 (s, 1 H). 6.08 (d. 7 = 8.7 Hz, 1 H), 4.02 (s, 3 H), 3.25 (s, 8 H). MS: 53 1 (M+H+).
25 EXAMPLE 66
7-(2,6-dichlorobenzyl)-5-{ [4-(hexahydropyrrolo[l,2-a]pyrazin-2( l H)-yl)-2- methoxyphenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one
EXAMPLE 66A
2-(3-methoxy-4-nitropheny l)octahy dropyrrolo[ 1 ,2-o]pyrazine
-30— A mixture of 4-fhioro-2-methoxy-l -nitrobenzene (342 mg, 2 mmol),
octahydropyrrolo[l ,2-i7]pyrazine (252 mg, 2 mmol) and potassium carbonate (552 mg, 4 mmol) in dimethylacetamide (10 mL) was heated at 100 °C for 16 hours. After cooling to ambient temperature, the mixture was poured into water and extracted with ethyl acetate (3 x 50 mL). The combined organic phase was washed with brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 98/2 dichloromethane/methanol to give the title compound. MS : 278 (M+rT)
EXAMPLE 66B
4-(hexahydropyrrolo[ 1 ,2-a]pyrazin-2(lH)-yl)-2-methoxyaniline
To a suspension of EXAMPLE 66A (1.58 g, 5.68 mmol) in methanol (100 mL) was added Raney-Ni (158 mg) and the mixture was stirred at ambient temperature under hydrogen for 4 hours. The catalyst was filtered off and the filtrate was concentrated to give the title compound, which was used in the next step without further purification. MS: 248 (M+H4).
EXAMPLE 66C
7-chloro-5-((4-(hexahydropyrrolo[ 1 ,2-a)py razin-2( 1 H)-y l)-2- methoxyphenyl)amino)pyrido[3,4-d]pyridazin-4(3H)-one To mixture of EXAMPLE 7K (150 mg, 0.7 mmol) and EXAMPLE 66B ( 173 mg, 0.7 mmol) in 1,4-dioxane (7 mL) was added N-ethyl-N-isopropylpropan-2-amine (270 mg, 2.1 mmol) and the mixture was heated in a sealed tube at 100°C for 1 hours. After concentration, the residue was purified by flash chromatography on silica gel eluting with 3/1 petroleum ether/ethyl acetate to give the title compound. MS: 427 (M+H+).
EXAMPLE 66D
7-(2,6-dichlorobenzyl)-5-{ [4-(hexahydropyrrolo[ l ,2-a]pyrazin-2( l H)-yl)-2- methoxyphenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one Zinc powder (2.06 g, 31.5 mmol) in tetrahydrofuran (2 mL) was heated under nitrogen to 65°C, followed by addition of 1 ,2-dibromoethane (131 mg, 1 .2 mmol) and chlorotrimethylsilane (226 mg, 1.2 mmol). After stirring for 0.5 hour, a solution of 2- (bromomethyl)-l ,3-dichlorobenzene (7.2 g, 30 mmol) in tetrahydrofuran (28 mL) was added over 20 minutes and the mixture was stirred for 2 hours and then allowed to cool to room temperature to provide 30 mL of I N (2,6-dichlorobenzyl)zinc(II) bromide solution. To a solution of EXAMPLE 66C (230 mg, 0.54 mmol) in tetrahydrofuran (20 mL) under nitrogen was added tetrakis(triphenylphospine) palladium (30 mg, 0.027 mmol). The mixture was degassed twice with nitrogen and IN (2,6-dichlorobenzyl)zinc(H) bromide (5.4 mL, 5.4 mmol) was added and the mixture was stirred at 60°C for overnight. After concentration, the residue was purifed by flash chromatography on silica gel eluting with 3/1 petroleum ether/ethyl acetate to give the title compound. Ή NMR (DMSO, 300 MHz): δ 12.59 (s, 1 H), 1 1.34 (s, 1 H). 8. 15 (s. 1 H), 8.00 (d, ./ = 9.0 Hz, 1 H). 7.55 (d, J = 7.8 Hz. 1 H), 7.43-7.38 (m, 1 H), 6.79 (s, 1 H), 6.64 (s, 1 H), 6.27 (dd, J = 9.90 Hz. 2.4 Hz, 1 H), 4.49 (s. 2 H), 3.93 (s, 3 H), 3.73-3.55 (m, 2 H), 3.14-3.10 (m, 2 H), 4.49 (t, 1 H), 3.51 -3.24 (m, 4 H). 1.91 - 1.80 (m, 3 H), 1.53-1.50 (m, 1 H). MS: 553 (M+H+).
EXAMPLE 67
7-[(2,3-dichloro-4-fluorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol
EXAMPLE 67A
tert-buty ] 4-(4-(7-(2,3-dichloro-4-fluorophenylamino)-4-oxo-3,4-dihydropyrido[3,4- c/|py ndazin-5-ylamino)-3-metho.xyphenyl)piperazine- l -carbox late A mixture of EXAMPLE 24A ( 162 mg, 0.33 mmol), 2,3-dichloro-4- fluorobenzenamine (90 mg, 0.50 mmol), tris(dibenzylideneacetone)dipalladium (3 1 mg, 0.03 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthenexanthene (20 mg, 0.03 mmol) and potassium 2-methylpropan-2-olate (1 12 mg, 1 mmol) in 2-methylpropan-2-ol (2 mL) was degassed with nitrogen twice and stirred in a sealed tube at 130°C for 15 hours. After cooling to ambient temperature, the solution was concentrated and the residue was purified by flash chromatography on silica gel eluting with 100/1 dichloromethane/methanol to give the title compound. MS: 630 (M + H+).
EXAMPLE 67B
7-[(2,3-dichloro-4-fluorophenyl)amino]-5-{ [2-methoxy-4-(piperazin- l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol The title compound was obtained following the procedure described in EXAMPLE 26E, using EXAMPLE 67A in place of EXAMPLE 26D. Ή NMR (DMS0-< 300 MHz): δ 12.34 (s, l H), 1 1.44 (s, 1 H), 9.97 (s, 1 H), 8.71 (br, 2 H), 8.06 (s, 1 H), 7.93 - 7.90 (m, 1 H), 7.68 - 7.51 (m. 2 H). 6.70 (s. 1 H). 6.23 - 6. 16 (m. 2 H), 3.67 (s. 3 H), 3.35 (br, 8 H). MS: 530 (M + H+).
EXAMPLE 68
2-[(2,6-dichlorophenyl)amino|-4-{ [2-methoxy-4-(piperazin- l -yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one
EXAMPLE 68A
ethyl 4,6-dihydroxy-2-methylnicotinate
A mixture of 2,4,6-trichlorophenol (175 g, 886 mmol), malonic acid (57.6 g, 554 mmol) and phosphorus oxychloride (160 mL, 1.77 mol) was heated at 100°C for 3 hours. After cooling to ambient temperature and concentration, the residue was poured into ice- water and filtered. The solid was washed with water and dried under vacuum. The solid was suspended in bromobenzene (400 mL) and ethyl 3-aminocrotonate (62.9 g, 487 mmol) and the mixture was heated at 155°C for 1.5 hours. The mixture was concentrated and washed with 2/1 petroleum ether/ethyl acetate to give the title compound. MS: 198 (M + H+).
EXAMPLE 68B
ethyl 4,6-dichloro-2-methylnicotinate
A mixture of EXAMPLE 68A (87.3 g, 443 mmol) and phosphorus oxychloride (300 mL) was refluxed at 140°C for 2.5 hours. After cooling to ambient temperature and concentration, the residue was poured into ice-water and extracted with ethyl acetate (2 x 300 mL). The organic phase was dried over sodium sulfate, concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with a gradient of 1 0/1 to 20/ 1 petroleum ether/ethyl acetate to give the title compound. MS: 234 (M + HT).
EXAMPLE 68C
ethyl 2-(bromomethyl)-4,6-dichloronicotinate To a solution of EXAMPLE 68B (30.0 g, 128 mmol) in tetrachloromethane (500 mL) was added N-bromosuccinimide (68.4 g, 384 mmol) and benzoyl peroxide (9.29 g, 38.4 mmol) and the mixture was heated at 85°C for 1 day. The mixture was cooled to ambient temperature and filtered and the filtrate was concentrated. The residue was dissolved in ethyl acetate (400 mL), washed with brine (400 mL), dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 80/1 petroleum ether/ethyl acetate to give the title compound. MS : 314 (M + hT).
EXAMPLE 68D
ethy 1 4,6-dichloro-2-formy lnicotinate
To a suspension of 4A molecular sieves (30 g) in acetonitrile (300 mL) was added 1 - methylpiperidine 1 -oxide (20.6 g, 176 mmol) and the mixture was stirred at ambient temperature for 10 minutes. A solution of EXAMPLE 68C (25.0 g. 79.9 mmol) in acetonitrile (100 mL) was added and the mixture was stirred at ambient temperature for 1 hour. The mixture was filtered and the filtrate was concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with a gradient of 100/1 to 80/ 1 petroleum ether/ethyl acetate to give the title compound. MS: 248 (M + H+).
EXAMPLE 68E
ethyl 2-((2-(/e/-/-butoxycarbonyl)hydrazono)methyl)-4,6-dichloronicotinate To a solution of EXAMPLE 68D (1 1.7 g, 47.2 mmol) in dioxane (200 mL) was added fer/-butyl hydrazinecarboxylate (7.47 g, 56.6 mmol) and the mixture was stirred at ambient temperature for 15 hours. After concentration, the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with a gradient of 30/1 to 4/1 petroleum ether/ethyl acetate to give the title compound. MS: 362 (M + H+).
EXAMPLE 68F
2,4-dichloropyrido[2,3-rf]pyridazin-5(6H)-one To a solution of EXAMPLE 68E (10.6 g, 29.3 mmol) in dichloromethane (120 mL) was added trifluoroacetic acid (20 mL) and the mixture was stirred at ambient temperature for 5 hours. After concentration, the residue was washed with 1/1 petroleum ether/ethyl acetate. The filtrate was concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 10/1 petroleum ether/ethyl acetate to give the title compound. MS: 216 (M + H+).
EXAMPLE 68G
tert-buty] 4-(4-((2-chloro-5-oxo-5,6-dihydropyrido[2,3-i |pyridazin-4-yl)amino)-3- methoxyphenyl)piperazine-l -carboxylate
A mixture of EXAMPLE 68F (0.350 g, 1.62 mmol). EXAMPLE 1 G (0.596 g, 1 .94 mmol), N,N-diisopropylethylamine (0.418 g, 3.24 mmol) and 1 ,4-dioxane (8 mL) was heated in a sealed tube at 120°C for 3 hours. After cooling to ambient temperature, the mixture was concentrated. The residue was washed with 20/1 petroleum ether/ethyl acetate and purified by flash chromatography on silica gel (200-300 mesh) eluting with 50/1
dichloromethane/methanol to give the title compound. MS: 487 (M + H+).
EXAMPLE 68H
terf-butyl 4-(4-((2-((2,6-dichlorophenyl)amino)-5-oxo-5,6-dihydropyrido[2,3-i/]pyridazin-4- yl)amino)-3-methoxypheny piperazine- 1 -carboxylate A mixture of EXAMPLE 68G (60.0 mg, 0.123 mmol), 2.6-dichloroaniline (24.0 mg, 0.148 mmol), tris(dibenzylideneacetone)dipalladium (1 1.3 mg, 0.0123 mmol), 2- dicyclohexylphosphino-2',4',6'-triisopropylbiphenyl (1 1.7 mg, 0.0246 mmol), potassium rt-butoxide (27.6 mg, 0.246 mmol) and rc-butanol (3 mL) was degassed with nitrogen and heated in a sealed tube at 1 10°C for 15 hours. After cooling to ambient temperature, the mixture was concentrated and the residue was dissolved in dichloromethane, filtered and purified by preparative TLC using 2/3 petroleum ether/ethyl acetate to give the title compound. MS: 612 (M · H ).
EXAMPLE 681
2-[(2,6-dichlorophenyl)amino]-4-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one To a solution of EXAMPLE 68H (29.4 mg, 0.048 mmol) in dichloromethane (10 mL) was added trifluoroacetic acid (4 mL) and the mixture was stirred at ambient temperature for 2 hours. After concentration, the residue was washed with 20/1 petroleum
ether/dichloromethane to give the title compound as a solid trifluoroacetate salt. Ή NMR (DMSO-i i, 300 MHz.): δ 12.57 (s. 1 H). 10.40 (s. 1 H). 9. 10 (s. 1 H). 8.77 (s. 2 H). 7.79 (s. 1 H), 7.56 (d, 7 = 8.4 Hz. 2 H), 7.37 - 7.26 (m. 2 H). 6.78 (s. 1 H). 6.61 (d, J = 8.7 Hz. 1 H). 6.06 (s, 1 H), 3.83 (s, 3 H), 3.42 - 3.38 (m, 4 H), 3.28 (br, 4 H). MS: 512 (M + H+).
EXAMPLE 69
7-(2,6-dichlorobenzyl)-5-{ [2,3-dimethyl-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3 H)-one
EXAMPLE 69A
N,N-dibenzyl-4-bromo-2,3-dimethylaniline
The title compound was obtained following the procedure described in EXAMPLE 64 A. using 4-bromo-2,3-dimethy aniline in place of 4-bromo-2- (trifluoromethoxy)aniline. MS: 380 (M + H+).
EXAMPLE 69B
fcr/-butyl 4-(4-(dibenzylamino)-2,3-dimethylphenyl)piperazine- l -carbox late The title compound was obtained following the procedure described in EXAMPLE 64B, using EXAMPLE 69A in place of EXAMPLE 64A. MS: 486 (M + H+).
EXAMPLE 69C
ier/-buty 1 4-(4-amino-2 ,3 -dimethy lpheny l)piperazine- 1 -carbo y late The title compound was obtained following the procedure described in EXAMPLE 64C, using EXAMPLE 69B in place of EXAMPLE 64B. MS: 306 (M + Yf).
EXAMPLE 69D
/eri-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-i/]pyridazin-5-ylamino)-2,3- dimethylphenyl)piperazine-l-carboxylate
The title compound was obtained following the procedure described in EXAMPLE 57E, using EXAMPLE 69C in place of EXAMPLE 57D. MS: 485 (M + HT).
EXAMPLE 69E
4- 4-(7-(2,6-dichlorobenzyl)-4-oxo-3,4-dihydropyrido[3,4-i |pyridazin-5-ylaminoJ- 2,3 -dimethy lpheny l)piperazine- 1 -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 7F, using EXAMPLE 69D in place of EXAMPLE 57E. MS: 609 (M + H+).
EXAMPLE 69F 7-(2,6-dichlorobenz l)-5-{ [2,3-dimethyl-4-(piperazin-l -yl)phenyl]amm^
d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 28B, using EXAMPLE 69E in place of EXAMPLE 28 A. Ή NMR (DMSO-< 300 MHz): δ 12.99 (s, 1 H), 1 1.1 1 (s. 1 H), 8.77 (brs, 2 H), 8.27 (s, 1 H), 7.79 (d, J = 8.7 Hz, 1 H), 7.54 (d, J = 7.8 Hz, 2 H), 7.39 (dd, J = 8.7 Hz , 7.2 Hz, 1 H), 6.82 (s, 1 H), 6.73 (d, J = 8.7 Hz, 1 H), 4.42 (s, 2 H), 3.30 (br, 4 H), 3.01 (brs, 4 H), 2.24 (s, 3 H), 2.18 (s, 3 H). MS: 509 (M+H+).
EXAMPLE 70
2-(2,6-dichlorobenzyl)-4-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one
EXAMPLE 70A
/eri-butyl 4-(4-((2-(2,6-dichlorobenzyl)-5-oxo-5,6-dihydropyrido[2.3-£ |pyridazin-4- y l)amino)-3 -methoxypheny l)piperazine- 1 -carboxy late A mixture of EXAMPLE 68G (50.0 mg, 0.103 mmol), 0.5M (2,6- dichlorobenzyl)zinc(II) bromide in tetrahydrofuran (2.1 mL, 1.05 mmol),
tetrakis(triphenylphosphine)palladium (1 1.9 mg, 0.0103 mmol) and tetrahydrofuran (3 mL) was degassed with nitrogen and heated in a sealed tube at 80°C for 15 hours. After cooling to ambient temperature, the reaction was quenched with saturated aqueous ammonium chloride ( 1 mL). The mixture was extracted with tetrahydrofuran (3 x 20 mL) and the organic phase was dried over anhydrous sodium sulfate, concentrated and purified by preparative TLC using 3/4 petroleum ether/ethyl acetate to give the title compound. MS: 61 1 (M + H").
EXAMPLE 70B
2-(2,6-dichlorobenzyl)-4-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one
To a solution of EXAMPLE 70A (30.9 mg, 0.0505 mmol) in dichloromethane (6 mL) was added trifluoroacetic acid (3 mL) and the mixture was stirred at ambient temperature for 2 hours. After concentration, the residue was washed with 10/1 petroleum
ether/dichloromethane to give the title compound as a solid trifluoroacetate salt. Ή NMR (DMS0-< 300 MHz): δ 12.86 (s, 1 H), 10.59 (s, 1 H), 8.74 (s, 2 H), 8.10 (s, 1 H), 7.51 (d, J = 8.1 Hz, 2 H), 7.38 - 7.33 (m, 1 H), 7.15 (d, J = 8.7 Hz, 1 H),6.70 (s, 1 H), 6.55Td, = 8.4 Hz, 1 H), 6.34 (s, 1 H), 4.37 (s, 2 H), 3.75 (s, 3 H). 3.42 - 3.38 (m, 4 H), 3.28 (m, 4 H). MS: 5 1 1 (M + H+).
EXAMPLE 71 7-[(2-chloro-4,6-difluorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l - y l)pheny 1] amino } py rido [3 ,4-d]py ridazin-4-ol
EXAMPLE 71 A
/erf-butyl 4-(4-(7-(2-chloro-4,6-difluorophenylamino)-4-oxo-3,4-dihydropyrido[3,4- ^pyridazin-5-ylamino)-3-methoxyphenyl)piperazine- 1 -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 67A, using 2-chloro-4,6-difluoroaniline in place of 2,3-dichloro-4-fluorobenzenamine. MS: 614(M+H+).
EXAMPLE 71 B
7-[(2-chloro-4,6-difluorophenyl)amino]-5-{[2-methoxy-4-(piperazin- l - y l)pheny ljamino } py rido [3 ,4-d]py ridazin-4-ol The title compound was obtained following the procedure described in EXAMPLE 26E, using EXAMPLE 71 A in place of EXAMPLE 26D. Ή NMR (DMSO-efe, 300 MHz): δ 12.32 (s, 1 H), 1 1.45 (s, 1 H), 9.19 (s, 1 H), 8.75 (brs, 2 H), 8.06 (s, 1 H), 7.80 (brs, 1 H), 7.60-7.53 (m, 2 H), 6.69 (s, 1 H), 6.18-6.10 (m, 2 H), 3.87 (s, 3 H), 3.35 (brs, 8 H). MS: 514(M+H+).
EXAMPLE 72
7-(2.6-dichlorobenzyl)-5-{ [2-methoxy-5-methyl-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 72A
4-bromo-2-methoxy -5 -methy lbenzenamine
To a solution of 2-methoxy-5-methylbenzenamine (5 g, 36.5 mmol) in N,N- dimethylformamide (150 mL) at ambient temperature was added dropwise N- bromobutanimide (6.5 g, 36.5 mmol). After stirring for 16 hours, the mixture was diluted with water (150 mL) and extracted with ethyl acetate (3 x 100 mL). The organic layers were dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash
chromatography on silica gel (200-300 mesh) eluting with 10/1 petroleum ether/ethyl acetate to give the title compound. MS: 216 (M+H+).
EXAMPLE 72B
N,N-dibenzyl-4-bromo-2-methoxy-5-methylbenzenamine
A suspension of EXAMPLE 72A (3 g, 14 mmol), (bromo methyl)benzene (6 g, 35 mmol) and potassium carbonate (4.8 g, 35 mmol) in acetonitrile (150 mL) was heated at reflux for 20 hours. After concentration, the residue was diluted with ethyl acetate (100 mL) and washed with water (30 mL). The organic layer was dried over anhydrous sodium sulfate. filtered, concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 50/1 petroleum ether/ethyl acetate to give the title compound. MS: 396 (M+H+).
EXAMPLE 72C
½r/-buty 1 4-(4-(dibenzy lamino)-5 -methoxy -2-methy lpheny I)piperazine- 1 -carboxy late A suspension of EXAMPLE 72B (2 g, 5.1 mmol), tert-butyl piperazine-1 -carboxy late
(1. 1 g, 6. 1 mmol), palladium(II) acetate (115 mg, 0.5 mmol), 2,2'-bis(diphenylphosphino)- Ι , -binaphthyl ( 635 mg, 1 mmol) and cesium carbonate (3.3 g, 10.1 mmol) in toluene (100 mL) was heated to reflux under nitrogen for 16 hours. After concentration, the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 10/1 petroleum ether/ethyl acetate to give the title compound. MS: 502 (M+H+).
EXAMPLE 72D
ieri-butyl 4-(4-amino-5-methox -2-methy lpheny l)piperazine- l -carboxy late A suspension of EXAMPLE 72C ( 1.6 g, 3.2 mmol) and 10% palladium on carbon (160 mg) in methanol (100 mL) was stirred under hydrogen for 18 hours. The catalyst was filtered off and the filtrate was concentrated to give the title compound which was used in the next step without further purification. MS: 322 (M+H+).
EXAMPLE 72E
ieri-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-i/]pyridazin-5-ylamino)-5-methoxy-2- me thy lph eny l)piperazine- 1 -c arboxy late
A solution of EXAMPLE 7K (200 mg, 0.93 mmol). EXAMPLE 72D (360 mg, 1.12 mmol) and /VN-diisopropylethylamine (240 mg, 1.86 mmol) in 1 ,4-dioxane (20 mL) was heated in a sealed tube at 120°C for 18 hours and cooled to ambient temperature. The precipated solid was filtered and washed with hexane (20 mL) to give the title compound. MS: 501 (M+H*).
EXAMPLE 72F
tert-butyl 4-(4-(7-(2,6-dichlorobenzyl)-4-oxo-3,4-dihydropyrido[3,4-i/|pyridazin-5-ylamino)- 5 -methoxy -2-methy lpheny l)piperazine- 1 -carboxy late A suspension of EXAMPLE 72E (200 mg, 0.4 mmol). 0.5M (2.6- dichlorobenzyl)zinc(II) bromide in tetrahydrofuran (8 mL, 4 mmol) and
tetrakis<triphenylphosphine) palladium(O) (46 mg, 0.04 mmol) in tetrahydrofuran (30 mXJ was heated at 70°C under nitrogen for 1 hours. After cooling, the mixture was diluted with saturated ammonium chloride (50 mL) and extracted with dichloromethane (3 x 20 mL). The organic layers were dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 3/1 petroleum ether/ethyl acetate to give the title compound. MS. 625 (M+hT).
EXAMPLE 72G
7-(2,6-dichlorobenzyl)-5-{ [2-methoxy-5-methyl-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
A solution of EXAMPLE 72F (200 mg, 0.32 mmol) and trifluoroacetic acid (6 mL) in dichloromethane (30 mL) was stirred at ambient temperature for 3 hours. After
concentration, the residue was washed with methanol (3 x 5 mL) to give the title compound. Ή NMR (DMSO-ek, 300 MHz): δ. 12.92 (s, 1 H), 11.65 (s, 1 H), 8.70 (s, 2 H), 8.26 (s, 1 H). 8.21 (s, 1 H), 7.55(d, 2 H), 7.38(t, 1 H), 6.91 (s, 1 H), 6.71 (s, 1 H), 4.49 (s, 2 H), 3.81 (s, 3 H), 3.27 (m, 4 H), 3.03 (m, 4 H), 2. 14 (s, 3 H). MS: 525 (M+H+).
EXAMPLE 73
7-(2,6-dichlorobenzyl)-5-{ [2-fluoro-5-methyl-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 73A
/V,jV-dibenzy l-4-bromo-2-fluoro-5-methylbenzenamine
A suspension of 4-bromo-2-fluoro-5-methylbenzenamine (1 g, 4.9 mmol), benzylbromide (2.5 g, 14.7 mmol) and potassium carbonate (2 g, 14.7 mmol) in acetonitrile (80 mL) was heated in a sealed tube at 100°C for 16 hours. After concentration, the residue was diluted with ethyl acetate (80 mL) and washed with water (20 mL). The organic layer was dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 50/1 petroleum ether/ethyl acetate to give the title compound. MS : 384 (M+H+).
EXAMPLE 73B
ieri-buty 1 4-(4-(dibenzy lamino)-5 -methoxy-2-methy lpheny l)piperazine- 1 -carboxy late A suspension of EXAMPLE 73A (3.2 g, 8.4 mmol), tert-butyl piperazine- 1 - carboxy late (1.9 g, 10. 1 mmol), palladium(II) acetate (189 mg, 0.84 mmol), 2,2'- bis(diphenylphosphino)-l , l'-binaphthyl (1.05 g, 1.7 mmol) and cesium carbonate (5.5 g, 16.8 mmol) in toluene (200 mL) was heated at reflux under nitrogen for 16 hours. After concentration, the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 10/1 petroleum ether/ethyl acetate to give the title compound. MS: 490 (M+f ^.
EXAMPLE 73C
ieri-buty 1 4-(4-amino-5 -fluoro-2-methy lpheny l)piperazine- 1 -carboxy late
A suspension of EXAMPLE 73B (2 g, 4.1 mmol) and 10% palladium on carbon (200 mg) in methanol (100 mL) was stirred under hydrogen for 18 hours. The catalyst was filtered off and the filtrate was concentrated and purified by flash chromatography on silica gel (200- 300 mesh) eluting with 1/1 petroleum ether/ethyl acetate to give the title compound. MS: 310 (M+rf).
EXAMPLE 73D
?er/-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-rf]pyridazin-5-ylamino)-5-fluoro-2- methylpheny l)piperazine- 1 -carboxylate
A solution of EXAMPLE 7K (200 mg, 0.93 mmol), EXAMPLE 73C (346 mg, 1. 12 mmol) and NN-diisopropylethylamine (240 mg, 1.86 mmol) in 1 ,4-dioxane (20 mL) was heated in a sealed tube at 120°C for 18 hours and cooled to ambient temperature. After concentration, the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 5/1 petroleum ether/ethyl acetate to give the title compound. MS: 489 (M+H+).
EXAMPLE 73 E
feri-butyl 4-(4-(7-(2,6-dichlorobenzyl)-4-oxo-3,4-dihydropyrido[3,4-i/]pyridazin-5-ylamino)- 5-fluoro-2-methylphenyl)piperazine-l -carboxylate A suspension of EXAMPLE 73D (180 mg, 0.4 mmol). 0.5M (2,6- dichlorobenzyl)zinc(II) bromide in tetrahydrofuran (6 mL. 3 mmol) and
tetTakis(triphenylphosphine) palladium( ) (43 mg. 0.04 mmol) in tetrahydrofuran (30 mL) was heated at 70 °C under nitrogen for 16 hours. After cooling, the mixture was diluted with saturated ammonium chloride (50 mL) and extracted with dichloromethane (3 x 20 mL). The organic layers were dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 5/1 petroleum ether/ethyl acetate to give the title compound. MS: 613 (M+H+).
EXAMPLE 73F
7-(2,6-dichlorobenzyl)-5-{ [2-fluoro-5-methyl-4-(piperazin- l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
A solution of EXAMPLE 73E (170 mg, 0.28 mmol) and trifluoroacetic acid (5 mL) in dichloromethane (25 mL) was stirred at ambient temperature for 2 hours. After
concentration, the residue was washed with methanol (3 x 5 mL) to give the title compound. Ή NMR (DMS0-< 300 MHz): δ 13.01 (s, 1 H), 11.57 (s, 1 H), 8.69 (s, 2 H), 8.33 (s, 1 H), (d, 1 H), 7.55(d, 2 H), 7.37(t, 1 H), 7.05 (d, 2 H), 7.00 (s, 1 H), 4.50 (s, 2 H), 3.26 (m^T
H), 3.01 (m, 4 H), 2.18 (s, 3 H). MS: 513 (M+H+).
EXAMPLE 74
6-(2,6-dichlorobenzyl)-8-[(6-methoxy-l ,2,3,4-tetrahydroisoquinolin-7-yl)amino]phthalazin- l (2H)-one EXAMPLE 74A
methyl 3-methoxyphenethylcarbamate
To a solution of methyl carbonochloridate (25 g, 265 mmol) in dichloromethane (100 mL) at 0°C was added slowly methyl 3-methoxyphenethylcarbamate (40 g, 265 mmol) and the mixture was stirred for 0.5 hours at 0°C and at ambient temperature for 16 hours. The mixture was poured into ice-brine (200 mL) and extracted with dichloromethane (3 * 100 mL). The combined organic layers were dried over anhydrous sodium sulfate, filtered and concentrated. The residue was washed with hexane (50 mL) and the filtrate was concentrated to give the crude title compound. MS: 210 (M+H+).
EXAMPLE 74B
6-methoxy-3,4-dihydroisoquinolin-l (2 /)-one
To poly phosphoric acid (70 m L) at 120°C was added slowly EXAMPLE 74A ( 10 g. 47.8 mmol) and the mixture was stirred at 120"C for 1 hour. After cooling, the mixture was poured into ice-water (300 mL) and extracted with dichloromethane (2 * 20() mL). The combined organic layers were washed with brine (100 mL), dried over anhydrous sodium sulfate, filtered and concentrated to give the title compound. MS : 178 (M+H+).
EXAMPLE 74C
6-methoxy-l ,2,3,4-tetrahydroisoquinoline
To a suspension of lithium aluminum hydride (10 g, 46 mmol) in tetrahydrofuran (100 mL) at 0"C under nitrogen was added slowly a solution of EXAMPLE 74B (4. 1 g, 23 mmol) in tetrahydrofuran (50 mL) over 0.5 hours and the mixture was heated at 70°C for 2 hours. After cooling to 0°C, 15% sodium hydroxide (4.9 mL) was added slowly and the mixture was filtered and washed with ethyl acetate (50 mL). The filtrate was concentrated to give the crude title compound. MS : 1 64 (M+H+).
EXAMPLE 74D
/eri-butyl 6-methoxy-3,4-dihydroisoquinoline-2(l//)-carboxylate To a solution of EXAMPLE 74C (1.88 g, 11.5 mmol) in dichloromethane (40 mL) was added triethylamine (2.3 g, 23 mmol) and di-feri-butyl dicarbonate (3 g, 13.8 mmol). After stirring for 16 hours, the mixture was poured into water (50 mL) and extracted with dichloromethane (2 * 100 mL). The combined organic layers were dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel eluting with 10: 1 hexane :ethyl acetate to give the title compound. MS : 264 (M+HT).
EXAMPLE 74E
tert-but 1 6-methoxy -7-nitro-3 ,4-dihy droisoquinoline-2( l /)-carboxy late To a solution of EXAMPLE 74D (2.46 g. 9.35 mmol) in nitromethane (30 mL) at - 1 ()°C was added acetic anhydride (5.7 g, 56.1 mmol) and concentrated nitric acid (0.88 g. 14 mmol). After stirring for 3 hours, the mixture was adjusted to pH 7 with aqueous sodium bicarbonate solution and extracted w ith dichloromethane (2 χ 100 mL). The combined organic layers were dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel eluting with 5: 1 hexane:ethyl acetate to give the title compound. MS: 309 (Μ+ΚΓ).
EXAMPLE 74F
/err-butyl 7-amino-6-methoxy-3,4-dihydroisoquinoline-2(l /)-carboxylate To a solution of EXAMPLE 74E (550 mg. 1.78 mmol) in methanol (10 mL) was added Raney Nickel (55 mg) and the mixture was stirred at ambient temperature under hydrogen for 1 hours. The mixture was filtered, concentrated and dried under vacuum to give the crude title compound. MS: 279 (M+H+).
EXAMPLE 74G
iert-butyl 7-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-d]pyridazin-5-ylamino)-6-methoxy-3,4- dihydroisoquinoline-2(l/ )-carboxylate
To a solution of EXAMPLE 7K (200 mg, 0.93 mmol) in dioxane (10 mL) was added EXAMPLE 74F (284 mg, 1.02 mmol) and NN-diisopropylethylamine (600 mg, 4.65 mmol), and the mixture was stirred in a sealed tube at 120°C for 16 hours. After cooling to ambient temperature, the mixture was poured into water (50 mL) and extracted with dichloromethane (100 mL). The combined organic layers were dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel eluting with 100: 1 dichlomethane/methanol to give the title compound. MS : 458 (M+rf).
EXAMPLE 74H
/err-butyl 7-(7-(2,6-dichlorobenzyl)-4-oxo-3,4-dihydropyrido[3,4-i/]pyridazin-5-ylamino)-6- methoxy-3,4-dihydroisoquinoline-2(l//)-carboxylate To a solution of EXAMPLE 74G (200 mg, 0.44 mmol) in tetrahydrofuran (10 mL) was added 0.5M (2,6-dichlorobenzyl)zinc(II) bromide in tetrahydrofuran (8.8 mL, 4.4 mmol) and tetrakis(triphenylphosphine)palladium (46 mg, 0.04 mmol). After stirring at 70°C under nitrogen overnight, the mixture was cooled to ambient temperature, poured Into water ( u mL) and extracted with ethyl acetate (3 χ 50 mL). The combined organic layers were dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel eluting with 100: 1 dichlomethane/methanol to give the title compound. MS: 582.1 (M+H+). EXAMPLE 741
6-(2,6-dichlorobenzyl)-8-[(6-methoxy-l ,2,3,4-tetrahydroisoquinolin-7-yl)amin
l (2H)-one
To EXAMPLE 74H (220 mg, 0.38 mmol) in dichloromethane (10 mL) was added 2,2,2-trifluoroacetic acid (4 mL) and the mixture was stirred at ambient temperature for 3 hours. After concentration, the residue was purified by preparative HPLC eluting with a gradient of 10/90 to 30/20 acetonitrile/water (containing 0.1% trifluoroacetic acid) to give the title compound as a the trifluoroacetate salt. Ή NMR (DMSO-d6) 300 MHz): δ 12.99 (s. 1 H), 11.86 (s, 1 H), 9.03 (s, 2 H), 8.30 (s, 1 H), 8.21 (s, 1 H), 7.60 (d, J = 8.1 Hz, 2 H), 7.42 (t, J = 8.1 Hz, 1 H), 6.99 (s, 1 H), 6.92 (s, 1 H), 4.53 (s, 2 H), 4.06 (s, 2 H), 3.90 (s, 3 H), 3.41 (br, 2 H), 2.96 (d, J = 6.0 Hz, 2 H). MS : 482. 1 (Μ+Ι-Γ).
EXAMPLE 75
7-(2,6-difluorophenoxy)-5-{ [2-methoxy-4-(piperazin-l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 75 A
/er/-butyl 4-(4-(7-(2,6-difluorophenoxy)-4-oxo-3,4-dihydropyrido[3,4-cf|pyridazin-5- ylamino)-3-methoxyphenyl)piperazine-l -carboxylate A mixture of EXAMPLE 24A (200 mg, 0.4 mmol), 2,6-difluorophenol (107 mg, 0.82 mmol), cuprous iodide (8 mg, 0.04 mmol), NN-dimethylglycine (13 mg, 0.12 mmol) and and cesium carbonate (267 mg, 0.8 mmol) in 1 ,4-dioxane (4 mL) was heated at 120°C for 20 hours. After concentration, the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 98/2 dichloromethane/methanol to give the title compound. MS : 581 (M+ T).
EXAMPLE 75B
7-(2,6-difluorophenoxy)-5- { [2-methoxy-4-(piperazin- 1 -y l)pheny 1] amino }py rido[3 ,4- d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 28B, using EXAMPLE 75 A in place of EXAMPLE 28A. Ή NMR (DMSO-<¾, 300MHz): δ 12.84 (s, 1 H), 1 1 .63 (s, 1 H), 8.78-8.73 (br, 2 H), 8.26 (s, 1 H), 7.51 -7.37 (m, 4 H), 6.74 (s, 1 H), 6.69 (d, J = 2.1 Hz, 1 H), 6.00 (dd, J = 2. 1 Hz. J = 9.0 Hz, 1 H), 3.88 (s, JTTJ, 3.28 (s, 8 H). MS: 481 (M+H+).
EXAMPLE 76
7-(2-fluorophenoxy)-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4-d]pyridazin-
4-ol EXAMPLE 76A
/er/-butyl 4-(4-(7-(2-fluorophenoxy)-4-oxo-3,4-dihydropyrido[3,4-^pyridazin-5-ylarnino)-3- methoxyphenyl)piperazine-l -carboxylate
To a solution of EXAMPLE 24A (200 mg, 0.4 mmol) and 2-fluorophenol (100 mg, 0.8 mmol) in dioxane (5 mL) was added (S)-2-(dimethylamino)pentanedioic acid (13 mg, 0.13 mmol) and copper(I) iodide (10 mg, 0.05 mmol). The mixture was degassed with nitrogen twice and stirred at 120'C for 15 hours. After cooling to ambient temperature, the mixture was concentrated and purified by flash chromatography on silica gel eluting with 80: 1 dichloromethane : methanol to give the title compound. MS: 563 (M+H+).
EXAMPLE 76B
7-(2-fluorophenoxy)-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4-d]pyridazin-
4-ol
The title compound was obtained following the procedure described in EXAMPLE 26E. using EXAMPLE 76A in place of EXAMPLE 26D. Ή NMR (DMSO-c/6. 300 MHz): δ 12.78 (s, 1 H), 1 1.61 (s, 1 H), 8.70 (br, 2 H), 8.25 (s, 1 H), 7.52-7.37 (m, 5 H), 6.68-6.64 (m, 2 H), 6.02-5.99 (m, 2 H), 3.88 (s, 3 H), 3.35 (s, 8 H). MS: 463 (M+H*).
EXAMPLE 77
5-{ [2-methoxy-4-( iperazin-l -yI)phenyl]amino}-7-[(2,3,4-trichlorophenyI)amino]pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 77A
tert-butyl4-(3-methoxy-4-(4-oxo-7-(2,3,4-trichlorophenylamino)-3,4-dihydropyrido[3,4- <^pyridazin-5-ylamino)phenyl)piperazine- l -carbox late To a solution of EXAMPLE 24A (200 mg, 0.412 mmol) in 1.4-dioxane (20 mL) was added 2,3,4-trichlorobenzenamine (121 mg, 0.617 mmol). dimethylbisdiphenyl
phosphinoxanthene (24 mg. 0.041 mmol), tris(dibenzy lideneacetone)dipalladium (38 mg, 0.041 mmol) and potassium tert-butoxide (138 mg, 1.24 mmol) in tert-butoxide (20 mL). After heating at 120°C under nitrogen for 14 hours, the mixture was cooled to ambient temperature, filtered, concentrated and purified by flash chromatography on silica gel (200- 300 mesh) eluting with 3/1 petroleum ether /ethyl acetate to provide the title compound. MS: 646 (M + H+).
EXAMPLE 77B
5-{ |2-methoxy-4-(piperazin- l -yl)phenyl]amino }-7-[(2,3.4-trichlorophenyl)amino)pyrido[3,4- d]pyridazin-4(3H)-one To a solution of EXAMPLE 77A (120 mg, 0.19 mmol) in dichloromethane (20 mL) was added 2,2,2-trifluoroacetic acid (6 mL) and the mixture was stirred at ambient temperature for 6 hours. The mixture was concentrated and the residue was purified by preparative HPLC using a gradient of 10/90 to 90/10 acetronitrile in water (containing 0. 1% trifluoroacetic acid) to give the title compound. Ή NMR (DMSO-< 300 MHz): δ 12.37 (s, 1 H), 11.39 (s, 1 H), 9.42 (s, 1 H), 8.73 - 8.68 ( brs, 2 H), 8.08 (s, 1 H), 7.86 - 7.83 (d, J = 9 Hz. 1 H), 7.68 - 7.67 (d, J = 3 Hz. 1 H), 6.71 - 6.70 (d, J = 3 Hz, 1 H), 6.30 - 6.15 (m, 2 H), 3.87 (s, 2 H). 3.30 (m, 8 H). MS: 451 (M + FT).
EXAMPLE 78
7-(2,3-difluorophenoxy )-5 - { [2-methoxy -4-(piperazin- 1 -y l)pheny l]amino } py rido [3 ,4- d]pyridazin-4-ol
EXAMPLE 78A
/eri-butyl 4-(4-(7-(2,3-difluorophenoxy)-4-oxo-3,4-dihydropyrido[3,4-c/]pyridazin-5- ylamino)-3-methoxyphenyl)piperazine-l -carboxylate The title compound was obtained following the procedure described in EXAMPLE
76A. using 2.3-difluorophenol in place of 2-fluorophenol. MS: 581 (M+H+).
EXAMPLE 78B
7-(2,3-difluorophenoxy )-5- { [2-methoxy -4-(piperazin- 1 -y l)pheny l]amino }py rido[3 ,4- d]pyridazin-4-ol
The title compound was obtained following the procedure described in EXAMPLE
77B, using EXAMPLE 78A in place of EXAMPLE 77A. Ή NMR (DMSO-d6, 300 MHz,): δ 1 1.52 (s, 1 H), 8.21 (s, 1 H), 7.40-7.28 (m, 5 H), 6.37-6.61 (m, 2 H), 5.95 (dd, J = 9.0, 2.4 Hz, 1 H), 3.84 (s, 3 H), 3.05 (dd, J = 20.7, 5.7 Hz, 4 H), 2.84-2.81 (dd, J = 20.4, 5.7 Hz, 4 H). MS : 481 (M+HT .
EXAMPLE 79
7-(2,3-dichlorophenoxy)-5-{ [2-methoxy -4-(piperazin-l -yl)phenyllamino}pyrido[3, 4- d)pyridazin-4(3H)-one
EXAMPLE 79A
tert-butyl 4-(4-(7-(2,3-dichlorophenoxy)-4-oxo-3,4-dihydropyrido[3,4-i/]pyridazin-5- ylamino)-3-methoxyphenyl)piperazine-l -carboxylate
A mixture of EXAMPLE 24A (200 mg, 0.41 mmol), 2,3-dichlorophenol (134 mg, 0.82 mmol), cuprous iodide (8 mg, 0.04 mmol), NN-dimethylglycine (13 mg, 0.02 mmol) and cesium carbonate (267 mg, 0.82 mmol) in dioxane (20 mL) was degassed with nitrogen for 5 minutes and heated at 120°C for 16 hours. After concentration, the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with a gradient of 80/1 to 20/1 dichloromethane/methanol to give the title compound. MS: 613 (M+H+).
EXAMPLE 79B
7-(2,3-dichlorophenoxy)-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3.4- d]pyridazin-4(3H)-one
To a solution of EXAMPLE 79A (230 mg, 0.38 mmol) in dichloromethane (5 mL) was added trifluoroacetic acid (2 mL). After stirring at ambient temperature for 3 hours, the mixture was concentrated and the residue was purified by preparative HPLC using a gradient of 10/90 to 90/10 acetronitrile in water (containing 0.1% trifluoroacetic acid) to give the title compound. Ή NMR (CD3OD, 300 MHz): δ 12.80 (s, 1 H), 1 1.56 (s, 1 H), 8.74 (s, 2 H), 8.26 (s, 1 H), 7.73 (dd, J = 1.5, 8. 1 Hz, 1 H), 7.56 (t. J = 8.1 Hz, 1 H), 7.48 (dd, J = 1 .5, 8.1 Hz, 1 H), 7.40 (d../ = 8.7 Hz, 1 H), 6.69 - 6.68 (m, 2 H), 6.03 (dd. J = 2.4. 8.7 Hz. 1 H). 3.88 (s. 3 H). 3.29 (brs. 8 H). MS: 5 13 (Μ+Η').
EXAMPLE 80
7-(2,6-dichloro-4-fluorophenoxy)-5-{ [2-methoxy-4-(piperazin- l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one
EXAMPLE 80A
feri-butyl 4-(4-(7-(2,6-dichloro-4-fluorophenoxy)-4-oxo-3,4-dihydropyrido[3,4-i/]pyridazin- 5 -y lamino)-3 -methoxy pheny l)piperazine- 1 -carboxy late The title compound was obtained following the procedure described in EXAMPLE
75 A, using 2,6-dichloro-4-fluorophenol in place of 2.6-difluorophenol. MS: 631 (M+hT).
EXAMPLE 80B
7-(2,6-dichloro-4-fluorophenoxy)-5-{ [2-methoxy-4-(piperazin- l - y l)pheny l]amino }py rido [3 ,4-d]py ridazin-4(3 H)-one The title compound was obtained following the procedure described in EXAMPLE
28B, using EXAMPLE 80A in place of EXAMPLE 28A. Ή NMR (DMSO-ck, 300 MHz): δ 12.83 (s, 1 H), 1 1.55 (s, 1 H), 8.72 (brs, 2 H), 8.27 (s, 1 H), 7.83 (d, = 8.4 Hz, 1 H), 7.39 (d, J - 9.0 Hz, 1 H), 6.75 (s, 1 H), 6.71 (d, J = 2.4 Hz, 1 H), 6.05 (dd, J = 3.2 Hz, J = 9.0 Hz, 1 H), 3.88 (s. 3 H). 3.29 (s, 8 H). MS: 531 (M+H+).
EXAMPLE 81
7-[(3-chloropyridin-4-yl)o.xy]-5-{ f2-metho.xy-4-(piperazin- l -vl)phenyl|amino }pyrido[3.4- d]pyridazin-4(3H)-one
EXAMPLE 81 A /erf-butyl 4-(4-(7-(3-chloropyridin-4-yloxy)-4-oxo-3,4-dihydropyrido[3,4-^pyridazin-5- ylamino)-3-methoxyphenyl)piperazine-l -carboxylate The title compound was obtained following the procedure described in EXAM PLE 75 A, using 3-chloropyridin-4-ol in place of 2,6-difluorophenol. MS: 580 (M+H ).
EXAMPLE 81 B
7-[(3-chloropyridin-4-yl)oxy]-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 28B, using EXAMPLE 81A in place of EXAMPLE 28A. Ή NMR (DMSO-*, 300 MHz): δ 13.15 (s, 1 H), 1 1.55 (s, 1 H), 8.88 (s, 1 H), 8.75-8.74 (brs, 2 H), 8.56 (dd, J = 2.1 Hz, J = 7.8 Hz, 1 H), 8.26-8.21 (m, 2 H), 7.44 (s, 1 H), 6.80 (s. 1 H). 6.65 (d, J = 9.0 Hz, 1 H), 6.54 (d, J = 7.8 Hz, 1 H), 3.40 (brs, 4 H), 3.29 (brs, 4 H). MS: 480 (M+H ).
EXAMPLE 82
7-(2,3-dimethylphenoxy)-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
EXAMPLE 82A
tert-butyl 4-(4-(7-(2,3-dimethylphenoxy)-4-oxo-3,4-dihydropyrido[3,4-i3i]pyridazin-5- y lamino)-3-methoxypheny l)piperazine- 1 -carboxy late The title compound was obtained following the procedure described in EXAMPLE 76A, using 2,3-dimethylphenol in place of 2-fluorophenol. MS: 573 (M+H+).
EXAMPLE 82B
7-(2,3-dimethylphenoxy)-5-{ [2-methoxy-4-(piperazin- l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
The tide compound was obtained following the procedure described in EXAMPLE 26E, using EXAMPLE 82 A in place of EXAMPLE 26D. Ή NMR (DMSO-cfe, 300 MHz): δ 12.71 (s, 1 H), 1 1.56 (s, 1 H), 8.69 (brs, 2 H), 8.22 (s, 1 H), 7.60-7.57 (m, I H), 7.26-7.23 (m, 1 H), 6.69-6.66 (m,2 H), 6.50 (s, 1 H), 6.05-6.02 (m, 1 H), 3.87 (s, 3 H), 3.39 (brs, 8 H), 2.30 (s. 3 H), 2.03 (s, 3 H). MS: 473 (M+H+).
EXAMPLE 83
7 (3-fluoropyridin-4-yl)oxy}-5-{ [2-methoxy-4-(pipeTazm- l -yl)phenyl]arnino}pyridof ,4- d]pyridazin-4-ol
EXAMPLE 83A
tert-butyl 4-(4-((7-((3-fluoropyridin-4-yl)oxy)-4-oxo-3,4-dihydropyrido[3,4-d]pyridazin-5- yl)amino)-3-methoxyphenyl)piperazine- 1 -carboxy late A mixture of EXAMPLE 24A (200 mg, 0.41 mmol), 3-fluoropyridin-4-ol (93 mg, 0.82 mmol), copper(I) iodide (8 mg, 0.043 mmol), N,N-dimethylglycine (13 mg, 0.123 mmol) and cesium carbonate (267 mg, 0.82 mmol) in 1,4-dioxane ( 10 mL) was degassed twice with nitrogen and heated in a sealed tube at 120°C for 28 hours. After concentration, the residue was purified by flash chromatography on silica gel eluting w ith 30/ 1
dichloromethane/methanol to give the title compound. MS: 564 (Μ+Η ').
EXAMPLE 83B
7-[(3-fluoropyridin-4-yl)oxy]-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
To a solution of EXAMPLE 83A (170 mg, 0.3 mmol) in dichloromethane (20 mL) at room temperature was added trifluoroacetic acid (3 mL) and the mixture was stirred for 2 hours. The mixture was concentrated and methanol (10 mL) was added. Filtration gave the title compound. Ή NMR (OMSO-d , 300 MHz): δ 13.09 (s, 1 H), 1 1.53 (s, 1 H), 8.77-8.73 (m. 3 H). 8.50 (dd. J = 7.8. 2.4 Hz, 1 H), 8. 19 (d, J = 8.7 Hz, 1 H). 8. 19 (s, 1 H). 7.35 (s. 1 H). 6.75 (d, J = 3.2 Hz, 1 H), 6.63-6.52 (m, 2 H), 3.89 (s. 3 H), 3.37-3.15 (m, 8 H). MS: 464 (M+H*).
EXAMPLE 84
5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}-7-(2,3,4-trichlorophenoxy)pyrido[3,4- d]pyridazin-4-ol
EXAMPLE 84A
tert-butyl 4-(3-methoxy-4-(4-oxo-7-(2,3,4-trichlorophenoxy)-3,4-dihydropyridof3,4- i/]pyridazin-5-ylamino)phenyl)piperazine- l-carboxylate The title compound was obtained following the procedure described in EXAMPLE 76A, using 2,3,4-trichlorophenol in place of 2-fluorophenol. MS: 647(M+H").
EXAMPLE 84B
5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}-7-(2,3,4-trichlorophenoxy)pyrido[3,4- d]pyridazin-4-ol
The title compound was obtained following the procedure described in EXAMPLE 26E. using EXAMPLE 84 A in place of EXAMPLE 26D. Ή NMR (DMSO-^, 300 MHz): δ 12.83 (s, 1 H), 1 1.49 (s, 1 H). 8.67 (brs, 2 H), 8.27 (s. 1 H), 7.88-7.86 (m, 1 H), 7.57-7.54 (m. 1 H), 7.30-7.27 (m, 1 H), 6.72 (s, 2 H). 5.99-5.96 (m, 1 H), 3.86 (s, 3 H), 3.35 (brs, 8 H). MS: 547 (M+H+).
EXAMPLE 85 7-(2,4-dichlorophenox )-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino
d]pyridazin-4(3H)-one
EXAMPLE 85A
tert-butyl 4-(4-(7-(2,4-dichlorophenoxy)-4-oxo-3,4-dihydropyrido[3,4-d]pyrid azin-5- ylamino)-3-methoxyphenyl)piperazine-l -carboxylate
The title compound was obtained following the procedure described in EXAMPLE 62A, using 2,4-dichlorophenol in place of 2-chlorophenol.
EXAMPLE 85B
7-(2,4-dichlorophenoxy)-5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3.4- d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 2F, using EXAMPLE 85 A in place of EXAMPLE 2E. Ή NMR(DMSO-c¾, 300 MHz): δ 12.78 (s, 1 H), 1 1.51 (s, 1 H), 8.60 (s, 2 H), 8.26 (s, 1 H), 7.91 (s, 1 H), 7.61 (s, 1 H), 7.51 (d, J = 9 Hz, 1 H), 7.37 (d, = 9 Hz, 1 H), 6.70 (m, 2 H), 6.05 (d, J = 9 Hz, 1 H), 3.88 (s, 3 H), 3.30 (s, 8 H). MS: 514 (M+H+).
EXAMPLE 86
7-[(trans-4-hydroxycyclohexyl)amino]-5-{ [2-methox\ -4-(piperazin- l- yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol
EXAMPLE 86A
(/raA2.?)-4-(/er/-butyldimethylsilyloxy)cyclohexanamine
To a solution of (lr,4r)-4-aminocyclohexanol (500 mg, 4.3 mmol) and tert-buty\ chlorodimethylsilane (981 mg, 6.5 mmol) in N,N-dimethylformamide (8 mL) was added imidazole (469 mg, 7.8 mmol). The mixture was stirred at ambient temperature for 12 hours, quenched with water and extracted with ethyl acetate. The organic phase was washed with brine and concentrated to yield the title compound.
EXAMPLE 86B
/err-butyl 4-(4-(7-((ira/ilv)-4-(ier/-butyldimethylsilyloxy)cyclohexylamino)-4-oxo-3,4- dmydropyrido[3,4-(^pyridazin-5-ylamino)-3-methoxyphenyl)piperazine-l -carboxylate The title compound was obtained following the procedure described in EXAMPLE 24B, using EXAMPLE 86A m place of 2-chlorobenzenamine. MS: 680 (M+H+>
EXAMPLE 86C
7-[(trans-4-hydroxycyclohexyl)amino]-5-{ [2-methoxy-4-(piperazin- l - yl)phenyl]amino}pyrido|3,4-d]pyridazin-4-ol The title compound was obtained following the procedure described in EXAMPLE 26E, using EXAMPLE 86B in place of EXAMPLE 26D. Ή NMR (DMSO-i/6, 300 MHz): δ 12.01 (s, 1 H), 1 1.51 (s, 1 H), 8.75-8.60 (m, 3 H), 7.88 (s, 1 H), 7.3 1 (brs, 1 H), 6.76 (s. 2 H). 6.51 (d, J = 9Hz, 1 H), 5.87(s, 1 H), 3.91 (s, 3 H), 3.85 (brs, 1 H), 3.33 (brs, 8 H), 2.03- 1.91 (m, 4 H), 1.32 (brs, 4 H). MS: 466 (M+H4).
EXAMPLE 87
7-(cyclopentyloxy)-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4-d]pyridazin-
4-ol
To a solution of cyclopentanol (71 mg. 0.84 mmol) in tetrahydrofuran (10 mL) was added 60% sodium hydride (42 mg, 1.05 mmol) and the mixture was stirred at room temperature for 30 minutes. The product of EXAMPLE 24A (0.1 g, 0.21 mmol) was added and the mixture was stirred at 150°C for 24 hours. The mixture was quenched with water and extracted with tetrahydrofuran. The organic phase was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by preparative HPLC using a gradient of 10/90 to 90/10 acetronitrile in water (containing 0.1%
trifluoroacetic acid) to give the title compound. Ή NMR (DMSO-<¾, 300 MHz): δ 12.55 (s, 1 H). 1 1.60 (s, 1 H). 8.70 (s. 2 H), 8.49 (d. J = 9.0 Hz, 1 H), 8.09 (s. 1 H). 6.86(s, 1 H), 6.64 (d. J = 9.0 Hz, 1 H). 6.27 (s, 1 H), 5.40 (s, 1 H), 3.92 (s, 3 H), 3.38 (s, 4 H), 3.27 (s. 4 H), 2.01 - 1.67 (m, 8 H). MS: 438 (M+H+).
EXAMPLE 88
7-(2,6-dichlorobenzyl)-5-[(7-methoxy-l,2,3,4-tetrahydroisoquinolin-6-yl)amino]pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 88A
methyl 4-methoxyphenethylcarbamate
To a solution of 2-(4-methoxyphenyl)ethanamine (20 g. 132 mmol) in
dichloromethane (200 mL) was added sodium carbonate (28 g, 264 mmol) and methyl carbonochloridate ( 13. 1 g. 139 mmol). After stirring at ambient temperature for 4 hours, the mixture was poured into water (200 mL) and extracted with dichloromethane (2 x 200 mL). The combined organic phase was washed with brine (100 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to give the title compound. MS : 210 (M+H*).
EXAMPLE 88B
7-methoxy-3,4-dihydroisoquinolin-l(2 /)-one To polyphosphoric acid ( 150 mL) at 120°C was added slowly EXAMPLE 88A (29 g, 139 mmol). After stirring for 0.5 hours, the mixture was cooled to 50°C and poured into ice-water (300 mL). The mixture was extracted with dichloromethane (2 * 200 mL) and the combined organic layers were washed with brine (100 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to give the title compound. MS: 178 (M+H+).
EXAMPLE 88C
7-methoxy-l ,2.3.4-tetrahydroisoquinoline
To a suspension of lithium aluminum hydride (10 g, 46 mmol) in tetrahydrofuran (100 mL) at 0°C under nitrogen was added slowly a solution of EXAMPLE 88B (4.1 g, 23 mmol) in tetrahydrofuran (50 mL) over 0.5 hour and the mixture was heated to 70°C for 2 hours. After cooling to 0°C, 15% sodium hydroxide (4.9 mL) was added slowly and the mixture was filtered and washed with ethyl acetate (50 mL). The filtrate was concentrated to give the crude title compound. MS: 164 (M+H+).
EXAMPLE 88D
te/7-butyl 7-methoxy-3,4-dihydroisoquinoline-2(l/ )-carbox late To a solution of EXAMPLE 88C ( 1.88 g. 1 1.5 mmol) in dichloromethane (40 mL) was added triethylamine (2.3 g, 23 mmol) and di-/er?-butyl dicarbonate (3 g, 13.8 mmol).
After stirring at ambient temperature for 16 hours, the mixture was poured into water (50 mL) and extracted with dichloromethane (2 « 100 mL). The combined organic layers were dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel eluting with 10: 1 hexane:ethyl acetate to give the title compound. MS: 264 (M+H+).
EXAMPLE 88E
tert-butyl 7-methoxy-6-nitro-3,4-dihydroisoquinoline-2(l/ )-carboxylate
To a solution of EXAMPLE 88D (2.46 g. 9.35 mmol) in nitromethane (30 mL) at - 10°C was added acetic anhydride (5.7 g, 56.1 mmol) and concentrated nitric acid (0.88 g, 14 mmol). After stirring for 3 hours, the mixture was adjusted to pH 7 with aqueous sodium bicarbonate solution and extracted with dichloromethane (2 χ 100 mL). The combined organic layers were dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel eluting with 5: 1 hexane:ethyl acetate to give the title compound. MS: 309 (M+HT).
EXAMPLE 88F
/er/-buty] 6-amino-7-methoxy-3,4-dihydroisoquinoline-2(l /)-carbox late To a solution of EXAMPLE 88E (550 mg. 1.78 mmol) in methanol ( 10 mL) was added Raney Nickel (55 mg) and the mixture was stirred at ambient temperature under hydrogen for 16 hours. The mixture was filtered and the filtrate was concentrated to give the crude title compound. MS: 279 (M+H+).
EXAMPLE 88G
tert-butyl 6-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-c/]pyridazin-5-ylamino)-7-methoxy-3,4- dihydroisoquinoline-2( l//)-carboxylate
To a solution of EXAMPLE 7 (200 mg, 0.93 mmol) in dioxane (1 mL) was added
EXAMPLE 88F (284 mg, 1.02 mmol) and N/V-diisopropylethylamine (600 mg, 4.65 mmol) and the mixture was heated in a sealed tube at 120°C for 16 hours. After cooling to ambient temperature, the mixture was poured into water (50 mL) and extracted with dichloromethane (100 mL). The organic layer was dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel eluting with 100: 1 dichlomethane/methanol to give the title compound. MS : 458 (Μ+Ι- ).
EXAMPLE 88H
/erf-butyl 6-(7-(2.6-dichlorobenz> l)-4-oxo-3,4-dihydropyrido[3.4-i ]pyridazin-5-y lamino)-7- methoxy-3.4-dihydroisoquinoline-2( l /)-carboxylate To a solution of EXAMPLE 88G (200 mg, 0.44 mmol) in tetrahydrofuran ( 10 mL) was added 0.5M (2,6-dichlorobenzyl)zinc(II) bromide in tetrahydrofuran (8.8 mL, 4.4 mmol) and tetrakis(triphenylphosphine)palladium (46 mg, 0.04 mmol). After heating at 70°C under nitrogen for 16 hours, the mixture was cooled to ambient temperature, poured into water (50 mL) and extracted with ethyl acetate (3 χ 50 mL). The combined organic layers were dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel eluting with 1 0: 1 dichlomethane/methanol to give the title compound. M S : 582. 1 (M+rT).
EXAMPLE 881
7-(2,6-dichlorobenzyl)-5-[(7-methoxy- l,2,3,4-tetrahy(lroisoquinolin-6-yl)amino]pyrido[3,4- d]pyridazin-4(3H)-one
To EXAMPLE 88H (220 mg, 0.38 mmol) in dichloromethane (10 mL) was added 2,2,2-trifluoroacetic acid (4 mL) and the mixture was stirred at ambient temperature for 3 hours. After concentration, the residue was purified by preparative HPLC eluting with a gradient of 10/90 to 30/20 acetonitrile/water (containing 0.1% trifluoroacetic acid) to give the title compound. Ή NMR (DMSO- ,. 300 MHz): δ 12.99 (s. 1 H), 1 1.86 (s. 1 H). 9.TJ2 s; H), 8.31 (s, 1 H), 8.22 (s. 1 H), 7.60 (d. J = 7.8 Hz, 2 H). 7.41 (t. J = 8.4 Hz, 1 H), 7.05 (s, 1 H), 6.92 (s, 1 H), 4.53 (s, 2 H), 4.22 (s, 2 H), 3.89 (s, 3 H), 3.42 (br, 2 H), 2.83 (d../ = 6.0 Hz, 2 H). MS : 482. 1 (M+lT).
EXAMPLE 89 2-(2-chlorophenoxy)-4-{[2-methoxy-4-(piperazin-l-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one
EXAMPLE 89A
ter/-butyl 4-(4-((2-(2-chlorophenoxy)-5-oxo-5,6-dihydropyrido[2,3-^pyridazin-4-yl)arnino)- 3-methoxyphenyl)piperazine- l -carboxylate
A mixture of EXAMPLE 68G (0.350 g, 0.719 mmol), 2-chlorophenol (0. 139 g. 1.08 mmol), copper(I) iodide ( 13.7 mg. 0.0719 mmol), NjV-dimethylglycine (22.2 mg, 0.216 mmol) and cesium carbonate (0.468g. 1 .44 mmol) in dioxane ( 15 mL) was degassed with nitrogen and heated in a sealed tube at 120°C for 1 day. After cooling to ambient temperature, the mixture was concentrated and purified by flash chromatography on silica gel (200 - 300 mesh) eluting with 120/1 dichloromethane/methanol to give the title compound. MS: 579 (M + H+).
EXAMPLE 89B
2-(2-chlorophenoxy)-4-{ | 2-methoxy-4-(piperazin- l -yl)phenyl]amino}pyrido[2.3- d|pyridazin-5(6H)-one
To a solution of EXAMPLE 89A (99.9 mg, 0. 173 mmol) in dichloromethane (5 mL) was added trifluoroacetic acid (2 mL) and the mixture was stirred at ambient temperature for 1 hour. After concentration, the residue was purified by preparative HPLC using a gradient of 10/90 to 90/10 acetronitrile in water (containing 0. 1% trifluoroacetic acid) to give the title compound. Ή NMR (DMSO-<¾ 300 MHz): δ 12.95 (s, 1 H), 10.60 (s, 1 H), 7.92 (s, 1 H). 7.60 (dd, J = 7.8 Hz, 1.5 Hz, 1 H), 7.46 - 7.25 (m, 4 H), 6.71 (d, .7 = 2.1 Hz, 1 H), 6.58 (dd, J = 8.7 Hz, 2.1 Hz, 1 H), 6.20 (s, 1 H). 3.84 (s, 3 H), 3.18 - 3. 14 (m, 4 H), 2.93 - 2.89 (m, 4 H). MS : 479 (M + H+).
EXAMPLE 90
5-{ [2-chloro-4-(pyrrolidin- l-ylmethyl)phenyl]amino}-7-(4-fluoropiperidin-l -yl)pyrido[3,4- d]pyridazin-4-ol
EXAMPLE 90A
7-chloro-5-(2-chloro-4-(pyrrolidin-l -ylmethyl)phenylamino)pyrido[3,4-d]pyridazin-4(3H)- one
To a solution of EXAMPLE 7K (0.1 g, 0.47 mmol) and EXAMPLE 93B (0.1 g, 0.47 mmol) in butyl alcohol (3 mL) was added p-toluenesulfonic acid (16 mg, 0.093 mmol) and the mixture was stirred at 130"C overnight. The mixture was concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with eluting with 30/1 dichloromethane/methanol to give the title compound.
EXAMPLE 90B
5-{[2-chloro-4-(pyrrolidin-l-ylmethyl)pte
d]pyridazin-4-ol
A mixture of EXAMPLE 90A (50 mg, 0.13 mmol), 4-fluoropiperidine (54 mg, 0.39 mmol) and ethyl diisopropylamine (0.1 mL, 0.54 mmol) in 1 ,4-dioxane (5 mL) was stirred in a sealed tube at 130"C overnight. The mixture was concentrated and the residue was purified by preparative HPLC using a gradient of 10/90 to 90/1 acetronitrile in water (containing 0.1% trifluoroacetic acid) to give the title compound. Ή NMR (DMSO-c , 300 MHz): δ 12.44 (s, 1 H), 1 1.86 (s, 1 H), 10.46 (s, 2 H), 8.69 (d, J = 8.4 Hz, 1 H), 8.04 (s, 1 H), 7.88 (s, 1 H), 7.57 (d, J = 8.4 Hz, 1 H), 6.55 (s, 1 H), 5.06-4.91 (m, 1 H), 4.33 (d, J = 5.4 Hz, 2 H), 3.85-3.63 (m, 4 H), 3.34-3.36 (m, 2 H), 3.19-3.16 (m, 2 H), 2.05- 1.81 (m, 8 H). MS: 458 (M+H+).
EXAMPLE 91
2-(2-chlorobenzyl)-4-[(6-methoxy-l ,2,3,4-tetrahydroisoquinolin-7-yl)amino]pyrido[2,3- d]pyridazin-5-ol
EXAMPLE 91A
ieri-butyl 7-(7-chloro-4-oxo-3.4-dihydropyrido[3.4-i |pyridazin-5-vlamino)-6-methoxy-3,4- dihydroisoquinoline-2( l )-carboxylate
The title compound was obtained following the procedure described in EXAMPLE 24A, using EXAMPLE 74F in place of EXAMPLE 1G. MS: 458 (M+H+).
EXAMPLE 91 B
ier/-butyl 7-(7-(2-chlorobenzyl)-4-oxo-3,4-dihydropyrido[3,4-i/]pyridazin-5-ylamino)-6- methoxy -3 ,4-dihy droisoquinoline-2( l /)-carboxy late The title compound was obtained following the procedure described in EXAMPLE 92F, using EXAMPLE 91 A in place of EXAMPLE 92E. MS: 548 (M+H+).
EXAMPLE 91C
2-(2-chlorobenzyl)-4-[(6-methoxy-l ,2,3,4-tetrahydroisoquinolin-7-yl)amino]pyrido[2,3- d]pyridaz†n-5-ol
The title compound was obtained following the procedure described in EXAMPLE 34B, using EXAMPLE 91 B in place of EXAMPLE 34A. Ή NMR (DMSO-rf& 300 MHz): δ 13.28 (s. 1 H), 1 1.33 (s. 1 H). 8.50 (s. 2 H), 8.37 (s. 1 H). 7.55-7.52 (m. 1 H), 7.43-7.35 (m, 3 H), 7.23 (s, 1 H), 7.03 (s, 1 H), 6.73 (s, 1 H), 4.31 (s, 2 H), 4.15 (m, 2 H), 3.78 (s, 3 H), 3.40- 3.38 (m. 2 H), 3.06-3.02 (m, 2 H).
EXAMPLE 92
2-(2-chlorobenz l)-4- { [2-methoxy -4-(piperazin- 1 -y lmethy l)pheny l]amino } py rido[2,3- d]pyridazin-5(6H)-one
EXAMPLE 92A
3-methoxy-4-nitrobenzoyl chloride
To a solution of 3-methoxy-4-nitrobenzoic acid (5.7 g, 30 mmol) in dichloromethane (100 mL) and N, N-dimethylformamide (5 mL) at 0°C was added slowly oxalyl chloride (5.08 mL, 60 mmol). After stirring for 2 hours, the mixture was concentrated and the residue used without further purification.
EXAMPLE 92B
ter/-butyl 4-(3-methoxy-4-nitrobenzoyl)piperazine- 1-carboxylate To a solution of EXAMPLE 92A (13 mmol) in dichloromethane (100 mL) at 0°C was added slowly tert-butyl piperazine-l-carboxylate (1.06 g , 13 mmol) and triethylamine (3.6 mL). After stirring for 2 hours, water was added slowly and the mixture was extracted with dichloromethane (3 x 200 mL). The combined organic phase was washed with brine, dried over sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 100/1 dichloromethane/methanol to provide the title compound. MS : 388 (M+tf ).
EXAMPLE 92C
ier/-butyl 4-(4-amino-3-methoxybenzoyl)piperazine-l -carboxylate To a solution of EXAMPLE 92B (3 g, 1 1 mmol) in methanol (100 mL) was added Raney Ni (300 mg) and the mixture was stirred under hydrogen for 14 hours. The catalyst was filtered off and the filtrate was concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 100/1 dichloromethane/methanol to provide the title compound. MS: 336 (M+H* .
EXAMPLE 92D
tert-butyl 4-(4-amino-3-methoxybenzyl)piperazine-l -carboxylate The title compound was obtained following the procedure described in EXAMPLE 93B, using EXAMPLE 92C in place of EXAMPLE 93A.
EXAMPLE 92E
ieri-butyl 4-(4-((2-chloro-5-oxo-5,6-dihydropyrido[2,3-rf]pyridazin-4-yl)amino)-3- methoxybenzy l)piperazine- 1 -carboxylate A mixture of EXAMPLE 68F (0.31 1 g, 1.44 mmol), EXAMPLE 92D (0.419 g, 1.31 mmol), NN-diisopropylethylamine (0.338 g, 2.62 mmol) and dioxane (10 mL) was heated in a sealed tube at 120 °C for 1 day. After cooling to ambient temperature, the mixture was concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 50/1 dichloromethane/methanol to give the title compound. MS: 501 (M + H+).
EXAMPLE 92F
fm-butyl 4-(4-((2-(2-chlorobenzyl)-5-oxo-5,6-dihydropyrido[2,3-d]pyridazin-4-yl)amino)-3- methoxybenzyl)piperazine-l -carboxylate
A mixture of EXAMPLE 92E (0.150 g, 0.300 mmol), 0.5M (2-chlorobenzyl)zinc(II) bromide in tetrahydrofuran (3.0 mL, 1.50 mmol), tetrakis(triphenylphosphine)palladium (17.3 mg, 0.015 mmol) and tetrahydrofuran (5 mL) was degassed with nitrogen 6 times and heated at 72°C for 15 hours. After cooling to ambient temperature, the mixture was diluted with saturated aqueous ammonium chloride (10 mL) and extracted with dichloromethane (3 x 20 mL). The organic phase was dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 100/1 dichloromethane/methanol to give the title compound. MS: 591 (M + H+).
EXAMPLE 92G
2-(2-chlorobenzyl)-4-{[2-methoxy-4-(piperazin-l -ylmethyl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one
To a solution of EXAMPLE 92F (0.140 g, 0.237 mmol) in dichloromethane (5 mL) was added trifluoroacetic acid (3 mL) and the mixture was stirred at ambient temperature for 2 hours. After concentration, the residue was purified by preparative HPLC using a gradient of 10/90 to 80/20 acetronitrile in water (containing 0.1 % trifluoroacetic acid) to give the title compound. Ή NMR (DM S0-< 300 MHz): δ 12.87 (s, 1 H), 10.84 (s. 1 H), 8.17 (s, 1 H). 7.49 - 7.46 (m, 1 H), 7.39 - 7.28 (m, 5 H), 7.06 (s, 1 H), 6.90 (d, J = 8 1 Hz, 1 H), 6.70 (s, 1 H), 4.20 (s, 2 H), 3.79 (s, 3 H). 3.53 (s, 2 H), 3.36 (m, 4 H), 3.00 (m, 4 H). MS: 491 (M + H+).
EXAMPLE 93
5 -{ [2-chloro-4-(py rrolidin- 1 -y lmethy l)pheny 1] amino } -7- f(c^clopTopylmethyl)amino}pyrido[3,4-d]pyridazin-4-ol
EXAMPLE 93A
(4-amino-3-chlorophenyl)(pyrrolidin- l -yl)methanone A suspension of 4-amino-3-chlorobenzoic acid ( 1 g, 5.8 mmol), pyrrolidine (705 mg, 8.7 mmol), l -ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride (4.5 g, 23.2 mmol), 1 - hydroxybenzotrizole (3.1 g, 23.2 mmol) and N,N-diisoproylethylamine (6 g, 46.4 mmol) in dichloromethane (100 mL) was stirred at ambient temperature for 4 hours. The mixture was washed with water (50 mL), dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel (200-300 mesh), eluting with 1/1 petroleum ether/ethyl acetate to give the title compound. MS: 225 (M + H+).
EXAMPLE 93B
2-chloro-4-(pyrrolidin-l -ylmethyl)benzenamine To a solution of EXAMPLE 93 A (1.2 g, 5.3 mmol) in tetrahydrofuran (50 mL) was added dropwise 1M borane-tetrahydrofuran complex (26.5 mL, 26.5 mmol) at 0°C and the mixture was stirred at 0°C for 20 minutes and heated at 70°C for 4 hours. The reaction mixture was quenched with methanol and concentrated. The residue was dissolved in tetrahydrofuran (50 mL) and /V,N,N,/V"-tetramethylethylenediamine (2 mL) and the mixture was stirred at ambient temperature for 4 hours. After concentration, the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 1/1 petroleum ether/ethyl acetate to give the title compound. MS: 21 1 (M + H+).
EXAMPLE 93C
7-chloro-5-(2-chloro-4-^yrrolidin-l -ylmethyl)phenylamino)pyrido[3,4-(/]pyridazin-4(3 /)- one
To a solution of EXAMPLE 7K (5 g, 23.1 mmol) and EXAMPLE 93B (0.4 g, 2.3 mmol) in butyl alcohol (100 mL) was added p-toluenesulfonic acid (0.4 g, 2.3 mmol) and the mixture was heated at 130T for 20 hours. After cooling to ambient temperature, the mixture was concentrated and purified by flash chromatography eluting with 80: 1
dichloromethane:methanol to give the title compound. MS: 390 (M+H ).
EXAMPLE 93D
5-{ [2-chloro-4-(pyrrolidin- l -ylmethyl)phenyl]amino}-7- [(cy clopropy lmethy l)amino] py rido [3 ,4-d] py ridazin-4-ol To a solution of EXAMPLE 93C (50 mg, 0.13 mmol) and cyclopropylmethanamine (50 mg, 0.7 mmol) in dioxane (5 mL) was added Ν,Ν-dimethylethanamine (100 mg, 1.1 mmol) and the mixture was stirred at 100 C for 15 hours. After cooling to ambient temperature, the mixture was concentrated and purified by flash chromatography on silicate! eluting with 80: 1 dichloromethane/methanol to give the title compound. Ή NMR (DMSO- db, 300 MHz): δ 12.25 (s, 1 H), 12.00 (s. 1 H), 10.40 (brs, 1 H), 9.03 (brs, 1 H). 8.01 (s, 1 H). 7.60 (s. 2 H), 7.58-7.55 (m, 1 H), 6.13 (m. 1 H), 4.35-4.33 (m. 2 H). 3.39-3.10 (m, 6 H), 2.05- 1.89 (m, 4 H), 1.15 (brs, 1 H),0.53-0.51 (m, 2 H), 0.29-0.28 (m, 2 H). MS: 425 (M+rT). EXAMPLE 94
2-(2-chlorobenzyl)-4-{[2-methoxy-4-(^
d]pyridazin-5-ol
EXAMPLE 94A
(4-amino-3-methoxyphenyl)(morpholino)methanone
The title compound was obtained following the procedure as described in EXAMPLE 93 A, using 4-amino-3-methoxybenzoic acid in place of 4-amino-3-chlorobenzoic acid and morpholine in place of pyrrolidine.
EXAMPLE 94B
2-methoxy -4-(morpholinomethy l)benzenamine
The title compound was obtained following the procedure described in EXAMPLE 93B, using EXAMPLE 94A in place of EXAMPLE 93 A.
EXAMPLE 94C
2-chloro-4-((2-methoxy-4-(mo holinomethyl)phenyl)amino)pyrido[2,3-d]pyridazin-5(6H)- one
To a solution of EXAMPLE 68F (246 mg. 1. 15 mmol). EXAMPLE 94B (280 mg. 1 .26 mmol) in 1.4-dioxane (10 mL) was added N-ethyl-N-isopropylpropan-2-amine (296 mg, 2.3 mmol) and the mixture was heated in a sealed tube at 120°C overnight. After concentration, the residue was purifed by by flash chromatography on silica gel eluting with 1/1 petroleum ether/ethyl acetate to give the title compound. MS: 402 (M+H+).
EXAMPLE 94D
2-(2-chlorobenzyl)-4-{[2-methoxy-4-(morpholin-4-ylmethyl)phenyl]amino}pyrido[2,3- d]pyridazin-5-ol
To a solution of EXAMPLE 94C (160 mg, 0.4 mmol) in tetrahydrofuran (20 mL) under nitrogen was added tetrakis(triphenylphosphine) palladium(O) (23 mg. 0.02 mmol), followed by 0.5N (2-chlorobenz l)zinc(II) bromide in tetrah drofuran (4 mL. 2 mmol) and the mixture was stirred at 70°C overnight. After concentration, the residue was purifed by flash chromatography on silica gel eluting with 1 /1 petroleum ether/ethyl acetate to give the title compound. Ή NMR (CD3OD, 300 MHz): δ 8.14 (s, 1 H), 7.42-7.23 (m, 5 H). 7.13 (s, 1 H), 6.95 (d, J = 8.7 Hz, 1 H), 6.67 (s, 1 H), 4.23 (s, 2 H), 3.83 (brs, 9 H), 2.83 (brs, 4 H). MS: 492 (M+H ).
EXAMPLE 95
7-(2-chlorophenoxy)-5-{[2-ethoxy-4-(pyrrolidin-l -ylmethyl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one EXAMPLE 95A
(3-hydroxy-4-nitropheny l)(pyrrolidin- 1 - /)iriethanone A suspension of 3-hydroxy-4-nitrobenzoic acid (5.4 g, 30 mmol), pyrrolidine (2.6 g, 3.6 mmol), triethylamine (9 g, 90 mmol) and Ν,Ν,Ν',Ν'-tetramethyluronium
hexafluorophosphate (17 g, 45 mmol) in dichloromethane (150 mL) was stirred at ambient temperature for 17 hours. The mixture was washed with water (3 x 50 mL), concentrated and purified by flash chromatography on silica gel eluting with 1/1 petroleum eter/ethyl acetate to give the title compound. MS: 237 (M+H+).
EXAMPLE 95B
(3 -ethoxy-4-nitropheny l)(py rrolidin- 1 -v methanone
To a mixture of EXAMPLE 95 A (1 19 mg, 0.5 mmol) and potassium carbonate ( 138 mg, 1 mmol) in acetonitrile (10 mL) at 0°C was added bromoethane ( 1 mL) dropwise and the mixture was stirred at 0°C for 0.5 hour and at ambient temperature for 16 hours. The mixture was diluted with water (20 mL) and extracted with ethyl acetate (100 mL). The organic layer was concentrated and purified by flash chromatography on silica gel eluting with 1/1 petroleum ether/ethyl acetate to give the title compound. MS: 265 (M+H+).
EXAMPLE 95C
(4-amino-3-ethoxyphenyl)(pyrrolidin- l -_v )methanone A suspension of EXAMPLE 95B ( 1 . 1 g, crude) and Raney Nickel (0.4 g) was stirred under hydrogen at ambient temperature for 15 hours. The mixture was filtered and the filtrate was concentrated to give the crude title compound. MS: 235 (M+rT).
EXAMPLE 95D
2-ethoxy-4-(pyrrolidin-l -ylmethyl)benzenamine To a solution of EXAMPLE 95C (1.05 g, 4.5 mmol) in tetrahydrofuran (50 mL) at 0°C was added 1 M borane-tetrahydrofuran complex (22 mL, 22 mmol) and the mixture was stirred at 0°C for 3 hours and at ambient temperature for 3 hours. The mixture was quenched with methanol, concentrated and purified by flash chromatography on silica gel eluting with 3/1 petroleum ether/ethyl acetate to the title compound. MS: 221 (M+H+).
EXAMPLE 95E
7-cMcoO-5-(2-ethoxy-4-(py rrolidin- l-ylrr^^
one
A solution of EXAMPLE 95D (200 mg, 0.9 mmol), EXAMPLE 7K (200 mg, 0.93 mmol) and N,N-diisopropyethylamine (2 mL) in 1 ,4-dioxane (30 mL) was heated in a sealed- tube at 120°C for 1.5 hours. The mixture was concentrated and purified by flash chromatography on silica gel eluting with 20/1 dichloromethane/methane to give the title compound. MS: 400 (M+H+).
EXAMPLE 95F
7-(2-chlorophenoxy )-5- { [2-ethoxy-4-(py rrolidin- 1 -y lmethy l)pheny l]amino }py rido[3,4- d]pyridazin-4(3H)-one
A mixture of EXAMPLE 95E (150 mg, 0.38 mmol), 2-chlorophenol (65 mg, 0.5 mmol), dimethylglycine (10 mg, 0.1 mmol), copper(I) iodide (7.6 mg, 0.04 mmol) and cesium carbonate (248 mg, 0.76 mmol) in 1 ,4-dioxane (20 mL) was heated in a sealed-tube at 120°C for 15 hours. The mixture was concentrated and purified by flash chromatography on silica gel eluting with 20/1 dichloromethane/methane to give the title compound. Ή NMR (DMS0-i 300 MHz): δ 12.92 (s, 1 H), 1 1.95 (s, 1 H), 10.74 (s. 1 H). 8.30 (s. 1 H). 7.73- 7.70 (d, J == 9 Hz, 1 H). 7.56-7.48 (m. 4 H), 7.35 (s, 1 H), 4.03 (s, 2 H). 6.79 (s. 1 H). 6.63- 6.60 (d, ./ = 9 Hz, 1 H ), 4.23-4.15 (m, 4 H), 3.33-3.30 (m, 2 H), 3.04-3.00 (m, 2 H), 2.02- 1.90 (m, 4 H), 1.47 (t, 3 H). MS: 492 (M+LT).
EXAMPLE 96
5-{ [2-chloro-4-(py rrolidin- 1-y lmethy l)phenyl]amino}-7-(4-hydroxypiperidin-l - y l)py rido [3 ,4-d]py ridazin-4(3 H)-one
To a solution of EXAMPLE 93C (39 mg, 0.1 mmol), piperidin-4-ol (16 mg, 0.15 mmol) in 1 ,4-dioxane (4 mL) was added N-ethyl-N-isopropyl propan -2-amine (25 mg, 0.2 mmol) and the mixture was heated in a sealed tube at 120°C overnight. After concentration, the residue was purified by preparative HPLC using a gradient of 10/90 to 80/20 acetronitrile in water (containing 0.1 % trifluoroacetic acid) to give the title compound. Ή NMR (DMSO- d6, 300 MHz) δ 12.38 (s. 1 H), 1 1.83 (s, 1 H), 10.86 (s. 1 H), 6.69 (d, J = 8.4 Hz, 1 H), 8.01 (s, 1 H), 7.84 (s, 1 H), 7.59 (d, J = 6.9 Hz, 1 H), 6.52 (s, 1 H), 4.84 (d, J = 4.2 Hz, 2 H), 4.09- 4.04 (brs, 2 H), 3.82 (brs, 1 H), 3.36 (brs, 4 H), 3.09 (brs, 2 H), 2.01- 1.79 (m, 6 H), 1.46-1.43 (m, 2 H). MS: 455 (M+H+).
EXAMPLE 97
5-{ [2-chloro-4-(py rrolidin- 1-y lmethyl)phenyl]amino}-7-(3-hydroxyazetidin- 1 -y l)pyrido[3,4- d]pyridazin-4(3H)-one
To a solution of EXAMPLE 93C (50 mg, 0.13 mmol) and azetidin-3-ol ( 14 mg, 0 T9 mmol) in 1 ,4-dioxane (4 mL) was added N-ethyl-N-isopropyl propan-2-amine (34 mg, 0.26 mmol) and the mixture was heated in a sealed tube at 130°C for 30 hours. After
concentration, the residue was purified by preparative HPLC using a gradient of 10/90 to 90/10 acetronitrile in water (containing 0.1% trifluoroacetic acid) to give the title compound. Ή NMR (CD3OD, 300 MHz): δ 1 1.84 (s, 1 H), 9.08 (d, J = 8.4 Hz, 1 H), 7.89 (s, 1 H), 7.63 (s, 1 H), 7.43 (d, J = 8.4 Hz, 1 H), 5.87 (s, 1 H), 4.76 (brs, 1 H), 4.41 -4.29 (brs, 4 H), 3.96- 3.92 (m, 2 H), 3.33 (brs, 4 H), 2.10 (brs, 6 H). MS: 427 (M+H+).
EXAMPLE 98
7-(2-chlorophenoxy)-5-{[2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[3,4-d]py
4-ol
EXAMPLE 98A
tert-butyl 4-(4-(7-(2-chlorophenoxy)-4-oxo-3,4-dihydropyrido[3.4-d]pyridazin-5- ylamino)- 3-methoxyphenyl)piperidine-l -carbox late
The title compound was obtained following the procedure described in EXAMPLE 62A, using EXAMPLE 99C in place of EXAMPLE 24A.
EXAMPLE 98B
7-(2-chlorophenoxy)-5-{[2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[3,4-d]pyridazin-
4-ol
The title compound was obtained following the procedure described in EXAMPLE 2F, using EXAMPLE 98A in place of EXAMPLE 2E. Ή NMR (DMSO- ¾, 300 MHz): δ 12.88 (s. 1 H), 1 1.88 (s, 1 H), 8.31 (s, 1 H), 7.73 (s, 1 H), 7.60-7.49 (m, 4 H), 7.14 (s, 1 H), 6.81 (s, 1 H), 6.59 (d, .7 = 6.0 Hz, 1 H), 3.89 (s, 3 H), 3.47-3.37 (m, 4 H), 1 .91 - 1.80 (m. 4 H). MS: 479(M+H+).
EXAMPLE 99
7-[(cyclopropylmethyl)amino]-5-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
EXAMPLE 99A
itri-buty l 4-(4-amino-3-methoxyphenyl)-5,6-dihvdropyridine- l (2/J)-carbox late A mixture of 4-bromo-2-methoxybenzenamine ( 1.21 g, 6.0 mmol), tert-butyl 4- (3,3,4,4-tetramethylborolan-l-yl)-5,6-dihydropyridine- l (2/ )-carboxylate ( 1 .95 g. 6.3 mmol), sodium carbonate (1.91 g, 18 mmol) and 1, 1 '- bis(diphenylphosphino)ferrocene]dichloropalladium(II) (0.22 g, 0.3 mmol) in dioxane (25 mL) and water (5 mL) was degassed with nitrogen and heated at 90°C for 1 hours. After coohng to ambient temperature, the mixture was filtered, concentrated and purified by flash" chromatography eluting with 200: 1 dichloromethane/methanol to give the title compound.
MS: 305 (M+rf).
EXAMPLE 99B
/er/-butyl 4-(4-ammo-3-methoxyphenyl)piperidine- l -carbo.xylate To a mixture of 10% palladium on carbon (0.1 g) in methanol (30 mL) was added EXAMPLE 99A (0.8 g, 2.6 mmol) and the mixture was stirred at ambient temperature under hydrogen for 8 hours. The mixture was filtered and concentrated to give the title compound. MS: 307 (M+rf).
EXAMPLE 99C
ieri-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-c/)pyridazin-5-ylamino)-3- methoxyphenyl)piperidine- l-carboxylate
The title compound was obtained following the procedure described in EXAMPLE 26C, using EXAMPLE 99B in place of EXAMPLE 26B. MS: 486 (M+hT).
EXAMPLE 99D
iert-butyl 4-(4-(7-(cyclopropylmethylamino)-4-oxo-3,4-dihydropyrido[3,4-c/]pyridazin-5- ylamino)-3-methoxypheny l)piperidine- 1 -carboxy late To a solution of EXAMPLE 99C (100 mg, 0.2 mmol) and cyclopropylmethanamine (50 mg, 0.7 mmol) in dioxane (6 mL) was added N,N-dimethylethanamine (100 mg, 1.1 mmol) and the mixture was stirred at 100°C for 15 hours. After cooling to ambient temperature, the mixture was concentrated and purified by flash chromatography on silica gel eluting with 80/1 dichloromethane/methanol to give the title compound. MS: 521 (M+lf^.
EXAMPLE 99E
7-[(cyclopropylmethyl)amino]-5-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol
The title compound was obtained following the procedure described in EXAMPLE 26E, using EXAMPLE 99D in place of EXAMPLE 26D. Ή NMR (CD3OD, 300 MHz): δ 8 02 (s, 1 H), 7. 18-7.16 (s. 1 H). 7.08-7.05 (m. 2 H). 3.96 (s, 3 H), 3.58-3.54 (m, 2 H), 3.23- 3.15 (m, 5 H), 2. 18-2.01 (m. 4 H). 1 .47-1.45 (m. 1 H). 0.63-0.61 (m. 2 H), 0.36-0.32 (m, 2 H). MS: 421 (M+H+).
EXAMPLE 100
2-(2-chlorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3-d]pyridazin-
5(6H)-one
EXAMPLE 100A
teff-butyl 4-(4-(2-(2-chlorobenzyl)-5-oxo-5,6-dmydropyrido[3,2-^pyridazin-4-yTa noJ-3^ methoxypheny l)piperidine- 1 -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 101 B, using (2-chlorobenzyl)zinc(II) bromide in place of (2.6-dichlorobenzy l)zinc(II) bromide. MS : 576 (M+tT). EXAMPLE 100B
2-(2-chlorobenzyl)-4-{ [2-methoxy-4-fciperidm-4-yl)phenyl]am
5(6H)-one
The title compound was obtained following the procedure described in EXAMPLE 26E, using EXAMPLE 100A in place of EXAMPLE 26D. Ή NMR (CD3OD, 300 MHz): δ 8.34 (s, 1 H), 7.48 - 7.25 (m, 5 H), 7.01 (s, 1 H), 6.93 (d, J = 7.8 Hz, 1 H), 6.31 (s, 1 H), 4.35 (s, 2 H), 3.78 (s, 3 H), 3.57 - 3.53 (m, 2 H), 3.22 - 3.14 (m, 2 H), 3.02 - 2.95 (m, 1 H), 2.08- 1 .90 (m, 4 H). MS: 476 (M+H").
EXAMPLE 101
2-(2,6-dichlorobenzyl)-4-{[2-methoxy-4-(piperidin-4-yl)phenyl]amino }pyrido[2,3- d]pyridazin-5(6H)-one
EXAMPLE 101 A
terf-butyl 4-(4-((2-chloro-5-oxo-5,6-dihydropyrido[2,3-i/|pyridazm-4-yl)amino)-3- methoxyphenyl)piperidine-l-carboxylate
A mixture of EXAMPLE 68F (0.505 g, 2.34 mmol), EXAMPLE 99B (0.651 g, 2.13 mmol), jVN-diisopropylethylamine (0.550 g, 4.26 mmol) and dioxane (20 mL) was heated in a sealed tube at 130°C for 18 hours. After cooling to ambient temperature, the mixture was concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 80/1 dichloromethane/methanol to give the title compound. MS: 486 (M + H").
EXAMPLE 10 I B
/er/-butyl 4-(4-((2-(2,6-dichlorobenzyl)-5-oxo-5,6-dihydropyrido[2,3-i/)pyridazin-4- yl)amino)-3-methoxyphenyl)piperidine-l -carboxylate A mixture of EXAMPLE 101 A (0.100 g, 0.206 mmol), 0.5M (2,6- dichlorobenzyl)zinc(II) bromide in tetrahydrofuran (4.2 mL. 2.1 mmol),
tetrakis(triphenylphosphine)palladium (23.8 mg, 0.0206 mmol) in tetrahydrofuran (3 mL) was degassed with nitrogen and heated in a sealed tube at 80°C for 15 hours. After cooling to ambient temperature, the mixture was quenched with saturated aqueous ammonium chloride solution (10 mL) and extracted with dichloromethane (3 x 20 mL). The organic phase was dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 50/1 dichloromethane/methanol to give the title compound. MS: 610 (M + H+).
EXAMPLE l OlC
2-(2,6-dichlorobenzyl)-4-{[2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one To a solution of EXAMPLE 101 B (0.126 g, 0.206 mmol) in 5 mL dichloromethane was added trifluoroacetic acid (3 mL) and the mixture was stirred at ambient temperature for 1 hour. After concentration, the residue was purified by preparative HPLC using a gradient of 10/90 to 90/10 acetronitrile in water (containing 0.1% trifluoroacetic acid) to give the title compound as a solid trifluoroacetate salt. Ή NMR (DMSO-<¾, 300 MHz): δ 12.85 (s, 1 H), 10.70 (s, 1 H), 8.08 (s, 1 H), 7.49 (d, J = 7.8 Hz, 2 H), 7.36 - 7.30 (m, 1 H), 7.18 (d, J = 8.1 Hz, 1 H), 6.92 (s, 1 H), 6.76 (d, J = 8.1 Hz, 1 H), 6.45 (s, 1 H), 4.37 (s, 2 H), 3.75 (s, 3 H), 3.10 - 3.05 (m, 2 H), 2.67 - 2.59 (m, 3 H), 1.74 - 1.48 (m, 4 H). MS: 510 (M + H .
EXAMPLE 102
4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}-2-[2-(morpholin-4-yl)ethyl|pyrido|2,3- d]pyridazin-5(6H)-one
EXAMPLE 102A
/e -/-butyl 4-(3-methoxy-4-(5-oxo-2-vinyl-5,6-dihydropyrido[3,2-o]pyridazin-4- y lamino)pheny l)piperidine- 1 -carboxy late
To a solution of EXAMPLE 101A (200 mg, 0.41 mmol) in dioxane (10 mL) was added tributyl(vinyl)stannane (196 mg, 0.62 mmol) and
tetrakis(triphenylphosphine)palladium (47 mg, 0.041 mmol). After heating at 100°C for 5 hours, the mixture was cooled to ambient temperature, concentrated and purified by flash chromatography on silica gel eluting with 100: 1 dichloromethane: methanol to give the title compound. MS: 478 (M+H+).
EXAMPLE 102B
ier/-butyl 4-(3-methoxy-4-(2-(2-mo^holinoethyl)-5-oxo-5,6-dihydropyrido[3,2-i/]pyridazin- 4-ylamino)phenyl)piperidine-l-carboxylate
To a solution of EXAMPLE 102A (120 mg, 0.25 mmol) in methanol (10 mL) were added acetic acid (300 mg, 5 mmol) and morpholine (109 mg, 1.26 mmol). After heating at 65°C for 16 hours, the mixture was cooled to ambient temperature and concentrated to give the crude title compound. MS: 565 (M+H+).
EXAMPLE 102C
4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}-2-[2-(morpholin-4-yl)ethyl]pyrido[2,3- dJpyridazin-5(6H)-one
To a solution of EXAMPLE 102B (0.25 mmol) in dichloromethane (12 mL) was added 2,2,2-trifluoroacetic acid (3 mL) and the mixture was stirred at ambient temperature for 5 hours. After concentration, the residue was purified by preparative HPLC eluting with a gradient of 10/90 to 30/20 acetonitrile/water (containing 0.1 % trifluoroacetic acid) to afford the title compound which was converted into the hydrochloride salt with I N aqueous hydrochloric acid. Ή NMR (DMSO-ek, 300 MHz): δ 13.2 (s, 1 H), 1 1.3 (s, 1 H), 9.04 (br, 2 H), 8.36 (s, 1 H), 7.56 (d, J = 8.1 Hz. 1 H), 7.09-6.94 (m, 3 H), 3.92 (br, 7 H), 3.53-3.34 (m, 10 H), 3.03-2.93 (br. 3 H), 2.00 (br, 4 H). MS: 465.2 (Μ+Η' ).
EXAMPLE 103
7-(2-chlorophenoxy)-5-{ [5-(piperazin-l-yl)pyridin-2-yl]amino}pyrido[3,4-d]pyridazin-
4(3H)-one
EXAMPLE 103 A
5 -fluoro-2-nitropy ridine
To concentrated sulfuric acid (6 mL) at 0°C was added dropwise 30% aqueous hydrogen peroxide (2.5 mL). To the mixture was added a pre-cooled solution of 5- fluoropyridin-2-amine (1 g, 8.9 mmol) in concentrated sulfuric acid (6 mL). The mixture was stirred at ambient temperature for 16 hours, poured into ice-water and extracted with ethy l acetate. The combined organic phase was washed with brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 98/2 dichloromethane/methanol to give the title compound. MS: 143 (Μ+Ι-Γ).
EXAMPLE 103B
ter/-butyl 4-(6-nitropyridin-3-yl)piperazine-l -carboxylate A mixture of EXAMPLE 103A (3.84 g, 27 mmol), tert-butyl piperazine-l -carboxylate (6.04 g, 2.4 mmol) and triethylamine (8.20, 81 mmol) in toluene (150 mL) was heated at 100"C for 16 hours. The mixture was concentrated and the residue was washed with petroleum ether and dried under vacuum to give the title compound. MS: 309 (M+H+).
EXAMPLE 103C
ierf-butyl 4-(6-aminopyridin-3-yl)piperazine-l -carboxy late To a suspension of EXAMPLE 103B (4.5 g, 14.6 mmol) in methanol (100 mL) was added Raney -Nickel (450 mg) and the mixture was stirred at ambient temperature under hydrogen for 4 hours. The catalyst was filtered off and the filtrate was concentrated to give the title compound, which was used in the next step without further purification.
EXAMPLE 103D
ieri-butyl 4-(6-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-c/]pyridazin-5-ylamino)pyridin-3- y l)piperazine- 1 -carboxylate
The title compound was obtained following the procedure described in EXAMPLE 57E, using EXAMPLE 103C in place of EXAMPLE 57D. MS: 458 (M+H+). EXAMPLE 103E
fer/-butyl 4-(6-(7-(2-chlorophenoxy)-4-oxo-3,4-dihydropyrido[3,4-i^pyridazin-5- ylamino)pyridin-3-yl)piperazine-l -carboxylate The title compound was obtained following the procedure described in EXAMPLE 75 A, using EXAMPLE 103D in place of EXAMPLE 24A and 2-chlorophenol in place of 2,6- difluorophenol. MS: 550 (M+H+).
EXAMPLE 103F
7-(2-chlorophenoxy)-5-{[5-(piperazin- l -yl)pyridin-2-yl]amino}pyrido[3,4-d]pyridazin-
4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE
28B, using EXAMPLE 103 E in place of EXAMPLE 28A. Ή NMR (CD3OD. 300MHz): δ 8.29 (s, 1 H), 7.90 (dd, J = 2.7 Hz, J = 9.6 Hz, 1 H), 7.76-7.69 (m, 2 H), 7.62-7.46 (m, 4 H), 6.94 (s, 1 H), 3.54-3.52 (m, 4 H), 3.46-3.44 (m, 4 H). MS: 450 (M+H+).
EXAMPLE 104
2-(2-cyclopropylethyl)-4-{[2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one
EXAMPLE 104 A
(£)-tert-butyl 4-(4-(2-(2-cyclopropylvinyl)-5-oxo-5.6-dihydropyrido[3,2-i/|pyridazin-4- ylamino)-3-methoxyphenyl)piperidine- l-carboxylate To a mixture EXAMPLE 1 1 A (200 mg, 0.41 mmol) in dioxane (20 mL) and water (5 mL) were added (£)-2-(2-cyclopropylvinyl)-4,4,5,5-tetramethyl- l ,3,2-dioxaborolane ( 160 mg, 0.82 mmol), l, l '-bis(diphenylphosphino)ferrocene palladium(II) dichloride (30 mg, 0.041 mmol) and potassium carbonate (170 mg, 1.23 mmol). After heating at 100°C under nitrogen for 4 hours, the mixture was cooled to ambient temperature, poured into water (50 mL) and extracted with dichloromethane (2 * 50 mL). The combined organic layers were dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash
chromatography on silica gel eluting with 100: 1 dichloromethane/methanol to give the title compound. MS: 518 (M+H+).
EXAMPLE 104B
ter/-butyl 4-(4-(2-(2-cyclopropylethyI)-5-oxo-5,6-dihydropyrido[3,2-d]pyridazin-4-ylamino)-
3-methoxyphenyl)piperidine-l -carboxylate
To a solution of EXAMPLE 104A (200 mg, 0.39 mmol) in methanol (20 mL) was added Raney Nickel (50 mg) and the mixture was stirred at ambient temperature under hydrogen for 1 hour. The mixture was filtered and the filtrate was concentrated to give the crude title compound. MS: 520 (M+rT).
EXAMPLE 104C
2-(2-cyclopropylethyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one
To a solution of EXAMPLE 104B (202 mg, 0.39 mmol) in dichloromethane (12 mL) was added 2,2,2-trifluoroacetic acid (3 mL). After stirring at ambient temperature for 5 hours, the mixture was concentrated and the residue was purified by preparative HPLC eluting with a gradient of 10/90 to 30/20 acetonitrile/water (containing 0. 1 % trifluoroacetic acid) to give the title compound which was converted into the hydrochloride salt with IN aqueous hydrochloric acid. Ή NMR (DMS0-c 300 MHz): δ 13.70 (s, 1 H), 1 1.73 (s, 1 H), 9.24 (br, 2 H), 8.68 (s, 1 H), 7.53 (d, J = 8.1 Hz, 1 H), 7.13 (s, 1 H), 7.00-6.98 (m, 2 H), 3.88 (s, 3 H), 3.41 -3.37 (m, 2 H), 2.99-2.94 (m, 5 H), 2.02-2.00 (m, 4 H), 1.66-1.59 (m, 2 H), 0.74 (t, J = 6.0 Hz, 1 H), 0.43-0.38 (m, 2 H), 0.13-0.07 (m, 2 H). MS: 420.1 (M+H+).
EXAMPLE 105
(4- { [7-(2-chlorophenoxy )-4-hy droxy py rido[3 ,4-d]pyridazin-5 -y 1] amino } -3- methoxyphenyl)(pyrrolidin- l-yl)methanone
EXAMPLE 105 A
(4-amino-3-methoxyphenyl)(pyrrolidin-l -yl)methanone To a solution of 4-amino-3-methoxy benzoic acid (167 mg, 1 mmol) in
dichloromethane (20 mL) at 0°C was added pyrrolidine (71 mg, 1 mmol),
hydroxybenzotriazole monohydrate (270 mg, 2 mmol), l-ethyl-3-(3- dimethylaminopropyl)carbodiimide (384 mg, 2 mmol) and triethy lamine (0.5 mL, 3 mmol). After stirring for 2 hours, the mixture was diluted with water and extracted by
dichloromethane. The organic phase was concentrated and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 5/1 petroleum ether/ethyl acetate to give the title compound. MS: 220 (M + H+).
EXAMPLE 105B
7-chloro-5-(2-methoxy-4-(pyrrolidine-l-carbonyl)phenylamino)pyrido[3,4-d]pyridazin-
4(3H)-one
A mixture of EXAMPLE 7K (100 mg, 0.47 mmol), EXAMPLE 105 A (HO mg, 0.51 mmol) and ethyl diisopropylamine (0.3 mL, 1.41 mmol) in 1,4-dioxane (10 mL) was heated in a sealed tube at 140"C for 16 hours. The mixture was concentrated and the residue was washed with 1/10 methanol/dichloromethane to give the title compound.
EXAMPLE 105C (4-{ [7-(2-chlorophenoxy)-4-hydroxypyrido[3,4-d]pyridazin-5-yl]amino}-3- methoxyphenyl)(pyrrolidin- l-yl)methanone
A mixture of EXAMPLE 105B (120 mg, 0.3 mmol), 2-chlorophenol ( 160 mg, 1.2 mmol), cuprous iodide (6 mg, 0.03 mmol), 2-(dimethylamino)acetic acid ( 17 mg, 0.09mmol) and cesium carbonate (0.2 g, 0.6 mmol) in 1 ,4-dioxane (5 mL) was heated in a sealed tube at 120°C overnight. After concentration, the residue was purified by preparative HPLC using a gradient of 10/90 to 90/10 acetronitrile in water (containing 0. 1% trifluoroacetic acid) to give the title compound. Ή NMR (DMSO-fife 300 MHz): δ 12.88 (s, 1 H), 1 1.88 (s, 1 H), 8.31 (s, 1 H). 7.90 (s, 1 H). 7.78-7.72 (m, 1 H), 7.60-7.49 (m, 4 H), 7. 14 (s, 1 H), 6.82 (s, 1 H), 6.59 (d, ./ = 8.1 Hz, 2 H), 3.92 (s, 3 H), 3.46-3.40 (m, 4 H), 3.91-3.85 (m, 4 H). MS: 493 (M+H+).
EXAMPLE 106
7-(2-chlorophenoxy)-5-{[2-ethoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[3,4-d]pyridazin-
4(3H)-one
EXAMPLE 106 A
tert-butyl 4-(4-amino-3-ethoxyphenyl)-5,6-dihydropyridine- l(2/ )-carboxylate
To a solution of 4-bromo-2-ethoxy aniline (215 mg, 4.65 mmol) in 1 ,4-dioxane (40 mL) and water (10 mL) was added tert-butyl 4-(4,4.5,5-tetramethyl-l ,3,2-dioxborolan-2-yl)- 5.6-dihydropyridine- l(2//)-carboxylate (1.58 g, 5.12 mmol), 1 , 1 '- bis(diphenylphosphino)ferrocene palladium(II) dichloride (339 mg, 0.46 mmol) and potassium carbonate (1.9 g,3.95 mmol) and the mixture was heated at 100°C for 14 hours. After cooling to ambient temperature, the mixture was filtered and purified by flash chromatography on silica gel eluting with 100/1 dichloromethane/methanol to provide the title compound. MS: 319 (M + H").
EXAMPLE 106B
tert-butyl 4-(4-amino-3-ethoxyphenyl)piperidine-l -carboxylate
To a solution of EXAMPLE 106 A (360 mg. 1.13 mmol) in methanol (100 mL) was added 10% palladium on carbon (500 mg) and the mixture was stirred under hydrogen for 14 hours. The solid was filtered off and the residue was purified by flash chromatography on silica gel (200 - 300 mesh) eluting with 100/1 dichloromethane/methanol to provide the title compound. MS: 265 (M - 56 + H^.
EXAMPLE 106C
tert-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-d]pyridazin-5-ylamino)-3- ethoxyphenyl)piperidine- 1 -carboxy late To a solution of EXAMPLE 106B (270 mg, 0.84 mmol) in 1 ,4-dioxane (20 mL) was added EXAMPLE 7K ( 150 mg, 0.7 mmol) and Ν,Ν-diisopropylethylamine (0.25 mL, 1.4 mmol) and the mixture was heated in a sealed tube at 120°C for 14 hours. After cooling to ambient temperature, the mixture was filtered and purified by flash chromatography on silica gel eluting with 100/1 dichloromethane/methanol to provide the title compound. MS: 500 (M + rT).
EXAMPLE 106D
7-(2-chlorophenoxy)-5-{[2-ethoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[3,4-d]pyridazin-
4(3H)-one
To a solution of EXAMPLE 106C (240 mg. 0.48 mmol) in 1 ,4-dioxane (20 mL) was added 2-chlorophenol (0.06 mL. 0.58 mmol). cuprous iodide (9 mg. 0.048 mmol), 2- (dimethylamino)acetic acid (15 mg, 0.14 mmol) and cesium carbonate (3 12 mg. 0.96 mmol) and the mixture was heated in a sealed tube at 100°C for 14 hours. After cooling to ambient temperature, the mixture was filtered and purified by flash chromatography on silica gel eluting with 100/1 dichloromethane/methanol to provide the title compound. MS: 592 (M + H+).
EXAMPLE 107
2-(2-fluorobenzyl)-4-{ [2-memoxy-4-( iperidin-4-yl)phenyl]amino}pyrido[2,3-d]pyridazin-
5(6H)-one
EXAMPLE 107A
ieri-butyl 4-(4-((2-(2-fluorobenzyl)-5-oxo-5,6-dihydropyrido[2,3-i/]pyridazin-4-yl)amino)-3- methoxy pheny l)piperidine- 1 -carboxy late
A mixture of EXAMPLE 101 A (80.0 mg, 0.165 mmol), 0.5M (2- fluorobenzyl)zinc(II) bromide in tetrahydrofuran (3.3 mL, 1.65 mmol),
tetrakis(triphenylphosphine)palladium (19.1 mg, 0.0165 mmol) in tetrahydrofuran (2 mL) was degassed with nitrogen and heated in a sealed tube at 80°C for 15 hours. After cooling to ambient temperature, the mixture was quenched with saturated aqueous ammonium chloride solution ( 1 mL) and extracted with dichloromethane (3 x 20 mL). The combined organic phase was dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash) chromatography on silica gel (200 - 300 mesh) eluting with 50/1 dichloromeThaTie7meTrTanoT to give the title compound. MS. 560 (M + H+).
EXAMPLE 107B 2 -(2-fluorobenzy l)-4- { [ 2-meft oxy -4-^iperi
5(6H)-one
To a solution of EXAMPLE 107A (50.0 mg, 0.0893 mmol) in dichloromethane (5 mL) was added trifluoroacetic acid (3 mL) and the mixture was stirred at ambient temperature for 1 hour. After concentration, the residue was purified by preparative HPLC using a gradient of 10/90 to 90/10 acetronitrile in water (containing 0. 1 % trifluoroacetic acid) to give the title compound. Ή NMR (DMSO-d6 + D20, 300 MHz): δ 8.22 (s, 1 H), 7.35 - 7.29 (m, 3 H), 7.20 - 7.14 (m, 2 H), 7.00 (s, 1 H), 6.90 - 6.87 (m, 1 H), 6.61 (s, 1 H), 3.75 (s, 3 H), 3.42 - 3.38 (m, 2 H), 3.06 - 2.85 (m, 3 H), 2.01 - 1.73 (m, 4 H). MS: 460 (M + H+).
EXAMPLE 108
2-(2,3-dichlorobenzyl)-4-{[2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one
EXAMPLE 108A
ieri-butyl 4-(4-(2-(2,3-dichlorobenzy l)-5-oxo-5,6-dihydropyridof3.2-i/|pyridazin-4-yIamino)- 3 -metho y pheny piperidine- 1 -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 107 A, using (2,3-dichlorobenzyl)zinc(II) bromide in place of (2-fluorobenzyl)zinc(II) bromide. MS: 610 (M+tT).
EXAMPLE 108B
2-(2,3-dichlorobenzyl)-4-{[2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one
The title compound was obtained following the procedure described in EXAMPLE 107B, using EXAMPLE 108A in place of EXAMPLE 107A. Ή NMR (CD3OD. 300 MHz): δ 8.29 (s, 1 H), 7.57 - 7.54 (m, 1 H), 7.33 - 7.25 (s. 3 H). 7.00 (s. 1 H). 6.93 (d. J = 8.1 Hz, 1 H), 6.31 (s, 1 H), 4.37 (s, 2 H), 3.79 (s, 3 H), 3.57 - 3.53 (m, 2 H), 3.21 - 2.94 (m. 3 H), 2. 14 - 1.91(m, 4 H). MS: 510 (M+H+).
EXAMPLE 109
2-(2,6-difluorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one
EXAMPLE 109 A
ieri-butyl 4-(4-(2-(2,6-difluorobenzyl)-5-oxo-5,6-dihydropyrido[3.2-(/]pyridazin-4-ylamino)- 3 -methoxy pheny l)piperidine- 1 -carboxy late The title compound was obtained following the procedure described in EXAMPLE 107 A, using (2,6-fluorobenzyl)zinc(II) bromide in place of (2-fluorobenzyl)zinc(II) bromide. MS: 578 (M+rf ).
EXAMPLE 109B
2-(2,6-difluorobenzyl)-4-{[2-methox -4-( iperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one
The title compound was obtained following the procedure described in EXAMPLE 107B, using EXAMPLE 109A in place of EXAMPLE 107A. Ή NMR (CD3OD, 300 MHz): δ 8.35 (s, 1 H), 7.51 - 7.41 (m. 1 H), 7.29 (d. ./ = 8.1 Hz, 1 H). 7.1 1 - 7.05 (m. 4 H). 6.97 (dd. ./ = 1.5. 8.1 Hz, 1 H ). 6.38 (s. 1 H), 4.30 (s, 2 H). 3.80 (s, 3 H), 3.59 - 3.54 (m. 2 H). 3.24 - 3.15 (m, 1 H), 3.05 - 2.97 (m. 1 H), 2. 14 - 1 .96 (m. 4 H). MS: 478 (M+rT).
EXAMPLE 1 10
2-(2,5-difluorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one
EXAMPLE 1 1 OA
ter/-butyl 4-(4-((2-(2,5-difluorobenzyl)-5-oxo-5,6-dihydropyrido[2>3-rfJpyridazin-4- y l)amino)-3 -methoxy pheny l)piperidine- 1 -carboxy late A mixture of EXAMPLE 101 A (80.0 mg, 0. 165 mmol), 0.25 M (2,5- difluorobenzyl)zinc(II) bromide in tetrahydrofuran (6.6 mL. 1 .65 mmol) and
tetrakis(triphenylphosphine)palladium ( 19.1 mg, 0.0165 mmol) was degassed with nitrogen and heated in a sealed tube at 80°C for 15 hours. After cooling to ambient temperature, the mixture was diluted with saturated aqueous ammonium chloride solution (10 mL) and extracted with dichloromethane (3 x 20 mL). The organic phase was dried over anhydrous sodium sulfate, filtered, concentrated and purified by flash chromatography on silica gel (200-300 mesh) eluting with 50/1 dichloromethane/methanol to give the title compound. MS: 578 (M + H+).
EXAMPLE H OB
2-(2,5-difluorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one
To a solution of EXAMPLE 1 1 OA (90.5 mg, 0.157 mmol) in dichloromethane (5 mL) was added trifluoroacetic acid (3 mL) and the mixture was stirred at ambient temperature for 1 hour. After concentration, the residue was purified by preparative HPLC using a gradient of 10/90 to 90/10 acetronitrile in water (containing 0. 1% trifluoroacetic acid) to give the title compound as a solid trifluoroacetate salt. Ή NMR (DMSO-c/e, 300 MHz): δ 13.15 (s, 1 H), 1 1.15 (s, 1 H). 8.90 - 8.85 (m, 1 H). 8.74 - 8.69 (m, 1 H). 8.27 (s. 1 H). 7.37 (d, J = 8. 1 Hz. 1 H). 7.29 - 7.13 (m. 3 H), 7.00 (s, 1 H). 6.87 (d. J = 8.1 Hz. 1 H). 6.76 (s, 1 H). 4.15 (s, 2 H). 3.79 (s, 3 H), 3.41 - 3.36 (m, 2 H), 3.06 - 2.85 (m, 3 H), 2.01 - 1.81 (m, 4 H). MS: 478 (M + H+).
EXAMPLE 1 11
2-(2,3-difluorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,^ d]pyridazin-5(6H)-one
EXAMPLE 1 1 1 A
t eri-buty 1 4-(4-(2-(2,3 -difluorobenzy l)-5 -oxo-5 ,6-dihy dropy rido [32-d\ >y ridazin-4-y lamino)- 3 -methoxy pheny l)piperidine- 1 -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 107A, using (2,3-fluorobenzyl)zinc(II) bromide in place of (2-fluorobenzyl)zinc(II) bromide. MS : 578 (M+rT).
EXAMPLE 1 1 I B
2-(2,3-difluorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]py ridazin-5 (6H)-one
The title compound was obtained following the procedure described in EXAMPLE 107B, using EXAMPLE l l lA in place of EXAMPLE 107A. Ή NMR (CD3OD, 300 MHz): 5 8.34 (s, 1 H), 7.35 - 7.17 (m, 4 H), 7.09 (s, 1 H). 7.00 (d, J = 8.1 Hz, 1 H). 6.53 (s. 1 H), 4.32 (s, 2 H), 3.83 (s, 3 H), 3.58 - 3.54 (m, 2 H), 3.23 - 3.02 (m, 3 H), 2.15 - 1 .97 (m, 4 H). MS: 478 (M+Hf .
EXAMPLE 1 12
2-(2-chloro-6-fluorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one
EXAMPLE 1 12A
/er/-butyl 4-(4-(2-(2-chloro-6-fluorobenzyl)-5-oxo-5,6-dihydropyrido[3,2-rf)pyridazin-4- y Iamino)-3-methoxypheny l)piperidine- 1 -carboxy late The title compound was obtained following the procedure described in EXAMPLE 107 A, using (2-chloro-6-fluorobenzyl)zinc(II) bromide in place of (2-fluorobenzyl)zinc(II) bromide. MS: 594 (M+lT).
EXAMPLE 1 12B
2-(2-chloro-6-fluorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one The title compound was obtained following the procedure described in EXAMPLE 107B. using EXAMPLE 1 12A in place of EXAMPLE I 07A. Ή NMR (CD3OD. 300 MHz): 5 8.35 (s, 1 H). 7.56 - 7.42 (m, 1 H), 7.29 (d, ./ = 8. 1 Hz, 1 H), 7.1 1 - 7.05 (m, 3 H), 6.97 (d, J = 8. 1 Hz, 1 H), 6.38 (s, 1 H), 4.30 (s. 2 H), 3.80 (s, 3 H), 3.58 - 3.54 (m. 2 H), 3.21 - 3.05 (m. 3 H), 2. 12 - 2.00 (m, 4 H). MS: 494 (M+H+).
EXAMPLE 1 13
5-[(2-methoxyphenyl)amino]-7-{[4-(piperazin- l-yl)phenyl]amino}pyrido[3,4-d]pyridazin-4- ol
EXAMPLE 1 13A
7-chloro-5-(2-methoxyphenylamino)pyrido[3,4-d]pyridazin-4(3H)-one The title compound was obtained following the procedure described in EXAM LE 106C, using 2-methoxy aniline in place of EXAMPLE 106B.
EXAMPLE 1 13B
tert-butyl 4-(4-(5-(2-methoxyphenylamino)-4-oxo-3,4-dihydropyrido[3,4-d] pyridazin-7- y lamino)pheny l)piperazine- 1 -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 10A, using EXAMPLE 1 13A in place of EXAMPLE 24A and tert-butyl 4-(4- aminophenyl)piperazine- l -carboxy late in place of 2.6-dichlorobenzenamine.
EXAMPLE 1 13C
5-[(2-methoxyphenyl)amino]-7-{[4-(piperazin- l -y l)phenyl]amino}pyrido[3,4-d]pyridazin-4- ol
The title compound was obtained following the procedure described in EXAMPLE 2F, using EXAMPLE 113B in place of EXAMPLE 2E. Ή NMR (DMSO-ck, 300 MHz): δ 12.27 (s, 1 H), 1 1.69 (s, 1 H), 9.41 (s, 1 H), 9.12 (s, 2 H), 8.61 (s, 1 H), 8.03 (s, 1 H), 7.44- 7.41 (m, 3 H), 7.24 (s, 1 H), 7.07-6.99 (m„ 6 H), 6.88-6.83 (m, 1 H), 6.20 (s, 1 H), 3.90 (s, 3H ), 3.38-3.28 (m, 8 H). MS: 445 (M+H+).
EXAMPLE 1 14
7-(2-chlorophenoxy)-5-{ [2-ethoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4-d]pyridazin-
4-ol
EXAMPLE 1 14A
4-bromo-2-ethoxybenzenamine
To a solution of 2-ethoxybenzenamine (2 g, 14.58 mmol) in acetonitrile (100 mL) at 0°C was added N-bromosuccinimide (2.72 g, 1.05 mmol) and the mixture was stirred at ambient temperature for 4 hours. The mixture was concentrated and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 6/1 petroleum ether/ethyl acetate to provide the title compound. MS: 216 (M + H ).
EXAMPLE 1 14B
N,N-dibenzyl-4-bromo-2-ethoxybenzenamine To a solution of EXAMPLE 1 14A (500 mg, 2.32 mmol) in acetonitrile (20 mL) were added potassium carbonate (963 mg, 6.98 mmol) and benzyl bromide (0.83 mL, 6.98 mmol) and the mixture was heated at 90°C for 14 hours. The mixture was diluted with water ( 1 0 mL) and extracted with dichloromethane (3 * 100 mL). The combined organic layers were concentrated to provide the title compound. MS: 396 (M + H+).
EXAMPLE 1 14C
tert-butyl 4-(4-(dibenzylamino)-3-ethoxyphenyl)piperazine-l -carboxylate A mixture of EXAMPLE 1 14B (500 mg, 1.26 mmol), tert-butyl piperazine- 1 - carboxylate (260 mg, 1.39 mmol), palladium diacetate (44 mg, 0.19 mmol), (±)-2,2'- bis(diphenylphosphino)- l , l '-binaphthalene (235 mg, 0.38 mmol) and cesium carbonate (823 mg, 2.53 mmol) in 1 ,4-dioxane (10 mL) was heated at 1 10°C for 3 hours. After cooling to ambient temperature, the mixture was filtered and purified by flash chromatography on silica gel eluting with 100/1 dichloromethane/methanol to provide the title compound. MS: 502 (M + If).
EXAMPLE 1 14D
tert-buty l 4-(4-amino-3-ethoxyphenyl)piperazine- l -carboxylate
To a solution of EXAMPLE 1 14C (1 g. 1.99 mmol) in methanol ( 100 mL) was added 10% palladium on carbon (500 mg) and the mixture was stirred under hydrogen for 14 hours. The solid was filtered off and the filtrate was purified by flash chromatography on silica gel (200-300 mesh) eluting with 100/1 dichloromethane/methanol to provide the title compound. MS: 322 (M + H+).
EXAMPLE 114E
tert-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-d]pyridazin-5-ylamino)-3- ethoxy pheny l)piperazine- 1 -carboxy late
To a solution of EXAMPLE 1 14D (322 mg, 1 mmol) in 1 ,4-dioxane (20 mL) was added EXAMPLE 7 (215 mg, 1 mmol) and N,N-diisopropylethylamine (0.4 mL, 2 mmol) and the mixture was heated in a sealed tube at 120°C for 14 hours. After cooling to ambient temperature, the mixture was filtered and purified by flash chromatography on silica gel eluting with 100/1 dichloromethane/methanol to provide the title compound. MS: 501 (M+H+). EXAMPLE 1 14F
tert-butyl 4-(4-(7-(2<hlorophenoxy)-4-oxo-3,4-dihydropyrido[3,4-d]pyridazin-5-ylamino)-3- ethoxyphenyl)piperazine- l-carboxylate
To a solution of EXAMPLE 1 14E (400 mg, 1 mmol) in 1 ,4-dioxane (20 mL) was added 2-chlorophenol (0.1 ml, 0.96 mmol), cuprous iodide (15 mg, 0.1 mmol), 2-
(dimethylamino)acetic acid (25 mg, 0.24 mmol) and cesium carbonate (520 mg, 1.6 mmol) and the mixture was heated in a sealed tube at 100°C for 14 hours. After cooling to ambient temperature, the mixture was filtered and purified by flash chromatography on silica gel eluting wihth 100/1 dichloromethane/methanol to provide the title compound. MS. 593 (M + H+).
EXAMPLE 1 14G
7-(2-chlorophenoxy)-5-{[2-ethoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4-d]pyridazin-
4-ol
To a solution of EXAMPLE 1 14F (410 mg, 0.69 mmol) in dichloromethane (20 mL) was added 2,2,2-trifluoroacetic acid (6 mL) and the mixture was stirred at ambient temperature for 6 hours. The mixture was concentrated and the residue was purified by preparative HPLC using a gradient of 1 /90 to 80/20 acetronitrile in water (containing 0.1% trifluoroacetic acid) to give the title compound. Ή NMR (DMSO-c , 300 MHz): δ 12.84 (s, 1 H), 1 1.72 (s, 1 H), 8.81 - 8.78 (br, 2 H), 8.26 (s, 1 H), 7.73 - 7.70 (m, 1 H ), 7.56 - 7.44 (m, 4 H), 6.68 - 6.64 (m, 2 H ), 5.98 - 5.96 (m, 1 H), 4.15 - 4.10 (q, 2 H ), 3.27(m, 8 H), 1.46 - 1.42 (t, 3 H). MS: 493 (M + Ef).
EXAMPLE 1 15
2-[(5-{f2-methoxy-4-(piperazin- l -yl)phenyl]amino }-4-oxo-3,4-dihydropyridof3,4- d]pyridazin-7-yl)oxy ]benzonitrile
EXAMPLE 1 15 A
tert-buty 1 4-(4-(7-(2-cy anophenoxy )-4-oxo-3.4-dihy dropy rido[3 ,4-d]py ridazin-5 - y lam ino)-3 - methoxy pheny l)piperazine- 1 -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 62A, using 2-hydroxybenzonitrile in place of 2-chlorophenol.
EXAMPLE 1 15B
2-[(5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}-4-oxo-3,4-dihydropyrido[3,4- d]py ridazin-7-y l)oxy ]benzonitrile
The title compound was obtained following the procedure described in EXAMPLE 2F, using EXAMPLE 1 15 A in place of EXAMPLE 2E. Ή NMR (DMSCW6, 300 MHz): δ 12.82 (s, 1 H), 1 1.59 (s, 1 H), 9.03 (s, 2 H), 8.25(s, 1 H), 8.03 (d, J = 7.8 Hz, 1 H), 7.79-7.85 (m. 1 H). 7.60-7.53 (m, 2 H), 7.35 (d, ./ = 8.7 Hz, 1 H). 6.70-6.65 (m. 2 H), 5.98-5.95 (m, 1 H), 3.85 (s, 3 H), 3.27-3.21 (m, 8 H). MS: 471 (M+H÷).
EXAMPLE 1 16
2-(2-chlorobenzyl)-4-({2-me&oxy-4-J(4-methylpiperazin-l - yl)methyl]phenyl}amino)pyrido[2,3-d]pyridazin-5(6H)-one
EXAMPLE 1 16A
(3-methoxy-4-nitrophenyl)methanol
To a suspension of sodium borohydride (3.85 g, 101.4 mmol) in tetrahydrofuran (20 mL) at 0°C was added slowly a solution of 3-methoxy-4-nitrobenzoic acid (10.0 g, 50.7 mmol). Boron (tri)fluoride etherate ( 19.3 mL) was added dropwise and the mixture was stirred at ambient temperature for 4 hours. The mixture was diluted with water ( 100 mL) and extracted with ethyl acetate (3 x 150 mL). The combined organic extracts were dried over anhydrous sodium sulfate, filtered and concentrated to give the title compound.
EXAMPLE 1 16B
(4-amino-3 -methoxypheny l)methanol
To a solution of EXAMPLE 1 16A (6.25 g, 34 mmol) was added 10% Raney Nickel (625 mg) in methanol (400 mL). After stirring for 8 hours at ambient temperature under hydrogen, the mixture was filtered and concentrated to give the crude title compound. M S: 154 (M+H").
EXAMPLE 1 16C
2-chloro-4-(4-(hydroxymethyl)-2-methoxyphenylamino)pyrido[3,2-fl')pyridazin-5(6 )-one A mixture of EXAMPLE 68F (250 mg, 1.17 mmol), EXAMPLE 1 16B (190 mg, 1.23 mmol) and N,N-diisopropylethylamine (0.5 mL) in 1,4-dioxane (20 mL) was stirred at 100°C for 16 hours. The mixture was concentrated and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with a gradient of 100/1 to 70/1 dichloromethane/methanol to give title compound. MS: 333(M+H+).
EXAMPLE 1 16D
2-(2-chlorobenzyl)-4-(4-(Tiydroxymethyl)-2-methoxy phenylamino)pyridof3,2-^pyridazin- 5(6 )-one
A mixture of EXAMPLE 1 16C (3 18 mg, 0.96 mmol), 0.5M 2-chlorobenzyl)zinc(lI) bromide in tetrahydrofuran (19.2 mL, 9.6 mmol) and tetrakis(triphenylphosphine)palladium (1 10 mg, 0.1 mmol) in tetrahydrofuran (8 mL) was heated under nitrogen at 70°C for 16 hours. The mixture was neutralized with ammonium chloride solution (5 mL) and extracted with ethy l acetate (3 x 15 mL). The combined organic layers were washed w ith brine, dried over anhydrous sodium sulfate, filtered, and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with a gradient of 100/1 to 50/1 dichloromethane/methanol to give the title compound. MS: 423 (M+H+).
EXAMPLE 116E
4-(2-(2-chlorobenzyl)-5-oxo-5,6-dihydropyrido[3,2-c/)pyridazin-4-ylamino)-3- methoxybenzaldehyde
To a solution of EXAMPLE 1 16D (150 mg, 0.35 mmol) in dichloromethane (30 mL) at 0°C was added Dess-Martin periodinane (180 mg, 0.42 mmol) and the mixture was stirred at ambient temperature for 4 hours. The mixture was quenched with saturated sodium thiosulfate (5 mL), diluted with water (20 mL) and extracted with dichloromethane (3 x 20 mL). The combined organic extracts were dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with a gradient of 100/1 to 30/1 dichloromethane/methanol to give the title compound. MS: 421 (M+H+).
EXAMPLE 1 16F
2-(2-chlorobenzyl)-4-({2-methoxy-4-[(4-methylpiperazin-l - yl)methyl]phenyl}amino)pyrido[2.3-d]pyridazin-5(6H)-one To a solution of EXAMPLE 1 16E (40 mg, 0.1 mmol) and /V-methylpiperazine (12 μί, 0.1 1 mmol) in 1 ,2-dichloroethane (20 mL) was added acetic acid (12 mg, 0.2 mmol) and 4A molecular sieves. The mixture was stirred at ambient temperature for 1 hour and sodium triacetoxyborohydride (45 mg, 0.2 mmol) was added. The mixture was stirred at ambient temperature for 14 hours, treated with saturated ammonium chloride aqueous solution (8 mL), and extracted with dichloromethane (3 x 20 mL). The organic phase was dried over anhydrous sodium sulfate, filtered and concentrated, and the residue was purified by preparative HPLC using a gradient of 10/90 to 90/10 acetronitrile in water (containing 0.1% trifluoroacetic acid) to give the title compound. Ή NMR (CD3OD, 300 MHz): δ 8.36 (s, 1 H), 7.55 - 7.26 (m, 5 H), 6.56 (s, 1 H). 4.50 (s, 2 H), 4.40 (s. 2 H), 3.87 (s. 3 H), 3.66 (brs. 8 H), 3.05 (s, 3 H). MS: 505 (M+H*).
EXAMPLE 1 17
7-(2-chlorophenoxy)-5-{ [2-(difluoromethoxy)-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one
EXAMPLE 1 17A 4-bromo-2-(difluoromethoxy )- 1 -nitrobenzene A suspension of 5-bromo-2-nitrophenol (2.0 g, 9.2 mmol), sodium 2-chloro-2,2- difluoroacetate (3.5 g, 23 mmol) and cesium carbonate (4.5 g, 13.8 mmol) in 1/1 N,N- dimethylformamide/water (40 mL) was heated at 90°C for 16 hours. The mixture was diluted with water (50 mL) and extracted with ethyl acetate (3 x 30 mL). The combined organic phase was dried over sodium sulfate, filtered, concentrated and purified by flash
chromatography on silica gel (200-300 mesh) eluting with 40/1 petroleum ether/ethyl acetate to give the the title compound. MS: 268 (M + H+).
EXAMPLE 1 17B
ter/-butyl 4-(3-(difluoromethoxy)-4-nitrophenyl)piperazine-l -carboxylate
A suspension of EXAMPLE 1 17A (300 mg, 1. 1 mmol), tert-butyl piperazine- 1 - carboxylate (400 mg, 2. 1 mmol). palladium(II) acetate (75 mg, 0.32 mmol), (R)-(+)-2,2'- bis(diphenylphosphosino)-l , l '-binaphthyl (399 mg, 0.64 mmol) and cesium carbonate (1.0 g, 3.2 mmol) in toluene (60 mL) was heated in a sealed tube at 100"C under nitrogen for 16 hours. After concentration, the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 20/1 petroleum ether/ethyl acetate to give the the title compound. MS: 374 (M + Hf).
EXAMPLE 1 17C
tert-buty 1 4-(4-amino-3 -(difluoromethoxy )pheny Opiperazine- 1 -carboxy late A suspension of EXAMPLE 1 17B (150 mg. 0.39 mmol) and 10% palladium on carbon
(15 mg) in methanol (20 mL) was stirred under hydrogen for 12 hours. The catalyst was filtered and the filtrate was concentrated to provide the crude title compound which was used in the next step without further purification. MS: 344 (M + FT).
EXAMPLE 1 17D
tert-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-d]pyridazin-5-ylamino)- 3-
(difluoromethoxy)phenyl)piperazine-l-carboxylate The title compound was obtained following the procedure described in EXAMPLE 24A. using EXAMPLE 1 17C in place of EXAMPLE 1 G.
EXAMPLE 1 1 7E
tert-butyl 4-(4-(7-(2-chlwc^henoxy)-4-oxo-3,4-dihydropyrido[3,^^
(difluoromethoxy )pheny Opiperazine- 1 -carboxy late The title compound was obtained following the procedure described in EXAMPLE 62 A, using EXAMPLE 1 17D in place of EXAMPLE 24 A.
EXAMPLE 1 17F 7-(2-chlorophenoxy )-5- { [2-(difluoromethoxy )-4-(piperazin- 1 -y l)pheny IJamino }py rido [3 ,4- d]pyridazin-4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 2F, using EXAMPLE 1 17E in place of EXAMPLE 2E. Ή NMR (DMSO-atf, 300 MHz): δ 12.83 (s, 1 H), 1 1.65 (s. 1 H), 8.90 (s. 2 H), 8.24(s, 1 H), 7.52-7.44 (m, 5 H), 7.21 (t, 1 H), 7.67 (s, 1 H), 6.28 (dd, J = 2.7 Hz, 9.3 Hz, 1 H), 3.58-3.55 (m, 8 H). MS: 516(M+H+).
EXAMPLE 1 18
7-(2-chlorophenoxy)-5-{[5-(piperidin-4-yl)pyridin-2-yl]amino}pyrido[3,4-d]pyridazin-
4(3H)-one
EXAMPLE 1 18A
terr-butyl 4-(6-aminopyridin-3-yl)-5,6-dihydropyridine-l(2/ )-carboxylate A mixture of 5-bromopyridin-2-amine (1 g, 5.78 mmol), /ert-butyl 4-(4,4,5,5- tetramethyl-l ,3,2-dioxaborolan-2-yl)-5,6-dihydropyridine-l (2H)-carboxylate (2.14 g, 6.94 mmol), [l , l '-bis(diphenylphosphino)ferrocene]palladium(II) chloride (212 mg, 0.29 mmol) and sodium carbonate (1.84 g, 17.34 mmol) in 1 ,4-dioxne (30 mL) and water (7 mL) was heated under nitrogen at 80°C for 16 hours. The mixture was concentrated and the residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 95/5 dichloromethane/methanol to give the title compound. MS: 276 (M+H+).
EXAMPLE 1 18B
ieri-butyl 4-(6-aminopyridin-3-yl)piperidine- l -carboxylate
To a suspension of EXAMPLE 1 18A (1 .6 g, 5.80 mmol) in methanol (100 mL) was added 10% palladium on carbon (200 mg) and the mixture was stirred at ambient temperature under hydrogen for 4 hours. The catal st was filtered off and the filtrate was concentrated. The residue was purified by flash chromatography on silica gel (200-300 mesh) eluting with 95/5 dichloromethane/methanol to give the title compound. MS: 278 (M+H*).
EXAMPLE 1 18C
/err-butyl 4-(6-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-^pyridazin-5-ylamino) pyridin-3- yl)piperidine-l-carboxylate
The title compound was obtained following the procedure described in EXAMPLE 57E, using EXAMPLE 1 18B in place of EXAMPLE 57D. MS: 457 (M+H+).
EXAMPLE 1 18D
/er/-but l 4-(6-(7-(2-chlorophenoxy)-4-oxo-3,4-dihydropyrido[3,4-i ]pyridazin-5- ylamino)pyridin-3-yl)piperidine- l-carboxylate The title compound was obtained following the procedure described in EXAMPLE 62A, using EXAMPLE 1 18C in place of EXAMPLE 24A. MS: 549 (M+H+).
EXAMPLE 1 18E
7-(2-chlorophenoxy)-5-{[5-( iperidin-4-yl)pyridin-2-yl]amino}pyrido[3,4-d]pyridazin-
4(3H)-one
The title compound was obtained following the procedure described in EXAMPLE 28B, using EXAMPLE 1 18D in place of EXAMPLE 28A. Ή NMR (CD3OD, 300 MHz): δ 8.30 (s, 1 H), 7.98-7.96 (m, 2 H), 7.80-7.69 (m, 2 H), 7.55-7.49 (m, 3 H). 6.99 (s, 1 H), 3.58- 3.54 (m, 2 H), 3.32-3.31 (m, 3 H), 2.15-1.95 (m, 4 H). MS: 449 (M+rT).
EXAMPLE 1 19
7-(2-chlorophenoxy)-5-{ [2-methoxy-4-(piperazin- l-yl)phenyl]amino}- l-methylpyrido[3.4- d]pyridazin-4-ol
EXAMPLE 1 19A
2,6-dichloroisonicotinic acid
A solution of 2,6-dihydroxyisonicotinic acid (31 .0 g, 20() mmol) in phosphoryl trichloride (150 mL) was stirred in a high-pressure reactor at 130T for 6 hours and at 150'C for 1 hour. After cooling to ambient temperature, the mixture was poured onto ice (1 00 g) and stirred for 2 hours. The mixture was filtered to give the title compound.
EXAMPLE 1 19B
2,6-dichloro-N-methoxy-N-methylisonicotinamide To a solution of EXAMPLE 1 19A (8.0 g, 43.2 mmol) in dichloromethane (150 mL) was added l , l '-carbonyldiimidazole (12.5 g, 77.2 mmol) in portions over 20 minutes. Ν,Ο- dimethylhydroxylamine (12.0 g. 122.4 mmol) was added in portions and the mixture was stirred for 10 hours, filtered and concentrated. The crude residue was purified by flash chromatography on silica gel eiuting with 10: 1 petroleum ethenethyl acetate to yield the title compound.
EXAMPLE 1 19C
l -(2,6-dichloropyridin-4-yl)ethanone
To a solution of EXAMPLE 119B (5.7 g, 24.3 mmol) in tetrahydrofuran (150 mL) at - 70 C was added a solution of methy lmagrtesium chloride (16.2 mL, 48.6 mmol) in tetrahydrofuran dropwise. The mixture was warmed up to ambient temperature and stirred for 2 hours. The mixture was treated with saturated sodium chloride (10 mL) and extracted with ethyl acetate (2 x 100 mL). The combined organic phase was dried over magnesium sulfate, filtered, concentrated and purified by flash chromatography on silica gel eluting with 16: lpetroleum ethenethyl acetate to give the title compound.
EXAMPLE 1 19D
2,6-dichloro-4-(2-methyl- l ,3-dioxolan-2-yl)pyridine A mixture of EXAMPLE 1 19C (4.0 g, 20 mmol), ethane- 1 ,2-diol (6.5 g, l OO mmol) and 4-methylbenzenesulfonic acid (0.3 g, 0.18 mmol) in toluene (80 mL) was heated at 105°C for 15 hours. After cooling to ambient temperature, the mixture was concentrated and the residue was purified by flash chromatography on silica gel eluting with 10. 1 petroleum ether/ethyl acetate to give the title compound.
EXAMPLE 1 1 E
methy 1 2,6-dichloro-4-(2-methy I- 1.3 -dioxolan-2-y l)nicotinate To a solution of EXAMPLE 1 19D (3.8 g, 1 mmol) in tetrahydrofuran ( 1 0 mL) at - 70 C was added tetramethylethylenediamine (7.3 mL, 50 mmol). After stirring for 10 minutes, 2.5M butyllithium (20 mL, 50 mmol) was added dropwise and the mixture was stirred at -70°C for 2 hours. Methyl carbonochloridate (3.0 mL, 40 mmol) was added dropwise and the mixture was stirred at -70°C for 1.5 hours and warmed to ambient temperature. Water (5 mL) was added and the mixture was extracted with ethyl acetate (50 mL). The organic phase was washed with saturated sodium chloride (2 x 00 mL), dried over magnesium sulfate, filtered, concentrated and purified by flash chromatography on silica gel eluting ith 1 /1 petroleum ether/ethyl acetate to give the title compound.
EXAMPLE 1 19F
5,7-dichloro-l -methy lpyrido[3,4-i/|pyridazin-4(3 /)-one A mixture of EXAMPLE 1 19E (3.0 g, 10.3 mmol), hydrazine hydrochloride (3.0 g, 34.5 mmol) and concentrated hydrochloric acid (100 mL) in tetrahydrofuran (100 mL) was heated at 65 °C for 72 hours. The mixture was concentrated and the residue washed with water to afford the title compound.
EXAMPLE 1 19G
fcrt-butyl 4-(4-(7-chloro-l -methy l-4-oxo-3.4-dihydropyrido[3.4-tf|pyridazin-5-y lamino)-3- methoxyphenyl)piperazine-l -carbox late
The title compound was obtained following the procedure described in EXAMPLE
2D, using EXAMPLE 1 19F in place of EXAMPLE 2C.
EXAMPLE 1 19H
tert-butyl 4-(4-(7-(2-chlorophenoxy)-l -methyl-4-oxo-3,4-dihydropyrido[3,4-i/]pyridazin-5- ylamino)-3-methoxyphenyl)piperazine-l -carboxylate The title compound was obtained following the procedure described in EXAMPLE 62A. using EXAMPLE 1 19G in place of EXAMPLE 24A. MS: 593(M+H+).
EXAMPLE 1 191
7 2 hlorophenoxy)-5-{[2-methoxy-4-(piperazin-l-yl)phenyl]amino}-l -methylpyrido[3,4- d]pyridazin-4-ol
The title compound was obtained following the procedure described in EXAMPLE 62A, using EXAMPLE 1 19H in place of EXAMPLE 24A. Ή NMR (CD3OD, 300 MHz): δ 7.61-7.34 (m, 5 H), 6.67-6.63 (m, 2 H), 6.10 (s, 1 H), 3.93 (s, 3 H), 3.33 (m, 8 H), 2.49 (s, 3 H). MS: 493 (M+H4).
EXAMPLE 120
2-{ [7-(2-chlorophenox )-4-hyaVoxypyrido[3.4-d]pyridazin-5-y l]amino}-5-(piperazin- l - yl)benzonitrile
EXAMPLE 120A
ieri-buty 1 4-(3 -cy ano-4-nitropheny piperazine- 1 -carboxy late A suspension of 5-bromo-2-nitrobenzonitrile (300 mg, 1.806 mmol), tert-butyl piperazine-l -carboxylate (370 mg, 1.97 mmol) and potassium carbonate (500 g, 3.612 mmol) in tetrahydrofuran (20 mL) was heated at 60°C for 9 hours. After cooling to ambient temperature, the mixture was diluted with water (50 mL) and extracted with dichloromethane. The organic layer was dried over sodium sulfate, filtered and concentrated. The residue was recrystallized from ethanol to give the title compound.
EXAMPLE 120B
ter/-butyl 4-(4-amino-3-cyanophenyl)piperazine- l -carboxy late A mixture of EXAMPLE 120A (620 mg, 1.806 mmol) and 10% palladium on carbon (60 mg) in methanol (10 mL) was stirred under hydrogen at ambient temperature for 1 hour. The mixture was filtered through diatomaceous earth and the filtrate was concentrated. The residue was purified by flash chromatography on silica gel (200~300 mesh) eluting with a gradient of 3/1 to 2/1 petroleum ether/ethyl acetate to give the title compound.
EXAMPLE 120C
iert-butyl 4-(4-(7-chloro-4-oxo-3,4-dihydropyrido[3,4-i/|pyridazin-5-ylamino)-3- cyanophenyl)piperazme- l -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 24A, using EXAMPLE 120B in place of EXAMPLE 1G. MS: 482 (M+H+).
EXAMPLE 120D
ier/-butyl 4-(4-(7-(2-chlorophenoxy)-4-oxo-3,4-dihydropyrido[3,4-rf|pyridazin-5-ylamino)-3- cyanopheny l)piperazine- 1 -carboxy late
The title compound was obtained following the procedure described in EXAMPLE 62A. using EXAMPLE 120C in place of EXAMPLE 24A. MS: 738 (M+H+).
EXAMPLE 120E
2-{ [7-(2-chlorophenoxy)-4-hya^oxypyrido[3,4-d]pyridazin-5-yl]amino }-5-(piperazin- l - yl)benzonitrile
The title compound was obtained following the procedure described in EXAMPLE 26E, using EXAMPLE 120D in place of EXAMPLE 26D. Ή NMR (CD3OD, 300 MHz): δ 8.18 (s, 1 H), 7.6 8 (d, J = 9.6 Hz, 1 H), 7.57 (dd, J = 1.8 Hz, J = 7.8 Hz, 1 H), 7.43 (m, 1 H), 7.37 (m, 1 H), 7.33 (m, 1 H), 7.21 (m, 1 H), 6.81 (dd, J = 2.7 Hz, J = 9.3 Hz, 1 H), 6.69 (s, 1 H), 3.37 (m, 8 H). MS: 474; 476 (M+H+).
Example 121
Enzyme Inhibition Data
The follo ing procedure is used to determine ALK Activity .
ALK kinase assays were conducted with the indicated final concentrations unless otherwise specified. In 384 well black plates (Axygen), 8 μΐ of compound (2% DMSO) was incubated with 8 μΐ Lck-peptide substrate (0.5 μΜ, biotin-Ahx-GAEEEIYAAFFA-COOH) and 8 μΐ of a mixture of ALK (3 nM, Millipore) and ATP (50 μΜ) in reaction buffer (50 mM Hepes, pH 7.4; 10 mM MgCl2; 2 mM MnCl2; 0.1 mM sodium orthovanadate; 0.01 % BSA and 1 mM DTT (added fresh before assay) for 1 h at room temperature. Reactions were then quenched by the addition of 30 μΐ quench solution (streptavidin-allophycocyanin and Europium-cryptate PT66 monoclonal antibody in 40 mM Hepes, pH 7.4; 480 mM KF; 66 mM EDTA; 0.01% Tween-20; and 0.1 % BSA) at room temperature. Plates were read 1 h after quenching on an Envision Multilaber Reader and IC50 values were calculated using a sigmoidal fit of the concentration/inhibition response curves. These values were converted to apparent K, values using the Cheng-Prusoff relationship.
Alternatively, 4 nM ALK (Millipore) and 50 μΜ ATP were pre-incubated for 30 min at room temperate in 384 well plates (Coming 3676) m 2.5X reaction buffer (125 nM SEB from Cisbio Bioassays, 12.5 mM MgC , 5 mM MnCb, and 2.5 mM DTT). Reactions were initiated by the addition of 4 μΐ ALK-ATP mixture to 2 μΐ compounds (2% DMSO) and 4 μΐ TK-substrate biotin (Cisbio Bioassays). After incubation for 1 h at room temperature, reactions were quenched in 10 μΐ stop buffer (Cisbio detection buffer containing Streptavididn-XL665 and Eu-Cryptate PT66 monoclonal antibody). Plates were read 1 h after quenching on an Envision Multilaber Reader and IC50 values were calculated using a sigmoidal fit of the concentration/inhibition response curves. These values were converted to apparent Kj values using the Cheng-Prusoff relationship. Results are shown in Table 1.
Table 1
ALK Activity
HTRF ALK HTRF_ALK
Example Example
Human - K, Human - K,
1 0.01 1 61 0.002
2 0.0014 62 0.002
3 0.66 63 0.001
4 0.94 64 0.021
5 0.001 65 0.001
6 0.602 66 0.010
7 0.001 67 0.002
8 >0.47 68 0.002
9 >0.47 69 0.001
10 0.002 70 0.001
11 >4.7 71 0.001
12 0.003 72 0.012
13 0.001 73 0.001
14 0.013 74 0.004
15 0.003 75 0.004
16 >4.7 76 0.004
17 0.006 77 0.004
18 3.1 78 0.004
19 >4.7 79 0.005
20 0.003 80 0.001
21 0.368 81 >0.47
22 0.002 82 0.004
23 0.021 83 >0.47
24 0.004 84 0.005
25 0.006 85 0.005 26 0.000 86 0.002
27 0.003 87 0.004
28 0.004 88 0.004
29 0.001 89 0.015
30 0.003 90 0.007
31 0.019 91 0.055
32 0.002 92 0.015
33 0.0002 93 0.004
34 0.004 94 0.051
35 0.001 95 0.138
36 0.026 96 0.009
37 0.003 97 0.074
38 0.016 98 0.009
39 0.007 99 0.006
40 0.036 100 0.004
41 0.028 101 0.001
42 0.025 102 0.331
43 0.015 103 0.020
44 0.013 104 0.075
45 0.051 105 >0.47
46 0.003 106 0.021
47 0.053 107 0.016
48 0.004 108 0.008
49 0.001 109 0.006
50 0.009 1 10 0.016
51 0.002 1 11 0.015
52 0.002 1 12 0.004
53 0.004 1 13 0.058
54 0.004 114 0.008
55 0.006 115 0.006
56 0.005 1 16 0.033
57 0.002 1 17 0.015 58 0.004 1 18 0.015
59 0.004 1 19 0.015
60 0.003 120 0.002
Compounds of the present invention assessed by the above-described assays were found to have ALK kinase-inhibiting activity.
All publication and patent applications cited in this specification are herein incorporated by reference as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Although the foregoing invention has been described in some detail by way of illustration and example for purposes of clarity of understanding, it w ill be readily apparent to those of ordinary skill in the art in light of the teachings of this invention that certain changes and modifications may be made thereto without departing from the spirit or scope of the appended claims.

Claims

WE CLAIM:
1. A compound of formula (I):
Figure imgf000181_0001
XisCHorN;
Y is CH or N;
wherein at least one of X and Y is N; A is phenyl, naphthyl, indenyl, C3.8 cycloalkyl, 4-7 membered heterocycloalkyl, 5-7 membered heterocycloalkenyl, or 5-7 membered heteroaryl;
B is
(a) phenyl, naphthyl. tetrahydronaphthyl, indenyl. or indanyl. wherein the phenyl, naphthyl, tetrahydronaphthyl, indenyl, or indanyl is optionally substituted with one, two, three, or four R2 and is substituted with R3; or
(b) 5-16 membered monocyclic, bicyclic, or tricyclic heterocyclyl, wherein the heterocyclyl is optionally substituted with one, two, three, four, or five R4;
Z is a bond, C j.e alkylene, C2-6 alkenylene, -O- or -NR5-;
R1. at each occurrence, is independently selected from the group consisting of halo. CN, NO2, C i-6-alky l, C i-e-haloalkyl, aryl. C3-8 cycloalkyl, heteroaryl. heterocycloalkyl. OR6. SR6, C(0)R6, C(0)NR7R8, C(0)OR6. OC(0)R6, OC(0)NR7R8. NR7R*. NR7C(0)R6, S(0)R6. S(0)NR7R8, S(0)2R6, NR7S(0)2R6, and S(0)2NR7R8; wherein the C3.g cycloalkyl, aryl, heterocycloalkyl, and heteroaryl are optionally substituted with 1 , 2, or 3 substituents independently selected from halo, C, 6 alkyl, Cj.e haloalkyl, CN, N02, OR\ SRA, C(0)RA, C(0)NRBRC, C(0)ORA, OC(0)RA, OC(0)NRBRC, NRBR°, NRbC(0)RA, S(0)RA, S(0)NRBRC, S(0)2RA, NRBS(0)2RA, and S(0)2NRBRC;
R2, at each occurrence, is independently selected from the group consisting of halo, CN. OH, Ci-6 alkyl, Ci-s-haloalkyl, Ci-e alkoxy,
Figure imgf000182_0001
haloalkoxy, C t-6-thioalkoxy. amino. C 1.6 alkylamino. and Ci.e dialkylamino,
R3 is selected from the group consisting of aryl, C3.8 cycloalkyl, heteroaryl, heterocycloalkyl, aryl-Ci.e-alkyl-, C3.8 cycloalkyl-C i .6-alkyl-. heteroaryl-Ci-6-alkyl-, heterocycloalkyl-C,.6-alkyl-, OR9, C(0)R9, -C,.6-alkyl-C(0)R9, C(O)NR10RN , C(0)OR9, OC(0)R9, OC(O)NR10RU , NRI OR" , NRL F)C(0)R9, S(0)R9, S<O)NR10RU , S(0>2R9,
NR, 0S(O)2R9, and S(0)2NRI NRN , wherein the C3.8 cycloalkyl, aryl, heterocycloalkyl, and heteroaryl, alone or part of another moiety, are optionally substituted with one, two, or three R'2; R4 is CN, N02, halo. C,.6-alkyl, C,.6-haloalkyl, ORJ, SRJ, C(0)Rd, C(0)NRcRf, C(0)ORd, NReRf, NReC(0)Rd, S(0)2Rd, NReS(0)2Rd, or S(0)2NReRf;
R5 is H or Ci-6-alkyl;
R6, R7, and Rs, at each occurrence, are independently selected from H, Ci_6 alkyl, C]. 6 haloalkyl, aryl, C3.8 cycloalkyl, heteroaryl, and heterocycloalkyl, wherein the aryl, C3-S cvcloalkyl, heteroaryl, and heterocycloalkyl moiety are optionally substituted with 1. 2, or 3 substituents independently selected from halo, CN, OH, C1.6 alkyl, Ci-6-haloalkyl. C | .6 alkoxy, haloalkoxy, amino, Ci-e alkylamino, Ci-6 dialkylamino, C(0)OH, C(O) Ci-e alkyl, C(0)NH2, C(0)NH(C, .6 alkyl), or C(0)N(C,.6 alkyl)2;
R9, R10, and Rn, at each occurrence, are independently selected from H, C|.6 alkyl, Ci. 6 haloalkyl, heteroaryl-Ci e-alkyl-, heterocycloalkyl-C i-6-alkyl-, R1 Rl4N-Ci.6-alkyl-. aryl, C3- κ cycloalky l, heteroaryl, and heterocycloalkyl, wherein the ary l, C3-X cycloalkyl, heteroaryl, and heterocycloalkyl, alone or as part of another moiety, are optionally substituted with 1 , 2, or 3 substituents independently selected from halo, CN, OH, Ci_6 alkyl, Ci-6-haloalkyl, C i -6 alkoxy, Ci .6 haloalkoxy, amino, C 1-6 alky lamino, Ci.s dialkylamino, C(0)OH, C(O) C 1.6 alkyl, C(0)NH2) C(0)NH(Ci.6 alkyl), or C(0)N(C,.6 alkyl)2;
R'2, at each occurrence, is independently selected from the group consisting of halo, Ci .6 alkyl, Ci-6 haloalkyl, amino-Ci e-alkyl-, Ci-6 alkylamino-Ci.6 alkyl-, Ci-6 dialkylamino-Ci_ 6 alkyl-. hydroxy -Ci-6-alkyl-, C1.6 alky 1-C 1.6 alkoxy, aryl, C3.8 cycloalkyl, heteroaryl, heterocycloalkyl, aryl-(C|.6 alkyl)-, C3.8 cycloalkyl-(C i.6 alkyl)-, heteroaryl-(Ci.6 alkyl)-, heterocycloalkyl-(C, .6 alkyl)-, CN. N02. OR . SRB. C(0)R . C(0)NRhR', C(0)ORB.
OC(0)R8, OC(0)NRhR', NRhR', NRhC(0)Rs, S(0)RE, S(0)NRhR', S(0)2RB, NRhS(0)2R . and S(0)2NRhR', wherein the aryl, C3.g cycloalkyl, heteroaryl, and heterocycloalkyl, alone or as part of another moiety, are optionally substituted with one, two or three substituents independently selected from halo and C1.6 alkyl;
R13 and R14, at each occurrence, are independently selected from the group consisting of H, C1.6 alkyl. aryl, Ci * cycloalkyl. heteroaryl, and heterocycloalkyl; wherein the C|.6-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, C |.6-alkoxy, -NH2. -NHC i-6-alkyl, and -N(Ci-6-alkyl)2. and w herein the aryl. C3.8 cycloalkyl, heteroaryl, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, Ci-e-alkyl, Ci-6-haloalkyl, C1-6- hydroxyalkyl, hydroxy, oxo, Ci-e-alkoxy, Ci-6-haloalkoxy, -NH2, -NH(C].6-alkyl), and N(Ci_ 6-alkyl)2;
R\ at each occurrence, is independently selected from the gToup consisting of H, Ci 6 alkyl, aryl, C3-8 cycloalkyl, heteroaryl, and heterocycloalkyl: wherein the C] .6-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, Ci.6-alkoxy, -NH2, -NHCi.6-alkyl, and -N(Ci.6-alkyl)2, and wherein the aryl, C3.8 cycloalkyl, heteroaryl, or heterocycloalk l is optionally substituted with one or more substituents selected from the group consisting of halo, Ci.e-alkyl, Ci-6-haloalkyl, Ci_6- hydroxyalkyl, hydroxy, oxo, Ci-6-alkoxy, Ci-6-haloalkoxy, -NH2, -NH(Ci.6-alkyl), and N(C i. 6-alkyl)2;
Rb and Rc. at each occurrence, are independently selected from the group consisting of H, Ci-6 alkyl, aryl, C s cycloalkyl, heteroaryl, and heterocycloalkyl; wherein the Ci -s-alkyl is optionally substituted with one or more substituents selected from the gToup consisting of halo, hydroxy, Ci.6-alkoxy, -NH2, -NHCi-e-alkyl, and -N(Ci-6-alkyl)2, and wherein the aryl, C3.8 cycloalkyl, heteroaryl, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, Ci-e-alkyl, Ci-6-haloalkyl, Ci-6- hydroxyalkyl, hydroxy, oxo, Ci-6-alkoxy, Ci-6-haloalkoxy, -NH2, -NH(Ci.6-alkyl), and N(CV 6-alkyl)2;
R'1, at each occurrence, is independently selected from the group consisting of H, Cj.e alkyl, aryl, C3.8 cycloalkyl, heteroaryl, and heterocycloalkyl: wherein the Ci_6-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, Ci_6-alkoxy, -NH2, -NHCi.6-alkyl, and -N(Ci.6-alkyl>2, and wherein the aryl, C3-8 cycloalkyl, heteroaryl, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, Ci-e-alkyl, Ci.6-haloalkyl, Ci-e- hydroxyalkyl, hydroxy, oxo, Ci.6-alkoxy, Ci.6-haloalkoxy, -NH2, -NH(Ci.6-alkyl), and N(Ci. 6-alkyl)2;
Re and Rf, at each occurrence, are independently selected from the group consisting of H, C| -6 alkyl, aryl, C3.8 cycloalkyl, heteroaryl, and heterocycloalkyl; wherein the Ci -6— alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, Ci-6-alkoxy, -NH2, -NHCi-e-alkyl, and -N(Ci-6-alkyl)2, and wherein the aryl, C3-8 cycloalkyl, heteroaryl, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, Ci-6-alkyl, Ci-6-haloalkyl,
Figure imgf000185_0001
hydroxyalkyl, hydroxy, oxo, Ci.6-alkoxy, Ci.6-haloalkoxy, -NH2, -NH(Ci.6-alkyl), and N(Ci_ 6-alkyl)2;
R , at each occurrence, is independently selected from the group consisting of H, C 1.6 alkyl, aryl, C3-8 cycloalkyl, heteroaryl, and heterocycloalkyl: wherein the Ci-6-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, Ci.6-alkoxy, -NH2, -NHC|.6-alkyl, and -N(C].6-alkyl)2, and wherein the aryl, C3.8 cycloalkyl, heteroaryl, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, Ci-e-alkyl, Ci-6-haloalkyl, C| .e- hydroxyalkyl, hydroxy, oxo, Ci.6-alkoxy, C i-6-haloalkoxy, -NH2, -NH(Ci-6-alkyl), and N(Ci_ 6-alkyl)2;
Rh and R'. at each occurrence, are independently selected from the group consisting of H, Ci-6 alkyl, aryl, C3.8 cycloalkyl, heteroaryl, and heterocycloalkyl; wherein the Ci-6-alkyl is optionally substituted with one or more substituents selected from the group consisting of halo, hydroxy, Ci-6-alkoxy, -NH2, -NHCi.6-alkyl, and -N(Ci-6-alkyl)2, and wherein the aryl, C3.8 cycloalkyl, heteroaryl, or heterocycloalkyl is optionally substituted with one or more substituents selected from the group consisting of halo, Ci_6-alkyl, Ci.6-haloalkyl, C1.6- hydroxyalkyl, hydroxy, oxo, Ci-6-alkoxy, Ci-6-haloalkoxy, -NH2, -NH(Ci_6-alkyl), and N(Ci_ 6-alkyl)2; and n is 0, 1 , 2. or 3; or a pharmaceutically acceptable salt or solvate thereof. of claim 1 of formula (1) wherein G1 is
Figure imgf000186_0001
X is N; and
Y is CH. of claim 1 of formula (I) wherein G1 is
Figure imgf000186_0002
X is CH; and
Y is N. of formula (I) wherein G1 is
Figure imgf000186_0003
Y is CH.
5. The compound of any of claims 1 -4 of formula (I) wherein Z is bond.
6. The compound of any of claims 1 -4 of formula (I) wherein Z is Ci.6 alkylene.
7. The compound of any of claims 1 -4 of formula (I) wherein Z is -0-.
8. The compound of any of claims 1 -4 of formula (I) wherein Z is-NR5(CH2)P-.
9. The compound of any of claims 1 -8 of formula (I) wherein A is phenyl, wherein R1 is selected from the group consisting of halo, CN, N02, Ci-6-alkyl, Ci-6-haloalkyl, OR6, SR6, C(0)R6, C(0)OR6, NR7R8, and S(0)R6.
10. The compound of claim 9 of formula (I) wherein the phenyl is substituted with two R1, and R1 is halo.
1 1. The compound of any of claims 1 -10 of formula (I) wherein B is phenyl.
12. The compound of claim 13 of formula (I) wherein R3 is heterocycloalkyl.
13. -10 of formula (I) wherein
Figure imgf000187_0001
halo, C i.fi-alkyl, C,.6 haloalkyl. or OR6 and p is 0, 1 , or 2.
14. The compound of claim 1 of formula (I), or a pharmaceutically acceptable salt or solvate thereof, selected from the group consisting of
7-(2,6-dichlorobenzyl)-5-{[2-methoxy-4-(piperazin-l-yl)phenyl]amino}-2,3- dihy dropyrido [4,3 -d]py rimidin-4( 1 H) -one ;
7- (2,6-dichlorobenzyl)-5-{[2-methoxy-4-(piperazin- l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol;
8- (2,6-dichlorobenzyl)-6-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}- l ,2,3,4- tetrahydro-5H-pyrido[2,3-e][ l,4]diazepin-5-one; 8-(2,6-dichlorobenzy l)-6-{ [4-(piperazin-l -yl)phenyl]amino}- 1 ,2,3 ,4-tetrahydro-5H- py rido [2 ,3 -e] [ 1 ,4] diazepin-5 -one ;
7- (2,6-dichlorobenzyl)-5-{ [4-(piperazin- l-yl)phenyl]amino}pyrido[3,4-d]pyridazin-4- ol;
8- (2,6-dichlorobenzyl)-6-{[4-(piperazin-l-yl)phenyl]amino}-l,2,3,4-tetrahydro-5H- pyrido[4,3-e] [1.4]diazepin-5-one;
7-(2 )-dichlorobenzyl)-5-{[3-methyl-4-(piperazin-l -yl)phenv l)amino}pyrido[3,4- d]pyridazin-4(3 H)-one:
5-{ [4-(4-cyclohe.xylpiperazin- l -yl)-2-methoxyphenyl]amino}-7-(2.6- dichlorobenzyl)pyrido[3,4-d]pyridazin-4(3H)-one;
[4-(4-{ [7-(2,6-dichlorobenzyl)-4-hydroxypyrido[3,4-d]pyridazin-5-yl]amino}-3- methoxyphenyl)piperazin-l-yl](phenyl)methanone;
7-[(2,6-dichlorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-(2,6-dichlorobenzyl)-5-({2-methoxy-4-[4-(propan-2-ylsulfonyl)piperazin-l - yl]phenyl}amino)pyrido[3,4-d]pyridazin-4-ol;
l-[4-(4-{ [7-(2,6-dichlorobenzyl)-4-hydroxypyrido[3,4-d]pyridazin-5-yl]amino }-3- methoxyphenyl)piperazin-l -yl]-2-(dimethylamino)ethanone:
5-{ [3-chloro-4-(piperazin-l -yl)phenyl]amino}-7-(2,6-dichlorobenzyl)pyrido[3,4- d]pyridazin-4(3H)-one;
7-(2,6-dichlorobenzyl)-5-{ [5-(piperazin-l -yl)pyridin-2-yl]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
7-(2,6-dichlorobenzyl)-5-({2-methoxy-4-[4-(l -methylpiperidin-4-yl)piperazin- l- yl]phenyl}amino)pyrido[3.4-d]pyridazin-4(3H)-one;
7-(2,6-dichlorobenzyl)-5-({2-methoxy-4-[4-(3-methylbutyl)piperazin- l - yl]phenyl}amino)pyrido[3,4-d]pyridazin-4(3H)-one;
7-(2,6-dichlorobenzyl)-5-({2-methoxy-4-[2-(pyrrolidin-l - yl)ethyl]phenyl}amino)pyrido[3,4-d]pyridazin-4(3H)-one;
7-(2,6-dichlorobenzy l)-5 -( { 2-methoxy-4-{ 2-oxo-2-(py rrolidm- 1 - yl)ethyl]phenyl}amino)pyrido[3,4-d]pyridazin-4(3H)-one;
7-(2, 6-dichlorobenzy l)-5-( { 2-methoxy -4-[4-(3 -methy lbutanoy l)piperazin- 1 - yl]phenyl}amino)pyrido[3,4-d]pyridazin-4(3H)-one; 7-(2,6-dichlorobenzyl)-5-{ [2.5-difluoro-4-( ip^
d]py ridazin-4(3 H)-one ;
7-(2,6-dichlorobenzyl)-5-{ [2,6-dimethyl-4-(piperazin- l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol;
5-{[2-methoxy-4-(piperazin-l -yl)phenyl]amino}-7-{ [2-(propan-2- ylsulfonyl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
5-{[2-methoxy-4-( iperazin-l-yl)phenyl]amino}-7-{[(4R)-4-(propan-2-yl)-4,5- dihydro-l ,3-oxazol-2-yl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-[(2-chlorophenyl)amino]-5-{ [2-methoxy-4-(piperazin- l - yl)phenyl]amino}pyrido[3.4-d]pyridazin-4(3H)-one;
7-[(5-chloro-2-fluorophenyl)amino]-5-{ [2-methoxy-4-(piperazin- l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
7-(2,6-dichlorobenzyl)-5-{[2-fluoro-4-( iperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
7-[(2-chloro-5-fluorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l - y l)pheny ljamino }pyrido[3 ,4-d]pyridazin-4(3H)-one ;
7-[ (2,5 -dichloropheny l)amino]-5 - { [2-methoxy -4-(piperazin- 1 - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
7-[(2-chloro-6-fluoropheny l)amino] -5 - { [2-methoxy -4-(piperazin- 1 - y l)pheny 1] amino } py rido [3 ,4-d]py ridazin-4(3 H)-one ;
7-(2,6-dichlorobenzyl)-5-{[2-methoxy-4-(4-methylpiperazin-l- y l)pheny 1] amino } pyrido [3 ,4-d]py ridazin-4(3 H)-one ;
7-[(3,5-dichlorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l - y l)pheny l]amino } pyrido [3 ,4-d]py ridazin-4(3 H)-one ;
7-[(2,6-difluorophenyl)amino]-5-{ [2-methox -4-(piperazin- 1 - y )phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
7-[(3,5-dichloropyridin-4-yl)amino]-5-{ [2-methoxy -4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
7-[(2,4-dichloropheny l)amino]-5-{ [2-methox -4-(piperazin- 1 - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-[(2,6-dichloro-4-fluorophenyl)amino]-5-{ [2-methoxy -4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol; 7-[(2,3-difluorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l- y l)pheny l]amino} pyrido[3 ,4-d]pyridazin-4(3 H)-one;
7-[(furan-2-ylmethyl)amino]-5-{[2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
5-{ [2-methoxy -4-(piperazin-l -yl)phenyl]amino}-7-(piperidin-l -yl)pyrido[3,4- d]pyridazin-4(3H)-one;
7-(benzylamino)-5-{ [2-methoxy-4-(piperazin- l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
5-{ [2-methoxy -4-(piperazin- 1 -y l)phenyl]amino}-7-phenylpyrido[3,4-d]pyridazin- 4(3H)-one;
7-(2,6-dichlorobenzyl)-5-{ [2,6-difluoro-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
5-{ [2-methoxy -4-(piperazin- l -yl)phenyl]amino}-7-(pyridin-2-ylamino)pyrido[3, 4- d]pyridazin-4(3H)-one;
5 - { [2-methoxy -4-(piperazin- 1 -y l)pheny 1] amino } -7-(py ridin-3-y lamino)py rido[3,4- d]pyridazin-4(3H)-one;
7-(cycIohexyIamino)-5-{ [2-methoxy -4-(piperazin-l -y I)pheny l]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
5-{ [2-methox -4-(piperazin-l-yl)phenyl]amino}-7-{ [2-(pyridin-2- yl)ethyl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-[(2-fluorophenyl)amino]-5-{ [2-methoxy -4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one:
7-[(2.6-dimethylphenyl)amino]-5-{ [2-methoxy -4-(piperazin- l - yl)phenyl]amino}pyrido[3.4-d]pyridazin-4(3H)-one:
7-[(3-chloropyridin-2-yl)amino]-5-{[2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
7-[(2,3-dichlorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l- yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
5^{2-m^hoxy-4-(pipcrazm-l-yl)phenylJamino}-7-[(2,4,6- trifluorophenyl)amino]pyrido[3,4-d]pyridazin-4(3H)-one;
5-{[2-methoxy-4-(piperazin-l -yl)pheny l]amino}-7-[(2,3.4- trifluorophenyl)amino]pyrido[3,4-d]pyridazin-4(3H)-one; 7-[(3-chloro-2-fluoropheny l)amino]-5- { [2-methoxy-4-(piperazin- 1 - yl)phenyl]amino}pyrido[3,4-d]pyridaziii-4-ol;
5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]arnino}-7-(tetrahydro-2H-pyran-4- ylamino)pyrido[3,4-d]pyridazin-4-ol;
5-{ [2-methoxy-4-(piperazin- l -yl)phenyl]amino}-7-(l,3-thiazol-2-ylamino)pyrido[3)4- d]pyridazin-4(3H)-one;
5-{ [2-chloro-4-(piperazin-l-yl)phenyl]amino}-7-(2,6-dichlorobenzyl)pyrido[3,4- d]pyridazin-4(3H)-one;
5 - { [2-methoxy-4-(piperazin- 1 -y l)pheny l]amino } -7-[( 1 -methy lpiperidin-4- yl)amino]pyrido[3,4-d]pyridazin-4(3H)-one;
7-(2,6-dichlorobenzyl)-5-{ (3-fluoro-2-methoxy-4-(piperazin- l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-[(3-chloropyridin-4-yl)amino]-5-{[2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
5 -{ [2-bromo-4-(piperazin- 1 -y l)pheny l]amino} -7-(2,6-dichlorobenzy l)pyrido [3 ,4- d]pyridazin-4(3H)-one;
7-(2-chlorophenoxy)-5-{[2-methoxy-4-(piperazin- l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
7 2 >-dichlorophenoxy)-5-{ [2-methoxy-4-(piperaziri- l -yl)phenyl)amino}pyridol3,4- d]pyridazin-4(3H)-one:
7-(2,6-dichlorobenzyl)-5-{ [4-(piperazin- l -yl)-2- (trifluoromethoxy)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-[(2,3-dichloro-6-fluorophenyl)amino]-5-{[2-methoxy-4-(piperazin-l- yl)iphenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
7-(2,6-dichlorobenzyl)-5-{ [4-(hexahydropyrrolo[l ,2-a]pyrazin-2(lH)-yl)-2- methoxyphenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
7-[(2,3-dichloro-4-fluorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
2-{(2,6-dichloropheny l)amino}-4-{[2-methoxy-4-(ptperazin- 1 - yl)phenyl]amino}pyrido[2,3-d]pyridazin-5(6H)-one;
7-(2,6-dichlorobenzyl)-5-{ [2,3-dimethyl-4-(piperazin- l-yl)phenyl]amino}pyrido[3.4- d]pyridazin-4(3H)-one; 2-(2,6-dichlorobenzyl)-4-{ [2-methoxy-4-(piperazin-l-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one;
7-[(2-chloro-4,6-difluorophenyl)amino]-5-{ [2-methoxy-4-(piperazin-l - yl)phenyl]amino}pyrido[3,4-d]pyridaziii-4-ol;
7-(2,6-dichlorobenzyl)-5-{ [2-methoxy-5-methyl-4-(piperazin- l- y l)pheny l]amino }py rido [3 ,4-d]py ridazin-4(3 H)-one ;
7-(2,6-dichlorobenzy l)-5 -{ [2-fluoro-5 -methy l-4-(piperazin- 1 - y l)pheny ljamino }py rido [3 ,4-d]py ridazin-4(3 H)-one ;
6- (2,6-dichlorobenzyl)-8-[(6-methoxy-l ,2,3,4-tetrahydroisoquinolin-7- yl)amino]phthalazin-l (2H)-one;
7- (2,6-difluorophenoxy)-5-{ [2-methoxy-4-(piperazin-l-yl)phenyl]amino}pyrido[3,4- d)pyridazin-4(3H)-one;
7-(2-fluorophenoxy)-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino }pyrido[3,4- d]pyridazin-4-ol;
5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}-7-[(2,3,4- trichlorophenyl)amino]pyrido[3,4-d]pyridazin-4(3H)-one;
7-(2,3-difluorophenoxy)-5-{ [2-methoxy-4-(piperazin-l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol;
7-(2,3-dichlorophenoxy)-5-{ [2-methoxy-4-( iperazin-l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
7-(2,6-dichloro-4-fluorophenoxy)-5-{ [2-methoxy-4-(piperazin- l - y pheny ljamino } py rido [3 ,4-d]py ridazin-4(3 H)-one ;
7-[(3-chloropyridin-4-yl)oxy]-5-{ [2-methoxy-4-(piperazin-l - y l)pheny ljamino } py rido[3 ,4-d]py ridazin-4(3 H)-one ;
7-(2,3-dimethylphenoxy)-5-{[2-methoxy-4-(piperazin-l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol;
7-[(3-fluoropyridin-4-yl)oxy]-5-{[2-methoxy-4-(piperazin-l - y l)pheny 1] amino } py rido [3 ,4-d]pyridazin-4-ol ;
5 - {[2-methoxy -4-(piperazin- 1 -y l)pheny ljamino } -7-(2 ,3,4- trichlorophenoxy)pyrido[3,4-d]pyridazin-4-ol;
7-(2,4-dichlorophenoxy)-5-{ [2-methoxy-4-(piperazin- l -y Opheny l]amino}py rido[3,4- d]pyridazin-4(3H)-one; 7-[(trans-4-hydroxycyclohexyl)amino]-5-{ [2-methoxy-4-(piperazin-l- yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
7-(cyclopentyloxy)-5-{ [2-methoxy-4-(piperazin-l -yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol;
7-(2,6-dichlorobenzyl)-5-[(7-methoxy-l ,2,3,4-tetrahydroisoquinolin-6- yl)amino]pyrido|3,4-d]pyridazin-4(3H)-one;
2-(2-chlorophenoxy )-4- { [2-methox -4-(piperazin- 1 -y Opheny 1 )amino } py rido [2.3 - d]pyridazin-5(6H)-one;
5-{ [2-chloro-4-( yn-olidin- l-ylmethyl)phenyl]amino}-7-(4-fluoropiperidin-l - yl)pyrido[3,4-d]pyridazin-4-ol;
2-(2-chlorobenzyl)-4-[(6-methoxy-l ,2,3,4-tetrahydroisoquinolin-7- yl)amino]pyrido[2,3-d]pyridazin-5-ol;
2-(2-chlorobenzyl)-4-{[2-methoxy-4-(piperazin- l - ylmethyl)phenyl]amino}pyrido[2,3-d]pyridazin-5(6H)-one;
5-{ [2-chloro-4-(pyrrolidin- l -y Imethy l)phenyl]amino}-7- [(cyclopropy Imethy l)amino]pyrido[3,4-d]pyridazin-4-ol;
2-(2-chlorobenzy l)-4- { [2-methoxy -4-(morpholin-4- ylmethyl)phenyl]amino}pyrido[2,3-d]pyridazin-5-ol;
7-(2-chlorophenoxy)-5-{ [2-ethoxy-4-(pyrrolidin-l - ylmethyl)phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one;
5 - { [2-chloro-4-(pyrrolidin- 1 -y Imethy l)pheny ljamino } -7-(4-hy droxy piperidin- 1 - yl)pyrido[3,4-d]pyridazin-4(3H)-one;
5-{ [2-chloro-4-(pyrrolidin-l -y Imethy l)pheny ljamino }-7-(3-hy droxy azetidin-1 - yl)pyrido[3,4-d]pyridazin-4(3H)-one;
7-(2-chlorophenoxy)-5-{ [2-methoxy -4-(piperidin-4-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol;
7-[(cyclopropy Imethy l)amino]-5-{ [2-methoxy -4-(piperidin-4- yl)phenyl]amino}pyrido[3,4-d]pyridazin-4-ol;
2^2-chkwc^nzyl)-4-{[2-methoxy^-(piper!din-4-yl)phenyi]ammo}pyrido[2,3- d]pyridazin-5(6H)-one;
2-(2,6-dichlorobenzyl)-4-{ [2-methoxy -4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one; 4- { [2-methox -4-(piperidill-4- ])phen ]]amino }-2-[2-(rno holin-4- yl)ethyl]pyrido[2,3-d]pyridazin-5(6H)-one:
7-(2-chlorophenoxy )-5 - { [ 5-(piperazin- 1 -y l)py ridin-2-y l]amino }py rido[3 ,4- d]pyridazin-4(3H)-one;
2-(2-cyclopropylethyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one;
(4-{ [7-(2-chlorophenoxy)-4-hydroxypyrido[3,4-d]pyridazin-5-yl]atnino}-3- methoxyphenyl)(pyrrolidin-l -yl)methanone:
7-(2-chlorophenoxy)-5-{ [2-ethoxy-4-( iperidin-4-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4(3H)-one;
2-(2-fluorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2.3- dlpyridazin-5(6H)-one;
2-(2 -dichlorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]pyridazin-5(6H)-one;
2-(2,6-difluorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-yl)phenyl]amino}pyrido[2,3- d]py ridazin-5 (6H)-one;
2-(2,5-difluorobenzyl)-4-{ [2-methoxy-4-(piperidin-4-y l)phenyl]arnino}pyrido[2,3- d] py ridazin-5 (6 H)-one ;
2-(2,3-difluorobenzyl)-4-{ [2-metJioxy-4-(piperidin-4-yl)phenyl]arnino}pyrido[2,3- d]pyridazin-5(6H)-one;
2-(2-chloro-6-fluorobenzyl)-4-{[2-methoxy-4-(piperidin-4- yl)phenyl]amino}pyrido[2,3-d]pyridazin-5(6H)-one;
5- [(2-methoxyphenyl)amino]-7-{[4-( iperazin- l-yl)phenyl]amino}pyrido[3,4- d]pyridazin-4-ol;
7-(2-chlorophenoxy)-5-{[2-ethoxy-4-(piperazin- l -yl)phenyl]amino}pyrido[3.4- d]pyridazin-4-ol;
2-[(5-{ [2-methoxy-4-^iperazin- l -yl)phenyl]amino}-4-oxo-3,4-dihydropyrido[3,4- d]pyridazin-7-yl)oxy]benzonitrile:
2-(2-chlorobenzyl)-4-({2-methoxy-4-[(4-methylpiperazin-l- yl)methyl]phenyl}amino)pyrido[2,3-d]pyridazin-5(6H)-one;
7-(2-chlorophenoxy)-5-{[2-(difluoromethoxy)-4-(piperazin- l - y])phenyl]amino}pyrido[3,4-d]pyridazin-4(3H)-one; 7-(2-chlorophenoxy)-5-{[5-( iperidin-4-yl)py
d]pyridazin-4(3H)-one;
7-(2-chlorophenoxy )-5- { [2-methoxy -4-(piperazin- 1 -y l)pheny ljamino} - 1 - methylpyrido[3.4-d]pyridazin-4-ol, and
2-{ [7-(2-chlorophenoxy)-4-hydroxypyrido[3,4-d]pyridazin-5-yl]amino}-5-(piperazin- l -yl)benzonitrile.
15. A pharmaceutical composition comprising a compound or pharmaceutically acceptable salt of claim 1 and pharmaceutically acceptable excipient.
16. A method of treating cancer in a mammal comprising administering thereto a therapeutically acceptable amount of a compound or pharmaceutically acceptable salt of claim 1.
17. A method for decreasing tumor volume in a mammal comprising
administering thereto a therapeutically acceptable amount of a compound or pharmaceutically acceptable salt of claim 1.
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