WO2005023251A1 - N3 alkylated benzimidazole derivatives as mek inhibitors - Google Patents
N3 alkylated benzimidazole derivatives as mek inhibitors Download PDFInfo
- Publication number
- WO2005023251A1 WO2005023251A1 PCT/US2004/027199 US2004027199W WO2005023251A1 WO 2005023251 A1 WO2005023251 A1 WO 2005023251A1 US 2004027199 W US2004027199 W US 2004027199W WO 2005023251 A1 WO2005023251 A1 WO 2005023251A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluoro
- phenylamino
- bromo
- chloro
- aryl
- Prior art date
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- 239000002829 mitogen activated protein kinase inhibitor Substances 0.000 title abstract description 5
- 125000003785 benzimidazolyl group Chemical class N1=C(NC2=C1C=CC=C2)* 0.000 title description 2
- 150000001875 compounds Chemical class 0.000 claims abstract description 140
- 238000000034 method Methods 0.000 claims abstract description 75
- 150000003839 salts Chemical class 0.000 claims abstract description 43
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- 229940002612 prodrug Drugs 0.000 claims abstract description 24
- 239000000651 prodrug Substances 0.000 claims abstract description 24
- 230000003463 hyperproliferative effect Effects 0.000 claims abstract description 15
- -1 phosphoryloxymethyloxycarbonyl Chemical group 0.000 claims description 69
- 125000000623 heterocyclic group Chemical group 0.000 claims description 61
- 125000003118 aryl group Chemical group 0.000 claims description 56
- 125000001072 heteroaryl group Chemical group 0.000 claims description 53
- 229910052736 halogen Inorganic materials 0.000 claims description 40
- 150000002367 halogens Chemical group 0.000 claims description 40
- 239000000203 mixture Substances 0.000 claims description 40
- 125000000217 alkyl group Chemical group 0.000 claims description 35
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 34
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- 125000004446 heteroarylalkyl group Chemical group 0.000 claims description 32
- 125000004415 heterocyclylalkyl group Chemical group 0.000 claims description 31
- 125000000876 trifluoromethoxy group Chemical group FC(F)(F)O* 0.000 claims description 31
- 229910052739 hydrogen Inorganic materials 0.000 claims description 30
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- 125000001153 fluoro group Chemical group F* 0.000 claims description 2
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- LNPDTQAFDNKSHK-UHFFFAOYSA-N valdecoxib Chemical compound CC=1ON=C(C=2C=CC=CC=2)C=1C1=CC=C(S(N)(=O)=O)C=C1 LNPDTQAFDNKSHK-UHFFFAOYSA-N 0.000 description 1
- 229960002004 valdecoxib Drugs 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical class CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 229960004295 valine Drugs 0.000 description 1
- 125000002987 valine group Chemical group [H]N([H])C([H])(C(*)=O)C([H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229960003048 vinblastine Drugs 0.000 description 1
- JXLYSJRDGCGARV-XQKSVPLYSA-N vincaleukoblastine Chemical compound C([C@@H](C[C@]1(C(=O)OC)C=2C(=CC3=C([C@]45[C@H]([C@@]([C@H](OC(C)=O)[C@]6(CC)C=CCN([C@H]56)CC4)(O)C(=O)OC)N3C)C=2)OC)C[C@@](C2)(O)CC)N2CCC2=C1NC1=CC=CC=C21 JXLYSJRDGCGARV-XQKSVPLYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 208000013013 vulvar carcinoma Diseases 0.000 description 1
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- C07D235/04—Benzimidazoles; Hydrogenated benzimidazoles
- C07D235/06—Benzimidazoles; Hydrogenated benzimidazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached in position 2
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- C07D235/04—Benzimidazoles; Hydrogenated benzimidazoles
- C07D235/24—Benzimidazoles; Hydrogenated benzimidazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 2
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- 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
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- C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
- C07D405/12—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a chain containing hetero atoms as chain links
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- C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
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- C07D417/06—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
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- C07D417/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a chain containing hetero atoms as chain links
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- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
- C07F9/645—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having two nitrogen atoms as the only ring hetero atoms
- C07F9/6503—Five-membered rings
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- C07F9/65586—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom containing at least two different or differently substituted hetero rings neither condensed among themselves nor condensed with a common carbocyclic ring or ring system at least one of the hetero rings does not contain nitrogen as ring hetero atom
Definitions
- This invention relates to a series of alkylated (lH-Benzoimidazol-5-y ⁇ )-(4- 5 substituted-phenyl)-amine derivatives that are useful in the treatment of hyperproliferative diseases, such as cancer and inflammation, in mammals.
- This invention also relates to a method of using such compounds in the treatment of hyperproliferative diseases in mammals, especially humans, and to pharmaceutical compositions containing such compounds.
- the application claims priority of U.S. Application No. 10/652,733 10 filed August 29, 2003, which is incorporated herein by this reference in its entirety. 2.
- Ras/ Raf kinase pathway One of the most important and most well understood MAP kinase pathways involved in normal and uncontrolled cell growth is the Ras/ Raf kinase pathway. Active GTP-bound Ras results in the activation and indirect phosphorylation of Raf kinase. Raf then phosphorylates MEK1 and 2 on two serine residues (S218 and S222 for MEK1 and S222and S226 for MEK2) (Ahn et al, Methods in Enzymology 2001, 332, 417-431).
- Activated MEK then phosphorylates its only known substrates, the MAP kinases, ERKl and 2.
- ERK phosphorylation by MEK occurs on Y204 and T202 for ERKl and Y185 and T183 for ERK2 (Ahn et al., Methods in Enzymology 2001, 332, 417-431).
- Phosphorylated ERK dimerizes and then translocates to the nucleus where it accumulates (Khokhlatchev et al., Cell 1998, 93, 605-615). In the nucleus, ERK is involved in
- small molecule MEK inhibitors have been shown to inhibit human tumor growth in nude mouse xenografts, (Sebolt-Leopold et al, Nature-Medicine 1999, 5 (7), 810-816; Trachet et al., AACR April 6-10, 2002, Poster #5426; Tecle, H. LBC 2 nd lhternat'l Conference of Protein Kinases, Sep. 9-10, 2002), block static allodynia in animals (WO 01/05390 published Jan. 25, 2001) and inhibit growth of acute myeloid leukemia cells (Milella et al, J Clin Invest 2001, 108 (6), 851-859). Small molecule inhibitors of MEK have been disclosed.
- This invention provides for alkylated (lH-benzoimidazol-5-yl)-(4-substituted phenyl)-amine compounds of formula I, and pharmaceutically acceptable salts and prodrugs thereof that are useful in the treatment of hyperproliferative diseases.
- the present invention relates to compounds of formula I that act as MEK inhibitors.
- a method for treatment of cancer Also provided are formulations containing compounds of formula I and methods of using the compounds to treat a patient in need thereof.
- R 1 , R 2 , R 9 and R 10 are independently selected from hydrogen, halogen, cyano, nitro, trifluoromethyl, difluoromethoxy, trifluoromethoxy, azido, -OR 3 , -C(O)R 3 ,
- ⁇ DE - 80248/0027 - 213332 vl independently selected from oxo, halogen, cyano, nitro, trifluoromethyl, difluoromethoxy, trifluoromethoxy, azido, -NR 4 SO 2 R 6 , -SO 2 NR 3 R 4 , -C(O)R 3 , -C(O)OR 3 , -OC(O)R 3 , -NR 4 C(O)OR 6 , -NR 4 C(O)R 3 , -C(O)NR 3 R 4 , -NR 3 R 4 , -NR 5 C(O)NR 3 R 4 , -NR 5 C(NCN)NR 3 R 4 , -OR 3 , aryl, heteroaryl, arylalkyl, heteroarylalkyl, heterocyclyl, and heterocyclylalkyl; R 3 is selected from hydrogen, trifluoromethyl, C1-C1 0 alkyl, C 2
- R', R" and R'" independently are selected from hydrogen, lower alkyl, lower alkenyl, aryl and arylalkyl; R 3 and R 4 can be taken together with the atom to which they are attached to form a 4 to 10 membered carbocyclic, heteroaryl or heterocyclic ring, each of which is optionally substituted with one to three groups independently selected from halogen, cyano, nitro, trifluoromethyl, difluoromethoxy, trifluoromethoxy, azido, -NR SO 2 R , -SO 2 NR ' R " , -C(O)R , -C(O)OR , -OC(0)R ' ,
- R 6 is selected from trifluoromethyl, C ⁇ -C 10 alkyl, C 3 -C 10 cycloalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl, heterocyclyl, heterocyclylalkyl, where each alkyl, cycloalkyl, aryl, heteroaryl and heterocyclyl portion is optionally substituted with one to five groups independently selected from oxo, halogen, cyano, nitro, trifluoromethyl, difluoromethoxy, trifluoromethoxy, azido, -NR ' SO 2 R " , -SO 2 NR ' R " , -C(O)R ' , -C(O)OR ' S -OC(O)R ' , -NR ' C(0)0R", -NR C(O)R " , -C(O)NR ' R "
- NR 4 (CR 4 R 5 ) m -heterocyclyl where each alkyl, alkenyl, alkynyl, cycloalkyl, aryl,
- ⁇ DE - 80248/0027 - 213332 vl 5 heteroaryl and heterocyclyl portion is optionally substituted with one to five groups independently selected from oxo, halogen, cyano, nitro, trifluoromethyl, difluoromethoxy, trifluoromethoxy, azido, -NR 4 SO 2 R 6 , -SO 2 NR 3 R 4 , -C(O)R 3 , -C(O)OR 3 , -OC(O)R 3 , -NR 4 C(O)OR 6 , -NR 4 C(O)R 3 , -C(O)NR 3 R 4 , -NR 3 R 4 , -NR 5 C(O)NR 3 R 4 , -NR 5 C(NCN)NR 3 R 4 , -OR 3 , aryl, heteroaryl, arylalkyl, heteroarylalkyl, heterocyclyl, and heterocyclylalkyl; m is 0, 1, 2,
- novel compounds encompassed by the instant invention are those described by the general formula I set forth above, and the pharmaceutically acceptable salts and prodrugs thereof.
- the present invention also provides compounds of formula I in which R is Ci- C1 0 alkyl, C 3 -C 7 cycloalkyl, C 3 -C 7 cycloalkylalkyl, C 3 -C 7 heterocycloalkyl or C 3 -C heterocycloalkylalkyl each of which can be optionally substituted with 1 - 3 groups independently selected from oxo, halogen, cyano, nitro, trifluoromethyl, difluoromethoxy, trifluoromethoxy, azido, -NR 4 SO 2 R 6 , -SO 2 NR 3 R 4 , -C(O)R 3 , -C(O)OR 3 , -OC(O)R 3 , -SO 2 R 3 , -NR 4 C(O)OR 6
- the present invention also provides compounds of formula I, wherein R 8 is -OCF3, Br or CI, R 2 is hydrogen, and R 1 is lower alkyl or halogen.
- R 8 is -OCF3, Br or CI
- R 2 is hydrogen
- R 1 is lower alkyl or halogen.
- R 9 is hydrogen or halogen, and R 10 is hydrogen.
- W is hydrogen
- R 7 is - o alkyl, C 3 -C cycloalkyl or C 3 -C 7 cycloalkylalkyl, each of which can be optionally substituted with 1 - 3 groups independently selected from oxo, halogen, cyano, nitro, trifluoromethyl, difluoromethoxy, trifluoromethoxy, azido, -NR 4 SO 2 R 6 , -SO NR 3 R 4 , -C(O)R 3 , -C(O)OR 3 , -OC(O)R 3 , -SO 2 R 3 , -NR 4 C(O)OR 6 , -NR 4 C(O)R 3 , -C(O)NR 3 R 4 , --
- the present invention also provides compounds of formula 13, wherein R 8 is -OCF 3 , Br or CI, and R 1 is lower alkyl or halogen.
- the present invention also provides compounds of formula LI, wherein R 9 is hydrogen or halogen, and R 10 is hydrogen.
- the present invention also provides compounds of formula II, wherein W is
- R is Q- C1 0 alkyl, C 3 -C 7 cycloalkyl or C 3 -C 7 cycloalkylalkyl, each of which can be optionally substituted with 1 - 3 groups independently selected from oxo, halogen, cyano, nitro, trifluoromethyl, difluoromethoxy, trifluoromethoxy, azido, -NR 4 SO R 6 , -SO 2 NR 3 R 4 , -C(O)R 3 , -C(O)OR 3 , -OC(O)R 3 , -SO 2 R 3 , -NR 4 C(O)OR 6 , -NR 4 C(O)R 3 , -C(O)NR 3 R 4 , - NR 3 R 4 , -NR 5 C(O)NR 3 R 4 , -NR 5 C(NCN)NR 3 R 4 , -OR 3 , aryl, heteroaryl
- the present invention also provides compounds of formula III, wherein R is hydrogen or halogen.
- the present invention also provides compounds of formula III, wherein R 3 is hydrogen or lower alkyl when A is -OR 3 , and R 4 is hydrogen when A is -NR 4 OR 3 .
- the present invention also provides compounds of formula Ilia:
- R , R , R , R and R are as defined above for formula I, and A is -OR or -NR 4 OR 3 , wherein R 3 and R 4 are as defined above for formula I.
- the present invention also provides compounds of formula Ilia in which R 7 is -
- the present invention also provides compounds of formula Ilia, wherein R is -OCF 3 , Br or CI, R 2 is hydrogen, and R 1 is lower alkyl or halogen.
- R 9 is hydrogen or halogen.
- R is sn or lower allcyl when A is -OR 3 , and R 4 is hydrogen when A is -NR 4 OR 3 .
- the present invention also provides compounds of formula IHb:
- R , ⁇ , R , R and R are as defined above for formula I, and A is -OR or -NR 4 OR 3 , wherein R 3 and R 4 are as defined above for formula I.
- the present invention also provides compounds of formula Illb in which R is C 1 -C10 allcyl, C 3 -C 7 cycloalkyl or C 3 -C 7 cycloalkylalkyl, each of which can be optionally substituted with 1 - 3 groups independently selected from oxo, halogen, cyano, nitro, trifluoromethyl, difluoromethoxy, trifluoromethoxy, azido, -NR 4 SO 2 R 6 , -SO NR 3 R 4 , -C(O)R 3 , -C(O)OR 3 , -OC(O)R 3 , -SO 2 R 3 , -NR 4 C(O)OR 6 , -NR 4 C(O)R 3 , -C(O)OR
- the present invention also provides compounds of formula Ilia, wherein R 8 is -OCF 3 , Br or CI, and R 1 is lower allcyl or halogen.
- the present invention also provides compounds of formula III, wherein R 9 is fluoro or chloro.
- the present invention also provides compounds of formula III, wherein R 3 is hydrogen or lower alkyl when A is -OR 3 ; and R 4 is hydrogen when A is -NR 4 OR 3 . Except as expressly defined otherwise, the following definition of terms is employed throughout this specification.
- C1-C1Q alkyl straight or branched chain alkyl groups having 1-10 carbon atoms, such as, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, pentyl, 2-pentyl, isopentyl, neopentyl, hexyl, 2-hexyl, 3-hexyl, 3-methylpentyl, heptyl, octyl, and the like.
- Preferred alkyl radicals are C 1-6 allcyl. More preferred allcyl radicals are C 1-3 allcyl.
- C -C 10 alkenyl means straight and branched hydrocarbon radicals having from 2 to 10 carbon atoms and at least one double bond and includes ethenyl, propenyl, l-but-3-enyl, l-pent-3-enyl, l-hex-5-enyl and the like. More preferred are lower alkenyl having 3-5 carbon atoms.
- C -Ci 0 alkynyl means straight and branched hydrocarbon radicals having from 2 to 10 carbon atoms and at least one triple bond and includes ethynyl, propynyl, butynyl, pentyn-2-yl and the like. More preferred are alkynyl having 3-5 carbon atoms.
- halogen in the present invention is meant fluorine, bromine, chlorine, and iodine.
- aryl is meant an aromatic carbocyclic group having a single ring (e.g., phenyl), multiple rings (e.g., biphenyl), or multiple condensed rings in which at least one is aromatic, (e.g., 1,2,3,4-tetrahydronaphthyl, naphthyl), which is optionally mono-, di-, or trisubstituted with, e.g., halogen, lower allcyl, lower alkoxy, trifluoromethyl, aryl, heteroaryl, and hydroxy.
- heteroaryl is meant one or more aromatic ring systems of 5-, 6-, or 7- membered rings which includes fused ring systems (at least one of wliich is aromatic) of 5-10 atoms containing at least one and up to four heteroatoms selected from nitrogen, oxygen, or sulfur.
- heteroaryl groups are pyridinyl, imidazolyl, pyrimidinyl, pyrazolyl, triazolyl, pyrazinyl, tetrazolyl, furyl, thienyl, isoxazolyl, thiazolyl, oxazolyl, isothiazolyl, pyrrolyl, quinolinyl, isoquinolinyl, indolyl, benzimidazolyl, benzofliranyl, cinnolinyl, indazolyl, indolizinyl, phthalazinyl, pyridazinyl, triazinyl, isoindolyl,
- Heteroaryl groups are optionally mono-, di-, or trisubstituted with, e.g., halogen, lower allcyl, lower alkoxy, haloalkyl, aryl, heteroaryl, and hydroxy.
- the term "carbocycle,” “carbocyclyl,” “cycloalkyl” or “C 3 -C 10 cycloalkyl” refers to saturated carbocyclic radicals having three to ten carbon atoms.
- the cycloalkyl can be monocyclic, or a polycyclic fused system, and can be fused to an aromatic ring.
- radicals include cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl.
- the cycloalkyl groups herein are unsubstituted or, as specified, substituted in one or more substitutable positions with various groups.
- such cycloalkyl groups may be optionally substituted with, for example, C ⁇ -C 6 allcyl, - C 6 alkoxy, halogen, hydroxy, cyano, nitro, amino, mono(C 1 -C 6 )alkylamino, di(C ⁇ - C 6 )allcylamino, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, Ci-C ⁇ haloalkyl, C ⁇ -C 6 haloallcoxy, amino(Ci-C 6 )alkyl, mono(C 1 -C 6 )alkylamino(C 1 -C 6 )allcyl or di(C 1 -C 6 )alkylamino(C 1 - C 6 )allcyl.
- heterocycle or “heterocyclyl” is meant one or more carbocyclic ring systems of 5-, 6-, or 7-membered rings which includes fused ring systems of 4-10 atoms containing at least one and up to four heteroatoms selected from nitrogen, oxygen, or sulfur, and with the proviso that the ring of the group does not contain two adjacent O or S atoms.
- a fused system can be a heterocycle fused to an aromatic group.
- Preferred heterocycles include, but are not limited to, pyrrolidinyl, tetrahydrofuranyl, dihydrofuranyl, tetrahydrothienyl, tetrahydropyranyl, dihydropyranyl, tetrahydrothiopyranyl, piperidino, morpholino, thiomorpholino, thioxanyl, piperazinyl, homopiperazinyl, azetidinyl, oxetanyl, thietanyl, homopiperidinyl, oxepanyl, thiepanyl, oxazepinyl, diazepinyl, thiazepinyl, 1,2,3,6-tetrahydropyridinyl, 2-pyrrolinyl, 3- pyrrolinyl, indolinyl, 2H- ⁇ yranyl, 4H-pyranyl, dioxanyl, 1,3-dioxolany
- ⁇ DE - 80248/0027 - 213332 vl * * derived from the groups listed above may be C-attached or N-attached where such is possible.
- a group derived from pyrrole may be pyrrol- 1-yl (N-attached) or pyrrol-3-yl (C-attached).
- a group derived from imidazole may be imidazol-1-yl (N-attached) or imidazol-3-yl (C-attached).
- heterocycle groups herein are unsubstituted or, as specified, substituted in one or more substitutable positions with various groups.
- such heterocycle groups may be optionally substituted with, for example, Ci-C ⁇ alkyl, Ci-C ⁇ alkoxy, halogen, hydroxy, cyano, nitro, amino, mono(C 1 -C 6 )alkylamino, di(d- C 6 )alkylamino, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, C ⁇ -C 6 haloalkyl, C ⁇ -C 6 haloalkoxy, amino(C ⁇ -C 6 )allcyl, mono(C 1 -C 6 )alkylamino(C 1 -C 6 )alkyl or di(C 1 -C 6 )alkylamino(C 1 - C 6 )alkyl.
- arylalkyl means an alkyl moiety (as defined above) substituted with one or more aryl moiety (also as defined above). More preferred arylalkyl radicals are aryl-C 1-3 -alkyls. Examples include benzyl, phenylethyl, and the like.
- heteroarylalkyl means an allcyl moiety (as defined above) substituted with a heteroaryl moiety (also as defined above). More preferred heteroarylalkyl radicals are 5- or 6-membered heteroaryl-C 1-3 -alkyls. Examples include, oxazolylmethyl, pyridylethyl and the like.
- heterocyclylalkyl means an alkyl moiety (as defined above) substituted with a heterocyclyl moiety (also defined above). More preferred heterocyclylalkyl radicals are 5- or 6-membered heterocyclyl-C 1-3 -alkyls. • Examples include tetrahydropyranylmethyl.
- cycloalkylalkyl means an allcyl moiety (as defined above) substituted with a cycloalkyl moiety (also defined above). More preferred heterocyclyl radicals are 5- or 6-membered cycloalkyl-C 1-3 -alkyls. Examples include cyclopropylmethyl.
- ⁇ DE- 80248/0027- 213332 vl 12 are basic in nature are capable of forming a wide variety of salts with various inorganic and organic acids.
- the acids that may be used to prepare pharmaceutically acceptable acid addition salts of such basic compounds of the present invention are those that form non-toxic acid addition salts, i.e., salts containing pharmaceutically acceptable anions, such as the acetate, benzenesulfonate, benzoate, bicarbonate, bisulfate, bitartrate, borate, bromide, calcium, camsylate, carbonate, chloride, clavulanate, citrate, dihydrochloride, edislyate, estolate, esylate, ethylsuccinate, fumarate, gluceptate, gluconate, glutamate, glycollylarsanilate, hexylresorcinate, hydrabamine, hydrobromide, hydrochloride, iodide, isothionat
- a single compound of the present invention may include more than one acidic or basic moieties, the compounds of the present invention may include mono, di or tri-salts in a single compound.
- a salt may be formed by treatment of a compound of the present invention with a basic compound, particularly an inorganic base.
- Preferred inorganic salts are those formed with alkali and alkaline earth metals such as lithium, sodium, potassium, barium and calcium.
- Preferred organic base salts include, for example, ammonium, dibenzylammonium, benzylammonium, 2-hydroxyethylammonium, bis(2-hydroxyethyl)ammonium, phenylethylbenzylamine, dibenzyl-ethylenediamine, and the like salts.
- Other salts of acidic moieties may include, for example, those salts formed with procaine, quinine and N-methylglusoamine, plus salts formed with basic amino acids such as glycine, omithine, histidine, phenylglycine, lysine and arginine.
- An especially preferred salt is a sodium or potassium salt of a compound of the present invention.
- a salt is formed by the treatment of a compound of the present invention with an acidic compound, particularly an inorganic acid.
- Preferred inorganic salts of this type may include, for example, the hydrochloric, hydrobromic, hydroiodic, sulfuric, phosphoric or the like salts.
- Preferred organic salts of this type may include, for example, salts formed with formic, acetic, succinic, citric, lactic, maleic, fumaric, palmitic, cholic, pamoic, mucic, D-glutamic, D-camphoric, glutaric, glycolic,
- An especially preferred salt of this type is a hydrochloride or sulfate salt of a compound of the present invention.
- compounds of the present invention where terms such as (CR 4 R 5 ) m or
- R 4 and R 5 may vary with each iteration of m or t above 1.
- the terms (CR 4 R 5 ) m or (CR 4 R 5 ) t may equal -CH 2 CH 2 - or -CH(CH 3 )C(CH 2 CH 3 )(CH 2 CH 2 CH 3 )- or any number of similar moieties falling within the scope of the definitions of R 4 and R 5 .
- Certain compounds of the present invention may have asymmetric centers and therefore exist in different enantiomeric forms. All optical isomers and stereoisomers of the compounds of the present invention, and mixtures thereof, are considered to be within the scope of the invention.
- the invention includes the use of a racemate, one or more enantiomeric forms, one or more diastereomeric forms, or mixtures thereof.
- the compounds of the present invention may also exist as tautomers. This invention relates to the use of all such tautomers and mixtures thereof.
- the subject invention also includes isotopically-labeled compounds, which are identical to those recited in the present invention, but for the fact that one or more atoms are replaced by an atom having an atomic mass or mass number different from the atomic mass or mass number usually found in nature.
- isotopes that can be incorporated into compounds of the invention include isotopes of hydrogen, carbon, nitrogen, oxygen, phosphorous, sulfur, fluorine and chloride, such as H, H, C, C, 15 N, 18 O, 17 O, 31 P, 32 P, 35 S, 18 F, and 36 C1, respectively.
- Compounds of the present invention, prodrugs thereof, and pharmaceutically acceptable salts of said compounds or of said prodrugs which contain the aforementioned isotopes and/or other isotopes of other atoms are within the scope of this invention.
- isotopically-labeled compounds of the present invention for example those into which radioactive isotopes such as 3 H and 14 C are incorporated, are useful in drug and/or substrate tissue distribution assays.
- Tritiated, i.e., 3 H and carbon-14, i.e., 14 C, isotopes are particularly preferred for their ease of preparation and detectability. Futher, substitution with heavier isotopes such as deuterium, i.e., H, can afford certain therapeutic advantages resulting from
- Isotopically labeled compound of the present invention and prodrugs thereof can generally be prepared by carrying out procedures disclosed in the Schemes and/or in the Examples and 5 Preparations below, by substituting a readily available isotopically labeled reagent for a non-isotopically labeled reagent.
- This invention also encompasses pharmaceutical compositions containing a prodrugs of compound of formulas I-IIlb, and methods of treating proliferative disorders, or abnormal cell growth by administering prodrugs of compounds of the present
- Prodrugs include compounds wherein an amino acid residue, or a polypeptide chain of two or more (e.g., two, three or four) amino acid residues is covalently joined through an amide or ester bond to a free amino, hydroxy or carboxylic acid group of compounds of the present invention.
- 15 acid residues include but are not limited to the 20 naturally occurring amino acids commonly designated by three letter symbols and also includes 4-hydroxyproline, hydroxylysine, dernosine, isodemosine, 3-methylhistidine, norvaline, beta-alanine, gamma-aminobutyric acid, cirtulline, homocysteine, homoserine, omithine and methionine sulfone.
- One preferred prodrug comprises a compound of this invention
- prodrugs 20 covalently coupled to a valine residue.
- Additional types of prodrugs are also encompassed.
- free carboxyl groups can be derivatized as amides or alkyl esters.
- Free hydroxy groups may be derivatized using groups including but not limited to hemisuccinates, phosphate esters, dimethylaminoacetates, and phosphoryloxymethyloxycarbonyls, as outlined in Advanced Drug Delivery Reviews
- Carbamate prodrugs of hydroxy and amino groups are also included, as are carbonate prodrugs, sulfonate esters and sulfate esters of hydroxy groups.
- ⁇ DE - 80248/0027 - 213332 vl ⁇ L J including but not limited to ether, amine and carboxylic acid functionalities. It is to be understood that in instances where two or more radicals are used in succession to define a substituent attached to a structure, the first named radical is considered to be terminal and the last named radical is considered to be attached to the structure in question. Thus, for example, the radical arylalkyl is attached to the structure in question by the alkyl group.
- the invention also relates to a pharmaceutical composition for the treatment of a hyperproliferative disorder in a mammal which comprises a therapeutically effective amount of a compound of the present invention, or a pharmaceutically acceptable salt, prodmg or hydrate thereof, and a pharmaceutically acceptable carrier.
- said pharmaceutical composition is for the treatment of cancer such as brain, lung, squamous cell, bladder, gastic, pancreatic, breast, head, neck, renal, kidney, ovarian, prostate, colorectal, esophageal, testicular, gynecological or thyroid cancer.
- said pharmaceutical composition is for the treatment of a non- cancerous hyperproliferative disorder such as benign hyperplasia of the skin (e.g., psoriasis), restenosis, or prostate (e.g., benign prostatic hypertrophy (BPH)).
- a pharmaceutical composition for the treatment of pancreatitis or kidney disease (including proliferative glomemlonephritis and diabetes- induced renal disease) or the treatment of pain in a mammal which comprises a therapeutically effective amount of a compound of the present invention, or a pharmaceutically acceptable salt, prodrug or hydrate thereof, and a pharmaceutically acceptable carrier.
- the invention also relates to a pharmaceutical composition for the prevention of blastocyte implantation in a mammal, which comprises a therapeutically effective amount of a compound of the present invention, or a pharmaceutically acceptable salt, prodmg or hydrate thereof, and a pharmaceutically acceptable carrier.
- the invention also relates to a pharmaceutical composition for treating a disease related to vasculogenesis or angiogenesis in a mammal which comprises a therapeutically effective amount of a compound of the present invention, or a pharmaceutically acceptable salt, prodmg or hydrate thereof, and a pharmaceutically acceptable carrier.
- said pharmaceutical composition is for treating a
- chronic inflammatory disease such as rheumatoid arthritis, atherosclerosis, inflammatory bowel disease, skin diseases such as psoriasis, excema, and scleroderma
- diabetes diabetic retinopathy, retinopathy of prematurity, age-related macular degeneration, hemangionia, glioma,
- the invention also relates to a method of treating a hyperproliferative disorder in a mammal that comprises administering to said mammal a therapeutically effective amount of a compound of the present invention, or a pharmaceutically acceptable salt, prodmg or hydrate thereof.
- said method relates to the treatment of cancer such as brain, lung, squamous cell, bladder, gastic, pancreatic, breast, head, neck, renal, kidney, ovarian, prostate, colorectal, esophageal, testicular, gynecological or thyroid cancer.
- said method relates to the treatment of a non- cancerous hyperproliferative disorder such as benign hyperplasia of the skin (e.g., psoriasis), restenosis, or prostate (e.g., benign prostatic hypertrophy (BPH)).
- a non- cancerous hyperproliferative disorder such as benign hyperplasia of the skin (e.g., psoriasis), restenosis, or prostate (e.g., benign prostatic hypertrophy (BPH)).
- the invention also relates to a method for the treatment of a hyperproliferative disorder in a mammal that comprises administering to said mammal a therapeutically effective amount of a compound of the present invention, or a pharmaceutically acceptable salt, prodrug or hydrate thereof, in combination with an anti-tumor agent selected from the group consisting of mitotic inhibitors, alkylating agents, anti- metabolites, intercalating antibiotics, growth factor inhibitors, cell cycle inhibitors, enzyme inhibitors, topoisomerase inhibitors, biological response modifiers, anti- hormones, angiogenesis inhibitors, and anti-androgens.
- an anti-tumor agent selected from the group consisting of mitotic inhibitors, alkylating agents, anti- metabolites, intercalating antibiotics, growth factor inhibitors, cell cycle inhibitors, enzyme inhibitors, topoisomerase inhibitors, biological response modifiers, anti- hormones, angiogenesis inhibitors, and anti-androgens.
- the invention also relates to a method of treating pancreatitis or kidney disease in a mammal that comprises administering to said mammal a therapeutically effective amount of a compound of the present invention, or a pharmaceutically acceptable salt, prodrug or hydrate thereof.
- the invention also relates to a method of preventing blastocyte implantation in a mammal that comprises administering to said mammal a therapeutically effective amount of a compound of the present invention, or a phamiaceutically acceptable salt, prodmg or hydrate thereof.
- the invention also relates to a method of treating diseases related to vasculogenesis or angiogenesis in a mammal that comprises administering to said mammal a therapeutically effective amount of a compound of the present invention, or a pharmaceutically acceptable salt, prodmg or hydrate thereof.
- said method is for treating a disease selected from the group consisting of tumor angiogenesis, chronic inflammatory disease such as rheumatoid arthritis, atherosclerosis, inflammatory bowel disease, skin diseases such as psoriasis, excema, and scleroderma, diabetes, diabetic retinopathy, retinopathy of prematurity, age-related macular degeneration, hemangioma, glioma, melanoma, Kaposi's sarcoma and ovarian, breast, lung, pancreatic, prostate, colon and epidermoid cancer.
- a disease selected from the group consisting of tumor angiogenesis, chronic inflammatory disease such as rheumatoid arthritis, atherosclerosis, inflammatory bowel disease, skin diseases such as psoriasis, excema, and scleroderma, diabetes, diabetic retinopathy, retinopathy of prematurity, age-related macular degeneration, hemangioma,
- Patients that can be treated with compounds of the present invention, or pharmaceutically acceptable salts, prodrugs and hydrates of said compounds, according to the methods of this invention include, for example, patients that have been diagnosed as having psoriasis, restenosis, atherosclerosis, BPH, lung cancer, bone cancer, CMML, pancreatic cancer, skin cancer, cancer of the head and neck, cutaneous or intraocular melanoma, uterine cancer, ovarian cancer, rectal cancer, cancer of the anal region, stomach cancer, colon cancer, breast cancer, testicular, gynecologic tumors (e.g., uterine sarcomas, carcinoma of the fallopian tubes, carcinoma of the endometrium, carcinoma of the cervix, carcinoma of the vagina or carcinoma of the vulva), Hodgkin's disease, cancer of the esophagus, cancer of the small intestine, cancer of the endocrine system (e.g., cancer of the thyroid, parathyroid or adrenal glands
- This invention also relates to a pharmaceutical composition for inhibiting abnormal cell growth in a mammal which comprises an amount of a compound of the present invention, or a pharmaceutically acceptable salt or soivate or prodmg thereof, in combination with an amount of a chemotherapeutic, wherein the amounts of the compound, salt, soivate, or prodrug, and of the chemotherapeutic are together effective in inhibiting abnormal cell growth.
- chemotherapeutics are presently known in the
- the chemotherapeutic is selected from the group consisting of mitotic inhibitors, alkylating agents, anti-metabolites, intercalating antibiotics, growth factor inhibitors, cell cycle inhibitors, enzymes, topoisomerase inhibitors, biological response modifiers, anti-hormones, angiogenesis inhibitors, and anti-androgens.
- This invention further relates to a method for inhibiting abnormal cell growth in a mammal or treating a hyperproliferative disorder which method comprises administering to the mammal an amount of a compound of the present invention, or a pharmaceutically acceptable salt or soivate or prodmg thereof, in combination with radiation therapy, wherein the amounts of the compound, salt, soivate, or prodrug, is in combination with the radiation therapy effective in inhibiting abnormal cell growth or treating the hyperproliferative disorder in the mammal.
- Techniques for administering radiation therapy are known in the art, and these techniques can be used in the combination therapy described herein.
- the administration of the compound of the invention in this combination therapy can be determined as described herein.
- this invention further relates to a method for sensitizing abnormal cells in a mammal to treatment with radiation which comprises administering to the mammal an amount of a compound of the present invention or pharmaceutically acceptable salt or soivate or prodmg thereof, which amount is effective is sensitizing abnormal cells to treatment with radiation.
- the amount of the compound, salt, or soivate in this method can be determined according to the means for ascertaining effective amounts of such compounds described herein.
- the invention also relates to a method of and to a pharmaceutical composition of inhibiting abnormal cell growth in a mammal which comprises an amount of a compound of the present invention, or a pharmaceutically acceptable salt or soivate thereof, a prodmg thereof, or an isotopically-labeled derivative thereof, and an amount of one or more substances selected from anti-angiogenesis agents, signal transduction inhibitors, and antiproliferative agents.
- Anti-angiogenesis agents such as MMP-2 (matrix-metalloprotienase 2) inhibitors, MMP-9 (matrix-metalloprotienase 9) inhibitors, and COX-II (cyclooxygenase II) inhibitors, can be used in conjunction with a compound of the present invention and
- COX-II inhibitors examples include CELEBREXTM (alecoxib), valdecoxib, and rofecoxib.
- useful matrix metalloprotienase inhibitors are described in WO 96/33172 (published October 24, 1996), WO 96/27583 (published March 7, 1996), European Patent Application No. 5 97304971.1 (filed July 8, 1997), European Patent Application No.
- MMP-2 and MMP-9 inhibitors are those that have 0 little or no activity inhibiting MMP-1.
- MMP-2 and/or MMP-9 are those that selectively inhibit MMP-2 and/or MMP-9 relative to the other matrix-metalloproteinases (i.e., MMP-1, MMP-3, MMP-4, MMP-5, MMP-6, MMP-7, MMP-8, MMP-10, MMP-11, MMP-12, and MMP-13).
- MMP inhibitors useful in the present invention are 5 AG-3340, RO 32-3555, and RS 13-0830.
- the terms “abnormal cell growth” and “hyperproliferative disorder” are used interchangeably in this application.
- Abnormal cell growth refers to cell growth that is independent of normal regulatory mechanisms (e.g., loss of contact 0 inhibition).
- tumor cells tumor cells
- mutated tyrosine kinase a mutated tyrosine kinase or overexpression of a receptor tyrosine kinase
- benign and malignant cells of other proliferative diseases in
- the term "treating”, as used herein, unless otherwise indicated, means reversing, alleviating, inhibiting the progress of, or preventing the disorder or condition to which such term applies, or one or more symptoms of such disorder or condition.
- treatment refers to the act of treating as "treating” is defined immediately above.
- Representative compounds of the present invention, which are encompassed by the present invention include, but are not limited to the compounds of the examples and their pharmaceutically acceptable acid or base addition salts or prodrugs thereof.
- General synthetic methods which may be referred to for preparing some of the compounds of the present invention are provided in PCT published application number WO 00/42022 (published July 20, 2000). The foregoing patent application is incorporated herein by reference in its entirety. Illustrations of several methods for the preparation of compounds of the present invention are shown in Schemes 1-5.
- Scheme 1 illustrates the synthesis of compounds of the present invention.
- the acid is nitrated using standard conditions preferable fuming nitric acid in H 2 SO 4 .
- the aniline is prepared by fluoride displacement with NH OH at room temperature in water followed by careful acidification with concentrated mineral acid to pH near 0.
- the ester is prepared by standard methods including by not limited to Fisher Esterification (MeOH, H 2 SO 4 ), and reaction with TMSCHN 2 in suitable organic solvents like PhMe/MeOH or THF/MeOH.
- the dianilino derivative is prepared by heating (60 to 200 °C) the ester with an excess of the appropriate aniline neat or in an organic solvent like xylenes.
- step 5 the preferred method is stirring the ester with 10 equivalents aniline in xylenes at reflux until complete reaction.
- the nitro arene is reduced to produce the diamine by standard reduction conditions, including by not limited to H 2 , and Pd/C or Pd(OH) 2 /C or Raney Nickel in organic solvent like EtOH or THF, Fe in AcOH, Zn in AcOH or Zn, NH 4 C1 (aq) in MeOH.
- step 6 the diamine is cyclization by heating with formic acid neat or formamidine acetate in an appropriate solvent like EtOH.
- nitro arene can be converted directly to the benzimidazole in step 7 by heating in formic acid with Pd(OH) 2 /C or other palladium source like Pd/C.
- a halide can be incorporated by standard methods, including but not limited to
- step 9 the benzimidazole is alkylated to give a near equal mixture of NI and N3 products which are separable by standard techniques, including, for example, chromatography and trituration.
- the alkylation is accomplished by use of an alleviating agent like an alkyl halide and base like NaH, or K 2 CO 3 in suitable organic solvent like DMF or THF at temperatures ranging from 0 to 80 °C.
- R 7 can be further modified by various synthetic methods known in the art, as exemplified below.
- step 10 the ester is hydrolysized by standard saponification methods.
- the acid is then converted to the desired hydroxamate in step 11 by standard coupling procedures including but not limited to EDC1, HOBt or PyBOP and the appropriate hydroxylamine in suitable organic solvents like DMF, THF or methylene chloride.
- Scheme 2 illustrates an example in which the R 8 substituent is on the aniline prior to the coupling procedure with the nitro ester. The reaction description is exactly like that for Scheme 1 except that there is no need to incorporated R 8 as it is present in the aniline from the beginning.
- Scheme 3 the preparation of N3 alkyl amino benzimidazole derivatives is illustrated.
- step 1 the terminal alkene of the N3 alkylated benzimidazole hydroxamate is dihydroxylated using a suitable oxidant like OsO in suitable solvent or KMnO 4 or I 2 , AgOAc, AcOH, water.
- a suitable oxidant like OsO in suitable solvent or KMnO 4 or I 2 , AgOAc, AcOH, water.
- the diol is then further oxidized in step 2 by NaIO or Pb(OAc) 4 in suitable biphasic mixture to give the aldehyde.
- the alkene can be directly converted to the aldehyde by standard methods including but not limited to ozone/Me 2 S, NaIO /OsO or KMnO .
- step 4 the amine is prepared by reductive amination using standard methods such as Na(CN)BH 3 , Na(OAc) 3 BH, NMe 4 BH(OAc) 3 with or without AcOH in a suitable solvent such as methylene chloride, acetonitrile or THF.
- the preferable reduction amination is to treat the aldehyde with amine, Me NBH(OAc) 3 and acetic acid in MeCN at room temperature.
- Scheme 4 illustrates the preparation of compounds of the present invention where W is heterocyclic.
- step 1 the methyl ester is converted to the hydrazide by stirring with hydrazine in a suitable solvent like EtOH at temperatures from 50 to 100 °C.
- the desired heterocyclic derivative is then prepared by cyclization with the appropriate reagent.
- oxadiazole 21 the hydrazide is treated with an orthoformate like triethyl orthoformate, and an acid catalyst like pTsOH in a suitable organic solvent like EtOH at VDE - 80248/0027 - 213332 vl z- ° elevated temperatures (50 - 100 °C).
- hydroxy oxadiazole 22 the hydrazide can be cyclized with phosgene or a phosgene equivalent like triphosgene or carbonyl diimidazole in a suitable organic solvent like toluene at temperatures ranging from 50 to 120 °C.
- the mercapto oxadizaole 23 can be prepared by reaction with carbon disulfide, and base like KOH in suitable organic solvent like EtOH at elevated temperatures (50 - 100 °C).
- the amino oxadiazole 24 can be made by reaction with BrCN and base like NaHCO 3 , in a suitable biphasic solvent system like dioxane and water at room temperature.
- the substituted amino oxadiazole 25 can be prepared by first reacting the hydrazide with an appropriate isothiocyanate in a suitable organic solvent like DMF or THF at temperatures ranging from 25 to 100 °C.
- the intermediate can be isolated or can be cyclized directly with the treatment of EDC1 or other carbodiimide in suitable organic solvent like THF or DMF at temperatures ranging from room temperature to 80 °C.
- suitable organic solvent like THF or DMF at temperatures ranging from room temperature to 80 °C.
- step 5 the preparation of keto benzimidazole derivatives is illustrated.
- the methyl ester is converted to the benzyl alcohol by standard reductive methods, preferably LAH in THF at 0 °C or NaBH 4 in EtOH:THF at room temperature.
- Oxidation to the aldehyde can be accomplished in step 2 using MnO 2 in acetone:THF at 50 °C.
- organometallic reagents such as organolithiurn reagents and Grignard reagents
- organolithiurn reagents and Grignard reagents can be added to the aldehyde in THF at low temperature (e.g., -78 °C) to give the substituted benzyl alcohol.
- the keto derivatives can be prepared in step 4 by oxidation of the benzyl alcohol under standard conditions such as Swem or Dess-Martin oxidation.
- the compounds of the present invention may have asymmetric carbon atoms. Diastereomeric mixtures can be separated into their individual diastereomers on the basis of their physical chemical differences by methods known to those skilled in the art, for example, by cliromatography or fractional crystallization.
- Enantiomers can be separated by converting the enantiomeric mixture into a diastereomeric mixture by reaction with an appropriate optically active compound (e.g., alcohol), separating the diastereomers and converting (e.g., hydrolyzing) the individual diastereomers to the corresponding pure enantiomers. All such isomers, including diastereomeric mixtures and pure enantiomers are considered as part of the invention.
- the activity of the compounds of the present invention may be determined by the following procedure. N-terminal 6 His-tagged, constitutively active MEK1 (2-393) is
- WVDE - 80248/0027 - 213332 vl ⁇ " expressed in E. coli and protein is purified by conventional methods (Ahn et al, Science 1994, 265, 966-970).
- the activity of MEK1 is assessed by measuring the incorporation of ⁇ - 33 P-phosphate from ⁇ - 33 P-ATP onto N-terminal His tagged ERK2, which is expressed in E. coli and is purified by conventional methods, in the presence of MEK1.
- the assay is carried out in 96-well polypropylene plate.
- the incubation mixture (100 ⁇ L) comprises of 25 mM Hepes, pH 7.4, 10 mM MgCl 2 , 5 mM ⁇ -glycerolphosphate, 100 ⁇ M Na-orthovanadate, 5 mM DTT, 5 nM MEK1, and 1 ⁇ M ERK2.
- Inhibitors are suspended in DMSO, and all reactions, including controls are performed at a final concentration of 1% DMSO. Reactions are initiated by the addition of 10 ⁇ M ATP (with 0.5 ⁇ Ci ⁇ - 33 P-ATP/well) and incubated at ambient temperature for 45 minutes. Equal volume of 25% TCA is added to stop the reaction and precipitate the proteins.
- Precipitated proteins are trapped onto glass fiber B filterplates, and excess labeled ATP washed off using a Tomtec MACH III harvestor. Plates are allowed to air-dry prior to adding 30 ⁇ L/well of Packard Microscint 20, and plates are counted using a Packard TopCount. In this assay, compounds of the invention exhibited an IC 50 of less than 50 micromolar. The following compounds were evaluated in the above assay and found to be active.
- Administration of the compounds of the present invention can be effected by any method that enables delivery of the compounds to the site of action. These methods include oral routes, intraduodenal routes, parenteral injection (including intravenous, subcutaneous, intramuscular, intravascular or infusion),
- the amount of the active compound administered will be dependent on the subject being treated, the severity of the disorder or condition, the rate of administration, the disposition of the compound and the discretion of the prescribing physician.
- an effective dosage is in the range of about 0.001 to about 100 mg/kg body weight/day, preferably about 1 to about 35 mg/kg/day, in single or divided doses. For a 70 kg human, this would amount to about 0.05 to 7 g per day, preferably about 0.05 to about 2.5 g per day.
- dosage levels below the lower limit of the aforesaid range may be more than adequate, while in other cases still larger doses may be employed without causing any harmful side effect, provided that such larger doses are first divided into several small doses for administration throughout the day.
- the active compound may be applied as a sole therapy or may involve one or more other anti-tumor substances, for example those selected from, for example, mitotic inhibitors, for example vinblastine; alkylating agents, for example cis-platin, carboplatin and cyclophosphamide; anti-metabolites, for example 5-fluorouracil, cytosine arabinside and hydroxyurea, or, for example, one of the preferred anti-metabolites disclosed in European Patent Application No.
- the pharmaceutical composition may, for example, be in a form suitable for oral administration as a tablet, capsule, pill, powder, sustained release fonnulations, solution, suspension, for parenteral injection as a sterile solution, suspension or emulsion, for topical administration as an ointment or cream or for rectal administration as a suppository.
- the pharmaceutical composition may be in unit dosage forms suitable for single administration of precise dosages.
- the pharmaceutical composition will include a conventional pharmaceutical carrier or excipient and a compound according to the invention as an active ingredient. In addition, it may include other medicinal or
- exemplary parenteral administration forms include solutions or suspensions of active compounds in sterile aqueous solutions, for example, aqueous propylene glycol or dextrose solutions. Such dosage forms can be suitably buffered, if desired.
- Suitable pharmaceutical carriers include inert diluents or fillers, water and various organic solvents.
- the pharmaceutical compositions may, if desired, contain additional ingredients such as flavorings, binders, excipients and the like.
- tablets containing various excipients such as citric acid may be employed together with various disintegrants such as starch, alginic acid and certain complex silicates and with binding agents such as sucrose, gelatin and acacia.
- disintegrants such as starch, alginic acid and certain complex silicates
- binding agents such as sucrose, gelatin and acacia.
- lubricating agents such as magnesium stearate, sodium lauryl sulfate and talc are often useful for tableting purposes.
- Solid compositions of a similar type may also be employed in soft and hard filled gelatin capsules. Preferred materials, therefore, include lactose or milk sugar and high molecular weight polyethylene glycols.
- the active compound therein may be combined with various sweetening or flavoring agents, coloring matters or dyes and, if desired, emulsifying agents or suspending agents, together with diluents such as water, ethanol, propylene glycol, glycerin, or combinations thereof.
- diluents such as water, ethanol, propylene glycol, glycerin, or combinations thereof.
- Step C 4-Amino-2,3-difluoro-5-nitro-benzoic acid methyl ester 4: A 2 M solution of TMS diazomethane in hexanes (6.88 mL, 13.75 mmol) is added to a suspension of 4- amino-2,3-difluoro-5-nitro-benzoic acid 3 (2.00 g, 9.17 mmol) in 25 mL of 4:1 THF:MeOH at 0 °C under nitrogen atmosphere. Upon completion of addition, reaction mixture is warmed to room temperature.
- Step D 4-Amino-3-fluoro-5-nitro-2-o-tolylamino-benzoic acid methyl ester 5a: 4-Amino-2,3-difiuoro-5-nitro-benzoic acid methyl ester 4 (12.0 g, 51.7 mmol) is suspended in xylenes (60 mL) and ortAo-toluidine is added (55.2 mL, 517 mmol).
- the reaction mixture is heated to reflux with stirring under a nitrogen atmosphere. After 36 hours, the reaction mixture is cooled to room temperature, diluted with diethyl ether and washed with 10% aqueous HCI solution. The aqueous washings are extracted with diethyl ether. The combined organic extracts are concentrated under reduced pressure. The residue is dissolved in methylene chloride and filtered through silica gel in a fritted funnel, rinsing with methylene chloride. Three fractions are recovered. The first (2 liter) is nearly clean by HPLC. The second (1 liter) and third (1 liter) fractions are only partially pure.
- Step E 7-Fluoro-6-o-tolylamino-lH-benzoimidazole-5-carboxylic acid methyl ester 7a: 4-Amino-3-fluoro-5-nifro-2-o-tolylamino-benzoic acid methyl ester 5a (1.57 g, 4.92 mmol), formic acid (25 mL, 26.5 mmol) and 20% Pd(OH) 2 /C (1.57 g, 2.95 mmol)
- Step F 7-Fluoro-6-(4-bromo-2-methyl-phenylamino)-lH-benzoimidazole-5- carboxylic acid methyl ester 8a: 7-Fluoro-6-o-tolylamino-lH-benzoimidazole-5- carboxylic acid methyl ester 7a (2.00 g, 6.68 mmol) is suspended in 1:1 THF:MeOH mixture (60 mL) and cooled to -78 °C under a nitrogen atmosphere.
- Step G 7-Fluoro-6-(4-bromo-2-methyl ⁇ phenylamino)-lH-benzoimidazole-5- carboxylic acid 10a: 7-Fluoro-6-(4-bromo-2-methyl-phenylamino)-lH-benzoimidazole- 5-carboxylic acid methyl ester 8a (63 mg, 0.167 mmol) is suspended in MeOH (1.5 mL) and 20% NaOH (400 ⁇ l) is added. After 16 hours, the reaction mixture is cooled to 0 °C and 1 N HCI solution is added dropwise until pH is 2 to 3. The reaction mixture is diluted with ethyl acetate and water and the layers separated.
- cyclopropyl methyl hydroxylamine hydrochloride (20 mg, 0.158 mmol) (WO 0042022) is added. After the reaction is complete, the mixture is partitioned between methylene chloride and saturated NaHCO solution. The layers are separated and the organic layer is washed with saturated NaHCO 3 and brine. The organic layer is dried (Na 2 SO ) and concentrated under reduced pressure.
- Step A 4-Amino-3-fluoro-5-nitro-2 ⁇ phenylamino-benzoic acid methyl ester
- 26a 4-Amino-2,3-difluoro-5-nitro-benzoic acid methyl ester 4 (23.48 g, 101.1 mmol), the product of Example 1, Step C, is suspended in xylenes (125 mL) and aniline (92 mL, 1011 mmol) is added. The reaction mixture is stined at 125 °C for 16 hours under N 2 . The reaction mixture is cooled to room temperature and solids precipitate out of solution.
- Step B 7-Fluoro-6-phenylamino-3H-benzoimidazole-5-carboxylic acid methyl ester 27a: 4-Amino-3-fluoro-5-nitro-2-phenylamino-benzoic acid methyl ester 26a (16.70 g, 54.71 mmol), formic acid (250 mL, 6.63 mol) and 20% Pd(OH) 2 /C (9.00 g, 16.91 mmol) in ethanol (250 mL) are stined at 40 °C for two hours under N 2 and then at 95 °C for 16 hours.
- N-bromosuccinimide (3.15 g, 17.70 mmol) is added as a solid and the reaction mixture is stirred at room temperature under ⁇ 2 . After 30 minutes, the reaction mixture is quenched by the addition of aqueous saturated sodium bisulfite solution. The reaction mixture is then poured into a separatory funnel, diluted with water and ethyl acetate and the layers separated. The aqueous layer is extracted with ethyl acetate. The combined organic extracts are washed three times with water, once with brine and then are dried (Na 2 SO ) and concentrated under reduced pressure to yield 6.38 g (100%) of the pure desired product as a tan solid.
- Step B 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazole-5- carboxylic acid methyl ester 8b: 6-(4-Bromo-phenylamino)-7-fluoro-3H-
- VVVDE - 80248/0027 - 213332 vl 37 benzoimidazole-5-carboxylic acid methyl ester 28a (6.38 g, 17.51 mmol) is dissolved in N,N-dimethylformamide (275 mL).
- N-chlorosuccinimide (2.36 g, 17.70 mmol) is added as a solid and the reaction mixture is stirred at room temperature under N 2 until the reaction is complete (5-6 days). The reaction mixture is quenched by the addition of aqueous saturated sodium bisulfite solution to give a suspension.
- Step A 4-Amino-3-fluoro-2-(2-fluoro-phenylamino)-5-nitro-benzoic acid methyl ester 5b: 4-Amino-2,3-difluoro-5-nitro-benzoic acid methyl ester 4 (1.50 g, 6.46 mmol) is suspended in xylenes (7.5 mL) and 2-fluoro-phenylamine (6.24 mL, 64.6 mmol) is added.
- the reaction mixture is stirred at 140 °C under N 2 . After stirring for 6 days, the reaction is complete.
- the reaction mixture is cooled to room temperature and diluted with methylene chloride and filtered through a silica gel plug eluting with methylene chloride (IL) to give an orange filtrate.
- the filtrate is concentrated to dryness and then triturated with diethyl ether to yield a bright yellow solid. The trituration is repeated. The yellow solid is collected to yield 1.08 g (52%) of the pure desired product.
- Step B 6-(4-Bromo-2-fluoro-phenylamino)-7-fluoro-3H-benzoimidazole-5- carboxylic acid methyl ester 8d: 4-Amino-3-fluoro-2-(2-fluoro-phenylamino)-5-nitro- benzoic acid methyl ester 5b is converted by the reduction/cyclization and bromination procedures already described to yield the desired product. MS ESI (+) m/z 382, 384 (M+, Br pattern) detected.
- the combined diethyl ether layers are dried (MgSO 4 ) and concentrated under reduced pressure.
- the residue is redissolved in methylene chloride and flushed through a plug of silica gel eluting with methylene chloride.
- the filtrate is concentrated under reduced pressure to give a bright yellow solid.
- the solid is washed with diethyl ether and the filtrate is concentrated under reduced pressure and the residue is further purified by FCC
- Step B 7-Fluoro-6-(2-methyl-4-trifluoromethoxy-phenylamino)-3H- benzoimidazole-5-carboxylic acid methyl ester 8f: 4-Amino-3-fluoro-2-(2-methyl-4- trifluoromethoxy-phenylamino)-5-nitro-benzoic acid methyl ester 12a is converted by the reduction cyclization procedure already described to yield the desired product.
- Hydroxylamines useful for synthesizing compounds of the present invention may be prepared as follows (i) O-(2-Methoxy-ethyl)-hydroxylamine Step A: 2-(2-Methoxy-ethoxy)-isoindole-l,3-dione: DEAD (10 mL, 63 mmol) is added to a mixture of 2-methoxyethanol (5.0 mL, 63 mmol), PPh 3 (17 g, 63 mmol), and N-hydroxyphthalimide (10 g, 62 mmol) in THF (170 mL).
- the resulting orange solution is stined 16 hours at room temperature.
- the reaction mixture is concentrated in vacuo, and the solids are filtered washing with CHC1 3 .
- the filtrate is concentrated again, and the solids are filtered washing with CHC1 . This process is repeated until no precipitate forms.
- the final yellowish solids are recrystallized from EtOH to give the desired product (7.7 g, 55 %).
- Step B 0-(2-Methoxy-ethyl)-hydroxylamine: To a solution of 2-(2-methoxy- ethoxy)-isoindole-l,3-dione (7.7 g, 35 mmol) in CH C1 (30 mL) at room temperature is added methylliydrazine (2.0 mL, 36 mmol). The resulting solution is stirred for 16 hours at room temperature. The white solids are filtered off. The solvent is carefully distilled off under reduced pressure, then the concentrate is distilled under vacuum (20 ton, 57-58 °C) to afford the desired product (2.2 g, 68%). (ii) The following hydroxylamines are prepared as described above using the appropriate alcohols. The isoindole-l,3-dione intermediates are purified by flash chromatography.
- WVDE - 80248/0027 - 213332 vl 41 0-(2-Pi ⁇ eridin-l-yl-ethyl)-hydroxylamine is purified by Kugelrohr distillation (chamber temperature 140 °C, 1 ton). O .. ML)
- O O PYf ⁇ O" 2 0-(2-Benzenesulfonyl-ethyl)-hydroxylamine is purified by flash chromatography (1 % MeOH in CH 2 C1 2 ).
- O-(3-Methanesulfonyl-propyl)-hydroxylamine is used directly without purification.
- NH "0' 2 O-(3-Phenylsulfanyl-propyl)-hydroxylamine is prepared from PhSCH 2 CH 2 CH 2 Br and N-hydroxyphthalimide by the patent procedure WO 00/18790 and then is deprotected by the procedure described above and used directly without purification.
- O-(3-Benzenesulfonyl-propyl)-hydroxylamine is prepared from the above isoindole-l,3-dione through its oxidation with oxone followed by deprotection as described above and is purified by flash chromatography (100% VDE - 80248/0027 - 213332 vl 4 ⁇ ? * CH 2 C1 2 to 2% MeOH in CH 2 C1 2 ).
- Step A O-(2-Morpholin-4-yl-ethyl)-hydroxylamine dihydrochloride
- Step A 0-(2-Bromo-ethyl)-hydroxylamine hydrobromide: 2-(2-Bromo-ethoxy)- isoindole-l,3-dione is prepared from 1,2-dibromoethane and N-hydroxyphthalimide as 5 described in WO 00/18790, and is then subjected to the procedure in J. Org. Chem., 1963, 28, 1604 to yield the desired product.
- Step B (2-Bromo-ethoxy)-carbamic acid tert-butyl ester: To a solution of O-(2- bromo-ethyl)-hydroxylamine hydrobromide (100 mg, 0.45 mmol) and di-t-butyl dicarbonate (110 mg, 0.49 mmol) in CH 2 C1 2 (1 mL) at room temperature is added Et N 10 (0.08 mL, 0.56 mmol). The resulting suspension is stined for 16 hours room temperature.
- Step C (2-Morpholin-4-yl-ethoxy)-carbamic acid tert-butyl ester: To a solution 15 of (2-bromo-ethoxy)-carbamic acid tert-butyl ester (252 mg, 1.05 mmol) in DMF (2 mL) at room temperature is added morpholine (0.14 mL, 1.6 mmol). The reaction mixture is stined for 7 hours at 50 °C.
- Step D 0-(2-Morpholin-4-yl-ethyl)-hydroxylamine dihydrochloride: To a solution of (2-morpholin-4-yl-ethoxy)-carbamic acid tert-butyl ester (118 mg, 0.48 mmol) in MeOH (1 mL) is added 4 M dioxane solution of HCI (2.4 mL, 9.60 mmol) at room temperature. The resulting solution is stined for 16 hours at room temperature. 25 After addition of additional HCI (2.4 mL) followed by stirring for 4 hours, the reaction mixture is concentrated in vacuo to give yellow solids (82 mg, 78%).
- the following hydroxylamines are prepared as described in WO 02/06213: O-(2-vinyloxy-ethyl)-hydroxylamine; 2-aminooxy-2-methyl-propan-l-ol; 1- aminooxy-2-methyl-propan-2-ol; 3-aminooxy-pro ⁇ an-l-ol; and (2-aminooxy-ethy ⁇ )- methyl-carbamic acid tert-butyl ester.
- Step A 4-Amino-2-(2-chloro-phenylamino)-3-fluoro-5-nitro-benzoic acid methyl ester 5b: 4-Amino-2,3-difluoro-5-nitro-benzoic acid methyl ester 4 (2.00 g, 8.62 mmol) is suspended in xylenes (15 mL) and 2-chloro aniline (9.06 mL, 86.15 mmol) is added. The reaction mixture is heated to 140 °C under a nitrogen atmosphere.
- reaction mixture After 6 days, the reaction mixture is cooled to room temperature, and diluted with ethyl acetate. The reaction mixture is washed with water, 10% HCI solution and brine. The organic layer is dried (MgSO 4 ) and concentrated under reduced pressure. The crude product is triturated with diethyl ether, twice, to give 0.35 g (12%) pure desired product as a brownish solid.
- Step B 4,5-Diamino-2-(2-chloro-phenylamino)-3-fluoro-benzoic acid methyl ester 6a: 4-Amino-2-(2-chloro-phenylamino)-3-fluoro-5-nitro-benzoic acid methyl ester 5b (0.30 g, 0.88 mmol) is suspended in AcOH (5 mL) and zinc dust (0.29 g, 4.42 mmol) is added. After 15 minutes, the reaction is complete. The reaction mixture is diluted with ethyl acetate and filtered through Celite. The filtrate is washed with water, saturated NaHCO 3 , 10% K 2 CO 3 and brine.
- Step C 6-(2-Chloro-phenylamino)- 7-fluoro-3H-benzoimidazole-5-carboxylic acid methyl ester 7b: 4,5-Diamino-2-(2-chloro-phenylamino)-3-fluoro-benzoic acid
- Step D 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazole-5- carboxylic acid methyl ester 8b: 6-(2-Chloro-phenylamino)-7-fluoro-3H- benzoimidazole-5 -carboxylic acid methyl ester 7b (55 mg, 0.172 mmol) is dissolved in l.T THF:MeOH (2 mL) and cooled to -78 °C under an atmosphere of nitrogen. TsOHH 2 O (49 mg, 0.258 mmol) is added followed by NBS (31 mg, 0.174 mmol).
- reaction mixture After 10 minutes, the reaction mixture is warmed to 0 °C and then 2 hours later warmed to room temperature. After 16 hours, the reaction mixture is quenched by the addition of 10%) Na 2 S 2 O 3 and diluted with ethyl acetate and water. The layers are separated and the aqueous layer is extracted with ethyl acetate. The combined organic extracts are dried (MgSO 4 ) and concentrated under reduced pressure. The crude product is triturated with methylene chloride to give 58 mg (85%) of pure desired product as a tan solid.
- Step E 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazole-5- carboxylic acid 10: 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazole-5- carboxylic acid methyl ester 8b (58 mg, 0.146 mmol) is suspended in EtOH (2 mL) and 1 L 2 N NaOH is added. After 16 hours, the reaction mixture is diluted with ethyl acetate, water, and 10% HCI solution. The layers are separated and the organic layer is washed with brine. The organic layer is dried (MgSO ) and concentrated under reduced pressure.
- Step F 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazole-5- carboxylic acid cyclopropylmethoxy-amide
- lib 6-(4-Bromo-2-chloro-phenylamino)-7- fluoro-3J -benzoimidazole-5-carboxylic acid 10b (22 mg, 0.057 mmol) is dissolved in DMF (1 mL) and HOBt (9 mg, 0.062 mmol) followed by triethylamine (18 ⁇ L, 0.132 mmol) is added.
- 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-methyl-3H- benzoimidazole-5 -carboxylic acid 10c 6-(4-Bromo-2-chloro ⁇ phenylamino)-7-fluoro-3- methyl-3H-benzoimidazole-5-carboxylic acid methyl ester 9a (56 mg, 0.14 mmol) is dissolved into 2:1 THF/water (3 L ) and aOH (0.55 mL, 1.0 M aqueous solution, 0.55 mmol) is added. After stirring for two hours the reaction is reduced to one quarter initial volume via rotary evaporation and the remainder diluted to 50 mL with water. The aqueous solution is acidified to pH 2 by the addition of 1.0 M aqueous HCI and extracted with 1:1 tetrahydrofuran ethyl acetate (3x), dried (Na 2 SO ) and concentrated under
- Step C 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-methyl-3H- benzoimidazole-5 -carboxylic acid (2-vinyloxy-ethoxy)-amide 29a: 6-(4-Bromo-2-chloro- phenylamino)-7-fluoro-3-methyl-3H-benzoimidazole-5-carboxylic acid 10c (2.00 g, 5.0 mmol), O-(2-vinyloxy-ethyl)-hydroxylamine (0.776 g, 7.5 mmol), HOBt (0.88 g, 6.5 mmol), triethylamine (1.61 mL, 2.3 mmol) and EDCl (1.3 g, 6.5 mmol) are dissolved in dimethylformamide (52 mL) and stined at room temperature for 48 hours.
- reaction mixture is diluted with ethyl acetate, washed with water (3x), saturated potassium carbonate (2x), saturated ammonium chloride (2x), brine, dried (Na 2 SO ) and concentrated under reduced pressure to an off- white solid. Trituration of the solid with diethyl ether provides 2.18 g (90%) desired product as an off-white solid. MS ESI (+) m/z 483, 485 (M+ Br pattern) detected.
- Step D 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-methyl-3H- benzoimidazole-5 -carboxylic acid (2-hydroxy-ethoxy)-amide 29c: Hydrochloric acid (14 mL, 1.0 M aqueous solution, 14 mmol) is added to a suspension of 6-(4-bromo-2-chloro- phenylamino)-7-fluoro-3-methyl-3H-benzoimidazole -5-carboxylic acid (2-vinyloxy- ethoxy)-amide 29a (2.18 g, 4.50 mmol) in ethanol (50 mL) and the reaction mixture allowed to stir for 24 hours.
- Example 11 The following compounds are prepared by methods similar to those described in
- 6-(4-bromo-2-chloro-phenylamino)-7-fluoro-3-methyl-3H- benzoimidazole-5-carboxylic acid allyloxy-amide 29tt (20 mg, 0.04 mmol) in 0.50 mL 4:1 tefrahydrofuran/water is added OsO 4 (41 ⁇ L, 0.054 M solution in t-BuOH, 0.002 mmol) followed by NMO (7 mg, 0.06 mmol).
- Example 15 The following compounds are prepared by methods similar to those described in Example 10 by using methyl ester 8 a and the appropriate alkylating agent (Step A) and the appropriate hydroxylamine (Step C):
- Example 16 The following compounds are prepared by methods similar to those described in Example 10 by using methyl ester 8e and the appropriate alkylating agent (Step A) and the appropriate hydroxylamine (Step C):
- Example 17 The following compounds are prepared by methods similar to those described in Example 10 by using methyl ester 8c and the appropriate alkylating agent (Step A) and the appropriate hydroxylamine (Step C):
- Example 18 The following compounds are prepared by methods similar to those described in Example 10 by using methyl ester 8d and the appropriate alkylating agent (Step A) and the appropriate hydroxylamine (Step C):
- N3 product 9b WVDE - 80248/0027 - 213332 vl 57 N3 product 9b, while the lower R f product is the NI product.
- the recovery of the N3 product 9b is 0.415 g (38%): LC/MS ESI (+) m/z 448, 446 (M+l Br pattern) detected.
- the recovery of the NI product was 0.486 g (45%): LC/MS ESI (+) m/z 448, 446 (M+l Br pattern) detected.
- Step B 6-(4-Bromo-2-methyl-phenylamino)-7-fluoro-3-pent-4-enyl-3H- benzoimidazole-5 -carboxylic acid lOd: 6-(4-Bromo-2-methyl-phenylamino)-7-fluoro-3- pent-4-enyl-3H-benzoimidazole-5-carboxylic acid methyl ester 9b is dissolved in 1:1 THF:MeOH (10 mL) and 1 N NaOH solution (2.3 mL) is added. After 5 hours, the organic solvents are removed under reduced pressure and the residue diluted with water and 100 mL 1:1 THF:ethyl acetate.
- Step C 6-(4-Bromo-2-methyl-phenylamino)-7-fluoro-3-pent-4-enyl-3H- benzoimidazole-5 -carboxylic acid cyclopropylmethoxy-amide llf: 6-(4-Bromo-2- methyl-phenylamino)-7-fluoro-3-pent-4-enyl-3H-benzoimidazole-5-carboxylic acid lOd (0.390 g, 0.902 mmol) is dissolved in 1:1 THF:methylene chloride (6 mL) and Hunig's base (0.346 mL, 1.985 mmol) is added followed by PyBOP (0.563 g, 1.083 mmol).
- the reaction mixture is filtered tlirough Celite rinsing with ethyl acetate and methylene chloride.
- the VDE - 80248/0027 - 213332 vl - ) ° filtrate is diluted with ethyl acetate and washed with 0.01 N HCI, and brine.
- the organic layer is dried (Na SO 4 ) and concentrated under reduced pressure.
- the crude product is purified by FCC eluted with 9:1 ethyl acetate:MeOH to give 0.244 g (74%) pure desired product.
- Step E 6-(4-Bromo-2-methyl-phenylamino)-7-fluoro-3-(4-oxo-butyl)-3H benzoimidazole-5 -carboxylic acid cyclopropylmethoxy-amide lln: To a mixture of 6-(4- bromo-2-methyl-phenylamino)-3-(4,5-dihydroxy-pentyl)-7-fluoro-3H-benzoimidazole-5- carboxylic acid cyclopropylmethoxy-amide 11m (0.244 g, 0.456 mmol), THF (5 mL) and pH 7 phosphate buffer (3 mL) is added sodium periodate (0.195 g, 0.911 mmol).
- Step F 6-(4-Bromo-2-methyl-phenylamino) ⁇ 7-fluoro-3-[4-(4-methyl-piperazin- l-yl)-butyl]-3H ⁇ benzoimidazole-5 -carboxylic acid cyclopropylmethoxy-amide llo: 6-(4- Bromo-2-methyl-phenylamino)-7-fluoro-3-(4-oxo-butyl)-3H benzoimidazole-5- carboxylic acid cyclopropylmethoxy-amide lln (15 mg, 0.030 mmol) is dissolved in MeCN (500 ⁇ l) and methylpiperazine (10 ⁇ L, 0.089 mmol) is added followed by AcOH (5 ⁇ L, 0.089 mmol).
- Example 20 The following compounds are prepared by methods similar to those described in Example 19 by using the appropriate alkenyl substituted benzimidazole and the appropriate amine in the reductive amination (step F):
- 6-(4-bromo-2-methyl-phenylamino)-7-fluoro-3-(4- thiomorpholin-4-yl-butyl)-3H-benzoimidazole-5-carboxylic acid cyclopropylmethoxy- amide 181 (8 mg, 0.014 mmol) in 1:1:1 water/acetone/MeOH (1 mL) is added NMO (1.6 mg, 0.014 mmol) and osmium tetroxide (250 ⁇ L, 0.054 M solution in t-BuOH, 0.014 mmol).
- a solution of 6-(4-bromo-2-chloro-phenylamino)-3-(4-chloro-butyl)-7-fluoro- 3H-benzoimidazole-5-carboxylic acid cyclopropylmethoxy-amide 18ee (10 mg, 0.018 mmol), sodium iodide (14 mg, 0.092 mmol), and 1-methyl-piperazine (10 ⁇ L, 0.092 mmol) are stined at 85 °C for three hours.
- reaction mixture is diluted with ethyl acetate and washed three times with water, washed twice with saturated aqueous potassium carbonate, dried (Na 2 SO ) and concentrated under reduced pressure to a yellow oil.
- Flash column chromatography (1:1 dichloromethane/methanoi followed by methanol followed by 20:1 methanol/triethylamine) yields clean product (8 mg, 72%) as an off-white foam.
- Example 23 The following compounds are prepared by methods similar to those described in Example 22, using an appropriate amine and primary alkyl chloride.
- Step B 6-(4-Bromo-2-chloro-phenylamino)-3-(2-carboxy-ethyl)-7-fluoro-3H- benzoimidazole-5 -carboxylic acid methyl ester
- TFA salt 6-(4-Bromo-2-chloro- phenylamino)-3-(2-tert-butoxycarbonyl-ethyl)-7-fluoro-3H-benzoimidazole-5-carboxylic acid methyl ester (0.050 g, 0.095 mmol) is dissolved in methylene chloride (0.5 mL) and TFA (0.5 mL) is added.
- Step C 6-(4-Bromo-2-chloro-phenylamino)-7 ⁇ fluoro-3-(3-oxo-3-pyrrolidin-l ⁇ yl- propyl)-3H-benzoimidazole-5-carboxylic acid methyl ester: To solution of 6-(4-bromo-2- chloro-phenyla ⁇ nino)-3-(2-carboxy-ethyl)-7-fluoro-3iJ-benzoimidazole-5-carboxylic acid methyl ester (60 mg, 0.13 mmol) in DMF (1.8 mL) is added HOBt-H 2 O (24 mg, 0.16 mmol), Et 3 N (0.043 mL, 0.31 mmol), pyrrolidine (0.011 mL, 0.13 mmol), and EDCl (34 mg, 0.18 mmol) at room temperature.
- HOBt-H 2 O 24 mg, 0.16 mmol
- Et 3 N 0.043 mL, 0.31
- Step D 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-(3-oxo-3-pyrrolidin-l -yl- propyl)-3H-benzoimidazole-5-carboxylic acid: To a solution of 6-(4-bromo-2-chloro- phenylamino)-7-fluoro-3-(3-oxo-3-pynolidin-l-yl-propyl)-3H-benzoimidazole-5- carboxylic acid methyl ester (41 mg, 0.079 mmol) in THF/H 2 O (1.5 mL/0.75 mL) is added 0.20 mL (0.20 mmol) of 1 N aqueous LiOH at room temperature.
- the resulting solution is stined 16 hours.
- the reaction mixture is acidified with 1 N aqueous HCI (about pH 2 to 3) and diluted with EtOAc.
- the organic layer is dried over MgSO 4 , filtered, and concentrated in vacuo to give a cmde product (42 mg) which is directly used without further purification.
- Example 26 The following compounds are prepared by methods similar to those described in Example 25 using methyl ester 8b and the appropriate amines:
- Step B 6-(4-Bromo-2-chloro-phenylamino)- 7-fluoro-3-(tetrahydro-pyran-2- ylmethyl) -3 H-benzoimidazole-5 -carboxylic acid llr: 6-(4-Bromo-2-chloro- phenylamino)-7-fluoro-3-(tetrahydro-pyran-2-ylmethyl)-3H-benzoimidazole-5- carboxylic acid methyl ester llq is suspended in 4:1 tetrahydrofuran/water (2.5 mL) and aqueous 1 M LiOH is added (2.5 mL). After stirring at room temperature for 16 hours, the reaction mixture is homogeneous and the reaction is complete.
- reaction mixture is cooled to 0 °C, diluted with water and aqueous 2 M HCI is added dropwise until the pH of the solution is 1-2, at which time it turns to a suspension.
- the reaction mixture is poured into a separatory funnel and diluted with ethyl acetate/tefrahydrofuran and water and the layers separated.
- the aqueous layer is extracted with ethyl acetate.
- the combined organic layers are washed with brine, dried (Na 2 SO 4 ) and concentrated under
- Step C 6-(4-Bromo-2-chloro-phenylamino)- 7-fluoro-3-(tetrahydro-pyran-2- ylmethyl)-3H-benzoimidazole-5-carboxylic acid (2-vinyloxy-ethoxy) -amide 11s: 6-(4- Bromo-2-chloro-phenylamino)-7-fluoro-3-(tetrahydro-pyran-2-ylmethyl)-3H- benzoimidazole-5-carboxylic acid llr (0.11 g, 0.23 mmol) is dissolved in N,N- dimethylformamide (2 mL).
- the ethyl acetate layer is washed successively with aqueous saturated NH 4 C1 (2x), brine (lx), aqueous saturated sodium bicarbonate (2x), water (lx), and brine (lx), dried (Na 2 SO 4 ) and concentrated under reduced pressure.
- the resulting solid is purified by FCC (eluting with 15:1 methylene chloride:methanol) to yield 0.039 g (79%) of the pure desired product as an off-white solid.
- Step D 6 ⁇ (4-Bromo-2-chloro-phenylamino)-7-fluoro-3-(tetrahydro-pyran-2- ylmethyl)-3H-benzoimidazole-5-carboxylic acid (2-hydroxy-ethoxy)-amide lip: 6-(4- Bromo-2-chloro-phenylamino)-7-fluoro-3-(tetrahydro-pyran-2-ylmethyl)-3H- benzoimidazole-5-carboxylic acid (2-vinyloxy-ethoxy)-amide 11s (0.039 g, 0.068 mmol) is dissolved in ethanol (2 mL) and aqueous 2 M HCI (200 uL) is added.
- the reaction mixture is stined at room temperature for 30 minutes.
- the reaction mixture is diluted with water and then neutralized with aqueous 2 M NaOH (about 200 ⁇ L) until pH 7 and concentrated under reduced pressure.
- the residue is partitioned between ethyl acetate and brine in a separatory funnel and the layers separated.
- the ethyl acetate layer is dried (Na 2 SO 4 ) and concentrated under reduced pressure to yield 0.034 g (91%>) of the pure desired product as an off-white solid.
- Example 28 The following compounds are prepared by methods similar to that described in Example 27 by using the appropriate methyl ester and alkylating agent (Step A) and the appropriate hydroxylamine in (Step C).
- Step B 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-(2-methanesulfonyl- ethyl)-3H-benzoimidazole-5-carboxylic acid cyclopropylmethoxy-amide
- llbb 6-(4- Bromo-2-chloro-phenylamino)-7-fluoro-3-(2-methanesulfonyl-ethyl)-3H- benzoimidazole-5-carboxylic acid methyl ester lice is subjected to methods previously described to give 6-(4-bromo-2-chloro-phenylamino)-7-fluoro-3-(2-methanesulfonyl- ethyl)-3H-benzoimidazole-5-carboxylic acid cyclopropylmethoxy-amide: MS APCI (+) m/z 561, 559 (M+ Br pattern) and MS APCI (-)
- Step A 6-(4-Bromo-2-methyl-phenylamino)-7-fluoro-3H-benzoimidazole-5- carboxylic acid hydrazide 20a: 6-(4-Bromo-2-methyl-phenylamino)-7-fluoro-3H- benzoimidazole-5-carboxylic acid methyl ester 8a (0.051 g, 0.135 mmol) is suspended in 10 EtOH (5 mL) and hydrazine hydrate (0.118 g, 2.023 mmol) is added.
- reaction mixture is heated at reflux for 16 hours.
- the reaction mixture is concentrated under reduced pressure and purified by FCC eluted with 97:3 ethyl acetate:MeOH to give 0.041 g (81%) of clean desired product: LC/MS ESI (+) m/z 378, 380 (M+ Br pattern) detected.
- Step B [6-(5 -Amino- [1 ,3,4] Oxadiazol-2-yl)-4-fluoro-lH-benzoimidazol-5-yl] '-(4- bromo-2-methyl-phenyl) -amine 24a: 6-(4-Bromo-2-methyl-phenylamino)-7-fluoro-3H- benzoimidazole-5-carboxylic acid hydrazide 20a (0.041 g, 0.109 mmol) is suspended in 1,4-dioxane (1.5 mL) and 36 ⁇ L of a 3 M solution of cyanogen bromide in methylene chloride is added. NaHCO 3 (9 mg, 0.109 mmol) in water (1.5 mL) is then added. After
- CS is added (26 mg, 0.346 mmol) followed by powdered KOH (8 mg, 0.150 mmol). After stirring at 0 °C for 30 minutes, the reaction mixture is heated to reflux. After 3.5 hours, the reaction mixture is quenched by the addition of water, followed by the addition of ethyl acetate and IN HCI. The layers are separated and the aqueous layer is extracted with ethyl acetate.
- HOBT (0.016 g, 0.10 mmol)
- triethylamine (0.028 mL, 0.20 mmol)
- methylamine (0.059 mL, 0.12 mmol, 2 M solution in tefrahydrofuran)
- EDCl (0.019 g, 0.10 mmol) are added consecutively to the reaction mixture at room temperature.
- the solution is stined at room temperature for 16 hours under N 2 .
- the reaction mixture is poured into a separatory funnel and diluted with ethyl acetate and water and the layers separated.
- the ethyl acetate layer is washed successively with aqueous saturated NH 4 C1 (2x), brine (lx), aqueous saturated sodium bicarbonate (2x), water (lx), and brine (lx), dried (MgSO 4 ) and concentrated under reduced pressure.
- the resulting solid is purified by FCC (eluting with 19:1 methylene chloride:methanol) to yield 0.013 g (42%) of the pure desired product.
- Example 39 The following compounds are prepared using methods similar to that described above in Example 38 by using the appropriate carboxylic acid and amine. In those cases that contain two amine functionalities, the appropriate mono Boc protected amine is used in the coupling reaction and the Boc group is later removed in a final step under standard TFA deprotection conditions.
- Lithium aluminum hydride (8.03 mL, 8.03 mmol, IM solution in tetrahydrofuran) is added dropwise to the reaction mixture. After stirring for 10 minutes at -78 °C, the reaction mixture is warmed to 0 °C and becomes a homogeneous solution. The reaction mixture is stined for 5 minutes at 0 °C and then cooled again to -78 °C. The reaction mixture is quenched with MeOH, diluted with Rochelle's salt, warmed to room temperature and stined for 1 hour. The reaction mixture is then poured into a separatory funnel, diluted with ethyl acetate, and the layers separated. The aqueous phase is extracted with ethyl acetate.
- Step A l-[6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-methyl-3H-benzoimidazol-5-yl]-2- hydroxy-ethanone (lOg)
- Step A l-[6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-methyl-3H benzoimidazol-5-yl]-2-methoxymethoxy-ethanol lOi: To a solution of tributyl- methoxymethoxymethyl-stannane (864 mg, 2.37 mmol, prepared by the procedure reported in J Org.
- Step B l-[6-(4-Bromo-2-chloro-phenylamino)- 7-fluoro-3-methyl-3H- benzoimidazol-5-yl]-2-methoxymethoxy-ethanone lOj: A solution of l-[6-(4-bromo-2- chloro-phenylamino)-7-fluoro-3-methyl-3H-benzoimidazol-5-yl]-2-methoxymethoxy- ethanol lOi (44 mg, 0.096 mmol) and the Dess-Martin periodinane (49 mg, 0.12 mmol) in CH 2 C1 (1.5 mL) is stined for 1.5 hours at room temperature. The reaction mixture is diluted with ether (3 mL). Saturated aqueous NaHCO 3 (1 mL) containing sodium thiosulfate pentahydrate (74 mg) is added. The resulting mixture is stined for 10
- Step C l-[6-(4-Bromo-2-chloro-phenyla nino)-7-fluoro-3-methyl-3H- benzoimidazol-5-yl]-2-hydroxy-ethanone 10: A mixture of l-[6-(4-bromo-2-chloro- phenylamino)-7-fluoro-3-methyl-3H-benzoimidazol-5-yl]-2-methoxymethoxy-ethanone lOj (15 mg, 0.033 mmol), 10% aqueous HCI (0.3 mL), methanol (0.01 mL), and water (0.05 mL) is stirred for 3 days at room temperature.
- Step B l-[6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazol-5-yl]- 2-methoxymethoxy-ethanone 10m: To a solution of oxalyl chloride (0.11 mL, 0.22
- the reaction mixture is slowly warmed to room temperature, stined for 5 minutes at room temperature, and diluted with water and CH 2 C1 2 .
- the organic layer is separated, dried over MgSO , filtered, and concentrated to give the cmde product which is directly used without further purification.
- Step C l-[6-(4-Bromo-2-chloro-phenylamino)- 7-fluoro-3H-benzoin ⁇ idazol-5-yl] ⁇ 10 2-hydroxy-ethanone 10k: l-[6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H- benzoimidazol-5-yl]-2-methoxymethoxy-ethanone 10m is deprotected according to the procedure described in Example 42, Step C to yield compound 10k.
- Step B l-[6-(4-Bromo-2-chloro-phenylamino)- 7-fluoro-3H-benzoimidazol-5-ylJ- 2-ethoxy-ethanone lOn: The title compound is prepared from l-[6-(4-bromo-2-chloro- phenylamino)-7-fluoro-3H " -benzoimidazol-5-yl]-2-ethoxy-ethanol lOo according to the procedure described in Example 42, Step B except that the reaction mixture is not treated with saturated aqueous NaHCO 3 containing sodium thiosulfate pentahydrate.
- Step B 2-Benzyloxy-l-[6-(4-bromo-2-chloro-phenylamino)- 7-fluoro-3H- benzoimidazol-5-yl] -ethanone lOq: The title compound is prepared from 2-benzyloxy-l- [6-(4-bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazol-5-yl]-ethanol lOr by the procedure described in Example 42, Step B except that the reaction mixture is not treated with saturated aqueous NaHCO 3 containing sodium thiosulfate pentahydrate: MS APCI (+) m/z 488, 490 (M+, Br pattern) detected; 1H NMR (400 MHz, CD 3 OD) ⁇ 8.37 (s, IH), 8.02 (s, IH), 7.51 (d, IH), 7.26 (m, 5H), 7.19 (dd, IH), 6.46 (dd, IH), 4.
- Step A l-[6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazol-5-yl]-2- methanesulfonyl-ethanone (10s)
- Step A l-[6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazol-5-yl]-
- 2-methanesulfonyl-ethanol lOt To a solution of methyl sulfone (65 mg, 0.68 mmol) in THF (1.5 mL) is added a solution of n-BuLi (0.27 mL, 0.68 mmol, 2.5 M solution in hexane) at -78 °C. After stirring for 5 minutes, HMPA (0.1 mL) is added. After stirring
- Step B l-[6-(4-Bromo-2-chloro-phenylamino)- 7-fluoro-3H-benzoimidazol-5-yl]- 10 2-methanesulfonyl-ethanone 10s:
- the title compound is prepared from l-[6-(4-bromo-2- chloro-phenylamino)-7-fluoro-3H-benzoimidazol-5-yl]-2-methanesulfonyl-ethanol lOt by the procedure described in Example 42, Step B except that the reaction mixture is not treated with saturated aqueous NaHCO 3 containing sodium thiosulfate pentahydrate: MS APCI (+) m/z 460, 462 (M+, Br pattern) detected; 1H NMR (400 MHz, acetone- 6 ) ⁇ 15 8.44 (s, IH), 8.33 (s, IH), 7.59 (s, IH), 7.32 (d, IH), 6.68 (d
- Step A l-[6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazol-5-yl]-ethane-l,2- diol (lOu)
- Step A l-[6-(4-Bromo-2-chloro-phenylamino)-7fluoro-3H-benzoimidazol-5-yl]- 2-(isopropoxy-dimethyl-silanyl)-ethanol lOv: To a solution of the Grignard reagent prepared from Mg and chloromethyl dimethylisopropoxy silane (Org. Synth.
- Step B l-[6-(4-Bromo-2-chloro-phenylamino)- 7-fluoro-3H-benzoimidazol-5-ylJ- ethane-1 ,2-diol lOu: To the cmde l-[6-(4-bromo-2-chloro-phenylamino)-7-fluoro-3H- benzoimidazol-5-yl]-2-(isopropoxy-dimethyl-silanyl)-ethanol lOv in MeOH-THF (5 mL- 5 mL) is added KHCO 3 (54 mg, 0.54 mmol), and KF (74 mg, 1.27 mmol), and 30% aqueous H 2 O 2 (0.20 mL) at room temperature.
- KHCO 3 54 mg, 0.54 mmol
- KF 74 mg, 1.27 mmol
- reaction mixture is quenched by the addition of AcOH until the reaction mixture reaches pH 7.
- the reaction mixture is concentrated to dryness under reduced pressure and the residue partitioned between ethyl acetate and water. The layers are separated and the organic layer is washed with water (3x), brine, and dried (Na 2 SO ). The organic layer is concentrated under reduced pressure until a wliite precipitate forms which is collected by filtration to give 0.225 g (79%) clean desired product: LC/MS ESI (+) m/z 478, 476 (M+ Br pattern) detected.
- Step B 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-(2-methanesulfonyl- ethyl)-3H-benzoimidazole-5-carbaldehyde 10z: [6-(4-Bromo-2-chloro-phenylamino)-7- fluoro-3-(2-methanesulfonyl-ethyl)-3H-benzoimidazol-5-yl]-methanol lOy (0.050, 0.105 mmol) is dissolved in 1 :1 THF:acetone (2 mL) under N 2 and MnO 2 (0.046 g, 0.524 mmol) is added.
- the reaction mixture is stined at room temperature for 16 hours, and then at 55 °C for 5 hours. Additional MnO 2 (0.046 g, 0.524 mmol) is added and the reaction mixture stined at 55 °C for 2 hours.
- the reaction mixture is concentrated to dryness and the residue dissolved in 10:1 methylene chloride MeOH.
- the solution is filtered through a silica gel plug eluted with 10:1 methylene chloride:MeOH.
- the resulting filtrate is concentrated under reduced pressure to give 41 mg (82%) desired
- Step C (4-Bromo-2-chloro-phenyl)-(4-fluoro-6-oxazol-5-yl-lH-benzoimidazol- 5-yl)-amine lOx: 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-(2-methanesulfonyl- ethyl)-3H-benzoimidazole-5-carbaldehyde lOz (0.025 g, 0.053 mmol) is suspended in MeOH (2 mL) and K 2 CO 3 (0.015 g, 0.105 mmol) is added followed by tosylmethyl isocyanide (0.011 g, 0.058 mmol).
- reaction mixture is heated to reflux under N 2 for 16 hours. After cooling, additional tosylmethyl isocyanide (0.011 g, 0.058 mmol) is added and the reaction mixture heated to reflux under N for 16 hours.
- the reaction mixture is cooled to room temperature, concentrated under reduced pressure and dissolved in ethyl acetate.
- the organic solution is washed with water and brine.
- the combined aqueous washes are extracted with ethyl acetate.
- the combined organic extracts are dried (Na 2 SO 4 ) and concentrated under reduced pressure.
- Step A (4-Bromo-2-chloro-phenyl)- ⁇ 4-fluoro-l-(2-methanesulfonyl-ethyl)-6-[4- (toluene-4-sulfonyl)-4,5-dihydro-oxazol-5-yl]-lH-benzoimidazol-5-yl ⁇ -amine lObb: 6-(4- Bromo-2-chloiO-phenylamino)-7-fluoro-3-(2-methanesulfonyl-ethyl)-3H- benzoimidazole-5-carbaldehyde lOz (0.050 g, 0.107 mmol) is suspended in EtOH (0.5 mL) under N 2 and tosylmethyl isocyanide (0.020 g, 0.105 mmol) is added followed by catalytic NaCN (about
- Step B (4-Bromo-2-chloro-phenyl)-[4-fluoro-6-(3H-imidazol-4-yl)-lH- benzoimidazol-5-yl] -amine lOaa: (4-Bromo-2-chloro-phenyl)- ⁇ 4-fluoro-l -(2- methanesulfonyl-ethyl)-6-[4-(toluene-4-sulfonyl)-4,5-dihydro-oxazol-5-yl]-lH- benzoimidazol-5-yl ⁇ -amine lObb (0.072 g, 0.107 mmol) is treated with 2.4 mL of a 2.0 M NH 3 in MeOH solution in a sealed pressure tube.
- reaction mixture is then heated to 90 °C with stirring for 20 hours and furthered stined at room temperature for 3 days.
- the reaction mixture is transfe ⁇ ed to a round bottom flask and concentrated under reduced pressure. Purification by flash column chromatography, twice, eluted with 10:1 methylene chloride:MeOH, followed by successive triturations with methylene chloride and then diethyl ether gives 3 mg (7%) desired product: LC/MS ESI (+) m/z 408, 406 (M+ Br pattern) detected; 1H NMR (400MHz, MeOH-d 4 ) ⁇ 8.23 (s, IH), 7.87 (s, IH), 7.74 (s, IH), 7.46 (m, IH), 7.32 (d, IH), 7.05 (m, IH), 6.20 (dd, IH).
- Step B 4-Amino-3-chloro-2-fluoro-5-nitro-benzoic acid 3a: Ammonium hydroxide solution (6.88 g, ⁇ 30%> in water, 58.9 mmol) is added to a solution of 3- chloro-2,4-difluoro-5-nitro-benzoic acid 2a (3.5 g, 14.7 mmol) in water (16 mL) at 0 °C with stirring. Upon completion of the ammonium hydroxide addition the reaction mixture is warmed to room temperature. After 5 hours the reaction mixture is cooled to 0 °C and concentrated HCI is carefully added until the pH of the reaction mixture is near zero. The solid is collected by filtration and washed with water and diethyl ether.
- Step C 4-Amino-3-chloro-2-fluoro-5-nitro-benzoic acid methyl ester 4a: To a stirred solution of 4-amino-3-chloro-2-fluoro-5-nitro-benzoic acid 3a (3.61 g, 15.4 mmol) in THF (30 mL) and MeOH (10 mL), TMS diazomethane (9.23 mL, 2.0 M solution in hexanes, 18.5 mmol) is added. After completion of reaction, the reaction mixture is concentrated via rotary evaporation with acetic acid in the trap. The recovered oily solid is triturated with diethyl ether to provide 1.51 g of a yellow solid.
- Step D 4-Amino-3-chloro-5-nitro-2-phenylamino-benzoic acid methyl ester 5c: 4-Amino-3-chloro-2-fluoro-5-nitro-benzoic acid methyl ester 4a (2.20 g, 8.84 mmol) is suspended in MeOH (9.4 mL) and aniline (3.22 mL, 35.4 mmol) is added. The reaction mixture is heated to reflux with stirring under a nitrogen atmosphere. After 19 hours, the reaction is complete. Distilled water (3.22 mL) is added to the reaction mixture and refluxing is continued for one hour. The reaction mixture is cooled to 0 °C in an ice bath
- Amino-3-chloro-5-nitro-2-phenylamino-benzoic acid methyl ester 5c (0.50 g, 1.55 mmol) is dissolved into 2:1 EtOH/MeOH (15.5 mL). Saturated aqueous NH 4 C1 (15 mL), Zn powder (1.02 g, 15.6 mmol), and THF (10 mL) are added. After stirring for 20 hours, the reaction mixture is diluted with CH C1 2 /THF and water. The organic layer is washed with water (3x). The combined organic extracts are dried (Na 2 SO 4 ) and concentrated under reduced pressure. The solids are triturated with ether to give 0.32 g (70%) clean desired product.
- Step F 7 -Chloro-6-phenylamino-3H-benzoimidazole-5 -carboxylic acid methyl ester 7c: 4,5-Diamino-3-chloro-2-phenylamino-benzoic acid methyl ester 6b (0.32 g, 1.09 mmol) and formamidine acetate (72 mg, 1.64 mmol) in EtOH (36 mL) are heated, with stirring, to 80 °C. After 44 hours, the reaction mixture is cooled to room temperature and diluted with EtOAc and washed with water (3x), saturated NaHCO 3 , and brine.
- Step G 6-(4-Bromo-phenylamino)- 7 -chloro-3H-benzoimidazole-5 -carboxylic acid methyl ester 8g: 7-Chloro-6-phenylamino-3H-benzoimidazole-5-carboxylic acid methyl ester 7c (0.327 g, 1.08 mmol) is dissolved into DMF (16 mL) and NBS (0.193 g, 1.08 mmol) is added.
- reaction mixture is quenched by the addition of saturated aqueous NaHSO 3 .
- the reaction mixture is then partitioned between EtOAc/THF and water.
- the organic layer is washed with water and brine.
- the combined organic extracts are dried (Na 2 SO 4 ) and concentrated under reduced pressure.
- the recovered solid is triturated with ether to give 0.225 g (54%>) pure desired product.
- Step H 6-(4-Bromo-2-chloro-phenylamino)-7-chloro-3H-benzoimidazole-5- carboxylic acid methyl ester lOdd: 6-(4-Bromo-phenylamino)-7-chloro-3H- benzoimidazole-5-carboxylic acid methyl ester 8g (0.225 g, 0.591 mmol) is dissolved in
- Step I 6-(4-Bromo-2-chloro-phenylamino)-7-chloro-3-methyl-3H- benzoimidazole-5-carboxylic acid methyl ester lOee: 6-(4-Bromo-2-chloro- phenylamino)-7-chloro-3H-benzoimidazole-5-carboxylic acid methyl ester lOdd (0.141 g, 0.34 mmol), potassium carbonate (0.141 g, 1.02 mmol), and iodomethane (0.063 mL, 1.02 mmol) are dissolved in dimethylformamide (3 mL).
- Step J 6-(4-Bromo-2-chloro-phenylamino) ⁇ 7-chloro-3-methyl-3H- benzoimidazole-5-carboxylic acid lOff: 6-(4-Bromo-2-chloro-phenylamino)-7-chloro-3- methyl-3H-benzoimidazole-5-carboxylic acid methyl ester lOee (21 mg, 0.048 mmol) is dissolved into 2:1 THF/water (1.2 mL) and NaOH (0.190 mL, 1.0 M aqueous solution, 0.190 mmol) is added. , After stirring for 4 hours the reaction is diluted with water and acidified to pH 2 by addition of 1.0 M HCI.
- Step K 6-(4-Bromo-2-chloro-phenylamino)- 7-chloro-3-methyl-3H- benzoimidazole-5 -carboxylic acid (2-vinyloxy-ethoxy) -amide lOgg: 6-(4-Bromo-2- chloiO-phenylamino)-7-chloro-3-methyl-3H-benzoimidazole-5-carboxylic acid lOff (32 mg, 0.077 mmol), O-(2-vinyloxy-ethyl)-hydroxylamine (0.010 mL, 0.092 mmol), HOBt (13 mg, 0.093 mmol), triethylamine (0.011 mL, 0.077 mmol), and EDCl (19 mg, 0.10 mmol) are dissolved into dimethylfonnamide (1.0 mL) and allowed to stir under a nitrogen atmosphere at room temperature for 24 hours. The reaction mixture is diluted with EtOAc, washed with water (3
- Step L 6-(4-Bromo-2-chloro-phenylamino)-7-chloro-3-methyl-3H- benzoimidazole-5-carboxylic acid (2-hydroxy-ethoxy)-amide lOcc: Hydrochloric acid (0.78 mL, 1.0 M aqueous solution, 0.78 mmol) is added to a suspension of 6-(4-bromo-2- chloro-phenylamino)-7-chloro-3-methyl-3H-benzoimidazole-5-carboxylic acid lOgg (2- vinyloxy-ethoxy)-amide (39 mg, 0.078 mmol) in MeOH (1 L).
- Amino-3-fluoro-5-nifro-2-phenylamino-benzoic acid methyl ester 26a (11.44 g, 37.48 mmol) is suspended in ethanol (400 mL) and ammonium formate (11.80 g, 187.0 mmol) and 20 % Pd(OH) 2 /C (10.00 g, 18.79 mmol) are added.
- the reaction mixture is stined at 95 °C under N for 30 minutes.
- the reaction mixture is cooled to room temperature and then filtered tlirough celite, rinsing with ethanol.
- the filtrate is concentrated under reduced pressure to give 9.63g (93 %) of the pure desired product as a purple/red solid.
- Step B 7-Fluoro-2-methyl-6-phenylamino-3H-benzoimidazole-5-carboxylic acid methyl ester 31a: 4,5-Diamino-3-fluoro-2-phenylamino-benzoic acid methyl ester 6c (0.20 g, 0.73 mmol) is suspended in ethanol (3 mL) and 5 M aqueous HCI (1 mL, 5.00 mmol) is added. The reaction mixture is brought to reflux under N 2 and then 2,4- pentanedione (0.150 mL, 1.45 mmol) is added. The reaction mixture is stined at reflux for 60 minutes.
- the reaction mixture is cooled to room temperature and treated with saturated aqueous NaHCO 3 until the pH of the reaction mixture is pH 7 and is then concentrated under reduced pressure to dryness.
- the residue is diluted with ethyl acetate and water, poured into a separatory funnel and the layers separated.
- the ethyl acetate layer is washed with brine, dried (Na 2 SO 4 ) and concentrated under reduced pressure.
- the red solid residue is triturated with diethyl ether to yield a light brown solid and a red filtrate.
- the solid is collected and washed with diethyl ether to yield 0.20 g (91 %) of the pure desired product as a light brown solid.
- Step C 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-2-methyl-3H- benzoimidazole-5 -carboxylic acid (2-hydroxy-eihoxy)-amide lOii: 7-Fluoro-2-methyl-6-
- WVDE - 80248/0027 - 213332 vl 96 phenylamino-3H-benzoimidazole-5-carboxylic acid methyl ester 31a is converted by the bromination, chlorination, hydrolysis, coupling, and hydrolysis procedures already described to yield the pure desired product as an off-white solid.
- Step B 7-Fluoro-6-(4-iodo-2-methyl-phenylamino)-(2-trimethylsilanyl- ethoxymethyl)-benzoimidazole-5-carboxylic acid methyl ester lOkk: 7-Fluoro-6-(4-iodo- 2-methyl-phenylamino)-lH-benzoimidazole-5-carboxylic acid methyl ester lOjj (0.200 g, 0.470 mmol) is suspended in DMF (2 mL) under N and cooled to 0 °C in an ice-water
- Step C 6-(4-Cyano-2-methyl-phenylamino)-7-fluoro-(2-trimethylsilanyl- ethoxymethyl)-benzoimidazole-5 -carboxylic acid methyl ester 1011: To a stined solution of a 1:1 mixture of NI :N3 isomers of 7-fluoro-6-(4-iodo-2-methyl-phenylamino)-(2- trimethylsilanyl-ethoxymethyl)-benzoimidazole-5-carboxylic acid methyl ester lOjj (0.060 g, 0.108 mmol) in 1 mL DMF at room temperature under N is added dppf (2 mg, 0.004 mmol) followed by P
- reaction mixture is heated to 120 °C for 45 minutes.
- the reaction mixture is cooled to room temperature and quenched by the addition of 5 mL of a 4: 1 :5 mixture of saturated NH Cl:concentrated NH OH:water.
- the aqueous layer is extracted with ethyl acetate.
- the combined organic extracts are washed with water (3x), brine, and dried (MgSO 4 ) and concentrated under reduced pressure. Purification by flash column chromatography eluted with 1:1 hexanes: ethyl acetate gives 38 mg (77%) of desired product as a 1:1 mixture of NI and N3 isomers: APCI MS (+) m/z 455 (M+l) detected.
- Step D 6-(4-Cyano-2-methyl-phenylamino)-7-fluoro-(2-trimethylsilanyl- ethoxymethyl)-benzoimidazole-5-carboxylic acid 10mm: A l.T mixture of N1:N3 isomers of 6-(4-cyano-2-methyl-phenylamino)-7-fluoro-(2-trimethylsilanyl- ethoxymethyl)-benzoimidazole-5-carboxylic acid methyl ester 1011 (31 mg, 0.068 mmol) is hydrolyzed with aqueous sodium hydroxide as described previously to give 26 mg (87%) of desired product.
- Step E 6-(4-Cyano-2-methyl-phenylamino)-7-fluoro-(2-trimethylsilanyl- ethoxymethyl)-benzoimidazole-5-carboxylic acid cyclopropylmethyoxy-amide llzz: A l.T mixture of N1:N3 isomers of 6-(4-cyano-2-methyl-phenylamino)-7-fluoro-(2-
- Step F 6-(4-Cyano-2-methyl-phenylamino)-7-fluoro-3H-benzoimidazole-5- carboxylic acid cyclopropylmethyoxy-amide llyy: To a slurry of a 1:1 mixture of N1:N3 isomers 6-(4-cyano-2-methyl-phenylamino)-7-fluoro-(2-trimethylsilanyl-ethoxymethyl)- benzoimidazole-5-carboxylic acid cyclopropylmethyoxyamide llzz (28 mg, 0.055 mmol) in 0.5 mL EtOH is added 0.5 mL 10% HCI.
- reaction mixture is heated to 50 °C with stirring overnight (Whitten et al, J. Org. Chem., 1986, 51, 1891-1894). An additional 0.5 mL 10%> HCI is added and the reaction mixture stined at 70 °C overnight. The reaction mixture is cooled to room temperature and neutralized to about pH 8 with 1.5 mL IN NaOH.
- Step B 6-(4-Ethynyl-2-methyl-phenylamino)-7-fluoro-3H-benzoimidazole-5- carboxylic acid cyclopropylmethoxyamide llaaa: 7-Fluoro-6-(2-methyl-4- trimethylsilanylethynyl-phenylamino)-3H-benzoimidazole-5-carboxylic acid cyclopropylmethoxyamide llbbb (0.020 g, 0.044 mmol) is dissolved in tetrahydrofuran (0.50 mL) and the reaction solution is cooled to 0 °C.
- TBAF (50 ⁇ L, 0.050 mmol, 1 M solution in tetrahydrofuran) is added.
- the reaction mixture is warmed to room temperature and additional TBAF (25 ⁇ L, 0.025 mmol, 1 M solution in tetrahydrofuran) is added.
- the reaction mixture is stined at 50 °C for 2 hours under N 2 .
- the reaction mixture is cooled to room temperature, a few drops of H 2 O are added and then it is concentrated under reduced pressure.
- the residue is purified by FCC (eluting with 20:1 methylene chloride :methanol) to yield 0.011 g (65%) of the pure desired product.
- the reaction mixture was stined for about 3 hours after which time the reaction was cooled to -78 °C and 2.50 mL of 70%> tert-butyl hydrogen peroxide was added. The cooling bath was then taken away and the reaction was slowly warmed up to room temperature and reacted over night.
- the reaction was then partitioned between a solution of ethyl ether/ethyl acetate (5:1) and saturated aqueous NaHCO 3 .
- the organic layer was saved and successively washed with 10% aqueous sodium sulfite, 3 times with water and finally with brine.
- the resulting organic layer was dried over MgSO 4 , filtered and concentrated under vacuum.
- the residue was dissolved in 45 mL of a solution of TFA/DCM (2:1) under an atmosphere of dry N 2 .
- the reaction was stined at room temperature for about 2 hours after which time it was concentrated under vacuum and the resulting residue was stirred in methanol for about 1 hour.
- the white slurry was stined for 1 hour, filtered through a medium fritted funnel.
- the cake was washed with about 100 L of water and pulled air through the cake for 10-15 minutes.
- Tert-butyl methyl ether 70 mL was added to the cake and stined with a spatula.
- the vacuum filtration was continued.
- the solids were dried under vacuum at 50 °C to give 2 g of the product containing about 80% of the undesired isomer.
- the t-butyl methyl ether layer was concentrated to a foam (2.18 g) enriched in the desired product comprising a mixture of isomers.
- Step B Preparation of 2-amino-3-methylbutyric acid 2- ⁇ [6-(4-bromo-2- chlorophenylamino)-7-fluoro-3-methyl-3H-benzoimidazole-5-carbonyl]-aminooxy ⁇ - ethylester trifluoroacetic acid salt: A mixture of 2-tert-butoxycarbonylamino-3- methylbutyric acid 2- ⁇ [6-(4-bromo-2-chlorophenylamino)-7-fluoro-3-methyl-3H- benzoimidazole-5-carbonyl]-aminooxy ⁇ -ethylester and its N-acylated isomer (0.6 g) were treated with 1.5 mL of trifluoroacetic acid for 0.5 hours.
- Step C Preparation of 2-amino-3-methylbutyric acid 2- ⁇ [6-(4-bromo-2- chlorophenylamino)-7-fluoro-3-methyl-3H-benzoimidazole-5-carbonyl]-aminooxy ⁇ - ethylester: 2-amino-3-methylbutyric acid 2- ⁇ [6-(4-bromo-2-chlorophenylamino)-7- fluoro-3-methyl-3H-benzoimidazole-5-carbonyl]-aminooxy ⁇ -ethylester trifluoroacetic acid salt (474 mg) was suspended in 80 mL of EtOAc.
- Step D Preparation of 2-Amino-3-methylb tyric acid 2- ⁇ [6-(4-bromo-2- chlorophenylamino)-7-fluoro-3-methyl-3H-benzoimidazole-5-carbonyl]-aminooxy ⁇ - ethylester hydrochloric acid salt: 2-Amino-3-methylbutyric acid 2- ⁇ [6-(4-bromo-2- chlorophenylamino)-7-fluoro-3-methyl-3H-benzoimidazole-5-carbonyl]-aminooxy ⁇ - ethylester (325 mg) was dissolved in about 1.5 mL of absolute EtOH, and 0.35 mL of 2M HCI in ether was added to give a thick precipitate.
- the reaction mixture was stirred for about 4 hours after which time the reaction was cooled to 0 °C and 300 ⁇ L of 10% tert-butyl hydrogen peroxide were added. The cooling bath was then taken away and the reaction was slowly warmed up to room temperature and reacted for 2.5 hours. The reaction was then quenched with 10 mL of saturated aqueous sodium thiosulfate. The resulting solution was partitioned between a solution of ethyl ether/ethyl acetate (10:1) and saturated aqueous NaHCO 3 . The organic layer was saved and successively washed with water (3X) and then with brine. The resulting organic layer was dried over MgSO 4 , filtered and concentrated under vacuum.
- the reaction was stined at room temperature for about 2 hours after which time it was concentrated under vacuum.
- the resulting residue was taken up in methanol and re- concentrated (2X).
- the resulting residue was stined in methanol for about 1 hour.
- the white solid was collected via suction filtration, washed with methanol followed by ethyl ether and then air-dried to give 188.6 mg of the desired product.
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Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
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MXPA06002268A MXPA06002268A (en) | 2003-08-29 | 2004-08-20 | N3 alkylated benzimidazole derivatives as mek inhibitors. |
AU2004270166A AU2004270166A1 (en) | 2003-08-29 | 2004-08-20 | N3 alkylated benzimidazole derivatives as MEK inhibitors |
CA002537098A CA2537098A1 (en) | 2003-08-29 | 2004-08-20 | N3 alkylated benzimidazole derivatives as mek inhibitors |
BRPI0413152-5A BRPI0413152A (en) | 2003-08-29 | 2004-08-20 | n3-alkylated benzimidazole derivatives as mek inhibitors |
EP04781809.1A EP1663210B1 (en) | 2003-08-29 | 2004-08-20 | Benzimidazole derivatives as mek inhibitors |
JP2006524761A JP5026076B2 (en) | 2003-08-29 | 2004-08-20 | N3 alkylated benzimidazole derivatives as MEK inhibitors |
ES04781809.1T ES2628959T3 (en) | 2003-08-29 | 2004-08-20 | Benzimidazole derivatives as MEK inhibitors |
IL173935A IL173935A (en) | 2003-08-29 | 2006-02-26 | [6-(4-bromo-2-chlorophenylamino)-7-fluoro-3h-benzoimidazole-5-carbonyl]-aminooxy compounds |
IS8384A IS8384A (en) | 2003-08-29 | 2006-03-29 | Alkylated benzimidazole derivatives as MEK inhibitors |
NO20061432A NO20061432L (en) | 2003-08-29 | 2006-03-29 | N3 alkylated benzimidazole derivatives as MEK inhibitors |
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US10/652,733 US7235537B2 (en) | 2002-03-13 | 2003-08-29 | N3 alkylated benzimidazole derivatives as MEK inhibitors |
US10/652,733 | 2003-08-29 |
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US (2) | US7235537B2 (en) |
EP (1) | EP1663210B1 (en) |
JP (1) | JP5026076B2 (en) |
KR (1) | KR20060121853A (en) |
CN (1) | CN1874768A (en) |
AR (1) | AR045738A1 (en) |
AU (1) | AU2004270166A1 (en) |
BR (1) | BRPI0413152A (en) |
CA (1) | CA2537098A1 (en) |
ES (1) | ES2628959T3 (en) |
IL (1) | IL173935A (en) |
IS (1) | IS8384A (en) |
MX (1) | MXPA06002268A (en) |
NO (1) | NO20061432L (en) |
RU (1) | RU2006109600A (en) |
TW (1) | TW200524879A (en) |
WO (1) | WO2005023251A1 (en) |
ZA (1) | ZA200602588B (en) |
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Also Published As
Publication number | Publication date |
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CN1874768A (en) | 2006-12-06 |
RU2006109600A (en) | 2007-10-10 |
KR20060121853A (en) | 2006-11-29 |
US7235537B2 (en) | 2007-06-26 |
AU2004270166A1 (en) | 2005-03-17 |
EP1663210A4 (en) | 2009-04-22 |
IL173935A0 (en) | 2006-07-05 |
US20040116710A1 (en) | 2004-06-17 |
JP5026076B2 (en) | 2012-09-12 |
ES2628959T3 (en) | 2017-08-04 |
MXPA06002268A (en) | 2006-05-31 |
AR045738A1 (en) | 2005-11-09 |
EP1663210B1 (en) | 2017-04-19 |
IS8384A (en) | 2006-03-29 |
EP1663210A1 (en) | 2006-06-07 |
US7842816B2 (en) | 2010-11-30 |
BRPI0413152A (en) | 2006-10-03 |
ZA200602588B (en) | 2008-07-30 |
NO20061432L (en) | 2006-08-25 |
JP2007504139A (en) | 2007-03-01 |
IL173935A (en) | 2015-08-31 |
TW200524879A (en) | 2005-08-01 |
US20070299063A1 (en) | 2007-12-27 |
CA2537098A1 (en) | 2005-03-17 |
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