EP1001971A1 - Dipeptide and related compounds which inhibit leukocyte adhesion mediated by vla-4 - Google Patents

Dipeptide and related compounds which inhibit leukocyte adhesion mediated by vla-4

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Publication number
EP1001971A1
EP1001971A1 EP98937053A EP98937053A EP1001971A1 EP 1001971 A1 EP1001971 A1 EP 1001971A1 EP 98937053 A EP98937053 A EP 98937053A EP 98937053 A EP98937053 A EP 98937053A EP 1001971 A1 EP1001971 A1 EP 1001971A1
Authority
EP
European Patent Office
Prior art keywords
substimted
heterocyclic
alkyl
aryl
heteroaryl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98937053A
Other languages
German (de)
French (fr)
Inventor
Eugene D. Thorsett
Christopher M. Semko
Michael A. Pleiss
Louis John Lombardo
Francine S. Grant
Darren B. Dressen
Michael S. Dappen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wyeth LLC
Elan Pharmaceuticals LLC
Original Assignee
Elan Pharmaceuticals LLC
American Home Products Corp
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Filing date
Publication date
Application filed by Elan Pharmaceuticals LLC, American Home Products Corp filed Critical Elan Pharmaceuticals LLC
Publication of EP1001971A1 publication Critical patent/EP1001971A1/en
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
    • C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
    • C07K5/06—Dipeptides
    • C07K5/06008—Dipeptides with the first amino acid being neutral
    • C07K5/06017—Dipeptides with the first amino acid being neutral and aliphatic
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
    • C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
    • C07K5/06—Dipeptides
    • C07K5/06008—Dipeptides with the first amino acid being neutral
    • C07K5/06017—Dipeptides with the first amino acid being neutral and aliphatic
    • C07K5/06026—Dipeptides with the first amino acid being neutral and aliphatic the side chain containing 0 or 1 carbon atom, i.e. Gly or Ala
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P11/00—Drugs for disorders of the respiratory system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
    • A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/12—Antivirals
    • A61P31/14—Antivirals for RNA viruses
    • A61P31/18—Antivirals for RNA viruses for HIV
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • A61P9/10—Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
    • C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
    • C07K5/06—Dipeptides
    • C07K5/06104—Dipeptides with the first amino acid being acidic
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
    • C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
    • C07K5/06—Dipeptides
    • C07K5/06139—Dipeptides with the first amino acid being heterocyclic
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
    • C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
    • C07K5/06—Dipeptides
    • C07K5/06139—Dipeptides with the first amino acid being heterocyclic
    • C07K5/06165—Dipeptides with the first amino acid being heterocyclic and Pro-amino acid; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides

Definitions

  • This invention relates to compounds which inhibit leukocyte adhesion and, in particular, leukocyte adhesion mediated by VLA-4.
  • VLA-4 (also referred to as ⁇ 4 ⁇ l integrin and CD49d/CD29), first identified by Hemler and Takada 1 is a member of the ⁇ 1 integrin family of cell surface receptors, each of which comprises two subunits, an ⁇ chain and a ⁇ chain.
  • VLA-4 contains an ⁇ 4 chain and a ⁇ l chain.
  • VLA-4 for example, binds to fibronectin.
  • VLA-4 is unique among ⁇ j integrins in that it also binds non-matrix molecules that are expressed by endothelial and other cells. These non-matrix molecules include VCAM-1, which is expressed on cytokine-activated human umbilical vein endothelial cells in culture. Distinct epitopes of VLA-4 are responsible for the fibronectin and VCAM-1 binding activities and each activity has been shown to be inhibited independently . 2
  • Intercellular adhesion mediated by VLA-4 and other cell surface receptors is associated with a number of inflammatory responses.
  • activated vascular endothelial cells express molecules that are adhesive for leukocytes.
  • the mechanics of leukocyte adhesion to endothelial cells involves, in part, the recognition and binding of cell surface receptors on leukocytes to the corresponding cell surface molecules on endothelial cells. Once bound, the leukocytes migrate across the blood vessel wall to enter the injured site and release chemical mediators to combat infection.
  • adhesion receptors of the immune system see, for example, Springer 3 and Osborn 4 .
  • Inflammatory brain disorders such as experimental autoimmune encephalomyelitis (EAE), multiple sclerosis (MS) and meningitis, are examples of central nervous system disorders in which the endothelium/leukocyte adhesion mechanism results in destruction to otherwise healthy brain tissue.
  • EAE experimental autoimmune encephalomyelitis
  • MS multiple sclerosis
  • M multiple sclerosis
  • meningitis are examples of central nervous system disorders in which the endothelium/leukocyte adhesion mechanism results in destruction to otherwise healthy brain tissue.
  • BBB blood brain barrier
  • the leukocytes release toxic mediators that cause extensive tissue damage resulting in impaired nerve conduction and paralysis.
  • tissue damage also occurs via an adhesion mechanism resulting in migration or activation of leukocytes.
  • tissue damage also occurs via an adhesion mechanism resulting in migration or activation of leukocytes.
  • the initial insult following myocardial ischemia to heart tissue can be further complicated by leukocyte entry to the injured tissue causing still further insult (Vedder et al. 5 ).
  • inflammatory conditions mediated by an adhesion mechanism include, by way of example, asthma 6"8 , Alzheimer's disease, atherosclerosis 9 10 , AIDS dementia 11 , diabetes 12 14 (including acute juvenile onset diabetis), inflammatory bowel disease 15 (including ulcerative colitis and Crohn's disease), multiple sclerosis 16"17 , rheumatoid arthritis 18"21 , tissue transplantation 22 , tumor metastasis 23"28 , meningitis, encephalitis, stroke, and other cerebral traumas, nephritis, retinitis, atopic dermatitis, psoriasis, myocardial ischemia and acute leukocyte-mediated lung injury such as that which occurs in adult respiratory distress syndrome.
  • This invention provides compounds which bind to VLA-4. Such compounds can be used, for example, to assay for the presence of VLA-4 in a sample and, in pharmaceutical compositions to inhibit cellular adhesion mediated by VLA-4, for example, binding of VCAM-1 to VLA-4.
  • the compounds of this invention have a binding affinity to VLA-4 as expressed by an IC 50 of about 15 ⁇ M or less (as measured by Example 79 below) which compounds are defined by formula I below:
  • R 1 is selected from the group consisting of alkyl, substituted alkyl, aryl, substituted aryl, cycloalkyl, substituted cycloalkyl, heterocyclic, substituted heterocylic, heteroaryl and substituted heteroaryl;
  • R 2 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, cycloalkenyl, substituted cycloalkenyl, heterocyclic, substimted heterocyclic, aryl, substituted aryl, heteroaryl, substituted heteroaryl, and R 1 and R 2 together with the nitrogen atom bound to R 2 and the SO 2 group bound to R 1 can form a heterocyclic or a substimted heterocyclic group;
  • R 3 is selected from the group consisting of hydrogen, alkyl, substimted alkyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic and, when R 2 does not form a heterocyclic group with R 1 , R 2 and R 3 together with the nitrogen atom bound to R 2 and the carbon atom bound to R 3 can form a heterocyclic or a substimted heterocyclic group;
  • ALK is an alkyl group of from 1 to 10 carbon atoms attached via a methylene group (-CH 2 -) to the carbon atom to which it is attached
  • X is selected from the group consisting of substimted alkylcarbonylamino, substimted alkenylcarbonylamino, substimted alkynylcarbonylamino, heterocyclylcarbonylamino, substimted heterocyclylcarbonylamino, acyl, acyloxy, aminocarbonyloxy, acylamino, oxycarbonylamino, alkoxycarbonyl, substimted alkoxycarbonyl, aryloxycarbonyl, substimted aryloxycarbonyl, cycloalkoxycarbonyl, substimted cycloalkoxycarbonyl, heteroaryloxycarbonyl, substimted heteroaryloxycarbonyl, heterocyclyloxycarbony
  • R is hydrogen or alkyl, -S ⁇ alkyl, - S(O) 2 -substimted alkyl, -S(O) 2 -aryl,
  • R 1 when R 1 is -methylphenyl, R 2 and R 3 are joined together with the nitrogen atom bound to R 2 and the carbon atom bound to R 3 to form a pyrrolidinyl ring and Q is -C(O)NH-, then R 5 is not -CH 2 C(O)-O-t-butyl or - CH 2 CH 2 C(O)-O-t-butyl; and B. when R 1 is />-methylphenyl, R 2 is methyl, R 3 is hydrogen and
  • Q is -C(O)NH-, then R 5 is not -CH 2 (N-benzylpiperin-4-yl).
  • the compounds of this invention can also be provided as prodrugs which convert (e.g. , hydrolyze, metabolize, etc.) in vivo to a compound of formula I above.
  • the carboxylic acid of the compound of formula I is modified into a group which, in vivo, will convert to a carboxylic acid (including salts thereof).
  • prodrugs are represented by compounds of formula IA:
  • R 1 is selected from the group consisting of alkyl, substimted alkyl, aryl, substimted aryl, cycloalkyl, substimted cycloalkyl, heterocyclic, substituted heterocylic, heteroaryl and substimted heteroaryl;
  • R 2 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, cycloalkyl, substimted cycloalkyl, cycloalkenyl, substimted cycloalkenyl, heterocyclic, substimted heterocyclic, aryl, substituted aryl, heteroaryl, substituted heteroaryl, and R 1 and R 2 together with the nitrogen atom bound to R 2 and the SO 2 group bound to R 1 can form a heterocyclic or a substimted heterocyclic group;
  • R 3 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic and, when R 2 does not form a heterocyclic group with R 1 , R 2 and R 3 together with the nitrogen atom bound to R 2 and the carbon atom bound to R 3 can form a heterocyclic or a substimted heterocyclic group;
  • X is selected from the group consisting of substimted alkylcarbonylamino, substimted alkenylcarbonylamino, substimted alkynylcarbonylamino, heterocyclylcarbonylamino, substituted heterocyclylcarbonylamino, acyl, acyloxy, aminocarbonyloxy, acylamino, oxycarbonylamino, alkoxycarbonyl, substimted alkoxycarbonyl, aryloxycarbonyl, substimted aryloxycarbonyl, cycloalkoxycarbonyl, substimted cycloalkoxycarbonyl, heteroaryloxycarbonyl, substimted heteroaryloxycarbonyl, heterocyclyloxycarbonyl, substimted heterocyclyloxycarbonyl, substimted heterocyclyloxycarbonyl, cycloalkyl, substimted cycloalkyl, substimted cycloalkyl, substimted
  • R 6 is selected from the group consisting of 2,4-dioxo-tetrahydrofuran- 3-yl (3,4-enol), amino, alkoxy, substimted alkoxy, cycloalkoxy, substimted cycloalkoxy, -O-(N-succinimidyl), -NH-adamantyl, -O-cholest-5-en-3- ⁇ -yl, - NHOY where Y is hydrogen, alkyl, substimted alkyl, aryl, and substimted aryl, -NH(CH 2 ) p COOY where /?
  • R 9 is selected from the group consisting of -C(O)-aryl and -C(O)-substituted aryl and R 10 is selected from the group consisting of hydrogen and -CH 2 COOR u where R 11 is alkyl, and -NHSO 2 Z where Z is alkyl, substimted alkyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic;
  • Q is -C(X)NR 7 - wherein R 7 is selected from the group consisting of hydrogen and alkyl; and X is selected from the group consisting of oxygen and sulfur; and pharmaceutically acceptable salts thereof with the proviso that
  • R 1 is -methylphenyl
  • R 2 and R 3 are joined together with the nitrogen atom bound to R 2 and the carbon atom bound to R 3 to form a pyrrolidinyl ring
  • R 6 is methoxy
  • Q is -C(O)NH-, then R 5 is not -
  • R 1 is selected from the group consisting of alkyl, substimted alkyl, aryl, substituted aryl, heterocyclic, substimted heterocylic, heteroaryl and substimted heteroaryl.
  • R 1 is selected from the group consisting of 4-methylphenyl, methyl, benzyl, n-butyl, 4-chlorophenyl, 1- naphthyl, 2-naphthyl, 4-methoxyphenyl, phenyl, 2,4,6-trimethylphenyl, 2- (methoxycarbonyl)phenyl, 2-carboxyphenyl, 3,5-dichlorophenyl, 4- trifluoromethylphenyl, 3,4-dichlorophenyl, 3,4-dimethoxyphenyl, 4- (CH 3 C(O)NH-)phenyl, 4-trifluoromethoxyphenyl, 4-cyanophenyl, isopropyl, 3,5-di-(trifluoromethyl)phenyl, 4-t-butylphenyl, 4-t-butoxyphenyl, 4- nitrophenyl, 2-thienyl, l-N-methyl-3-methyl-5-chloropyrazol-4-yl,
  • R 2 is hydrogen, methyl, phenyl, benzyl, -(CH 2 ) 2 -2-thienyl, and -(CH 2 ) 2 - ⁇ .
  • R 1 and R 2 together with the nitrogen atom bound to R 2 and the SO 2 group bound to R 1 are joined to form a heterocyclic group or substimted heterocyclic group.
  • Preferred heterocyclic and substimted heterocyclic groups include those having from 5 to 7 ring atoms having 2 to
  • heteroatoms in the ring selected from nitrogen, oxygen and sulfur which ring is optionally fused to another ring such as a phenyl or cyclohexyl ring to provide for a fused ring heterocycle of from 10 to 14 ring atoms having 2 to
  • R'/R 2 joined groups include, by way of example, benzisothiazolony 1 (saccharin-2-yl) .
  • Such heterocyclic rings include azetidinyl (e.g., L-azetidinyl), thiazolidinyl (e.g., L-thiazolidinyl), piperidinyl (e.g. , L-piperidinyl), piperizinyl (e.g., L- piperizinyl), dihydroindolyl (e.g., L-2,3-dihydroindol-2-yl), tetrahydroquinoliny 1 (e.g., L- 1 ,2 , 3 ,4-tetrahydroquinolin-2-yl) , thiomorpholinyl (e.g., L-thiomorpholin-3-yl), pyrrolidinyl (e.g., L- pyrrolidinyl), substimted pyrrolidinyl such as 4-hydroxypyrrolidinyl (e.g., 4- -(or ⁇ -)hydroxy-L
  • 3-thiophenylpyrrolidinyl e.g. , 3- ⁇ -(or ⁇ -)thiophenyl-L-pyrrolidinyl
  • 4-aminopyrrolidinyl e.g., 4- -(or ⁇ -)amino-L-pyrrolidinyl
  • 3-methoxypyrrolidinyl e.g. , 3-c -(or ⁇ -)methoxy-L-pyrrolidinyl
  • 4,4-dimethylpyrrolidinyl substimted piperizinyl such as 4-N-Cbz- piperizinyl, 5-oxopyrrolidinyl (e.g.
  • thiazolidinyl such as 5,5-dimethylthiazolindin-4-yl, 1,1-dioxo-thiazolidinyl (e.g., L- 1 , 1 -dioxo-thiazolidin-2-y 1) , substimted
  • 1,1-dioxo-thiazolidinyl such as L-l,l-dioxo-5,5-dimethylthiazolidin-2-yl, 1,1-dioxothiomorpholinyl (e.g., L-l,l-dioxo-thiomorpholin-3-yl) and the like.
  • R 3 includes all of the isomers arising by substitution with methyl, phenyl, benzyl, diphenylmethyl, -CH 2 CH 2 -COOH, -CH 2 -COOH, 2-amidoethyl, iso-butyl, t- butyl, -CH 2 O-benzyl and hydroxymethyl.
  • R 3 and R 2 together with the nitrogen atom bound to R 2 can form a heterocyclic group or substimted heterocyclic group.
  • Q is preferably -C(O)NH- or -C(S)NH-.
  • R 5 is preferably selected from all possible isomers arising by substitution with the following groups: t-butyl-OC(O)CH 2 -, -CH 2 C(O)NH 2 , CH 2 CH 2 C(O)NH 2 , t-butyl-OC(O)CH 2 CH 2 -, BocNH-(CH 2 ) 4 -, ( ⁇ -CH 2 -OC(O)NH-(CH 2 ) 4 -, benzyloxy-CH 2 -, cyclohexyl-CH 2 -,
  • N-benzylpiperid-4-yl-CH 2 - , N-Boc-piperidin-4-y 1-CH 2 - , N-(phenylcarbonyl)piperidin-4-yl-CH 2 -, allyloxy-C(O)NH-(CH 2 ) 4 -, allyloxy-C(O)NH(CH 2 ) 3 -, allyloxy-C(O)NH(CH 2 ) 2 -, ⁇ -CH , 4-methylphenyl-SO 2 -N(CH 3 )CH 2 C(O)NH(CH 2 ) 4 -, -CH 2 C(O)NH(CH 2 ) 4 ⁇ , -(CH 2 ) 4 NHC(O)CH 2 -3-indolyl , -(CH 2 ) 4 NHC(O)CH 2 CH 2 -3-indolyl , -(CH 2 ) 4 NHC(O)CH 2 O-4-fluorophenyl, -CH
  • R 6 is preferably 2,4-dioxo- tetrahydrofuran-3-yl (3,4-enol), methoxy, ethoxy, zs ⁇ -propoxy, n-butoxy, t-butoxy, cyclopentoxy, ne ⁇ -pentoxy, 2- ⁇ - s ⁇ -propyl-4- ⁇ - methylcyclohexoxy, 2- ⁇ -isopropyl-4- ⁇ -methylcyclohexoxy, - ⁇ H 2 , benzyloxy, -NHCH 2 COOH, -NHCH 2 CH 2 COOH, -NH-adamantyl, -NHCH 2 CH 2 COOCH 2 CH 3 , -NHSO 2 - -CH 3 - ⁇ , -NHOR 8 where R 8 is hydrogen, methyl, w ⁇ -propyl or benzyl, O-(N-succinimidyl), -O-cholest-5-en-3- ⁇ -yl,
  • R' is aryl, heteroaryl or heterocyclic and R" is hydrogen or -CH 2 C(O)OCH 2 CH 3 .
  • ester compounds recited above wherein one ester is replaced with another ester selected from the group consisting of methyl ester, ethyl ester, ⁇ -propyl ester, isopropyl ester, n-butyl ester, isobutyl ester, sec-butyl ester and tert- butyl ester.
  • This invention also provides methods for binding VLA-4 in a biological sample which method comprises contacting the biological sample with a compound of formula I or IA above under conditions wherein said compound binds to VLA-4.
  • Certain of the compounds of formula I and IA above are also useful in reducing VLA-4 mediated inflammation in vivo.
  • compositions comprising a pharmaceutically acceptable carrier and a therapeutically effective amount of one or more the compounds of formula I or IA above with the exception that R 3 and R 5 are derived from L-amino acids or other similarly configured starting materials. Alternatively, racemic mixtures can be used.
  • the pharmaceutical compositions may be used to treat VLA-4 mediated disease conditions.
  • disease conditions include, by way of example, asthma, Alzheimer's disease, atherosclerosis, AIDS dementia, diabetes (including acute juvenile onset diabetis), inflammatory bowel disease (including ulcerative colitis and Crohn' s disease), multiple sclerosis, rheumatoid arthritis, tissue transplantation, tumor metastasis, meningitis, encephalitis, stroke, and other cerebral traumas, nephritis, retinitis, atopic dermatitis, psoriasis, myocardial ischemia and acute leukocyte-mediated lung injury such as that which occurs in adult respiratory distress syndrome.
  • this invention also provides methods for the treatment of an inflammatory disease in a patient mediated by VLA-4 which methods comprise administering to the patient the pharmaceutical compositions described above.
  • Preferred compounds of formula I and IA above include those set forth in Table I below:
  • R 2 /R 3 cyclic allyloxy-C(O)NH-(CH 2 ) 4 -OH H di(trifluoro- 3 carbon atoms methyl)phenyl (L-pyrrolidinyl) -CH 3 - ⁇ - -CH, H alIyloxy-C(O)NH-(CH 2 ) 4 - -OH H
  • R 1 R 2 R 3 R 5 R 6 Q -C(O)NR 7 - R 7 p-CH 3 - ⁇ - -CH, H -(CH 2 ) 2 C(O)NHCH(CH 3 ) ⁇ -OH H
  • this invention relates to compounds which inhibit leukocyte adhesion and, in particular, leukocyte adhesion mediated by VLA- 4.
  • VLA- 4 leukocyte adhesion mediated by VLA- 4.
  • alkyl refers to alkyl groups preferably having from 1 to 10 carbon atoms and more preferably 1 to 6 carbon atoms. This term is exemplified by groups such as methyl, t-butyl, n-heptyl, octyl and the like.
  • Substimted alkyl refers to an alkyl group, preferably of from 1 to 10 carbon atoms, having from 1 to 5 substituents selected from the group consisting of alkoxy, substimted alkoxy, acyl, acylamino, thiocarbonylamino, acyloxy, amino, amidino, alkyl amidino,thioamidino, aminoacyl, aminocarbonylamino, amino thiocarbonylamino, aminocarbonyloxy, aryl, substimted aryl, aryloxy, substimted aryloxy, aryloxylaryl, substimted aryloxy aryl, cyano, halogen, hydroxyl, nitro, carboxyl, carboxylalkyl, carboxyl-substituted alkyl, carboxyl-cycloalkyl, carboxyl-substimted cycloalkyl, carboxylaryl, carboxyl-substituted aryl, carboxy
  • Alkoxy refers to the group “alkyl-O-" which includes, by way of example, methoxy, ethoxy, «-propoxy, s ⁇ -propoxy, n-butoxy, tert-butoxy, sec-butoxy, -pentoxy, n-hexoxy, 1,2-dimethylbutoxy, and the like.
  • Substimted alkoxy refers to the group “substimted alkyl-O-”.
  • Acyl refers to the groups H-C(O)-, alkyl-C(O)-, substimted alkyl- C(O)-, alkenyl-C(O)-, substimted alkenyl-C(O)-, alkynyl-C(O)-, substimted alkynyl-C(O)- cycloalkyl-C(O)-, substimted cycloalkyl-C(O)-, aryl-C(O)-, substimted aryl-C(O)-, heteroaryl-C(O)-, substimted heteroaryl-C(O), heterocyclic-C(O)-, and substimted heterocyclic-C(O)- provided that a nitrogen atom of the heterocyclic or substimted heterocyclic is not bound to the -C(O)- group
  • acylamino refers to the group -C(O)NRR where each R is independently selected from the group consisting of hydrogen, alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, aryl, substimted aryl, cycloalkyl, substimted cycloalkyl, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic and where each R is joined to form together with the nitrogen atom a heterocyclic or substimted heterocyclic ring wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic and
  • substimted alkylcarbonylamino refers only to the acylamino group -C(O)NRR where each R is independently selected from hydrogen, alkyl, substimted alkyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic provided that at least one R is substimted alkyl.
  • substimted alkenylcarbonylamino refers only to the acylamino group -C(O)NRR where each R is independently selected from hydrogen, alkyl, alkenyl, substimted alkenyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic provided that at least one R is substimted alkenyl.
  • substimted alkynylcarbonylamino refers only to the acylamino group -C(O)NRR where each R is independently selected from hydrogen, alkyl, alkynyl, substimted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic provided that at least one R is substimted alkynyl.
  • heterocyclylcarbonylamino refers only to the acylamino group -C(O)NRR where each R is independently selected from hydrogen, alkyl, substimted alkyl, alkenyl, substimted alkenyl alkynyl, substimted alkynyl, cycloalkyl, substituted cycloalkyl, aryl, substimted aryl, heteroaryl, substituted heteroaryl, heterocyclic and substimted heterocyclic provided that at least one R is heterocyclic.
  • Thiocarbonylamino refers to the group -C(S)NRR where each R is independently selected from the group consisting of hydrogen, alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, aryl, substimted aryl, cycloalkyl, substimted cycloalkyl, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic and where each R is joined to form, together with the nitrogen atom a heterocyclic or substituted heterocyclic ring wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted hetero
  • Acyloxy refers to the groups alkyl-C(O)O-, substimted alkyl- C(O)O-, alkenyl-C(O)O-, substimted alkenyl-C(O)O-, alkynyl-C(O)O-, substimted alkynyl-C(O)O-, aryl-C(O)O-, substimted aryl-C(O)O-, cycloalkyl-C(O)O-, substimted cycloalkyl-C(O)O-, heteroaryl-C(O)O-, substimted heteroaryl-C(O)O-, heterocyclic-C(O)O-, and substimted heterocyclic-C(O)O- wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, cycloalkyl,
  • Alkenyl refers to alkenyl group preferably having from 2 to 10 carbon atoms and more preferably 2 to 6 carbon atoms and having at least 1 and preferably from 1-2 sites of alkenyl unsaturation.
  • Substimted alkenyl refers to alkenyl groups having from 1 to 5 substituents selected from the group consisting of alkoxy, substimted alkoxy, acyl, acylamino, thiocarbonylamino, acyloxy, amino, amidino, alkylamidino, thioamidino, aminoacyl, aminocarbonylamino, aminothiocarbonylamino, aminocarbonyloxy, aryl, substimted aryl, aryloxy, substimted aryloxy, aryloxyaryl, substimted aryloxyaryl, halogen, hydroxyl, cyano, nitro, carboxyl, carboxylalkyl, carboxyl-substimted alkyl, carboxyl- cycloalkyl, carboxyl-substimted cycloalkyl, carboxylaryl, carboxyl- substimted aryl, carboxylheteroaryl, carboxyl-subs
  • Alkynyl refers to alkynyl group preferably having from 2 to 10 carbon atoms and more preferably 3 to 6 carbon atoms and having at least 1 and preferably from 1-2 sites of alkynyl unsaturation.
  • “Substimted alkynyl” refers to alkynyl groups having from 1 to 5 substiments selected from the group consisting of alkoxy, substimted alkoxy, acyl, acylamino, thiocarbonylamino, acyloxy, amino, amidino, alkylamidino, thioamidino, aminoacyl, aminocarbonylamino, aminothiocarbonylamino, aminocarbonyloxy, aryl, substimted aryl, aryloxy, substimted aryloxy, aryloxyaryl, substimted aryloxyaryl, halogen, hydroxyl, cyano, nitro, carboxyl, carboxylalkyl, carboxyl-substim
  • Aminoacyl refers to the groups -NRC(O)alkyl, -NRC(O)substituted alkyl, -NRC(O)cycloalkyl, -NRC(O)substimted cycloalkyl, -NRC(O)alkenyl, -NRC(O)substimted alkenyl, -NRC(O)alkynyl, -NRC(O)substimted alkynyl, -NRC(O)aryl, -NRC(O)substimted aryl, -NRC(O)heteroaryl, -NRC(O)substituted heteroaryl, -NRC(O)heterocyclic, and -NRC(O)substimted heterocyclic where R is hydrogen or alkyl and wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substituted
  • Aminocarbonyloxy refers to the groups -NRC(O)O-alkyl, -NRC(O)O-substimted alkyl, -NRC(O)O-alkenyl, -NRC(O)O-substimted alkenyl, -NRC(O)O-alkynyl, -NRC(O)O-substimted alkynyl, -NRC(O)O- cycloalkyl, -NRC(O)O-substimted cycloalkyl, -NRC(O)O-aryl, -NRC(O)O- substituted aryl, -NRC(O)O-heteroaryl, -NRC(O)O-substimted heteroaryl, -NRC(O)O-heterocyclic, and -NRC(O)O-substimted heterocyclic where R is hydrogen or alkyl and wherein alkyl, substim
  • Oxycarbonylamino refers to the groups -OC(O)NH 2 , -OC(O)NRR, -OC(O)NR-alkyl, -OC(O)NR-substituted alkyl, -OC(O)NR-alkenyl, -OC(O)NR-substituted alkenyl, -OC(O)NR-alkynyl, -OC(O)NR-substituted alkynyl, -OC(O)NR-cycloalkyl, -OC(O)NR-substituted cycloalkyl, -OC(O)NR-aryl, -OC(O)NR-substimted aryl, -OC(O)NR-heteroaryl,
  • R is hydrogen, alkyl or where each R is joined to form, together with the nitrogen atom a heterocyclic or substimted heterocyclic ring and wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic are as defined herein.
  • Oxy thiocarbonylamino refers to the groups -OC(S)NH 2 , -OC(S)NRR, -OC(S)NR-alkyl, -OC(S)NR-substituted alkyl, -OC(S)NR- alkenyl, -OC(S)NR-substituted alkenyl, -OC(S)NR-alkynyl, -OC(S)NR- substituted alkynyl, -OC(S)NR-cycloalkyl, -OC(S)NR-substituted cycloalkyl, -OC(S)NR-aryl, -OC(S)NR-substituted aryl, -OC(S)NR-heteroaryl, - OC(S)NR-substimted heteroaryl, -OC(S)NR-heterocyclic, and -OC(S)NR-substimted heterocyclic where R is hydrogen,
  • Aminocarbonylamino refers to the groups -NRC(O)NRR, -NRC(O)NR-alkyl, -NRC(O)NR-substituted alkyl, -NRC(O)NR-alkenyl, -NRC(O)NR-substituted alkenyl, -NRC(O)NR-alkynyl,
  • each R is independently hydrogen, alkyl or where each R is joined to form together with the nitrogen atom a heterocyclic or substimted heterocyclic ring as well as where one of the amino groups is blocked by conventional blocking groups such as Boc, Cbz, formyl, and the like and wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl
  • Aminothiocarbonylamino refers to the groups -NRC(S)NRR, -NRC(S)NR-alkyl, -NRC(S)NR-substituted alkyl, -NRC(S)NR-alkenyl,
  • Aryl or “Ar” refers to an unsaturated aromatic carbocyclic group of from 6 to 14 carbon atoms having a single ring (e.g., phenyl) or multiple condensed rings (e.g. , naphthyl or anthryl) which condensed rings may or may not be aromatic (e.g. , 2-benzoxazolinone, 2H-l ,4-benzoxazin-3(4H)- one-7yl, and the like).
  • Preferred aryls include phenyl and naphthyl.
  • Substimted aryl refers to aryl groups which are substimted with from
  • Aryloxy refers to the group aryl-O- which includes, by way of example, phenoxy, naphthoxy, and the like.
  • Substimted aryloxy refers to substimted aryl-O- groups.
  • Aryloxyaryl refers to the group -aryl-O-aryl.
  • Substimted aryloxyaryl refers to aryloxyaryl groups substimted with from 1 to 3 substiments on either or both aryl rings selected from the group consisting of hydroxy, acyl, acylamino, thiocarbonylamino, acyloxy, alkyl, substimted alkyl, alkoxy, substimted alkoxy, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, amidino, alkylamidino, thioamidino, amino, aminoacyl, aminocarbonyloxy, aminocarbonylamino, ammothiocarbonylamino, aryl, substimted aryl, aryloxy, substimted aryloxy, cycloalkoxy, substimted cycloalkoxy, heteroaryloxy, substimted heteroaryloxy, heterocyclyloxy, substimted heterocyclyloxy, carboxyl
  • Cycloalkyl refers to cyclic alkyl groups of from 3 to 8 carbon atoms having a single cyclic ring including, by way of example, cyclopropyl, cyclobutyl, cyclopentyl, cyclooctyl and the like. Excluded from this definition are multi-ring alkyl groups such as adamantanyl, etc.
  • Cycloalkenyl refers to cyclic alkenyl groups of from 3 to 8 carbon atoms having single or multiple unsaturation but which are not aromatic.
  • Cycloalkoxy refers to -O-cycloalkyl groups.
  • “Substimted cycloalkoxy” refers to -O-substituted cycloalkyl groups.
  • Halo or halogen refers to fluoro, chloro, bromo and iodo and preferably is either chloro or bromo.
  • Heteroaryl refers to an aromatic carbocyclic group of from 2 to 10 carbon atoms and 1 to 4 heteroatoms selected from oxygen, nitrogen and sulfur within the ring.
  • Such heteroaryl groups can have a single ring (e.g., pyridyl or furyl) or multiple condensed rings (e.g., indolizinyl or benzothienyl).
  • Preferred heteroaryls include pyridyl, pyrrolyl, indolyl and furyl.
  • Substimted heteroaryl refers to heteroaryl groups which are substimted with from 1 to 3 substiments selected from the group consisting of hydroxy, acyl, acylamino, thiocarbonylamino, acyloxy, alkyl, substimted alkyl, alkoxy, substimted alkoxy, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, amidino, alkylamidino, thioamidino, amino, aminoacyl, aminocarbonyloxy, aminocarbonylamino, aminothiocarbonylamino, aryl, substimted aryl, aryloxy, substimted aryloxy, cycloalkoxy, substimted cycloalkoxy, heteroaryloxy, substimted heteroaryloxy, heterocyclyloxy, substituted heterocyclyloxy, carboxyl, carboxylalkyl, carboxyl-substimted
  • Heteroaryloxy refers to the group -O-heteroaryl and "substimted heteroaryloxy” refers to the group -O-substituted heteroaryl.
  • Heterocycle or “heterocyclic” refers to a saturated or unsaturated group having a single ring or multiple condensed rings, from 1 to 10 carbon atoms and from 1 to 4 hetero atoms selected from nitrogen, sulfur or oxygen within the ring wherein, in fused ring systems, one or more the rings can be aryl or heteroaryl.
  • “Saturated heterocyclic” refers to heterocycles of single or multiple condensed rings lacking unsaturation in any ring (e.g. , carbon to carbon unsaturation, carbon to nitrogen unsaturation, nitrogen to nitrogen unsaturation, and the like).
  • Unsaturated heterocyclic refers to non-aromatic heterocycles of single or multiple condensed rings having unsaturation in any ring (e.g. , carbon to carbon unsaturation, carbon to nitrogen unsaturation, nitrogen to nitrogen unsaturation, and the like).
  • heterocycles and heteroaryls include, but are not limited to, azetidine, pyrrole, imidazole, pyrazole, pyridine, pyrazine, pyrimidine, pyridazine, indolizine, isoindole, indole, dihydroindole, indazole, purine, quinolizine, isoquinoline, quinoline, phthalazine, naphthylpyridine, quinoxaline, quinazoline, cinnoline, pteridine, carbazole, carboline, phenanthridine, acridine, phenanthroline, isothiazole, phenazine, isoxazole, phenoxazine, phenothiazine, imidazolidine, imidazoline, piperidine, piperazine, indoline, phthalimide, 1,2,3,4-tetrahydroisoquinoline, 4,5,6,
  • “Saturated substimted heterocyclic” refers to substimted heterocycles of single or multiple condensed rings lacking unsamration in any ring (e.g., carbon to carbon unsamration, carbon to nitrogen unsamration, nitrogen to nitrogen unsamration, and the like).
  • Unsaturated substimted heterocyclic refers to non-aromatic substimted heterocycles of single or multiple condensed rings having unsamration in any ring (e.g., carbon to carbon unsamration, carbon to nitrogen unsamration, nitrogen to nitrogen unsamration, and the like).
  • Heterocyclyloxy refers to the group -O-heterocyclic and “substimted heterocyclyloxy” refers to the group -O-substimted heterocyclic.
  • Thiol refers to the group -SH.
  • Thioalkyl refers to the groups -S-alkyl
  • Substimted thioalkyl refers to the group -S-substimted alkyl.
  • Thiocycloalkyl refers to the groups -S-cycloalkyl.
  • Substimted thiocycloalkyl refers to the group -S-substimted cycloalkyl.
  • Thioaryl refers to the group -S-aryl and "substimted thioaryl” refers t the group -S-substimted aryl.
  • Thioheteroaryl refers to the group -S-heteroaryl and "substimted thioheteroaryl” refers to the group -S-substimted heteroaryl.
  • Thioheterocyclic refers to the group -S-heterocyclic and "substimted thioheterocyclic” refers to the group -S-substimted heterocyclic.
  • “Pharmaceutically acceptable salt” refers to pharmaceutically acceptable salts of a compound of Formula I which salts are derived from a variety of organic and inorganic counter ions well known in the art and include, by way of example only, sodium, potassium, calcium, magnesium, ammonium, tetraalkylammonium, and the like; and when the molecule contains a basic functionality, salts of organic or inorganic acids, such as hydrochloride, hydrobromide, tartrate, mesylate, acetate, maleate, oxalate and the like.
  • the compounds of this invention can be prepared from readily available starting materials using the following general methods and procedures. It will be appreciated that where typical or preferred process conditions (i.e. , reaction temperatures, times, mole ratios of reactants, solvents, pressures, etc.) are given, other process conditions can also be used unless otherwise stated. Optimum reaction conditions may vary with the particular reactants or solvent used, but such conditions can be determined by one skilled in the art by routine optimization procedures.
  • protecting groups may be necessary to prevent certain functional groups from undergoing undesired reactions.
  • Suitable protecting groups for various functional groups as well as suitable conditions for protecting and deprotecting particular functional groups are well known in the art. For example, numerous protecting groups are described in T. W. Greene and G. M. Wuts, Protecting Groups in Organic Synthesis, Second Edition, Wiley, New York, 1991, and references cited therein.
  • the compounds of this invention will typically contain one or more chiral centers. Accordingly, if desired, such compounds can be prepared or isolated as pure stereoisomers, i.e. , as individual enantiomers or diastereomers, or as stereoisomer-enriched mixmres. All such stereoisomers (and enriched mixmres) are included within the scope of this invention, unless otherwise indicated. Pure stereoisomers (or enriched mixmres) may be prepared using, for example, optically active starting materials or stereoselective reagents well-known in the art. Alternatively, racemic mixmres of such compounds can be separated using, for example, chiral column chromatography, chiral resolving agents and the like. In a preferred method of synthesis, the compounds of formula I and IA wherein Q is -C(O)NR 7 - are prepared by first coupling an amino acid of formula II:
  • R 1 is as defined above, to provide an N-sulfonyl amino acid of formula IV:
  • R ! -R 3 are as defined above.
  • This reaction is typically conducted by reacting the amino acid of formula II with at least one equivalent, preferably about 1.1 to about 2 equivalents, of sulfonyl chloride III in an inert diluent such as dichloromethane and the like. Generally, the reaction is conducted at a temperamre ranging from about -70 °C to about 40 °C for about 1 to about 24 hours. Preferably, this reaction is conducted in the presence of a suitable base to scavenge the acid generated during the reaction. Suitable bases include, by way of example, tertiary amines, such as triethylamine, diisopropylethylamme, N-methylmorpholine and the like.
  • reaction can be conducted under Schotten-Baumann-type conditions using aqueous alkali, such as sodium hydroxide and the like, as the base.
  • aqueous alkali such as sodium hydroxide and the like
  • the resulting N-sulfonyl amino acid IV is recovered by conventional methods including neutralization, extraction, precipitation, chromatography, filtration, and the like.
  • amino acids of formula II employed in the above reaction are either known compounds or compounds that can be prepared from known compounds by conventional synthetic procedures.
  • suitable amino acids for use in this reaction include, but are not limited to, L-proline, tr ⁇ -4-hydroxyl-L-proline, ' .s-4-hydroxyl-L-proline, trans-3-phenyl-L- proline, -3-phenyl-L-proline, L-(2-mefhyl)proline, L-pipecolinic acid, L- azetidine-2-carboxylic acid, L-indoline-2-carboxylic acid, L-1 ,2,3,4- tetrahydroisoquinoline-3-carboxylic acid, L-thiazolidine-4-carboxylic acid, L-(5 ,5-dimethyl)thiazolidine-4-carboxylic acid, L-thiamorpholine-3- carboxylic acid, glycine, 2-tert-butylglycine, D,L-pheny
  • the corresponding carboxylic acid esters of the amino acids of formula II can be employed in the above reaction with the sulfonyl chloride III.
  • the sulfonyl chlorides of formula III employed in the above reaction are either known compounds or compounds that can be prepared from known compounds by conventional synthetic procedures.
  • Such compounds are typically prepared from the corresponding sulfonic acid, i.e., from compounds of the formula R 1 -SO 3 H where R 1 is as defined above, using phosphorous trichloride and phosphorous pentachloride.
  • This reaction is generally conducted by contacting the sulfonic acid with about 2 to 5 molar equivalents of phosphorous trichloride and phosphorous pentachloride, either neat or in an inert solvent, such as dichloromethane, at temperamre in the range of about 0°C to about 80 °C for about 1 to about 48 hours to afford the sulfonyl chloride.
  • the sulfonyl chlorides of formula III can be prepared from the corresponding thiol compound, i.e., from compounds of the formula R ⁇ SH where R 1 is as defined above, by treating the thiol with chlorine (Cl 2 ) and water under conventional reaction conditions.
  • sulfonyl chlorides suitable for use in this invention include, but are not limited to, methanesulfonyl chloride, 2-propanesulfonyl chloride, 1-butanesulfonyl chloride, benzenesulfonyl chloride, 1- naphthalenesulfonyl chloride, 2-naphthalenesulfonyl chloride, p- toluenesulfonyl chloride, ⁇ -toluenesulfonyl chloride, 4- acetamidobenzenesulfonyl chloride, 4-amidinobenzenesulfonyl chloride, 4- tert-butylbenzenesulfonyl chloride, 4-bromobenzenesulfonyl chloride, 2- carboxybenzenesulfonyl chloride, 4-cyanobenzenesulfonyl chloride, 3,4- dichlorobenzenesulfonyl chlor
  • a sulfonyl fluoride, sulfonyl bromide or sulfonic acid anhydride may be used in place of the sulfonyl chloride in the above reaction to form the N-sulfonyl amino acids of formula IV.
  • the intermediate N-sulfonyl amino acids of formula IV can also be prepared by reacting a sulfonamide of formula V:
  • R 1 and R 2 are as defined above, with a carboxylic acid derivative of the formula L(R 3 )CHCOOR or where L is a leaving group, such as chloro, bromo, iodo, mesylate, tosylate and the like, R 3 is as defined above and R is hydrogen or an alkyl group.
  • This reaction is typically conducted by contacting the sulfonamide V with at least one equivalent, preferably 1.1 to 2 equivalents, of the carboxylic acid derivative in the presence of a suitable base, such as triethylamine, in an inert diluent, such as DMF, at a temperamre ranging from about 24 °C to about 37 °C for about 0.5 to about 4 hours.
  • a suitable base such as triethylamine
  • an inert diluent such as DMF
  • carboxylic acid derivatives for use in this reaction are -chloro and -bromocarboxylic acid esters such as tert-butyl bromoacetate and the like.
  • carboxylic acid ester is employed in this reaction, the ester group is subsequently hydrolyzed using conventional procedures to afford an N-sulfonyl amino acid of formula IV.
  • the compounds of formula I are then prepared by coupling the intermediate N-sulfonyl amino acid of formula IV with an amino acid derivative of formula VI:
  • R 5 -R 7 are as defined above and, in addition, R 6 can be hydroxyl.
  • This coupling reaction is typically conducted using well-known coupling reagents such as carbodiimides, BOP reagent (benzotriazol-1-yloxy- tris(dimethylamino)phosphonium hexafluorophosphonate) and the like.
  • Suitable carbodiimides include, by way of example, dicyclohexylcarbodiimide (DCC), l-(3-dimethylaminopropyl)-3- ethylcarbodiimide (EDC) and the like.
  • polymer supported forms of carbodumide coupling reagents may also be used including, for example, those described in Tetrahedron Letters, 34(48), 7685 (1993).
  • well-known coupling promoters such as N-hydroxysuccinimide, 1- hydroxybenzotriazole and the like, may be used to facilitate the coupling reaction.
  • This coupling reaction is typically conducted by contacting the N- sulfonylamino acid IV with about 1 to about 2 equivalents of the coupling reagent and at least one equivalent, preferably about 1 to about 1.2 equivalents, of amino acid derivative VI in an inert diluent, such as dichloromethane, chloroform, acetonitrile, tetrahydrofuran, N,N- dimethylformamide and the like.
  • an inert diluent such as dichloromethane, chloroform, acetonitrile, tetrahydrofuran, N,N- dimethylformamide and the like.
  • this reaction is conducted at a temperamre ranging from about 0°C to about 37°C for about 12 to about 24 hours.
  • the compound of formula I is recovered by conventional methods including neutralization, extraction, precipitation, chromatography, filtration, and the like.
  • the N-sulfonyl amino acid IV can be converted into an acid halide and the acid halide coupled with amino acid derivative VI to provide compounds of formula I.
  • the acid halide of VI can be prepared by contacting VI with an inorganic acid halide, such as thionyl chloride, phosphorous trichloride, phosphorous tribromide or phosphorous pentachloride, or preferably, with oxalyl chloride under conventional conditions.
  • this reaction is conducted using about 1 to 5 molar equivalents of the inorganic acid halide or oxalyl chloride, either neat or in an inert solvent, such as dichloromethane or carbon tetrachloride, at temperature in the range of about 0°C to about 80 °C for about 1 to about 48 hours.
  • a catalyst such as N,N-dimethylformamide, may also be used in this reaction.
  • the acid halide of N-sulfonyl amino acid IV is then contacted with at least one equivalent, preferably about 1.1 to about 1.5 equivalents, of amino acid derivative VI in an inert diluent, such as dichloromethane, at a temperamre ranging from about -70 °C to about 40 °C for about 1 to about 24 hours.
  • this reaction is conducted in the presence of a suitable base to scavenge the acid generated during the reaction.
  • Suitable bases include, by way of example, tertiary amines, such as triethylamine, diisopropylethylamine, N-methylmorpholine and the like.
  • the reaction can be conducted under Schotten-Baumann-type conditions using aqueous alkali, such as sodium hydroxide and the like.
  • aqueous alkali such as sodium hydroxide and the like.
  • the compound of formula I is recovered by conventional methods including neutralization, extraction, precipitation, chromatography, filtration, and the like.
  • the compounds of formula I can be prepared by first forming a diamino acid derivative of formula VII:
  • diamino acid derivatives of formula VII can be readily prepared by coupling an amino acid of formula II with an amino acid derivative of formula VI using conventional amino acid coupling techniques and reagents, such carbodiimides, BOP reagent and the like, as described above. Diamino acid VII can then be sulfonated using a sulfonyl chloride of formula III and using the synthetic procedures described above to provide a compound of formula I.
  • amino acid derivatives of formula VI employed in the above reactions are either known compounds or compounds that can be prepared from known compounds by conventional synthetic procedures.
  • amino acid derivatives of formula VI can be prepared by C- alkylating commercially available diethyl 2-acetamidomalonate (Aldrich, Milwaukee, Wisconsin, USA) with an alkyl or substimted alkyl halide. This reaction is typically conducted by treating the diethyl 2-acetamidomalonate with at least one equivalent of sodium ethoxide and at least one equivalent of an alkyl or substimted alkyl halide in refluxing ethanol about 6 to about 12 hours.
  • the resulting C-alkylated malonate is then deacetylated, hydro lyzed and decarboxylated by heating in aqueous hydrochloric acid at reflux for about 6 to about 12 hours to provide the amino acid, typically as the hydrochloride salt.
  • amino acid derivatives of formula VI suitable for use in the above reactions include, but are not limited to, ⁇ -tert-butyl-L-aspartic acid methyl ester, L-asparagine tert-butyl ester, e-Boc-L-lysine methyl ester, e-Cbz-L-lysine methyl ester, ⁇ -tert-butyl-L-glutamic acid methyl ester, L- glutamine tert-butyl ester, and the like. If desired, of course, other esters or amides of the above-described compounds may also be employed.
  • the compounds of formula I are typically prepared as an ester, i.e., where R 6 is an alkoxy or substimted alkoxy group and the like.
  • the ester group can be hydrolysed using conventional conditions and reagents to provide the corresponding carboxylic acid.
  • this reaction is conducted by treating the ester with at least one equivalent of an alkali metal hydroxide, such as lithium, sodium or potassium hydroxide, in an inert diluent, such as methanol or mixmres of methanol and water, at a temperamre ranging about 0°C to about 24°C for about 1 to about 12 hours.
  • benzyl esters may be removed by hydrogenolysis using a palladium catalyst, such as palladium on carbon.
  • the resulting carboxylic acids may be coupled, if desired, to amines such as ⁇ -alanine ethyl ester, hydroxyamines such as hydroxylamine and N- hydroxysuccinimide, alkoxyamines and substimted alkoxyamines such as O- methylhydroxylamine and O-benzylhydroxylamine, and the like, using conventional coupling reagents and conditions as described above.
  • a nitro group present on a substiment of a compound of formula I or an intermediate thereof may be readily reduced by hydrogenation in the presence of a palladium catalyst, such as palladium on carbon, to provide the corresponding amino group.
  • a palladium catalyst such as palladium on carbon
  • This reaction is typically conducted at a temperamre of from about 20 °C to about 50 °C for about 6 to about 24 hours in an inert diluent, such as methanol.
  • Compounds having a nitro group on the R 3 substiment can be prepared, for example, by using a 4- nitrophenylalanine derivative and the like in the above-described coupling reactions.
  • a pyridyl group can be hydrogenated in the presence of a platinum catalyst, such as platinum oxide, in an acidic diluent to provide the corresponding piperidinyl analogue.
  • a platinum catalyst such as platinum oxide
  • this reaction is conducted by treating the pyridine compound with hydrogen at a pressure ranging from about 20 psi to about 60 psi, preferably about 40 psi, in the presence of the catalyst at a temperamre of about 20 °C to about 50 °C for about 2 to about 24 hours in an acidic diluent, such as a mixture of methanol and aqueous hydrochloric acid.
  • R 5 substiment of a compound of formula I or an intermediate thereof contains a primary or secondary amino group
  • such amino groups can be further derivatized either before or after the above coupling reactions to provide, by way of example, amides, sulfonamides, ureas, thioureas, carbamates, secondary or tertiary amines and the like.
  • Compounds having a primary amino group on the R 5 substiment may be prepared, for example, by reduction of the corresponding nitro compound as described above.
  • such compounds can be prepared by using an amino acid derivative of formula VI derived from lysine, and the like in the above-described coupling reactions.
  • a compound of formula I or an intermediate thereof having a substiment containing a primary or secondary amino group, such as where R 5 is a 4-aminobutyl group can be readily N-acylated using conventional acylating reagents and conditions to provide the corresponding amide.
  • This acylation reaction is typically conducted by treating the amino compound with at least one equivalent, preferably about 1.1 to about 1.2 equivalents, of a carboxylic acid in the presence of a coupling reagent such as a carbodumide, BOP reagent (benzotriazol-1-yloxy- tris(dimethylamino)phosphonium hexafluorophosphonate) and the like, in an inert diluent, such as dichloromethane, chloroform, acetonitrile, tetrahydromran, N,N-dimethylformamide and the like, at a temperamre ranging from about 0°C to about 37 °C for about 4 to about 24 hours.
  • a coupling reagent such as a carbodumide, BOP reagent (benzotriazol-1-yloxy- tris(dimethylamino)phosphonium hexafluorophosphonate) and the like
  • a promoter such as N-hydroxysuccinimide, 1- hydroxybenzotriazole and the like, is used to facilitate the acylation reaction.
  • carboxylic acids suitable for use in this reaction include, but are not limited to, N-tert-butyloxycarbonylglycine, N-tert-butyloxycarbonyl-L- phenylalanine, N-tert-butyloxycarbonyl-L-aspartic acid benzyl ester, benzoic acid, N-tert-butyloxycarbonylisonipecotic acid, N-methylisonipecotic acid, N-tert-butyloxycarbonylnipecotic acid, N-tert-butyloxycarbonyl-L- tetrahydroisoquinoline-3-carboxylic acid, N-(toluene-4-sulfonyl)-L-proline and the like.
  • a compound of formula I or an intermediate thereof containing a primary or secondary amino group can be N-acylated using an acyl halide or a carboxylic acid anhydride to form the corresponding amide.
  • This reaction is typically conducted by contacting the amino compound with at least one equivalent, preferably about 1.1 to about 1.2 equivalents, of the acyl halide or carboxylic acid anhydride in an inert diluent, such as dichloromethane, at a temperamre ranging from about of about -70 °C to about 40°C for about 1 to about 24 hours.
  • an acylation catalyst such as 4-(N,N-dimethylamino)pyridine may be used to promote the acylation reaction.
  • the acylation reaction is preferably conducted in the presence of a suitable base to scavenge the acid generated during the reaction.
  • Suitable bases include, by way of example, tertiary amines, such as triethylamine, diisopropylethylamme, N-methylmorpholine and the like.
  • reaction can be conducted under Schotten-Baumann-type conditions using aqueous alkali, such as sodium hydroxide and the like.
  • aqueous alkali such as sodium hydroxide and the like.
  • acyl halides and carboxylic acid anhydrides suitable for use in this reaction include, but are not limited to, 2-methylpropionyl chloride, trimethylacetyl chloride, phenylacetyl chloride, benzoyl chloride, 2-bromobenzoyl chloride, 2-methylbenzoyl chloride, 2- trifluoromethylbenzoyl chloride, isonicotinoyl chloride, nicotinoyl chloride, picolinoyl chloride, acetic anhydride, succinic anhydride, and the like.
  • Carbamyl chlorides such as N,N-dimethylcarbamyl chloride, N,N- diethylcarbamyl chloride and the like, can also be used in this reaction to provide ureas.
  • dicarbonates such as di-tert-butyl dicarbonate, may be employed to provide carbamates.
  • a compound of formula I or an intermediate thereof containing a primary or secondary amino group may be N-sulfonated to form a sulfonamide using a sulfonyl halide or a sulfonic acid anhydride.
  • Sulfonyl halides and sulfonic acid anhydrides suitable for use in this reaction include, but are not limited to, methanesulfonyl chloride, chloromethanesulfonyl chloride, p-toluenesulfonyl chloride, trifluoromethanesulfonic anhydride, and the like.
  • sulfamoyl chlorides such as dimethylsulfamoyl chloride, can be used to provide sulfamides (e.g. , > ⁇ -SO 2 - ⁇ ⁇ ) .
  • a primary and secondary amino group present on a substiment of a compound of formula I/IA or an intermediate thereof can be reacted with an isocyanate or a thioisocyanate to give a urea or thiourea, respectively.
  • This reaction is typically conducted by contacting the amino compound with at least one equivalent, preferably about 1.1 to about 1.2 equivalents, of the isocyanate or thioisocyanate in an inert diluent, such as toluene and the like, at a temperamre ranging from about 24 °C to about 37 °C for about 12 to about 24 hours.
  • the isocyanates and thioisocyanates used in this reaction are commercially available or can be prepared from commercially available compounds using well-known synthetic procedures. For example, isocyanates and thioisocyanates are readily prepared by reacting the appropriate amine with phosgene or thiophosgene.
  • isocyanates and thioisocyanates suitable for use in this reaction include, but are not limited to, ethyl isocyanate, /j-propyl isocyanate, 4-cyanophenyl isocyanate, 3-methoxyphenyl isocyanate, 2-phenylethyl isocyanate, methyl thioisocyanate, ethyl thioisocyanate, 2-phenylethyl thioisocyanate, 3- phenylpropyl thioisocyanate, 3-(N,N-diethylamino)propyl thioisocyanate, phenyl thioisocyanate, benzyl thioisocyanate, 3-pyridyl thioisocyanate, fluorescein isothiocyanate (isomer I) and the like.
  • the amino group can be reductively alkylated using aldehydes or ketones to form a secondary or tertiary amino group.
  • This reaction is typically conducted by contacting the amino compound with at least one equivalent, preferably about 1.1 to about
  • aldehydes or ketones suitable for use in this reaction include, by way of example, benzaldehyde, 4- chlorobenzaldehyde, valeraldehyde, and the like.
  • hydroxyl group when a compound of formula I/IA or an intermediate thereof has a substiment containing a hydroxyl group, the hydroxyl group can be further modified or derivatized either before or after the above coupling reactions to provide, by way of example, ethers, carbamates and the like.
  • Compounds having a hydroxyl group on, e.g. , the R 3 substituent, for example, can be prepared using an amino acid derivative of formula VI derived from tyrosine and the like in the above-described reactions.
  • a compound of formula I/IA or an intermediate thereof having a substiment containing a hydroxyl group, such as where R 3 is a (4-hydroxyphenyl)methyl group can be readily ( -alkylated to form ethers.
  • This O-alkylation reaction is typically conducted by contacting the hydroxy compound with a suitable alkali or alkaline earth metal base, such as potassium carbonate, in an inert diluent, such as acetone, 2-butanone and the like, to form the alkali or alkaline earth metal salt of the hydroxyl group.
  • This salt is generally not isolated, but is reacted in situ with at least one equivalent of an alkyl or substimted alkyl halide or sulfonate, such as an alkyl chloride, bromide, iodide, mesylate or tosylate, to afford the ether.
  • an alkyl or substimted alkyl halide or sulfonate such as an alkyl chloride, bromide, iodide, mesylate or tosylate
  • this reaction is conducted at a temperamre ranging from about 60 °C to about 150°C for about 24 to about 72 hours.
  • a catalytic amount of sodium or potassium iodide is added to the reaction mixmre when an alkyl chloride or bromide is employed in the reaction.
  • alkyl or substimted alkyl halides and sulfonates suitable for use in this reaction include, but are not limited to, tert-butyl bromoacetate, N-tert-butyl chloroacetamide, 1-bromoethylbenzene, ethyl ⁇ - bromophenylacetate, 2-(N-ethyl-N-phenylamino)ethyl chloride, 2-(N,N- ethylamino)ethyl chloride, 2-(N,N-diisopropylamino)ethyl chloride, 2-(N,N- dibenzylamino)ethyl chloride, 3-(N,N-ethylamino)propyl chloride, 3-(N- benzyl-N-methylamino)propyl chloride, N-(2-chloroethyl)morpholine, 2- (hexamethyleneimino)ethyl chloride, 3-
  • a hydroxyl group present on a substiment of a compound of formula I or an intermediate thereof can be Oalkylating using the Mitsunobu reaction.
  • an alcohol such as 3-(N,N- dimethylamino)-l-propanol and the like, is reacted with about 1.0 to about 1.3 equivalents of triphenylphosphine and about 1.0 to about 1.3 equivalents of diethyl azodicarboxylate in an inert diluent, such as tetrahydrofuran, at a temperamre ranging from about -10°C to about 5°C for about 0.25 to about 1 hour.
  • a compound of formula I or an intermediate thereof containing a aryl hydroxy group can be reacted with an aryl iodide to provide a diary 1 ether.
  • this reaction is conducted by forming the alkali metal salt of the hydroxyl group using a suitable base, such as sodium hydride, in an inert diluent such as xylenes at a temperamre of about -25 °C to about 10°C.
  • the salt is then treated with about 1.1 to about 1.5 equivalents of cuprous bromide dimethyl sulfide complex at a temperamre ranging from about 10°C to about 30°C for about 0.5 to about 2.0 hours, followed by about 1.1 to about 1.5 equivalents of an aryl iodide, such as sodium 2-iodobenzoate and the like.
  • the reaction is then heated to about 70 °C to about 150°C for about 2 to about 24 hours to provide the diary 1 ether.
  • a hydroxy -containing compound can also be readily derivatized to form a carbamate.
  • a hydroxy compound of formula I or an intermediate thereof is contacted with about 1.0 to about 1.2 equivalents of 4-nitrophenyl chloroformate in an inert diluent, such as dichloromethane, at a temperamre ranging from about -25 °C to about 0°C for about 0.5 to about 2.0 hours.
  • Treatment of the resulting carbonate with an excess, preferably about 2 to about 5 equivalents, of a trialkylamine, such as triethylamine, for about 0.5 to 2 hours, followed by about 1.0 to about 1.5 equivalents of a primary or secondary amine provides the carbamate.
  • amines suitable for using in this reaction include, but are not limited to, piperazine, 1- methylpiperazine, 1-acetylpiperazine, morpholine, thiomorpholine, pyrrolidine, piperidine and the like.
  • a hydroxy -containing compound is contacted with about 1.0 to about 1.5 equivalents of a carbamyl chloride in an inert diluent, such as dichloromethane, at a temperamre ranging from about 25 °C to about 70 °C for about 2 to about 72 hours.
  • this reaction is conducted in the presence of a suitable base to scavenge the acid generated during the reaction.
  • suitable bases include, by way of example, tertiary amines, such as triethylamine, diisopropylethylamme, N-methylmorpholine and the like.
  • At least one equivalent (based on the hydroxy compound) of 4- (NN-dimethylamino)pyridine is preferably added to the reaction mixmre to facilitate the reaction.
  • carbamyl chlorides suitable for use in this reaction include, by way of example, dimethylcarbamyl chloride, diethylcarbamyl chloride and the like.
  • hydroxyl groups can be readily converted into a leaving group and displaced to form, for example, amines, sulfides and fluorides.
  • derivatives of 4- hydroxy-L-proline can be converted into the corresponding 4-amino, 4-thio or 4-fluoro-L-proline derivatives via nucleophilic displacement of the derivatized hydroxyl group.
  • the stereochemistry at the carbon atom attached to the derivatized hydroxyl group is typically inverted.
  • These reactions are typically conducted by first converting the hydroxyl group into a leaving group, such as a tosylate, by treatment of the hydroxy compound with at least one equivalent of a sulfonyl halide, such as p-toluenesulfonyl chloride and the like, in pyridine. This reaction is generally conducted at a temperamre of from about 0°C to about 70 °C for about 1 to about 48 hours.
  • the resulting tosylate can then be readily displaced with sodium azide, for example, by contacting the tosylate with at least one equivalent of sodium azide in an inert diluent, such as a mixmre of N,N-dimethylformamide and water, at a temperamre ranging from about 0°C to about 37 °C for about 1 to about 12 hours to provide the corresponding azido compound.
  • an inert diluent such as a mixmre of N,N-dimethylformamide and water
  • the azido group can then be reduced by, for example, hydrogenation using a palladium on carbon catalyst to provide the amino (-
  • a tosylate group can be readily displaced by a thiol to form a sulfide.
  • This reaction is typically conducted by contacting the tosylate with at least one equivalent of a thiol, such as thiophenol, in the presence of a suitable base, such as l,8-diazabicyclo[5.4.0]undec-7-ene (DBU), in an inert diluent, such as N,N-dimethylformamide, at a temperamre of from about 0°C to about 37 °C for about 1 to about 12 hours to provide the sulfide.
  • a suitable base such as l,8-diazabicyclo[5.4.0]undec-7-ene (DBU)
  • an inert diluent such as N,N-dimethylformamide
  • a compound of formula I/IA or an intermediate thereof having a substiment containing an iodoaryl group for example, when R 3 is a (4-iodophenyl)methyl group, can be readily converted either before or after the above coupling reactions into a biaryl compound.
  • this reaction is conducted by treating the iodoaryl compound with about 1.1 to about 2 equivalents of an arylzinc iodide, such as 2- (methoxycarbonyl)phenylzinc iodide, in the presence of a palladium catalyst, such as palladium tetra(triphenylphosphine), in an inert diluent, such as tetrahydrofuran, at a temperamre ranging from about 24°C to about 30°C until reaction completion.
  • a palladium catalyst such as palladium tetra(triphenylphosphine
  • an inert diluent such as tetrahydrofuran
  • the compounds of formula I/IA or intermediates thereof may contain substiments having one or more sulfur atoms.
  • sulfur atoms will be present, for example, when the amino acid of formula II employed in the above reactions is derived from L-thiazolidine-4-carboxylic acid, L-(5,5-dimethyl)thiazolidine-4-carboxylic acid, L-thiamorpholine-3- carboxylic acid and the like.
  • sulfur atoms can be oxidized either before or after the above coupling reactions to provide a sulfoxide or sulfone compound using conventional reagents and reaction conditions.
  • Suitable reagents for oxidizing a sulfide compound to a sulfoxide include, by way of example, hydrogen peroxide, 3-chloroperoxybenzoic acid (MCPBA), sodium periodate and the like.
  • MCPBA 3-chloroperoxybenzoic acid
  • the oxidation reaction is typically conducted by contacting the sulfide compound with about 0.95 to about 1.1 equivalents of the oxidizing reagent in an inert diluent, such as dichloromethane, at a temperamre ranging from about -50°C to about 75 °C for about 1 to about 24 hours.
  • the resulting sulfoxide can then be further oxidized to the corresponding sulfone by contacting the sulfoxide with at least one additional equivalent of an oxidizing reagent, such as hydrogen peroxide, MCPBA, potassium permanganate and the like.
  • an oxidizing reagent such as hydrogen peroxide, MCPBA, potassium permanganate and the like.
  • the sulfone can be prepared directly by contacting the sulfide with at least two equivalents, and preferably an excess, of the oxidizing reagent.
  • Such reactions are described further in March, "Advanced Organic Chemistry” , 4th Ed. , pp. 1201-1202, Wiley publisher, 1992.
  • the compounds of formula I having an R 2 substiment other an hydrogen can be prepared using an N-substituted amino acid of formula II, such as sarcosine, N-methyl-L-phenylalanine and the like, in the above-described coupling reactions.
  • N-substituted amino acid of formula II such as sarcosine, N-methyl-L-phenylalanine and the like
  • such compounds can be prepared by N-alkylation of a sulfonamide of formula I or IV (where R 2 is hydrogen) using conventional synthetic procedures.
  • this N- alkylation reaction is conducted by contacting the sulfonamide with at least one equivalent, preferably 1.1 to 2 equivalents, of an alkyl or substimted alkyl halide in the presence of a suitable base, such as potassium carbonate, in an inert diluent, such as acetone, 2-butanone and the like, at a temperamre ranging from about 25 °C to about 70 °C for about 2 to about 48 hours.
  • a suitable base such as potassium carbonate
  • an inert diluent such as acetone, 2-butanone and the like
  • the sulfonamides of formula I or IV wherein R 2 is hydrogen and R 1 is a 2-alkoxycarbonylaryl group can be intramolecularly cyclized to form l,2-benzisothiazol-3-one derivatives or analogues thereof.
  • This reaction is typically conducted by treating a sulfonamide, such as N-(2- methoxycarbonylphenylsulfonyl)glycine-L-phenylalanine benzyl ester, with about 1.0 to 1.5 equivalents of a suitable base, such as an alkali metal hydride, in a inert diluent, such as tetrahydrofuran, at a temperamre ranging from about 0°C to about 30 °C for about 2 to about 48 hours to afford the cyclized 1 ,2-benzisothiazol-3-one derivative.
  • a sulfonamide such as N-(2- methoxycarbonylphenylsulfonyl)glycine-L-phenylalanine benzyl ester
  • a suitable base such as an alkali metal hydride
  • a inert diluent such as tetrahydrofuran
  • the compounds of formula I where Q is -C(S) ⁇ R 7 - are can prepared by using an amino thionoacid derivative in place of amino acid II in the above described synthetic procedures.
  • amino thionoacid derivatives can be prepared by the procedures described in Shalaky, et al., J. Org. Chem. , 61:9045-9048 (1996) and Brain, et al., J. Org. Chem., 62: 3808- 3809 (1997) and references cited therein.
  • the compounds of formula I and IA are usually administered in the form of pharmaceutical compositions. These compounds can be administered by a variety of routes including oral, rectal, transdermal, subcutaneous, intravenous, intramuscular, and intranasal. These compounds are effective as both injectable and oral compositions. Such compositions are prepared in a manner well known in the pharmaceutical art and comprise at least one active compound.
  • compositions which contain, as the active ingredient, one or more of the compounds of formula I and I A above associated with pharmaceutically acceptable carriers.
  • the active ingredient is usually mixed with an excipient, diluted by an excipient or enclosed within such a carrier which can be in the form of a capsule, sachet, paper or other container.
  • the excipient serves as a diluent, it can be a solid, semi- solid, or liquid material, which acts as a vehicle, carrier or medium for the active ingredient.
  • compositions can be in the form of tablets, pills, powders, lozenges, sachets, cachets, elixirs, suspensions, emulsions, solutions, syrups, aerosols (as a solid or in a liquid medium), ointments containing, for example, up to 10% by weight of the active compound, soft and hard gelatin capsules, suppositories, sterile injectable solutions, and sterile packaged powders.
  • the active compound In preparing a formulation, it may be necessary to mill the active compound to provide the appropriate particle size prior to combining with the other ingredients. If the active compound is substantially insoluble, it ordinarily is milled to a particle size of less than 200 mesh. If the active compound is substantially water soluble, the particle size is normally adjusted by milling to provide a substantially uniform distribution in the formulation, e.g. about 40 mesh.
  • excipients include lactose, dextrose, sucrose, sorbitol, mannitol, starches, gum acacia, calcium phosphate, alginates, tragacanth, gelatin, calcium silicate, microcrystalline cellulose, polyvinylpyrrolidone, cellulose, water, syrup, and methyl cellulose.
  • the formulations can additionally include: lubricating agents such as talc, magnesium stearate, and mineral oil; wetting agents; emulsifying and suspending agents; preserving agents such as methyl- and propylhydroxy- benzoates; sweetening agents; and flavoring agents.
  • the compositions of the invention can be formulated so as to provide quick, sustained or delayed release of the active ingredient after administration to the patient by employing procedures known in the art.
  • compositions are preferably formulated in a unit dosage form, each dosage containing from about 5 to about 100 mg, more usually about 10 to about 30 mg, of the active ingredient.
  • unit dosage forms refers to physically discrete units suitable as unitary dosages for human subjects and other mammals, each unit containing a predetermined quantity of active material calculated to produce the desired therapeutic effect, in association with a suitable pharmaceutical excipient.
  • the active compound is effective over a wide dosage range and is generally administered in a pharmaceutically effective amount. It, will be understood, however, that the amount of the compound acmally administered will be determined by a physician, in the light of the relevant circumstances, including the condition to be treated, the chosen route of administration, the actual compound administered, the age, weight, and response of the individual patient, the severity of the patient's symptoms, and the like.
  • the principal active ingredient is mixed with a pharmaceutical excipient to form a solid preformulation composition containing a homogeneous mixmre of a compound of the present invention.
  • a solid preformulation composition containing a homogeneous mixmre of a compound of the present invention.
  • the active ingredient is dispersed evenly throughout the composition so that the composition may be readily subdivided into equally effective unit dosage forms such as tablets, pills and capsules.
  • This solid preformulation is then subdivided into unit dosage forms of the type described above containing from, for example, 0.1 to about 500 mg of the active ingredient of the present invention.
  • the tablets or pills of the present invention may be coated or otherwise compounded to provide a dosage form affording the advantage of prolonged action.
  • the tablet or pill can comprise an inner dosage and an outer dosage component, the latter being in the form of an envelope over the former.
  • the two components can separated by enteric layer which serves to resist disintegration in the stomach and permit the inner component to pass intact into the duodenum or to be delayed in release.
  • enteric layers or coatings such materials including a number of polymeric acids and mixmres of polymeric acids with such materials as shellac, cetyl alcohol, and cellulose acetate.
  • liquid forms in which the novel compositions of the present invention may be incorporated for administration orally or by injection include aqueous solutions suitably flavored syrups, aqueous or oil suspensions, and flavored emulsions with edible oils such as cottonseed oil, sesame oil, coconut oil, or peanut oil, as well as elixirs and similar pharmaceutical vehicles.
  • compositions for inhalation or insufflation include solutions and suspensions in pharmaceutically acceptable, aqueous or organic solvents, or mixmres thereof, and powders.
  • the liquid or solid compositions may contain suitable pharmaceutically acceptable excipients as described supra.
  • the compositions are administered by the oral or nasal respiratory route for local or systemic effect.
  • Compositions in preferably pharmaceutically acceptable solvents may be nebulized by use of inert gases. Nebulized solutions may be breathed directly from the nebulizing device or the nebulizing device may be attached to a face masks tent, or intermittent positive pressure breathing machine. Solution, suspension, or powder compositions may be administered, preferably orally or nasally, from devices which deliver the formulation in an appropriate manner.
  • Hard gelatin capsules containing the following ingredients are prepared:
  • Quantity Ingredient (mg/capsule)
  • the above ingredients are mixed and filled into hard gelatin capsules in 340 mg quantities.
  • the components are blended and compressed to form tablets, each weighing 240 mg.
  • Formulation Example 3 A dry powder inhaler formulation is prepared containing the following components:
  • Lactose 95 The active mixmre is mixed with the lactose and the mixmre is added to a dry powder inhaling appliance.
  • Formulation Example 4 Tablets, each containing 30 mg of active ingredient, are prepared as follows:
  • Quantity Ingredient (mg/tablet)
  • the active ingredient, starch and cellulose are passed through a No.
  • Quantity Ingredient (mg/capsule)
  • Suppositories each containing 25 mg of active ingredient are made as follows:
  • the active ingredient is passed through a No. 60 mesh U.S. sieve and suspended in the samrated fatty acid glycerides previously melted using the minimum heat necessary.
  • the mixmre is then poured into a suppository mold of nominal 2.0 g capacity and allowed to cool.
  • Purified water to 5.0 ml The medicament, sucrose and xanthan gum are blended, passed through a No. 10 mesh U.S. sieve, and then mixed with a previously made solution of the microcrystalline cellulose and sodium carboxymethyl cellulose in water.
  • the sodium benzoate, flavor, and color are diluted with some of the water and added with stirring. Sufficient water is then added to produce the required volume.
  • Quantity Ingredient (mg/capsule)
  • the active ingredient, cellulose, starch, and magnesium stearate are blended, passed through a No. 20 mesh U.S. sieve, and filled into hard gelatin capsules in 560 mg quantities.
  • composition Example 9 An intravenous formulation may be prepared as follows:
  • a topical formulation may be prepared as follows: Ingredient Quantity
  • the white soft paraffin is heated until molten.
  • the liquid paraffin and emulsifying wax are incorporated and stirred until dissolved.
  • the active ingredient is added and stirring is continued until dispersed.
  • the mixmre is then cooled until solid.
  • transdermal delivery devices Such transdermal patches may be used to provide continuous or discontinuous infusion of the compounds of the present invention in controlled amounts.
  • transdermal patches for the delivery of pharmaceutical agents is well known in the art. See, e.g.. U.S. Patent
  • patches may be constructed for continuous, pulsatile, or on demand delivery of pharmaceutical agents.
  • Direct techniques usually involve placement of a drug delivery catheter into the host's ventricular system to bypass the blood-brain barrier.
  • a drug delivery catheter used for the transport of biological factors to specific anatomical regions of the body is described in U.S. Patent 5,011,472 which is herein incorporated by reference.
  • Indirect techniques usually involve formulating the compositions to provide for drug latentiation by the conversion of hydrophilic drugs into lip id-soluble drugs.
  • Latentiation is generally achieved through blocking of the hydroxy, carbonyl, sulfate, and primary amine groups present on the drug to render the drug more lipid soluble and amenable to transportation across the blood-brain barrier.
  • the delivery of hydrophilic drugs may be enhanced by intra-arterial infusion of hypertonic solutions which can transiently open the blood-brain barrier.
  • the compounds of this invention can be employed to bind VLA-4 (c ⁇ j integrin) in biological samples and, accordingly have utility in, for example, assaying such samples for VLA-4.
  • the compounds can be bound to a solid support and the VLA-4 sample added thereto.
  • the amount of VLA-4 in the sample can be determined by conventional methods such as use of a sandwich ELISA assay.
  • labeled VLA-4 can be used in a competitive assay to measure for the presence of VLA-4 in the sample.
  • Other suitable assays are well known in the art.
  • certain of the compounds of this invention inhibit, in vivo, adhesion of leukocytes to endothelial cells mediated by VLA-4 and, accordingly, can be used in the treatment of diseases mediated by VLA-4.
  • diseases include inflammatory diseases in mammalian patients such as asthma, Alzheimer's disease, atherosclerosis, AIDS dementia, diabetes (including acute juvenile onset diabetes), inflammatory bowel disease (including ulcerative colitis and Crohn 's disease), multiple sclerosis, rheumatoid arthritis, tissue transplantation, tumor metastasis, meningitis, encephalitis, stroke, and other cerebral traumas, nephritis, retinitis, atopic dermatitis, psoriasis, myocardial ischemia and acute leukocyte-mediated lung injury such as that which occurs in adult respiratory distress syndrome.
  • the biological activity of the compounds identified above may be assayed in a variety of systems.
  • a compound can be immobilized on a solid surface and adhesion of cells expressing VLA-4 can be measured. Using such formats, large numbers of compounds can be screened.
  • Cells suitable for this assay include any leukocytes known to express VLA-4 such as T cells, B cells, monocytes, eosinophils, and basophils.
  • a number of leukocyte cell lines can also be used, examples include Jurkat and U937.
  • test compounds can also be tested for the ability to competitively inhibit binding between VLA-4 and VCAM-1, or between VLA-4 and a labeled compound known to bind VLA-4 such as a compound of this invention or antibodies to VLA-4.
  • the VCAM-1 can be immobilized on a solid surface.
  • VCAM-1 may also be expressed as a recombinant fusion protein having an Ig tail (e.g., IgG) so that binding to VLA-4 may be detected in an immunoassay.
  • VCAM-1 expressing cells such as activated endothelial cells or VCAM-1 transfected fibroblasts can be used.
  • the assays described in International Patent Application Publication No. WO 91/05038 are particularly preferred. This application is incorporated herein by reference in its entirety.
  • the labelling systems can be in a variety of forms.
  • the label may be coupled directly or indirectly to the desired component of the assay according to methods well known in the art.
  • a wide variety of labels may be used.
  • the component may be labelled by any one of several methods. The most common method of detection is the use of autoradiography with 3 H, 125 1, 35 S, 14 C, or 32 P labelled compounds or the like.
  • Non-radioactive labels include ligands which bind to labelled antibodies, fluorophores, chemiluminescent agents, enzymes and antibodies which can serve as specific binding pair members for a labelled ligand.
  • the choice of label depends on sensitivity required, ease of conjugation with the compound, stability requirements, and available instrumentation.
  • EAE experimental autoimmune encephalomyelitis
  • Compounds having the desired biological activity may be modified as necessary to provide desired properties such as improved pharmacological properties (e.g. , in vivo stability, bio-availability), or the ability to be detected in diagnostic applications.
  • desired properties such as improved pharmacological properties (e.g. , in vivo stability, bio-availability), or the ability to be detected in diagnostic applications.
  • inclusion of one or more D-amino acids in the sulfonamides of this invention typically increases in vivo stability. Stability can be assayed in a variety of ways such as by measuring the half-life of the proteins during incubation with peptidases or human plasma or serum. A number of such protein stability assays have been described (see, e.g., Verhoef, et al., Eur. J. Drug Metab. Pharmacokinet., 1990, 15 2):83-93).
  • the compounds of the subject invention may be modified in a variety of ways for a variety of end purposes while still retaining biological activity.
  • various reactive sites may be introduced at the terminus for linking to particles, solid substrates, macromolecules, or the like.
  • Labeled compounds can be used in a variety of in vivo or in vitro applications.
  • a wide variety of labels may be employed, such as radionuclides (e.g., gamma-emitting radioisotopes such as technetium-99 or indium-Ill), fluorescers (e.g., fluorescein), enzymes, enzyme substrates, enzyme cofactors, enzyme inhibitors, chemiluminescent compounds, bioluminescent compounds, and the like.
  • radionuclides e.g., gamma-emitting radioisotopes such as technetium-99 or indium-Ill
  • fluorescers e.g., fluorescein
  • enzymes enzyme substrates
  • enzyme cofactors enzyme inhibitors
  • chemiluminescent compounds chemiluminescent compounds
  • bioluminescent compounds bioluminescent compounds
  • In vitro uses include diagnostic applications such as monitoring inflammatory responses by detecting the presence of leukocytes expressing VLA-4.
  • the compounds of this invention can also be used for isolating or labeling such cells.
  • the compounds of the invention can be used to assay for potential inhibitors of VLA-4/VCAM-1 interactions.
  • radioisotopes are typically used in accordance with well known techniques.
  • the radioisotopes may be bound to the peptide either directly or indirectly using intermediate functional groups.
  • chelating agents such as diethylenetriaminepentacetic acid (DTP A) and ethylenediaminetetraacetic acid (EDTA) and similar molecules have been used to bind proteins to metallic ion radioisotopes.
  • the complexes can also be labeled with a paramagnetic isotope for purposes of in vivo diagnosis, as in magnetic resonance imaging (MRI) or electron spin resonance (ESR), both of which were well known.
  • MRI magnetic resonance imaging
  • ESR electron spin resonance
  • any conventional method for visualizing diagnostic imaging can be used.
  • gamma- and positron-emitting radioisotopes are used for camera imaging and paramagnetic isotopes are used for MRI.
  • the compounds can be used to monitor the course of amelioration of an inflammatory response in an individual. By measuring the increase or decrease in lymphocytes expressing VLA-4 it is possible to determine whether a particular therapeutic regimen aimed at ameliorating the disease is effective.
  • compositions of the present invention can be used to block or inhibit cellular adhesion associated with a number of diseases and disorders.
  • a number of inflammatory disorders are associated with integrins or leukocytes.
  • Treatable disorders include, e.g., transplantation rejection (e.g.
  • the pharmaceutical compositions are used to treat inflammatory brain disorders, such as multiple sclerosis (MS), viral meningitis and encephalitis.
  • MS multiple sclerosis
  • encephalitis inflammatory brain disorders
  • Inflammatory bowel disease is a collective term for two similar diseases referred to as Crohn' s disease and ulcerative colitis.
  • Crohn' s disease is an idiopathic, chronic ulceroconstrictive inflammatory disease characterized by sharply delimited and typically transmural involvement of all layers of the bowel wall by a granulomatous inflammatory reaction. Any segment of the gastrointestinal tract, from the mouth to the anus, may be involved, although the disease most commonly affects the terminal ileum and/or colon.
  • Ulcerative colitis is an inflammatory response limited largely to the colonic mucosa and submucosa. Lymphocytes and macrophages are numerous in lesions of inflammatory bowel disease and may contribute to inflammatory injury.
  • Asthma is a disease characterized by increased responsiveness of the tracheobronchial tree to various stimuli potentiating paroxysmal constriction of the bronchial airways.
  • the stimuli cause release of various mediators of inflammation from IgE-coated mast cells including histamine, eosinophilic and neutrophilic chemotactic factors, leukotrines, prostaglandin and platelet activating factor. Release of these factors recruits basophils, eosinophils and neutrophils, which cause inflammatory injury.
  • Atherosclerosis is a disease of arteries (e.g., coronary, carotid, aorta and iliac).
  • the basic lesion, the atheroma consists of a raised focal plaque within the intima, having a core of lipid and a covering fibrous cap.
  • Atheromas compromise arterial blood flow and weaken affected arteries.
  • Macrophages and leukocytes are recruited to atheromas and contribute to inflammatory injury.
  • Rheumatoid arthritis is a chronic, relapsing inflammatory disease that primarily causes impairment and destruction of joints. Rheumatoid arthritis usually first affects the small joints of the hands and feet but then may involve the wrists, elbows, ankles and knees. The arthritis results from interaction of synovial cells with leukocytes that infiltrate from the circulation into the synovial lining of the joints. See e.g., Paul, Immunology (3d ed., Raven Press, 1993).
  • Another indication for the compounds of this invention is in treatment of organ or graft rejection mediated by VLA-4.
  • organs such as skin, kidney, liver, heart, lung, pancreas and bone marrow.
  • the principal outstanding problem is the lack of satisfactory agents for inducing immunotolerance in the recipient to the transplanted allograft or organ.
  • the host immune system is likely to mount an immune response to foreign antigens in the transplant (host-versus-graft disease) leading to destruction of the transplanted tissue.
  • CD8 + cells, CD4 cells and monocytes are all involved in the rejection of transplant tissues.
  • Compounds of this invention which bind to alpha-4 integrin are useful, inter alia, to block alloantigen-induced immune responses in the donee thereby preventing such cells from participating in the destruction of the transplanted tissue or organ. See, e.g., Paul et al. , Transplant International 9, 420-425 (1996); Georczynski et al. , Immunology 87, 573-580 (1996); Georcyznski et al. , Transplant. Immunol. 3, 55-61 (1995); Yang et al., Transplantation 60, 71-76 (1995); Anderson et al., APMIS 102, 23-27 (1994).
  • GVHD graft versus host disease
  • Tissues of the skin, gut epithelia and liver are frequent targets and may be destroyed during the course of GVHD.
  • the disease presents an especially severe problem when immune tissue is being transplanted, such as in bone marrow transplantation; but less severe GVHD has also been reported in other cases as well, including heart and liver transplants.
  • the therapeutic agents of the present invention are used, inter alia, to block activation of the donor T-cells thereby interfering with their ability to lyse target cells in the host.
  • a further use of the compounds of this invention is inhibiting tumor metastasis.
  • Several tumor cells have been reported to express VLA-4 and compounds which bind VLA-4 block adhesion of such cells to endothelial cells. Steinback et al., Urol. Res. 23, 175-83 (1995); Orosz et al., Int. J. Cancer 60, 867-71 (1995); Freedman et al. , Leuk. Lymphoma 13, 47-52
  • a further use of the compounds of this invention is in treating multiple sclerosis.
  • Multiple sclerosis is a progressive neurological autoimmune disease that affects an estimated 250,000 to 350,000 people in the United States. Multiple sclerosis is thought to be the result of a specific autoimmune reaction in which certain leukocytes attack and initiate the destruction of myelin, the insulating sheath covering nerve fibers.
  • murine monoclonal antibodies directed against VLA-4 have been shown to block the adhesion of leukocytes to the endothelium, and thus prevent inflammation of the central nervous system and subsequent paralysis in the animals 16 .
  • compositions of the invention are suitable for use in a variety of drug delivery systems. Suitable formulations for use in the present invention are found in Remington 's Pharmaceutical Sciences, Mace Publishing Company, Philadelphia, PA, 17th ed. (1985).
  • the compounds may be encapsulated, introduced into the lumen of liposomes, prepared as a colloid, or other conventional techniques may be employed which provide an extended serum half-life of the compounds.
  • a variety of methods are available for preparing liposomes, as described in, e.g., Szoka, et al., U.S. Patent Nos. 4,235,871, 4,501,728 and 4,837,028 each of which is incorporated herein by reference.
  • the amount administered to the patient will vary depending upon what is being administered, the purpose of the administration, such as prophylaxis or therapy, the state of the patient, the manner of administration, and the like.
  • compositions are administered to a patient already suffering from a disease in an amount sufficient to cure or at least partially arrest the symptoms of the disease and its complications.
  • An amount adequate to accomplish this is defined as “therapeutically effective dose. " Amounts effective for this use will depend on the disease condition being treated as well as by the judgment of the attending clinician depending upon factors such as the severity of the inflammation, the age, weight and general condition of the patient, and the like.
  • compositions administered to a patient are in the form of pharmaceutical compositions described above. These compositions may be sterilized by conventional sterilization techniques, or may be sterile filtered.
  • the resulting aqueous solutions may be packaged for use as is, or lyophilized, the lyophilized preparation being combined with a sterile aqueous carrier prior to administration.
  • the pH of the compound preparations typically will be between 3 and 11 , more preferably from 5 to 9 and most preferably from 7 to 8. It will be understood that use of certain of the foregoing excipients, carriers, or stabilizers will result in the formation of pharmaceutical salts.
  • the therapeutic dosage of the compounds of the present invention will vary according to, for example, the particular use for which the treatment is made, the manner of administration of the compound, the health and condition of the patient, and the judgment of the prescribing physician.
  • the dose will typically be in the range of about 20 ⁇ g to about 500 ⁇ g per kilogram body weight, preferably about 100 ⁇ g to about 300 ⁇ g per kilogram body weight.
  • Suitable dosage ranges for intranasal administration are generally about 0.1 pg to 1 mg per kilogram body weight.
  • Effective doses can be extrapolated from dose-response curves derived from in vitro or animal model test systems.
  • NaHCO 3 sodium bicarbonate
  • N-Tosylation of the appropriate amino acid was conducted via the method of Cupps, Boutin and Rapoport J. Org. Chem. 1985, 50, 3972.
  • the desired dipeptide ester was prepared by the reaction of a suitable ⁇ - protected amino acid (1 equivalent) with the appropriate amino acid ester or amino acid ester hydrochloride (1 equivalent), benzotriazol-1-yloxy- tris(dimethylamino)phosphonium hexafluorophosphate [BOP] (2.0 equivalent), triethylamine (1.1 equivalent), and DMF.
  • BOP benzotriazol-1-yloxy- tris(dimethylamino)phosphonium hexafluorophosphate
  • BOP triethylamine
  • the aqueous phase was made acidic with 0.2 N HC1 and the product was extracted with EtOAc.
  • the combined organic phase was washed with brine (1 x 5 mL), dried (MgSO 4 or Na 2 SO 4 ), filtered and concentrated to yield the acid as approximately a 1 : 1 mixmre of diastereomers.
  • N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to ⁇ -tert-butyl L- aspartic acid methyl ester hydrochloride using the procedure described in
  • N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to L-asparagine tert-butyl ester hydrochloride using the procedure described in Method 3.
  • ⁇ MR data was as follows:
  • N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to Ne-Boc-lysine methyl ester hydrochloride using the procedure described in Method 3.
  • the title compound was prepared via hydrolysis of the methyl ester using LiOH in THF/ water.
  • N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to ⁇ -tert-butyl L- glutamic acid methyl ester hydrochloride using the procedure described in Method 3.
  • N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to L-glutamine tert-butyl ester hydrochloride using the procedure described in Method 3.
  • N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to Ne-Cbz-L- lysine methyl ester hydrochloride using the procedure described in Method 3.
  • the title compound was prepared via hydrolysis of the methyl ester using LiOH in THF/water.
  • N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to (9-benzylserine methyl ester hydrochloride using the procedure described in Method 3.
  • the title compound was prepared via hydrolysis of the methyl ester using LiOH in THF/water.
  • N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to ⁇ - cyclohexylalanine methyl ester hydrochloride using the procedure described in Method 3.
  • the title compound was prepared via hydrolysis of the methyl ester using LiOH in THF/water.
  • ⁇ MR data was as follows:
  • N-Benzyloxycarbonyl-D-aspartic acid 4-tert-butyl ester was converted to the methyl ester using the procedure described in Method 2.
  • ⁇ -tert-Butyl-D- aspartic methyl ester was prepared from the product of the previous step utilizing the procedure described in Method 4.
  • N-(Toluene-4-sulfonyl)-L- proline hydrate was coupled to the resulting ⁇ -tert-Butyl-D-aspartic methyl ester utilizing the procedure described in Method 3.
  • the title compound was prepared via hydrolysis of the methyl ester using the procedure described in Method 6.
  • ⁇ MR data was as follows:
  • N-(Toluene-4-sulfonyl)sarcosyl- ⁇ -(pyrid-4-yl)-D,L-alanine methyl ester was employed in this reaction and was prepared as follows. Sodium metal (2 eq.) was dissolved in EtOH containing diethyl acetamidomalonate (1 eq.) and
  • N-(Toluene-4-sulfonyl)sarcosine was coupled to 3-(4-pyridyl)alanine methyl ester dihydrochloride using the procedure described in Method 3 to give N-(toluene-4-sulfonyl)sarcosyl- ⁇ -(4-pyridyl)alanine.
  • N-(Toluene-4-sulfonyl)sarcosyl-D,L- ⁇ -(4-pyridyl)alanine methyl ester (266 mg, 0.656 mmol) was dissolved in methanol (6 mL) and 12 ⁇ HCl (273 ⁇ L) and PtO 2 (25 mg) were added. The mixmre was hydrogenated at 40 psi
  • Triethylamine (56 ⁇ L), benzaldehyde (53 mg, 0.502 mmol) and 1.0 M ⁇ aBH 3 C ⁇ in THF (400 ⁇ L) were added and the mixmre was stirred for 5 hr.
  • IN HCl (3 mL) was added and the mixmre was stirred for 5 minutes before diluting with samrated aqueous NaHCO 3 (30 mL).
  • the mixmre was extracted with EtOAc (3 x 25 mL) and the combined extracts were dried
  • N-(Toluene-4-sulfonyl)sarcosyl- ⁇ -(4-piperidinyl)-D,L-alanine methyl ester hydrochloride (see Preparative Example C (109) above) (0.257 mmol) was dissolved in CHC1 3 (3 mL). Triethylamine (43 ⁇ L) and di-tert-butyl dicarbonate (67 mg, 0.309 mmol) were added and the mixmre was stirred for 1 hr. The mixmre was diluted with samrated aqueous ⁇ aHCOj (20 mL) and extracted with CHC1 3 (2 x 20 mL).
  • N-(Toluene-4-sulfonyl)sarcosyl- ⁇ -(piperidin-4-yl)-D,L-alanine methyl ester hydrochloride (see Preparative Example C (109)) (65 mg, 0.15 mmol) was dissolved in CHC1 3 (3 mL) and cooled in an ice bath. Triethylamine (61 ⁇ L) and benzoyl chloride (21 mg, 0.15 mmol) were added and the mixmre was stirred for 1 hr. The mixmre was diluted with IN HCl (20 mL) and extracted with EtOAc (2 x 25 mL).
  • N-(Toluene-4-sulfonyl)sarcosine was coupled to N ⁇ -Boc-L-lysine methyl ester hydrochloride using the procedure described in Method 3 to give N-
  • N-(Toluene-4-sulfonyl)-L-prolyl- ⁇ -hydroxy-D,L-phenylalanine methyl ester (501 mg, 1.12 mmol) was dissolved in CH 2 C1 2 (10 mL) and cooled in an ice bath. Triethylamine (195 ⁇ L) was added, followed by methanesulfonyl chloride (135 mg, 1.13 mmol). The mixmre was stirred was stirred for 45 minutes before additional triethylamine (313 ⁇ L) was added. The mixmre was warmed to room temperamre and stirred for 3 hr.
  • the product was prepared from suitable starting materials via Method 3 and Method 11 and was isolated as a solid.
  • An in vitro assay was used to assess binding of candidate compounds to ⁇ 4 ⁇ ! integrin.
  • Compounds which bind in this assay can be used to assess VCAM-1 levels in biological samples by conventional assays (e.g., competitive assays). This assay is sensitive to I Q values as low as about InM.
  • the activity of a 4 p, integrin was measured by the interaction of soluble VCAM-1 with Jurkat cells (e.g. , American Type Culture Collection Nos. TIB 152, TIB 153, and CRL 8163), a human T-cell line which expresses high levels of ⁇ 4 ⁇ , integrin.
  • VCAM-1 interacts with the cell surface in an ⁇ 4 ⁇ j integrin-dependent fashion (Yednock, et al. J. Biol. Chem., 1995,
  • VCAM-1 fusion protein containing the seven extracellular domains of VCAM-1 on the N- terminus and the human IgG, heavy chain constant region on the C-terminus.
  • the VCAM-1 fusion protein was made and purified by the manner described by Yednock, supra.
  • Jurkat cells were grown in RPMI 1640 supplemented with 10% fetal bovine serum, penicillin, streptomycin and glutamine as described by Yednock, supra.
  • each of the compounds in Examples 1-78 has an IC 50 of 15 ⁇ M or less.
  • EAE Experimental Autoimmune Encephalomyelitis
  • Log-growth Jurkat cells are washed and resuspended in normal animal plasma containing 20 ⁇ g/ml of the 15/7 antibody (described in the above example).
  • the Jurkat cells are diluted two-fold into either normal plasma samples containing known candidate compound amounts in various concentrations ranging from 66 ⁇ M to 0.01 ⁇ M, using a standard 12 point serial dilution for a standard curve, or into plasma samples obtained from the peripheral blood of candidate compound-treated animals.
  • PBS phosphate-buffered saline
  • ImM calcium chloride and magnesium chloride
  • the cells are then exposed to phycoerythrin-conjugated goat F(ab' 2 anti- mouse IgG Fc (Immunotech, Westbrook, ME), which has been adsorbed for any non-specific cross-reactivity by co-incubation with 5 % serum from the animal species being studied, at 1:200 and incubated in the dark at 4°C for 30 minutes.
  • F(ab' 2 anti- mouse IgG Fc immunotech, Westbrook, ME
  • FACS fluorescence activated cell sorter
  • This assay may also be used to determine the plasma levels needed to saturate the binding sites of other integrins, such as the g ⁇ , integrin, which is the integrin most closely related 4 ⁇ ; (Palmer et al, 1993, J. Cell Bio., 123: 1289). Such binding is predictive of in vivo utility for inflammatory conditions mediated by ⁇ 9 ⁇ ].
  • integrin including by way of example, airway hyper-responsiveness and occlusion that occurs with chronic asthma, smooth muscle cell proliferation in atherosclerosis, vascular occlusion following angioplasty, fibrosis and glomerular scarring as a result of renal disease, aortic stenosis, hypertrophy of synovial membranes in rheumatoid arthritis, and inflammation and scarring that occur with the progression of ulcerative colitis and Crohn' s disease.
  • the above-described assay may be performed with a human colon carcinoma cell line, SW 480 (ATTC #CCL228) transfected with cDNA encoding 9 integrin (Yokosaki et al., 1994, J. Biol. Chem., 269:26691), in place of the Jurkat cells, to measure the binding of the c l integrin.
  • SW 480 cells which express other ⁇ and p subunits may be used.
  • another aspect of this invention is directed to a method for treating a disease in a mammalian patient, which disease is mediated by c , , and which method comprises administering to said patient a therapeutically effective amount of a compound of this invention.
  • Such compounds are preferably administered in a pharmaceutical composition described herein above. Effective daily dosing will depend upon the age, weight, condition of the patient which factors can be readily ascertained by the attending clinician. However, in a preferred embodiment, the compounds are administered from about 20 to 500 ⁇ g/kg per day.
  • EAE Experimental Autoimmune (or Allergic) Encephalomyelitis
  • Brains and spinal cords of adult Hartley guinea pigs are homogenized in an equal volume of phosphate-buffered saline.
  • An equal volume of Freund's complete adjuvant (100 mg mycobacterium tuberculosis plus 10 ml Freund's incomplete adjuvant) is added to the homogenate.
  • the mixmre is emulsified by circulating it repeatedly through a 20 ml syringe with a peristaltic pump for about 20 minutes.
  • mice Female Lewis rats (2-3 months old, 170-220 g) or Hartley guinea pigs (20 day old, 180-200 g) are anesthetized with isoflurane and three injections of the emulsion, 0.1 ml each, are made in each flank. Motor impairment onset is seen in approximately 9 days.
  • Candidate compound treatment begins on Day 8, just before onset of symptoms.
  • Compounds are administered subcutaneously ("SC"), orally ("PO") or intraperitoneally ("IP"). Doses are given in a range of lOmg/kg to 200 mg/kg, bid, for five days, with typical dosing of 10 to 100 mg/kg SC, 10 to 50 mg/kg PO, and 10 to 100 mg/kg IP.
  • Antibody GG5/3 against ⁇ 4 ⁇ j integrin (Keszthelyi et al. , Neurology, 1996, 47: 1053-1059), which delays the onset of symptoms, is used as a positive control and is injected subcutaneously at 3 mg/kg on Day 8 and 11.
  • Body weight and motor impairment are measured daily. Motor impairment is rated with the following clinical score:
  • a candidate compound is considered active if it delays the onset of symptoms, e.g. , produces clinical scores no greater than 2 or slows body weight loss as compared to the control.
  • Inflammatory conditions mediated by ⁇ 4 ⁇ , integrin include, for example, airway hyper-responsiveness and occlusion that occurs with chronic asthma.
  • the following describes an asthma model which can be used to s dy the in vivo effects of the compounds of this invention for use in treating asthma.
  • compounds of this invention are formulated into an aerosol and administered to sheep which are hypersensitive to Ascaris suum antigen.
  • Compounds which decrease the early antigen-induced bronchial response and/or block the late -phase airway response e.g., have a protective effect against antigen-induced late responses and airway hyper-responsiveness (“AHR"), are considered to be active in this model.
  • Allergic sheep which are shown to develop both early and late bronchial responses to inhaled Ascaris suum antigen are used to smdy the airway effects of the candidate compounds.
  • a balloon catheter is advanced through one nostril into the lower esophagus.
  • the animals are then intubated with a cuffed endotracheal tube through the other nostril with a flexible fiberoptic bronchoscope as a guide.
  • Pleural pressure is estimated according to Abraham (1994). Aerosols (see formulation below) are generated using a disposable medical nebulizer that provides an aerosol with a mass median aerodynamic diameter of 3.2 ⁇ m as determined with an Andersen cascade impactor.
  • the nebulizer is connected to a dosimeter system consisting of a solenoid valve and a source of compressed air (20 psi).
  • the output of the nebulizer is directed into a plastic T-piece, one end of which is connected to the inspiratory port of a piston respirator.
  • the solenoid valve is activated for 1 second at the beginning of the inspiratory cycle of the respirator. Aerosols are delivered at V ⁇ of 500 ml and a rate of 20 breaths/minute. A 0.5% sodium bicarbonate solution only is used as a control.
  • Bronchial biopsies can be taken prior to and following the initiation of treatment and 24 hours after antigen challenge. Bronchial biopsies can be preformed according to Abraham (1994). An in vitro adhesion smdy of alveolar macrophages can be performed according to Abraham (1994), and a percentage of adherent cells is calculated.
  • a solution of the candidate compound in 0.5% sodium bicarbonate/saline (w/v) at a concentration of 30.0 mg/mL is prepared using the following procedure:

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Abstract

Disclosed are compounds which bind VLA-4. Certain of these compounds also inhibit leukocyte adhesion and, in particular, leukocyte adhesion mediated by VLA-4. Such compounds are useful in the treatment of inflammatory diseases in a mammalian patient, e.g., human, such as asthma, Alzheimer's disease, atherosclerosis, AIDS dementia, diabetes, inflammatory bowel disease, rheumatoid arthritis, tissue transplantation, tumor metastasis and myocardial ischemia. The compounds can also be administered for the treatment of inflammatory brains diseases such as multiple sclerosis.

Description

DIPEPTIDE AND RELATED COMPOUNDS WHICH INHIBIT LEUKOCYTE ADHESION MEDIATED BY VLA-4
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims the benefit of U.S. Provisional Application
No. 60/ , , which was converted pursuant to 37 C.F.R. § 1.53(c)(2)(f) from U.S. Patent Application No.08/904,417, filed July 31, 1997, the disclosure of which is incorporated herein by reference in its entirety.
BACKGROUND OF THE INVENTION
Field of the Invention
This invention relates to compounds which inhibit leukocyte adhesion and, in particular, leukocyte adhesion mediated by VLA-4.
References
The following publications, patents and patent applications are cited in this application as superscript numbers:
1 Hemler and Takada, European Patent Application Publication No. 330,506, published August 30, 1989
2 Elices, et al. , Cell, 60:577-584 (1990)
3 Springer, Nature, 346:425-434 (1990)
4 Osborn, Cell, 62:3-6 (1990)
5 Vedder, et al. , Surgery, 106:509 (1989)
6 Pretolani, et al., J. Exp. Med. , 180:795 (1994)
7 Abraham, et al., J. Clin. Invest. , 93:776 (1994) Mulligan, et al. , J. Immunology, 150:2407 (1993)
Cybulsky, et al. , Science, 251:788 (1991)
10 Li, et al., Arterioscler. Thromb. , 13:197 (1993)
11 Sasseville, et al., Am. J. Path. , 144:27 (1994)
12 Yang, et al., Proc. Nat. Acad. Science (USA), 90: 10494 (1993)
13 Burkly, et al. , Diabetes, 43:529 (1994)
14 Baron, et al., J. Clin. Invest. , 93: 1700 (1994)
15 Hamann, et al., J. Immunology, 152:3238 (1994)
16 Yednock, et al., Nature, 356:63 (1992)
π Baron, et al. , J. Exp. Med. , 177:57 (1993)
18 van Dinther-Janssen, et al., J. Immunology , 147:4207 (1991)
19 van Dinther-Janssen, et al. , Annals. Rheumatic Dis. , 52:672 (1993)
20 Elices, et al., J. Clin. Invest. , 93:405 (1994)
21 Postigo, et al., J. Clin. Invest. , 89:1445 (1991)
22 Paul, et al., Transpl. Proceed. , 25:813 (1993)
23 Okarhara, et al., Can. Res. , 54:3233 (1994)
24 Paavonen, et al., Int. J. Can. , 58:298 (1994)
25 Schadendorf, et al. , J. Path. , 170:429 (1993)
26 Bao, et al. , Diff. , 52:239 (1993)
21 Lauri, et al., British J. Cancer, 68:862 (1993)
28 Kawaguchi, et al., Japanese J. Cancer Res. , £3:1304 (1992) 29 Kogan, et al., U.S. Patent No. 5,510,332, issued April 23, 1996
30 International Patent Appl. Publication No. WO 96/01644
All of the above publications, patents and patent applications are herein incorporated by reference in their entirety to the same extent as if each individual publication, patent or patent application was specifically and individually indicated to be incorporated by reference in its entirety.
State of the Art
VLA-4 (also referred to as α4βl integrin and CD49d/CD29), first identified by Hemler and Takada1 is a member of the β 1 integrin family of cell surface receptors, each of which comprises two subunits, an α chain and a β chain. VLA-4 contains an α4 chain and a βl chain. There are at least nine βl integrins, all sharing the same βl chain and each having a distinct chain. These nine receptors all bind a different complement of the various cell matrix molecules, such as fϊbronectin, laminin, and collagen. VLA-4, for example, binds to fibronectin. VLA-4 is unique among βj integrins in that it also binds non-matrix molecules that are expressed by endothelial and other cells. These non-matrix molecules include VCAM-1, which is expressed on cytokine-activated human umbilical vein endothelial cells in culture. Distinct epitopes of VLA-4 are responsible for the fibronectin and VCAM-1 binding activities and each activity has been shown to be inhibited independently .2
Intercellular adhesion mediated by VLA-4 and other cell surface receptors is associated with a number of inflammatory responses. At the site of an injury or other inflammatory stimulus, activated vascular endothelial cells express molecules that are adhesive for leukocytes. The mechanics of leukocyte adhesion to endothelial cells involves, in part, the recognition and binding of cell surface receptors on leukocytes to the corresponding cell surface molecules on endothelial cells. Once bound, the leukocytes migrate across the blood vessel wall to enter the injured site and release chemical mediators to combat infection. For reviews of adhesion receptors of the immune system, see, for example, Springer3 and Osborn4.
Inflammatory brain disorders, such as experimental autoimmune encephalomyelitis (EAE), multiple sclerosis (MS) and meningitis, are examples of central nervous system disorders in which the endothelium/leukocyte adhesion mechanism results in destruction to otherwise healthy brain tissue. Large numbers of leukocytes migrate across the blood brain barrier (BBB) in subjects with these inflammatory diseases. The leukocytes release toxic mediators that cause extensive tissue damage resulting in impaired nerve conduction and paralysis.
In other organ systems, tissue damage also occurs via an adhesion mechanism resulting in migration or activation of leukocytes. For example, it has been shown that the initial insult following myocardial ischemia to heart tissue can be further complicated by leukocyte entry to the injured tissue causing still further insult (Vedder et al.5). Other inflammatory conditions mediated by an adhesion mechanism include, by way of example, asthma6"8, Alzheimer's disease, atherosclerosis9 10, AIDS dementia11, diabetes12 14 (including acute juvenile onset diabetis), inflammatory bowel disease15 (including ulcerative colitis and Crohn's disease), multiple sclerosis16"17, rheumatoid arthritis18"21, tissue transplantation22, tumor metastasis23"28, meningitis, encephalitis, stroke, and other cerebral traumas, nephritis, retinitis, atopic dermatitis, psoriasis, myocardial ischemia and acute leukocyte-mediated lung injury such as that which occurs in adult respiratory distress syndrome. In view of the above, assays for determining the level VLA-4 in a biological sample containing VLA-4 would be useful, for example, to diagnosis VLA-4 mediated conditions. Additionally, despite these advances in the understanding of leukocyte adhesion, the art has only recently addressed the use of inhibitors of adhesion in the treatment of inflammatory brain diseases and other inflammatory conditions29 30. The present invention addresses these and other needs.
SUMMARY OF THE INVENTION This invention provides compounds which bind to VLA-4. Such compounds can be used, for example, to assay for the presence of VLA-4 in a sample and, in pharmaceutical compositions to inhibit cellular adhesion mediated by VLA-4, for example, binding of VCAM-1 to VLA-4. The compounds of this invention have a binding affinity to VLA-4 as expressed by an IC50 of about 15 μM or less (as measured by Example 79 below) which compounds are defined by formula I below:
R3 O
I II R1-SO2-N(R2)-C-Q-CH-C-OH I
H R 5
where
R1 is selected from the group consisting of alkyl, substituted alkyl, aryl, substituted aryl, cycloalkyl, substituted cycloalkyl, heterocyclic, substituted heterocylic, heteroaryl and substituted heteroaryl;
R2 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, cycloalkenyl, substituted cycloalkenyl, heterocyclic, substimted heterocyclic, aryl, substituted aryl, heteroaryl, substituted heteroaryl, and R1 and R2 together with the nitrogen atom bound to R2 and the SO2 group bound to R1 can form a heterocyclic or a substimted heterocyclic group;
R3 is selected from the group consisting of hydrogen, alkyl, substimted alkyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic and, when R2 does not form a heterocyclic group with R1 , R2 and R3 together with the nitrogen atom bound to R2 and the carbon atom bound to R3 can form a heterocyclic or a substimted heterocyclic group;
R5 is -ALK-X or =CH-Y where ALK is an alkyl group of from 1 to 10 carbon atoms attached via a methylene group (-CH2-) to the carbon atom to which it is attached; X is selected from the group consisting of substimted alkylcarbonylamino, substimted alkenylcarbonylamino, substimted alkynylcarbonylamino, heterocyclylcarbonylamino, substimted heterocyclylcarbonylamino, acyl, acyloxy, aminocarbonyloxy, acylamino, oxycarbonylamino, alkoxycarbonyl, substimted alkoxycarbonyl, aryloxycarbonyl, substimted aryloxycarbonyl, cycloalkoxycarbonyl, substimted cycloalkoxycarbonyl, heteroaryloxycarbonyl, substimted heteroaryloxycarbonyl, heterocyclyloxycarbonyl, substituted heterocyclyloxycarbonyl, cycloalkyl, substimted cycloalkyl, saturated heterocyclic, substimted saturated heterocyclic, substimted alkoxy, substimted alkenoxy, substimted alkynoxy, heterocyclyloxy, substimted heterocycloxy, substimted thioalkyl, substimted thioalkenyl, substituted thioalkynyl, aminocarbonylamino, aminothiocarbonylamino, guanidino, amidino, alkylamidino, thioamidino, halogen, cyano, nitro, -OS(O)2-alkyl, -OS(O)2-substituted alkyl, -OS(O)2-cycloalkyl, -OS(O)2-substituted cycloalkyl, -OS(O)2-aryl, -OS(O)2-substituted aryl, -OS(O)2-heteroaryl, -OS(O)2-substituted heteroaryl, -OS(O)2-heterocyclic, -OS(O)2-substimted heterocyclic, -OSO2-NRR where R is hydrogen or alkyl, -NRS(O)2-alkyl, -NRS(O)2-substituted alkyl, -NRS(O)2-cycloalkyl, -NRS(O)2-substimted cycloalkyl, -NRS(O)2-aryl, -NRS(O)2-substimted aryl, -NRS(O)2-heteroaryl, -NRS(O)2-substimted heteroaryl, -NRS(O)2-heterocyclic, -NRS(O)2- substimted heterocyclic, -NRS(O)2-NR-alkyl, -NRS(O)2-NR-substimted alkyl, -NRS(O)2-NR-cycloalkyl, -NRS(O)2-NR-substimted cycloalkyl, -NRS(O)2-NR-aryl, -NRS(O)2-NR-substimted aryl, -NRS(O)2-NR-heteroaryl, -NRS(O)2-NR-substituted heteroaryl, -NRS(O)2-NR-heterocyclic, -NRS(O)2-
NR-substituted heterocyclic where R is hydrogen or alkyl, -S^ alkyl, - S(O)2-substimted alkyl, -S(O)2-aryl,
-S(O)2-substituted aryl, -S(O)2-substituted heteroaryl, -S(O)2-substimted heteroaryl, -S(O)2-heterocyclic, -S(O)2-substituted heterocyclic, mono- and di-(substituted alkyl)amino, N,N-(alkyl, substimted alkyl)amino, N,N-(aryl, substimted alkyl)amino, N,N-(substimted aryl, substimted alkyl)amino, N,N- (heteroaryl, substimted alkyl)amino, N,N-(substimted heteroaryl, substimted alkyl)amino, N,N-(heterocyclic, substimted alkyl)amino, N,N-N,N- (substimted heterocyclic, substimted alkyl)amino, mono- and di- (heterocyclic)amino, mono- and di-(substituted heterocyclic)amino, N,N-
(alkyl, heterocyclic)amino, N,N-(alkyl, substimted heterocyclic)amino, N,N- (aryl, heterocyclic)amino, N,N-(substimted aryl, heterocyclic)amino, N,N- (aryl, substimted heterocyclic)amino, N,N-(substimted aryl, substimted heterocyclic)amino, N,N-(heteroaryl, heterocyclic)amino, N,N-(heteroaryl, substimted heterocyclic)amino, N,N-(substimted heteroaryl, heterocyclic)amino, and N,N-(substimted heteroaryl, substimted heterocyclic)amino; and Y is selected from the group consisting of alkyl, substimted alkyl, aryl, substituted aryl, cycloalkyl, substimted cycloalkyl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic; Q is -C(X)NR7- wherein R7 is selected from the group consisting of hydrogen and alkyl; and X is selected from the group consisting of oxygen and sulfur; and pharmaceutically acceptable salts thereof with the provisos that A. when R1 is -methylphenyl, R2 and R3 are joined together with the nitrogen atom bound to R2 and the carbon atom bound to R3 to form a pyrrolidinyl ring and Q is -C(O)NH-, then R5 is not -CH2C(O)-O-t-butyl or - CH2CH2C(O)-O-t-butyl; and B. when R1 is />-methylphenyl, R2 is methyl, R3 is hydrogen and
Q is -C(O)NH-, then R5 is not -CH2(N-benzylpiperin-4-yl).
In another embodiment, the compounds of this invention can also be provided as prodrugs which convert (e.g. , hydrolyze, metabolize, etc.) in vivo to a compound of formula I above. In a preferred example of such an embodiment, the carboxylic acid of the compound of formula I is modified into a group which, in vivo, will convert to a carboxylic acid (including salts thereof). In a particularly preferred embodiment, such prodrugs are represented by compounds of formula IA:
R3 O
I II
R1-SO2-N(R2)-C-Q-CH-C-R6 IA
H R5
where
R1 is selected from the group consisting of alkyl, substimted alkyl, aryl, substimted aryl, cycloalkyl, substimted cycloalkyl, heterocyclic, substituted heterocylic, heteroaryl and substimted heteroaryl;
R2 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, cycloalkyl, substimted cycloalkyl, cycloalkenyl, substimted cycloalkenyl, heterocyclic, substimted heterocyclic, aryl, substituted aryl, heteroaryl, substituted heteroaryl, and R1 and R2 together with the nitrogen atom bound to R2 and the SO2 group bound to R1 can form a heterocyclic or a substimted heterocyclic group;
R3 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic and, when R2 does not form a heterocyclic group with R1, R2 and R3 together with the nitrogen atom bound to R2 and the carbon atom bound to R3 can form a heterocyclic or a substimted heterocyclic group; R5 is -ALK-X or =CH-Y where ALK is an alkyl group of from 1 to
10 carbon atoms attached via a methylene group (-CH2-) to the carbon atom to which it is attached; X is selected from the group consisting of substimted alkylcarbonylamino, substimted alkenylcarbonylamino, substimted alkynylcarbonylamino, heterocyclylcarbonylamino, substituted heterocyclylcarbonylamino, acyl, acyloxy, aminocarbonyloxy, acylamino, oxycarbonylamino, alkoxycarbonyl, substimted alkoxycarbonyl, aryloxycarbonyl, substimted aryloxycarbonyl, cycloalkoxycarbonyl, substimted cycloalkoxycarbonyl, heteroaryloxycarbonyl, substimted heteroaryloxycarbonyl, heterocyclyloxycarbonyl, substimted heterocyclyloxycarbonyl, cycloalkyl, substimted cycloalkyl, saturated heterocyclic, substimted saturated heterocyclic, substimted alkoxy, substimted alkenoxy, substimted alkynoxy, heterocyclyloxy, substimted heterocycloxy, substimted thioalkyl, substimted thioalkenyl, substimted thioalkynyl, aminocarbonylamino, aminothiocarbonylamino, guanidino, amidino, alkylamidino, thioamidino, halogen, cyano, nitro, -OS(O)2-alkyl,
-OS(O)2-substituted alkyl, -OS(O)2-cycloalkyl, -OS(O)2-substituted cycloalkyl, -OS(O)2-aryl, -OS(O)2-substituted aryl, -OS(O)2-heteroaryl, -OS(O)2-substituted heteroaryl, -OS(O)2-heterocyclic, -OS(O)2-substituted heterocyclic, -OSO2-NRR where R is hydrogen or alkyl, -NRS(O)2-alkyl, -NRS(O)2-substituted alkyl, -NRS(O)2-cycloalkyl, -NRS(O)2-substituted cycloalkyl, -NRS(O)2-aryl, -NRS(O)2-substituted aryl, -NRS(O)2-heteroaryl, -NRS(O)2-substituted heteroaryl, -NRS(O)2-heterocyclic, -NRS(O)2- substituted heterocyclic, -NRS(O)2-NR-alkyl, -NRS(O)2-NR-substimted alkyl, -NRS(O)2-NR-cycloalkyl, -NRS(O)2-NR-substimted cycloalkyl, -NRS(O)2-NR-aryl, -NRS(O)2-NR-substituted aryl, -NRS(O)2-NR-heteroaryl, -NRS(O)2-NR-substituted heteroaryl, -NRS(O)2-NR-heterocyclic, -NRS(O)2- NR-substimted heterocyclic where R is hydrogen or alkyl, -S(O)2-alkyl, - S(O)2-substituted alkyl, -S(O)2-aryl, -S(O)2-substimted aryl, -S(O)2-substituted heteroaryl, -S(O)2-substituted heteroaryl, -S(O)2-heterocyclic, -S(O)2-substituted heterocyclic, mono- and di-(substimted alkyl)amino, N,N-(alkyl, substimted alkyl)amino, N,N-(aryl, substimted alkyl)amino, N,N-(substimted aryl, substimted alkyl)amino, N,N- (heteroaryl, substimted alkyl)amino, N,N-(substituted heteroaryl, substimted alkyl)amino, N,N-(heterocyclic, substimted alkyl)amino, N,N-N,N-
(substimted heterocyclic, substimted alkyl)amino, mono- and di- (heterocyclic)amino, mono- and di-(substimted heterocyclic)amino, N,N- (alkyl, heterocyclic)amino, N,N-(alkyl, substimted heterocyclic)amino, N,N- (aryl, heterocyclic)amino, N,N-(substituted aryl, heterocyclic)amino, N,N- (aryl, substimted heterocyclic)amino, N,N-(substimted aryl, substituted heterocyclic)amino, N,N-(heteroaryl, heterocyclic)amino, N,N-(heteroaryl, substimted heterocyclic)amino, N,N-(substimted heteroaryl, heterocyclic)amino, and N,N-(substituted heteroaryl, substimted heterocyclic)amino; and Y is selected from the group consisting of alkyl, substimted alkyl, aryl, substituted aryl, cycloalkyl, substimted cycloalkyl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic;
R6 is selected from the group consisting of 2,4-dioxo-tetrahydrofuran- 3-yl (3,4-enol), amino, alkoxy, substimted alkoxy, cycloalkoxy, substimted cycloalkoxy, -O-(N-succinimidyl), -NH-adamantyl, -O-cholest-5-en-3-β-yl, - NHOY where Y is hydrogen, alkyl, substimted alkyl, aryl, and substimted aryl, -NH(CH2)pCOOY where /? is an integer of from 1 to 8 and Y is as defined above, -OCH2NR9R10 where R9 is selected from the group consisting of -C(O)-aryl and -C(O)-substituted aryl and R10 is selected from the group consisting of hydrogen and -CH2COORu where R11 is alkyl, and -NHSO2Z where Z is alkyl, substimted alkyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic;
Q is -C(X)NR7- wherein R7 is selected from the group consisting of hydrogen and alkyl; and X is selected from the group consisting of oxygen and sulfur; and pharmaceutically acceptable salts thereof with the proviso that
A. when R1 is -methylphenyl, R2 and R3 are joined together with the nitrogen atom bound to R2 and the carbon atom bound to R3 to form a pyrrolidinyl ring, R6 is methoxy, and Q is -C(O)NH-, then R5 is not -
CH2CH2COO-t-butyl or -CH2COO-t-butyl.
Preferably, in the compounds of formula I and I A above, R1 is selected from the group consisting of alkyl, substimted alkyl, aryl, substituted aryl, heterocyclic, substimted heterocylic, heteroaryl and substimted heteroaryl. Even more preferably R1 is selected from the group consisting of 4-methylphenyl, methyl, benzyl, n-butyl, 4-chlorophenyl, 1- naphthyl, 2-naphthyl, 4-methoxyphenyl, phenyl, 2,4,6-trimethylphenyl, 2- (methoxycarbonyl)phenyl, 2-carboxyphenyl, 3,5-dichlorophenyl, 4- trifluoromethylphenyl, 3,4-dichlorophenyl, 3,4-dimethoxyphenyl, 4- (CH3C(O)NH-)phenyl, 4-trifluoromethoxyphenyl, 4-cyanophenyl, isopropyl, 3,5-di-(trifluoromethyl)phenyl, 4-t-butylphenyl, 4-t-butoxyphenyl, 4- nitrophenyl, 2-thienyl, l-N-methyl-3-methyl-5-chloropyrazol-4-yl, phenethyl, l-N-methylimidazol-4-yl, 4-bromophenyl, 4-amidinophenyl, 4- methylamidinophenyl, 4-[CH3SC(=NH)]phenyl, 5-chloro-2-thienyl, 2,5- dichloro-4-thienyl, l-N-methyl-4-pyrazolyl, 2-thiazolyl, 5-methyl-l,3,4- thiadiazol-2-yl, 4-[H2NC(S)]phenyl, 4-aminophenyl, 4-fluorophenyl, 2- fluorophenyl, 3-fluorophenyl, 3,5-difluorophenyl, pyridin-3-yl, pyrimidin-2- yl, 4-(3Xdimethylamino- z-propoxy)-phenyl, and l-methylpyrazol-4-yl.
Preferably, in the compounds of formula I and I A above, R2 is hydrogen, methyl, phenyl, benzyl, -(CH2)2-2-thienyl, and -(CH2)2-φ.
In one embodiment, R1 and R2 together with the nitrogen atom bound to R2 and the SO2 group bound to R1 are joined to form a heterocyclic group or substimted heterocyclic group. Preferred heterocyclic and substimted heterocyclic groups include those having from 5 to 7 ring atoms having 2 to
3 heteroatoms in the ring selected from nitrogen, oxygen and sulfur which ring is optionally fused to another ring such as a phenyl or cyclohexyl ring to provide for a fused ring heterocycle of from 10 to 14 ring atoms having 2 to
4 heteroatoms in the ring selected from nitrogen, oxygen and sulfur. Specifically preferred R'/R2 joined groups include, by way of example, benzisothiazolony 1 (saccharin-2-yl) .
In one preferred embodiment, R2 and R3 together with the nitrogen atom bound to R2 substiment and the carbon bound to the R3 substiment form a heterocyclic group or a substimted heterocyclic group of 4 to 6 ring atoms having 1 to 2 heteroatoms in the ring selected from nitrogen, oxygen and sulfur which ring is optionally substimted with 1 to 2 substituents selected from fluoro, methyl, hydroxy, amino, phenyl, thiophenyl, thiobenzyl, oxo or can be fused to another ring such as a phenyl or cycloalkyl ring to provide for a fused ring heterocycle of from 10 to 14 ring atoms having 1 to 2 heteroatoms in the ring selected from nitrogen, oxygen and sulfur. Such heterocyclic rings include azetidinyl (e.g., L-azetidinyl), thiazolidinyl (e.g., L-thiazolidinyl), piperidinyl (e.g. , L-piperidinyl), piperizinyl (e.g., L- piperizinyl), dihydroindolyl (e.g., L-2,3-dihydroindol-2-yl), tetrahydroquinoliny 1 (e.g., L- 1 ,2 , 3 ,4-tetrahydroquinolin-2-yl) , thiomorpholinyl (e.g., L-thiomorpholin-3-yl), pyrrolidinyl (e.g., L- pyrrolidinyl), substimted pyrrolidinyl such as 4-hydroxypyrrolidinyl (e.g., 4- -(or β-)hydroxy-L-pyrrolidinyl), 4-fluoropyrrolidinyl (e.g., 4-α-(or β-)fluoro-L-pyrrolidinyl), 3-phenylpyrrolidinyl (e.g., 3- -(or β-)phenyl-L-pyrrolidinyl),
3-thiophenylpyrrolidinyl (e.g. , 3-α-(or β-)thiophenyl-L-pyrrolidinyl), 4-aminopyrrolidinyl (e.g., 4- -(or β-)amino-L-pyrrolidinyl), 3-methoxypyrrolidinyl (e.g. , 3-c -(or β-)methoxy-L-pyrrolidinyl), 4,4-dimethylpyrrolidinyl, substimted piperizinyl such as 4-N-Cbz- piperizinyl, 5-oxopyrrolidinyl (e.g. , 5-oxo-L-pyrolinyl), substimted thiazolidinyl such as 5,5-dimethylthiazolindin-4-yl, 1,1-dioxo-thiazolidinyl (e.g., L- 1 , 1 -dioxo-thiazolidin-2-y 1) , substimted
1,1-dioxo-thiazolidinyl such as L-l,l-dioxo-5,5-dimethylthiazolidin-2-yl, 1,1-dioxothiomorpholinyl (e.g., L-l,l-dioxo-thiomorpholin-3-yl) and the like.
Preferably, in the compounds of formula I and I A above, R3 includes all of the isomers arising by substitution with methyl, phenyl, benzyl, diphenylmethyl, -CH2CH2-COOH, -CH2-COOH, 2-amidoethyl, iso-butyl, t- butyl, -CH2O-benzyl and hydroxymethyl. Additionally, in another preferred embodiment, R3 and R2 together with the nitrogen atom bound to R2 can form a heterocyclic group or substimted heterocyclic group.
Q is preferably -C(O)NH- or -C(S)NH-.
R5 is preferably selected from all possible isomers arising by substitution with the following groups: t-butyl-OC(O)CH2-, -CH2C(O)NH2, CH2CH2C(O)NH2, t-butyl-OC(O)CH2CH2-, BocNH-(CH2)4-, (φ-CH2-OC(O)NH-(CH2)4-, benzyloxy-CH2-, cyclohexyl-CH2-,
N-benzylpiperid-4-yl-CH2- , N-Boc-piperidin-4-y 1-CH2- , N-(phenylcarbonyl)piperidin-4-yl-CH2-, allyloxy-C(O)NH-(CH2)4-, allyloxy-C(O)NH(CH2)3-, allyloxy-C(O)NH(CH2)2-, φ-CH = , 4-methylphenyl-SO2-N(CH3)CH2C(O)NH(CH2)4-, -CH2C(O)NH(CH2)4φ, -(CH2)4NHC(O)CH2-3-indolyl , -(CH2)4NHC(O)CH2CH2-3-indolyl , -(CH2)4NHC(O)CH2O-4-fluorophenyl, -CH2C(O)NHCH(CH3)φ,
-CH2C(O)NHCH2-(4-dimethylamino)-φ , -CH2C(O)NHCH2-4-nitrophenyl , -CH2CH2C(O)N(CH3)CH2-φ , -CH2C(O)N(CH3)CH2-φ , -CH2CH2C(O)NHCH2CH2-(N-methyl)-2-pyrrolyl, -CH2CH2C(O)NHCH2CH2CH2CH3 , -CH2CH2C(O)NHCH2CH2-3-indolyl , -CH2C(O)N(CH3)CH2phenyl , -CH2C(O)NH(CH2)2-(N-methyl)-2-pyrrolyl , -CH2C(O)NHCH2CH2CH2CH3 , -CH2C(O)NHCH2CH2-3-indolyl , -(CH2)2C(O)NHCH(CH3)φ, -(CH2)2C(O)NHCH2-4-dimethylaminophenyl, -(CH2)2C(O)NHCH2-4-nitrophenyl, -CH2C(O)NH-4-[-NHC(O)CH3-phenyl], -CH2C(O)NH-4-pyridyl, -CH2C(O)NH-4-[dimethylaminophenyl] , -CH2C(O)NH-3-methoxyphenyl, -CH2CH2C(O)NH-4-chlorophenyl,
-CH2CH2C(O)NH-2-pyridyl, -CH2CH2C(O)NH-4-methoxyphenyl, -CH2CH2C(O)NH-3-pyridyl , -(CH2)3NHC(NH)NH-SO2-4-methylpheny 1 , -(CH2)4NHC(O)NHCH2CH3, -(CH2)4NHC(O)NH-phenyl, -(CH2)4NHC(O)NH-4-methoxyphenyl, -CH2C(O)NHCH2CH2N(CH3)2, [BocNHCH2C(O)NH-]butyl, 2-[4-hydroxy-4-(3-methoxythien-2-yl)piperidin- l-yl]ethyl, 4-[(l-Cbz-piperidin-4-yl)C(O)NH-]butyl, 4-[(N-toluenesulfonylpyrrolidin-2Xyl)C(O)NH-]butyl, 4-[-NHC(O)-4Xpiperidinyl]butyl, N-Cbz-NHCH2-, (CH3)2NC(O)CH2-, and N-Boc-2-aminoethyl .
In the compounds of formula IA, R6 is preferably 2,4-dioxo- tetrahydrofuran-3-yl (3,4-enol), methoxy, ethoxy, zsø-propoxy, n-butoxy, t-butoxy, cyclopentoxy, neø-pentoxy, 2-α- sø-propyl-4-β- methylcyclohexoxy, 2-β-isopropyl-4-β-methylcyclohexoxy, -ΝH2, benzyloxy, -NHCH2COOH, -NHCH2CH2COOH, -NH-adamantyl, -NHCH2CH2COOCH2CH3, -NHSO2- -CH3-φ, -NHOR8 where R8 is hydrogen, methyl, wø-propyl or benzyl, O-(N-succinimidyl), -O-cholest-5-en-3-β-yl, -OCH2-OC(O)C(CH3)3, -O(CH2)zNHC(O)W where z is 1 or 2 and W is selected from the group consisting of pyrid-3-yl, N- methylpyridyl, and N-methyl-l,4-dihydro-pyrid-3-yl, -NR"C(O)-R' where
R' is aryl, heteroaryl or heterocyclic and R" is hydrogen or -CH2C(O)OCH2CH3.
Preferred compounds within the scope of formula I and IA above include by way of example:
N-(toluene-4-sulfonyl)-L-prolyl-L-aspartic acid 4-tert-butyl ester
N-(toluene-4-sulfonyl)-L-prolyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(tert-butoxycarbonyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-L-glutamic acid 5-tert-butyl ester
N-(toluene-4-sulfonyl)-L-prolyl-L-glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(carbobenzyloxy)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-0-benzyl-L-serine
N-(toluene-4-sulfonyl)-L-prolyl-β-cyclohexyl-L-alanine
N-(toluene-4-sulfonyl)sarcosyl-β-(N-tert-butoxycarbonylpiperidin-4- yl)-D,L-alanine
N-(toluene-4-sulfonyl)sarcosyl-β-(N-benzoylpiperidin-4-yl)-D,L- alanine
N-(toluene-4-sulfonyl)sarcosyl-Ne-tert-butoxycarbonyl-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-tert-butoxycarbonyl-D-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(allyloxycarbonyl)-L-lysine
N-(3,5-ditrifluoromethylbenzenesulfonyl)-L-prolyl-Ne- (allyloxycarbonyl)-L-lysine N-(toluene-4-sulfonyl)sarcosyl-Ne-(allyloxycarbonyl)-L-lysine
N-(toluene-4-sulfonyl)sarcosyl-5-(allyloxycarbonylamino)pentanoic acid
N-(toluene-4-sulfonyl)sarcosyl-4-(allyloxycarbonylamino)butanoic acid
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(allyloxycarbonyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-4-(allyloxycarbonylamino)butanoic acid
N-(toluene-4-sulfonyl)-L-glutaminyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-[N-(toluene-4-sulfonyl)sarcosyl]- L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-(2,3-dehydro)phenylalanine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(4-phenyl)butyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(indol-3-ylacetyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-[3-(indol-3-yl)propionyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(5-methoxyindol-3-carbonyl)-L- lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(4-fluorophenoxyacetyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-R-(l-phenyl)ethyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-S-(l-phenyl)ethyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(4-nitrophenyl)methyl-L- asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nδ-benzyl-Nδ-methyl-L-glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Nδ-2-(l-methylpyrrol-2-yl)ethyl-L- glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Nδ-n-butyl-L-glutamine N-(toluene-4-sulfonyl)-L-prolyl-Nδ-2-(indol-3-yl)ethyl-L-glutamine
N-(toluene-4-sulfonyl)sarcosyl-Nγ-benzyl-Nγ-methyl-L-asparagine
N-(toluene-4-sulfonyl)sarcosyl-Nγ-2-(l-methylpyrrol-2-yl)ethyl-L- asparagine
N-(toluene-4-sulfonyl)sarcosyl-Nγ-n-butyl-L-asparagine
N-(toluene-4-sulfonyl)sarcosyl-Nγ-2-(indol-3-yl)ethyl-L-asparagine
N-(toluene-4-sulfonyl)sarcosyl-Nδ-R-(l-phenyl)ethyl-L-glutamine
N-(toluene-4-sulfonyl)sarcosyl-Nδ-S-(l-phenyl)ethyl-L-glutamine
N-(toluene-4-sulfonyl)sarcosyl-Nδ-(4-N,N-dimethylamino- phenyl)methyl-L-glutamine
N-(toluene-4-sulfonyl)sarcosyl-Nδ-(4-nitrophenyl)methyl-L-glutamine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nδ-S-(l-phenyl)ethyl- L-glutamine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nγ-(4-N,N- dimethylaminophenyl)methyl-L-asparagine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nγ-(4- nitrophenyl)methyl-L-asparagine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nγ-benzyl-Nγ- methyl-L-asparagine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nδ-2-(l-methylpyrrol- 2-yl)ethyl-L-glutamine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nδ-n-butyl-L- glutamine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nδ-2-(indol-3- yl)ethyl-L-glutamine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nδ-R-(l-phenyl)ethyl- L-glutamine N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(4-acetamidophenyl)-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(pyrid-4-yl)-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(4-N,N-dimethylaminophenyl)-L- asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(3-methoxyphenyl)-L-asparagine N-(toluene-4-sulfonyl)-L-prolyl-Nδ-(4-chlorophenyl)-L-glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Nδ-(pyrid-2-yl)-L-glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Nδ-(4-methoxyphenyl)-L-glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Nδ-(pyrid-3-yl)-L-glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Nδ)-(toluene-4-sulfonyl)-L-arginine
N-(toluene-4-sulfonyl)-L-prolyl-Nε-(ethylaminocarbonyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(phenylaminocarbonyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(4-methoxyphenylamino- carbonyl)-L-lysine
N-(toluene-4-sulfonyl)-L-(5,5-dimethyl)thiaprolyl-Ne-(tert- butoxycarbonyl)-L-lysine methyl ester
N-(toluene-4-sulfonyl)-L-(5 ,5-dimethyl)thiaprolyl-Ne-(tert- butoxycarbonyl)-L-lysine
N-(toluene-4-sulfonyl)-L-(5,5-dimethyl)thiaprolyl-L-asparagine
N-(toluene-4-sulfonyl)-L-proly 1-Nγ -(4-N,N-dimethylamino- phenyl)methyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(4-N,N-dimethylamino- phenyl)methyl-L-asparagine methyl ester
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-2-(N,N-dimethylamino)ethyl-L- asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(ethylaminocarbonyl)-L-lysine 468 N-(toluene-4-sulfonyl)-L-prolyl-Ne-(N-tert-butoxycarbonylglycinyl)- L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-[N-(carbobenzyloxy)iso- nipecotoylj-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(N-toluene-4-sulfonyl-L-prolyl)- L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(isonipecotoyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-3-[N-(carbobenzyl- oxy)amino]propionic acid
N-(toluene-4-sulfonyl)-L-prolyl-Nγ ,Nγ-dimethyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-3-[N-(tert-butoxycarbonyl)amino]-2S- propionic acid methyl ester
N-(toluene-4-sulfonyl)-L-(5-oxo) prolyl-L-asparagine
and pharmaceutically acceptable salts thereof as well as any of the ester compounds recited above wherein one ester is replaced with another ester selected from the group consisting of methyl ester, ethyl ester, π-propyl ester, isopropyl ester, n-butyl ester, isobutyl ester, sec-butyl ester and tert- butyl ester.
This invention also provides methods for binding VLA-4 in a biological sample which method comprises contacting the biological sample with a compound of formula I or IA above under conditions wherein said compound binds to VLA-4.
Certain of the compounds of formula I and IA above are also useful in reducing VLA-4 mediated inflammation in vivo.
This invention also provides pharmaceutical compositions comprising a pharmaceutically acceptable carrier and a therapeutically effective amount of one or more the compounds of formula I or IA above with the exception that R3 and R5 are derived from L-amino acids or other similarly configured starting materials. Alternatively, racemic mixtures can be used.
The pharmaceutical compositions may be used to treat VLA-4 mediated disease conditions. Such disease conditions include, by way of example, asthma, Alzheimer's disease, atherosclerosis, AIDS dementia, diabetes (including acute juvenile onset diabetis), inflammatory bowel disease (including ulcerative colitis and Crohn' s disease), multiple sclerosis, rheumatoid arthritis, tissue transplantation, tumor metastasis, meningitis, encephalitis, stroke, and other cerebral traumas, nephritis, retinitis, atopic dermatitis, psoriasis, myocardial ischemia and acute leukocyte-mediated lung injury such as that which occurs in adult respiratory distress syndrome.
Accordingly, this invention also provides methods for the treatment of an inflammatory disease in a patient mediated by VLA-4 which methods comprise administering to the patient the pharmaceutical compositions described above.
Preferred compounds of formula I and IA above include those set forth in Table I below:
R3 O
R1-SO2-N(R2)-C-Q-CH-C-R6
H R5
t
R1 R2 R3 R5 R6 Q= -C(O)NR7- R7 -CH3-φ- R2/R3 = cyclic t-butoxyC(O)-CH2- -OH H 3 carbon atoms (L-pyrrolidinyl)
/7-CH3-Φ- -CH, H N-benzylpiperidin-4-yl-CH2 -OH H -CH3-φ- -CH, H N-(t-butoxycarbonyl)piperidin-4- -OH H yl-CH2-
/?-CH3-φ- -CH, H N-phenylcarbonylpiperidin-4-yl- -OH H CH,-
/7-CH3-φ- -CH, H t-butoxy-C(O)NH-(CH2)4 -OH H -CH3-φ- R2/R3 = cyclic t-butoxy-C(O)NH-(CH2)4- -OH H 3 carbon atoms (L-pyrrolidinyl) -CH3-φ- R2/R3 = cyclic allyloxy-C(O)NH-(CH2)4- -OH H 3 carbon atoms (L-pyrrolidinyl)
3,5- R2/R3 = cyclic allyloxy-C(O)NH-(CH2)4 -OH H di(trifluoro- 3 carbon atoms methyl)phenyl (L-pyrrolidinyl) -CH3-φ- -CH, H alIyloxy-C(O)NH-(CH2)4- -OH H
P-CH3-Φ- -CH, H allyloxy-C(O)NH-(CH2)3- -OH H
t
R1 R2 R3 R5 R6 Q= -C(O)NR7- R7 p-CH3-φ- -CH, H -(CH2)2C(O)NHCH(CH3)φ -OH H
*
(1st isomer) p-CH3-φ- -CH, H (CH2)2C(O)NHCH(CH3)φ -OH H
*
(2nd isomer) p-CH3-φ- -CH, H -(CH2)2C(O)NHCH2-p- -OH H dimethylaminophenyl p-CH3-φ- -CH, H -CH2CH2C(O)NHCH2-p- -OH H nitrophenyl p-CH3-φ- -(CH2)2-2-thienyl H -CH2C(O)NHCH(CH3)φ -OH H
p-CH3-φ- -(CH2)2-2-thienyl H -CH2C(O)NHCH2-p- -OH H dimethylaminophenyl
p-CHj-φ- -(CH2)2-2-thienyl H -CH2C(O)NHCH2-p-nitrophenyl -OH H
P-CH3-Φ- -(CH2)2-2-thienyl H -CH2C(O)N(CH3)CH2-φ -OH H
P-CH3-Φ- -(CH2)2-2-thienyl H -CH2CH2C(O)NHCH2CH2-(N- -OH H methyl)-2- pyrrolyl
R1 R2 R3 R5 R6 -C(O)NR7- R7 p-CH3-φ- -(CH2)2-2-thienyl H -OH H
CH2CH2C(O)NHCH2CH2CH2CH
p-CH3-φ- -(CH2)2-2-thienyl H -CH2CH2C(O)NHCH2CH2-3- -OH H indolyl p-CH3-φ- -(CH2)2-2-thienyl H -(CH2)2C(O)NHCH(CH3)φ -OH H
P-CH3-Φ- R2/R3 = cyclic -CH2C(O)NH-p-[-NHC(O)CH3- -OH H t 3 carbon atoms phenyl] 0 (L-pyrrolidinyl) p-CH3-φ- R2/R3 = cyclic -CH2C(O)NH-4-pyridyl -OH H 3 carbon atoms (L-pyrrolidinyl) p-CH3-φ- R2/R3 = cyclic -CH2C(O)NH-p- -OH H
3 carbon atoms [dimethylaminophenyij (L-pyrrolidinyl) p-CH3-φ- R /R = cyclic -CH2C(O)NH-w-mefhoxyphenyl -OH H 3 carbon atoms (L-pyrrolidinyl)
V
t
DETAILED DESCRIPTION OF THE INVENTION
As above, this invention relates to compounds which inhibit leukocyte adhesion and, in particular, leukocyte adhesion mediated by VLA- 4. However, prior to describing this invention in further detail, the following terms will first be defined.
Definitions
As used herein, "alkyl" refers to alkyl groups preferably having from 1 to 10 carbon atoms and more preferably 1 to 6 carbon atoms. This term is exemplified by groups such as methyl, t-butyl, n-heptyl, octyl and the like.
"Substimted alkyl" refers to an alkyl group, preferably of from 1 to 10 carbon atoms, having from 1 to 5 substituents selected from the group consisting of alkoxy, substimted alkoxy, acyl, acylamino, thiocarbonylamino, acyloxy, amino, amidino, alkyl amidino,thioamidino, aminoacyl, aminocarbonylamino, amino thiocarbonylamino, aminocarbonyloxy, aryl, substimted aryl, aryloxy, substimted aryloxy, aryloxylaryl, substimted aryloxy aryl, cyano, halogen, hydroxyl, nitro, carboxyl, carboxylalkyl, carboxyl-substituted alkyl, carboxyl-cycloalkyl, carboxyl-substimted cycloalkyl, carboxylaryl, carboxyl-substituted aryl, carboxylheteroaryl, carboxyl-substimted heteroaryl, carboxylheterocyclic, carboxyl-substimted heterocyclic, cycloalkyl, substimted cycloalkyl, guanidino, guanidinosulfone, thiol, thioalkyl, substimted thioalkyl, thioaryl, substimted thioaryl, thiocycloalkyl, substimted thiocycloalkyl, thioheteroaryl, substimted thioheteroaryl, thioheterocyclic, substimted thioheterocyclic, heteroaryl, substimted aryl, substimted heteroaryl, heterocyclic, substimted heterocyclic, cycloalkoxy, substimted cycloalkoxy, heteroaryloxy, substimted heteroaryloxy, heterocyclyloxy, substimted heterocyclyloxy, oxycarbonylamino, oxy thiocarbonylamino, -OS(O)2-alkyl, - OS(O)2-substituted alkyl, -OS(O)2-aryl, -OS(O)2-substituted aryl, -OS(O)2- heteroaryl, -OS(O)2-substituted heteroaryl, -OS(O)2-heterocyclic, -OS(O)2- substimted heterocyclic, -OSO2-NRR where R is hydrogen or alkyl, -NRS(O)2-alkyl, -NRS(O)2-substituted alkyl, -NRS(O)2-aryl, -NRS(O)2- substimted aryl, -NRS(O)2-heteroaryl, -NRS(O)2-substimted heteroaryl, -NRS(O)2-heterocyclic, -NRS(O)2-substimted heterocyclic, -NRS(O)2-NR- alkyl, -NRS(O)2-NR-substimted alkyl, -NRS(O)2-NR-aryl, -NRS(O)2-NR- substimted aryl, -NRS(O)2-NR-heteroaryl, -NRS(O)2-NR-substimted heteroaryl, -NRS(O)2-NR-heterocyclic, -NRS(O)2-NR-substimted heterocyclic where R is hydrogen or alkyl, mono- and di-alkylamino, mono- and di-(substituted alkyl)amino, mono- and di-arylamino, mono- and di- substimted arylamino, mono- and di-heteroarylamino, mono- and di- substimted heteroarylamino, mono- and di-heterocyclic amino, mono- and di-substimted heterocyclic amino, unsymmetric di-substimted amines having different substiments selected from alkyl, substimted alkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic and substimted alkyl groups having amino groups blocked by conventional blocking groups such as Boc, Cbz, formyl, and the like or alkyl/substituted alkyl groups substimted with -SO2-alkyl, -SO2-substituted alkyl, -SO2-alkenyl, -SO2-substituted alkenyl, -SO2-cycloalkyl, -SO2- substimted cycloalkyl, -SO2-aryl, -SO2-substituted aryl, -SO2 -heteroaryl, -
SO2-substituted heteroaryl, -SO2-heterocyclic, -SO2-substituted heterocyclic and -SO2NRR where R is hydrogen or alkyl.
"Alkoxy" refers to the group "alkyl-O-" which includes, by way of example, methoxy, ethoxy, «-propoxy, sø-propoxy, n-butoxy, tert-butoxy, sec-butoxy, -pentoxy, n-hexoxy, 1,2-dimethylbutoxy, and the like.
"Substimted alkoxy" refers to the group "substimted alkyl-O-". "Acyl" refers to the groups H-C(O)-, alkyl-C(O)-, substimted alkyl- C(O)-, alkenyl-C(O)-, substimted alkenyl-C(O)-, alkynyl-C(O)-, substimted alkynyl-C(O)- cycloalkyl-C(O)-, substimted cycloalkyl-C(O)-, aryl-C(O)-, substimted aryl-C(O)-, heteroaryl-C(O)-, substimted heteroaryl-C(O), heterocyclic-C(O)-, and substimted heterocyclic-C(O)- provided that a nitrogen atom of the heterocyclic or substimted heterocyclic is not bound to the -C(O)- group wherein alkyl, substituted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic are as defined herein.
The "acylamino" refers to the group -C(O)NRR where each R is independently selected from the group consisting of hydrogen, alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, aryl, substimted aryl, cycloalkyl, substimted cycloalkyl, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic and where each R is joined to form together with the nitrogen atom a heterocyclic or substimted heterocyclic ring wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic are as defined herein.
The term "substimted alkylcarbonylamino" refers only to the acylamino group -C(O)NRR where each R is independently selected from hydrogen, alkyl, substimted alkyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic provided that at least one R is substimted alkyl.
The term "substimted alkenylcarbonylamino" refers only to the acylamino group -C(O)NRR where each R is independently selected from hydrogen, alkyl, alkenyl, substimted alkenyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic provided that at least one R is substimted alkenyl.
The term "substimted alkynylcarbonylamino" refers only to the acylamino group -C(O)NRR where each R is independently selected from hydrogen, alkyl, alkynyl, substimted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic provided that at least one R is substimted alkynyl.
The term "heterocyclylcarbonylamino" refers only to the acylamino group -C(O)NRR where each R is independently selected from hydrogen, alkyl, substimted alkyl, alkenyl, substimted alkenyl alkynyl, substimted alkynyl, cycloalkyl, substituted cycloalkyl, aryl, substimted aryl, heteroaryl, substituted heteroaryl, heterocyclic and substimted heterocyclic provided that at least one R is heterocyclic.
"Thiocarbonylamino" refers to the group -C(S)NRR where each R is independently selected from the group consisting of hydrogen, alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, aryl, substimted aryl, cycloalkyl, substimted cycloalkyl, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic and where each R is joined to form, together with the nitrogen atom a heterocyclic or substituted heterocyclic ring wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic are as defined herein. "Acyloxy" refers to the groups alkyl-C(O)O-, substimted alkyl- C(O)O-, alkenyl-C(O)O-, substimted alkenyl-C(O)O-, alkynyl-C(O)O-, substimted alkynyl-C(O)O-, aryl-C(O)O-, substimted aryl-C(O)O-, cycloalkyl-C(O)O-, substimted cycloalkyl-C(O)O-, heteroaryl-C(O)O-, substimted heteroaryl-C(O)O-, heterocyclic-C(O)O-, and substimted heterocyclic-C(O)O- wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substituted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic are as defined herein.
"Alkenyl" refers to alkenyl group preferably having from 2 to 10 carbon atoms and more preferably 2 to 6 carbon atoms and having at least 1 and preferably from 1-2 sites of alkenyl unsaturation.
"Substimted alkenyl" refers to alkenyl groups having from 1 to 5 substituents selected from the group consisting of alkoxy, substimted alkoxy, acyl, acylamino, thiocarbonylamino, acyloxy, amino, amidino, alkylamidino, thioamidino, aminoacyl, aminocarbonylamino, aminothiocarbonylamino, aminocarbonyloxy, aryl, substimted aryl, aryloxy, substimted aryloxy, aryloxyaryl, substimted aryloxyaryl, halogen, hydroxyl, cyano, nitro, carboxyl, carboxylalkyl, carboxyl-substimted alkyl, carboxyl- cycloalkyl, carboxyl-substimted cycloalkyl, carboxylaryl, carboxyl- substimted aryl, carboxylheteroaryl, carboxyl-substimted heteroaryl, carboxylheterocyclic, carboxyl-substimted heterocyclic, cycloalkyl, substimted cycloalkyl, guanidino, guanidinosulfone, thiol, thioalkyl, substimted thioalkyl, thioaryl, substimted thioaryl, thiocycloalkyl, substimted thiocycloalkyl, thioheteroaryl, substimted thioheteroaryl, thioheterocyclic, substimted thioheterocyclic, heteroaryl, substituted heteroaryl, heterocyclic, substimted heterocyclic, cycloalkoxy, substimted cycloalkoxy, heteroaryloxy, substimted heteroaryloxy, heterocyclyloxy, substimted heterocyclyloxy, oxycarbonylamino, oxy thiocarbonylamino, -OS(O)2-alkyl, -OS(O)2-substituted alkyl, -OS(O)2-aryl, -OS(O)2-substituted aryl, -OS(O)2-heteroaryl, -OS(O)2-substimted heteroaryl, -OS(O)2- heterocyclic, -OS(O)2-substituted heterocyclic, -OSO2-NRR where R is hydrogen or alkyl, -NRS(O)2-alkyl, -NRS(O)2-substituted alkyl, -NRS(O)2- aryl, -NRS(O)2-substituted aryl, -NRS(O)2-heteroaryl, -NRS(O)2-substimted heteroaryl, -NRS(O)2-heterocyclic, -NRS(O)2-substimted heterocyclic, -NRS(O)2-NR-alkyl, -NRS(O)2-NR-substimted alkyl, -NRS(O)2-NR-aryl, -NRS(O)2-NR-substimted aryl, -NRS(O)2-NR-heteroaryl, -NRS(O)2-NR- substimted heteroaryl, -NRS(O)2-NR-heterocyclic, -NRS(O)2-NR-substituted heterocyclic where R is hydrogen or alkyl, mono- and di-alkylamino, mono- and di-(substimted alkyl)amino, mono- and di-arylamino, mono- and di- substimted arylamino, mono- and di-heteroarylamino, mono- and di- substimted heteroarylamino, mono- and di-heterocyclic amino, mono- and di-substimted heterocyclic amino, unsymmetric di-substimted amines having different substiments selected from alkyl, substimted alkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic and substimted alkenyl groups having amino groups blocked by conventional blocking groups such as Boc, Cbz, formyl, and the like or alkenyl/substituted alkenyl groups substimted with -SO2-alkyl, -SO2- substimted alkyl, -SO2-alkenyl, -SO2-substituted alkenyl, -SO2-cycloalkyl, -SO2-substituted cycloalkyl, -SO2-aryl, -SO2-substituted aryl, -SO2- heteroaryl, -SO2-substituted heteroaryl, -SO2-heterocyclic, -SO2-substituted heterocyclic and -SO2NRR where R is hydrogen or alkyl.
"Alkynyl" refers to alkynyl group preferably having from 2 to 10 carbon atoms and more preferably 3 to 6 carbon atoms and having at least 1 and preferably from 1-2 sites of alkynyl unsaturation. "Substimted alkynyl" refers to alkynyl groups having from 1 to 5 substiments selected from the group consisting of alkoxy, substimted alkoxy, acyl, acylamino, thiocarbonylamino, acyloxy, amino, amidino, alkylamidino, thioamidino, aminoacyl, aminocarbonylamino, aminothiocarbonylamino, aminocarbonyloxy, aryl, substimted aryl, aryloxy, substimted aryloxy, aryloxyaryl, substimted aryloxyaryl, halogen, hydroxyl, cyano, nitro, carboxyl, carboxylalkyl, carboxyl-substimted alkyl, carboxyl- cycloalkyl, carboxyl-substimted cycloalkyl, carboxylaryl, carboxyl- substimted aryl, carboxylheteroaryl, carboxyl-substimted heteroaryl, carboxylheterocyclic, carboxyl-substimted heterocyclic, cycloalkyl, substimted cycloalkyl, guanidino, guanidinosulfone, thiol, thioalkyl, substimted thioalkyl, thioaryl, substimted thioaryl, thiocycloalkyl, substimted thiocycloalkyl, thioheteroaryl, substimted thioheteroaryl, thioheterocyclic, substimted thioheterocyclic, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic, cycloalkoxy, substimted cycloalkoxy, heteroaryloxy, substimted heteroaryloxy, heterocyclyloxy, substimted heterocyclyloxy, oxycarbonylamino, oxythiocarbonylamino, -OS(O)2-alkyl, -OS(O)2-substituted alkyl, -OS(O)2-aryl, -OS(O)2-substituted aryl, -OS(O)2-heteroaryl, -OS(O)2-substituted heteroaryl, -OS(O)2- heterocyclic, -OS(O)2-substituted heterocyclic, -OSO2-NRR where R is hydrogen or alkyl, -NRS(O)2-alkyl, -NRS(O)2-substituted alkyl, -NRS(O)2- aryl, -NRS(O)2-substituted aryl, -NRS(O)2-heteroaryl, -NRS(O)2-substituted heteroaryl, -NRS(O)2-heterocyclic, -NRS(O)2-substituted heterocyclic, -NRS(O)2-NR-alkyl, -NRS(O)2-NR-substituted alkyl, -NRS(O)2-NR-aryl, -NRS(O)2-NR-substimted aryl, -NRS(O)2-NR-heteroaryl, -NRS(O)2-NR- substimted heteroaryl, -NRS(O)2-NR-heterocyclic, -NRS(O)2-NR-substimted heterocyclic where R is hydrogen or alkyl, mono- and di-alkylamino, mono- and di-(substituted alkyl)amino, mono- and di-arylamino, mono- and di- substimted arylamino, mono- and di-heteroarylamino, mono- and di- substimted heteroarylamino, mono- and di-heterocyclic amino, mono- and di-substimted heterocyclic amino, unsymmetric di-substimted amines having different substituents selected from alkyl, substimted alkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic and substimted alkynyl groups having amino groups blocked by conventional blocking groups such as Boc, Cbz, formyl, and the like or alkynyl/substimted alkynyl groups substimted with -SO2-alkyl, -SO2- substituted alkyl, -SO2-alkenyl, -SO2-substituted alkenyl, -SO2-cycloalkyl, -SO2-substituted cycloalkyl, -SO2-aryl, -SO2-substituted aryl, -SO2- heteroaryl, -SO2-substituted heteroaryl, -SO2 -heterocyclic, -SO2-substituted heterocyclic and -SO2NRR where R is hydrogen or alkyl.
"Amidino" refers to the group H2NC(=NH)- and the term "alkylamidino" refers to compounds having 1 to 3 alkyl groups (e.g. , alkylHNC(=NH)-).
"Thioamidino" refers to the group RSC(=NH)- where R is hydrogen or alkyl.
"Aminoacyl" refers to the groups -NRC(O)alkyl, -NRC(O)substituted alkyl, -NRC(O)cycloalkyl, -NRC(O)substimted cycloalkyl, -NRC(O)alkenyl, -NRC(O)substimted alkenyl, -NRC(O)alkynyl, -NRC(O)substimted alkynyl, -NRC(O)aryl, -NRC(O)substimted aryl, -NRC(O)heteroaryl, -NRC(O)substituted heteroaryl, -NRC(O)heterocyclic, and -NRC(O)substimted heterocyclic where R is hydrogen or alkyl and wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substituted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic are as defined herein.
"Aminocarbonyloxy" refers to the groups -NRC(O)O-alkyl, -NRC(O)O-substimted alkyl, -NRC(O)O-alkenyl, -NRC(O)O-substimted alkenyl, -NRC(O)O-alkynyl, -NRC(O)O-substimted alkynyl, -NRC(O)O- cycloalkyl, -NRC(O)O-substimted cycloalkyl, -NRC(O)O-aryl, -NRC(O)O- substituted aryl, -NRC(O)O-heteroaryl, -NRC(O)O-substimted heteroaryl, -NRC(O)O-heterocyclic, and -NRC(O)O-substimted heterocyclic where R is hydrogen or alkyl and wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic are as defined herein.
"Oxycarbonylamino" refers to the groups -OC(O)NH2, -OC(O)NRR, -OC(O)NR-alkyl, -OC(O)NR-substituted alkyl, -OC(O)NR-alkenyl, -OC(O)NR-substituted alkenyl, -OC(O)NR-alkynyl, -OC(O)NR-substituted alkynyl, -OC(O)NR-cycloalkyl, -OC(O)NR-substituted cycloalkyl, -OC(O)NR-aryl, -OC(O)NR-substimted aryl, -OC(O)NR-heteroaryl,
-OC(O)NR-substimted heteroaryl,- OC(O)NR-heterocyclic, and -OC(O)NR-substimted heterocyclic where R is hydrogen, alkyl or where each R is joined to form, together with the nitrogen atom a heterocyclic or substimted heterocyclic ring and wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic are as defined herein.
"Oxy thiocarbonylamino" refers to the groups -OC(S)NH2, -OC(S)NRR, -OC(S)NR-alkyl, -OC(S)NR-substituted alkyl, -OC(S)NR- alkenyl, -OC(S)NR-substituted alkenyl, -OC(S)NR-alkynyl, -OC(S)NR- substituted alkynyl, -OC(S)NR-cycloalkyl, -OC(S)NR-substituted cycloalkyl, -OC(S)NR-aryl, -OC(S)NR-substituted aryl, -OC(S)NR-heteroaryl, - OC(S)NR-substimted heteroaryl, -OC(S)NR-heterocyclic, and -OC(S)NR-substimted heterocyclic where R is hydrogen, alkyl or where each R is joined to form together with the nitrogen atom a heterocyclic or substimted heterocyclic ring and wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic are as defined herein.
"Aminocarbonylamino" refers to the groups -NRC(O)NRR, -NRC(O)NR-alkyl, -NRC(O)NR-substituted alkyl, -NRC(O)NR-alkenyl, -NRC(O)NR-substituted alkenyl, -NRC(O)NR-alkynyl,
-NRC(O)NR-substimted alkynyl, -NRC(O)NR-aryl, -NRC(O)NR-substituted aryl, -NRC(O)NR-cycloalkyl, -NRC(O)NR-substituted cycloalkyl, - NRC(O)NR-heteroaryl, and -NRC(O)NR-substituted heteroaryl, - NRC(O)NR-heterocyclic, and -NRC(O)NR-substituted heterocyclic where each R is independently hydrogen, alkyl or where each R is joined to form together with the nitrogen atom a heterocyclic or substimted heterocyclic ring as well as where one of the amino groups is blocked by conventional blocking groups such as Boc, Cbz, formyl, and the like and wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic are as defined herein.
"Aminothiocarbonylamino" refers to the groups -NRC(S)NRR, -NRC(S)NR-alkyl, -NRC(S)NR-substituted alkyl, -NRC(S)NR-alkenyl,
-NRC(S)NR-substituted alkenyl, -NRC(S)NR-alkynyl, -NRC(S)NR- substimted alkynyl, -NRC(S)NR-aryl, -NRC(S)NR-substituted aryl, -NRC(S)NR-cycloalkyl, -NRC(S)NR-substituted cycloalkyl, -NRC(S)NR- heteroaryl, and -NRC(S)NR-substituted heteroaryl, -NRC(S)NR- heterocyclic, and -NRC(S)NR-substituted heterocyclic where each R is independently hydrogen, alkyl or where each R is joined to form together with the nitrogen atom a heterocyclic or substimted heterocyclic ring as well as where one of the amino groups is blocked by conventional blocking groups such as Boc, Cbz, formyl, and the like and wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, cycloalkyl, substituted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substituted heterocyclic are as defined herein.
"Aryl" or "Ar" refers to an unsaturated aromatic carbocyclic group of from 6 to 14 carbon atoms having a single ring (e.g., phenyl) or multiple condensed rings (e.g. , naphthyl or anthryl) which condensed rings may or may not be aromatic (e.g. , 2-benzoxazolinone, 2H-l ,4-benzoxazin-3(4H)- one-7yl, and the like). Preferred aryls include phenyl and naphthyl.
Substimted aryl refers to aryl groups which are substimted with from
1 to 3 substiments selected from the group consisting of hydroxy, acyl, acylamino, thiocarbonylamino, acyloxy, alkyl, substimted alkyl, alkoxy, substimted alkoxy, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, amidino, alkylamidino, thioamidino, amino, aminoacyl, aminocarbonyloxy, aminocarbonylamino, aminothiocarbonylamino, aryl, substimted aryl, aryloxy, substimted aryloxy, cycloalkoxy, substimted cycloalkoxy, heteroaryloxy, substimted heteroaryloxy, heterocyclyloxy, substimted heterocyclyloxy, carboxyl, carboxylalkyl, carboxyl-substimted alkyl, carboxyl-cycloalkyl, carboxyl-substimted cycloalkyl, carboxylaryl, carboxyl- substimted aryl, carboxylheteroaryl, carboxyl-substimted heteroaryl, carboxylheterocyclic, carboxyl-substimted heterocyclic, carboxylamido, cyano, thiol, thioalkyl, substimted thioalkyl, thioaryl, substimted thioaryl, thioheteroaryl, substimted thioheteroaryl, thiocycloalkyl, substituted thiocycloalkyl, thioheterocyclic, substimted thioheterocyclic, cycloalkyl, substimted cycloalkyl, guanidino, guanidinosulfone, halo, nitro, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic, cycloalkoxy, substimted cycloalkoxy, heteroaryloxy, substimted heteroaryloxy, heterocyclyloxy, substimted heterocyclyloxy, oxycarbonylamino, oxy thiocarbonylamino, -S(O)2 -alkyl, -S(O)2-substimted alkyl, -S(O)2-cycloalkyl, -S(O)2-substituted cycloalkyl,
-S(O)2-alkenyl, -S(O)2-substituted alkenyl, -S(O)2-aryl, -S(O)2-substituted aryl, -S(O)2-heteroaryl, -S(O)2-substimted heteroaryl, -S(O)2-heterocyclic, -S(O)2-substimted heterocyclic, -OS(O)2-alkyl, -OS(O)2-substimted alkyl, -OS(O)2-aryl, -OS(O)2-substituted aryl, -OS(O)2-heteroaryl, -OS(O)2- substimted heteroaryl, -OS(O)2-heterocyclic, -OS(O)2-substimted heterocyclic, -OSO2-NRR where R is hydrogen or alkyl, -NRS(O)2-alkyl, -NRS(O)2-substimted alkyl, -NRS(O)2-aryl, -NRS(O)2-substimted aryl, -NRS(O)2-heteroaryl, -NRS(O)2-substimted heteroaryl, -NRS(O)2- heterocyclic, -NRS(O)2-substimted heterocyclic, -NRS(O)2-NR-alkyl, -NRS(O)2-NR-substituted alkyl, -NRS(O)2-NR-aryl, -NRS(O)2-NR- substimted aryl, -NRS(O)2-NR-heteroaryl, -NRS(O)2-NR-substimted heteroaryl, -NRS(O)2-NR-heterocyclic, -NRS(O)2-NR-substimted heterocyclic where R is hydrogen or alkyl, mono- and di-alkylamino, mono- and di-(substimted alkyl)amino, mono- and di-arylamino, mono- and di- substimted arylamino, mono- and di-heteroarylamino, mono- and di- substimted heteroarylamino, mono- and di-heterocyclic amino, mono- and di-substimted heterocyclic amino, unsymmetric di-substimted amines having different substiments selected from alkyl, substimted alkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic and amino groups on the substimted aryl blocked by conventional blocking groups such as Boc, Cbz, formyl, and the like or substimted with -SO2NRR where R is hydrogen or alkyl.
"Aryloxy" refers to the group aryl-O- which includes, by way of example, phenoxy, naphthoxy, and the like. "Substimted aryloxy" refers to substimted aryl-O- groups.
"Aryloxyaryl" refers to the group -aryl-O-aryl.
"Substimted aryloxyaryl" refers to aryloxyaryl groups substimted with from 1 to 3 substiments on either or both aryl rings selected from the group consisting of hydroxy, acyl, acylamino, thiocarbonylamino, acyloxy, alkyl, substimted alkyl, alkoxy, substimted alkoxy, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, amidino, alkylamidino, thioamidino, amino, aminoacyl, aminocarbonyloxy, aminocarbonylamino, ammothiocarbonylamino, aryl, substimted aryl, aryloxy, substimted aryloxy, cycloalkoxy, substimted cycloalkoxy, heteroaryloxy, substimted heteroaryloxy, heterocyclyloxy, substimted heterocyclyloxy, carboxyl, carboxylalkyl, carboxyl-substimted alkyl, carboxyl-cycloalkyl, carboxyl- substimted cycloalkyl, carboxylaryl, carboxyl-substimted aryl, carboxylheteroaryl, carboxyl-substimted heteroaryl, carboxylheterocyclic, carboxyl-substimted heterocyclic, carboxylamido, cyano, thiol, thioalkyl, substimted thioalkyl, thioaryl, substimted thioaryl, thioheteroaryl, substimted thioheteroaryl, thiocycloalkyl, substimted thiocycloalkyl, thioheterocyclic, substimted thioheterocyclic, cycloalkyl, substimted cycloalkyl, guanidino, guanidinosulfone, halo, nitro, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic, cycloalkoxy, substimted cycloalkoxy, heteroaryloxy, substituted heteroaryloxy, heterocyclyloxy, substimted heterocyclyloxy, oxycarbonylamino, oxy thiocarbonylamino, -S(O)2-alkyl, -S(O)2-subsfituted alkyl, -S(O)2-cycloalkyl, -S(O)2-substituted cycloalkyl, -S(O)2-alkenyl, -S(O)2-substituted alkenyl, -S(O)2-aryl, -S(O)2- substituted aryl, -S(O)2-heteroaryl, -S(O)2-substituted heteroaryl, -S(O)2- heterocyclic, -S(O)2-substituted heterocyclic, -OS(O)2-alkyl, -OS(O)2- substituted alkyl, -OS(O)2-aryl, -OS(O)2-substituted aryl, -OS(O)2-heteroaryl, -OS(O)2-substituted heteroaryl, -OS(O)2-heterocyclic, -OS(O)2-substimted heterocyclic, -OSO2-NRR where R is hydrogen or alkyl, -NRS(O)2-alkyl, -NRS(O)2-substimted alkyl, -NRS(O)2-aryl, -NRS(O)2- substimted aryl, -NRS(O)2-heteroaryl, -NRS(O)2-substimted heteroaryl, -NRS(O)2-heterocyclic, -NRS(O)2-substituted heterocyclic, -NRS(O)2-NR- alkyl, -NRS(O)2-NR-substimted alkyl, -NRS(O)2-NR-aryl, -NRS(O)2-NR- substimted aryl, -NRS(O)2-NR-heteroaryl, -NRS(O)2-NR-substituted heteroaryl, -NRS(O)2-NR-heterocyclic, -NRS(O)2-NR-substimted heterocyclic where R is hydrogen or alkyl, mono- and di-alkylamino, mono- and di-(substituted alkyl)amino, mono- and di-arylamino, mono- and di- substimted arylamino, mono- and di-heteroarylamino, mono- and di- substimted heteroarylamino, mono- and di-heterocyclic amino, mono- and di-substimted heterocyclic amino, unsymmetric di-substimted amines having different substiments selected from alkyl, substimted alkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic and amino groups on the substimted aryl blocked by conventional blocking groups such as Boc, Cbz, formyl, and the like or substimted with -SO2NRR where R is hydrogen or alkyl.
"Cycloalkyl" refers to cyclic alkyl groups of from 3 to 8 carbon atoms having a single cyclic ring including, by way of example, cyclopropyl, cyclobutyl, cyclopentyl, cyclooctyl and the like. Excluded from this definition are multi-ring alkyl groups such as adamantanyl, etc.
"Cycloalkenyl" refers to cyclic alkenyl groups of from 3 to 8 carbon atoms having single or multiple unsaturation but which are not aromatic.
"Substimted cycloalkyl" and "substimted cycloalkenyl" refer to a cycloalkyl and cycloalkenyl groups, preferably of from 3 to 8 carbon atoms, having from 1 to 5 substiments selected from the group consisting of oxo (=O), thioxo ( = S), alkoxy, substituted alkoxy, acyl, acylamino, thiocarbonylamino, acyloxy, amino, amidino, alkylamidino, thioamidino, aminoacyl, aminocarbonylamino, aminothiocarbonylamino, aminocarbonyloxy, aryl, substimted aryl, aryloxy, substimted aryloxy, aryloxyaryl, substimted aryloxyaryl, halogen, hydroxyl, cyano, nitro, carboxyl, carboxylalkyl, carboxyl-substimted alkyl, carboxyl-cycloalkyl, carboxyl-substimted cycloalkyl, carboxylaryl, carboxyl-substimted aryl, carboxylheteroaryl, carboxyl-substimted heteroaryl, carboxylheterocyclic, carboxyl-substimted heterocyclic, cycloalkyl, substimted cycloalkyl, guanidino, guanidinosulfone, thiol, thioalkyl, substimted thioalkyl, thioaryl, substimted thioaryl, thiocycloalkyl, substimted thiocycloalkyl, thioheteroaryl, substimted thioheteroaryl, thioheterocyclic, substimted thioheterocyclic, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic, cycloalkoxy, substimted cycloalkoxy, heteroaryloxy, substimted heteroaryloxy, heterocyclyloxy, substimted heterocyclyloxy, oxycarbonylamino, oxy thiocarbonylamino, -OS(O)2-alkyl, -OS(O)2- substituted alkyl, -OS(O)2-aryl, -OS(O)2-substituted aryl, -OS(O)2-heteroaryl, -OS(O)2-substimted heteroaryl, -OS(O)2-heterocyclic, -OS(O)2-substituted heterocyclic, -OSO2-NRR where R is hydrogen or alkyl, -NRS(O)2-alkyl, -NRS(O)2-substituted alkyl, -NRS(O)2-aryl, -NRS(O)2- substimted aryl, -NRS(O)2-heteroaryl, -NRS(O)2-substituted heteroaryl, -NRS(O)2-heterocyclic, -NRS(O)2-substituted heterocyclic, -NRS(O)2-NR-alkyl, -NRS(O)2-NR-substituted alkyl, -NRS(O)2-NR-aryl, -NRS(O)2-NR-substimted aryl, -NRS(O)2-NR-heteroaryl, -NRS(O)2-NR- substituted heteroaryl, -NRS(O)2-NR-heterocyclic, -NRS(O)2-NR-substituted heterocyclic where R is hydrogen or alkyl, mono- and di-alkylamino, mono- and di-(substituted alkyl)amino, mono- and di-arylamino, mono- and di- substimted arylamino, mono- and di-heteroarylamino, mono- and di- substimted heteroarylamino, mono- and di-heterocyclic amino, mono- and di-substimted heterocyclic amino, unsymmetric di-substimted amines having different substiments selected from alkyl, substimted alkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic and substimted alkynyl groups having amino groups blocked by conventional blocking groups such as Boc, Cbz, formyl, and the like or alkynyl/ substimted alkynyl groups substimted with -SO2-alkyl, -SO2- substimted alkyl, -SO2-alkenyl, -SO2-substituted alkenyl, -SO2-cycloalkyl, -SO2-substimted cycloalkyl, -SO2-aryl, -SO2-substituted aryl, -SO2- heteroaryl, -SO2-substituted heteroaryl, -SO2-heterocyclic, -SO2-substituted heterocyclic and -SO2NRR where R is hydrogen or alkyl.
"Cycloalkoxy" refers to -O-cycloalkyl groups.
"Substimted cycloalkoxy" refers to -O-substituted cycloalkyl groups. "Guanidino" refers to the groups -NRC(=NR)NRR, -NRC(=NR)NR-alkyl, -NRC(=NR)NR-substituted alkyl, -NRC(=NR)NR- alkenyl, -NRC(=NR)NR-substituted alkenyl, -NRC(=NR)NR-alkynyl, -NRC(=NR)NR-substituted alkynyl, -NRC(=NR)NR-aryl, -NRC(=NR)NR-substituted aryl, -NRC(=NR)NR-cycloalkyl, -NRC(=NR)NR-heteroaryl, -NRC(=NR)NR-substituted heteroaryl, -NRC( = NR)NR-heterocyclic, and -NRC( = NR)NR-substimted heterocyclic where each R is independently hydrogen and alkyl as well as where one of the amino groups is blocked by conventional blocking groups such as Boc, Cbz, formyl, and the like and wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substituted alkynyl, cycloalkyl, substituted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic are as defined herein.
"Guanidinosulfone" refers to the groups -NRC(=NR)NRSO2-alkyl, -NRC(=NR)NRSO2-substituted alkyl, -NRC(=NR)NRSO2-alkenyl, -NRC( = NR)NRSO2-substimted alkenyl , -NRC( = NR)NRSO2-alkynyl , -NRC(=NR)NRSO2-substituted alkynyl, -NRC(=NR)NRSO2-aryl, -NRC(=NR)NRSO2-substimted aryl, -NRC(=NR)NRSO2-cycloalkyl, -NRC(=NR)NRSO2-substituted cycloalkyl, -NRC(=NR)NRSO2-heteroaryl, and -NRC(=NR)NRSO2-substimted heteroaryl, -NRC( = NR)NRSO2- heterocyclic, and -NRC(=NR)NRSO2-substituted heterocyclic where each R is independently hydrogen and alkyl and wherein alkyl, substimted alkyl, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic are as defined herein.
"Halo" or "halogen" refers to fluoro, chloro, bromo and iodo and preferably is either chloro or bromo.
"Heteroaryl" refers to an aromatic carbocyclic group of from 2 to 10 carbon atoms and 1 to 4 heteroatoms selected from oxygen, nitrogen and sulfur within the ring. Such heteroaryl groups can have a single ring (e.g., pyridyl or furyl) or multiple condensed rings (e.g., indolizinyl or benzothienyl). Preferred heteroaryls include pyridyl, pyrrolyl, indolyl and furyl.
"Substimted heteroaryl" refers to heteroaryl groups which are substimted with from 1 to 3 substiments selected from the group consisting of hydroxy, acyl, acylamino, thiocarbonylamino, acyloxy, alkyl, substimted alkyl, alkoxy, substimted alkoxy, alkenyl, substimted alkenyl, alkynyl, substimted alkynyl, amidino, alkylamidino, thioamidino, amino, aminoacyl, aminocarbonyloxy, aminocarbonylamino, aminothiocarbonylamino, aryl, substimted aryl, aryloxy, substimted aryloxy, cycloalkoxy, substimted cycloalkoxy, heteroaryloxy, substimted heteroaryloxy, heterocyclyloxy, substituted heterocyclyloxy, carboxyl, carboxylalkyl, carboxyl-substimted alkyl, carboxyl-cycloalkyl, carboxyl-substimted cycloalkyl, carboxylaryl, carboxyl-substimted aryl, carboxylheteroaryl, carboxyl-substimted heteroaryl, carboxylheterocyclic, carboxyl-substituted heterocyclic, carboxylamido, cyano, thiol, thioalkyl, substimted thioalkyl, thioaryl, substimted thioaryl, thioheteroaryl, substimted thioheteroaryl, thiocycloalkyl, substituted thiocycloalkyl, thioheterocyclic, substimted thioheterocyclic, cycloalkyl, substituted cycloalkyl, guanidino, guanidinosulfone, halo, nitro, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic, cycloalkoxy, substimted cycloalkoxy, heteroaryloxy, substimted heteroaryloxy, heterocyclyloxy, substimted heterocyclyloxy, oxycarbonylamino, oxythiocarbonylamino, -S(O)2-alkyl, -S(O)2-substituted alkyl, -S(O)2-cycloalkyl, -S(O)2-substituted cycloalkyl, -S(O)2-alkenyl, -S(O)2-substituted alkenyl, -S(O)2-aryl, -S(O)2-substituted aryl, -S(O)2-heteroaryl, -S(O)2-substituted heteroaryl, -S(O)2-heterocyclic, -S(O)2-substituted heterocyclic, -OS(O)2-alkyl, -OS(O)2-substituted alkyl, -OS(O)2-aryl, -OS(O)2-substituted aryl, -OS(O)2-heteroaryl, -OS(O)2- substimted heteroaryl, -OS(O)2-heterocyclic, -OS(O)2-substimted heterocyclic, -OSO2-NRR where R is hydrogen or alkyl, -NRS(O)2-alkyl, -NRS(O)2-substituted alkyl, -NRS(O)2-aryl, -NRS(O)2-substituted aryl, -NRS(O)2-heteroaryl, -NRS(O)2-substimted heteroaryl, -NRS(O)2- heterocyclic, -NRS(O)2-substimted heterocyclic, -NRS(O)2-NR-alkyl, -NRS(O)2-NR-substituted alkyl, -NRS(O)2-NR-aryl, -NRS(O)2-NR- substimted aryl, -NRS(O)2-NR-heteroaryl, -NRS(O)2-NR-substimted heteroaryl, -NRS(O)2-NR-heterocyclic, -NRS(O)2-NR-substimted heterocyclic where R is hydrogen or alkyl, mono- and di-alkylamino, mono- and di-(substituted alkyl)amino, mono- and di-arylamino, mono- and di- substimted arylamino, mono- and di-heteroarylamino, mono- and di- substimted heteroarylamino, mono- and di-heterocyclic amino, mono- and di-substimted heterocyclic amino, unsymmetric di-substimted amines having different substiments selected from alkyl, substituted alkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic and amino groups on the substimted aryl blocked by conventional blocking groups such as Boc, Cbz, formyl, and the like or substimted with -SO2NRR where R is hydrogen or alkyl.
"Heteroaryloxy" refers to the group -O-heteroaryl and "substimted heteroaryloxy" refers to the group -O-substituted heteroaryl.
"Heterocycle" or "heterocyclic" refers to a saturated or unsaturated group having a single ring or multiple condensed rings, from 1 to 10 carbon atoms and from 1 to 4 hetero atoms selected from nitrogen, sulfur or oxygen within the ring wherein, in fused ring systems, one or more the rings can be aryl or heteroaryl.
"Saturated heterocyclic" refers to heterocycles of single or multiple condensed rings lacking unsaturation in any ring (e.g. , carbon to carbon unsaturation, carbon to nitrogen unsaturation, nitrogen to nitrogen unsaturation, and the like).
"Unsaturated heterocyclic" refers to non-aromatic heterocycles of single or multiple condensed rings having unsaturation in any ring (e.g. , carbon to carbon unsaturation, carbon to nitrogen unsaturation, nitrogen to nitrogen unsaturation, and the like).
"Substimted heterocyclic" refers to heterocycle groups which are substimted with from 1 to 3 substiments selected from the group consisting of oxo (=O), thioxo (=S), alkoxy, substituted alkoxy, acyl, acylamino, thiocarbonylamino, acyloxy, amino, amidino, alkylamidino, thioamidino, aminoacyl, aminocarbonylamino, aminothiocarbonylamino, aminocarbonyloxy, aryl, substimted aryl, aryloxy, substimted aryloxy, aryloxyaryl, substimted aryloxyaryl, halogen, hydroxyl, cyano, nitro, carboxyl, carboxylalkyl, carboxyl-substimted alkyl, carboxyl-cycloalkyl, carboxyl-substimted cycloalkyl, carboxylaryl, carboxyl-substimted aryl, carboxylheteroaryl, carboxyl-substimted heteroaryl, carboxylheterocyclic, carboxyl-substimted heterocyclic, cycloalkyl, substimted cycloalkyl, guanidino, guanidinosulfone, thiol, thioalkyl, substimted thioalkyl, thioaryl, substimted thioaryl, thiocycloalkyl, substimted thiocycloalkyl, thioheteroaryl, substimted thioheteroaryl, thioheterocyclic, substimted thioheterocyclic, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic, cycloalkoxy, substituted cycloalkoxy, heteroaryloxy, substimted heteroaryloxy, heterocyclyloxy, substimted heterocyclyloxy, oxycarbonylamino, oxythiocarbonylamino, -OS(O)2-alkyl, -OS(O)2- substimted alkyl, -OS(O)2-aryl, -OS(O)2-substituted aryl, -OS(O)2-heteroaryl, -OS(O)2-substituted heteroaryl, -OS(O)2-heterocyclic, -OS(O)2-substituted heterocyclic, -OSO2-NRR where R is hydrogen or alkyl, -NRS(O)2-alkyl, -NRS(O)2-substituted alkyl, -NRS(O)2-aryl, -NRS(O)2- substimted aryl, -NRS(O)2-heteroaryl, -NRS(O)2-substituted heteroaryl, -NRS(O)2-heterocyclic, -NRS(O)2-substituted heterocyclic, -NRS(O)2-NR-alkyl, -NRS(O)2-NR-substimted alkyl, -NRS(O)2-NR-aryl, -NRS(O)2-NR-substituted aryl, -NRS(O)2-NR-heteroaryl, -NRS(O)2-NR- substimted heteroaryl, -NRS(O)2-NR-heterocyclic, -NRS(O)2-NR-substimted heterocyclic where R is hydrogen or alkyl, mono- and di-alkylamino, mono- and di-(substimted alkyl)amino, mono- and di-arylamino, mono- and di- substimted arylamino, mono- and di-heteroarylamino, mono- and di- substimted heteroarylamino, mono- and di-heterocyclic amino, mono- and di-substimted heterocyclic amino, unsymmetric di-substituted amines having different substiments selected from alkyl, substimted alkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic and substimted alkynyl groups having amino groups blocked by conventional blocking groups such as Boc, Cbz, formyl, and the like or alkynyl/substituted alkynyl groups substimted with -SO2-alkyl, -SO2- substituted alkyl, -SO2-alkenyl, -SO2-substimted alkenyl, -SO2-cycloalkyl, -SO2-substimted cycloalkyl, -SO2-aryl, -SO2-substimted aryl, -SO2- heteroaryl, -SO2-substituted heteroaryl, -SO2-heterocyclic, -SO2-substimted heterocyclic and -SO2NRR where R is hydrogen or alkyl.
Examples of heterocycles and heteroaryls include, but are not limited to, azetidine, pyrrole, imidazole, pyrazole, pyridine, pyrazine, pyrimidine, pyridazine, indolizine, isoindole, indole, dihydroindole, indazole, purine, quinolizine, isoquinoline, quinoline, phthalazine, naphthylpyridine, quinoxaline, quinazoline, cinnoline, pteridine, carbazole, carboline, phenanthridine, acridine, phenanthroline, isothiazole, phenazine, isoxazole, phenoxazine, phenothiazine, imidazolidine, imidazoline, piperidine, piperazine, indoline, phthalimide, 1,2,3,4-tetrahydroisoquinoline, 4,5,6,7- tetrahydrobenzo[b]thiophene, thiazole, thiazolidine, thiophene, benzo[b]thiophene, morpholino, thiomorpholino, piperidinyl, pyrrolidine, tetrahydrofuranyl, and the like.
"Saturated substimted heterocyclic" refers to substimted heterocycles of single or multiple condensed rings lacking unsamration in any ring (e.g., carbon to carbon unsamration, carbon to nitrogen unsamration, nitrogen to nitrogen unsamration, and the like).
"Unsaturated substimted heterocyclic" refers to non-aromatic substimted heterocycles of single or multiple condensed rings having unsamration in any ring (e.g., carbon to carbon unsamration, carbon to nitrogen unsamration, nitrogen to nitrogen unsamration, and the like).
"Heterocyclyloxy" refers to the group -O-heterocyclic and "substimted heterocyclyloxy" refers to the group -O-substimted heterocyclic. "Thiol" refers to the group -SH.
"Thioalkyl" refers to the groups -S-alkyl
"Substimted thioalkyl" refers to the group -S-substimted alkyl.
"Thiocycloalkyl" refers to the groups -S-cycloalkyl.
"Substimted thiocycloalkyl" refers to the group -S-substimted cycloalkyl.
"Thioaryl" refers to the group -S-aryl and "substimted thioaryl" refers t the group -S-substimted aryl.
"Thioheteroaryl" refers to the group -S-heteroaryl and "substimted thioheteroaryl" refers to the group -S-substimted heteroaryl.
"Thioheterocyclic" refers to the group -S-heterocyclic and "substimted thioheterocyclic" refers to the group -S-substimted heterocyclic.
"Pharmaceutically acceptable salt" refers to pharmaceutically acceptable salts of a compound of Formula I which salts are derived from a variety of organic and inorganic counter ions well known in the art and include, by way of example only, sodium, potassium, calcium, magnesium, ammonium, tetraalkylammonium, and the like; and when the molecule contains a basic functionality, salts of organic or inorganic acids, such as hydrochloride, hydrobromide, tartrate, mesylate, acetate, maleate, oxalate and the like. Compound Preparation
The compounds of this invention can be prepared from readily available starting materials using the following general methods and procedures. It will be appreciated that where typical or preferred process conditions (i.e. , reaction temperatures, times, mole ratios of reactants, solvents, pressures, etc.) are given, other process conditions can also be used unless otherwise stated. Optimum reaction conditions may vary with the particular reactants or solvent used, but such conditions can be determined by one skilled in the art by routine optimization procedures.
Additionally, as will be apparent to those skilled in the art, conventional protecting groups may be necessary to prevent certain functional groups from undergoing undesired reactions. Suitable protecting groups for various functional groups as well as suitable conditions for protecting and deprotecting particular functional groups are well known in the art. For example, numerous protecting groups are described in T. W. Greene and G. M. Wuts, Protecting Groups in Organic Synthesis, Second Edition, Wiley, New York, 1991, and references cited therein.
Furthermore, the compounds of this invention will typically contain one or more chiral centers. Accordingly, if desired, such compounds can be prepared or isolated as pure stereoisomers, i.e. , as individual enantiomers or diastereomers, or as stereoisomer-enriched mixmres. All such stereoisomers (and enriched mixmres) are included within the scope of this invention, unless otherwise indicated. Pure stereoisomers (or enriched mixmres) may be prepared using, for example, optically active starting materials or stereoselective reagents well-known in the art. Alternatively, racemic mixmres of such compounds can be separated using, for example, chiral column chromatography, chiral resolving agents and the like. In a preferred method of synthesis, the compounds of formula I and IA wherein Q is -C(O)NR7- are prepared by first coupling an amino acid of formula II:
R3
R2-NH-C-COOH II
H
wherein R2 and R3 are as defined above, with a sulfonyl chloride of formula III:
wherein R1 is as defined above, to provide an N-sulfonyl amino acid of formula IV:
R3
R1-SO2-Ν(R2)-C-COOH IV
H
wherein R!-R3 are as defined above.
This reaction is typically conducted by reacting the amino acid of formula II with at least one equivalent, preferably about 1.1 to about 2 equivalents, of sulfonyl chloride III in an inert diluent such as dichloromethane and the like. Generally, the reaction is conducted at a temperamre ranging from about -70 °C to about 40 °C for about 1 to about 24 hours. Preferably, this reaction is conducted in the presence of a suitable base to scavenge the acid generated during the reaction. Suitable bases include, by way of example, tertiary amines, such as triethylamine, diisopropylethylamme, N-methylmorpholine and the like. Alternatively, the reaction can be conducted under Schotten-Baumann-type conditions using aqueous alkali, such as sodium hydroxide and the like, as the base. Upon completion of the reaction, the resulting N-sulfonyl amino acid IV is recovered by conventional methods including neutralization, extraction, precipitation, chromatography, filtration, and the like.
The amino acids of formula II employed in the above reaction are either known compounds or compounds that can be prepared from known compounds by conventional synthetic procedures. Examples of suitable amino acids for use in this reaction include, but are not limited to, L-proline, trα -4-hydroxyl-L-proline, '.s-4-hydroxyl-L-proline, trans-3-phenyl-L- proline, -3-phenyl-L-proline, L-(2-mefhyl)proline, L-pipecolinic acid, L- azetidine-2-carboxylic acid, L-indoline-2-carboxylic acid, L-1 ,2,3,4- tetrahydroisoquinoline-3-carboxylic acid, L-thiazolidine-4-carboxylic acid, L-(5 ,5-dimethyl)thiazolidine-4-carboxylic acid, L-thiamorpholine-3- carboxylic acid, glycine, 2-tert-butylglycine, D,L-phenylglycine, L-alanine, α-methylalanine, N-methyl-L-phenylalanine, L-diphenylalanine, sarcosine, D,L-phenylsarcosine, L-aspartic acid β-tert-butyl ester, L-glutamic acid γ- tert-butyl ester, L-(<9-benzyl)serine, 1-aminocyclopropanecarboxylic acid, 1- aminocyclobutanecarboxylic acid, 1-aminocyclopentanecarboxylic acid (cycloleucine) 1-aminocyclohexanecarboxylic acid, L-serine and the like. If desired, the corresponding carboxylic acid esters of the amino acids of formula II, such as the methyl esters, ethyl esters and the like, can be employed in the above reaction with the sulfonyl chloride III. Subsequent hydrolysis of the ester group to the carboxylic acid using conventional reagents and conditions, i.e. , treatment with an alkali metal hydroxide in an inert diluent such as methanol/ water, then provides the N-sulfonyl amino acid IV. Similarly, the sulfonyl chlorides of formula III employed in the above reaction are either known compounds or compounds that can be prepared from known compounds by conventional synthetic procedures. Such compounds are typically prepared from the corresponding sulfonic acid, i.e., from compounds of the formula R1-SO3H where R1 is as defined above, using phosphorous trichloride and phosphorous pentachloride. This reaction is generally conducted by contacting the sulfonic acid with about 2 to 5 molar equivalents of phosphorous trichloride and phosphorous pentachloride, either neat or in an inert solvent, such as dichloromethane, at temperamre in the range of about 0°C to about 80 °C for about 1 to about 48 hours to afford the sulfonyl chloride. Alternatively, the sulfonyl chlorides of formula III can be prepared from the corresponding thiol compound, i.e., from compounds of the formula R^SH where R1 is as defined above, by treating the thiol with chlorine (Cl2) and water under conventional reaction conditions.
Examples of sulfonyl chlorides suitable for use in this invention include, but are not limited to, methanesulfonyl chloride, 2-propanesulfonyl chloride, 1-butanesulfonyl chloride, benzenesulfonyl chloride, 1- naphthalenesulfonyl chloride, 2-naphthalenesulfonyl chloride, p- toluenesulfonyl chloride, α-toluenesulfonyl chloride, 4- acetamidobenzenesulfonyl chloride, 4-amidinobenzenesulfonyl chloride, 4- tert-butylbenzenesulfonyl chloride, 4-bromobenzenesulfonyl chloride, 2- carboxybenzenesulfonyl chloride, 4-cyanobenzenesulfonyl chloride, 3,4- dichlorobenzenesulfonyl chloride, 3,5-dichlorobenzenesulfonyl chloride, 3,4- dimethoxybenzenesulfonyl chloride, 3,5-ditrifluoromethylbenzenesulfonyl chloride, 4-fluorobenzenesulfonyl chloride, 4-methoxy benzenesulfonyl chloride, 2-mefhoxycarbonylbenzenesulfonyl chloride, 4- methylamidobenzenesulfonyl chloride, 4-nitrobenzenesulfonyl chloride, 4- thioamidobenzenesulfonyl chloride , 4-trifluoromethylbenzenesulfonyl chloride, 4-trifluoromethoxybenzenesulfonyl chloride, 2,4,6- trimethylbenzenesulfonyl chloride, 2-phenylethanesulfonyl chloride, 2- thiophenesulfonyl chloride, 5-chloro-2-thiophenesulfonyl chloride, 2,5- dichloro-4-thiophenesulfonyl chloride, 2-thiazolesulfonyl chloride, 2-mefhyl- 4-thiazolesulfonyl chloride, l-methyl-4-imidazolesulfonyl chloride, 1- methyl-4-pyrazolesulfonyl chloride, 5 -chloro- 1,3 -dimethy 1-4- pyrazolesulfonyl chloride, 3-pyridinesulfonyl chloride, 2-pyrimidinesulfonyl chloride, and the like. If desired, a sulfonyl fluoride, sulfonyl bromide or sulfonic acid anhydride may be used in place of the sulfonyl chloride in the above reaction to form the N-sulfonyl amino acids of formula IV.
The intermediate N-sulfonyl amino acids of formula IV can also be prepared by reacting a sulfonamide of formula V:
wherein R1 and R2 are as defined above, with a carboxylic acid derivative of the formula L(R3)CHCOOR or where L is a leaving group, such as chloro, bromo, iodo, mesylate, tosylate and the like, R3 is as defined above and R is hydrogen or an alkyl group. This reaction is typically conducted by contacting the sulfonamide V with at least one equivalent, preferably 1.1 to 2 equivalents, of the carboxylic acid derivative in the presence of a suitable base, such as triethylamine, in an inert diluent, such as DMF, at a temperamre ranging from about 24 °C to about 37 °C for about 0.5 to about 4 hours. This reaction is further described in Zuckermann et al., J. Am.
Chem. Soc , 1992, 114, 10646-10647. Preferred carboxylic acid derivatives for use in this reaction are -chloro and -bromocarboxylic acid esters such as tert-butyl bromoacetate and the like. When an carboxylic acid ester is employed in this reaction, the ester group is subsequently hydrolyzed using conventional procedures to afford an N-sulfonyl amino acid of formula IV. The compounds of formula I are then prepared by coupling the intermediate N-sulfonyl amino acid of formula IV with an amino acid derivative of formula VI:
O
R7-ΝH-CH-C-R6 VI
R5
wherein R5-R7 are as defined above and, in addition, R6 can be hydroxyl. This coupling reaction is typically conducted using well-known coupling reagents such as carbodiimides, BOP reagent (benzotriazol-1-yloxy- tris(dimethylamino)phosphonium hexafluorophosphonate) and the like. Suitable carbodiimides include, by way of example, dicyclohexylcarbodiimide (DCC), l-(3-dimethylaminopropyl)-3- ethylcarbodiimide (EDC) and the like. If desired, polymer supported forms of carbodumide coupling reagents may also be used including, for example, those described in Tetrahedron Letters, 34(48), 7685 (1993). Additionally, well-known coupling promoters, such as N-hydroxysuccinimide, 1- hydroxybenzotriazole and the like, may be used to facilitate the coupling reaction.
This coupling reaction is typically conducted by contacting the N- sulfonylamino acid IV with about 1 to about 2 equivalents of the coupling reagent and at least one equivalent, preferably about 1 to about 1.2 equivalents, of amino acid derivative VI in an inert diluent, such as dichloromethane, chloroform, acetonitrile, tetrahydrofuran, N,N- dimethylformamide and the like. Generally, this reaction is conducted at a temperamre ranging from about 0°C to about 37°C for about 12 to about 24 hours. Upon completion of the reaction, the compound of formula I is recovered by conventional methods including neutralization, extraction, precipitation, chromatography, filtration, and the like.
Alternatively, the N-sulfonyl amino acid IV can be converted into an acid halide and the acid halide coupled with amino acid derivative VI to provide compounds of formula I. The acid halide of VI can be prepared by contacting VI with an inorganic acid halide, such as thionyl chloride, phosphorous trichloride, phosphorous tribromide or phosphorous pentachloride, or preferably, with oxalyl chloride under conventional conditions. Generally, this reaction is conducted using about 1 to 5 molar equivalents of the inorganic acid halide or oxalyl chloride, either neat or in an inert solvent, such as dichloromethane or carbon tetrachloride, at temperature in the range of about 0°C to about 80 °C for about 1 to about 48 hours. A catalyst, such as N,N-dimethylformamide, may also be used in this reaction.
The acid halide of N-sulfonyl amino acid IV is then contacted with at least one equivalent, preferably about 1.1 to about 1.5 equivalents, of amino acid derivative VI in an inert diluent, such as dichloromethane, at a temperamre ranging from about -70 °C to about 40 °C for about 1 to about 24 hours. Preferably, this reaction is conducted in the presence of a suitable base to scavenge the acid generated during the reaction. Suitable bases include, by way of example, tertiary amines, such as triethylamine, diisopropylethylamine, N-methylmorpholine and the like. Alternatively, the reaction can be conducted under Schotten-Baumann-type conditions using aqueous alkali, such as sodium hydroxide and the like. Upon completion of the reaction, the compound of formula I is recovered by conventional methods including neutralization, extraction, precipitation, chromatography, filtration, and the like. Alternatively, the compounds of formula I can be prepared by first forming a diamino acid derivative of formula VII:
R3 R7 O I I II
R2-NH-C-C(O)N-CH-C-R6 VII
H R5
wherein R2-R7 are as defined above. The diamino acid derivatives of formula VII can be readily prepared by coupling an amino acid of formula II with an amino acid derivative of formula VI using conventional amino acid coupling techniques and reagents, such carbodiimides, BOP reagent and the like, as described above. Diamino acid VII can then be sulfonated using a sulfonyl chloride of formula III and using the synthetic procedures described above to provide a compound of formula I.
The amino acid derivatives of formula VI employed in the above reactions are either known compounds or compounds that can be prepared from known compounds by conventional synthetic procedures. For example, amino acid derivatives of formula VI can be prepared by C- alkylating commercially available diethyl 2-acetamidomalonate (Aldrich, Milwaukee, Wisconsin, USA) with an alkyl or substimted alkyl halide. This reaction is typically conducted by treating the diethyl 2-acetamidomalonate with at least one equivalent of sodium ethoxide and at least one equivalent of an alkyl or substimted alkyl halide in refluxing ethanol about 6 to about 12 hours. The resulting C-alkylated malonate is then deacetylated, hydro lyzed and decarboxylated by heating in aqueous hydrochloric acid at reflux for about 6 to about 12 hours to provide the amino acid, typically as the hydrochloride salt. Examples of amino acid derivatives of formula VI suitable for use in the above reactions include, but are not limited to, β-tert-butyl-L-aspartic acid methyl ester, L-asparagine tert-butyl ester, e-Boc-L-lysine methyl ester, e-Cbz-L-lysine methyl ester, γ-tert-butyl-L-glutamic acid methyl ester, L- glutamine tert-butyl ester, and the like. If desired, of course, other esters or amides of the above-described compounds may also be employed.
For ease of synthesis, the compounds of formula I are typically prepared as an ester, i.e., where R6 is an alkoxy or substimted alkoxy group and the like. If desired, the ester group can be hydrolysed using conventional conditions and reagents to provide the corresponding carboxylic acid. Typically, this reaction is conducted by treating the ester with at least one equivalent of an alkali metal hydroxide, such as lithium, sodium or potassium hydroxide, in an inert diluent, such as methanol or mixmres of methanol and water, at a temperamre ranging about 0°C to about 24°C for about 1 to about 12 hours. Alternatively, benzyl esters may be removed by hydrogenolysis using a palladium catalyst, such as palladium on carbon. The resulting carboxylic acids may be coupled, if desired, to amines such as β-alanine ethyl ester, hydroxyamines such as hydroxylamine and N- hydroxysuccinimide, alkoxyamines and substimted alkoxyamines such as O- methylhydroxylamine and O-benzylhydroxylamine, and the like, using conventional coupling reagents and conditions as described above.
As will be apparent to those skilled in the art, other functional groups present on any of the substiments of the compounds of formula I can be readily modified or derivatized either before or after the above-described coupling reactions using well-known synthetic procedures. For example, a nitro group present on a substiment of a compound of formula I or an intermediate thereof may be readily reduced by hydrogenation in the presence of a palladium catalyst, such as palladium on carbon, to provide the corresponding amino group. This reaction is typically conducted at a temperamre of from about 20 °C to about 50 °C for about 6 to about 24 hours in an inert diluent, such as methanol. Compounds having a nitro group on the R3 substiment can be prepared, for example, by using a 4- nitrophenylalanine derivative and the like in the above-described coupling reactions.
Similarly, a pyridyl group can be hydrogenated in the presence of a platinum catalyst, such as platinum oxide, in an acidic diluent to provide the corresponding piperidinyl analogue. Generally, this reaction is conducted by treating the pyridine compound with hydrogen at a pressure ranging from about 20 psi to about 60 psi, preferably about 40 psi, in the presence of the catalyst at a temperamre of about 20 °C to about 50 °C for about 2 to about 24 hours in an acidic diluent, such as a mixture of methanol and aqueous hydrochloric acid. Compounds having a pyridyl group can be readily prepared by using, for example, β-(2-pyridyl)-, β-(3-pyridyl)- or β-(4- pyridyl)-L-alanine derivatives in the above-described coupling reactions.
Additionally, when the R5 substiment of a compound of formula I or an intermediate thereof contains a primary or secondary amino group, such amino groups can be further derivatized either before or after the above coupling reactions to provide, by way of example, amides, sulfonamides, ureas, thioureas, carbamates, secondary or tertiary amines and the like. Compounds having a primary amino group on the R5 substiment may be prepared, for example, by reduction of the corresponding nitro compound as described above. Alternatively, such compounds can be prepared by using an amino acid derivative of formula VI derived from lysine, and the like in the above-described coupling reactions. By way of illustration, a compound of formula I or an intermediate thereof having a substiment containing a primary or secondary amino group, such as where R5 is a 4-aminobutyl group, can be readily N-acylated using conventional acylating reagents and conditions to provide the corresponding amide. This acylation reaction is typically conducted by treating the amino compound with at least one equivalent, preferably about 1.1 to about 1.2 equivalents, of a carboxylic acid in the presence of a coupling reagent such as a carbodumide, BOP reagent (benzotriazol-1-yloxy- tris(dimethylamino)phosphonium hexafluorophosphonate) and the like, in an inert diluent, such as dichloromethane, chloroform, acetonitrile, tetrahydromran, N,N-dimethylformamide and the like, at a temperamre ranging from about 0°C to about 37 °C for about 4 to about 24 hours. Preferably, a promoter, such as N-hydroxysuccinimide, 1- hydroxybenzotriazole and the like, is used to facilitate the acylation reaction. Examples of carboxylic acids suitable for use in this reaction include, but are not limited to, N-tert-butyloxycarbonylglycine, N-tert-butyloxycarbonyl-L- phenylalanine, N-tert-butyloxycarbonyl-L-aspartic acid benzyl ester, benzoic acid, N-tert-butyloxycarbonylisonipecotic acid, N-methylisonipecotic acid, N-tert-butyloxycarbonylnipecotic acid, N-tert-butyloxycarbonyl-L- tetrahydroisoquinoline-3-carboxylic acid, N-(toluene-4-sulfonyl)-L-proline and the like.
Alternatively, a compound of formula I or an intermediate thereof containing a primary or secondary amino group can be N-acylated using an acyl halide or a carboxylic acid anhydride to form the corresponding amide.
This reaction is typically conducted by contacting the amino compound with at least one equivalent, preferably about 1.1 to about 1.2 equivalents, of the acyl halide or carboxylic acid anhydride in an inert diluent, such as dichloromethane, at a temperamre ranging from about of about -70 °C to about 40°C for about 1 to about 24 hours. If desired, an acylation catalyst such as 4-(N,N-dimethylamino)pyridine may be used to promote the acylation reaction. The acylation reaction is preferably conducted in the presence of a suitable base to scavenge the acid generated during the reaction. Suitable bases include, by way of example, tertiary amines, such as triethylamine, diisopropylethylamme, N-methylmorpholine and the like.
Alternatively, the reaction can be conducted under Schotten-Baumann-type conditions using aqueous alkali, such as sodium hydroxide and the like.
Examples of acyl halides and carboxylic acid anhydrides suitable for use in this reaction include, but are not limited to, 2-methylpropionyl chloride, trimethylacetyl chloride, phenylacetyl chloride, benzoyl chloride, 2-bromobenzoyl chloride, 2-methylbenzoyl chloride, 2- trifluoromethylbenzoyl chloride, isonicotinoyl chloride, nicotinoyl chloride, picolinoyl chloride, acetic anhydride, succinic anhydride, and the like. Carbamyl chlorides, such as N,N-dimethylcarbamyl chloride, N,N- diethylcarbamyl chloride and the like, can also be used in this reaction to provide ureas. Similarly, dicarbonates, such as di-tert-butyl dicarbonate, may be employed to provide carbamates.
In a similar manner, a compound of formula I or an intermediate thereof containing a primary or secondary amino group may be N-sulfonated to form a sulfonamide using a sulfonyl halide or a sulfonic acid anhydride. Sulfonyl halides and sulfonic acid anhydrides suitable for use in this reaction include, but are not limited to, methanesulfonyl chloride, chloromethanesulfonyl chloride, p-toluenesulfonyl chloride, trifluoromethanesulfonic anhydride, and the like. Similarly, sulfamoyl chlorides, such as dimethylsulfamoyl chloride, can be used to provide sulfamides (e.g. , > Ν-SO2-Ν < ) . Additionally, a primary and secondary amino group present on a substiment of a compound of formula I/IA or an intermediate thereof can be reacted with an isocyanate or a thioisocyanate to give a urea or thiourea, respectively. This reaction is typically conducted by contacting the amino compound with at least one equivalent, preferably about 1.1 to about 1.2 equivalents, of the isocyanate or thioisocyanate in an inert diluent, such as toluene and the like, at a temperamre ranging from about 24 °C to about 37 °C for about 12 to about 24 hours. The isocyanates and thioisocyanates used in this reaction are commercially available or can be prepared from commercially available compounds using well-known synthetic procedures. For example, isocyanates and thioisocyanates are readily prepared by reacting the appropriate amine with phosgene or thiophosgene. Examples of isocyanates and thioisocyanates suitable for use in this reaction include, but are not limited to, ethyl isocyanate, /j-propyl isocyanate, 4-cyanophenyl isocyanate, 3-methoxyphenyl isocyanate, 2-phenylethyl isocyanate, methyl thioisocyanate, ethyl thioisocyanate, 2-phenylethyl thioisocyanate, 3- phenylpropyl thioisocyanate, 3-(N,N-diethylamino)propyl thioisocyanate, phenyl thioisocyanate, benzyl thioisocyanate, 3-pyridyl thioisocyanate, fluorescein isothiocyanate (isomer I) and the like.
Furthermore, when a compound of formula I/IA or an intermediate thereof contains a primary or secondary amino group, the amino group can be reductively alkylated using aldehydes or ketones to form a secondary or tertiary amino group. This reaction is typically conducted by contacting the amino compound with at least one equivalent, preferably about 1.1 to about
1.5 equivalents, of an aldehyde or ketone and at least one equivalent based on the amino compound of a metal hydride reducing agent, such as sodium cyanoborohydride, in an inert diluent, such as methanol, tetrahydrofuran, mixmres thereof and the like, at a temperamre ranging from about 0°C to about 50 °C for about 1 to about 72 hours. Aldehydes and ketones suitable for use in this reaction include, by way of example, benzaldehyde, 4- chlorobenzaldehyde, valeraldehyde, and the like.
In a similar manner, when a compound of formula I/IA or an intermediate thereof has a substiment containing a hydroxyl group, the hydroxyl group can be further modified or derivatized either before or after the above coupling reactions to provide, by way of example, ethers, carbamates and the like. Compounds having a hydroxyl group on, e.g. , the R3 substituent, for example, can be prepared using an amino acid derivative of formula VI derived from tyrosine and the like in the above-described reactions.
By way of example, a compound of formula I/IA or an intermediate thereof having a substiment containing a hydroxyl group, such as where R3 is a (4-hydroxyphenyl)methyl group, can be readily ( -alkylated to form ethers. This O-alkylation reaction is typically conducted by contacting the hydroxy compound with a suitable alkali or alkaline earth metal base, such as potassium carbonate, in an inert diluent, such as acetone, 2-butanone and the like, to form the alkali or alkaline earth metal salt of the hydroxyl group. This salt is generally not isolated, but is reacted in situ with at least one equivalent of an alkyl or substimted alkyl halide or sulfonate, such as an alkyl chloride, bromide, iodide, mesylate or tosylate, to afford the ether. Generally, this reaction is conducted at a temperamre ranging from about 60 °C to about 150°C for about 24 to about 72 hours. Preferably, a catalytic amount of sodium or potassium iodide is added to the reaction mixmre when an alkyl chloride or bromide is employed in the reaction.
Examples of alkyl or substimted alkyl halides and sulfonates suitable for use in this reaction include, but are not limited to, tert-butyl bromoacetate, N-tert-butyl chloroacetamide, 1-bromoethylbenzene, ethyl α- bromophenylacetate, 2-(N-ethyl-N-phenylamino)ethyl chloride, 2-(N,N- ethylamino)ethyl chloride, 2-(N,N-diisopropylamino)ethyl chloride, 2-(N,N- dibenzylamino)ethyl chloride, 3-(N,N-ethylamino)propyl chloride, 3-(N- benzyl-N-methylamino)propyl chloride, N-(2-chloroethyl)morpholine, 2- (hexamethyleneimino)ethyl chloride, 3-(N-methylpiperazine)propyl chloride, l-(3-chlorophenyl)-4-(3-chloropropyl)piperazine, 2-(4-hydroxy-4- phenylpiperidine)ethyl chloride , N-tert-butyloxycarbonyl-3-piperidinemethyl tosylate, and the like.
Alternatively, a hydroxyl group present on a substiment of a compound of formula I or an intermediate thereof can be Oalkylating using the Mitsunobu reaction. In this reaction, an alcohol, such as 3-(N,N- dimethylamino)-l-propanol and the like, is reacted with about 1.0 to about 1.3 equivalents of triphenylphosphine and about 1.0 to about 1.3 equivalents of diethyl azodicarboxylate in an inert diluent, such as tetrahydrofuran, at a temperamre ranging from about -10°C to about 5°C for about 0.25 to about 1 hour. About 1.0 to about 1.3 equivalents of a hydroxy compound, such as N-tert-butyltyrosine methyl ester, is then added and the reaction mixmre is stirred at a temperamre of about 0°C to about 30 °C for about 2 to about 48 hours to provide the O-alkylated product.
In a similar manner, a compound of formula I or an intermediate thereof containing a aryl hydroxy group can be reacted with an aryl iodide to provide a diary 1 ether. Generally, this reaction is conducted by forming the alkali metal salt of the hydroxyl group using a suitable base, such as sodium hydride, in an inert diluent such as xylenes at a temperamre of about -25 °C to about 10°C. The salt is then treated with about 1.1 to about 1.5 equivalents of cuprous bromide dimethyl sulfide complex at a temperamre ranging from about 10°C to about 30°C for about 0.5 to about 2.0 hours, followed by about 1.1 to about 1.5 equivalents of an aryl iodide, such as sodium 2-iodobenzoate and the like. The reaction is then heated to about 70 °C to about 150°C for about 2 to about 24 hours to provide the diary 1 ether.
Additionally, a hydroxy -containing compound can also be readily derivatized to form a carbamate. In one method for preparing such carbamates, a hydroxy compound of formula I or an intermediate thereof is contacted with about 1.0 to about 1.2 equivalents of 4-nitrophenyl chloroformate in an inert diluent, such as dichloromethane, at a temperamre ranging from about -25 °C to about 0°C for about 0.5 to about 2.0 hours. Treatment of the resulting carbonate with an excess, preferably about 2 to about 5 equivalents, of a trialkylamine, such as triethylamine, for about 0.5 to 2 hours, followed by about 1.0 to about 1.5 equivalents of a primary or secondary amine provides the carbamate. Examples of amines suitable for using in this reaction include, but are not limited to, piperazine, 1- methylpiperazine, 1-acetylpiperazine, morpholine, thiomorpholine, pyrrolidine, piperidine and the like.
Alternatively, in another method for preparing carbamates, a hydroxy -containing compound is contacted with about 1.0 to about 1.5 equivalents of a carbamyl chloride in an inert diluent, such as dichloromethane, at a temperamre ranging from about 25 °C to about 70 °C for about 2 to about 72 hours. Typically, this reaction is conducted in the presence of a suitable base to scavenge the acid generated during the reaction. Suitable bases include, by way of example, tertiary amines, such as triethylamine, diisopropylethylamme, N-methylmorpholine and the like. Additionally, at least one equivalent (based on the hydroxy compound) of 4- (NN-dimethylamino)pyridine is preferably added to the reaction mixmre to facilitate the reaction. Examples of carbamyl chlorides suitable for use in this reaction include, by way of example, dimethylcarbamyl chloride, diethylcarbamyl chloride and the like.
Likewise, when a compound of formula I/IA or an intermediate thereof contains a primary or secondary hydroxyl group, such hydroxyl groups can be readily converted into a leaving group and displaced to form, for example, amines, sulfides and fluorides. For example, derivatives of 4- hydroxy-L-proline can be converted into the corresponding 4-amino, 4-thio or 4-fluoro-L-proline derivatives via nucleophilic displacement of the derivatized hydroxyl group. Generally, when a chiral compound is employed in these reactions, the stereochemistry at the carbon atom attached to the derivatized hydroxyl group is typically inverted.
These reactions are typically conducted by first converting the hydroxyl group into a leaving group, such as a tosylate, by treatment of the hydroxy compound with at least one equivalent of a sulfonyl halide, such as p-toluenesulfonyl chloride and the like, in pyridine. This reaction is generally conducted at a temperamre of from about 0°C to about 70 °C for about 1 to about 48 hours. The resulting tosylate can then be readily displaced with sodium azide, for example, by contacting the tosylate with at least one equivalent of sodium azide in an inert diluent, such as a mixmre of N,N-dimethylformamide and water, at a temperamre ranging from about 0°C to about 37 °C for about 1 to about 12 hours to provide the corresponding azido compound. The azido group can then be reduced by, for example, hydrogenation using a palladium on carbon catalyst to provide the amino (-
ΝH2) compound.
Similarly, a tosylate group can be readily displaced by a thiol to form a sulfide. This reaction is typically conducted by contacting the tosylate with at least one equivalent of a thiol, such as thiophenol, in the presence of a suitable base, such as l,8-diazabicyclo[5.4.0]undec-7-ene (DBU), in an inert diluent, such as N,N-dimethylformamide, at a temperamre of from about 0°C to about 37 °C for about 1 to about 12 hours to provide the sulfide. Additionally, treatment of a tosylate with morpholinosulfur trifluoride in an inert diluent, such as dichloromethane, at a temperamre ranging from about
0°C to about 37 °C for about 12 to about 24 hours affords the corresponding fluoro compound.
Furthermore, a compound of formula I/IA or an intermediate thereof having a substiment containing an iodoaryl group, for example, when R3 is a (4-iodophenyl)methyl group, can be readily converted either before or after the above coupling reactions into a biaryl compound. Typically, this reaction is conducted by treating the iodoaryl compound with about 1.1 to about 2 equivalents of an arylzinc iodide, such as 2- (methoxycarbonyl)phenylzinc iodide, in the presence of a palladium catalyst, such as palladium tetra(triphenylphosphine), in an inert diluent, such as tetrahydrofuran, at a temperamre ranging from about 24°C to about 30°C until reaction completion. This reaction is further described, for example, in Rieke, J. Org. Chem. 1991, 56, 1445.
In some cases, the compounds of formula I/IA or intermediates thereof may contain substiments having one or more sulfur atoms. Such sulfur atoms will be present, for example, when the amino acid of formula II employed in the above reactions is derived from L-thiazolidine-4-carboxylic acid, L-(5,5-dimethyl)thiazolidine-4-carboxylic acid, L-thiamorpholine-3- carboxylic acid and the like. When present, such sulfur atoms can be oxidized either before or after the above coupling reactions to provide a sulfoxide or sulfone compound using conventional reagents and reaction conditions. Suitable reagents for oxidizing a sulfide compound to a sulfoxide include, by way of example, hydrogen peroxide, 3-chloroperoxybenzoic acid (MCPBA), sodium periodate and the like. The oxidation reaction is typically conducted by contacting the sulfide compound with about 0.95 to about 1.1 equivalents of the oxidizing reagent in an inert diluent, such as dichloromethane, at a temperamre ranging from about -50°C to about 75 °C for about 1 to about 24 hours. The resulting sulfoxide can then be further oxidized to the corresponding sulfone by contacting the sulfoxide with at least one additional equivalent of an oxidizing reagent, such as hydrogen peroxide, MCPBA, potassium permanganate and the like. Alternatively, the sulfone can be prepared directly by contacting the sulfide with at least two equivalents, and preferably an excess, of the oxidizing reagent. Such reactions are described further in March, "Advanced Organic Chemistry" , 4th Ed. , pp. 1201-1202, Wiley publisher, 1992.
As described above, the compounds of formula I having an R2 substiment other an hydrogen can be prepared using an N-substituted amino acid of formula II, such as sarcosine, N-methyl-L-phenylalanine and the like, in the above-described coupling reactions. Alternatively, such compounds can be prepared by N-alkylation of a sulfonamide of formula I or IV (where R2 is hydrogen) using conventional synthetic procedures. Typically, this N- alkylation reaction is conducted by contacting the sulfonamide with at least one equivalent, preferably 1.1 to 2 equivalents, of an alkyl or substimted alkyl halide in the presence of a suitable base, such as potassium carbonate, in an inert diluent, such as acetone, 2-butanone and the like, at a temperamre ranging from about 25 °C to about 70 °C for about 2 to about 48 hours. Examples of alkyl or substimted alkyl halides suitable for use in this reaction include, but are not limited to, methyl iodide, and the like.
Additionally, the sulfonamides of formula I or IV wherein R2 is hydrogen and R1 is a 2-alkoxycarbonylaryl group can be intramolecularly cyclized to form l,2-benzisothiazol-3-one derivatives or analogues thereof. This reaction is typically conducted by treating a sulfonamide, such as N-(2- methoxycarbonylphenylsulfonyl)glycine-L-phenylalanine benzyl ester, with about 1.0 to 1.5 equivalents of a suitable base, such as an alkali metal hydride, in a inert diluent, such as tetrahydrofuran, at a temperamre ranging from about 0°C to about 30 °C for about 2 to about 48 hours to afford the cyclized 1 ,2-benzisothiazol-3-one derivative.
Lastly, the compounds of formula I where Q is -C(S)ΝR7- are can prepared by using an amino thionoacid derivative in place of amino acid II in the above described synthetic procedures. Such amino thionoacid derivatives can be prepared by the procedures described in Shalaky, et al., J. Org. Chem. , 61:9045-9048 (1996) and Brain, et al., J. Org. Chem., 62: 3808- 3809 (1997) and references cited therein.
Pharmaceutical Formulations
When employed as pharmaceuticals, the compounds of formula I and IA are usually administered in the form of pharmaceutical compositions. These compounds can be administered by a variety of routes including oral, rectal, transdermal, subcutaneous, intravenous, intramuscular, and intranasal. These compounds are effective as both injectable and oral compositions. Such compositions are prepared in a manner well known in the pharmaceutical art and comprise at least one active compound.
This invention also includes pharmaceutical compositions which contain, as the active ingredient, one or more of the compounds of formula I and I A above associated with pharmaceutically acceptable carriers. In making the compositions of this invention, the active ingredient is usually mixed with an excipient, diluted by an excipient or enclosed within such a carrier which can be in the form of a capsule, sachet, paper or other container. When the excipient serves as a diluent, it can be a solid, semi- solid, or liquid material, which acts as a vehicle, carrier or medium for the active ingredient. Thus, the compositions can be in the form of tablets, pills, powders, lozenges, sachets, cachets, elixirs, suspensions, emulsions, solutions, syrups, aerosols (as a solid or in a liquid medium), ointments containing, for example, up to 10% by weight of the active compound, soft and hard gelatin capsules, suppositories, sterile injectable solutions, and sterile packaged powders.
In preparing a formulation, it may be necessary to mill the active compound to provide the appropriate particle size prior to combining with the other ingredients. If the active compound is substantially insoluble, it ordinarily is milled to a particle size of less than 200 mesh. If the active compound is substantially water soluble, the particle size is normally adjusted by milling to provide a substantially uniform distribution in the formulation, e.g. about 40 mesh.
Some examples of suitable excipients include lactose, dextrose, sucrose, sorbitol, mannitol, starches, gum acacia, calcium phosphate, alginates, tragacanth, gelatin, calcium silicate, microcrystalline cellulose, polyvinylpyrrolidone, cellulose, water, syrup, and methyl cellulose. The formulations can additionally include: lubricating agents such as talc, magnesium stearate, and mineral oil; wetting agents; emulsifying and suspending agents; preserving agents such as methyl- and propylhydroxy- benzoates; sweetening agents; and flavoring agents. The compositions of the invention can be formulated so as to provide quick, sustained or delayed release of the active ingredient after administration to the patient by employing procedures known in the art.
The compositions are preferably formulated in a unit dosage form, each dosage containing from about 5 to about 100 mg, more usually about 10 to about 30 mg, of the active ingredient. The term "unit dosage forms" refers to physically discrete units suitable as unitary dosages for human subjects and other mammals, each unit containing a predetermined quantity of active material calculated to produce the desired therapeutic effect, in association with a suitable pharmaceutical excipient.
The active compound is effective over a wide dosage range and is generally administered in a pharmaceutically effective amount. It, will be understood, however, that the amount of the compound acmally administered will be determined by a physician, in the light of the relevant circumstances, including the condition to be treated, the chosen route of administration, the actual compound administered, the age, weight, and response of the individual patient, the severity of the patient's symptoms, and the like.
For preparing solid compositions such as tablets, the principal active ingredient is mixed with a pharmaceutical excipient to form a solid preformulation composition containing a homogeneous mixmre of a compound of the present invention. When referring to these preformulation compositions as homogeneous, it is meant that the active ingredient is dispersed evenly throughout the composition so that the composition may be readily subdivided into equally effective unit dosage forms such as tablets, pills and capsules. This solid preformulation is then subdivided into unit dosage forms of the type described above containing from, for example, 0.1 to about 500 mg of the active ingredient of the present invention.
The tablets or pills of the present invention may be coated or otherwise compounded to provide a dosage form affording the advantage of prolonged action. For example, the tablet or pill can comprise an inner dosage and an outer dosage component, the latter being in the form of an envelope over the former. The two components can separated by enteric layer which serves to resist disintegration in the stomach and permit the inner component to pass intact into the duodenum or to be delayed in release. A variety of materials can be used for such enteric layers or coatings, such materials including a number of polymeric acids and mixmres of polymeric acids with such materials as shellac, cetyl alcohol, and cellulose acetate.
The liquid forms in which the novel compositions of the present invention may be incorporated for administration orally or by injection include aqueous solutions suitably flavored syrups, aqueous or oil suspensions, and flavored emulsions with edible oils such as cottonseed oil, sesame oil, coconut oil, or peanut oil, as well as elixirs and similar pharmaceutical vehicles.
Compositions for inhalation or insufflation include solutions and suspensions in pharmaceutically acceptable, aqueous or organic solvents, or mixmres thereof, and powders. The liquid or solid compositions may contain suitable pharmaceutically acceptable excipients as described supra. Preferably the compositions are administered by the oral or nasal respiratory route for local or systemic effect. Compositions in preferably pharmaceutically acceptable solvents may be nebulized by use of inert gases. Nebulized solutions may be breathed directly from the nebulizing device or the nebulizing device may be attached to a face masks tent, or intermittent positive pressure breathing machine. Solution, suspension, or powder compositions may be administered, preferably orally or nasally, from devices which deliver the formulation in an appropriate manner.
The following formulation examples illustrate the pharmaceutical compositions of the present invention. Formulation Example 1
Hard gelatin capsules containing the following ingredients are prepared:
Quantity Ingredient (mg/capsule)
Active Ingredient 30.0
Starch 305.0
Magnesium stearate 5.0
The above ingredients are mixed and filled into hard gelatin capsules in 340 mg quantities.
Formulation Example 2 A tablet formula is prepared using the ingredients below:
Quantity Ingredient (mg/tablef)
Active Ingredient 25.0 Cellulose, microcrystalline 200.0
Colloidal silicon dioxide 10.0
Stearic acid 5.0
The components are blended and compressed to form tablets, each weighing 240 mg.
Formulation Example 3 A dry powder inhaler formulation is prepared containing the following components:
Ingredient Weight %
Active Ingredient 5
Lactose 95 The active mixmre is mixed with the lactose and the mixmre is added to a dry powder inhaling appliance.
Formulation Example 4 Tablets, each containing 30 mg of active ingredient, are prepared as follows:
Quantity Ingredient (mg/tablet)
Active Ingredient 30.0 mg
Starch 45.0 mg
Microcrystalline cellulose 35.0 mg Polyvinylpyrrolidone
(as 10% solution in water) 4.0 mg Sodium carboxymethyl starch 4.5 mg
Magnesium stearate 0.5 mg
Talc 1.0 mg
Total 120 mg
The active ingredient, starch and cellulose are passed through a No.
20 mesh U.S. sieve and mixed thoroughly. The solution of polyvinylpyrrolidone is mixed with the resultant powders, which are then passed through a 16 mesh U.S. sieve. The granules so produced are dried at 50° to 60 °C and passed through a 16 mesh U.S. sieve. The sodium carboxymethyl starch, magnesium stearate, and talc, previously passed through a No. 30 mesh U.S. sieve, are then added to the granules which, after mixing, are compressed on a tablet machine to yield tablets each weighing 150 mg.
Formulation Example 5 Capsules, each containing 40 mg of medicament are made as follows:
Quantity Ingredient (mg/capsule)
Active Ingredient 40.0 mg Starch 109.0 mg
Magnesium stearate 1.0 mg
Total 150.0 mg The active ingredient, cellulose, starch, an magnesium stearate are blended, passed through a No. 20 mesh U.S. sieve, and filled into hard gelatin capsules in 150 mg quantities.
Formulation Example 6
Suppositories, each containing 25 mg of active ingredient are made as follows:
Ingredient Amount
Active Ingredient 25 mg
Samrated fatty acid glycerides to 2,000 mg
The active ingredient is passed through a No. 60 mesh U.S. sieve and suspended in the samrated fatty acid glycerides previously melted using the minimum heat necessary. The mixmre is then poured into a suppository mold of nominal 2.0 g capacity and allowed to cool.
Formulation Example 7 Suspensions, each containing 50 mg of medicament per 5.0 ml dose are made as follows:
Ingredient Amount
Active Ingredient 50.0 mg
Xanthan gum 4.0 mg
Sodium carboxymethyl cellulose (11 %)
Microcrystalline cellulose (89%) 50.0 mg
Sucrose 1.75 g
Sodium benzoate 10.0 mg
Flavor and Color q.v.
Purified water to 5.0 ml The medicament, sucrose and xanthan gum are blended, passed through a No. 10 mesh U.S. sieve, and then mixed with a previously made solution of the microcrystalline cellulose and sodium carboxymethyl cellulose in water. The sodium benzoate, flavor, and color are diluted with some of the water and added with stirring. Sufficient water is then added to produce the required volume.
Formulation Example 8
Quantity Ingredient (mg/capsule)
Active Ingredient 15.0 mg
Starch 407.0 mg
Magnesium stearate 3.0 mg
Total 425.0 mg
The active ingredient, cellulose, starch, and magnesium stearate are blended, passed through a No. 20 mesh U.S. sieve, and filled into hard gelatin capsules in 560 mg quantities.
Formulation Example 9 An intravenous formulation may be prepared as follows:
Ingredient Quantity
Active Ingredient 250.0 mg
Isotonic saline 1000 ml
Formulation Example 10 A topical formulation may be prepared as follows: Ingredient Quantity
Active Ingredient 1-10 g
Emulsifying Wax 30 g Liquid Paraffin 20 g
White Soft Paraffin to 100 g
The white soft paraffin is heated until molten. The liquid paraffin and emulsifying wax are incorporated and stirred until dissolved. The active ingredient is added and stirring is continued until dispersed. The mixmre is then cooled until solid.
Another preferred formulation employed in the methods of the present invention employs transdermal delivery devices ("patches"). Such transdermal patches may be used to provide continuous or discontinuous infusion of the compounds of the present invention in controlled amounts. The construction and use of transdermal patches for the delivery of pharmaceutical agents is well known in the art. See, e.g.. U.S. Patent
5,023,252, issued June 11, 1991, herein incorporated by reference. Such patches may be constructed for continuous, pulsatile, or on demand delivery of pharmaceutical agents.
When it is desirable or necessary to introduce the pharmaceutical composition to the brain, either directly or indirectly. Direct techniques usually involve placement of a drug delivery catheter into the host's ventricular system to bypass the blood-brain barrier. One such implantable delivery system used for the transport of biological factors to specific anatomical regions of the body is described in U.S. Patent 5,011,472 which is herein incorporated by reference.
Indirect techniques, which are generally preferred, usually involve formulating the compositions to provide for drug latentiation by the conversion of hydrophilic drugs into lip id-soluble drugs. Latentiation is generally achieved through blocking of the hydroxy, carbonyl, sulfate, and primary amine groups present on the drug to render the drug more lipid soluble and amenable to transportation across the blood-brain barrier. Alternatively, the delivery of hydrophilic drugs may be enhanced by intra-arterial infusion of hypertonic solutions which can transiently open the blood-brain barrier.
Utility
The compounds of this invention can be employed to bind VLA-4 (c^βj integrin) in biological samples and, accordingly have utility in, for example, assaying such samples for VLA-4. In such assays, the compounds can be bound to a solid support and the VLA-4 sample added thereto. The amount of VLA-4 in the sample can be determined by conventional methods such as use of a sandwich ELISA assay. Alternatively, labeled VLA-4 can be used in a competitive assay to measure for the presence of VLA-4 in the sample. Other suitable assays are well known in the art.
In addition, certain of the compounds of this invention inhibit, in vivo, adhesion of leukocytes to endothelial cells mediated by VLA-4 and, accordingly, can be used in the treatment of diseases mediated by VLA-4. Such diseases include inflammatory diseases in mammalian patients such as asthma, Alzheimer's disease, atherosclerosis, AIDS dementia, diabetes (including acute juvenile onset diabetes), inflammatory bowel disease (including ulcerative colitis and Crohn 's disease), multiple sclerosis, rheumatoid arthritis, tissue transplantation, tumor metastasis, meningitis, encephalitis, stroke, and other cerebral traumas, nephritis, retinitis, atopic dermatitis, psoriasis, myocardial ischemia and acute leukocyte-mediated lung injury such as that which occurs in adult respiratory distress syndrome.
The biological activity of the compounds identified above may be assayed in a variety of systems. For example, a compound can be immobilized on a solid surface and adhesion of cells expressing VLA-4 can be measured. Using such formats, large numbers of compounds can be screened. Cells suitable for this assay include any leukocytes known to express VLA-4 such as T cells, B cells, monocytes, eosinophils, and basophils. A number of leukocyte cell lines can also be used, examples include Jurkat and U937.
The test compounds can also be tested for the ability to competitively inhibit binding between VLA-4 and VCAM-1, or between VLA-4 and a labeled compound known to bind VLA-4 such as a compound of this invention or antibodies to VLA-4. In these assays, the VCAM-1 can be immobilized on a solid surface. VCAM-1 may also be expressed as a recombinant fusion protein having an Ig tail (e.g., IgG) so that binding to VLA-4 may be detected in an immunoassay. Alternatively, VCAM-1 expressing cells, such as activated endothelial cells or VCAM-1 transfected fibroblasts can be used. For assays to measure the ability to block adhesion to brain endothelial cells, the assays described in International Patent Application Publication No. WO 91/05038 are particularly preferred. This application is incorporated herein by reference in its entirety.
Many assay formats employ labelled assay components. The labelling systems can be in a variety of forms. The label may be coupled directly or indirectly to the desired component of the assay according to methods well known in the art. A wide variety of labels may be used. The component may be labelled by any one of several methods. The most common method of detection is the use of autoradiography with 3H, 1251, 35S, 14C, or 32P labelled compounds or the like. Non-radioactive labels include ligands which bind to labelled antibodies, fluorophores, chemiluminescent agents, enzymes and antibodies which can serve as specific binding pair members for a labelled ligand. The choice of label depends on sensitivity required, ease of conjugation with the compound, stability requirements, and available instrumentation.
Appropriate in vivo models for demonstrating efficacy in treating inflammatory responses include EAE (experimental autoimmune encephalomyelitis) in mice, rats, guinea pigs or primates, as well as other inflammatory models dependent upon α4 integrins.
Compounds having the desired biological activity may be modified as necessary to provide desired properties such as improved pharmacological properties (e.g. , in vivo stability, bio-availability), or the ability to be detected in diagnostic applications. For instance, inclusion of one or more D-amino acids in the sulfonamides of this invention typically increases in vivo stability. Stability can be assayed in a variety of ways such as by measuring the half-life of the proteins during incubation with peptidases or human plasma or serum. A number of such protein stability assays have been described (see, e.g., Verhoef, et al., Eur. J. Drug Metab. Pharmacokinet., 1990, 15 2):83-93).
For diagnostic purposes, a wide variety of labels may be linked to the compounds, which may provide, directly or indirectly, a detectable signal. Thus, the compounds of the subject invention may be modified in a variety of ways for a variety of end purposes while still retaining biological activity. In addition, various reactive sites may be introduced at the terminus for linking to particles, solid substrates, macromolecules, or the like.
Labeled compounds can be used in a variety of in vivo or in vitro applications. A wide variety of labels may be employed, such as radionuclides (e.g., gamma-emitting radioisotopes such as technetium-99 or indium-Ill), fluorescers (e.g., fluorescein), enzymes, enzyme substrates, enzyme cofactors, enzyme inhibitors, chemiluminescent compounds, bioluminescent compounds, and the like. Those of ordinary skill in the art will know of other suitable labels for binding to the complexes, or will be able to ascertain such using routine experimentation. The binding of these labels is achieved using standard techniques common to those of ordinary skill in the art.
In vitro uses include diagnostic applications such as monitoring inflammatory responses by detecting the presence of leukocytes expressing VLA-4. The compounds of this invention can also be used for isolating or labeling such cells. In addition, as mentioned above, the compounds of the invention can be used to assay for potential inhibitors of VLA-4/VCAM-1 interactions.
For in vivo diagnostic imaging to identify, e.g., sites of inflammation, radioisotopes are typically used in accordance with well known techniques. The radioisotopes may be bound to the peptide either directly or indirectly using intermediate functional groups. For instance, chelating agents such as diethylenetriaminepentacetic acid (DTP A) and ethylenediaminetetraacetic acid (EDTA) and similar molecules have been used to bind proteins to metallic ion radioisotopes.
The complexes can also be labeled with a paramagnetic isotope for purposes of in vivo diagnosis, as in magnetic resonance imaging (MRI) or electron spin resonance (ESR), both of which were well known. In general, any conventional method for visualizing diagnostic imaging can be used. Usually gamma- and positron-emitting radioisotopes are used for camera imaging and paramagnetic isotopes are used for MRI. Thus, the compounds can be used to monitor the course of amelioration of an inflammatory response in an individual. By measuring the increase or decrease in lymphocytes expressing VLA-4 it is possible to determine whether a particular therapeutic regimen aimed at ameliorating the disease is effective.
The pharmaceutical compositions of the present invention can be used to block or inhibit cellular adhesion associated with a number of diseases and disorders. For instance, a number of inflammatory disorders are associated with integrins or leukocytes. Treatable disorders include, e.g., transplantation rejection (e.g. , allograft rejection), Alzheimer's disease, atherosclerosis, AIDS dementia, diabetes (including acute juvenile onset diabetes), retinitis, cancer metastases, rheumatoid arthritis, acute leukocyte-mediated lung injury (e.g., adult respiratory distress syndrome), asthma, nephritis, and acute and chronic inflammation, including atopic dermatitis, psoriasis, myocardial ischemia, and inflammatory bowel disease (including Crohn' s disease and ulcerative colitis). In preferred embodiments the pharmaceutical compositions are used to treat inflammatory brain disorders, such as multiple sclerosis (MS), viral meningitis and encephalitis.
Inflammatory bowel disease is a collective term for two similar diseases referred to as Crohn' s disease and ulcerative colitis. Crohn' s disease is an idiopathic, chronic ulceroconstrictive inflammatory disease characterized by sharply delimited and typically transmural involvement of all layers of the bowel wall by a granulomatous inflammatory reaction. Any segment of the gastrointestinal tract, from the mouth to the anus, may be involved, although the disease most commonly affects the terminal ileum and/or colon. Ulcerative colitis is an inflammatory response limited largely to the colonic mucosa and submucosa. Lymphocytes and macrophages are numerous in lesions of inflammatory bowel disease and may contribute to inflammatory injury. Asthma is a disease characterized by increased responsiveness of the tracheobronchial tree to various stimuli potentiating paroxysmal constriction of the bronchial airways. The stimuli cause release of various mediators of inflammation from IgE-coated mast cells including histamine, eosinophilic and neutrophilic chemotactic factors, leukotrines, prostaglandin and platelet activating factor. Release of these factors recruits basophils, eosinophils and neutrophils, which cause inflammatory injury.
Atherosclerosis is a disease of arteries (e.g., coronary, carotid, aorta and iliac). The basic lesion, the atheroma, consists of a raised focal plaque within the intima, having a core of lipid and a covering fibrous cap.
Atheromas compromise arterial blood flow and weaken affected arteries.
Myocardial and cerebral infarcts are a major consequence of this disease.
Macrophages and leukocytes are recruited to atheromas and contribute to inflammatory injury.
Rheumatoid arthritis is a chronic, relapsing inflammatory disease that primarily causes impairment and destruction of joints. Rheumatoid arthritis usually first affects the small joints of the hands and feet but then may involve the wrists, elbows, ankles and knees. The arthritis results from interaction of synovial cells with leukocytes that infiltrate from the circulation into the synovial lining of the joints. See e.g., Paul, Immunology (3d ed., Raven Press, 1993).
Another indication for the compounds of this invention is in treatment of organ or graft rejection mediated by VLA-4. Over recent years there has been a considerable improvement in the efficiency of surgical techniques for transplanting tissues and organs such as skin, kidney, liver, heart, lung, pancreas and bone marrow. Perhaps the principal outstanding problem is the lack of satisfactory agents for inducing immunotolerance in the recipient to the transplanted allograft or organ. When allogeneic cells or organs are transplanted into a host (i.e., the donor and donee are different individuals from the same species), the host immune system is likely to mount an immune response to foreign antigens in the transplant (host-versus-graft disease) leading to destruction of the transplanted tissue. CD8+ cells, CD4 cells and monocytes are all involved in the rejection of transplant tissues. Compounds of this invention which bind to alpha-4 integrin are useful, inter alia, to block alloantigen-induced immune responses in the donee thereby preventing such cells from participating in the destruction of the transplanted tissue or organ. See, e.g., Paul et al. , Transplant International 9, 420-425 (1996); Georczynski et al. , Immunology 87, 573-580 (1996); Georcyznski et al. , Transplant. Immunol. 3, 55-61 (1995); Yang et al., Transplantation 60, 71-76 (1995); Anderson et al., APMIS 102, 23-27 (1994).
A related use for compounds of this invention which bind to VLA-4 is in modulating the immune response involved in "graft versus host" disease (GVHD). See e.g., Schlegel et al., J. Immunol. 155, 3856-3865 (1995). GVHD is a potentially fatal disease that occurs when immunologically competent cells are transferred to an allogeneic recipient. In this situation, the donor's i munocompetent cells may attack tissues in the recipient.
Tissues of the skin, gut epithelia and liver are frequent targets and may be destroyed during the course of GVHD. The disease presents an especially severe problem when immune tissue is being transplanted, such as in bone marrow transplantation; but less severe GVHD has also been reported in other cases as well, including heart and liver transplants. The therapeutic agents of the present invention are used, inter alia, to block activation of the donor T-cells thereby interfering with their ability to lyse target cells in the host. A further use of the compounds of this invention is inhibiting tumor metastasis. Several tumor cells have been reported to express VLA-4 and compounds which bind VLA-4 block adhesion of such cells to endothelial cells. Steinback et al., Urol. Res. 23, 175-83 (1995); Orosz et al., Int. J. Cancer 60, 867-71 (1995); Freedman et al. , Leuk. Lymphoma 13, 47-52
(1994); Okahara et al. , Cancer Res. 54, 3233-6 (1994).
A further use of the compounds of this invention is in treating multiple sclerosis. Multiple sclerosis is a progressive neurological autoimmune disease that affects an estimated 250,000 to 350,000 people in the United States. Multiple sclerosis is thought to be the result of a specific autoimmune reaction in which certain leukocytes attack and initiate the destruction of myelin, the insulating sheath covering nerve fibers. In an animal model for multiple sclerosis, murine monoclonal antibodies directed against VLA-4 have been shown to block the adhesion of leukocytes to the endothelium, and thus prevent inflammation of the central nervous system and subsequent paralysis in the animals16.
Pharmaceutical compositions of the invention are suitable for use in a variety of drug delivery systems. Suitable formulations for use in the present invention are found in Remington 's Pharmaceutical Sciences, Mace Publishing Company, Philadelphia, PA, 17th ed. (1985).
In order to enhance serum half-life, the compounds may be encapsulated, introduced into the lumen of liposomes, prepared as a colloid, or other conventional techniques may be employed which provide an extended serum half-life of the compounds. A variety of methods are available for preparing liposomes, as described in, e.g., Szoka, et al., U.S. Patent Nos. 4,235,871, 4,501,728 and 4,837,028 each of which is incorporated herein by reference. The amount administered to the patient will vary depending upon what is being administered, the purpose of the administration, such as prophylaxis or therapy, the state of the patient, the manner of administration, and the like. In therapeutic applications, compositions are administered to a patient already suffering from a disease in an amount sufficient to cure or at least partially arrest the symptoms of the disease and its complications. An amount adequate to accomplish this is defined as "therapeutically effective dose. " Amounts effective for this use will depend on the disease condition being treated as well as by the judgment of the attending clinician depending upon factors such as the severity of the inflammation, the age, weight and general condition of the patient, and the like.
The compositions administered to a patient are in the form of pharmaceutical compositions described above. These compositions may be sterilized by conventional sterilization techniques, or may be sterile filtered.
The resulting aqueous solutions may be packaged for use as is, or lyophilized, the lyophilized preparation being combined with a sterile aqueous carrier prior to administration. The pH of the compound preparations typically will be between 3 and 11 , more preferably from 5 to 9 and most preferably from 7 to 8. It will be understood that use of certain of the foregoing excipients, carriers, or stabilizers will result in the formation of pharmaceutical salts.
The therapeutic dosage of the compounds of the present invention will vary according to, for example, the particular use for which the treatment is made, the manner of administration of the compound, the health and condition of the patient, and the judgment of the prescribing physician. For example, for intravenous administration, the dose will typically be in the range of about 20 μg to about 500 μg per kilogram body weight, preferably about 100 μg to about 300 μg per kilogram body weight. Suitable dosage ranges for intranasal administration are generally about 0.1 pg to 1 mg per kilogram body weight. Effective doses can be extrapolated from dose-response curves derived from in vitro or animal model test systems.
The following synthetic and biological examples are offered to illustrate this invention and are not to be construed in any way as limiting the scope of this invention. Unless otherwise stated, all temperatures are in degrees Celsius.
EXAMPLES
In the examples below, the following abbreviations have the following meanings. If an abbreviation is not defined, it has its generally accepted meamng. aq or aq. aqueous
AcOH acetic acid bd broad doublet bm broad multiplet bs broad singlet
Bn benzyl
Boc N-tert-butoxylcarbonyl
Boc2O di-tert-butyl dicarbonate
BOP benzotriazol- 1 -y loxy- tris(dimethylamino)phosphonium hexafluorophosphate
Cbz carbobenzyloxy
CHC13 chloroform
CH2C12 dichloromethane
(COCl)2 oxalyl chloride d doublet dd doublet of doublets dt doublet of triplets
DBU 1 ,8-diazabicyclo[5.4.0]undec-7-ene
DCC 1 ,3-dicyclohexylcarbodiimide
DMAP 4-N,N-dimethylaminopyridine
DME ethylene glycol dimethyl ether
DMF N N-dimethylformamide
DMSO dimethylsulfoxide EDC — l-(3-dimethylaminopropyl)-3- ethylcarbodiimide hydrochloride
Et3N = triethylamine
Et2O = diethyl ether
EtOAc = ethyl acetate
EtOH = ethanol eq or eq. = equivalent
Fmoc = N-(9-fluorenylmethoxycarbonyl)
FmocONSu — N-(9-fluorenylmethoxycarbonyl)- succinimide g = grams h = hour
H2O = water
HBr = hydrobromic acid
HC1 = hydrochloric acid
HOBT = 1-hydroxybenzotriazole hydrate hr = hour
K2CO3 = potassium carbonate
L = liter m = multiplet
MeOH = methanol mg = milligram
MgSO4 = magnesium sulfate mL = milliliter mm = millimeter mM = millimolar mmol = millimol mp = melting point
N = normal
NaCl = sodium chloride
Na2CO3 = sodium carbonate
NaHCO3 = sodium bicarbonate
NaOEt = sodium ethoxide
NaOH = sodium hydroxide
NH4C1 = ammonium chloride
NMM = N-methylmorpholine
Phe = L-phenylalanine
Pro = L-proline psi = pounds per square inch
PtO2 = platinum oxide q = quartet quint. = quintet rt = room temperature s = singlet sat = samrated t triplet t-BuOH tert-butanol
TFA trifluoroacetic acid
THF tetrahydrofuran
TLC or tic thin layer chromatography
Ts tosyl
TsCl tosyl chloride
TsOH tosylate μL microliter
In the examples below, all temperatures are in degrees Celcius (unless otherwise indicated). The following Methods were used to prepare the compounds set forth below as indicated.
Method 1 N-Tosylation Procedure N-Tosylation of the appropriate amino acid was conducted via the method of Cupps, Boutin and Rapoport J. Org. Chem. 1985, 50, 3972.
Method 2 Methyl Ester Preparation Procedure Amino acid methyl esters were prepared using the method of Brenner and Huber Helv. Chim. Acta 1953, 36, 1109.
Method 3 BOP Coupling Procedure The desired dipeptide ester was prepared by the reaction of a suitable Ν- protected amino acid (1 equivalent) with the appropriate amino acid ester or amino acid ester hydrochloride (1 equivalent), benzotriazol-1-yloxy- tris(dimethylamino)phosphonium hexafluorophosphate [BOP] (2.0 equivalent), triethylamine (1.1 equivalent), and DMF. The reaction mixmre was stirred at room temperamre overnight. The crude product is purified flash chromatography to afford the dipeptide ester.
Method 4 Hydrogenation Procedure I
Hydrogenation was performed using 10% palladium on carbon (10% by weight) in methanol at 30 psi overnight. The mixmre was filtered through a pad of Celite and the filtrate concentrated to yield the desired amino compound.
Method 5 Hydrolysis Procedure I To a chilled (0°C) THF/H2O solution (2:1, 5 - 10 mL) of the appropriate ester was added LiOH (or NaOH) (0.95 equivalents). The temperamre was maintained at 0°C and the reaction was complete in 1-3 hours. The reaction mixmre was extracted with ethyl acetate and the aqueous phase was lyophilized resulting in the desired carboxylate salt.
Method 6 Ester Hydrolysis Procedure II
To a chilled (0°C) THF/H2O solution (2:1, 5 - 10 mL) of the appropriate ester was added LiOH (1.1 equivalents). The temperamre was maintained at 0°C and the reaction was complete in 1-3 hours. The reaction mixmre was concentrated and the residue was taken up into H2O and the pH adjusted to 2-3 with aqueous HC1. The product was extracted with ethyl acetate and the combined organic phase was washed with brine, dried over MgSO4, filtered and concentrated to yield the desired acid.
Method 7 Ester Hydrolysis Procedure III The appropriate ester was dissolved in dioxane/H2O (1 : 1) and 0.9 equivalents of 0.5 N NaOH was added. The reaction was stirred for 3-16 hours and than concentrated. The resulting residue was dissolved in H,O and extracted with ethyl acetate. The aqueous phase was lyophilized to yield the desired carboxylate sodium salt.
Method 8 Sulfonylation Procedure I To the appropriately protected aminophenylalanine analog (11.2 mmol), dissolved in methylene chloride (25ml) and cooled to -78 °C was added the desired sulfonyl chloride (12 mmol) followed by dropwise addition of pyridine (2 mL). The solution was allowed to warm to room temperamre and was stirred for 48 hr. The reaction solution was transferred to a 250 mL separatory funnel with methylene chloride (100 mL) and extracted with IN HC1 (50 mL x 3), brine (50 mL), and water (100 mL). The organic phase was dried (MgSO4) and the solvent concentrated to yield the desired product.
Method 9 Reductive Amination Procedure
Reductive amination of Tos-Pro-p-NH2-Phe with the appropriate aldehyde was conducted using acetic acid, sodium triacetoxyborohydride, methylene chloride and the combined mixmre was stirred at room temperamre overnight. The crude product was purified by flash chromatography.
Method 10 BOC Removal Procedure Anhydrous hydrochloride (HC1) gas was bubbled through a methanolic solution of the appropriate Boc-amino acid ester at 0°C for 15 minutes and the reaction mixmre was stirred for three hours. The solution was concentrated to a syrup and dissolved in Et2O and reconcentrated. This procedure was repeated and the resulting solid was placed under high vacuum overnight.
Method 11 rert-Butyl Ester Hydrolysis Procedure I The tert-butyl ester was dissolved in CH2C12 and treated with TFA. The reaction was complete in 1-3 hr at which time the reaction mixmre was concentrated and the residue dissolved in H2O and lyophilized to yield the desired acid.
Method 12 EDC Coupling Procedure I To a CH2C12 solution (5-20 mL) of N-(toluene-4-sulfonyl)-L-proline (1 equivalent), the appropriate amino acid ester hydrochloride (1 equivalent), N-methylmorpholine (1.1-2.2 equivalents) and 1-hydroxybenzotriazole (2 equivalents) were mixed, placed in an ice bath and l-(3- dimethylaminopropyl)-3-ethyl carbodumide (1.1 equivalents) added. The reaction was allowed to rise to room temperamre and stirred overmght. The reaction mixmre was poured into H2O and the organic phase was washed with sat. NaHCO3, brine, dried (MgSO4 or Na2SO4), filtered and concentrated. The crude product was purified by column chromatography.
Method 13
EDC Coupling Procedure II To a DMF solution (5-20 mL) of the appropriate N-protected amino acid (1 equivalent), the appropriated amino acid ester hydrochloride (1 equivalent), Et3N (1.1 equivalents) and 1-hydroxybenzotriazole (2 equivalents) were mixed, placed in an ice batch and l-(3- dimethylaminopropyl)-3-ethyl carbodumide (1.1 equivalents) added. The reaction was allowed to rise to room temperamre and stirred overnight. The reaction mixmre was partitioned between EtOAc and H2O and the organic phase washed with 0.2 N citric acid, H2O, sat. NaHCO3, brine, dried (MgSO4 or Na2SO4), filtered and concentrated. The crude product was purified by column chromatography or preparative TLC.
Method 14 Sulfonylation Procedure II The appropriate sulfonyl chloride was dissolved in CH2C12 and placed in an ice bath. L-Pro-L-Phe-OMe o HC1 (1 equivalent) and Et3N (1.1 equivalent) was added and the reaction allowed to warm to room temperamre and stirred overnight under an atmosphere of nitrogen. The reaction mixmre was concentrated and the residue partitioned between EtOAc and H2O and the organic phase washed with sat. NaHCO3, brine, dried (MgSO4 or
Na2SO4), filtered and concentrated. The crude product was purified by column chromatography or preparative TLC.
Method 15 Sulfonylation Procedure III
To a solution of L-Pro-L-4-(3-dimethylaminopropyloxy)-Phe-OMe [prepared using the procedure described in Method 10] (1 equivalent) in CH2C12 was added Et3N (5 equivalents) followed by the appropriate sulfonyl chloride (1.1 equivalent). The reaction was allowed to warm to room temperamre and stirred overnite under an atmosphere of nitrogen. The mixmre was concentrated, dissolved in EtOAc, washed with sat. NaHCO3 and 0.2 N citric acid. The aqueous phase was made basic with solid NaHCO3 and the product extracted with EtOAc. The organic phase was washed with brine, dried (MgSO4 or Na2SO4), filtered and concentrated. The crude methyl ester was purified by preparative TLC. The corresponding acid was prepared using the procedure described in Method 7.
Method 16 Hydrogenation Procedure II
To a methanol (10 -15 mL) solution of the azlactone, was added NaOAc (1 equivalent) and 10% Pd/C. This mixmre was placed on the hydrogenator at 40 psi H2. After 8 - 16 hours, the reaction mixmre was filtered through a pad of Celite and the filtrate concentrated to yield the dehydrodipeptide methyl ester. The ester was dissolved in dioxane/H2O (5- 10 mL), to which was added 0.5 N NaOH (1.05 equivalents). After stirring for 1- 3 hours, the reaction mix was concentrated and the residue was redissolved in H2O and washed with EtOAc. The aqueous phase was made acidic with 0.2 N HC1 and the product was extracted with EtOAc. The combined organic phase was washed with brine (1 x 5 mL), dried (MgSO4 or Na2SO4), filtered and concentrated to yield the acid as approximately a 1 : 1 mixmre of diastereomers.
Method 17 rert-Butyl Ester Hydrolysis Procedure II
The tert-butyl ester was dissolved in CH2C12 (5 mL) and treated with TFA (5 mL). The reaction was complete in 1-3 hours at which time the reaction mixmre was concentrated and the residue dissolved in H2O and concentrated. The residue was redissolved in H2O and lyophilized to yield the desired product. Example 1
Synthesis of
N-(Toluene-4-sulfonyl)-L-prolyI-L- aspartic Acid 4-tert- tyϊ Ester
N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to β-tert-butyl L- aspartic acid methyl ester hydrochloride using the procedure described in
Method 3. The title compound was prepared, via hydrolysis of the methyl ester using LiOH in THF/water, as a solid, mp = 153-155°C. ΝMR data was as follows:
Η ΝMR (CDC13): δ = 7.76 (d, 2H, J = 8.2 Hz), 7.73 (s, IH), 7.36 (d, 2H, J = 8.0 Hz), 4.82 (m, IH), 4.14 (m, IH), 3.52 (m, IH), 3.21 (m, IH), 3.00 (dd, IH, / = 4.8, 16.9 Hz), 2.84 (dd, IH, J = 5.0, 16.9 Hz), 2.45 (s, 3H), 2.14 (m, IH), 1.77-1.50 (3H), 1.47 (s, 9H). 13C ΝMR (CDC13): δ = 174.5, 172.3, 170.2, 145.0, 133.5, 130.6,
128.5, 82.8, 62.7, 50.3, 49.7, 37.9, 30.7, 28.6, 25.0, 22.2. Mass Spectroscopy: FAB m e 441 (M+H).
Example 2 Synthesis of
N-(Toluene-4-sulfonyl)-L-prolyI-L-asparagine
N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to L-asparagine tert-butyl ester hydrochloride using the procedure described in Method 3. The title compound was prepared, via cleavage of the tert-butyl ester using trifluoroacetic acid in CH2C12, to provide a solid, mp = 178-180°C. ΝMR data was as follows:
Η ΝMR (DMSO-c ): δ = 12.6 (s, IH), 8.15 (d, 2H, J = 8.0 Hz), 7.75 (d, 2H, / = 8.2 Hz), 7.43 (d, 2H, J = 8.4 Hz), 7.40 (bs, IH), 6.95 (bs, IH), 4.50 (m, IH), 4.15 (dd, IH, J = 2.8, 8.5 Hz), 3.34 (m, IH), 3.12 (m,
IH), 2.53 (m, 2H), 2.41 (s, 3H), 1.76 (m, 2H), 1.50 (m, 2H). 13C NMR (DMSO-c ,): δ = 172.8, 171.7, 171.2, 144.0, 134.3, 130.2, 127.9, 61.7, 49.3, 49.1, 36.9, 30.8, 24.2, 21.4. Mass Spectroscopy: FAB m/e 384 (M+H).
Example 3
Synthesis of
N-(Toluene-4-sulfonyl)-L-prolyl-
Ne-(tørM)utoxycarbonyl)-L-lysine
N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to Ne-Boc-lysine methyl ester hydrochloride using the procedure described in Method 3. The title compound was prepared via hydrolysis of the methyl ester using LiOH in THF/ water.
ΝMR data was as follows: Η ΝMR (CDC13): δ = 7.77 (d, 2H, J = 8.2 Hz), 7.56 (m, IH), 7.35
(d, 2H, J = 8.0 Hz), 4.77 (bs, IH), 4.57 (m, IH), 4.15 (m, IH), 3.57 (m, IH), 3.20 (m, IH), 3.10 (m, 2H), 2.44 (s, 3H), 2.13 (m, IH), 1.99 (m, IH), 1.83 (m, 2H), 1.77-1.44 (6H), 1.41 (s, 9H).
13C ΝMR (CDCI3): δ = 175.0, 172.3, 156.8, 145.0, 133.5, 128.5, 79.8, 62.9, 53.0, 50.3, 40.8, 32.1, 32.0, 30.6, 29.9, 29.0, 25.1, 23.1, 22.2.
Mass Spectroscopy: FAB m e 498 (M+H).
Example 4
Synthesis of N-(Toluene-4-sulfonyl)-L-prolyl-
L-glutamic Acid y-tert-Butyl Ester
N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to γ -tert-butyl L- glutamic acid methyl ester hydrochloride using the procedure described in Method 3. The title compound was prepared, via hydrolysis of the methyl ester using LiOH in THF/water, as a solid, mp = 164-166°C. ΝMR data was as follows: Η NMR (CDCI3): δ = 7.76 (d, 2H, / = 8.3 Hz), 7.71 (d, IH, J = 7.4 Hz), 7.36 (d, 2H, J = 8.3 Hz), 4.56 (dd, IH, J = 1.8, 7.0 Hz), 4.12 (dd, IH, / = 3.2, 8.5 Hz), 3.59 (m, IH), 3.23 (m, IH), 2.45 (s, 3H), 2.43 (m, 2H), 2.25-2.07 (3H), 1.79 (m, IH), 1.68 (m, 2H), 1.46 (s, 9H). 13C NMR (CDC13): δ = 174.6, 173.1, 172.8, 145.0, 133.4, 130.6,
128.5, 81.7, 62.8, 52.7, 50.4, 32.1, 30.8, 28.6, 27.6, 25.1, 22.2. Mass Spectroscopy: FAB m/e 455 (M+H).
Example 5 Synthesis of
N-(Toluene-4-sulfonyl)-L-proIyl-L-glutamine
N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to L-glutamine tert-butyl ester hydrochloride using the procedure described in Method 3. The title compound, prepared via cleavage of the tert-butyl ester using trifluoroacetic acid in CH2C12, was recovered as a solid, mp = 45-55°C.
ΝMR data was as follows:
Η ΝMR (DMSO-c ): δ = 8.22 (d, IH, J = 7.7 Hz), 7.75 (d, 2H, J =
8.3 Hz), 7.44 (d, 2H, J = 8.0 Hz), 7.27 (bs, IH), 6.81 (bs, IH), 4.15 (m, 2H), 3.38 (m, IH), 3.12 (m, IH), 2.41 (s, 3H), 2.15 (m, 2H), 1.96 (m,
IH), 1.78 (m, IH), 1.64 (m, 4H), 1.47 (m, IH).
13C ΝMR (CD3OD): δ = 178, 3, 175,3, 174, 9, 146.3, 135.7, 131.6,
129.5, 63.7, 53.8, 51.2, 33.1, 32.5, 29.0, 26.2, 22.1.
Mass Spectroscopy: FAB m/e 398 (M+H).
Example 6
Synthesis of N-(Toluene-4-sulfonyl)-L-prolyI-Ne-(carbobenzyloxy)-L-lysine
N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to Ne-Cbz-L- lysine methyl ester hydrochloride using the procedure described in Method 3. The title compound was prepared via hydrolysis of the methyl ester using LiOH in THF/water.
NMR data was as follows:
Η NMR (CDC13): δ = 7.75 (d, 2H, J = 8.2 Hz), 7.60 (m ,1H), 7.32 (7H), 5.14 (m, IH), 5.07 (s, 2H), 4.57 (m, IH), 4.13 (m, IH), 3.55 (m,
IH), 3.18 (m, 3H), 2.43 (s, 3H), 2.14 (m, IH), 1.96 (m, IH), 1.84 (m, IH), 1.79 (m, IH), 1.57 (m, 4H), 1.41 (m, 2H).
13C NMR (CDC13): δ = 175.0, 172.4, 157.3, 145.0, 137.2, 133.4, 130.6, 129.0, 128.6, 128.5, 128.4, 67.2, 62.8, 53.0, 50.4, 41.3, 32.0, 30.6, 29.7, 25.1, 23.0, 22.2.
Mass Spectroscopy: FAB m/e 532 (M+H).
Example 7
Synthesis of N-(Toluene-4-sulf onyl)-L-prolyl-0-benzyI-L-serine
N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to (9-benzylserine methyl ester hydrochloride using the procedure described in Method 3. The title compound was prepared via hydrolysis of the methyl ester using LiOH in THF/water.
ΝMR data was as follows:
'H ΝMR (CDCI3): δ = 7.75 (m, 3H), 7.32 (6H), 4.73 (m, IH), 4.60 (d, IH, J = 12.3 Hz), 4.51 (d, IH, J = 12.3 Hz), 4.19 (dd, IH, / = 3.0, 8.5 Hz), 3.95 (dd, IH, J = 3.7, 9.6 Hz), 3.78 (m, IH), 3.50 (m, IH), 3.20 (m, IH), 2.43 (s, 3H), 2.11 (m, IH), 1.64 (3H).
13C ΝMR (CDCI3): δ = 173.0, 171.8, 144.4, 137.3, 132.9, 130.0, 128.5, 128.4, 127.9, 127.7, 73.2, 69.0, 62.1, 52.8, 49.7, 30.0, 24.4, 21.5.
Mass Spectroscopy: FAB m/e 447 (M+H). Example 8
Synthesis of
N-(Toluene-4-sulfonyl)-L- prolyl-β-cyclohexyl-L-alanine
N-(Toluene-4-sulfonyl)-L-proline hydrate was coupled to β- cyclohexylalanine methyl ester hydrochloride using the procedure described in Method 3. The title compound was prepared via hydrolysis of the methyl ester using LiOH in THF/water. ΝMR data was as follows:
Η ΝMR (CDC13): δ = 7.76 (d, 2H, J = 8.2 Hz), 7.36 (d, 2H, J = 8.0
Hz), 6.95 (bs, IH), 4.60 (m, IH), 4.17 (dd, IH, J = 2.5, 8.7 Hz), 3.77 (m,
IH), 3.54 (m, IH), 3.21 (m, IH), 2.45 (s, 3H), 2.21 (m, IH), 1.89-0.90
(15H). 13C ΝMR (CDCI3): δ = 175.8, 171.5, 144.4, 132.8, 130.0, 127.8,
62.2, 50.6, 49.7, 39.1, 34.3, 33.4, 32.3, 29.6, 26.3, 26.1, 26.0, 24.4, 21.6. Mass Spectroscopy: FAB m e 423 (M+H).
Preparative Example A Synthesis of
N-(Toluene-4-sulfonyl)-L-prolyl- D-glutamic acid -tert-Butyl Ester
N-Benzyloxycarbonyl-D-glutamic acid 5-tert-butyl ester was converted to the methyl ester using the procedure described in Method 2. γ-tert-Butyl-
D-glutamic methyl ester was prepared from the product of the previous step utilizing the procedure described in Method 4. N-(Toluene-4-sulfonyl)-L- proline hydrate was coupled to the resulting γ-tert-butyl-D-glutamic methyl ester utilizing the procedure described in Method 3. The title compound was prepared via hydrolysis of the methyl ester using the procedure described in Method 6. The product was isolated as a white solid, mp = 50 °C. ΝMR data was as follows: Η NMR (CDCI3, 300 MHz): δ = 7.73 (d, 2H, J = 10.1 Hz); 7.58 (d, IH, / = 8.3 Hz); 7.35 (d, 2H, J = 8.2 Hz); 6.05 (bs, IH); 4.63 (m, IH); 4.10 (m, IH); 3.62 (m, IH); 2.44 (m, 5H), 2.30 (m, IH); 2.05 (m, 2H); 1.80 (m, 1 H); 1.61 (m, 2H); 1.45 (s, 9H). 13C NMR (CDCI3, 75 MHz): δ = 175.1, 173.1, 172.8, 145.1, 133.1,
130.6, 128.5, 81.7, 62.9, 52.3, 50.6, 31.9, 31.2, 28.6, 27.6, 24.8, 22.2. Mass Spectroscopy: (PI-FAB) 455, (M+H)+.
Preparative Example B Synthesis of
N-(Toluene-4-sulfonyl)-L-prolyl- D-asparatic Acid β- rt-Butyl Ester
N-Benzyloxycarbonyl-D-aspartic acid 4-tert-butyl ester was converted to the methyl ester using the procedure described in Method 2. β-tert-Butyl-D- aspartic methyl ester was prepared from the product of the previous step utilizing the procedure described in Method 4. N-(Toluene-4-sulfonyl)-L- proline hydrate was coupled to the resulting β-tert-Butyl-D-aspartic methyl ester utilizing the procedure described in Method 3. The title compound was prepared via hydrolysis of the methyl ester using the procedure described in Method 6. The product was isolated as a white solid, mp = 55 °C. ΝMR data was as follows:
Η ΝMR(CDC13, 300 MHz): δ = 7.82 (d, IH, J = 9.1 Hz); 7.72 (d, 2H, J = 8.2 Hz); 7.35 (d, 2H. , J = 7.0 Hz); 4.90 (m, IH); 4.15 (m, IH); 3.61 (m, IH); 3.15 (m, IH); 2.75 (m, IH); 2.44 (s. 3H); 2.15 (m, 1 H);
1.80 (m, IH); 1.65 (m, 2H); 1.48 (s, 9H).
13C NMR(CDC13, 75 MHz): δ = 144.9, 13175.3, 172.4, 170.4, 0.6, 128.5, 83.14, 63.0, 50.5, 48.9, 37.8, 31.2, 28.6, 24.8, 22.2. Mass Spectroscopy: (PI-FAB) 441, (M+H)+. Preparative Example C
Synthesis of
N-(Toluene-4-suIfonyl)sarcosyl- β-(N-benzylpiperidin-4-yl)-D,L-aIanine
N-(Toluene-4-sulfonyl)sarcosyl-β-(pyrid-4-yl)-D,L-alanine methyl ester was employed in this reaction and was prepared as follows. Sodium metal (2 eq.) was dissolved in EtOH containing diethyl acetamidomalonate (1 eq.) and
4-picolylchloride hydrochloride (1 eq.). The mixmre was heated to reflux for 6 hr, and then cooled and filtered to remove ΝaCl (washed with EtOH).
The solvent was removed in vacuo and the mixmre was taken up into samrated aq ΝaHCO3 and extracted with EtOAc. The solvent was removed and the residue purified by silica gel flash chromatography (95:5 CH2Cl2/MeOH) to give diethyl 2-(4-pyridylmethyl)-2-acetamidomalonate.
Diethyl 2-(4-pyridylmethyl)-2-acetamidomalonate was dissolved in 6N HCl and heated to reflux for about 19 hr whereupon it was cooled to room temperamre and the HCl solution was removed by evaporation in vacuo. The intermediate amino acid dihydrochloride salt was taken up into MeOH samrated with HCl gas and stirred for 3.5 hr. The MeOH/HCl was removed by evaporation in vacuo to give β-(3-pyridyl)alanine methyl ester dihydrochloride (2.235 g, 100%).
N-(Toluene-4-sulfonyl)sarcosine was coupled to 3-(4-pyridyl)alanine methyl ester dihydrochloride using the procedure described in Method 3 to give N-(toluene-4-sulfonyl)sarcosyl-β-(4-pyridyl)alanine.
N-(Toluene-4-sulfonyl)sarcosyl-D,L-β-(4-pyridyl)alanine methyl ester (266 mg, 0.656 mmol) was dissolved in methanol (6 mL) and 12 Ν HCl (273 μL) and PtO2 (25 mg) were added. The mixmre was hydrogenated at 40 psi
H2 for 4 hr. The mixmre was filtered and the solvent was removed in vacuo to give N-(toluene-4-sulfonyl)sarcosyl-D,L-β-(4-piperidinyl)alanine methyl ester hydrochloride (260 mg, 88%).
N-(Toluene-4-sulfonyl)sarcosyl-β-(piperidin-4-yl)-D,L-alanine methyl ester hydrochloride (180 mg, 0.402 mmol) was dissolved in MeOH (3 mL).
Triethylamine (56 μL), benzaldehyde (53 mg, 0.502 mmol) and 1.0 M ΝaBH3CΝ in THF (400 μL) were added and the mixmre was stirred for 5 hr. IN HCl (3 mL) was added and the mixmre was stirred for 5 minutes before diluting with samrated aqueous NaHCO3 (30 mL). The mixmre was extracted with EtOAc (3 x 25 mL) and the combined extracts were dried
(Na2SO4), filtered and evaporated in vacuo to give a residue which was purified by silica gel flash chromatography (95:5:0.5 CH2Cl2/MeOH/NH4OH) to give N-(toluene-4-sulfonyl)sarcosyl-β-(N- benzylpiperidin-4-yl)-D,L-alanine methyl ester (105 mg, 52%). The title compound was prepared via hydrolysis of the methyl ester using 0.5 Ν aqueous ΝaOH in THF/water as a very hygroscopic solid. ΝMR data was as follows:
Η ΝMR (CD3OD): δ = 7.73 (d, 2H, J = 8.2 Hz), 7.43 (d, 2H, J = 8.2 Hz), 7.33 (m, 5H), 4.34 (m, IH), 3.74 (d, IH, J = 16.5 Hz), 3.62 (s, 2H), 3.58 (d, IH, J = 16.5 Hz), 2.94 (m, 2H), 2.79 (s, 3H), 2.44 (s, 3H),
2.17 (m, IH), 1.90-1.26 (8H).
13C ΝMR (CD3OD): δ = 179.6, 170.0, 146.1, 137.6, 135.7, 131.8, 131.6, 130.0, 129.4, 64.4, 55.0, 54.6, 41.3, 37.8, 34.0, 33.5, 32.4, 22.1. Mass Spectroscopy: FAB m/e 488 (M+H). Example 9
Synthesis of
N-(Toluene-4-sulfonyl)sarcosyI- β-(N-tert-butoxycarbonylpiperidin-4-yI)-D,L-alanine
N-(Toluene-4-sulfonyl)sarcosyl-β-(4-piperidinyl)-D,L-alanine methyl ester hydrochloride (see Preparative Example C (109) above) (0.257 mmol) was dissolved in CHC13 (3 mL). Triethylamine (43 μL) and di-tert-butyl dicarbonate (67 mg, 0.309 mmol) were added and the mixmre was stirred for 1 hr. The mixmre was diluted with samrated aqueous ΝaHCOj (20 mL) and extracted with CHC13 (2 x 20 mL). The extracts were dried (Νa^ J, filtered and evaporated in vacuo to give a residue which was purified by silica gel flash chromatography (95:5 CH2Cl2/MeOH) to yield N-(toluene-4- sulfonyl)sarcosyl-β-(N-tert-butoxycarbonylpiperidin-4-yl)-D,L-alanine methyl ester (121 mg, 92%). The title compound was prepared via hydrolysis of the methyl ester using LiOH in THF/water (70 mg, 99%).
ΝMR data was as follows:
Η ΝMR (CDC13): δ = 7.69 (d, 2H, / = 8.2 Hz), 7.37 (d, 2H, J = 8.0
Hz), 7.14 (d, IH, J = 8.7 Hz), 6.60 (bs, IH), 4.69 (m, IH), 4.09 (m, 2H), 3.91 (d, IH, J = 16.7 Hz), 3.42 (d, IH, J = 16.5 Hz), 2.81 (s, 3H), 2.68
(m, 2H), 2.45 (s, 3H), 1.89-1.08 (7H), 1.45 (s, 9H).
13C ΝMR (CDC13): δ = 175.1, 168.3, 155.0, 144.5, 132.7, 130.0,
127.6, 79.7, 77.2, 54.0, 49.6, 38.5, 37.0, 32.5, 32.1, 31.1, 28.4, 21.6.
Mass Spectroscopy: FAB m/e 504 (M+Li).
Example 10
Synthesis of
N-(Toluene-4-sulfonyl)sarcosyl- β-(N-benzoylpiperidin-4-yl)-D,L-alanine
N-(Toluene-4-sulfonyl)sarcosyl-β-(piperidin-4-yl)-D,L-alanine methyl ester hydrochloride (see Preparative Example C (109)) (65 mg, 0.15 mmol) was dissolved in CHC13 (3 mL) and cooled in an ice bath. Triethylamine (61 μL) and benzoyl chloride (21 mg, 0.15 mmol) were added and the mixmre was stirred for 1 hr. The mixmre was diluted with IN HCl (20 mL) and extracted with EtOAc (2 x 25 mL). The extracts were dried (N%SO4), filtered and evaporated in vacuo to give a residue which was purified by silica gel flash chromatography (95:5 CH2Cl2/MeOH) to yield N-(toluene-4- sulfonyl)sarcosyl-β-(N-benzoylpiperidin-4-yl)-D,L-alanine methyl ester (67 mg, 89%). The title compound was prepared via hydrolysis of the methyl ester using LiOH in THF/water (71 mg, 100%).
ΝMR data was as follows: Η ΝMR (CDC13): δ = 7.68 (d, 2H, J = 8.3 Hz), 7.39 (m, 7H), 7.17
(d, IH, J = 8.3 Hz), 6.55 (bs, IH), 4.68 (m, 2H), 3.92 (d, IH, J = 16.5 Hz), 3.72 (m, IH), 3.37 (d, IH, J = 16.7 Hz), 3.00 (m, IH), 2.78 (m, IH), 2.80 (s, 3H), 2.45 (s, 3H), 2.90-1.60 (5H), 1.20 (m, 2H).
13C ΝMR (CDC13): δ = 174.4, 170.7, 168.2, 144.5, 135.6, 132.7, 130.0, 129.7, 128.4, 127.6, 126.8, 77.3, 77.2, 54.0, 49.6, 42.5, 37.0,
32.5, 21.6,
Mass Spectroscopy: FAB m/e 502 (M+H).
Example 11 Synthesis of
N-(Toluene-4-sulfonyl)sarcosyl- Ne-tert-butoxycarbonyl-L-lysine
N-(Toluene-4-sulfonyl)sarcosine was coupled to Nε-Boc-L-lysine methyl ester hydrochloride using the procedure described in Method 3 to give N-
(toluene-4-sulfonyl)sarcosyl-Ne-Boc-L-lysine methyl ester. The title compound was prepared via hydrolysis of the methyl ester using LiOH in THF/water.
ΝMR data was as follows: Η ΝMR (DMSO-cL): δ = 8.21 (d, IH, J = 7.7 Hz), 7.67 (d, 2H, J =
7.7 Hz), 7.43 (d, 2H, J = 8.2 Hz), 6.76 (m, IH), 4.13 (m, IH), 3.69 (s, 2H), 3.34 (bs, IH), 2.88 (m, 2H), 2.69 (s, 3H), 2.41 (s, 3H), 1.68 (m, IH), 1.58 (m, IH), 1.37 (s, 9H), 1.27 (m, 2H).
13C NMR (DMSO-cL): δ = 173.7, 167.4, 155.9, 143.7, 134.4, 130.1, 127.7, 77.7, 52.3, 52.2, 39.8, 36.1, 31.0, 29.4, 28.6, 23.1, 21.4. Mass Spectroscopy: FAB m/e 478 (M+Li).
Example 12
Synthesis of N-(Toluene-4-sulfonyl)-L-prolyl- Ne-t e/t-butoxycarbonyl-D-lysine
A CH2C12 solution of N -Cbz-Ne-Boc-D-lysine was chilled to -15 °C (dry ice/CH3CΝ bath) to which was added diethylisopropylamine (1.5 eq.), methanol (3.0 eq.) and BOP (1.1 eq) to form the methyl ester. The reaction was allowed to warm temperamre and stirred overnight. The reaction mixmre was then poured into 0.1 M HCl and the organic phase washed with H2O, saturated NaHCO3, and brine, and then dried over MgSO4, filtered and concentrated. The crude methyl ester was purified by column chromatography. Deprotection with 10% Pd(C) in MeOH at 40 psi H2 gave the free amine which was coupled to Tos-Pro-OH using the procedure described in Method 3. The ester was hydrolyzed using the procedure described in Method 6. The product was isolated as a white solid. NMR data was as follows:
Η NMR(CDC13, 300 MHz): δ = 7.74 (d, 2H, J = 8.0 Hz); 7.40 - 7.34 (m, 3H); 4.91 (bs, IH); 4.60 (m, IH); 4.06 (m, IH); 3.63 (m, 1 H);
3.15 (m, 3H), 2.44 (s, 3H); 2.22-1.90 (m, 2H); 1.80 (m, 2H); 1.70 - 1.30 (bm, 15 H).
13C NMR(CDC13, 75 MHz): δ = 175.3, 172.3, 156.9, 145.1, 133.1, 130.6, 128.5, 79.7, 63.1, 52.6, 50.6, 40.7, 32.1, 31.2, 29.7, 28.9, 24.8, 22.9, 22.2.
Mass Spectroscopy: (PI-FAB) 498, (M+H)+ . - Il l -
Example 13
Synthesis of N-(Toluene-4-sulfonyl)-L-prolyl-(2,3-dehydro)phenylaIanine
N-(Toluene-4-sulfonyl)-L-prolyl-β-hydroxy-D,L-phenylalanine methyl ester (501 mg, 1.12 mmol) was dissolved in CH2C12 (10 mL) and cooled in an ice bath. Triethylamine (195 μL) was added, followed by methanesulfonyl chloride (135 mg, 1.13 mmol). The mixmre was stirred was stirred for 45 minutes before additional triethylamine (313 μL) was added. The mixmre was warmed to room temperamre and stirred for 3 hr.
The mixture was diluted with CH2C12 and washed with samrated aqueous
ΝaHCO3 (2 X 30 mL), dried (NaSO4), filtered and evaporated in vacuo to give a residue which was purified by silica gel flash chromatography (95:5 CH2Cl2/MeOH) to give the dehydro ester (453 mg, 94%). The title compound was prepared via hydrolysis of the methyl ester using NaOH in methanol and purified by silica gel flash chromatography (9/1 CH2C12/
MeOH) to give the compound as a white solid (120 mg, 62%).
NMR data was as follows: Η NMR (CD3OD): δ = 7.92-7.68 (m, 4H), 7.52-7.27 (m, 6H), 4.28
(m, IH), 3.68 (m, IH), 3.31 (m, 3H), 2.44 (s, 3H), 2.09-1.46 (4H).
13C NMR (CD3OD): δ = 174.6, 146.4, 135.6, 135.3, 132.0, 131.7, 131.1, 130.3, 130.0, 129.9, 129.6, 64.4, 51.5, 32.4, 26.1, 22.2.
Mass Spectroscopy: FAB m/e 439 (M+Li).
Example 14
Synthesis of
N-(Toluene-4-sulfonyl)-L-(5,5-dimethyl)thiaprolyl-
Ne-(tørf-butoxycarbonyl)-L-lysine Methyl Ester
The title compound was prepared using the procedure described in Method 13 employing suitable starting materials to provide for a solid, mp = 51-53°C. NMR data was as follows:
Η NMR (CDCI3, 300 MHz): δ = 1.14 (s, 3H), 1.36 (s, 3H), 1.42 (s, 9H), 1.43 (m, 4H), 1.80 (m, 2H), 2.45 (s, 3H), 3.08 (m, 2H), 3.78 (s, 3H), 3.87 (s, IH), 4.42 (d, IH, J= 9.7 Hz), 4.57 (m, IH), 4.65 (d, IH, J = 9.7 Hz), 7.09 (d, IH, J = 7.7 Hz), 7.35 (d, 2H, 8.1 Hz), 7.77 (d, 2H, J = 8.2
Hz).
13C NMR (CDC13, 75 MHz): δ = 22.2, 23.0, 24.9, 29.0, 30.0, 32.5, 40.8, 51.7, 52.8, 53.1, 55.2, 74.1, 128.7, 130.6, 133.3, 145.4, 156.5, 169.1, 172.5. Mass Spectroscopy: (FAB+) 558 (M+H).
Example 15
Synthesis of N- (Toluene-4-sulf ony 1)-L- (5 , 5-dimethyl)thiaprolyl- Ne-( /f-butoxycarbonyl)-L-lysine
The title compound was prepared from the product of Example 14 (348) using the procedure described in Method 7 as a solid, mp = > 150°C (dec).
NMR data was as follows: Η NMR (CDCI3, 300 MHz): 6 = 1.15 (s, 3H), 1.37 (s, 3H), 1.42 (s,
9H), 1.49 (m, 4H), 2.05 (m, 2H), 2.45 (s, 3H), 3.10 (br s, 2H), 3.92 (s, IH), 4.47-4.73 (m, 3H), 7.37 (d, 2H, J = 8.2 Hz), 7.80 (d, 2H, J = 8.2 Hz).
13C NMR (CDCI3, 75 MHz): δ = 22.3, 25.1, 28.9, 29.5, 30.0, 30.9, 40.9, 51.1, 54.6, 54.7, 55.3, 74.2, 79.2, 128.5, 128.6, 130.6, 133.3,
145.4, 156.77, 156.81.
Mass Spectroscopy: (FAB+) 544 (M+H). Example 16
Synthesis of
N-(Toluene-4-sulfonyI)-L-(5,5-dimethyl)- thiaprolyl-L-asparagine
The product was prepared from suitable starting materials via Method 3 and Method 11 and was isolated as a solid.
NMR data was as follows:
Η NMR (DMSO-cL,, 300 MHz): δ = 8.39 (d, IH, J = 7.6 Hz); 7.73 (d, 2H, J = 8.2 Hz); 7.42 (d, 2H, J = 8.0 Hz); 6.96 (br s, IH); 4.60 - 4.51
(br m, IH); 4.6 (m, IH); 4.13 (s, IH); 2.56 (m, IH); 2.43 (m, lh); 2.40 (s,
3H); 1.28 (s, 3H); 1.18 (s, 3H).
13C NMR (DMSO-cL, 75 MHz): δ = 172.8, 171.6, 167.8, 144.2,
134.3, 130.2, 127.9, 72.03, 54.9, 50.5, 48.9, 30.1, 24.9, 21.4. Mass Spectroscopy: (PI-FAB) 430, (M+H)+.
Other compounds prepared by the methods described above include those set forth in Table II below:
R3 O
R>-SO2-N(R2)-C-Q-CH-C-R6
H R5
Q=-C(O)NR7-
σs
CO c
DO CO
H C H m co x m m H 53 c r- rπ t
CO c
GO CO
C H m o x m m
H c r m-
NJ
CO c
CO CO c
H m co x m m
30 c r- m ro σ>
CO c
DO CO
H
H
C H m
CO
X m m
H c r m* t n
>
CO c
CD O
H
H C H co x m
H c ι- rπ to
O)
X/i rx. m t
3J r ΓΠ- ro
Example 79
In vitro Assay For Determining Binding of Candidate Compounds to VLA-4
An in vitro assay was used to assess binding of candidate compounds to α4β! integrin. Compounds which bind in this assay can be used to assess VCAM-1 levels in biological samples by conventional assays (e.g., competitive assays). This assay is sensitive to I Q values as low as about InM.
The activity of a4p, integrin was measured by the interaction of soluble VCAM-1 with Jurkat cells (e.g. , American Type Culture Collection Nos. TIB 152, TIB 153, and CRL 8163), a human T-cell line which expresses high levels of α4β, integrin. VCAM-1 interacts with the cell surface in an α4βj integrin-dependent fashion (Yednock, et al. J. Biol. Chem., 1995,
270:28740).
Recombinant soluble VCAM-1 was expressed as a chimeric fusion protein containing the seven extracellular domains of VCAM-1 on the N- terminus and the human IgG, heavy chain constant region on the C-terminus. The VCAM-1 fusion protein was made and purified by the manner described by Yednock, supra.
Jurkat cells were grown in RPMI 1640 supplemented with 10% fetal bovine serum, penicillin, streptomycin and glutamine as described by Yednock, supra.
Jurkat cells were incubated with 1.5 mM MnCl2 and 5 μg/mL 15/7 antibody for 30 minutes on ice. Mn+2 activates the receptor to enhance ligand binding, and 15/7 is a monoclonal antibody that recognizes an activated/ligand occupied conformation of α4β[ integrin and locks the molecule into this conformation thereby stabilizing the VCAM-l/o^ integrin interaction. Yednock, et al. , supra. Antibodies similar to the 15/7 antibody have been prepared by other investigators (Luque, et al, 1996, J. Biol. Chem. 271 : 11067) and may be used in this assay.
Cells were then incubated for 30 minutes at room temperamre with candidate compounds, in various concentrations ranging from 66 μM to 0.01 μM using a standard 5-point serial dilution. 15 μL soluble recombinant VCAM-1 fusion protein was then added to Jurkat cells and incubated for 30 minutes on ice. (Yednock et al., supra.).
Cells were then washed two times and resuspended in PE-conjugated goat F(ab')2 anti-mouse IgG Fc (Immunotech, Westbrook, ME) at 1:200 and incubated on ice, in the dark, for 30 minutes. Cells were washed twice and analyzed with a standard fluorescence activated cell sorter ("FACS") analysis as described in Yednock, et al., supra.
Compounds having an IC50 of less than about 15μM possess binding affinity to α^.
When tested in this assay, each of the compounds in Examples 1-78 has an IC50 of 15 μM or less.
Example 80
In vitro Saturation Assay For Determining Binding of Candidate Compounds to ct. l
The following describes an in vitro assay to determine the plasma levels needed for a compound to be active in the Experimental Autoimmune Encephalomyelitis ("EAE") model, described in the next example, or in other in vivo models.
Log-growth Jurkat cells are washed and resuspended in normal animal plasma containing 20 μg/ml of the 15/7 antibody (described in the above example).
The Jurkat cells are diluted two-fold into either normal plasma samples containing known candidate compound amounts in various concentrations ranging from 66 μM to 0.01 μM, using a standard 12 point serial dilution for a standard curve, or into plasma samples obtained from the peripheral blood of candidate compound-treated animals.
Cells are then incubated for 30 minutes at room temperamre, washed twice with phosphate-buffered saline ("PBS") containing 2% fetal bovine serum and ImM each of calcium chloride and magnesium chloride (assay medium) to remove unbound 15/7 antibody.
The cells are then exposed to phycoerythrin-conjugated goat F(ab' 2 anti- mouse IgG Fc (Immunotech, Westbrook, ME), which has been adsorbed for any non-specific cross-reactivity by co-incubation with 5 % serum from the animal species being studied, at 1:200 and incubated in the dark at 4°C for 30 minutes.
Cells are washed twice with assay medium and resuspended in the same.
They are then analyzed with a standard fluorescence activated cell sorter ("FACS") analysis as described in Yednock et al. J. Biol. Chem., 1995, 270:28740. The data is then graphed as fluorescence versus dose, e.g. , in a normal dose-response fashion. The dose levels that result in the upper plateau of the curve represent the levels needed to obtain efficacy in an in vivo model.
This assay may also be used to determine the plasma levels needed to saturate the binding sites of other integrins, such as the gβ, integrin, which is the integrin most closely related 4β; (Palmer et al, 1993, J. Cell Bio., 123: 1289). Such binding is predictive of in vivo utility for inflammatory conditions mediated by α9β]. integrin, including by way of example, airway hyper-responsiveness and occlusion that occurs with chronic asthma, smooth muscle cell proliferation in atherosclerosis, vascular occlusion following angioplasty, fibrosis and glomerular scarring as a result of renal disease, aortic stenosis, hypertrophy of synovial membranes in rheumatoid arthritis, and inflammation and scarring that occur with the progression of ulcerative colitis and Crohn' s disease.
Accordingly, the above-described assay may be performed with a human colon carcinoma cell line, SW 480 (ATTC #CCL228) transfected with cDNA encoding 9 integrin (Yokosaki et al., 1994, J. Biol. Chem., 269:26691), in place of the Jurkat cells, to measure the binding of the c l integrin. As a control, SW 480 cells which express other α and p subunits may be used.
Accordingly, another aspect of this invention is directed to a method for treating a disease in a mammalian patient, which disease is mediated by c , , and which method comprises administering to said patient a therapeutically effective amount of a compound of this invention. Such compounds are preferably administered in a pharmaceutical composition described herein above. Effective daily dosing will depend upon the age, weight, condition of the patient which factors can be readily ascertained by the attending clinician. However, in a preferred embodiment, the compounds are administered from about 20 to 500 μg/kg per day.
Example 81 In vivo Evaluation
The standard multiple sclerosis model, Experimental Autoimmune (or Allergic) Encephalomyelitis ("EAE"), is used to determine the effect of candidate compounds to reduce motor impairment in rats or guinea pigs. Reduction in motor impairment is based on blocking adhesion between leukocytes and the endothelium and correlates with, anti-inflammatory activity in the candidate compound. This model has been previously described by Keszthelyi et al., Neurology, 1996, 47: 1053-1059, and measures the delay of onset of disease.
Brains and spinal cords of adult Hartley guinea pigs are homogenized in an equal volume of phosphate-buffered saline. An equal volume of Freund's complete adjuvant (100 mg mycobacterium tuberculosis plus 10 ml Freund's incomplete adjuvant) is added to the homogenate. The mixmre is emulsified by circulating it repeatedly through a 20 ml syringe with a peristaltic pump for about 20 minutes.
Female Lewis rats (2-3 months old, 170-220 g) or Hartley guinea pigs (20 day old, 180-200 g) are anesthetized with isoflurane and three injections of the emulsion, 0.1 ml each, are made in each flank. Motor impairment onset is seen in approximately 9 days.
Candidate compound treatment begins on Day 8, just before onset of symptoms. Compounds are administered subcutaneously ("SC"), orally ("PO") or intraperitoneally ("IP"). Doses are given in a range of lOmg/kg to 200 mg/kg, bid, for five days, with typical dosing of 10 to 100 mg/kg SC, 10 to 50 mg/kg PO, and 10 to 100 mg/kg IP.
Antibody GG5/3 against α4βj integrin (Keszthelyi et al. , Neurology, 1996, 47: 1053-1059), which delays the onset of symptoms, is used as a positive control and is injected subcutaneously at 3 mg/kg on Day 8 and 11.
Body weight and motor impairment are measured daily. Motor impairment is rated with the following clinical score:
0 no change
1 tail weakness or paralysis
2 hindlimb weakness
3 hindlimb paralysis
4 moribund or dead
A candidate compound is considered active if it delays the onset of symptoms, e.g. , produces clinical scores no greater than 2 or slows body weight loss as compared to the control.
Example 82 Asthma Model
Inflammatory conditions mediated by α4β, integrin include, for example, airway hyper-responsiveness and occlusion that occurs with chronic asthma. The following describes an asthma model which can be used to s dy the in vivo effects of the compounds of this invention for use in treating asthma.
Following the procedures described by Abraham et al, J. Clin. Invest, 93:776-787 (1994) and Abraham et al, Am J. Respir Crit Care Med, 156:696-703 (1997), both of which are incorporated by reference in their entirety, compounds of this invention are formulated into an aerosol and administered to sheep which are hypersensitive to Ascaris suum antigen. Compounds which decrease the early antigen-induced bronchial response and/or block the late -phase airway response, e.g., have a protective effect against antigen-induced late responses and airway hyper-responsiveness ("AHR"), are considered to be active in this model.
Allergic sheep which are shown to develop both early and late bronchial responses to inhaled Ascaris suum antigen are used to smdy the airway effects of the candidate compounds. Following topical anesthesia of the nasal passages with 2% lidocaine, a balloon catheter is advanced through one nostril into the lower esophagus. The animals are then intubated with a cuffed endotracheal tube through the other nostril with a flexible fiberoptic bronchoscope as a guide.
Pleural pressure is estimated according to Abraham (1994). Aerosols (see formulation below) are generated using a disposable medical nebulizer that provides an aerosol with a mass median aerodynamic diameter of 3.2 μm as determined with an Andersen cascade impactor. The nebulizer is connected to a dosimeter system consisting of a solenoid valve and a source of compressed air (20 psi). The output of the nebulizer is directed into a plastic T-piece, one end of which is connected to the inspiratory port of a piston respirator. The solenoid valve is activated for 1 second at the beginning of the inspiratory cycle of the respirator. Aerosols are delivered at Vτ of 500 ml and a rate of 20 breaths/minute. A 0.5% sodium bicarbonate solution only is used as a control.
To assess bronchial responsiveness, cumulative concentration-response curves to carbachol can be generated according to Abraham (1994). Bronchial biopsies can be taken prior to and following the initiation of treatment and 24 hours after antigen challenge. Bronchial biopsies can be preformed according to Abraham (1994). An in vitro adhesion smdy of alveolar macrophages can be performed according to Abraham (1994), and a percentage of adherent cells is calculated.
Aerosol Formulation
A solution of the candidate compound in 0.5% sodium bicarbonate/saline (w/v) at a concentration of 30.0 mg/mL is prepared using the following procedure:
A. Preparation of 0.5 % Sodium Bicarbonate/Saline Stock Solution: 100.0 mL
Procedure:
1. Add 0.5g sodium bicarbonate into a 100 mL volumetric flask.
2. Add approximately 90.0 mL saline and sonicate until dissolved.
3. Q.S. to 100.0 mL with saline and mix thoroughly.
B. Preparation of 30.0 mg/mL Candidate Compound: 10.0 mL
Procedure:
1. Add 0.300 g of the candidate compound into a 10.0 mL volumetric flask. 2. Add approximately 9.7 mL of 0.5% sodium bicarbonate / saline stock solution.
3. Sonicate until the candidate compound is completely dissolved.
4. Q.S. to 10.0 mL with 0.5% sodium bicarbonate / saline stock solution and mix thoroughly.
Using a conventional oral formulation, compounds of this invention would be active in this model.

Claims

WHAT IS CLAIMED IS:
1. A compound of formula I:
R3 O
I II
R1-SO2-N(R2)-C-Q-CH-C-OH I
H R5
where
R1 is selected from the group consisting of alkyl, substimted alkyl, aryl, substimted aryl, cycloalkyl, substimted cycloalkyl, heterocyclic, substimted heterocylic, heteroaryl and substituted heteroaryl;
R2 is selected from the group consisting of hydrogen, alkyl, substimted alkyl, cycloalkyl, substimted cycloalkyl, cycloalkenyl, substimted cycloalkenyl, heterocyclic, substimted heterocyclic, aryl, substimted aryl, heteroaryl, substimted heteroaryl, and R1 and R2 together with the nitrogen atom bound to R2 and the SO2 group bound to R1 can form a heterocyclic or a substimted heterocyclic group;
R3 is selected from the group consisting of hydrogen, alkyl, substimted alkyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic and, when R2 does not form a heterocyclic group with R1, R2 and R3 together with the nitrogen atom bound to R2 and the carbon atom bound to R3 can form a heterocyclic or a substimted heterocyclic group;
R5 is -ALK-X or =CH-Y where ALK is an alkyl group of from 1 to 10 carbon atoms attached via a methylene group (-CH2-) to the carbon atom to which it is attached; X is selected from the group consisting of substimted alkylcarbonylamino, substimted alkenylcarbonylamino, substimted alkynylcarbonylamino, heterocyclylcarbonylamino, substimted heterocyclylcarbonylamino, acyl, acyloxy, aminocarbonyloxy, acylamino, oxycarbonylamino, alkoxycarbonyl, substimted alkoxycarbonyl, aryloxycarbonyl, substimted aryloxycarbonyl, cycloalkoxycarbonyl, substituted cycloalkoxycarbonyl, heteroaryloxycarbonyl, substimted heteroaryloxycarbonyl, heterocyclyloxycarbonyl, substimted heterocyclyloxycarbonyl, cycloalkyl, substimted cycloalkyl, samrated heterocyclic, substimted samrated heterocyclic, substimted alkoxy, substimted alkenoxy, substimted alkynoxy, heterocyclyloxy, substimted heterocycloxy, substimted thioalkyl, substimted thioalkenyl, substimted thioalkynyl, aminocarbonylamino, aminothiocarbonylamino, guanidino, amidino, alkylamidino, thioamidino, halogen, cyano, nitro, -OS(O)2-alkyl, -OS(O)2-substituted alkyl, -OS(O)2-cycloalkyl, -OS(O)2-substituted cycloalkyl, -OS(O)2-aryl, -OS(O)2-substituted aryl, -OS(O)2-heteroaryl, -OS(O)2-substimted heteroaryl, -OS(O)2-heterocyclic, -OS(O)2-substituted heterocyclic, -OSO2-NRR where R is hydrogen or alkyl, -NRS^-alkyl,
-NRS(O)2-substituted alkyl, -NRS(O)2-cycloalkyl, -NRS(O)2-substituted cycloalkyl, -NRS(O)2-aryl, -NRS(O)2-substituted aryl, -NRS(O)2-heteroaryl, -NRS(O)2-substimted heteroaryl, -NRS(O)2-heterocyclic, -NRS(O)2- substimted heterocyclic, -NRS(O)2-NR-alkyl, -NRS(O)2-NR-substimted alkyl, -NRS(O)2-NR-cycloalkyl, -NRS(O)2-NR-substituted cycloalkyl,
-NRS(O)2-NR-aryl, -NRS(O)2-NR-substituted aryl, -NRS(O)2-NR-heteroaryl, -NRS(O)2-NR-substimted heteroaryl, -NRS(O)2-NR-heterocyclic, -NRS(O)2- NR-substituted heterocyclic where R is hydrogen or alkyl, ^(O^-alkyl, - S(O)2-substimted alkyl, -S(O)2-aryl, -S(O)2-substimted aryl, -S(O)2- substimted heteroaryl, -S(O)2-substimted heteroaryl, -S(O)2-heterocyclic, -
S(O)2-substimted heterocyclic, mono- and di-(substituted alkyl)amino, N,N- (alkyl, substimted alkyl)amino, N,N-(aryl, substimted alkyl)amino, N,N- (substimted aryl, substimted alkyl)amino, N,N-(heteroaryl, substimted alkyl)amino, N,N-(substimted heteroaryl, substituted alkyl)amino, N,N- (heterocyclic, substimted alkyl)amino, N,N-N,N-(substimted heterocyclic, substimted alkyl)amino, mono- and di-(heterocyclic)amino, mono- and di- (substimted heterocyclic)amino, N,N-(alkyl, heterocyclic)amino, N,N-(alkyl, substimted heterocyclic)amino, N,N-(aryl, heterocyclic)amino, N,N- (substimted aryl, heterocyclic)amino, N,N-(aryl, substimted heterocyclic)amino, N,N-(substimted aryl, substimted heterocyclic)amino,
N,N-(heteroaryl, heterocyclic)amino, N,N-(heteroaryl, substimted heterocyclic)amino, N,N-(substituted heteroaryl, heterocyclic)amino, and N,N-(substimted heteroaryl, substimted heterocyclic)amino; and Y is selected from the group consisting of alkyl, substimted alkyl, aryl, substimted aryl, cycloalkyl, substimted cycloalkyl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic;
Q is -C(X)NR7- wherein R7 is selected from the group consisting of hydrogen and alkyl; and X is selected from the group consisting of oxygen and sulfur; and pharmaceutically acceptable salts thereof with the provisos that
A. when R1 is p-methylphenyl, R2 and R3 are joined together with the nitrogen atom bound to R2 and the carbon atom bound to R3 to form a pyrrolidinyl ring and Q is -C(O)NH-, then R5 is not -CH2C(O)-O-t-butyl or - CH2CH2C(O)-O-t-butyl; and
B. when R1 is p-methylphenyl, R2 is methyl, R3 is hydrogen and Q is -C(O)NH-, then R5 is not -CH2(N-benzylpiperin-4-yl).
A compound of formula I A:
R3 O
R1-SO2-N(R2)-C-Q-CH-C-R6 IA
H R5
where R1 is selected from the group consisting of alkyl, substimted alkyl, aryl, substimted aryl, cycloalkyl, substimted cycloalkyl, heterocyclic, substimted heterocylic, heteroaryl and substimted heteroaryl;
R2 is selected from the group consisting of hydrogen, alkyl, substimted alkyl, cycloalkyl, substimted cycloalkyl, cycloalkenyl, substimted cycloalkenyl, heterocyclic, substimted heterocyclic, aryl, substimted aryl, heteroaryl, substimted heteroaryl, and R1 and R2 together with the nitrogen atom bound to R2 and the SO2 group bound to R1 can form a heterocyclic or a substimted heterocyclic group; R3 is selected from the group consisting of hydrogen, alkyl, substimted alkyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic and, when R2 does not form a heterocyclic group with R1, R2 and R3 together with the nitrogen atom bound to R2 and the carbon atom bound to R3 can form a heterocyclic or a substimted heterocyclic group;
R5 is -ALK-X or =CH-Y where ALK is an alkyl group of from 1 to 10 carbon atoms attached via a methylene group (-CH2-) to the carbon atom to which it is attached; X is selected from the group consisting of substimted alkylcarbonylamino, substimted alkenylcarbonylamino, substimted alkynylcarbonylamino, heterocyclylcarbonylamino, substimted heterocyclylcarbonylamino, acyl, acyloxy, aminocarbonyloxy, acylamino, oxycarbonylamino, alkoxycarbonyl, substimted alkoxycarbonyl, aryloxycarbonyl, substimted aryloxycarbonyl, cycloalkoxycarbonyl, substimted cycloalkoxycarbonyl, heteroaryloxycarbonyl, substimted heteroaryloxycarbonyl, heterocyclyloxycarbonyl, substimted heterocyclyloxycarbonyl, cycloalkyl, substimted cycloalkyl, samrated heterocyclic, substimted samrated heterocyclic, substimted alkoxy, substimted alkenoxy, substimted alkynoxy, heterocyclyloxy, substimted heterocycloxy, substimted thioalkyl, substimted fhioalkenyl, substimted thioalkynyl, aminocarbonylamino, aminothiocarbonylamino, guanidino, amidino, alkylamidino, thioamidino, halogen, cyano, nitro, -OS(O)2-alkyl, -OS(O)2-substimted alkyl, -OS(O)2-cycloalkyl, -OS(O)2-substituted cycloalkyl, -OS(O)2-aryl, -OS(O)2-substimted aryl, -OS(O)2-heteroaryl, -OS(O)2-substimted heteroaryl, -OS(O)2-heterocyclic, -OS(O)2-substituted heterocyclic, -OSO2-NRR where R is hydrogen or alkyl, -NRS^ al yl, -NRS(O)2-substituted alkyl, -NRS(O)2-cycloalkyl, -NRS(O)2-substimted cycloalkyl, -NRS(O)2-aryl, -NRS(O)2-substimted aryl, -NRS(O)2-heteroaryl, -NRS(O)2-substimted heteroaryl, -NRS(O)2-heterocyclic, -NRS(O)2- substimted heterocyclic, -NRS(O)2-NR-alkyl, -NRS(O)2-NR-substimted alkyl, -NRS(O)2-NR-cycloalkyl, -NRS(O)2-NR-substituted cycloalkyl, -NRS(O)2-NR-aryl, -NRS(O)2-NR-substimted aryl, -NRS(O)2-NR-heteroaryl, -NRS(O)2-NR-substimted heteroaryl, -NRS(O)2-NR-heterocyclic, -NRS(O)2- NR-substituted heterocyclic where R is hydrogen or alkyl, -S(O)2-alkyl, - S(O)2-substituted alkyl, -S(O)2-aryl, -S(O)2-substimted aryl, -S(O)2- substimted heteroaryl, -S(O)2-substimted heteroaryl, -S(O)2-heterocyclic, - S(O)2-substimted heterocyclic, mono- and di-(substituted alkyl)amino, N,N- (alkyl, substimted alkyl)amino, N,N-(aryl, substimted alkyl)amino, N,N- (substimted aryl, substimted alkyl)amino, N,N-(heteroaryl, substimted alkyl)amino, N,N-(substituted heteroaryl, substimted alkyl)amino, N,N-
(heterocyclic, substimted alkyl)amino, N,N-N,N-(substimted heterocyclic, substimted alkyl)amino, mono- and di-(heterocyclic)amino, mono- and di- (substimted heterocyclic)amino, N,N-(alkyl, heterocyclic)amino, N,N-(alkyl, substimted heterocyclic)amino, N,N-(aryl, heterocyclic)amino, N,N- (substimted aryl, heterocyclic)amino, N,N-(aryl, substimted heterocyclic)amino, N,N-(substituted aryl, substimted heterocyclic)amino, N,N-(heteroaryl, heterocyclic)amino, N,N-(heteroaryl, substituted heterocyclic)amino, N,N-(substimted heteroaryl, heterocyclic)amino, and N,N-(substimted heteroaryl, substimted heterocyclic)amino; and Y is selected from the group consisting of alkyl, substimted alkyl, aryl, substimted aryl, cycloalkyl, substimted cycloalkyl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic;
R6 is selected from the group consisting of 2,4-dioxo-tetrahydrofuran-3- yl (3,4-enol), amino, alkoxy, substimted alkoxy, cycloalkoxy, substimted cycloalkoxy, -O-(N-succinimidyl), -NH-adamantyl, -O-cholest-5-en-3-β-yl, -
NHOY where Y is hydrogen, alkyl, substimted alkyl, aryl, and substimted aryl, -NH(CH2)pCOOY where p is an integer of from 1 to 8 and Y is as defined above, -OCH2NR9R10 where R9 is selected from the group consisting of -C(O)-aryl and -C(O)-substituted aryl and R10 is selected from the group consisting of hydrogen and -CH2COORn where R11 is alkyl, and -NHSO2Z where Z is alkyl, substimted alkyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic;
Q is -C(X)NR7- wherein R7 is selected from the group consisting of hydrogen and alkyl; and X is selected from the group consisting of oxygen and sulfur; and pharmaceutically acceptable salts thereof with the proviso that
A. when R1 is p-methylphenyl, R2 and R3 are joined together with the nitrogen atom bound to R2 and the carbon atom bound to R3 to form a pyrrolidinyl ring, R6 is methoxy, and Q is -C(O)NH-, then R5 is not -CH2CH2COO-t-butyl or -CH2COO-t-butyl.
3. A compound according to Claims 1 or 2 wherein R1 is selected from the group consisting of alkyl, substimted alkyl, aryl, substimted aryl, heterocyclic, substimted heterocylic, heteroaryl and substimted heteroaryl.
4. A compound according to Claim 3 wherein R1 is selected from the group consisting of 4-methylphenyl, methyl, benzyl, n-butyl, 4- chlorophenyl, 1 -naphthyl, 2-naphthyl, 4-methoxyphenyl, phenyl, 2,4,6- trimethylphenyl, 2-(methoxycarbonyl)phenyl, 2-carboxyphenyl, 3,5- dichlorophenyl, 4-trifluoromethylphenyl, 3,4-dichlorophenyl, 3,4- dimethoxyphenyl, 4-(CH3C(O)NH-)phenyl, 4-trifluoromethoxyphenyl, 4- cyanophenyl, isopropyl, 3,5-di-(trifluoromethyl)phenyl, 4-t-butylphenyl, 4-t- butoxyphenyl, 4-nitrophenyl, 2-thienyl, l-N-methyl-3-methyl-5- chloropyrazol-4-yl, phenefhyl, l-N-methylimidazol-4-yl, 4-bromophenyl, 4- amidinophenyl, 4-methylamidinophenyl, 4-[CH3SC(=NH)]phenyl, 5-chloro- 2-thienyl, 2,5-dichloro-4-thienyl, l-N-methyl-4-pyrazolyl, 2-thiazolyl, 5- methyl-l,3,4-thiadiazol-2-yl, 4-[H2NC(S)]phenyl, 4-aminophenyl, 4- fluorophenyl, 2-fluorophenyl, 3-fluorophenyl, 3,5-difluorophenyl, pyridin-3- yl, pyrimidin-2-yl, 4-(3Xdimethylamino-n-propoxy)-phenyl and 1- methylpyrazol-4-yl .
5. A compound according to Claims 1 or 2 wherein R2 is selected from the group consisting of hydrogen, methyl, phenyl, benzyl, -(CH2)2-2- thienyl and -(CH2)2-φ.
6. A compound according to Claims 1 or 2 wherein R1 and R2 together with the nitrogen atom bound to R2 and the SO2 group bound to R1 are joined to form a heterocyclic group or substimted heterocyclic group.
7. A compound according to Claims 1 or 2 wherein R2 and R3 together with the nitrogen atom bound to R2 substiment and the carbon bound to the R3 substiment form a heterocyclic group or a substimted heterocyclic group.
8. A compound according to Claims 1 or 2 wherein R3 is selected from the group consisting of methyl, phenyl, benzyl, diphenylmethyl, -CH2CH2-COOH, -CH2-COOH, 2-amidoethyl, tsσ-butyl, t-butyl, -CH2O- benzyl and hydroxymethyl.
9. A compound according to Claims 1 or 2 wherein R5 is selected from the group consisting of t-butyl-OC(O)CH2-, -CH2C(O)NH2, -CH2CH2C(O)NH2, t-butyl-OC(O)CH2CH2-, BocNH-(CH2)4-, (φ-CH2-OC(O)NH-(CH2)4-, benzyloxy-CH2-, cyclohexyl-CH2-, N-benzylpiperid-4-yl-CH2-, N-Boc-piperidin-4-yl-CH2-,
N-(ρhenylcarbonyl)piperidin-4-yl-CH2-, allyloxy-C(O)NH-(CH2)4-, allyloxy-C(O)NH(CH2)3-, allyloxy-C(O)NH(CH2)2-, φ-CH = , 4-methylphenyl-SO2-N(CH3)CH2C(O)NH(CH2)4-, -CH2C(O)NH(CH2)4φ, -(CH2)4NHC(O)CH2-3-indolyl, -(CH2)4NHC(O)CH2CH2-3-indolyl, -(CH2)4NHC(O)CH2O-4-fluorophenyl, -CH2C(O)NHCH(CH3)φ,
-CH2C(O)NHCH2-(4-dimethylamino)-φ, -CH2C(O)NHCH2-4-nitrophenyl, -CH2CH2C(O)N(CH3)CH2-φ , -CH2C(O)N(CH3)CH2-φ , -CH2CH2C(O)NHCH2CH2-(N-methyl)-2-pyrrolyl, -CH2CH2C(O)NHCH2CH2CH2CH3, -CH2CH2C(O)NHCH2CH2-3-indolyl, -CH2C(O)N(CH3)CH2phenyl, -CH2C(O)NH(CH2)2-(N-methyl)-2-pyrrolyl,
-CH2C(O)NHCH2CH2CH2CH3 , -CH2C(O)NHCH2CH2-3-indolyl , -(CH2)2C(O)NHCH(CH3)φ, -(CH2)2C(O)NHCH2-4-dimethylaminophenyl, -(CH2)2C(O)NHCH2-4-nitrophenyl, -CH2C(O)NH-4-[-NHC(O)CH3-phenyl], -CH2C(O)NH-4-pyridyl, -CH2C(O)NH-4-[dimethylaminophenyl] , -CH2C(O)NH-3-methoxyphenyl, -CH2CH2C(O)NH-4-chlorophenyl,
-CH2CH2C(O)NH-2-pyridyl, -CH2CH2C(O)NH-4-methoxyphenyl, -CH2CH2C(O)NH-3-pyridyl, -(CH2)3NHC(NH)NH-SO2-4-methylphenyl, -(CH2)4NHC(O)NHCH2CH3, -(CH2)4NHC(O)NH-phenyl, -(CH2)4NHC(O)NH-4-methoxyphenyl, -CH2C(O)NHCH2CH2N(CH3)2, [BocNHCH2C(O)NH-]butyl, 2-[4-hydroxy-4-(3-methoxythien-2-yl)piperidin- l-yl]ethyl, 4-[(l-Cbz-piperidin-4-yl)C(O)NH-]butyl, 4-[(N-toluenesulfonylpyrrolidin-2Xyl)C(O)NH-]butyl, 4-[-NHC(O)-4Xpiperidinyl]butyl, N-Cbz-NHCH2-, (CH3)2NC(O)CH2-, and N-Boc-2-aminoethyl .
10. A compound according to Claim 2 wherein R6 is selected from the group consisting of 2,4-dioxo-tetrahydrofuran-3-yl (3,4-enol), methoxy, ethoxy, /sø-propoxy, n-butoxy, t-butoxy, cyclopentoxy, røeø-pentoxy, 2-α- z ø-propyl-4-β-methylcyclohexoxy, 2-β-isopropyl-4-β-methylcyclohexoxy, -NH2, benzyloxy, -NHCH2COOH, -NHCH2CH2COOH, -NH-adamantyl,
-NHCH2CH2COOCH2CH3, -NHSO2-p-CH3-φ, -NHOR8 where R8 is hydrogen, methyl, iso-propyl or benzyl, O-(N-succinimidyl), -O-cholest-5-en-3-β-yl, -OCH2-OC(O)C(CH3)3, -O(CH2)zNHC(O)W where z is 1 or 2 and W is selected from the group consisting of pyrid-3-yl, N- methylpyridyl, and N-methyl-l ,4-dihydro-pyrid-3-yl, -NR"C(O)-R' where R' is aryl, heteroaryl or heterocyclic and R" is hydrogen or -CH2C(O)OCH2CH3.
11. A compound according to Claims 1 or 2 wherein Q is preferably -C(O)NH- or -C(S)NH-.
12. A compound selected from the group consisting of: N-(toluene-4-sulfonyl)-L-prolyl-L-aspartic acid 4-tert-butyl ester
N-(toluene-4-sulfonyl)-L-prolyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(tert-butoxycarbonyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-L-glutamic acid 5-tert-butyl ester
N-(toluene-4-sulfonyl)-L-prolyl-L-glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(carbobenzyloxy)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-O-benzyl-L-serine
N-(toluene-4-sulfonyl)-L-prolyl-β-cyclohexyl-L-alanine
N-(toluene-4-sulfonyl)sarcosyl-β-(N-tert-butoxycarbonylpiperidin-4-yl)- D,L-alanine N-(toluene-4-sulfonyl)sarcosyl-β-(N-benzoylpiperidin-4-yl)-D,L-alanine N-(toluene-4-sulfonyl)sarcosyl-Ne-tert-butoxycarbonyl-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-tert-butoxycarbonyl-D-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(allyloxycarbonyl)-L-lysine
N-(3,5-ditrifluoromethylbenzenesulfonyl)-L-prolyl-Ne- (allyloxycarbonyl)-L-lysine
N-(toluene-4-sulfonyl)sarcosyl-Ne-(allyloxycarbonyl)-L-lysine
N-(toluene-4-sulfonyl)sarcosyl-5-(allyloxycarbonylamino)pentanoic acid
N-(toluene-4-sulfonyl)sarcosyl-4-(allyloxycarbonylamino)butanoic acid
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(allyloxycarbonyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-4-(allyloxycarbonylamino)butanoic acid
N-(toluene-4-sulfonyl)-L-glutaminyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-[N-(toluene-4-sulfonyl)sarcosyl]-L- lysine
N-(toluene-4-sulfonyl)-L-prolyl-(2,3-dehydro)phenylalanine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(4-phenyl)butyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(indol-3-ylacetyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-[3-(indol-3-yl)propionyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-N€-(5-mefhoxyindol-3-carbonyl)-L- lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(4-fluorophenoxyacetyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-R-(l-phenyl)ethyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-S-(l-phenyl)ethyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(4-nitrophenyl)methyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nδ-benzyl-Nδ-methyl-L-glutamine N-(toluene-4-sulfonyl)-L-prolyl-Nδ-2-(l-methylpyrrol-2-yl)ethyl-L- glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Nδ-rø-butyl-L-glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Nδ-2-(indol-3-yl)ethyl-L-glutamine
N-(toluene-4-sulfonyl)sarcosyl-Nγ-benzyl-Nγ-methyl-L-asparagine
N-(toluene-4-sulfonyl)sarcosyl-Nγ-2-(l-methylpyrrol-2-yl)ethyl-L- asparagine
N-(toluene-4-sulfonyl)sarcosyl-Nγ-n-butyl-L-asparagine
N-(toluene-4-sulfonyl)sarcosyl-Nγ-2-(indol-3-yl)ethyl-L-asparagine
N-(toluene-4-sulfonyl)sarcosyl-Nδ-R-(l-phenyl)ethyl-L-glutamine
N-(toluene-4-sulfonyl)sarcosyl-Nδ-S-(l-phenyl)ethyl-L-glutamine
N-(toluene-4-sulfonyl)sarcosyl-Nδ-(4-N,N-dimethylamino- phenyl)methyl-L-glutamine
N-(toluene-4-sulfonyl)sarcosyl-Nδ-(4-nitrophenyl)methyl-L-glutamine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nδ-S-(l-phenyl)ethyl-L- glutamine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nγ-(4-N,N- dimethylaminophenyl)methyl-L-asparagine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nγ-(4- nitrophenyl)methyl-L-asparagine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nγ-benzyl-Nγ-methyl-L- asparagine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nδ-2-(l-methylpyrrol-2- yl)ethyl-L-glutamine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nδ-n-butyl-L-glutamine
N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nδ-2-(indol-3-yl)ethyl-L- glutamine N-(toluene-4-sulfonyl)-N-2-(thien-2-yl)glycinyl-Nδ-R-(l-phenyl)ethyl-L- glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(4-acetamidophenyl)-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(pyrid-4-yl)-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(4-N,N-dimethylaminophenyl)-L- asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(3-methoxyphenyl)-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nδ-(4-chlorophenyl)-L-glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Nδ-(pyrid-2-yl)-L-glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Nδ-(4-methoxyphenyl)-L-glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Nδ-(pyrid-3-yl)-L-glutamine
N-(toluene-4-sulfonyl)-L-prolyl-Nc -(toluene-4-sulfonyl)-L-arginine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(ethylaminocarbonyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(phenylaminocarbonyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(4-methoxyphenylamino-carbonyl)- L-lysine
N-(toluene-4-sulfonyl)-L-(5 ,5-dimethyl)thiaprolyl-Ne-(tert- butoxycarbonyl)-L-lysine methyl ester
N-(toluene-4-sulfonyl)-L-(5,5-dimethyl)thiaprolyl-Ne-(tert- butoxycarbonyl)-L-lysine
N-(toluene-4-sulfonyl)-L-(5,5-dimethyl)thiaprolyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(4-N,N-dimethylamino- phenyl)methyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-(4-N,N-dimethylamino- phenyl)methyl-L-asparagine methyl ester
N-(toluene-4-sulfonyl)-L-prolyl-Nγ-2-(N,N-dimethylamino)ethyl-L- asparagine N-(toluene-4-sulfonyl)-L-prolyl-Ne-(ethylaminocarbonyl)-L-lysine 468
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(N-tert-butoxycarbonylglycinyl)-L- lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-[N-(carbobenzyloxy)iso-nipecotoyl]- L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-N€-(N-toluene-4-sulfonyl-L-prolyl)-L- lysine
N-(toluene-4-sulfonyl)-L-prolyl-Ne-(isonipecotoyl)-L-lysine
N-(toluene-4-sulfonyl)-L-prolyl-3-[N-(carbobenzyl-oxy)amino]propionic acid
N-(toluene-4-sulfonyl)-L-prolyl-Nγ,Nγ-dimethyl-L-asparagine
N-(toluene-4-sulfonyl)-L-prolyl-3-[N-(tert-butoxycarbonyl)amino]-2S- propionic acid methyl ester
N-(toluene-4-sulfonyl)-L-(5-oxo)prolyl-L-asparagine
and pharmaceutically acceptable salts thereof as well as any of the ester compounds recited above wherein one ester is replaced with another ester selected from the group consisting of methyl ester, ethyl ester, n-propyl ester, isopropyl ester, n-butyl ester, isobutyl ester, sec-butyl ester and tert- butyl ester.
13. A method for binding VLA-4 in a biological sample which method comprises contacting the biological sample with a compound of formula A under conditions wherein said compound binds to VLA-4:
R3 O
I II
R1-SO2-Ν(R2)-C-Q-CH-C-R6' A
H R5
where R1 is selected from the group consisting of alkyl, substimted alkyl, aryl, substimted aryl, cycloalkyl, substituted cycloalkyl, heterocyclic, substimted heterocylic, heteroaryl and substimted heteroaryl;
R2 is selected from the group consisting of hydrogen, alkyl, substimted alkyl, cycloalkyl, substimted cycloalkyl, cycloalkenyl, substimted cycloalkenyl, heterocyclic, substituted heterocyclic, aryl, substituted aryl, heteroaryl, substimted heteroaryl, and R1 and R2 together with the nitrogen atom bound to R2 and the SO2 group bound to R1 can form a heterocyclic or a substimted heterocyclic group; R3 is selected from the group consisting of hydrogen, alkyl, substimted alkyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic, substimted heterocyclic and, when R2 does not form a heterocyclic group with R1 , R2 and R3 together with the nitrogen atom bound to R2 and the carbon atom bound to R3 can form a heterocyclic or a substimted heterocyclic group;
R5 is -ALK-X or =CH-Y where ALK is an alkyl group of from 1 to 10 carbon atoms attached via a methylene group (-CH2-) to the carbon atom to which it is attached; X is selected from the group consisting of substimted alkylcarbonylamino, substimted alkenylcarbonylamino, substimted alkynylcarbonylamino, heterocyclylcarbonylamino, substimted heterocyclylcarbonylamino, acyl, acyloxy, aminocarbonyloxy, acylamino, oxycarbonylamino, alkoxycarbonyl, substimted alkoxycarbonyl, aryloxycarbonyl, substimted aryloxycarbonyl, cycloalkoxycarbonyl, substimted cycloalkoxycarbonyl, heteroaryloxycarbonyl, substimted heteroaryloxycarbonyl, heterocyclyloxycarbonyl, substimted heterocyclyloxycarbonyl, cycloalkyl, substimted cycloalkyl, saturated heterocyclic, substimted samrated heterocyclic, substimted alkoxy, substimted alkenoxy, substimted alkynoxy, heterocyclyloxy, substimted heterocycloxy, substimted thioalkyl, substimted thioalkenyl, substimted thioalkynyl, aminocarbonylamino, aminothiocarbonylamino, guanidino, amidino, alkylamidino, thioamidino, halogen, cyano, nitro, -OS(O)2-alkyl, -OS(O)2-substimted alkyl, -OS(O)2-cycloalkyl, -OS(O)2-substimted cycloalkyl, -OS(O)2-aryl, -OS(O)2-substimted aryl, -OS(O)2-heteroaryl, -OS(O)2-substituted heteroaryl, -OS(O)2-heterocyclic, -OS(O)2-substimted heterocyclic, -OSO2-NRR where R is hydrogen or alkyl, -NRS(OValkyl, -NRS(O)2-substimted alkyl, -NRS(O)2-cycloalkyl, -NRS(O)2-substimted cycloalkyl, -NRS(O)2-aryl, -NRS(O)2-substituted aryl, -NRS(O)2-heteroaryl, -NRS(O)2-substimted heteroaryl, -NRS(O)2-heterocyclic, -NRS(O)2- substimted heterocyclic, -NRS(O)2-NR-alkyl, -NRS(O)2-NR-substimted alkyl, -NRS(O)2-NR-cycloalkyl, -NRS(O)2-NR-substimted cycloalkyl, -NRS(O)2-NR-aryl, -NRS(O)2-NR-substimted aryl, -NRS(O)2-NR-heteroaryl, -NRS(O)2-NR-substituted heteroaryl, -NRS(O)2-NR-heterocyclic, -NRS(O)2- NR-substimted heterocyclic where R is hydrogen or alkyl, -S(O)2-alkyl, - S(O)2-substituted alkyl, -S(O)2-aryl,
-S(O)2-substimted aryl, -S(O)2-substituted heteroaryl, -S(O)2-substimted heteroaryl, -S(O)2-heterocyclic, -S(O)2-substituted heterocyclic, mono- and di-(substimted alkyl)amino, N,N-(alkyl, substimted alkyl)amino, N,N-(aryl, substimted alkyl)amino, N,N-(substimted aryl, substimted alkyl)amino, N,N- (heteroaryl, substimted alkyl)amino, N,N-(substimted heteroaryl, substimted alkyl)amino, N,N-(heterocyclic, substimted alkyl)amino, N,N-N,N- (substimted heterocyclic, substimted alkyl)amino, mono- and di- (heterocyclic)amino, mono- and di-(substimted heterocyclic)amino, N,N- (alkyl, heterocyclic)amino, N,N-(alkyl, substituted heterocyclic)amino, N,N- (aryl, heterocyclic)amino, N,N-(substimted aryl, heterocyclic)amino, N,N-
(aryl, substimted heterocyclic)amino, N,N-(substituted aryl, substimted heterocyclic)amino, N,N-(heteroaryl, heterocyclic)amino, N,N-(heteroaryl, substimted heterocyclic)amino, N,N-(substimted heteroaryl, heterocyclic)amino, and N,N-(substituted heteroaryl, substituted heterocyclic)amino; and Y is selected from the group consisting of alkyl, substimted alkyl, aryl, substimted aryl, cycloalkyl, substimted cycloalkyl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic with the proviso that when R5 is =CH-Y then (H) is removed from the formula; R6 is selected from the group consisting of 2,4-dioxo-tetrahydrofuran-3- yl (3,4-enol), hydroxyl, amino, alkoxy, substimted alkoxy, cycloalkoxy, substimted cycloalkoxy, -O-(N-succinimidyl), -NH-adamantyl, -O-cholest-5- en-3-β-yl, -NHOY where Y is hydrogen, alkyl, substimted alkyl, aryl, and substituted aryl, -NH(CH2)pCOOY where p is an integer of from 1 to 8 and Y is as defined above, -OCH2NR9R10 where R9 is selected from the group consisting of -C(O)-aryl and -C(O)-substituted aryl and R10 is selected from the group consisting of hydrogen and -CH2COORn where R11 is alkyl, and - NHSO2Z where Z is alkyl, substimted alkyl, cycloalkyl, substimted cycloalkyl, aryl, substimted aryl, heteroaryl, substimted heteroaryl, heterocyclic and substimted heterocyclic;
Q is -C(X)NR7- wherein R7 is selected from the group consisting of hydrogen and alkyl; and X is selected from the group consisting of oxygen and sulfur; and pharmaceutically acceptable salts thereof with the provisos that
A. when R1 is p-methylphenyl, R2 and R3 are joined together with the nitrogen atom bound to R2 and the carbon atom bound to R3 to form a pyrrolidinyl ring, R6" is hydroxyl, and Q is -C(O)NH-, then R5 is not -CH2C(O)-O-t-butyl or -CH2CH2C(O)-O-t-butyl; B. when R1 is p-methylphenyl, R2 is methyl, R3 is hydrogen, R6 is hydroxyl and Q is -C(O)NH-, then R5 is not -CH2(N-benzylpiperin-4-yl); and
C. when R1 is p-methylphenyl, R2 and R3 are joined together with the nitrogen atom bound to R2 and the carbon atom bound to R3 to form a pyrrolidinyl ring, R6 is methoxy, and Q is -C(O)NH-, then R5 is not -CH2CH2COO-t-butyl or -CH2COO-t-butyl.
14. A pharmaceutical composition comprising a pharmaceutically acceptable carrier and a therapeutically effective amount of one or more compounds of Claim 13.
15. A method for treating an inflammatory disease in a mammalian patient which disease is mediated by VLA-4 which method comprises administering to said patient a therapeutically effective amount of the pharmaceutical composition of Claim 14.
16. The method according to Claim 15 wherein said inflammatory condition is selected from the group consisting of asthma, Alzheimer's disease, atherosclerosis, AIDS dementia, diabetes (including acute juvenile onset diabetis), inflammatory bowel disease (including ulcerative colitis and
Crohn' s disease), multiple sclerosis, rheumatoid arthritis, tissue transplantation, mmor metastasis, meningitis, encephalitis, stroke, and other cerebral traumas, nephritis, retinitis, atopic dermatitis, psoriasis, myocardial ischemia and acute leukocyte-mediated lung injury such as that which occurs in adult respiratory distress syndrome.
EP98937053A 1997-07-31 1998-07-31 Dipeptide and related compounds which inhibit leukocyte adhesion mediated by vla-4 Withdrawn EP1001971A1 (en)

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US90441797A 1997-07-31 1997-07-31
US904417 1997-07-31
PCT/US1998/015325 WO1999006432A1 (en) 1997-07-31 1998-07-31 Dipeptide and related compounds which inhibit leukocyte adhesion mediated by vla-4

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JP2001512135A (en) 2001-08-21
HUP0002495A3 (en) 2001-01-29
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WO1999006432A1 (en) 1999-02-11
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AU8585098A (en) 1999-02-22

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