WO2010075127A1 - Antiviral compounds - Google Patents
Antiviral compounds Download PDFInfo
- Publication number
- WO2010075127A1 WO2010075127A1 PCT/US2009/068207 US2009068207W WO2010075127A1 WO 2010075127 A1 WO2010075127 A1 WO 2010075127A1 US 2009068207 W US2009068207 W US 2009068207W WO 2010075127 A1 WO2010075127 A1 WO 2010075127A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compound
- alkyl
- optionally substituted
- aryl
- halo
- Prior art date
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- 150000001875 compounds Chemical class 0.000 title claims description 344
- 230000000840 anti-viral effect Effects 0.000 title description 5
- 150000002678 macrocyclic compounds Chemical class 0.000 claims abstract description 15
- -1 Ci-balkyl Chemical group 0.000 claims description 183
- 238000006243 chemical reaction Methods 0.000 claims description 92
- 238000000034 method Methods 0.000 claims description 83
- 125000000217 alkyl group Chemical group 0.000 claims description 79
- 125000003118 aryl group Chemical group 0.000 claims description 64
- 125000005843 halogen group Chemical group 0.000 claims description 64
- 150000003839 salts Chemical class 0.000 claims description 39
- 125000003545 alkoxy group Chemical group 0.000 claims description 36
- 239000002253 acid Substances 0.000 claims description 35
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 33
- 239000003814 drug Substances 0.000 claims description 32
- 125000001424 substituent group Chemical group 0.000 claims description 31
- 125000001072 heteroaryl group Chemical group 0.000 claims description 29
- 125000003342 alkenyl group Chemical group 0.000 claims description 27
- 229910052739 hydrogen Inorganic materials 0.000 claims description 27
- 239000001257 hydrogen Substances 0.000 claims description 27
- 125000000304 alkynyl group Chemical group 0.000 claims description 26
- 125000000623 heterocyclic group Chemical group 0.000 claims description 25
- 125000001188 haloalkyl group Chemical group 0.000 claims description 23
- 229910052757 nitrogen Inorganic materials 0.000 claims description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- 125000004432 carbon atom Chemical group C* 0.000 claims description 22
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 21
- 125000001559 cyclopropyl group Chemical group [H]C1([H])C([H])([H])C1([H])* 0.000 claims description 19
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 19
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 17
- 125000003386 piperidinyl group Chemical group 0.000 claims description 17
- 125000002757 morpholinyl group Chemical group 0.000 claims description 16
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 15
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 15
- 239000008194 pharmaceutical composition Substances 0.000 claims description 13
- 125000000719 pyrrolidinyl group Chemical group 0.000 claims description 13
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- 125000005110 aryl thio group Chemical group 0.000 claims description 10
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 10
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 10
- 125000004423 acyloxy group Chemical group 0.000 claims description 9
- 125000004453 alkoxycarbonyl group Chemical group 0.000 claims description 9
- 125000004438 haloalkoxy group Chemical group 0.000 claims description 9
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- 229910052736 halogen Inorganic materials 0.000 claims description 7
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 7
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- 125000004206 2,2,2-trifluoroethyl group Chemical group [H]C([H])(*)C(F)(F)F 0.000 claims description 5
- 239000004480 active ingredient Substances 0.000 claims description 5
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 5
- 229910052794 bromium Inorganic materials 0.000 claims description 5
- 125000001153 fluoro group Chemical group F* 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 125000006272 (C3-C7) cycloalkyl group Chemical group 0.000 claims description 4
- 125000000339 4-pyridyl group Chemical group N1=C([H])C([H])=C([*])C([H])=C1[H] 0.000 claims description 4
- 125000004422 alkyl sulphonamide group Chemical group 0.000 claims description 4
- 125000004421 aryl sulphonamide group Chemical group 0.000 claims description 4
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- 238000005865 alkene metathesis reaction Methods 0.000 claims description 3
- 125000003368 amide group Chemical group 0.000 claims description 3
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- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 125000005842 heteroatom Chemical group 0.000 claims description 3
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- 125000001624 naphthyl group Chemical group 0.000 claims description 3
- 125000003261 o-tolyl group Chemical group [H]C1=C([H])C(*)=C(C([H])=C1[H])C([H])([H])[H] 0.000 claims description 3
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- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 claims description 2
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- 241000711549 Hepacivirus C Species 0.000 abstract description 57
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- 101800001838 Serine protease/helicase NS3 Proteins 0.000 abstract description 4
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- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 21
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical group C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 21
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- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
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- 125000004942 pyridazin-6-yl group Chemical group N1=NC=CC=C1* 0.000 description 1
- PBMFSQRYOILNGV-UHFFFAOYSA-N pyridazine Chemical group C1=CC=NN=C1 PBMFSQRYOILNGV-UHFFFAOYSA-N 0.000 description 1
- 125000000246 pyrimidin-2-yl group Chemical group [H]C1=NC(*)=NC([H])=C1[H] 0.000 description 1
- 125000004527 pyrimidin-4-yl group Chemical group N1=CN=C(C=C1)* 0.000 description 1
- 125000004528 pyrimidin-5-yl group Chemical group N1=CN=CC(=C1)* 0.000 description 1
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- 125000001422 pyrrolinyl group Chemical group 0.000 description 1
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- 238000010791 quenching Methods 0.000 description 1
- 125000001567 quinoxalinyl group Chemical group N1=C(C=NC2=CC=CC=C12)* 0.000 description 1
- 125000004621 quinuclidinyl group Chemical group N12C(CC(CC1)CC2)* 0.000 description 1
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- 229940053146 rebetol Drugs 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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- 229910052703 rhodium Inorganic materials 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical group [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- FGHMGRXAHIXTBM-TWFJNEQDSA-N s-[2-[[(2r,3r,4r,5r)-5-(2-amino-6-oxo-3h-purin-9-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]methoxy-(benzylamino)phosphoryl]oxyethyl] 3-hydroxy-2,2-dimethylpropanethioate Chemical compound C([C@@H]1[C@H]([C@@](C)(O)[C@H](N2C3=C(C(NC(N)=N3)=O)N=C2)O1)O)OP(=O)(OCCSC(=O)C(C)(CO)C)NCC1=CC=CC=C1 FGHMGRXAHIXTBM-TWFJNEQDSA-N 0.000 description 1
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- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 239000003001 serine protease inhibitor Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- JTZZSQYMACOLNN-VDWJNHBNSA-N simeprevir Chemical compound O=C([C@@]12C[C@H]1\C=C/CCCCN(C)C(=O)[C@H]1[C@H](C(N2)=O)C[C@H](C1)OC=1C2=CC=C(C(=C2N=C(C=1)C=1SC=C(N=1)C(C)C)C)OC)NS(=O)(=O)C1CC1 JTZZSQYMACOLNN-VDWJNHBNSA-N 0.000 description 1
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- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 1
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- 235000011152 sodium sulphate Nutrition 0.000 description 1
- SSERCMQZZYTNBY-UHFFFAOYSA-M sodium;3-[(4-hydroxycyclohexyl)-(4-methylcyclohexanecarbonyl)amino]-5-phenylthiophene-2-carboxylate Chemical compound [Na+].C1CC(C)CCC1C(=O)N(C1=C(SC(=C1)C=1C=CC=CC=1)C([O-])=O)C1CCC(O)CC1 SSERCMQZZYTNBY-UHFFFAOYSA-M 0.000 description 1
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- IYWRCNFZPNEADN-CXODAYGWSA-N tert-butyl n-[(2s)-1-[(2s,4r)-2-[[(1r,2s)-1-(cyclopropylsulfonylcarbamoyl)-2-ethenylcyclopropyl]carbamoyl]-4-(6-methoxyisoquinolin-1-yl)oxypyrrolidin-1-yl]-3,3-dimethyl-1-oxobutan-2-yl]carbamate Chemical compound O=C([C@@H]1C[C@H](CN1C(=O)[C@@H](NC(=O)OC(C)(C)C)C(C)(C)C)OC=1C2=CC=C(C=C2C=CN=1)OC)N[C@]1(C(=O)NS(=O)(=O)C2CC2)C[C@H]1C=C IYWRCNFZPNEADN-CXODAYGWSA-N 0.000 description 1
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- 125000003718 tetrahydrofuranyl group Chemical group 0.000 description 1
- 125000005942 tetrahydropyridyl group Chemical group 0.000 description 1
- 125000004927 thianaphthalenyl group Chemical group S1C(C=CC2=CC=CC=C12)* 0.000 description 1
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- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 1
- 125000006000 trichloroethyl group Chemical group 0.000 description 1
- ITMCEJHCFYSIIV-UHFFFAOYSA-M triflate Chemical compound [O-]S(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-M 0.000 description 1
- 125000004044 trifluoroacetyl group Chemical group FC(C(=O)*)(F)F 0.000 description 1
- 125000004205 trifluoroethyl group Chemical group [H]C([H])(*)C(F)(F)F 0.000 description 1
- 229910052722 tritium Inorganic materials 0.000 description 1
- 125000002221 trityl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1C([*])(C1=C(C(=C(C(=C1[H])[H])[H])[H])[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 229960005486 vaccine Drugs 0.000 description 1
- 229950002810 valopicitabine Drugs 0.000 description 1
- HPAPGONEMPZXMM-CMWVUSIZSA-N vaniprevir Chemical compound O=C([C@H]1C[C@@H]2OC(=O)N3CC=4C=CC=C(C=4C3)CCCCC(C)(C)COC(=O)N[C@@H](C(N1C2)=O)C(C)(C)C)N[C@]1(C(=O)NS(=O)(=O)C2CC2)C[C@H]1C=C HPAPGONEMPZXMM-CMWVUSIZSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
- C07D401/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/16—Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
-
- 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
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
- C07D417/14—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing three or more hetero rings
-
- 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
Definitions
- the present invention is concerned with macrocyclic compounds having inhibitory activity on the replication of the hepatitis C virus (HCV). It further concerns compositions comprising these compounds as active ingredients as well as processes for preparing these compounds and compositions.
- HCV hepatitis C virus
- Hepatitis C virus is the leading cause of chronic liver disease worldwide and has become a focus of considerable medical research.
- HCV is a member of the Flavwiridae family of viruses in the hepacivirus genus, and is closely related to the flm ⁇ i ⁇ rus genus, which includes a number of viruses implicated in human disease, such as dengue virus and yellow fever virus, and to the animal pestivirus family, which includes bovine viral diarrhea virus (BVDV).
- HCV is a positive- sense, single- stranded RNA virus, with a genome of around 9,600 bases. The genome comprises both 5' and 3' untranslated regions which adopt RNA secondary structures, and a central open reading frame that encodes a single polyprotein of around 3,010-3,030 amino acids.
- the polyprotein encodes ten gene products which are generated from the precursor polyprotein by an orchestrated series of co- and posttranslational endo proteolytic cleavages mediated by both host and viral proteases.
- the viral structural proteins include the core nucleocapsid protein, and two envelope glycoproteins EI and E2.
- the non-structural (NS) proteins encode some essential viral enzymatic functions (helicase, polymerase, protease), as well as proteins of unknown function. Replication of the viral genome is mediated by an. RNA-dependent RNA polymerase, encoded by nonstructural protein 5b (NS5B).
- HCV In addition to the polymerase, the viral helicase and protease functions, both encoded in the bifunctional NS3 protein, have been shown to be essential for replication of HCV RNA. In addition to the NS3 serine protease, HCV also encodes a metalloproteinase in the NS2 region.
- Chronic hepatitis can progress to liver fibrosis leading to cirrhosis, end-stage liver disease, and HCC (hepatocellular carcinoma), making it the leading cause of liver transplantations.
- HCV type 1 is the predominant genotype in Europe and the US.
- the extensive genetic heterogeneity of HCV has important diagnostic and clinical implications, perhaps explaining difficulties in vaccine development and the lack of response to therapy.
- HCV HCV
- Transmission of HCV can occur through contact "with contaminated blood or blood products, for example following blood transfusion or intravenous drug use.
- the introduction of diagnostic tests used in blood screening has led to a downward trend in post-transfusion HCV incidence.
- the existing infections will continue to present a serious medical and economic burden for decades.
- HCV therapies are based on (pegylated) interferon-alpha (JFN- a) in combination with ribavirin.
- This combination therapy yields a sustained virologic response m more than 40% of patients infected by genotype 1 viruses and about 80% of those infected by genotypes 2 and 3.
- this combination therapy has significant side effects and is poorly tolerated in many patients.
- Major side effects include influenza-like symptoms, hematologic abnormalities, and neuropsychiatric symptoms. Hence there is a need for more effective, convenient and better tolerated treatments.
- HCV protease inhibitors have gained attention as clinical candidates, namely BILN-2061 disclosed in WO00/ 59929 and VX-950 disclosed in WO03/ 87092.
- BILN-2061 disclosed in WO00/ 59929
- VX-950 disclosed in WO03/ 87092.
- a number of similar HCV protease inhibitors have also been disclosed in the academic and patent literature. It has already become apparent that the sustained administration of BILN-2061 or VX-950 selects HCV mutants which are resistant to the respective drug, so called drug escape mutants.
- drug escape mutants have characteristic mutations in the HCV protease genome, notably D168V, D168A and/or
- HCV inhibitors which may overcome the disadvantages of current HCV therapy such as side effects, limited efficacy, the emerging of resistance, and compliance failures.
- the present invention concerns HCV inhibitors which are superior in one or more of the following pharmacological related properties, i.e. potency, decreased cytotoxicity, improved pharmacokinetics, improved resistance profile, acceptable dosage and pill burden.
- the compounds of the present invention have relatively low molecular weight and are easy to synthesize, starting from starting materials that are commercially available or readily available through art-known synthesis procedures.
- WO05/ 010029 discloses aza-peptide macrocyclic Hepatitis C serine protease inhibitors, pharmaceutical compositions comprising the aforementioned compounds for administration to a subject suffering from HCV infection, and methods of treating an HCV infection in a subject by administering a pharmaceutical composition comprising the said compounds.
- the present invention concerns inhibitors of HCV replication, which can be represented by formula (I):
- each dashed line represents an optional double bond
- X is N, CH and where X bears a double bond it is C;
- R 1 is -NH-SO 2 (OR f );
- R 2 is hydrogen, and where X is C or CH, R 2 may also be C ⁇ alkyl;
- R 3 is hydrogen, Chalky 1, Ci- ⁇ alkoxyG- ⁇ alkyl, Ca-zcycloalkyl; 5 R 4 is aryl or Het; n is 3, 4, S 7 or 6; carbon atoms bearing four substituents and including at least one bond to hydrogen in a compound of structure (T) may optionally have one or more of their hydrogen atoms replaced by halo where the halo can be F, Cl, Br or I, 0 preferably F;
- R 5 represents halo, polyhaloG-calkyl, phenyl, or Het
- R 6 represents Ci ⁇ alkoxy, mono- or di-Ci-6alkylamino
- R 7 is hydrogen; aryl; Het; C3-7cycloalkyl optionally substituted with Ci- 6alkyl; or Ci-6alkyl optionally substituted with C3-7cycloalkyl, aryl or with Het;
- R 8 is aryl; Het; CVzcycloalkyl optionally substituted with Ci-t,alkyl; or Ci- t > alkyl optionally substituted with Cvzcycloalkyl, aryl or with Het; aryl as a group or part of a group is phenyl or naphthyl optionally substituted with one, two or three substituents selected from halo, hydroxy, nitro, cyano, carboxyl, Ci- ⁇ alkyl, Ci- ⁇ alkoxy, amino, mono- or di-Ci- ⁇ alkylamino, azido, mercapto, polyhaloCi-ealkyl, polyhaloCi- ⁇ alkoxy, C ⁇ cycloalkyl, pyrroli
- Het as a group or part of a group is a 5 or 6 membered saturated, partially unsaturated or completely unsaturated heterocyclic ring containing 1 to 4 heteroatoms each independently selected from nitrogen, oxygen and sulfur, said heterocyclic ring being optionally condensed with a benzene ring; and Het as a whole being optionally substituted with one, two or three substituents each independently selected from the group consisting of halo, hydroxy, nitro, cyano, carboxyl, d- ⁇ alkoxy, Ci -6 alkoxyCi- ⁇ alkyl, Ci- 6alkylcarbonyl, amino, mono- or di-Ci-ealkylammo, azido, mercapto, poIyhaIoCi-6alkyl, polyhaloCn-,alkoxy, C3-7cycloalkyl, pyrrolidinyl, piperidinyl, piperazinyl,4-Ci-6alkylpiperazinyl, 4-Ci ⁇
- MM is CO or a bond
- XX is O, NH, N(Ci -4 ) alkyl), a bond, or CH 2 ;
- a 3 is independently selected from PRT, H, -OH, -C(O)OH, cyano, alkyl, alkenyl, alkynyl, amino, amido, imido, imino, halogen, CF3, CH2CF3, cycloalkyl, nitro, aryl, aralkyl, alkoxy, aryloxy, heterocycle, -C(A 2 )3, -C(A 2 ) 2 - C(O)A 2 , -C(O)A 2 , -C(O)OA 2 , -O(A 2 ), -N(A 2 J 2 , -S(A 2 ), -CH 2 P(Y 1 ) (A 2 ) ((W), -CH 2 P(Y 1 )(A 2 )(N(A 2 ) 2 ), "CH 2 P(Y
- a 2 is independently selected from PRX ⁇ H, alkyl, alkenyl, alkynyl, amino, amino acid, alkoxy, aryloxy, cyano, haloalkyl, cycloalkyl, aryl, heteroaryl, heterocycle, alkylsulfonamide, or arylsulfonamide, wherein each A 2 is optionally substituted with A 3 ;
- R 111 is independently selected from H, alkyl, alkenyl, alkynyl, aryl, cycloalkyl, heterocycle, halogen, haloalkyl, alkylsulfonamido, arylsulfonamido, -C ⁇ O)NHS(O)2-, or -S(O)2-, optionally substituted with one or more A 3 ;
- Y 1 is independently O, S, N(A 3 ), N(O)(A 3 ), N(OA 3 ), N(O)(OA 3 ) or m is 0 to 6; r is 0 to 6.
- AA is independently N or CH.
- the invention further relates to methods for the preparation of the compounds of formula (I), the N-oxides, addition salts, quaternary amines, metal complexes, and stereochemically isomeric forms thereof, their intermediates, and the use of the intermediates in the preparation of the compounds of formula (I).
- the invention relates to the compounds of formula (1) per se, the N- oxides, addition salts, quaternary amines, metal complexes, and stereochemical ⁇ isomeric forms thereof, for use as a medicament.
- the invention further relates to pharmaceutical compositions comprising a carrier and an anti-virally effective amount of a compound of formula (I) as specified herein.
- the pharmaceutical compositions may comprise combinations of the aforementioned compounds with other anti-HCV agents.
- the invention further relates to the aforementioned pharmaceutical compositions for administration to a subject suffering from HCV infection.
- the invention also relates to the use of a compound of formula (I), or a N-oxide, addition salt, quaternary amine, metal complex, or stereochemically isomeric forms thereof, for the manufacture of a medicament for inhibiting HCV replication.
- the invention relates to a method of inhibiting HCV replication in a warm-blooded animal, said method comprising the administration of an effective amount of a compound of formula (I), or a prodrug, N-oxide, addition salt, quaternary amine, metal complex, or stereochemically isomeric forms thereof.
- the compounds of the invention have inhibitory activity toward HCV protease.
- halo is generic to fluoro, chloro, bromo and iodo.
- polyhaloCi- ⁇ alkyl as a group or part of a group, e.g. in polyhaloCi- ⁇ alkoxy, is defined as mono- or poly halo substituted Q-calkyl, in particular O-ealkyl substituted with up to one, two, three, four, five, six, or more halo atoms, such as methyl or ethyl with one or more fluoro atoms, for example, difluoromethyl, trifluoromethyl, trifluoroethyl. Preferred is trifluoromethyl.
- perfluoroQ ⁇ alkyl groups are C 1- ealkyl groups wherein all hydrogen atoms are replaced by fluoro atoms, e.g. pentafluoroethyl.
- fluoro atoms e.g. pentafluoroethyl.
- the halogen atoms may be the same or different.
- a group or part of a group defines straight or branched chain saturated hydrocarbon radicals having from 1 to 4 carbon atoms such as for example methyl, ethyl, 1 -propyl, 2-propyl, 1 -butyl, 2-butyl, 2-methyl-l-propyl; encompasses d-jalkyl radicals and the higher homologues thereof having 5 or 6 carbon atoms such as, for example, 1- pentyl, 2-pentyl, 3-pentyl, 1-hexyl, 2-hexyl, 2-methyl-I -butyl, 2-methyl-I - pentyl, 2-ethyl-l-butyl, 3-methyl-2-pentyl, and the like.
- Ci-6alkyl is Ci-4 alkyl.
- C2-oalkenyl as a group or part of a group defines straight and branched chained hydrocarbon radicals having saturated carbon-carbon bonds and at least one double bond, and having from.2 to 6 carbon atoms, such as, for example, ethenyl (or vinyl), 1-propenyl, 2-propenyl (or allyl), 1- butenyl, 2-butenyl, 3-butenyl, 2-methyl2-propenyl, 2-pentenyl, 3-pentenyl, 2- hexenyl, 3-hexenyl, 4-hexenyl, 2-methyl-2-butenyl, 2-methyl-2-pentenyl and the like.
- C2- ⁇ alkenyl is C2-4alkenyl.
- C2-6alkynyl as a group or part of a group defines straight and branched chained hydrocarbon radicals having saturated carbon-carbon bonds and at least one triple bond, and having from 2 to 6 carbon atoms, such as, for example, ethynyl, 1-propynyl, 2-propynyl, 1-butynyl, 2-butynyL 3- butynyL 2-pentynyl, 3-pentynyl, 2-hexynyl, 3-hexynyl and the like.
- Ci- ⁇ alkynyl is C2-4alkynyl
- Quzcycloalkyl is generic to cyclopropyL cyclobutyl, cyclopentyl / cyclohexyl and cycloheptyl,
- Ci- ⁇ alkanediyl defines bivalent straight and branched chain saturated hydrocarbon radicals having from 1 to 6 carbon atoms such as, for example, methylene, ethylene, 1,3-propanediyl, 1,4 -butane diyl, 1,2-propanediyl, 2,3- butanediyl, 1,5-pentanediyl, 1,6-hexanediyl and the like.
- Of interest amongst Ci ⁇ 6alkanediyl is Oalkanediyl.
- Ci-6alkoxy means d-6aikyloxy wherein is as defined above.
- the carbon atom to which the oxo is linked is a staturated carbon
- Het is a heterocycle as specified in this specification and claims. Preferred amongst the Het radicals are those that are monocyclic.
- Het comprise, for example, pyrrolidinyl, piperidinyl, morpholinyl, thiomorpholinyl, piperazinyl, pyrrolyl, pyrazoly 1, imidazolyl, oxazolyl, isoxazolyl, thiazinolyl, isothiazinolyl, thiazolyl, isothiazolyl, oxadiazolyl, thiadiazolyl, tilazolyl (including 1,2,3-triazolyl, 1,2,4-triazolyl), tetrazolyl, furanyl, thienyL pyridyl, pyrimidyL pyridazinyL triazinyl, and the like.
- the Het radicals are those which are non-saturated, in particular those having an aromatic character. Of further interest are those Het radicals having one or two nitrogens.
- Het radicals mentioned in this and the following paragraph may be optionally substituted with the number and kind of substituents mentioned in the definitions of the compounds of formula (I) or any of the subgroups of compounds of formula (I).
- Some of the Het radicals mentioned in this and the following paragraph may be substituted with one, two or three hydroxy substituents.
- Such hydroxy substituted rings may occur as their tautomeric form's bearing keto groups.
- a 3-hydroxypyridazine moiety can occur in its tautomeric form 2H-pyridazin-3-one.
- Het is piperazinyl, it preferably is substituted in its 4-position by a substituent linked to the 4-nitrogen with a carbon atom, e.g. 4-Ci-f>alkyl, 4-polyhaloQ- h alkyl, Ci- ⁇ alkoxyO- ⁇ alkyl,
- Het radicals comprise, for example pyrrolidinyl, piperidinyl, morpholinyl, thiomorpholinyl, piperazinyl, pyrrolyl, pyrazolyl, imidazolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, oxadiazolyl, thiadiazolyl, triazolyl (including 1,2,3-triazolyl, 1,2,4-triazolyl), tetrazolyl, furanyl, thienyl, pyridyl, pyrimidyl, pyridazinyl, pyrazolyl, triazinyl, or any of such heterocycles condensed with a benzene ring, such as indolyl, indazolyl (in particular IH-indazolyl), indolinyl, quinolinyl, tetrahydroquinolinyl (in particular 1,2,3,4
- Het radicals pyrrolidinyl, piperidinyl, morpholinyl, thio morpholinyl, piperazinyl, 4-substituted piperazinyl preferably are linked via their nitrogen atom (i.e. 1 -pyrrolidinyl, 1 -piperidinyl, 4-thiomorpholmyl, 4-morpholinyl, 1 -piperazinyl, 4-substituted 1 -piperazinyl).
- radical positions on any molecular moiety used in the definitions may be anywhere on such moiety as long as it is chemically stable.
- Heterocycle as used herein includes by way of example and not limitation these heterocycles described in Paquette, Leo A.; Principles of Modern Heterocyclic Chemistry (W. A. Benjamin, New York, 1968), particularly Chapters 1, 3, 4, 6, 7, and 9; The Chemistry of Heterocyclic Compounds, A Series of Monographs” (John Wiley & Sons, New York, 1950 to present), in particular Volumes 13, 14, 16, 19, and 28; and /. Am. Chem. Soc. (1960) 82:5566.
- “heterocycle” includes a "carbocycle” as defined herein, wherein one or more (e.g. 1, 2, 3, or 4) carbon atoms have been replaced with a heteroatom (e.g.
- heterocycles include by way of example and not limitation pyridyl, dihydroypyridyl, tetrahydropyridyl (piperidyl), thiazolyl, tetrahydrothiophenyl, sulfur oxidized tetrahydrothiophenyl, pyrimidmyl, furanyl, thienyl, pyrrolyL pyrazolyl, imidazolyl, tetrazolyl, benzofuranyl, thianaphthalenyl, indolyl, indolenyl, quinolinyl, isoquinolinyl, benzimidazolyl, piperidinyl, 4-piperidonyl, pyrrolidinyl, 2-pyrrolidonyl, pyrrolinyl, tetrahydrofuranyl, tetrahydroquinolinyl, tetrahydroisoquinolinyl, decahydr
- carbon bonded heterocycles are bonded at position 2, 3, 4, 5, or 6 of a pyridine, position 3, 4, 5, or 6 of a pyridazine, position 2, 4, 5, or 6 of a pyrimidine, position 2, 3, 5, or 6 of a pyrazine, position 2, 3, 4, or 5 of a furan, tetrahydrofuran, thiofuran, thiophene, pyrrole or tetrahydropyrrole, position 2, 4, or 5 of an oxazole, imidazole or thiazole, position 3, 4, or 5 of an isoxazole, pyrazole, or isothiazole, position 2 or 3 of an aziridine, position 2, 3, or 4 of an azetidine, position 2, 3, 4, 5, 6, 7, or 8 of a quinoline or position 1, 3, 4, 5, 6, 7, or 8 of an isoquinoline.
- carbon bonded heterocycles include 2- pyridyl, 3-pyridyl, 4-pyridyl, 5-pyridyl, 6-pyridyl, 3-pyridazinyl, 4- pyridazinyl, 5-pyridazinyl, 6-pyridazinyl, 2-pyrimidinyl, 4-pyrimidinyl, 5- pyrimidinyl, 6-pyrimidinyl, 2-pyraziny ⁇ , 3-pyrazinyl, 5-pyrazinyl, 6- pyrazinyl, 2-thiazolyl, 4-thiazolyl, or 5-thiazolyl.
- nitrogen bonded heterocycles are bonded at position 1 of an aziridine, azetidine, pyrrole, pyrrolidine, Z- pyrroline, 3-pyrroline, imidazole, imidazolidine, 2- imidazoline, 3- imidazoline, pyrazole, pyrazolone, 2-pyrazoline, 3-pyrazoline, piperidine, piperazine, indole, indoline, IH-indazole, position 2 of a isoindole, or isoindoline, position 4 of a morpholine, and position 9 of a carbazole, or ⁇ - carboline.
- nitrogen bonded heterocycles include 1- aziridyl, 1-azetedyl, 1-pyrrolyl, 1-imidazolyl, 1-pyrazolyl, and 1- piperidinyl.
- Carbocycle refers to a saturated, unsaturated or aromatic ring having up to about 25 carbon atoms.
- a carbocycle typically has about 3 to 7 carbon atoms as a monocycle, about 7 to 12 carbon atoms as a bicycle, and up to about 25 carbon atoms as a polycycle.
- Monocyclic carbocycles typically have 3 to 6 ring atoms, still more typically 5 or 6 ring atoms.
- Bicyclic carbocycles typically have 7 to 12 ring atoms, e.g., arranged as a bicyclo [4,5], [5,5], [5,6] or [6,6] system, or 9 or 10 ring atoms arranged as a bicyclo [5,6] or [6,6] system.
- carbocycle includes "cycloalkyl" which is a saturated or unsaturated carbocycle.
- monocyclic carbocycles include cyclopropyl, cyclobutyl, cyclopentyl, 1-cyclopent-l-enyl, 1- cyclopent-2-enyl, 1- cyclopent- 3-enyl, cyclohexyl, 1-cyclohex-l-enyl, l-cyclohex-2-enyl, 1- cyclohex-3-enyl, phenyl, spiryl and naphthyl.
- PRT is selected from the terms “prodrug moiety” and
- Radicals used in the definitions of the variables include all possible isomers unless otherwise indicated.
- pyridyl includes 2-pyi ⁇ dyl, 3-pyridyl and 4-pyridyl
- pentyl includes 1-pentyl, 2-pentyl and 3-pentyl.
- a 3 , A 2 and R 111 are all recursive substituents in certain embodiments. Typically, each of these may independently occur 20, 19, 18, 1.7, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, or 0, times in a given embodiment. More typically, each of these may independently occur 12 or fewer times in a given embodiment.
- a compound described herein is substituted with more than one of the same designated group, e.g., "R 111 " or "A 3 ", then it will be understood that the groups may be the same or different, i.e., each group is independently selected. Wavy lines indicate the site of covalent bond attachments to the adjoining groups, moieties, or atoms.
- each definition is independent.
- One embodiment comprises the compounds of formula (I) or any subgroup of compounds of formula (I) specified herein, as well as the N-oxides, salts, as the possible stereoisomeric forms thereof.
- Another embodiment comprises the compounds of formula (I) or any subgroup of compounds of formula (I) specified herein, as well as the salts as the possible stereoisomeric forms thereof.
- stereochemicallv isomeric forms as used herein defines all the possible compounds made up of the same atoms bonded by the same sequence of bonds but having different three-dimensional structures which are not interchangeable, which the compounds of formula (I) may possess.
- the chemical designation of a compound encompasses the mixture of all possible stereochemically isomeric forms, which said compound may possess. Said mixture may contain all diastereomers and/or enantiomers of the basic molecular structure of said compound. All stereochemically isomeric forms of the compounds of the present invention both in pure form or mixed with each other are intended to be embraced within the scope of the present invention.
- stereoisomerically pure concerns compounds or intermediates having a stereoisomeric excess of at least 80% (i.e. minimum 90% of one isomer and maximum 10% of the other possible isomers) up to a stereoisomeric excess of 100% (i.e.
- Pure stereoisomeric forms of the compounds and intermediates of this invention may be obtained by the application of art-known procedures.
- enantiomers may be separated from each other by the selective crystallization of their diastereomeric salts with optically active acids or bases. Examples thereof are tartaric acid, dibenzoyltartaric acid, ditoluoyltartaric acid and campho sulfonic acid.
- enantiomers may be separated by chromatographic techniques using chiral stationary phases.
- Said pure stereochemical ⁇ isomeric forms may also be derived from the corresponding pure stereochemically isomeric forms of the appropriate starting materials, provided that the reaction occurs stereospecifically.
- said compound will be synthesized by stereospecific methods of preparation. These methods will advantageously employ enantiomerically pure starting materials.
- the diastereomeric racemates of the compounds of formula (1) or (II) can be obtained separately by conventional methods.
- Appropriate physical separation methods that may advantageously be employed are, for example, selective crystallization arid chromatography, e.g. column chromatography.
- a person skilled in the art is able to determine the absolute configuration of such compounds using art-known methods such as, for example, X-ray diffraction.
- the present invention is also intended to include all isotopes of atoms occurring on the present compounds.
- Isotopes include those atoms having the same atomic number but different mass numbers.
- isotopes of hydrogen include tritium and deuterium.
- isotopes of carbon include C-13 and C-1.4.
- prodrug as used throughout this text means the pharmacologically acceptable derivatives such as esters, amides and phosphates, such that the resulting in vivo biotransformation product of the derivative is the active drug as defined in the compounds of formula (I) or (II).
- Prodrugs preferably have excellent aqueous solubility, increased bioavailability and are readily metabolized into the active inhibitors in vivo.
- Prodrugs of a compound of the present invention may be prepared by modifying functional groups present in the compound in such a way that the modifications are cleaved, either by routine manipulation or in vivo, to the parent compound.
- ester prodrugs that are hydrolysable in vivo and are derived from those compounds of formula (I) or (II) having a hydroxy or a carboxyl group.
- An in vivo hydrolysable ester is an ester, which is hydrolysed in the human or animal body to produce the parent acid or alcohol.
- esters for carboxy include G - ⁇ alkoxy methyl esters for example methoxy methyl, C 1- ⁇ alkanoyloxymethyl esters for example pivaloyloxymethyl, phthalidyl esters, C3-8CycloalkoxycarbonyloxyCi-6alkyl esters for example 1- cyclohexylcarbonyloxy ethyl; l,3-dioxolen-2-onylmethyl esters for example 5- methyl -l,3-dioxolen-2-onylmethyl; and Cnsalkoxycarbonyloxy ethyl esters for example 1-methoxycarbonyloxy ethyl which may be formed at any carboxy group in the compounds of this invention.
- An in vivo hydrolysable ester of a compound of the formula (I) or (II) containing a hydroxy group includes inorganic esters such as phosphate esters and a-acyloxyalkyl ethers and related compounds which as a result of the in vivo hydrolysis of the ester breakdown to give the parent hydroxy group.
- inorganic esters such as phosphate esters and a-acyloxyalkyl ethers and related compounds which as a result of the in vivo hydrolysis of the ester breakdown to give the parent hydroxy group.
- a-acyloxyalkyl ethers include acetoxymethoxy and 2,2- dimethylpropionyloxymethoxy.
- a selection of in vivo hydrolysable ester forming groups for hydroxy include alkanoyl, benzoyl, phenylacetyl and substituted benzoyl and phenylacetyl, alkoxycarbonyl (to give alkyl carbonate esters), dialkylcarbamoyl and N ⁇ dialkyIaminoethyl)-N-alkylcarbamoyl (to give carbamates), dialkylamiiioacetyl and carboxyacetyl
- substituents on benzoyl include morpholino and piperazino linked from a ring nitrogen atom via a methylene group to the 3- or 4- position of the benzoyl ring.
- salts of the compounds of formula (I) or (II) are those wherein the counter-ion is pharmaceutically acceptable.
- salts of acids and bases which are non- pharmaceutically acceptable may also find use, for example, in the preparation or purification of a pharmaceutically acceptable compound.
- AU salts, whether pharmaceutically acceptable or not are included within the ambit of the present invention.
- the pharmaceutically acceptable acid and base addition salts as mentioned hereinabove are meant to comprise the therapeutically active nontoxic acid and base addition salt forms which the compounds of formula (I) or (II) are able to form.
- the pharmaceutically acceptable acid addition salts can conveniently be obtained by treating the base form with such appropriate acid.
- Appropriate acids comprise, for example, inorganic acids such as hydrohalic acids, e.g. hydrochloric or hydrobromic acid, sulfuric, nitric, phosphoric and the like acids; or organic acids such as, for example, acetic, propanoic, hydroxyacetic, lactic, pyruvic, oxalic (i.e. ethanedioic), malonic, succinic (i.e.
- butanedioic acid maleic, fumaric, malic (i.e. hydroxybutanedioic acid), tartaric, citric, methane sulfonic, ethanesulfonic, benzene sulfonic, p- toluenesulfonic, cyclamic, salicylic, p-aminosalicylic, pamoic and the like acids.
- salt forms can be converted by treatment with an appropriate base into the free base form.
- the compounds of formula (I) or (II) containing an acidicproton may also be converted into their non-toxic metal or amine addition salt forms by treatment with appropriate organic and inorganic bases.
- Appropriate base salt forms comprise, for example, the ammonium salts, the alkali and earth alkaline metal salts, e.g. the lithium, sodium, potassium, magnesium, calcium salts and the like, salts with organic bases, e.g. the benzathine, N-methyl-D- glucamine, hydrabamine salts, and salts with amino acids such as, for example, arginine, lysine and the like.
- addition salt as used heremabove also comprises the solvates which the compounds of formula (I) or (II) as well as the salts thereof, are able to form.
- solvates are for example hydrates, alcoholates and the like.
- quaternary amine as used hereinbefore defines the quaternary ammonium salts which the compounds of formula (I) or (II) are able to form by reaction between a basic nitrogen of a compound of formula (I) or (II) and an appropriate quaternizing agent, such as, for example, an optionally substituted alkylhalide, arylhalide or arylalkylhalide, e.g. methyh ' odide or benzyliodide.
- Other reactants with good leaving groups may also be used, such as alkyl trifluoromethanesulfonates, alkyl methanesulfonates, and alkyl p-toluenesulfonates.
- a quaternary amine has a positively charged nitrogen.
- Pharmaceutically acceptable counter ions include chloro, bromo, iodo, trifluoroacetate and acetate.
- the coimterion of choice can be introduced using ion exchange resins.
- N-oxide forms of the present compounds are meant to comprise the compounds of 5 formula (I) or (II) wherein one or several nitrogen atoms are oxidized to the so-called N-oxide.
- the compounds of formula (I) or (II) may have metal binding, chelating, complex forming properties and therefore may exist as metal complexes or metal chelates.
- Such metalated derivatives of the compounds of formula (I) or (II) are intended to be included within the scope of the present invention.
- the compounds of formula (I) or (II) have several asymmetric centers. In order to more efficiently refer to each of these asymmetric centers, the numbering system as indicated in the following representative structural formula will be used.
- Asymmetric centers are present at positions 1, 4 and 6 of the macrocycle as well as at the carbon atom 3' in the 5-membered ring, carbon atom 2' when the R 2 substituent is Chalky L and at carbon atom V when X is CH. Each of these asymmetric centers can occur in their R or S configuration.
- the stereochemistry at position 1 preferably corresponds to that of an L-amino acid configuration, i.e. that of L-proline.
- the 2 carbonyl groups substituted at positions V and 5' of the cyclopentane ring preferably are in a trans configuration.
- the carbonyl substituent at position 5' preferably is in that configuration that corresponds to an L-proline configuration.
- the carbonyl groups substituted at positions 1' and 5' preferably are as depicted below in the structure of the following formula:
- the compounds of formula (I) or (II) include a cyclopropyl group as represented in the structural fragment below:
- C7 represents the carbon at position 7 and carbons at position 4 and 6 are asymmetric carbon atoms of the cyclopropane ring.
- the presence of these two asymmetric centers means that the compounds can exist as mixtures of diastereomers, such as the diastereomers of compounds of formula (I) or (II) wherein the carbon at position 7 is configured either syn to the carbonyl or syn to the amide as shown below.
- One embodiment concerns compounds of formula (I) or (II) wherein the carbon at position 7 is configured syn to the carbonyl.
- Another embodiment concerns compounds of formula (I) or (II) wherein the configuration at the carbon at position 4 is R.
- a specific subgroup of compounds of formula (1) or (II) are those wherein the carbon at position 7 is configured syn to the carbonyl and wherein the configuration at the carbon at position 4 is R.
- the compounds of f ormula (1) or (II) may include as well a proline residue (when X is N) or a cyclopentyl or cyclop eiitenyl residue (when X is CH or C).
- Preferred are the compounds of formula (I) or (II) wherein the substituent at the 1 (or 5') position and the substituent at position 3' are in a trans configuration.
- position 1 has the configuration corresponding to L-prolrne and the substituent at position 3' is in a trans configuration in respect of position 1.
- the compounds of formula (I) or (II) have the stereochemistry as indicated in the structures of formulae (I-a) and (I-b) below:
- R 2 is hydrogen
- One embodiment of the present invention concerns compounds of formula (I) or (II) or of formulae (I-a), (I-b), or of any subgroup of compounds of formula (I) or (II), wherein one or more of the following conditions apply: (a) R 2 is hydrogen;
- the double bond between carbon atoms 7 and 8 in the compounds of formula (I) or (II), or in any subgroup of compounds of formula (I) or (II), maybe in a cis or in a trans configuration.
- the double bond between carbon atoms 7 and 8 is in a cis configuration, as depicted in formulae (I-c) and (I-d).
- a double bond between carbon atoms Y and 2' maybe present in the compounds of formula (I) or (II), or in any subgroup of compounds of formula (I) or (II), as depicted in formula (I-e) below.
- n 2
- n 3
- n 4
- n 4
- n 4
- n 4
- the moiety - CH2- bracketed by "n” corresponds to butanediyl in the compounds of formula (I) or (II) or in any subgroup of compounds of formula (I) or (II).
- n When n is 5, the moiety -CH2 bracketed by "n” corresponds to pentanediyl in. the compounds of formula (I) or (II) or in any subgroup of compounds of formula (I) or (II). When n is 6, the moiety -CHi- bracketed by "n” corresponds to hexanediyl in the compounds of formula (I) or (II) or in any subgroup of compounds of formula (I) or (II). Particular subgroups of the compounds of formula (I) or ( ⁇ I) are those compounds wherein n is 4 or 5.
- Embodiments of the invention are compounds of formula (I) or (II) or any of the subgroups of compounds of formula (I) or (II).
- R f is H, alkyl, alkenyl, alkynyl, aryl, heteroaryl, or cycloalkyl, which R f is optionally substituted with one or more Rg;
- each Rh and Rj is independently H, alkyl, or haloalkyl; and Rd and Re are each independently H, (Cl -10) alkyl, or aryl , which is optionally substituted with one or more halo;
- R f is alkyl, aryl, cycloalkyl, which R f is optionally substituted with one or more Rs independently selected from alkyl, halo,, or trifluoromethyl, wherein each alkyl of R ⁇ is optionally substituted with one or more halo, alkoxy, or cyano.
- R f is aryl, heteroaryl, or cycloalkyl, which R f is optionally substituted with one to three A 3 .
- R f is cyclopropyl which R 1 is optionally substituted by up to four A 3 .
- R f is cyclopropyl which R f is optionally substituted by one A 3 .
- R f is H, alky L alkenyl, alkynyl, aryl, heteroaiyl, or cycloalkyl, which R f is optionally substituted with one or more R g ;
- each Rh and Ri is independently H, alkyl, or haloalkyl.
- R / is H, alkyl, alkenyl, alkynyl, aryl, heteroaryl, or cycloalkyl, which R f is optionally substituted with one or more R g ;
- each Rg is independently H, alkyl, alkenyl, alkynyl, halo, hydroxy, cyano, arylthio, cycloalkyl, aryl, heteroaryl, alkoxy, NRhRi, wherein each aryl and heteroaryl is optionally substituted with one or more alkyl, halo, hydroxy, cyano, nitro, amino, alkoxy, alkoxycarbonyl, alkanoyloxy, haloalkyl, or haloalkoxy;
- each Rh and Ri is independently H, alkyl, or haloalkyl
- R f is phenyl, cyclopropyl, 2- fluorophenyl, 4- chlorophenyl, 2-chlorophenyI, 2,6-dimethylphenyl, 2- methylphenyl, 2,2-dimethylpropyl, 2,2- difluoroethyl, 2,2,2-trifluoroethyl, or l-methylcyclopropyl.
- R 1 is cyclopropyl
- R f is l-methylcyclopropyl.
- compounds of formula (I) or (II) or any of the subgroups of compounds of formula (I) or (II) wherein carbon atoms bearing four substituents and including at least one bond to hydrogen in a compound of structure (I) or (II) may optionally have one or more of their hydrogen atoms replaced by halo where the halo can be F, Cl, Br or I, preferably F.
- R 2 is hydrogen
- R 2 is C 1 -6 alkyl, preferably methyl.
- Embodiments of the invention are compounds of formula. (I) or (II) or any of the subgroups of compounds of formula (I) or (II) wherein
- X is N, C (X being linked via a double bond) or CH (X being linked via a single bond) and R 2 is hydrogen;
- X is C (X being linked via a double bond) and R 2 is Ci- ⁇ alkyl, preferably methyl.
- R 3 is Ci-ealkyl
- R 3 is Ci- ⁇ alkoxyCi-balkyl or Cs ⁇ cycloa ⁇ kyl.
- Preferred embodiments of the invention are compounds of formula (1) or (11) or any of the subgroups of compounds of formula (I) or (II) wherein R 3 is hydrogen, or Ci -6 alkyl more preferably hydrogen or methyl.
- Embodiments of the invention are compounds of formula (I) or (II) or any of the subgroups of compounds of formula (I) or (II) wherein R 4 is aryl or Het, each independently, optionally substituted with any of the substituents of Het or aryl mentioned in the definitions of the compounds of formula (I) or (II) or of any of the subgroups of compounds of formula (I) or (II); or specifically said aryl or Het being each, independently, optionally substituted with Ci-6alkyl, halo, amino, mono- or di-Ci ⁇ alkylamino, pyrrolidinyl, piperidinyl, morpholinyl, piperazinyl, 4-Ci- ⁇ alkylpiperazinyl; and wherein the morpholinyl and piperidinyl groups may optionally substituted with one or two Ci-e, alkyl radicals;
- Embodiments of the invention are compounds of formula (I) or (II) or any of the subgroups of compounds of formula (I) or (II) wherein R 4 is a radical
- each R 4a in any of the R 4 substituents may be selected from those mentioned as possible substituents on Het, as specified in the definitions of the compounds of formula (I) or (II) or of any of the subgroups of compounds of formula (I) or (II);
- each R 4a may be hydrogen, halo, Q- ⁇ alkyl, amino, or mono- or di-Ci- ⁇ alkylamino, pyrrolidinyl, piperidmyl, morpholinyl, piperazinyl, 4-Ci-6alkyI-piperazinyl; and wherein the morpholinyl and piperidinyl groups may optionally substituted with one or two O-ealkyl radicals;
- each each R 4a is, each independently, hydrogen, halo, Ci-6alkyl, amino, or mono- or
- R 4a is substituted on a nitrogen atom, it preferably is a carbon containing 5 substituent that is connected to the nitrogen via a carbon atom or one of its carbon atoms; and wherein in that instance R 4a preferably is Ci-ealkyl.
- Embodiments of the invention are compounds of formula (I) or (II) or any of the subgroups of compounds of formula (I) or (II) wherein R 4 is phenyl or pyridiyl (in particular 4-pyridyl) which each may be substituted with 1, 2 or 3 substituents selected from those mentioned for aryl in the definitions of the compounds of formula (I) or (II) or of any of the subgroups thereof.
- said phenyl or pyridyl is substituted with 1-3 (or with 1-2, or with one) substituent or substituents selected from halo, Ci- ⁇ alkyl or Ci- ⁇ alkoxy.
- Embodiments of the invention are compounds of formula (I) or (II) or any of the subgroups of compounds of formula (I) or (II) wherein R 5 is halo, or preferably methyl, ethyl, isopropyl, tert-butyl, fluoro, chloro, or bromo.
- R 5 is halo, or preferably methyl, ethyl, isopropyl, tert-butyl, fluoro, chloro, or bromo.
- Embodiments of the invention are compounds of formula (I) or (II) or any of the subgroups of compounds of formula (1) wherein R 6 is C lH salkoxy or di-Ci-6 alkylamino; preferably R 6 is methoxy or dimethylamino; more preferably R 6 is methoxy.
- building block Pl further contains a Pl' tail.
- the carbonyl group marked with an asterisk in. compound ( ⁇ -c) below may be part of either building block P2 or of building block P3.
- building block P2 of the compounds of formula (I) wherein X is C incorporates the carbonyl group attached to the position V .
- the linking of building blocks Pl with P2, P2 with P3, and Pl with Pl' involves forming an amide bond.
- the linking of blocks Pl and P3 involves double bond formation.
- the linking of building blocks Pl, P2 and P3 to prepare compounds (I-i) or (I-j) can be done in any given sequence.
- One of the steps involves a cyclization whereby the macrocycle is formed.
- compounds (I-i) which are compounds of formula (I) or (II) wherein carbon atoms C7 and C8 are linked by a double bond
- compounds (I-j) which are compounds of formula (I) or (II) wherein carbon atoms C7 and C8 are linked by a single bond.
- the compounds of formula (I-j) can be prepared from the corresponding compounds of formula (I-i) by reducing the double bond in the macrocycle.
- the amide bond formation between blocks P2 and P3 may be accomplished at two different positions of the urea fragment.
- a first amide bond encompasses the nitrogen of the pyrrolidine ring and the adjacent carbonyl (marked with an asterisk).
- An alternative second amide bond formation involves the reaction of the asterisked carbonyl with a -NHR 3 group. Both amide bond formations between building blocks P2 and P3 are feasible.
- the synthesis procedures described hereinafter are meant to be applicable for as well the racemates, stereochemically pure intermediates or end products, or any stereoisomeric mixtures. The racemates or stereochemical mixtures may be separated into stereoisomeric forms at any stage of the synthesis procedures.
- the intermediates and end products have the stereochemistry specified above in the compounds of formula (I-a.) and (I-b).
- R 9 is Het 1 .
- compounds (I-i) are prepared by first forming the amide bonds and 5 subsequent forming the double bond linkage between P3 and Pl with concomitant cyclization to the macrocycle.
- compounds (I) or (II) wherein the bond between C 7 and C8 is a double bond which are compounds of formula (I-i), as defined above, may be prepared as outlined in the following reaction scheme:
- Formation of the macrocycle can be carried out via an olefin, metathesis reaction in the presence of a suitable metal catalyst such as e.g. the Ru-based catalyst reported by Miller, S.J., BlackwelL 11. E., Grubbs, RH. J. Am. Chem. Soc. 118, (1996), 9606-9614; Kingsbury, J. S., Harrity, J. P. A., Bonitatebus, P. ⁇ ., Hoveyda, A. H., J. Am. Chem. Soc. 121, (1999), 791-799; and Huang et al, J. Am. Chem. Soc. 121, (1999), 26742678; for example a Hoveyda-Gmbbs catalyst.
- a suitable metal catalyst such as e.g. the Ru-based catalyst reported by Miller, S.J., BlackwelL 11. E., Grubbs, RH. J. Am. Chem. Soc. 118, (1996), 9606
- Air-stable ruthenium catalysts such as bis(tricyclohexylphosphine)-3- phenyl-lH-inden-1-ylidene ruthenium chloride (Neolyst Ml ® ) or bis(tricyclohexylphosphine)-[(phenylthio)methyleneruthenium (IV) dichloride can be used.
- Other catalysts that can be used are Grubbs first and second generation catalysts, i.e.
- Hoveyda-Grubbs first and second generation catalysts which are dichloro(o-isopropoxyphenylmethylene)(tricyclohexylphosphine) ⁇ rathenium(II) and l,3-bis-(2,4,6-trimethylphenyl)-2- iinidazolidiiiylidene)dicl ⁇ loiO-(o-isopropoxyphenylmethylene)ruthenium respectively.
- catalysts containing other transition metals such as Mo can be used for this reaction.
- the metathesis reactions may be conducted in a suitable solvent such as for example ethers, e.g. THF 7 dioxane; halogenated hydrocarbons, e.g.
- dichoromethane CHCIs, 1,2-dichloroethane and the like, hydrocarbons, e.g. toluene.
- the metathesis reaction is conducted in toluene. These reactions are conducted at increased temperatures under nitrogen atmosphere.
- Compounds of formula (I) or (II) wherein the link between C7 and C8 in the macrocycle is a single bond can be prepared from the compounds of formula (I-i) by a reduction of the C7-C8 double bond in the compounds of formula (I-i). This reduction may be conducted by catalytic hydro genation with hydrogen in the presence of a noble metal catalyst such as, for example, Pt, Pd, Rh, Ru or Raney nickel. Of interest is Rh on alumina.
- the hydrogenation reaction preferably is conducted in a solvent such as, e.g. an alcohol such as methanol, ethanol, or an ether such as THF, or mixtures thereof. Water can also be added to these solvents or solvent mixtures
- the R 1 group can be connected to the Pl building block at any stage of the synthesis, i.e. before or after the cyclization, or before or after the cyclization and reduction as descibed herein above.
- the compounds of formula (I) or (II) wherein R 1 represents — NHSOsR 1 , said compounds being represented by formula (I-lol), can be prepared by linking the R 1 group to Pl by forming an amide bond between both moieties.
- - NHSO ⁇ R f groups are introduced in the last step of the synthesis of the compounds (I) or (II) as outlined in the following reaction schemes wherein G represents a group:
- Intermediate (2a) can be coupled with the amine (2b) by an amide forming reaction such as any of the procedures for the formation of an amide bond described hereinafter.
- (2a) may be treated with a coupling agent, for example N,N'-carbonyl-diimidazole (CDI), EEDQ, HDQ 7 EDCI or benzotriazol-1-yl-oxy-tris-pyrrolidino-phosphonium hexafluorophosphate (commercially available as PyBOP®), or O-(7-azabenzotriazoI-l-yl)-
- HATU W'-tetramethyluronium hexafluorophosphate
- a solvent such as an ether, e.g. THF, or a halogenated hydrocarbon, e.g. dichloromethane, chloroform, dichlo roe thane, and reacted with the desired sulfamate (2b), preferably after reacting (2a) with the coupling agent.
- the reactions of (2a) with (2b) preferably are conducted in.
- Intermediate (2a) can also be converted into an activated form, e.g. an activated form of general formula G- CO-Z, wherein 2 represents halo, or the rest of an active ester, e.g. 2 is an aryloxy group such as phenoxy, p.nitrophenoxy, pentafluorophenoxy, trichlorophenoxy, pentachlorophenoxy and the like; or Z can be the rest of a mixed anhydride.
- a base for example a trialkylamine such as trie thy lamine or diisopropylethylamine, or l,8-diazabicycle[5.4.0]undec-7-ene (DBU).
- DBU l,8-diazabicycle[5.4.0]undec-7-ene
- G-CO-Z is an acid chloride (G-CO-Cl) or a mixed acid anhydride (G-CO-O-CO-R or G-CO-O-CO-OR 7 R in the latter being e.g. C- ⁇ alkyl, such as methyl, ethyl, propyl, i. propyl, butyl, t. butyl, i.butyl, or benzyl).
- G-CO-Z is an acid chloride (G-CO-Cl) or a mixed acid anhydride (G-CO-O-CO-R or G-CO-O-CO-OR 7 R in the latter being e.g. C- ⁇ alkyl, such as methyl, ethyl, propyl, i. propyl, butyl, t. butyl, i.butyl, or benzyl).
- the activated form G-CO-Z is reacted with the sulfamate (2b).
- the intermediates (2a-l) can be isolated from the reaction mixture, using conventional methodology, and the isolated intermediate (2a-l) is then reacted with (2b), or the reaction mixture containing (2a-l) can be reacted further with (2b) without isolation of (2a ⁇ l).
- the reaction mixture containing (2a-l) may be washed with water or with slightly basic water in order to remove all water- soluble side products.
- the thus obtained washed solution may then be reacted with (2b) without additional purification steps.
- the isolation of intermediates (2a-l) on the other hand may provide certain advantages in that the isolated product, after optional further purification, may be reacted with (2b), giving rise to less side products and an easier work-up of the reaction.
- Intermediate (2a) can be coupled with the alcohol (2c) by an ester forming reaction.
- (2a) and (2c) are reacted together with removal of water either physically, e.g. by azeotropical water removal, or chemically by using a dehydrating agent.
- Intermediate (2a) can also be converted into an activated form G-CO-Z, such as the activated forms mentioned above, and subsequently reacted with the alcohol (2c).
- the ester forming reactions preferably are conducted in the presence of a base such as an alkali metal carbonate or hydrogen carbonate, e g.
- Solvents that can be used in the ester forming reactions comprise ethers such as THF; halogenated hydrocarbons such as dichoromethane, CH2CI2; hydrocarbons such as toluene; polar aprotic solvents such as DMF, DMSO, DMA; and the like solvents.
- the compounds of formula (I) or (II) wherein R 3 is hydrogen, said compounds being represented by (1-1), can also be prepared by removal of a protecting group PG, from a corresponding nitrogen-protected intermediate (3a), as in the following reaction scheme.
- the protecting group PG in particular is any of the nitrogen protecting groups mentioned hereinafter and can be removed using procedures also mentioned hereinafter:
- the starting materials (3a) in the above reaction can be prepared following the procedures for the preparation of compounds of formula (I) or (11), but using intermediates wherein the group R 3 is PG.
- Y in (4b) represents hydroxy or a leaving group LG such as a halide, e.g. bromide orchloride, or an arylsulfonyl group, e.g. mesylate, triflate or tosvlate and the like.
- the reaction of (4a) -with (4b) is an o-arylation reaction and Y represents a leaving group.
- This reaction can be conducted following the procedures described by E. M. Smith et al. ⁇ J. Med. Chem. (1988), 31, 875-885). In particular, this reaction is conducted in the presence of a base, preferably a strong base, in a reaction-inert solvent, e.g. one of the solvents mentioned for the formation of an amide bond.
- starting material (4a) is reacted with (4b) in the presence of a base which is strong enough to detract a hydrogen from the hydroxy group, for example an alkali of alkaline metal hydride such as LiH or sodium hydride, or alkali metal alkoxide such as sodium or potassium methoxide or ethoxide, potassium ferf-butoxide, in a reaction inert solvent like a dipolar aprotic solvent, e.g. DMA, DMF and the like.
- the resulting alcoholate is reacted with the arylating agent (4b), wherein Y is a suitable leaving group as mentioned above.
- the conversion of (4a) to (I) or (II) using this type of O-arylation reaction does not change the stereochemical configuration at the carbon bearing the hydroxy group.
- reaction of (4a) with (4b) can also be conducted via a Mitsunobu reaction (Mitsunobu, 1981, Synthesis, January, 1-28; Rano et al, Tetrahedron Let, 1995, 36, 22, 3779-3792; Krchnak et al., Tetrahedron Lett, 1995, 36, 5, 6193-6196; Richter et at, Tetrahedron Lett., 1994, 35, 27, 4705-4706).
- This reaction comprises treatment of intermediate (4a) with (4b) wherein Y is hydroxyl, in the presence of triphenylphosphine and an activating agent such as a dialkyl azocarboxylate, e.g.
- Yet another alternative synthetic methodology is the formation of an amide bond between building blocks P2 and P3, followed by the coupling of building block Pl to the P3 moiety in P3-P2, and a last amide bond formation between Pl and P2 in P1-P3-P2 with concomitant ring closure.
- Building blocks Pl and P3 can be linked to a P1-P3 sequence. If desired, the double bond linking Pl and P3 may be reduced.
- the thus formed Pl -P3 sequence either reduced or not, can be coupled to building block P2 and the thus forming sequence P1-P3-P2 subsequently cyclized, by forming an amide bond.
- Building blocks Pl and P3 in any of the previous approaches can be linked via double bond formation, e.g. by the olefin metathesis reaction described hereinafter, or a Wittig type reaction. If desired, the thus formed double bond can be reduced, similarly as described above for the conversion of (I-i) to (I-j). The double bond can also be reduced at a later stage, i.e. after addition of a third building block, or after formation of the macrocycle. Building blocks P2 and Pl are linked by amide bond formation and P3 and P2 are linked by carbamate or ester formation.
- the tail Pl' can be bonded to the Pl building block at any stage of the synthesis of the compounds of formula (I), for example before or after coupling the building blocks P2 and Pl; before or after coupling the P3 building block to Pl; or before or after ring closure.
- the individual building blocks can first be prepared and subsequently coupled together or alternatively, precursors of the building blocks can be coupled together and modified at a later stage to the desired molecular composition.
- the functionalities in each of the building blocks may be protected to avoid side reactions.
- amide bonds can be carried out using standard procedures such as those used for coupling amino acids in peptide synthesis.
- the latter involves the dehydrative coupling of a carboxyl group of one reactant with an amino group of the other reactant to form a linking amide bond.
- the amide bond formation may be performed by reacting the starting materials in the presence of a coupling agent or by converting the carboxyl functionality into an active form such as an active ester, mixed anhydride or a carboxyl acid chloride or bromide.
- a coupling agent or by converting the carboxyl functionality into an active form such as an active ester, mixed anhydride or a carboxyl acid chloride or bromide.
- Examples of coupling reactions with amide bond formation include the azide method, mixed carbonic-carboxylic acid anhydride (isobutyl chloroformate) method, the carbodiimide (dicyclohexylcarbodiimide, diisopropylcarbodiimide, or water-soluble carbodiimide such as N-ethylN'- [(3-dimethylammo)propyl]carbodiimide) method, the active ester method (e.g. p-nitrophenyl, p-chloro phenyl, trichlorophenyl, pentachlorophenyl, pentafluorophenyl, N-hydroxysuccinic imido and the like esters), the
- Woodward reagent K-method the 1,1-carbonyldiimidazole (CDI or N,N'- carbonyldiimidazole) method, the phosphorus reagents or oxidation- reduction methods. Some of these methods can be enhanced by adding suitable catalysts, e.g. in the carbodiimide method by adding 1- hydroxybenzotriazole, DBU (l,8-diazabicyclo[5.4.0]undec-7-ene), or 4-DMAP.
- CDI 1,1-carbonyldiimidazole
- N,N'- carbonyldiimidazole the phosphorus reagents or oxidation- reduction methods.
- suitable catalysts e.g. in the carbodiimide method by adding 1- hydroxybenzotriazole, DBU (l,8-diazabicyclo[5.4.0]undec-7-ene), or 4-DMAP.
- Further coupling agents are (benzotriazol-l-yloxy)tris-(dimethylamino) phosphonium hexafluorophosphate, either by itself or in the presence of 1- hydroxy-benzotriazole or 4-DMAP; or 2-(lH-benzotriazol-l-yl)-N / N,N'N'- tetramethyluroniurn tetrafluoroborate, or 0-(7-azabenzotriazol-l-yl)- hexafluorophosphate.
- These coupling reactions can be performed in either solution (liquid phase) or solid phase.
- a preferred amide bond formation is performed employing N- ethyloxycarbonyI-2-ethyloxy-l,2- dihydroquinoline (EEDQ) or N-isobutyloxy- carbonyl-2-isobutyloxy-l,2-dihydroquinoIine (IIDQ).
- EEDQ N- ethyloxycarbonyI-2-ethyloxy-l,2- dihydroquinoline
- IIDQ N-isobutyloxy- carbonyl-2-isobutyloxy-l,2-dihydroquinoIine
- the coupling reactions preferably are conducted in an inert solvent, such as halogenated hydrocarbons, e.g. dichloromethane, chloroform, dipolar aprotic solvents such as acetonitrile, dimethylformamide, dime thy lace tamide, DMSO, IIMPT, ethers such as tetrahydrofuran (THF).
- an inert solvent such as halogenated hydrocarbons, e.g. dichloromethane, chloroform, dipolar aprotic solvents such as acetonitrile, dimethylformamide, dime thy lace tamide, DMSO, IIMPT, ethers such as tetrahydrofuran (THF).
- halogenated hydrocarbons e.g. dichloromethane, chloroform
- dipolar aprotic solvents such as acetonitrile, dimethylformamide, dime thy lace tamide, DMSO, IIMPT
- reaction temperature may range between 0 0 C and 50 0 C and the reaction time may range between 15 min and 24 h.
- Carboxyl groups can be protected as an ester that can be cleaved off to give the carboxylic acid.
- Protecting groups that can be used include 1) alkyl esters such as methyl, trimethylsilyl and tertbutyl; 2) arylalkyl esters such as benzyl and substituted benzyl; or 3) esters that can. be cleaved by a mild base or mild reductive means such as trichloroethyl and phenacyl esters.
- Amino groups can be protected by a variety of N-protecting groups, such as:
- acyl groups such as formyl, trifluoroacetyl, phthalyl, and p- toluenesulfonyl;
- aromatic carbamate groups such as benzyloxy car bony 1 (Cbz or Z) and substituted benzyloxy car bony Is, and 9-fluorenylmethyloxycarbonyl (Fmoc);
- aliphatic carbamate groups such as tert-butyloxycarbonyl (Boc), ethoxycarbonyl, diisopropylmethoxy-carbonyl, and allyloxycarbonyl;
- cyclic alkyl carbamate groups such as cyclopentyloxycarbonyl and adamantyloxycarbonyl;
- alkyl groups such as triphenylmethyl, benzyl or substituted benzyl such as 4-methoxybenzyl;
- trialkylsilyl such as trimethylsilyl or t.Bu diinethylsilyl
- thiol containing groups such as phenylthiocarbonyl and dithiasuccinoyl.
- interesting amino protecting groups are Boc and Fmoc.
- the amino protecting group is cleaved off prior to the next coupling step. Removal of N-protecting groups can be done following art- known procedures.
- Boc group the methods of choice are trifluoroacetic acid, neat or in dichloromethane, or Ha in dioxane or in ethyl acetate.
- the resulting ammonium salt is then neutralized either prior to the coupling or in situ with basic solutions such as aqueous buffers, or tertiary amines in dichloromethane or acetonitrile or dimethylformamide.
- the reagents of choice are piperidine or substituted piperidine in dimethylformamide, but any secondary amine can be used.
- the deprotection is carried out at a temperature between 0 0 C and room temperature, usually around 15-25°C, or 20-22° 1 C.
- hydroxy 1 groups may be protected as benzyl or substituted benzyl ethers, e.g. 4-methoxybenzyl ether, benzoyl or substituted benzoyl esters, e.g. 4-nitrobenzoyl ester, or with trialkylsilyl goups (e.g. trimethylsilyl or terf-butyldimethyisilyl).
- Further amino groups may be protected by protecting groups that can be cleaved off selectively.
- Boc when used as the a-amino protecting group, the following side chain protecting groups are suitable: p- toluenesulfonyl (tosyl) moieties can be used to protect further amino groups; benzyl (Bn) ethers can be used to protect hydroxy groups; and benzyl esters caii be used to protect further carboxyl groups.
- Fmoc when Fmoc is chosen for the a-amino protection, usually tert-butyl based protecting groups are acceptable.
- Boc can be used for further amino groups; fcrfbutyl ethers for hydroxyl groups; and tert-butyl esters for further carboxyl groups.
- any of the protecting groups may be removed at any stage of the synthesis procedure but preferably, the protecting groups of any of the functionalities not involved in the reaction steps are removed after completion of the build-up of the macrocycle. Removal of the protecting groups can be done in whatever manner is dictated by the choice of protecting groups, which manners are well known to those skilled in the art.
- intermediates of formula (Ia) wherein X is N may be prepared starting from intermediates (5a) which are reacted with an alkenamine (5b) in the presence of a carbonyl introducing agent as outlined in the following reaction scheme.
- Carbonyl (CO) introducing agents include phosgene, or phosgene derivatives such as carbonyl diimidazole (CDI), and the like.
- phosgene or phosgene derivatives such as carbonyl diimidazole (CDI), and the like.
- 5a) is reacted with the CO introducing agent in the presence of a suitable base and a solvent which can be the bases and solvents used in the amide forming reactions as described above.
- the base is a hydrogencarbonate, e.g. NaHCOs, or a tertiary amine such as triethylamine and the like
- the solvent is an ether or halogenated hydrocarbon, e.g. THF, CH2CI2, CHCI3, arid the like.
- the intermediates (Ia-I) can alternatively be prepared as follows:
- PG 1 is an. O-protecting group, which can be any of the groups mentioned herein and in particular is a benzoyl or substituted benzoyl group such as 4-nitrobenzoyl. In the latter instance this group can be removed by reaction with an alkali metal hydroxide (LiOH, NaOH, KOH), in particular where PG 1 is 4-nitrobenzoyl, with LiOH, in an aqueous medium comprising ⁇ water and a water-soluble organic solvent such as an alkanol (methanol, ethanol) and THF.
- an alkali metal hydroxide LiOH, NaOH, KOH
- Intermediates (6a) are reacted with (b) in the presence of a carbonyl introducing agent, similar as described above, and this reaction yields intermediates (6c). These are deprotected, in particular using the reaction conditions mentioned above.
- the resulting alcohol (6d) is reacted with intermediates (4b) as described above for the reaction of (4a) with (4b) and this reaction results in intermediates (Ia-I).
- the intermediates of formula (Ia) wherein X is C, said intermediates being represented by formula (la-2), may be prepared by an amide forming reaction starting from intermediates (7a) "which are reacted with an amine (b) as shown in the following reaction scheme, using reaction conditions for preparing amides such as those described above.
- the intermediates (Ia-I) can alternatively be prepared as follows:
- PG 1 is an O-protecting group as described above.
- the same reaction conditions as described above may be used: amide formation as described above, removal of PG 1 as in the description of the protecting groups and introduction of R 9 as in the reactions of (4a) with the reagents (4b).
- the intermediates of formula (2a) may be prepared by first cyclizing the open amide (9a) to a macrocycle ester (9b), which in turn is converted to
- PG 2 is a carboxyl protecting group, e.g. one of the carboxyl protecting groups mentioned above, in particular a Q -4 alkyl or benzyl ester, e.g. a methyl, ethyl or ferf-butyl ester.
- the reaction of (9a) to (9b) is a metathesis reaction and is conducted as described above.
- the group PG 2 is removed following procedures also described above.
- PG 1 is a Q .4 alkyl ester, it is removed by alkaline hydrolysis, e.g. with NaOH or preferably LiOH, in an aqueous solvent, e.g. a Ci ⁇ alkanol/ water mixture.
- a benzyl group can be removed by catalytic hydrogenation.
- intermediates (2a) can be prepared as follows:
- the PG 1 group is selected such that it is selectively cleavable towards PG 2 .
- PG 2 may be e.g. methyl or ethyl esters, which can be removed by treatment with an alkali metal hydroxide in an aqueous medium, in which case PG 1 e.g. is ferf-butyl or benzyl.
- PG 2 may be fcrf-butyl esters removable under weakly acidic conditions or PG 1 may be benzyl esters removable with strong acid or by catalytic hydrogenation, in the latter two cases PG 1 e.g. is a benzoic ester such as a 4-nitrobenzoic ester.
- intermediates (10a) are cyclized to the macrocyclic esters (10b), the latter are deprotected by removal of the PG 1 group to (10c), which are reacted with intermediates (4b), followed by removal of carboxyl protecting group PG 2 .
- the cyclization, deprotection of PG 1 and PG 2 and the coupling with (4b) are as described above.
- the R 1 groups can be introduced at any stage of the synthesis, either as the last step as described above, or earlier, before the macrocycle formation.
- the group R J being -NHSCbR f (which are as specified above) are introduced:
- PG 2 is as defined above and L 1 is a P3 group
- L 1 may also be a nitrogen protecting group (PG, as defined above) and where X is C, L 1 may also be a group -COOPG 2c ⁇ wherein the group PG 2tl is a carboxyl protecting group similar as PG 2 , but wherein PG 2a is selectively cleavable towards PG 2 .
- PG 2a is fcrf-butyl and PG 2 is methyl or ethyl.
- intermediates (lie) and (lid) wherein L 1 represents a group (b) correspond to the intermediates (Ia) and may be processed further as specified above.
- the Pl and P2 building blocks are linked using an amide forming reaction following the procedures described above.
- the Pl building block may have a carboxyl protecting group PG 2 (as in (12b)) or may already be linked to Pl' group (as in (12c)).
- L 2 is a N-protecting group (PG), or a group (b), as specified above.
- L 3 is hydroxy, -OPG 1 or a group -O-R 9 as specified above. Where in any of the following reaction schemes L 3 is hydroxy, prior to each reaction step, it may be protected as a group -OPG 1 and, if desired, subsequently deprotected back to a free hydroxy function. Similarly as described above, the hydroxy function may be converted to a group -O-R 9 .
- a cyclopropyl amino acid (12b) or (12c) is coupled to the acid function of the P2 building block (12a) with the formation of an amide linkage, following the procedures described above.
- Intermediates (12d) or (12e) are obtained.
- L 2 is a group (b)
- the resulting products are P3-P2-P1 sequences encompassing some of the intermediates (lie) or (lid) in the previous reaction scheme.
- L 2 is a N-protecting group, it can be removed yielding intermediates (5a) or (6a),
- PG in this reaction is a BOC group and PG 2 is methyl or ethyl.
- L 3 is hydroxy
- the starting material (12a) is Boc-L-hydroxy proline.
- PG is BOC
- PG 2 is methyl or ethyl
- U is -O-R 9 .
- L 2 is a group (b) and these reactions involve coupling Pl to P2-P3, which results in the intermediates (Ia-I) or (Ia) mentioned above.
- L 2 is a N-protecting group PG, which is as specified above, and the coupling reaction results in intermediates (12d-l) or (12e-l), from which the group PG can be removed, using reaction conditions mentioned above, obtaining intermediates (12-f) or respectively (12g), which encompass intermediates (5a) and (6a) as specified above:
- the group L 3 in the above schemes represents a group -O-PG 3 which can be introduced on a starting material (12a) wherein L 3 is hydroxy.
- PG 1 is chosen such that it is selectively deavable towards group L 2 being PG.
- P2 building blocks wherein X is C, which are cyclopentane or cyclopentene derivatives can be linked to PI building blocks as outlined in the following scheme wherein R ] , R 2 , L 3 are as specified above and PG 2 and PG 2a are carboxyl protecting groups.
- PG 2a typically is chosen such that it is selectively cleavable towards group PG 2 . Removal of the PG 2a group in (13c) yields intermediates (7a) or (8a), which can be reacted with (5b) as described above.
- Bicyclic acid (14a) is reacted with (12b) or (12c) similar as described above to (14b) and (14c) respectively, wherein the lactone is opened giving intermediates (14c) and (14e).
- the lactones can be opened using ester hydrolysis procedures, for example using the reaction conditions described above for the alkaline removal of a PG 1 group in (9b), in particular using basic conditions such as an alkali metal hydroxide, e.g. NaOH, KOH, in particular LiOH.
- P3 and P2-P1 building blocks are linked using a carbamate forming reaction following the procedures described above for the coupling of (5a) with (5b).
- a general procedure for coupling P2 blocks having a pyrrolidine moiety is represented in the following reaction scheme wherein. L 3 is as specified above and L 4 is a group -O-PG 2 , a group
- L 4 in (15a) is a group -OPG 2
- the PG 2 group may be removed and the resulting acid coupled with cyclopropyl amino acids (12a) or (12b), yielding intermediates (12d) or (12e) wherein L 2 is a radical (d) or (e).
- L 3 and L 4 taken together may form a lactone bridge as in (14a), and the coupling of a P3 block with a P2 block is as follows:
- Bicyclic lactone (14a) is reacted with (5b) in an amide forming reaction to amide (16c) in which the lactone bridge is opened to (16d).
- the reaction conditions for the amide forming and lactone opening reactions are as described above or hereinafter.
- Intermediate (16d) in turn can be coupled to a Pl group as described above.
- the building blocks Pl, Pl', P2 and P3 used in the preparation of the compounds of formula (I) can be prepared starting from art-known intermediates. A number of such syntheses are described hereafter in more detail.
- the individual building blocks can first be prepared and subsequently coupled together or alternatively, precursors of the building blocks can be coupled together and modified at a later stage to the desired molecular composition.
- the functionalities in each of the building blocks may be protected to avoid side reactions.
- the P2 building blocks contain either a pyrrolidine, a cyclopentane, or a cyclopentene moiety substituted with a group -O-R 4 ,
- P2 building blocks containing a pyrrolidine moiety can be derived from commercially available hydroxyproline.
- the bicyclic acid (17b) can be prepared, for example, from 3,4- bis(methoxycarbonyl)- cyclopentanone (17a), as described by Rosenquist et al. in Acta Chem. Scand. 46 (1992) 1127-1129.
- a first step in this procedure involves the reduction of the keto group with a reducing agent like sodium borohy dride in a solvent such as methanol, followed by hydrolysis of the esters and finally ring closure to the bicyclic lactone (17b) using lactone forming procedures, in particular by using acetic anhydride in the presence of a weak base such as pyridine.
- the carboxylic acid functionality in (17b) can then be protected by introducing an appropriate carboxyl protecting group, such as a group PG 2 , which is as specified above, thus providing bicyclic ester (17c).
- the group PG 2 in particular is acid-labile such as a ferf-butyl group and is introduced e.g. by treatment with isobutene in the presence of a Lewis acid or with di-ferf-butyl dicarbonate in the presence of a base such as a tertiary amine like dimethylaminopyridine or triethylamine in a solvent like dichloromethane.
- the free acid in (17 d) may also be protected, preferably with an acid protecting group PG 2d that is selectively cleavable towards PG 2 , and the hydroxy function may be converted to a group -OPG 1 or to a group -O-R 9 .
- the products obtained upon removal of the group PG 2 are intermediates (17g) and (17i) which correspond to intermediates (13a) or (16a) specified above.
- Intermediates with specific stereochemistry may be prepared by resolving the intermediates in the above reaction sequence.
- (17b) may be resolved following art-known procedures, e.g. by salt form action with an optically active base or by chiral chromatography, and the resulting stereoisomers may be processed further as described above.
- the OH and COOH groups in (17d) are in cis position.
- Trans analogs can be prepared by inverting the stereochemistry at the carbon bearing the OH function by using specific reagents in the reactions introducing OPG 1 or O-R 9 that invert the stereochemistry, such as, e.g. by applying a Mitsunobu reaction.
- the intermediates (17d) are coupled to Pl blocks (12b) or (12c), which coupling reactions correspond to the coupling of (13a) or (16a) with the same Pl blocks, using the same conditions.
- Subsequent introduction of a -O-R 9 substituent as described above followed by removal of the acid protection group PG 2 yields intermediates (8a-l), which are a subclass of the intermediates (7a), or part of the intermediates (16a).
- the reaction products of the PG 2 removal can be further coupled to a P3 building block
- PG 2 in (17d) is tert-hutyl which can be removed under acidic conditions, e.g. with trifluoroacetic acid.
- An unsaturated P2 building block i.e. a cyclopentene ring, may be prepared as illustrated in the scheme below.
- An unsaturated P2 building block wherein R 2 can also be other than hydrogen, may be prepared as shown in the scheme below.
- the latter can then be condensed with the alkenyl ester (2Oe), obtained from (2Od) by an ester forming reaction.
- the ester in (2Oe) preferably is a fe?'f-butyl ester which can be prepared from the corresponding commercially available acid (2Od), e.g. by treatment with di- f ⁇ rf-butyl dicarbonate in the presence of a base like dimethylaminopyridine.
- the double bond in intermediate (2Oi) can be reduced, for example by catalytic hydrogenation using a catalyst like palladium on carbon, yielding the corresponding cyclopentane compound.
- the fcrf -butyl ester may be removed to the corresponding acid, which subsequently is coupled to a Pl building block.
- the -R 9 group can be introduced on the pyrrolidine, cyclopentane or cyclopentene rings at any convenient stage of the synthesis of the compounds according to the present invention.
- One approach is to first introduce the -R 9 group to the said rings and subsequently add the other desired building blocks, i.e. Pl (optionally with the Pl' tail) and P3, followed by the macrocycle formation.
- Another approach is to couple the building blocks P2, bearing no - O-R 9 substituent, with each Pl and P3, and to add the -R 9 group either before or after the macrocycle formation.
- the P2 moieties have a hydroxy group, which may be protected by a hydroxy protecting group PG 1 .
- R 9 groups can be introduced on building blocks P2 by reacting hydroxy substituted intemiediates (21a) or (21b) with intermediates (4b) similar as described above for the synthesis of (I) starting from (4a).
- L 2 is as specified above and L 5 and L5 a independently from one another, represent hydroxy, a carboxyl protecting group -OPG 2 or -PG 2a , or L 5 may also represent a Pl group such as a group (d) or (e) as specified above, or L 5a may also represent a P3 group such as a group (b) as specified above
- the groups PG 2 and PG 2a are as specified above.
- L 5 and L 5a are PG 2 or PG 2 ⁇ they are chosen such that each group is selectively cleavable towards the other.
- one of L 5 and L 5a may be a methyl or ethyl group and the other a benzyl or tert-butyl group.
- L 2 is PG and L 3 is -OPG 2
- L 5a is OPG 2 and L 5 is -OPG 2 and the PG 2 groups are removed as described above.
- the quinoline substituent when handling hydroxy substituted cyclopentane analogues, can be introduced via a similar Mitsunobu reaction by reacting the hydroxy group of compound (2a') with the desired alcohol (3b) in the presence of tripheiiylphosphine and an activating agent like diethyl azodicarboxylate (DEAD), diisopropyl azodicar boxy late (DIAD) or the like.
- DEAD diethyl azodicarboxylate
- DIAD diisopropyl azodicar boxy late
- the group L 2 is Boc, L 5 is hydroxy and the starting material (21a) is commercially available BOC-hydroxy proline, or any other stereo isomeric form thereof, e.g. Boc-L-hydroxyproIine, in particular the trans isomer of the latter.
- L 5 in (21b) is a carboxyl- protecting group, it may be removed following procedures described above to (21c).
- PG in (2Ib-I) is Boc and PG 2 is a lower alkyl ester, in particular a methyl or ethyl ester. Hydrolysis of the latter ester to the acid can be done by standard procedures, e.g.
- hydroxy substituted cyclopentane or cyclopentene analogs (2Id) are converted to (2Ie), which, where L 5 and L 5a are -OPG 2 or -OPG 2a , may be converted to the corresponding acids (2If) by removal of the group PG 2 . Removal of PG 2a in (2Ie-I) leads to similar intermediates.
- the intermediates Y-R 9 (4b) can be prepared following art-known methods using known starting materials. A number of synthesis pathways for such intermediates will be described hereafter in somewhat more detail. For example the preparation of the above mentioned intermediate quinolines is shown below in the following scheme.
- the latter can be converted to (22f) wherein LG is a leaving group, e.g. by reaction of (22e) with a halogenating agent, for example phosphoryl chloride or the like, or with an arylsulfonyl chloride, e.g. with tosyl chloride.
- a halogenating agent for example phosphoryl chloride or the like
- an arylsulfonyl chloride e.g. with tosyl chloride.
- Quinoline derivative (22e) can be coupled in a Mitsunobu reaction to an alcohol as described above, or quinoline (22f) can be reacted with (Ia) in an O-arylation reaction as described above.
- carboxylic acids with the general structure (22c) can be used in the above synthesis. These acids are available either commercially or can be prepared via art-known procedures.
- Ethyl thiooxamate (23a) is reacted with the a-bromoketone (23b) to form the ethyl thiazolyl carboxylic acid ester (23c), which is hydrolyzed to the corresponding acid (22c-l).
- the ethyl ester in these intermediates may be replaced by other carboxyl protecting groups PG 2 , as defined above.
- R 4a is as defined above and in particular is Ci -4 alkyl, more in particular iso propyl.
- the a-bromoketone (23b) may be prepared from 3-methyl-butan-2-one (MIK) with a sililating agent (such as TMSCl) in the presence of a suitable base (in particular LiHMDS) and bromine.
- MIK 3-methyl-butan-2-one
- TMSCl sililating agent
- a suitable base in particular LiHMDS
- Thiourea (24c) with various substituents R 4a which in particular are O- ⁇ alkyl, can be formed by reaction of the appropriate amine (24a) with tert- butylisothiocyanate in the presence of a base like diisopropylethylamine in a solvent like dichlorome thane followed by removal of the tert-butyl group under acidic conditions. Subsequent condensation of thiourea derivative (24c) with 3-bromopyruvic acid provides the thiazole carboxylic acid (22c-2).
- the cyclopropane amino acid used in the preparation of the Pl fragment is commercially available or can be prepared using art-known procedures.
- amino-v iny 1-cy clop ropy 1 ethyl ester (12b) may be obtained according to the procedure described in WO 00/09543 or as illustrated in the following scheme, wherein PG 2 is a carboxyl protecting group as specified above:
- Pl building blocks for the preparation of compounds according to general formula (I) wherein R 1 is - NHSCbR f can be prepared by reacting amino acids (26a) with the appropriate amine under standard conditions for amide formation. Cyclopropyl amino acids (26a) are prepared by introducing a N- protecting group PG, and removal of PG 2 and the resulting amino acids (26a) are converted to the amides (12c-l), which are subgroups of the intermediates (12c), as outlined in the following reaction scheme, wherein PG is as specified above.
- reaction of (26a) with amine (2b) is an amide forming procedure and can be performed following the procedures described above.
- This reaction yields intermediates (26b) from which the amino protecting group is removed by standard methods such as those described above. This in turn results in the desired intermediate (12c-l).
- Starting materials (26a) may be prepared from the above-mentioned intermediates (12b) by first introducing a N-protecting group PG and subsequent removal of the group PG 2 .
- reaction of (26a) with (2b) is done by treatment of the amino acid with a coupling agent, for example O-(7-azabenzotriazol-l- yl )-N,N,N, 'N '-tetramemyluronium hex afluoro phosphate (HATU) in the presence of diisopropylethylamine, in a solvent such as dichloromethane or DMF followed by reaction with (2b) in the presence of a base such as 1,8- diazabicyclo[.4.0]undec-7-ene (DBU).
- a coupling agent for example O-(7-azabenzotriazol-l- yl )-N,N,N, 'N '-tetramemyluronium hex afluoro phosphate (HATU) in the presence of diisopropylethylamine, in a solvent such as dichloromethane or DMF
- a base such as 1,8
- N,N'- carbonyldiimidazole (CDI) or the like, in a solvent like THF in the presence of a base such as DBU can also be used in the coupling of (26a) with (2b).
- Another alternative procedure involves the amino acid (26a) being treated with (2b) in the presence of a base like d ⁇ sopropylethylamine followed by treatment with a coupling agent such as benzotriazole-1-yl-oxy-tris- pyrrolidinophosphonium hexafluorophosphate (commercially available as PyBOP®), to effect the introduction of the sulfamate group.
- a coupling agent such as benzotriazole-1-yl-oxy-tris- pyrrolidinophosphonium hexafluorophosphate (commercially available as PyBOP®), to effect the introduction of the sulfamate group.
- Intermediate (12c-l) in turn may be coupled to the appropriate proline, cyclopentane or cyclopentene derivatives as described above.
- the P3 building blocks are available commercially or can be prepared according to methodologies known to the skilled in the art. One of these methodologies is shown in the scheme below and uses monoacylated amines, such as a trifluoroacetamide or a Boc protected amine.
- R together with the CO group forms a N- protecting group, in particular R is ferf-butoxy or trifluoromethyl; R 3 and n are as defined above and LG is a leaving group, in particular halogen, e.g. chloro or bromo.
- the monoacylated amines (27a) are treated with a strong base such as sodium hydride and are subsequently reacted with a reagent LG-Cs-salkenyl (27b), in particular haloCs- ⁇ alkenyl, to form the corresponding protected amines (27c).
- a strong base such as sodium hydride
- LG-Cs-salkenyl (27b) in particular haloCs- ⁇ alkenyl
- the following scheme illustrates yet another method for preparing a P3 building block, namely a Gabriel synthesis of primary Cs-salkenylamines, which can be carried out by the treatment of a phthalimide (28a) with a base, such as NaOH or KOH, and with (27b), which is as specified above, followed by deprotection of the intermediate N-alkenyl imide with a reagent such as hydrazine monohydrate to generate a primary Cs-aalkenylamine (5b-l).
- n is as defined above.
- Pl 7 building blocks can be prepared according to methodologies known to the skilled in the art from commercially available starting materials via a two step process.
- chlorosulfonyl isocyanate (29a) is reduced with a suitable reagent to chlorosulfonyl amide (29b).
- the chlorosulfonyl amide (29b) can then undergo esterification with an appropriate alcohol R 1 OH (29c) in a suitable organic solvent such as NMP to form the corresponding sulfamate (2b), which can be readily isolated by crystallization or chromatography.
- the conversion of (29a) to (29b) is accomplished by treating (29a) with formic acid to afford reduction to chlorosulfonyl amide (29b), which is then subsequently treated with R f OH to afford sulfamate (2b).
- R'OH is an alcohol as defined above and in particular R f is Cs-scycloalkyl, more in particular cyclopropanol or 1-methyl-l -cyclopropanol which can be prepared according to methodologies known to the skilled in the art with reference to procedures and intermediates described by Krow, G.R., et al. Organic Reactions, 1993, 43; Denis or J.M. et. al. Synthesis, 1972, 10, 549 and Kulinkovich, O.G., et. al. Synthesis, 1991, 3, 234.
- the compounds of formula (I) or (II) may be converted to the corresponding N-oxide forms following art-known procedures for converting a trivalent nitrogen into its N-oxide form.
- Said N-oxidation reaction may generally be carried out by reacting the starting material of formula (I) or (II) with an appropriate organic or inorganic peroxide.
- Appropriate inorganic peroxides comprise, for example, hydrogen peroxide, alkali metal or earth alkaline metal peroxides, e.g. sodium peroxide, potassium peroxide
- appropriate organic peroxides may comprise peroxy acids such as, for example, benzenecarboperoxoic acid or halo substituted benzenecarboperoxoic acid, e.g.
- S-chlorobenzenecarboperoxoic acid peroxoalkanoic acids, e.g. peroxoacetic acid, alkylhydroperoxides, e.g. tert- butyl hydro-peroxide.
- Suitable solvents are, for example, water, lower alcohols, e.g. ethanol and the like, hydrocarbons, e.g. toluene, ketones, e.g. 2- butanone, halogenated hydrocarbons, e.g. dichloromethane, and mixtures of such solvents.
- Diastereomers may be separated by physical methods such as selective crystallization and chromatographic techniques, e.g., counter-current distribution, liquid chromatography and the like.
- the compounds of formula (I) or (II) may be obtained as racemic mixtures of enantiomers which can be separated from one another following art-known resolution procedures.
- the racemic compounds of formula (I) or (II), which are sufficiently basic or acidic may be converted into the corresponding diastereomeric salt forms by reaction with a suitable chiral acid, respectively chiral base. Said diastereomeric salt forms are subsequently separated, for example, by selective or fractional crystallization and the enantiomers are liberated therefrom, by alkali or acid.
- An alternative manner of separating the enantiomeric forms of the compounds of formula (I) or (II) involves liquid chromatography, in particular liquid chromatography using a chiral stationary phase.
- Said pure stereochemically isomeric forms may also be derived from the corresponding pure stereochemically isomeric forms of the appropriate starting materials, provided that the reaction occurs stereospecifically.
- said compound may be synthesized by stereospecific methods of preparation. These methods may advantageously employ enantiomerically pure starting materials,
- the present invention concerns a pharmaceutical composition
- a pharmaceutical composition comprising a therapeutically effective amount of a compound of formula (I) or (II) as specified herein, or a compound of any of the subgroups of compounds of formula (I) or (II) as specified herein, and a pharmaceutically acceptable carrier.
- a therapeutically effective amount in this context is an amount sufficient to prophy tactically act against, to stabilize or to reduce viral infection, and in particular HCV viral infection, in infected subjects or subjects being at risk of being infected.
- this invention relates to a process of preparing a pharmaceutical composition as specified herein, which comprises intimately mixing a pharmaceutically acceptable carrier with a therapeutically effective amount of a compound of formula (I) or (II), as specified herein, or of a compound of any of the subgroups of compounds of formula (I) or (II) as specified herein.
- compositions of the present invention may be formulated into various pharmaceutical forms for administration purposes.
- compositions there may be cited all compositions usually employed for systemically administering drugs.
- an effective amount of the particular compound, optionally in addition salt form or metal complex, as the active ingredient is combined in intimate admixture with a pharmaceutically acceptable carrier, which carrier may take a wide variety of forms depending on the fouli of preparation desired for administration.
- a pharmaceutically acceptable carrier which carrier may take a wide variety of forms depending on the fouli of preparation desired for administration.
- These pharmaceutical compositions are desirable in unitary dosage form suitable, particularly, for administration orally, rectally, percutaneously, or by parenteral injection.
- any of the usual pharmaceutical media may be employed such as, for example, water, glycols, oils, alcohols and the like in the case of oral liquid preparations such as suspensions, syrups, elixirs, emulsions and solutions; or solid carriers such as starches, sugars, kaolin, lubricants, binders, disintegrating agents and the like in the case of powders, pills, capsules, and tablets. Because of their ease in administration, tablets and capsules represent the most advantageous oral dosage unit forms, in which case solid pharmaceutical carriers are obviously employed.
- the carrier will usually comprise sterile water, at least in large part, though other ingredients, for example, to aid solubility, may be included.
- Injectable solutions may be prepared in which the carrier comprises saline solution, glucose solution or a mixture of saline and glucose solution.
- Injectable suspensions may also be prepared in which case appropriate liquid carriers, suspending agents and the like may be employed. Also included are solid form preparations which are intended to be converted, shortly before use, to liquid form preparations,
- the carrier optionally comprises a penetration enhancing agent and/or a. suitable wetting agent, optionally combined with suitable additives of any nature in minor proportions, which additives do not introduce a significant deleterious effect on the skin.
- the compounds of the present invention may also be administered via oral inhalation or insufflation by means of methods and formulations employed in the art for administration via this way.
- the compounds of the present invention may be administered to the lungs in the form of a solution, a suspension or a dry powder, a solution being preferred. Any system developed for the delivery of solutions, suspensions or dry powders via oral inhalation or insufflation are suitable for the administration of the present compounds.
- the present invention also provides a pharmaceutical composition adapted for administration by inhalation or insufflation through the mouth comprising a compound of formula (I) or (II) and a pharmaceutically acceptable carrier.
- a pharmaceutical composition adapted for administration by inhalation or insufflation through the mouth comprising a compound of formula (I) or (II) and a pharmaceutically acceptable carrier.
- the compounds of the present invention are administered via inhalation of a solution in nebulized or aerosolized doses.
- Unit dosage form refers to physically discrete units suitable as unitary dosages, each unit containing a predetermined quantity of active ingredient calculated to produce the desired therapeutic effect in association with the required pharmaceutical carrier.
- unit dosage forms are tablets (including scored or coated tablets), capsules, pills, suppositories, powder packets, wafers, injectable solutions or suspensions and the like, and segregated multiples thereof.
- Viral infections and their associated dise ases treatable using the compounds and methods of the present invention includethose infections brought on by HCV and other pathogenic flaviviruses such as Yellow fever, Dengue fever (types 1-4), St. Louis encephalitis, Japanese encephalitis, Murray valley encephalitis, West Nile virus and Kunjin virus.
- the diseases associated with HCV include progressive liver fibrosis, inflammation and necrosis leading to cirrhosis, end- stage liver disease, and HCC; and for the other pathogenic flaviviruses the diseases include yellow fever, dengue fever, hemorrhagic fever and encephalitis.
- a number of the compounds of this invention moreover are active against mutated strains of HCV. Additionally, many of the compounds of this invention show a favorable pharmacokinetic profile and have attractive properties in terms of bioavai ⁇ abilty, including an acceptable half- life, AUC ⁇ area under the curve) and peak values and lacking unfavorable phenomena such as insufficient quick onset and tissue retention.
- the compounds of formula (I) or (II) or any subgroup thereof, their prodrugs, N-oxides, addition salts, quaternary amines, metal complexes and stereochemically isomeric forms are useful in the treatment of individuals experiencing a viral infection, particularly a HCV infection, and for the prophylaxis of these infections.
- the compounds of the present invention may be useful in the treatment of warm-blooded animals infected with viruses, in particular flaviviruses such as HCV.
- the compounds of the present invention or any subgroup thereof may therefore be used as medicines.
- Said use as a medicine or method of treatment comprises the systemic administration to viral infected subjects or to subjects susceptible to viral infections of an amount effective to combat the conditions associated with the viral infection, in particular the HCV infection.
- the present invention also relates to the use of the present compounds or any subgroup thereof in the manufacture of a medicamentfor the treatment or the prevention of viral infections, particularly HCV infection.
- the present invention furthermore relates to a method of treating a warmblooded animal infected by a virus, or being at risk of infection by a virus, in particular by HCV, said method comprising the administration of an anti- virally effective amount of a compound of formula (I) or (II), as specified herein, or of a compound of any of the subgroups of compounds of formula (I) or (II), as specified herein.
- Combinations of one or more compounds of the present invention and one or more additional pharmaceutically active agent(s) may be used in the practice of the present invention to treat human beings having an HCV infection.
- Useful active therapeutic agents for treating an HCV infection include interferons, ribavirin or its analogs, HCV NS3 protease inhibitors, alpha-glucosidase 1 inhibitors, hepatoprotectants, nucleoside or nucleotide inhibitors of HCV NS5B polymerase, non-nucleoside inhibitors of HCV NS5B polymerase, HCV NS5A inhibitors, TLR-7 agonists, cyclophillin inhibitors, HCV IRES inhibitors, and pharmacokinetic enhancers.
- active therapeutic ingredients or agents for tr eating HCV include:
- interferons selected from the group consisting of pegylated rIFN-alpha 2b (PEG-Intron), pegylated rIFN-alpha 2a (Pegasys), rIFN-alpha 2b (Intron A), rIFN-alpha 2a (Roferon-A), interferon alpha (MOR-22, OPC-18, A ⁇ faferone, Alfanative, Multiferon, subalin), interferon alfacon-1 (Iniergen), interferon alpha-nl (Wellferon), interferon alpha-n3 (Alferon), interferon- beta (Avonex, DL-8234), interferon-omega (omega DUROS, Biomed 510), albinterferon alpha- 2b (Albuferon), IFN alpha-2b XL, BLX-883 (Locteron), DA-3021, glycosylated interferon alpha-2b (AVI-005), P
- HCV NS3 protease inhibitors selected from, the group consisting of boceprevir (SCH-503034, SCH-7), telaprevir (VX-950), TMC-435350, BI-1335, BI-1230, MK-7009, VBY-376, VX-500, BMS-790052, BMS-605339, PHX-1766, AS-101, YH-5258, YH5530, YH5531, ITMN-191, and mixtures thereof;
- alpha-glucosidase 1 inhibitors selected from, the group consisting of celgosivir (MX-3253), Miglitol, UT-231B, and mixtures thereof;
- hepatoprotectants selected from the group consisting of IDN-6556, ME 3738, LB-84451, silibilin, MitoQ, and mixtures thereof;
- nucleoside or nucleotide inhibitors of HCV NS5B polymerase selected from the group consisting of R1626, R7128 (R4048), IDX184, IDX-102, BCX-
- non-nucleoside inhibitors of HCV NS5B polymerase selected from the group consisting of PF-868554, VCH-759, VCH-916, JTK-652, MK-3281, VBY- 708, VCH-222, A848837, ANA- 598, GL60667, GL59728, A-63890, A-48773, A- 48547, BC-2329, VCH-796 (nesbuvir), GSK625433, BILN-1941, XTL-2125, GS- 9190, and mixtures thereof;
- HCV NS5A mhibitors selected from the group consisting of AZD-2836 (A-831), A-689, and mixtures thereof;
- TLR-7 agonists selected from the group consisting of ANA-975, SM- 360320, and mixtures thereof;
- cyclophillin inhibitors selected from the group consisting of DEBIO- 025, SCY-635, NIM811, and mixtures thereof;
- HCV IRES inhibitors selected from the group consisting of MCI-067,
- pharmacokinetic enhancers selected from the group consisting of BAS- 100, SPI-452, PF-4194477, TMC-41629, roxythromycin, and mixtures thereof;
- the present invention provides a combination pharmaceutical composition
- a combination pharmaceutical composition comprising; a) a compound of the present invention or a pharmaceutically acceptable salt thereof; and b) a second pharmaceutically active agent (or pharmaceutically acceptable salt thereof) effective to treat HCV.
- the present application provides a method for treating an HCV infection, wherein the method comprises the step of coadministering, to a human being in need thereof, a therapeutically effective amount of a compound of the present invention and one or more of the additional active agents described herein, that are effective to treat HCV.
- the amounts of a compound of the present invention and the one or more additional therapeutic agent ⁇ s are individually therapeutic, but it is within the scope of the invention for the amounts of the compound of the present invention (referred to as "the compound") and the one or more additional therapeutic agent(s) to be subtherapeutic by themselves, but the combination of the compound of the present invention and the one or more additional therapeutic agent(s) is therapeutic.
- Co-administration of the compound of the present invention with one or more other active agents generally refers to simultaneous or sequential administration of the compound and one or more other active agents, such that the compound and one or more other active agents are both present in the body of the patient.
- Simultaneous administration of the compound and one or more additional therapeutic agents can be achieved, for example, by mixing the compound and one or more additional therapeutic agents in a single dosage form, such as a tablet or injectable solution.
- simultaneous administration of the compound and one or more additional therapeutic agents can. be achieved by co-packaging, for example in a blister pack, the compound and at least one other therapeutic agent, so that a patient can remove and consume individual doses of the compound and the other therapeutic agent.
- Co-administration includes administration of unit dosages of the compound before or after administration of unit dosages of one or more other active agents, for example, administration of the compound within seconds, minutes, or hours of the administration of one or more other active agents.
- a unit dose of the compound can be administered first, followed within seconds or minutes by administration of a unit dose of one or more other active agents.
- a unit dose of one or more other active agents can be administered first, followed by administration of a unit dose of the compound within seconds or minutes.
- the present application provides for the use of a compound of the present invention, or a pharmaceutically acceptable salt thereof, for the preparation of a medicament for treating an HCV infection.
- an antiviral effective daily amount would be from 0.01 mg/kg to 500 mg/kg body weight, more preferably from 0.1 mg/kg to 50 mg/kg body weight. It may be appropriate to administer the required dose as two, three, four or more sub-doses at appropriate intervals throughout the day. Said sub-doses may be formulated as unit dosage forms, for example, containing 1 to 1000 mg, and in particular 5 to 200 mg of active ingredient per unit dosage form.
- the exact dosage and frequency of administration depends on the particular compound of formula (I) or (II) used, the particular condition being treated, the severity of the condition being treated, the age, weight, sex, extent of disorder and general physical condition of the particular patient as well as other medication the individual may be taking, as is well known to those skilled in the art. Furthermore, it is evident that said effective daily amount may be lowered or increased depending on the response of the treated subject and/ or depending on the evaluation of the physician prescribing the compounds of the instant invention. The effective daily amount ranges mentioned hereinabove are therefore only guidelines.
- an article of manufacture comprising a composition effective to treat an HCV infection or to inhibit the NS3 protease of HCV; and packaging materia] comprising a label which indicates that the composition can be used to treat infection by the hepatitis C virus; wherein the composition comprises a compound of the formula (I) or (II) or any subgroup thereof, or the combination as described herein.
- Step 1 (IR, 2S)-[2-Vinyl-l-(l- methylcyclopropoxysulfonylaminocarbonypcyclopropylj-carbamic acid tert- butyl ester
- Step 2 (IR, 2S)-l-Amino-2-vinylcyclopropanecarbonyl)-sulfamic acid 1- methyl-cyclo propyl ester hydrochloride
- NS3 Enzymatic Potency Purified NS3 protease is complexed with NS4A peptide and then incubated with serial dilutions of compound (DMSO used as solvent). Reactions are started by addition of dual-labeled peptide substrate and the resulting kinetic increase in fluorescence is measured. Nonlinear regression of velocity data is performed to calculate ICsos. Activity is initially tested against genotype Ib protease. Depending on the potency obtained against genotype Ib, additional genotypes (Ia, 2a, 3) and or protease inhibitor resistant enzymes (D168Y, D168V, or A156T mutants) may be tested. BILN-2061 is used as a control during all assays. Representative compounds of the invention were evaluated in this assay and were typically found to have 1C.50 values of less than about 1 ⁇ m.
- Huh-luc cells stably replicating Bartenschlager's I3891uc-ubi-neo/NS3-3'/ET genotype Ib replicon
- DMSO is used as solvent
- Replicon copy number is measured by bioluminescence and nonlinear regression, is performed to calculate EC50S.
- Parallel plates treated with the same drug dilutions are assayed for cytotoxicity using the Promega CellTiter- GIo cell viability assay.
- compounds may be tested against a genotype Ia replicon and/ or inhibitor resistant replicons encoding D 168 Y or A156T mutations.
- B ⁇ LN-2061 is used as a control during all assays.
- Representative compounds of the invention were evaluated in this assay and were typically found to have EC50 values of less than about 5 ⁇ m. Effect of serum proteins on replicon potency
- Replicon assays are conducted in normal cell culture medium (DMEM + 10%FBS) supplemented with physiologic concentrations of human serum albumin (40 mg/mL) or a-acid glycoprotein (1 mg/mL). ECsos in the presence of human serum proteins are compared to the EC50 in normal medium to determine the fold shift in potency.
- Enyzmatic Selectivity The inhibition of mammalian proteases including Porcine Pancreatic Elastase, Human Leukocyte Elastase, Protease 3, and Cathepsin D are measured at K m for the respective substrates for each enzyme. IC50 for each enzyme is compared to the IC50 obtained with NS3 Ib protease to calculate selectivity. Representative compounds of the invention have shown activity.
- MT-4 Cell Cytotoxicity 3V1T4 cells are treated with serial dilutions of compounds for a five day period. Cell viability is measured at the end of the treatment period using the Promega CeilTiter-Glo assay and non-linear regression is performed to calculate CCso-
- Huh-luc cultures are incubated with compound at concentrations equal to EC50. At multiple time points (0 — 72 hours), cells are washed 2X with cold medium and extracted with 85% acetonitrile; a sample of the media at each time-point will also be extracted. Cell and media extracts are analyzed by LC/ MS/ MS to determine the Molar concentration of compounds in each fraction. Representative compounds of the invention have shown activity.
- Solubility is determined by taking an aliquot of 10 mM DMSO stock solution and preparing the compound at a final concentration of 100 ⁇ M in the test media solutions (PBS, pH 7,4 and 0.1 N HCl, pH 1.5) with a total DMSO concentration of 1%.
- the test media solutions are incubated at room temperature with shaking for 1 hr.
- the solutions will then be centrifuged and the recovered supernatants are assayed on the HPLC/ UV. Solubility will be calculated by comparing the amount of compound detected in the defined test solution compared to the amount detected in DMSO at the same concentration. Stability of compounds after an 1 hour incubation with PBS at 37°C will also be determined.
- Cryopreserved Human, Dog, and Rat Hepatocytes Each compound is incubated for up to 1 hour in hepatocyte suspensions (100 ⁇ l 80,000 cells per well) at 37°C. Cryopreserved hepatocytes are reconstituted in the serum-free incubation medium. The suspension is transferred into 96- well plates (50 ⁇ L/well). The compounds are diluted to 2 ⁇ M in incubation medium and then are added to hepatocyte suspensions to start the incubation. Samples are taken at 0, 10, 30 and 60 minutes after the start of incubation and reaction will be quenched with a mixture consisting of 0.3% formic acid in 90% acetonitrile/10% water.
- the concentration of the compound in each sample is analyzed using LC/ MS/ MS.
- the disappearance half-life of the compound in hepatocyte suspension is determined by fitting the concentration-time data with a monophasic exponential equation.
- the data will also be scaled up to represent intrinsic hepatic clearance and/ or total hepatic clearance.
- Caco-2 Permeability Compounds are assayed via a contract service (Absorption Systems, Exton, PA). Compounds are provided to the contractor in a blinded manner. Both forward (Ato-B) and reverse (B-to-A) permeability will be measured. Caco-2 monolayers are grown to confluence on collagen- coated, microporous, polycarbonate membranes in 12- well Costar Transwell® plates. The compounds are dosed on the apical side for forward permeability (A-toB), and are dosed on the basolateral side for reverse permeability (B-to- A). The cells are incubated at 37°C with 5% CCb in a humidified incubator.
- Plasma Protein binding is measured by equilibrium dialysis. Each compound is spiked into blank plasma at a final concentration of 2 ⁇ M. The spiked plasma and phosphate buffer is placed into opposite sides of the assembled dialysis cells, which will then be rotated slowly in a 37°C water bath. At the end of the incubation, the concentration of the compound in plasma and phosphate buffer is determined. The percent unbound is calculated using the following equation:
- Cf and Cb are free and bound concentrations determined as the post-dialysis buffer and plasma concentrations, respectively.
- CYP450 Profiling Each compound is incubated with each of 5 recombinant human CYP450 enzymes, including CYPl A2, CYP2C9, CYP3A4, CYP2D6 and CYP2C19 in the presence and absence of NADPH. Serial samples will be taken from the incubation mixture at the beginning of the incubation and at 5, 15, 30, 45 and 60 min after the start of the incubation. The concentration of the compound in the incubation mixture is determined by LC/ MS/ MS. The percentage of the compound remaining after incubation at each time point is calculated by comparing with the sampling at the start of incubation.
- Rat, Don, Monkey and Human Plasma Compounds will be incubated for up to 2 hours in plasma (rat, dog, monkey, or human) at 37 Q C. Compounds are added to the plasma at final concentrations of 1 and 10 ⁇ g/mL. Aliquots are taken at 0, 5, 15, 3O 7 60, and 120 min after adding the compound. Concentration of compounds and major metabolites at each timepoint are measured by LC/ MS/ MS.
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Abstract
Description
Claims
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EP09796194A EP2367813A1 (en) | 2008-12-22 | 2009-12-16 | Antiviral compounds |
AU2009330333A AU2009330333A1 (en) | 2008-12-22 | 2009-12-16 | Antiviral compounds |
CA2746834A CA2746834A1 (en) | 2008-12-22 | 2009-12-16 | Antiviral compounds |
JP2011542369A JP2012513397A (en) | 2008-12-22 | 2009-12-16 | Antiviral compounds |
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EP (1) | EP2367813A1 (en) |
JP (1) | JP2012513397A (en) |
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AU (1) | AU2009330333A1 (en) |
CA (1) | CA2746834A1 (en) |
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WO (1) | WO2010075127A1 (en) |
Cited By (11)
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WO2011091757A1 (en) | 2010-01-27 | 2011-08-04 | AB Pharma Ltd. | Polyheterocyclic compounds highly potent as hcv inhibitors |
US8957203B2 (en) | 2011-05-05 | 2015-02-17 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
US8962810B2 (en) | 2011-06-16 | 2015-02-24 | AB Pharma Ltd. | Macrocyclic heterocyclic compound for inhibiting hepatitis C virus and preparation and use thereof |
US9334279B2 (en) | 2012-11-02 | 2016-05-10 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
US9409943B2 (en) | 2012-11-05 | 2016-08-09 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
US9499550B2 (en) | 2012-10-19 | 2016-11-22 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
US9580463B2 (en) | 2013-03-07 | 2017-02-28 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
US9598433B2 (en) | 2012-11-02 | 2017-03-21 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
US9643999B2 (en) | 2012-11-02 | 2017-05-09 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
WO2019113462A1 (en) | 2017-12-07 | 2019-06-13 | Emory University | N4-hydroxycytidine and derivatives and anti-viral uses related thereto |
US11628181B2 (en) | 2014-12-26 | 2023-04-18 | Emory University | N4-hydroxycytidine and derivatives and anti-viral uses related thereto |
Families Citing this family (3)
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MX2010011306A (en) | 2008-04-15 | 2010-11-09 | Intermune Inc | Novel macrocyclic inhibitors of hepatitis c virus replication. |
JP2012505897A (en) * | 2008-10-15 | 2012-03-08 | インターミューン・インコーポレーテッド | Antiviral peptide for treatment |
AR075584A1 (en) | 2009-02-27 | 2011-04-20 | Intermune Inc | THERAPEUTIC COMPOSITIONS THAT INCLUDE beta-D-2'-DESOXI-2'-FLUORO-2'-C-METHYLYCTIDINE AND A CARDIEX ISOINDOL ACID DERIVATIVE AND ITS USES. COMPOUND. |
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- 2009-12-16 AR ARP090104923A patent/AR074758A1/en unknown
- 2009-12-16 WO PCT/US2009/068207 patent/WO2010075127A1/en active Application Filing
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WO2011091757A1 (en) | 2010-01-27 | 2011-08-04 | AB Pharma Ltd. | Polyheterocyclic compounds highly potent as hcv inhibitors |
US8957203B2 (en) | 2011-05-05 | 2015-02-17 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
US9527885B2 (en) | 2011-05-05 | 2016-12-27 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
US8962810B2 (en) | 2011-06-16 | 2015-02-24 | AB Pharma Ltd. | Macrocyclic heterocyclic compound for inhibiting hepatitis C virus and preparation and use thereof |
US9499550B2 (en) | 2012-10-19 | 2016-11-22 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
US9334279B2 (en) | 2012-11-02 | 2016-05-10 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
US9598433B2 (en) | 2012-11-02 | 2017-03-21 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
US9643999B2 (en) | 2012-11-02 | 2017-05-09 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
US9409943B2 (en) | 2012-11-05 | 2016-08-09 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
US9580463B2 (en) | 2013-03-07 | 2017-02-28 | Bristol-Myers Squibb Company | Hepatitis C virus inhibitors |
US11628181B2 (en) | 2014-12-26 | 2023-04-18 | Emory University | N4-hydroxycytidine and derivatives and anti-viral uses related thereto |
WO2019113462A1 (en) | 2017-12-07 | 2019-06-13 | Emory University | N4-hydroxycytidine and derivatives and anti-viral uses related thereto |
US11331331B2 (en) | 2017-12-07 | 2022-05-17 | Emory University | N4-hydroxycytidine and derivatives and anti-viral uses related thereto |
US11903959B2 (en) | 2017-12-07 | 2024-02-20 | Emory University | N4-hydroxycytidine and derivatives and anti-viral uses related thereto |
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AU2009330333A1 (en) | 2011-07-07 |
UY32332A (en) | 2010-07-30 |
EP2367813A1 (en) | 2011-09-28 |
AR074758A1 (en) | 2011-02-09 |
TW201036612A (en) | 2010-10-16 |
CA2746834A1 (en) | 2010-07-01 |
US20100173939A1 (en) | 2010-07-08 |
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