WO2006008556A1 - Imidazole and thiazole derivatives as antiviral agents - Google Patents
Imidazole and thiazole derivatives as antiviral agents Download PDFInfo
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- WO2006008556A1 WO2006008556A1 PCT/GB2005/050111 GB2005050111W WO2006008556A1 WO 2006008556 A1 WO2006008556 A1 WO 2006008556A1 GB 2005050111 W GB2005050111 W GB 2005050111W WO 2006008556 A1 WO2006008556 A1 WO 2006008556A1
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- 0 CCOC(C(S1)=C(C)N(C2)C1=*C2c1ccccc1)=O Chemical compound CCOC(C(S1)=C(C)N(C2)C1=*C2c1ccccc1)=O 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D495/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms
- C07D495/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms in which the condensed system contains two hetero rings
- C07D495/04—Ortho-condensed systems
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
- A61K31/4164—1,3-Diazoles
- A61K31/4188—1,3-Diazoles condensed with other heterocyclic ring systems, e.g. biotin, sorbinil
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
- A61K31/425—Thiazoles
- A61K31/429—Thiazoles condensed with heterocyclic ring systems
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- A61K38/17—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- A61K38/19—Cytokines; Lymphokines; Interferons
- A61K38/21—Interferons [IFN]
- A61K38/212—IFN-alpha
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- A61K38/17—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- A61K38/19—Cytokines; Lymphokines; Interferons
- A61K38/21—Interferons [IFN]
- A61K38/215—IFN-beta
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- A61K38/17—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- A61K38/19—Cytokines; Lymphokines; Interferons
- A61K38/21—Interferons [IFN]
- A61K38/217—IFN-gamma
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- 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
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- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D513/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00
- C07D513/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00 in which the condensed system contains two hetero rings
- C07D513/04—Ortho-condensed systems
Definitions
- This invention relates to compounds which can act as inhibitors of viral polymerases, especially the hepatitis C virus (HCV) polymerase, to uses of such compounds in the treatment and prevention of infection by hepatitis C virus, and to their preparation.
- HCV hepatitis C virus
- HCV hepatitis C virus
- NANB-H non-A, non-B hepatitis
- RNA-dependent RNA polymerase RNA-dependent RNA polymerase
- HCV hepatitis C virus
- A represents the rest of the carbocycle or heterocycle
- R, R 1 , R 2 , R 3 , R 4 , R 5 and Y are defined therein.
- Het is a bicyclic heterocycle of formula:
- R a , A, B, E, Ar, R 1 , D, G, X, Y and Z are defined therein.
- A represents an optionally substituted polyheterocyclic group except benzimidazolyl, indolyl, 4,7-dihydrobenzimidazolyl and 2,3-dihydrobenzoxazinyl, and R 1 , R 2 and X are defined therein.
- Khozeeva et al. disclose the compound of the following structure:
- Robert et al. disclose the compound of the following structure and a process for its preparation:
- A, B and D are each C, N, O or S;
- E and F are C or N; the dotted circle within the five-membered ring indicates that the ring may be unsaturated or partially saturated;
- R 1 is hydrogen or C 1-6 alkyl
- R 2 is halogen, hydroxy, C 1-6 alkyl, C 2-6 alkenyl, C 1-6 alkoxy or aryl;
- G is hydrogen, C 1-6 alkyl, C 2-6 alkenyl, where said C 1-6 alkyl and C 2-6 alkenyl groups are optionally substituted by C 1-4 alkoxy or up to 5 fluorine atoms, or a non- aromatic ring of 3 to 8 ring atoms where said ring may contain a double bond and/or may contain an O, S, SO, SO 2 or NH moiety and where said ring is optionally substituted by methyl, ethyl or fluorine, or aryl;
- Ar is a moiety containing at least one aromatic ring and possesses 5-, 6-, 9- or 10-ring atoms optionally containing 1, 2 or 3 heteroatoms independently selected from N, O and S.
- A, B and D are C, N or S.
- A is S when B is C, and A is C when B is S.
- D is N.
- both five-membered rings are unsaturated.
- R 1 is hydrogen or C 1-4 alkyl.
- R 1 is hydrogen, methyl or ethyl. More preferably, R 1 is hydrogen.
- R 2 is C 1-6 alkyl, C 1-6 alkoxy or aryl.
- R 2 is C 1-4 alkyl or aryl. More preferably, R 2 is methyl or phenyl.
- R 2 is absent.
- G is hydrogen, C 3-8 cycloalkyl, C 3-8 cycloalkenyl or aryl.
- G is hydrogen, cyclohexyl, cyclohexenyl or phenyl. More preferably, G is cyclohexyl or cyclohexenyl.
- Ar is a 5- or 6-membered aromatic ring, optionally containing 1, 2 or 3 heteroatoms independently selected from N, O and S.
- Ar is a 6-membered ring containing 0, 1 or 2 N atoms, such as phenyl, 1-pyridyl, 2- pyridyl, 3-pyridyl, pyridazinyl, pyrimidinyl and pyrazinyl. More preferably, Ar is phenyl.
- A is S when B is C and A is C when B is S. More preferably, A is C and B is S.
- R 2 is C 1-6 alkyl or aryl. More preferably, R 2 is methyl or phenyl. Preferably, R 2 is absent.
- G is hydrogen, C 3-8 cycloalkyl, C 3-8 cycloalkenyl or aryl. More preferably, G is cyclohexyl or cyclohexenyl. More preferably, G is cyclohexyl.
- Ar is a 6-membered ring containing 0, 1 or 2 N atoms. More preferably, Ar is phenyl. In a further embodiment of the present invention, there is provided the use of a compound of formula (Ib):
- A is S when D is N and A is N when D is S. More preferably, A is S and D is N.
- R 2 is C 1-6 alkyl or aryl. More preferably, R 2 is methyl or phenyl. Preferably, R 2 is absent.
- G is hydrogen, C 3-8 cycloalkyl, C 3-8 cycloalkenyl or aryl.
- Ar is a 6-membered ring containing 0, 1 or 2 N atoms. More preferably, Ar is phenyl.
- alkyl or "alkoxy" as a group or part of a group means that the group is straight or branched.
- suitable alkyl groups include methyl, ethyl, n-propyl, i-propyl, n-butyl, s-butyl and t-butyl.
- suitable alkoxy groups include methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, s- butoxy and t-butoxy.
- cycloalkyl groups referred to herein may represent, for example, cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl.
- alkenyl as a group or part of a group means that the group is straight or branched.
- suitable alkenyl groups include vinyl and allyl.
- cycloalkenyl groups referred to herein may represent, for example 1- or 2-cyclobutenyl, 1-, 2- or 3-cyclopentenyl or 1-, 2- or 3-cyclohexenyl.
- aryl as a group or part of a group means a carbocyclic aromatic ring.
- suitable aryl groups include phenyl and naphthyl.
- halogen means fluorine, chlorine, bromine and iodine. Preferred halogens are fluorine and chlorine.
- substituents may be present.
- Optional substituents may be attached to the compounds or groups which they substitute in a variety of ways, either directly or through a connecting group of which the following are examples: amine, amide, ester, ether, thioether, sulfonamide, sulfamide, sulfoxide, urea, thiourea and urethane.
- an optional substituent may itself be substituted by another substituent, the latter being connected directly to the former or through a connecting group such as those exemplified above.
- Specific compounds within the scope of this invention include: l-cyclohexyl-2-phenyl-lH-thieno[3,2- ⁇ /]imidazole-5-carboxylic acid, 3-cyclohexyl-2-phenyl-3H-thieno[2,3- ⁇ /]imidazole-5-carboxylic acid, 3-cyclohexyl-6-methyl-2-phenyl-3-thieno[2,3- ⁇ /]imidazole-5-carboxylic acid, 3-cyclohexyl-2,6-diphenyl-3H-thieno[2,3- ⁇ /]imidazole-5-carboxylic acid, 5,6-diphenylimidazo[2, 1 -b] [ 1 ,3]thiazole-2-carboxylic acid, 6-phenylimidazo[2, 1 -b]thiazole-2-carboxylic acid,
- the salts of the compounds of formula (I) will be non ⁇ toxic pharmaceutically acceptable salts.
- Other salts may, however, be useful in the preparation of the compounds according to the invention or of their non-toxic pharmaceutically acceptable salts.
- Suitable pharmaceutically acceptable salts of the compounds of this invention include acid addition salts which may, for example, be formed by mixing a solution of the compound according to the invention with a solution of a pharmaceutically acceptable acid such as hydrochloric acid, fumaric acid, p-toluenesulfonic acid, maleic acid, succinic acid, acetic acid, citric acid, tartaric acid, carbonic acid, phosphoric acid or sulfuric acid.
- a pharmaceutically acceptable acid such as hydrochloric acid, fumaric acid, p-toluenesulfonic acid, maleic acid, succinic acid, acetic acid, citric acid, tartaric acid, carbonic acid, phosphoric acid or sulfuric acid.
- Salts of amine groups may also comprise quaternary ammonium salts in which the amino nitrogen atom carries a suitable organic group such as an alkyl, alkenyl, alkynyl or aralkyl moiety.
- suitable pharmaceutically acceptable salts thereof may include metal salts such as alkali metal salts, e.g. sodium or potassium salts; and alkaline earth metal salts, e.g. calcium or magnesium salts.
- the salts may be formed by conventional means, such as by reacting the free base form of the product with one or more equivalents of the appropriate acid in a solvent or medium in which the salt is insoluble, or in a solvent such as water which is removed in vacuo or by freeze drying or by exchanging the anions of an existing salt for another anion on a suitable ion exchange resin.
- the present invention includes within its scope prodrugs of the compounds of formula (I) above.
- prodrugs will be functional derivatives of the compounds of formula (I) which are readily convertible in vivo into the required compound of formula (I).
- Conventional procedures for the selection and preparation of suitable prodrug derivatives are described, for example, in "Design of Prodrugs", ed. H. Bundgaard, Elsevier, 1985.
- a prodrug may be a pharmacologically inactive derivative of a biologically active substance (the "parent drug” or “parent molecule”) that requires transformation within the body in order to release the active drug, and that has improved delivery properties over the parent drug molecule.
- the transformation in vivo may be, for example, as the result of some metabolic process, such as chemical or enzymatic hydrolysis of a carboxylic, phosphoric or sulfate ester, or reduction or oxidation of a susceptible functionality.
- the present invention includes within its scope solvates of the compounds of formula (I) and salts thereof, for example, hydrates.
- the present invention also includes within its scope any enantiomers, diastereomers, geometric isomers and tautomers of the compounds of formula (I). It is to be understood that all such isomers and mixtures thereof are encompassed within the scope of the invention.
- a method of inhibiting hepatitis C virus polymerase and/or of treating or preventing an illness due to hepatitis C virus the method involving administering to a human or animal (preferably mammalian) subject suffering from the condition a therapeutically or prophylactically effective amount of the pharmaceutical composition described above or of a compound of formula (I), (Ia) or (Ib) as defined above, or a pharmaceutically acceptable salt thereof.
- Effective amount means an amount sufficient to cause a benefit to the subject or at least to cause a change in the subject's condition.
- a compound of formula (I), (Ia) or (Ib), or a pharmaceutically acceptable salt thereof for the manufacture of a medicament for the treatment or prevention of infection by hepatitis C virus, in combination with one or more other agents for the treatment of viral infections such as an antiviral agent, and/or an immunomodulatory agent such as a-, ⁇ - or ⁇ -interferon, particularly ⁇ -interferon.
- Suitable antiviral agents include ribavirin and inhibitors of hepatitis C virus (HCV) polymerase, such as inhibitors of metalloprotease (NS2-3), serine protease (NS3), helicase (NS3) and RNA-dependent RNA polymerase (NS5B).
- HCV hepatitis C virus
- a further aspect of the invention provides a pharmaceutical composition
- a pharmaceutical composition comprising l-cyclohexyl-2-phenyl-lH-thieno[3,2- ⁇ /]imidazole-5-carboxylic acid, 3-cyclohexyl-2-phenyl-3H-thieno[2,3- ⁇ /]imidazole-5-carboxylic acid, 3-cyclohexyl-6-methyl-2-phenyl-3-thieno[2,3- ⁇ /]imidazole-5-carboxylic acid, 3-cyclohexyl-2,6-diphenyl-3H-thieno[2,3- ⁇ /]imidazole-5-carboxylic acid, 5,6-diphenylimidazo[2, 1 -b] [ 1 ,3]thiazole-2-carboxylic acid, 6-phenylimidazo[2, 1 -b]thiazole-2-carboxylic acid, 5-cyclohex- 1 -en- 1 -yl-6-phenylim
- the composition may be in any suitable form, depending on the intended method of administration. It may for example be in the form of a tablet, capsule or liquid for oral administration, or of a solution or suspension for administration parenterally .
- the composition may be prepared by admixing at least one active ingredient, or a pharmaceutically acceptable salt thereof, with one or more pharmaceutically acceptable adjuvants, diluents or carriers and/or with one or more other therapeutically or prophylactically active agents.
- a further aspect of the invention provides l-cyclohexyl-2-phenyl-lH-thieno[3,2- ⁇ /]imidazole-5-carboxylic acid, 3-cyclohexyl-2-phenyl-3H-thieno[2,3- ⁇ /]imidazole-5-carboxylic acid, 3-cyclohexyl-6-methyl-2-phenyl-3-thieno[2,3- ⁇ /]imidazole-5-carboxylic acid, 3-cyclohexyl-2,6-diphenyl-3H-thieno[2,3- ⁇ /]imidazole-5-carboxylic acid, 5,6-diphenylimidazo[2, 1 -b] [ 1 ,3]thiazole-2-carboxylic acid, 6-phenylimidazo[2,l-b]thiazole-2-carboxylic acid,
- a further aspect of the invention provides l-cyclohexyl-2-phenyl-lH-thieno[3,2- ⁇ /]imidazole-5-carboxylic acid, 3-cyclohexyl-2-phenyl-3H-thieno[2,3- ⁇ /]imidazole-5-carboxylic acid, 3-cyclohexyl-6-methyl-2-phenyl-3-thieno[2,3- ⁇ /]imidazole-5-carboxylic acid, 3-cyclohexyl-2,6-diphenyl-3H-thieno[2,3- ⁇ /]imidazole-5-carboxylic acid, 5,6-diphenylimidazo[2, 1 -b] [ 1 ,3]thiazole-2-carboxylic acid, 6-phenylimidazo[2, 1 -b]thiazole-2-carboxylic acid,
- the dosage rate at which the compound is administered will depend on a variety of iactors including the activity of the specific compound employed, the metabolic stability and length of action of that compound, the age of the patient, body weight, general health, sex, diet, mode and time of administration, rate of excretion, drug combination, the severity of the particular condition and the host undergoing therapy.
- suitable dosage levels may be of the order of 0.02 to 5 or 10 g per day, with oral dosages two to five times higher. For instance, administration of from 10 to 50 mg of the compound per kg of body weight from one to three times per day may be in order. Appropriate values are selectable by routine testing.
- the compound may be administered alone or in combination with other treatments, either simultaneously or sequentially. For instance, it may be administered in combination with effective amounts of antiviral agents, immunomodulators, anti- infectives or vaccines known to those of ordinary skill in the art. It may be administered by any suitable route, including orally, intravenously, cutaneously and subcutaneously. It may be administered directly to a suitable site or in a manner in which it targets a particular site, such as a certain type of cell. Suitable targeting methods are already known.
- compounds of formula (I), where A is S, B and F are C, D and E are N, and R 2 is absent, may be prepared by reacting a compound of formula (II):
- the starting material of formula (III) may be prepared by methods analogous to those described in the accompanying Examples, or by standard methods well known from the art.
- a compound of formula (I) wherein R 1 represents hydrogen may be converted into the corresponding compound wherein R 1 is other than hydrogen by means of conventional esterification procedures, e.g. by treatment with the appropriate alcohol of formula R 1 -OH in the presence of a mineral acid such as hydrochloric acid.
- a compound of formula (I) wherein R 1 is other than hydrogen may be converted into the corresponding compound wherein R 1 is hydrogen by means of standard saponification techniques, e.g. by treatment with an alkaline reagent such as sodium hydroxide or lithium hydroxide.
- the desired product can be separated therefrom at an appropriate stage by conventional methods such as preparative HPLC; or column chromatography utilising, for example, silica and/or alumina in conjunction with an appropriate solvent system.
- conventional methods such as preparative HPLC; or column chromatography utilising, for example, silica and/or alumina in conjunction with an appropriate solvent system.
- protecting groups such as those described in Protective Groups in Organic Chemistry, ed. J.F.W. McOmie, Plenum Press, 1973; and T. W. Greene & P.G.M. Wuts, Protective Groups in Organic Synthesis, John Wiley & Sons, 3rd edition, 1999.
- the protecting groups may be removed at a convenient subsequent stage using methods known from the art.
- the following Examples are illustrative of the invention.
- the compounds of the invention were tested for inhibitory activity against the HCV RNA dependent RNA polymerase (NS5B) in an enzyme inhibition assay (example i) and generally have IC50's below 50 ⁇ M.
- WO 96/37619 describes the production of recombinant HCV RdRp from insect cells infected with recombinant baculovirus encoding the enzyme.
- the purified enzyme was shown to possess in vitro RNA polymerase activity using RNA as template.
- the reference describes a polymerisation assay using poly(A) and oligo(U) as a primer or an heteropolymeric template.
- Incorporation of tritiated UTP or NTPs is quantified by measuring acid- insoluble radioactivity.
- the present inventors have employed this assay to screen the various compounds described above as inhibitors of HCV RdRp. Incorporation of radioactive UMP was measured as follows.
- the standard reaction (50 ⁇ l) was carried out in a buffer containing 20 mM tris/HCl pH 7.5, 5 mM MgCl 2 , 1 mM DTT, 50 mM NaCl, 0.03% N-octylglucoside, 1 ⁇ Ci [ 3 H]-UTP (40 Ci/mmol, NEN), 10 ⁇ M UTP and 10 ⁇ g/ml ⁇ oly(A) or 5 ⁇ M NTPs and 5 ⁇ g/ml heteropolymeric template.
- OHgO(U) 12 (1 ⁇ g/ml, Genset) was added as a primer in the assay working on PoIy(A) template.
- the final NS5B enzyme concentration was 5 nM.
- MS data were obtained on a Perkin Elmer API 100 operating in negative (ES " ) or positive (ES + ) ionization mode and results are reported as the ratio of mass over charge (m/z) for the parent ion only.
- Preparative scale HPLC separations were carried out on a Waters Delta Prep 4000 separation module, equipped with a Waters 486 absorption detector or on a Gilson preparative system. In all cases compounds were eluted with linear gradients of water and acetonitrile both containing 0.1% TFA using flow rates between 15 and 25 mL/min. The following abbreviations are used in the examples:
- Step 1 ethyl N-cyclohexylglycinate
- Step 2 JV ⁇ -cyclohexylglycinamide A methanolic solution OfNH 3 (2 M, 5 eq.) was added to a pressure vessel containing ethyl N-cyclohexylglycinate (from Step 1). The vessel was closed and the reaction mixture was heated at 100°C overnight. Subsequent evaporation of the solvent, followed by trituration with petroleum ether and filtration gave the title compound (73%) as a solid.
- Step 3 l-cvclohexyl-2-phenyl-l,5-dihydro-4H-imidazol-4-one
- Step 4 4-chloro- 1 -cyclohexyl-2-phenyl- lH-imidazole-5-carbaldehyde
- Step 5 ethyl l-cyclohexyl-2-phenyl-lH-thienor3,2-dlimidazole-5-carboxylate
- Step 6 l-cvclohexyl-2-phenyl-lH-thienor3,2-dlimidazole-5-carboxylic acid
- a solution (0.25 M) of ethyl l-cyclohexyl-2-phenyl-lH-thieno[3,2-d]imidazole-5- carboxylate (from Step 5) in MeO ⁇ /T ⁇ F (1:1) was treated with aqueous NaOH (1 N solution, 2 eq.) and the reaction stirred at RT for 4 h. The reaction mixture was concentrated and acidified with aqueous HCl (1 N).
- Step 1 JV-cyclohexylbenzamide A solution (0.47 M) of cyclohexylamine in DCM was added dropwise to a stirred solution (0.14 M) of benzylchloride (1.1 eq.) and Et 3 N (1.5 eq.) in DCM at 0 °C. The reaction mixture was stirred for 0.5 h at RT, then the solvents were evaporated and the residue was dissolved in AcOEt. The organic layer was washed sequentially with aqueous HCl (1 N), aqueous NaHCO 3 (saturated solution) and brine then dried and evaporated giving the title compound (95%) that was used as such in next reaction.
- Step 3 3-cvclohexyl-2-phenyl-3,5-dihvdro-4H-imidazol-4-one
- a solution (0.06 M) of iV-(azidoacetyl)-N-cyclohexylbenzamide (from Step 2) in toluene was treated with PPh 3 (1.1 eq.).
- the reaction mixture was stirred at RT for 4.5 h then solvent was evaporated and the crude was purified by flash chromatography on silica gel (1:1 AcOEt/petroleum ether) to give the title compound (77%) as a solid.
- Phosphorus oxychloride (3 eq.) was added dropwise to a solution (0.95 M, 4 eq.) of DMF in CHCl 3 at 0°C.
- the reaction mixture was allowed to warm to RT then a solution (0.16 M) of 3-cyclohexyl-2-phenyl-3,5-dihydro-4H-imidazol-4-one (from Step 3) in CHCl 3 was added.
- the reaction mixture was heated to reflux for 2 h then solvents were evaporated.
- the residue was dissolved in phosphorus oxychloride, and the resulting solution (0.12 M) was refluxed for 18 h. Then it was concentrated and the residue diluted with AcOEt and water.
- Step 5 3-cyclohexyl-2-phenyl-3H-thienor2,3-dlimidazole-5-carboxylic acid Methyl thioglycolate (1.5 eq.) was added to a solution (1.44 M, 4 eq.) of NaOMe in MeOH at RT, then a solution (0.12 M) of 5-chloro-l-cyclohexyl-2-phenyl-lH- imidazole-4-carbaldehyde (from Step 4) in MeOH was added. The reaction mixture was refluxed for 2 h.
- Step 1 l-(5-chloro-l-cvclohexyl-2-phenyl-lH-imidazol-4-yl)ethanone
- a solution (0.08 M) of 5-chloro-l-cyclohexyl-2-phenyl-lH-imidazole-4-carbaldehyde (from Example 2, Step 4) in Et 2 O was treated with MeMgBr (3 M solution in Et 2 O, 1 eq.) at 0°C.
- MeMgBr 3 M solution in Et 2 O, 1 eq.
- the reaction mixture was stirred at 0°C for 45 min then quenched with aqueous NH 4 Cl (saturated solution) and extracted with AcOEt. The combined organic layers were dried and evaporated.
- Step 2 3-cvclohexyl-6-methyl-2-phenyl-3H-thienor2,3-dlimidazole-5-carboxylic acid Methyl thioglycolate (3.0 eq.) was added at RT to a solution (0.24 M, 8 eq.) of NaOMe in MeOH, then a solution (0.015 M) of l-(5-chloro-l-cyclohexyl-2-phenyl- lH-imidazol-4-yl)ethanone (from Step 1) in MeOH was added.
- reaction was refluxed for 20 h then solvent was evaporated and the resulting residue was dissolved in T ⁇ F, and the solution (0.06 M) was treated with aqueous NaOH (1 N, 16 eq.) for 3.5 h at RT. Then, a small amount of MeOH and aqueous NaOH (1 N, 65 eq.) were added. The reaction mixture was heated at 60 °C for 5 h then it was concentrated and water was added.
- Step 1 ethyl 2-amino-l,3-thiazole-5-carboxylate
- Step 2 6-phenylimidazor2,l-biri,31thiazole-2-carboxylic acid 2-Bromo-l-phenylethanone (1 eq.) was added to a solution (0.2 M) of 2-amino-l,3- thiazole-5-carboxylate (from Step 1) in ethanol. The reaction mixture was heated to reflux overnight. After cooling down, the solvent was concentrated and the residue diluted with AcOEt. The organic phase was washed with water, brine then dried and evaporated. The residue was treated with Et 2 O affording a crude that was dissolved in ethano I/water (3:1) and aqueous NaOH (1 N, 4 eq.) was added. The reaction mixture was refluxed for 3 hours.
- Ethyl 6-phenylimidazo[2,l-b][l,3]thiazole-2-carboxylate was treated with acetic anhydride (4.25 eq.), glacial acetic acid (35 eq.), cyclohexanone (6 eq.) and 85% phosphoric acid (2.2 eq.).
- the reaction mixture was heated at 120°C overnight. After cooling down, the reaction was treated with an ice-cold NH 4 OH (saturated solution) and extracted with AcOEt.
- the combined organic layers were washed with aqueous HCl (1 N), aqueous NaHCO 3 (saturated solution) and brine then dried and evaporated.
- the crude was purified by flash chromatography on silica gel (1 :5 AcOEt/petroleum ether) affording ethyl 5-cyclohex-l-en-l-yl-6-phenylimidazo[2,l-b][l,3]thiazole-2- carboxylate.
- the above compound was dissolved in ethanol and the resulting solution (0.5 M) treated with NaOH (1 N solution, 4 eq.). The mixture was heated at 80°C for 1 h.
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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AU2005264002A AU2005264002A1 (en) | 2004-07-22 | 2005-07-14 | Imidazole and thiazole derivatives as antiviral agents |
EP05758970A EP1773331A1 (en) | 2004-07-22 | 2005-07-14 | Imidazole and thiazole derivatives as antiviral agents |
JP2007522038A JP2008506762A (en) | 2004-07-22 | 2005-07-14 | Imidazole and thiazole derivatives as antiviral agents |
CA002574354A CA2574354A1 (en) | 2004-07-22 | 2005-07-14 | Imidazole and thiazole derivatives as antiviral agents |
US11/632,754 US20080249146A1 (en) | 2004-07-22 | 2005-07-14 | Imidazole and Thioazole Derivatives as Antiviral Agents |
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GB0416396.0 | 2004-07-22 | ||
GBGB0416396.0A GB0416396D0 (en) | 2004-07-22 | 2004-07-22 | Therapeutic agents |
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WO2006008556A1 true WO2006008556A1 (en) | 2006-01-26 |
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PCT/GB2005/050111 WO2006008556A1 (en) | 2004-07-22 | 2005-07-14 | Imidazole and thiazole derivatives as antiviral agents |
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US (1) | US20080249146A1 (en) |
EP (1) | EP1773331A1 (en) |
JP (1) | JP2008506762A (en) |
CN (1) | CN1997366A (en) |
AU (1) | AU2005264002A1 (en) |
CA (1) | CA2574354A1 (en) |
GB (1) | GB0416396D0 (en) |
WO (1) | WO2006008556A1 (en) |
Cited By (28)
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EP1688420A1 (en) * | 2003-11-19 | 2006-08-09 | Japan Tobacco Inc. | 5-5-membered fused heterocyclic compound and use thereof as hcv polymerase inhibitor |
EP1923062A1 (en) * | 2006-11-16 | 2008-05-21 | sanofi-aventis | Imidazo[2,1-b]thiazoles and their use as pharmaceuticals |
WO2009076747A1 (en) | 2007-12-19 | 2009-06-25 | Boehringer Ingelheim International Gmbh | Viral polymerase inhibitors |
US7659263B2 (en) | 2004-11-12 | 2010-02-09 | Japan Tobacco Inc. | Thienopyrrole compound and use thereof as HCV polymerase inhibitor |
WO2010080874A1 (en) | 2009-01-07 | 2010-07-15 | Scynexis, Inc. | Cyclosporine derivative for use in the treatment of hcv and hiv infection |
US7767660B2 (en) | 2006-12-20 | 2010-08-03 | Istituto Di Richerche Di Biologia Molecolare P. Angeletti Spa | Antiviral indoles |
US7781422B2 (en) | 2006-12-20 | 2010-08-24 | Istituto Di Ricerche Di Biologia Molecolare P. Angeletti Spa | Antiviral indoles |
US7879797B2 (en) | 2005-05-02 | 2011-02-01 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US7973040B2 (en) | 2008-07-22 | 2011-07-05 | Merck Sharp & Dohme Corp. | Macrocyclic quinoxaline compounds as HCV NS3 protease inhibitors |
US7977331B1 (en) | 2004-02-24 | 2011-07-12 | Japan Tobacco Inc. | Tetracyclic fused heterocyclic compound and use thereof as HCV polymerase inhibitor |
US7989438B2 (en) | 2007-07-17 | 2011-08-02 | Istituto Di Ricerche Di Biologia Molecolare P. Angeletti Spa | Therapeutic compounds |
US8101595B2 (en) | 2006-12-20 | 2012-01-24 | Istituto di Ricerche di Biologia Molecolare P. Angletti SpA | Antiviral indoles |
US8138164B2 (en) | 2006-10-24 | 2012-03-20 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US8178520B2 (en) | 2006-05-15 | 2012-05-15 | Istituto Di Ricerche Di Biologia Molecolare P. Angeletti Spa | Macrocyclic compounds as antiviral agents |
US8188083B2 (en) | 2007-06-28 | 2012-05-29 | Abbott Laboratories | Triazolopyridazines |
EP2494991A1 (en) | 2007-05-04 | 2012-09-05 | Vertex Pharmaceuticals Incorporated | Combination therapy for the treatment of HCV infection |
US8278322B2 (en) | 2005-08-01 | 2012-10-02 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US8309540B2 (en) | 2006-10-24 | 2012-11-13 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US8314062B2 (en) | 2006-06-23 | 2012-11-20 | Instituto Di Ricerche Di Biologia Molecolare P. Angeletti S.P.A. | Macrocyclic compounds as antiviral agents |
US8377874B2 (en) | 2006-10-27 | 2013-02-19 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US8377873B2 (en) | 2006-10-24 | 2013-02-19 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US8461107B2 (en) | 2008-04-28 | 2013-06-11 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US8828930B2 (en) | 2009-07-30 | 2014-09-09 | Merck Sharp & Dohme Corp. | Hepatitis C virus NS3 protease inhibitors |
US8927569B2 (en) | 2007-07-19 | 2015-01-06 | Merck Sharp & Dohme Corp. | Macrocyclic compounds as antiviral agents |
US9090671B2 (en) | 2008-06-06 | 2015-07-28 | Scynexis, Inc. | Macrocyclic peptides |
CN106008393A (en) * | 2016-06-09 | 2016-10-12 | 青岛辰达生物科技有限公司 | Synthetic method of Dasatinib intermediate |
US9738661B2 (en) | 2006-10-27 | 2017-08-22 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US10385069B2 (en) | 2015-02-03 | 2019-08-20 | Active Biotech Ab | Imidazo[2,1-B]thiazole and 5,6-dihydroimidazo[2,1-B]thiazole derivatives useful as S100-inhibitors |
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EP2242752B1 (en) * | 2008-02-13 | 2012-08-08 | Bristol-Myers Squibb Company | Imidazolyl biphenyl imidazoles as hepatitis c virus inhibitors |
Citations (3)
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WO1991011451A1 (en) * | 1990-01-26 | 1991-08-08 | Sankyo Company, Limited | Griseolic acid analog and lak inhibitor containing the same |
JPH04261186A (en) * | 1991-02-14 | 1992-09-17 | Dai Ichi Seiyaku Co Ltd | Polycyclic condensed thiazole derivative |
WO2005023819A1 (en) * | 2003-09-09 | 2005-03-17 | Istituto Di Ricerche Di Biologia Molecolare P Angeletti Spa | Thienopyrroles as antiviral agents |
-
2004
- 2004-07-22 GB GBGB0416396.0A patent/GB0416396D0/en not_active Ceased
-
2005
- 2005-07-14 CN CNA2005800245686A patent/CN1997366A/en active Pending
- 2005-07-14 JP JP2007522038A patent/JP2008506762A/en not_active Withdrawn
- 2005-07-14 AU AU2005264002A patent/AU2005264002A1/en not_active Abandoned
- 2005-07-14 EP EP05758970A patent/EP1773331A1/en not_active Withdrawn
- 2005-07-14 CA CA002574354A patent/CA2574354A1/en not_active Abandoned
- 2005-07-14 WO PCT/GB2005/050111 patent/WO2006008556A1/en not_active Application Discontinuation
- 2005-07-14 US US11/632,754 patent/US20080249146A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO1991011451A1 (en) * | 1990-01-26 | 1991-08-08 | Sankyo Company, Limited | Griseolic acid analog and lak inhibitor containing the same |
JPH04261186A (en) * | 1991-02-14 | 1992-09-17 | Dai Ichi Seiyaku Co Ltd | Polycyclic condensed thiazole derivative |
WO2005023819A1 (en) * | 2003-09-09 | 2005-03-17 | Istituto Di Ricerche Di Biologia Molecolare P Angeletti Spa | Thienopyrroles as antiviral agents |
Non-Patent Citations (1)
Title |
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ROBERT J-F ET AL: "DERIVES DE I'IMIDAZO (2,1-B) THIAZOLE II. SYNTHESES D'IMIDAZO (2,1-B) THIAZOLES A CHAINES LATERALES CARBONYLESS A PARTIR D'AMINO-2 THIAZOLES", EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY, EDITIONS SCIENTIFIQUE ELSEVIER, PARIS, FR, vol. 10, no. 1, January 1975 (1975-01-01), pages 59 - 64, XP000953398, ISSN: 0223-5234 * |
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EP1688420A1 (en) * | 2003-11-19 | 2006-08-09 | Japan Tobacco Inc. | 5-5-membered fused heterocyclic compound and use thereof as hcv polymerase inhibitor |
EP1688420A4 (en) * | 2003-11-19 | 2008-10-22 | Japan Tobacco Inc | 5-5-membered fused heterocyclic compound and use thereof as hcv polymerase inhibitor |
US7977331B1 (en) | 2004-02-24 | 2011-07-12 | Japan Tobacco Inc. | Tetracyclic fused heterocyclic compound and use thereof as HCV polymerase inhibitor |
US7659263B2 (en) | 2004-11-12 | 2010-02-09 | Japan Tobacco Inc. | Thienopyrrole compound and use thereof as HCV polymerase inhibitor |
US7879797B2 (en) | 2005-05-02 | 2011-02-01 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US8278322B2 (en) | 2005-08-01 | 2012-10-02 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US8178520B2 (en) | 2006-05-15 | 2012-05-15 | Istituto Di Ricerche Di Biologia Molecolare P. Angeletti Spa | Macrocyclic compounds as antiviral agents |
US8314062B2 (en) | 2006-06-23 | 2012-11-20 | Instituto Di Ricerche Di Biologia Molecolare P. Angeletti S.P.A. | Macrocyclic compounds as antiviral agents |
US8377873B2 (en) | 2006-10-24 | 2013-02-19 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US8138164B2 (en) | 2006-10-24 | 2012-03-20 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US8309540B2 (en) | 2006-10-24 | 2012-11-13 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US9738661B2 (en) | 2006-10-27 | 2017-08-22 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US8377874B2 (en) | 2006-10-27 | 2013-02-19 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
EP1923062A1 (en) * | 2006-11-16 | 2008-05-21 | sanofi-aventis | Imidazo[2,1-b]thiazoles and their use as pharmaceuticals |
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US7767660B2 (en) | 2006-12-20 | 2010-08-03 | Istituto Di Richerche Di Biologia Molecolare P. Angeletti Spa | Antiviral indoles |
US8101595B2 (en) | 2006-12-20 | 2012-01-24 | Istituto di Ricerche di Biologia Molecolare P. Angletti SpA | Antiviral indoles |
EP2494991A1 (en) | 2007-05-04 | 2012-09-05 | Vertex Pharmaceuticals Incorporated | Combination therapy for the treatment of HCV infection |
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US7989438B2 (en) | 2007-07-17 | 2011-08-02 | Istituto Di Ricerche Di Biologia Molecolare P. Angeletti Spa | Therapeutic compounds |
US8927569B2 (en) | 2007-07-19 | 2015-01-06 | Merck Sharp & Dohme Corp. | Macrocyclic compounds as antiviral agents |
WO2009076747A1 (en) | 2007-12-19 | 2009-06-25 | Boehringer Ingelheim International Gmbh | Viral polymerase inhibitors |
US8461107B2 (en) | 2008-04-28 | 2013-06-11 | Merck Sharp & Dohme Corp. | HCV NS3 protease inhibitors |
US9090671B2 (en) | 2008-06-06 | 2015-07-28 | Scynexis, Inc. | Macrocyclic peptides |
US8080654B2 (en) | 2008-07-22 | 2011-12-20 | Insituto di Ricerche di Biologia Molecolare P. Angeletti SpA | Macrocyclic quinoxaline compounds as HCV NS3 protease inhibitors |
US7973040B2 (en) | 2008-07-22 | 2011-07-05 | Merck Sharp & Dohme Corp. | Macrocyclic quinoxaline compounds as HCV NS3 protease inhibitors |
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US8828930B2 (en) | 2009-07-30 | 2014-09-09 | Merck Sharp & Dohme Corp. | Hepatitis C virus NS3 protease inhibitors |
US10385069B2 (en) | 2015-02-03 | 2019-08-20 | Active Biotech Ab | Imidazo[2,1-B]thiazole and 5,6-dihydroimidazo[2,1-B]thiazole derivatives useful as S100-inhibitors |
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Also Published As
Publication number | Publication date |
---|---|
CN1997366A (en) | 2007-07-11 |
CA2574354A1 (en) | 2006-01-26 |
US20080249146A1 (en) | 2008-10-09 |
JP2008506762A (en) | 2008-03-06 |
AU2005264002A1 (en) | 2006-01-26 |
EP1773331A1 (en) | 2007-04-18 |
GB0416396D0 (en) | 2004-08-25 |
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