Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
  • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
  • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
  • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
  • C07D213/72—Nitrogen atoms
  • C07D213/73—Unsubstituted amino or imino radicals
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P7/00—Drugs for disorders of the blood or the extracellular fluid
  • A61P7/02—Antithrombotic agents; Anticoagulants; Platelet aggregation inhibitors
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C257/00—Compounds containing carboxyl groups, the doubly-bound oxygen atom of a carboxyl group being replaced by a doubly-bound nitrogen atom, this nitrogen atom not being further bound to an oxygen atom, e.g. imino-ethers, amidines
  • C07C257/10—Compounds containing carboxyl groups, the doubly-bound oxygen atom of a carboxyl group being replaced by a doubly-bound nitrogen atom, this nitrogen atom not being further bound to an oxygen atom, e.g. imino-ethers, amidines with replacement of the other oxygen atom of the carboxyl group by nitrogen atoms, e.g. amidines
  • C07C257/18—Compounds containing carboxyl groups, the doubly-bound oxygen atom of a carboxyl group being replaced by a doubly-bound nitrogen atom, this nitrogen atom not being further bound to an oxygen atom, e.g. imino-ethers, amidines with replacement of the other oxygen atom of the carboxyl group by nitrogen atoms, e.g. amidines having carbon atoms of amidino groups bound to carbon atoms of six-membered aromatic rings
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
  • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
  • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
  • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
  • C07D213/72—Nitrogen atoms
  • C07D213/74—Amino or imino radicals substituted by hydrocarbon or substituted hydrocarbon radicals
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
  • C07D295/22—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with hetero atoms directly attached to ring nitrogen atoms
  • C07D295/26—Sulfur atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
  • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
  • C07D405/12—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a chain containing hetero atoms as chain links

Definitions

• Thrombin is a serine protease present in blood plasma in the form of a precursor, prothrombin. Thrombin plays a central role in the mechanism of blood coagulation by converting the solution plasma protein, fibrinogen, into insoluble fibrin.
• European Publication 363 284 describes analogs of peptidase substrates in which the nitrogen atom of the scissile amide group of the substrate peptide has been replaced by hydrogen or a substituted carbonyl moiety,
• Australian Publication 86245677 also describes peptidase inhibitors having an activated electrophilic ketone moiety such as fluoromethylene ketone or ⁇ -keto carboxyl derivatives.
• Thrombin inhibitors described in prior publications contain sidechains of arginine and lysine. These structures show low selectivity for thrombin over other trypsin-like enzymes. Some of them show toxicity of hypotension and liver toxicity.
• European Publication 601 459 describes sulfonamido heterocyclic thrombin inhibitors, such as N-[4-[(aminoimino- methyl)amino]butyl]-l-[N-(2-naphthalenylsulfonyl)-L-phenylalanyl]-L- prolinamide.
• WO 94/29336 describes compounds which are useful as thrombin inhibitors.
• the invention includes a composition for inhibiting loss of blood platelets, inhibiting formation of blood platelet aggregates, inhibiting formation of fibrin, inhibiting thrombus formation, -and inhibiting embolus formation in a mammal, comprising a compound of the invention in a pharmaceutically acceptable carrier.
• compositions may optionally include anticoagulants, antiplatelet agents, and thrombolytic agents.
• the compositions can be added to blood, blood products, or mammalian organs in order to effect the desired inhibitions.
• the invention also includes a composition for preventing or treating unstable angina, refractory angina, myocardial infarction, transient ischemic attacks, atrial fibrillation, thrombotic stroke, embolic stroke, deep vein thrombosis, disseminated intravascular coagulation, ocular build up of fibrin, and reocclusion or restenosis of recanalized vessels, in a mammal, comprising a compound of the invention in a pharmaceutically acceptable carrier.
• These compositions may optionally include anticoagulants, antiplatelet agents, and thrombolytic agents.
• the invention also includes die use of a compound of the invention in the manufacture of a medicament for preventing or treating unstable angina, refractory angina, myocardial infarction, transient ischemic attacks, atrial fibrillation, thrombotic stroke, embolic stroke, deep vein thrombosis, disseminated intravascular coagulation, ocular build up of fibrin, and reocclusion or restenosis of recanahzed vessels, in a mammal.
• the invention also includes a method for reducing the thrombogenicity of a surface in a mammal by attaching to the surface, either covalently or noncovalently, a compound of the invention.
• R 1 , R2, and R4 are independently selected from hydrogen, aryl, -CO2R 5 , aryl Cl-4 alkyl, diary 1 Cl-4 aikyl, dicyclo C3-8 alkyl Cl-4 alkyl, cyclo C3-8 alkyl Cl-4 alkyl,
• R5 and R6 are independently hydrogen or Cl -4 alkyl, substituted aryl with one or two substituents selected from Cl-4 alkyl, Ci -4 alkoxy,
• R wherein R5 and R6 are independently hydrogen or Cl-4 alkyl, aryloxy, cyclo C3-8 alkoxy, methylenedioxy, halogen, or hydroxy, heteroaryl with one or two heteroatoms selected from N,
• R3 is hydrogen
• R ⁇ is hydrogen or Cl-4 alkyl
• A is selected from one of the following fragments
• J is (CH2)m, (CH2)mNH, or S02, where m is 1 or 2;
• R 1 and R ⁇ are independently selected from hydrogen, aryl, or cyclo C3-7 alkyl unsubstituted or substituted with one or more of Cl-4 alkyl, Cl-4 alkoxy, benzyl, cyclohexylmethyl or aryl;
• R3 is hydrogen, C l -4 alkyl, or Cl-4 alkenyl
• A is selected from one of the following fragments
• R 1 and R ⁇ are independently selected from hydrogen, aryl, or cyclohexyl
• A is selected from one of the following fragments
• Designation BOC (Boc) t-butyloxycarbonyl HBT(HOBT or HOBt) 1 -hydroxybenzotriazole hydrate BBC reagent benzotriazolyloxy-bis(pyrrolidino)- carbonium hexafluorophosphate
• the compounds of the present invention may have chiral centers and occur as racemates, racemic mixtures and as individual diastereomers, or enantiomers with all isomeric forms being included in the present invention.
• alkyl is intended to include both branched- and straight-chain saturated aliphatic hydrocarbon groups having 1-8 carbon atoms (Me is methyl, Et is ethyl, Pr is propyl, Bu is butyl).
• Alkenyl is intended to include both branched- and straight-chain unsaturated aliphatic hydrocarbon groups having 1 -8 carbon atoms, e.g. ethenyl, propenyl, etc.
• Cycloalkyl includes cyclic saturated aliphatic hydrocarbon groups having 3-8 carbon atoms.
• Aryl means a 6-membered organic radical derived from an aromatic hydrocarbon by removal of one hydrogen atom.
• Heteroaryl means a 5- or 6- membered organic radical having 1 or 2 heteroatoms selected from N, O, and S.
• Alkoxy represents an alkyl group having 1-8 carbon atoms attached through an oxygen bridge.
• Halo as used herein, means fluoro, chloro, bromo and iodo.
• Counterrion is used to represent a small, single negatively-charged species, such as chloride, bromide, hydroxide, acetate, trifluroacetate, perchlorate, nitrate, benzoate, maleate, tartrate, hemitartrate, benzene sulfonate, and the like.
• heterocycle or heterocychc represents a stable 5- to 7-membered mono- or bicyclic or stable 7- to 10-membered bicyclic heterocychc ring system any ring of which may be saturated or unsaturated, and which consists of carbon atoms and from one to three heteroatoms selected from the group consisting of N, O and S, and wherein the nitrogen and sulfur heteroatoms may optionally be oxidized, and the nitrogen heteroatom may optionally be quaternized, and including any bicyclic group in which any of the above-defined heterocychc rings is fused to a benzene ring.
• the heterocychc ring may be attached at any heteroatom or carbon atom which results in the creation of a stable structure.
• heterocychc elements examples include piperidinyl, piperazinyl, 2-oxopiperazinyl, 2-oxopiperidinyl, 2-oxopyrrolodinyl, 2-oxoazepinyl, azepinyl, pyrrolyl, 4-piperidonyl, pyrrolidinyl, pyrazolyl, pyrazolidinyl, imidazolyl, imidazolinyl, imidazolidinyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, oxazolyl, oxazolidinyl, isoxazolyl, isoxazolidinyl, morpholinyl, thiazolyl, thiazolidinyl, isothiazolyl, quinuclidinyl, isothiazolidinyl, indolyl, quinolinyl, isoquinolinyl, benzimid
• the pharmaceutically-acceptable salts of the compounds of Formula I include the conventional non-toxic salts or the quaternary ammonium salts which are formed, e.g., from inorganic or organic acids or bases.
• acid addition salts include acetate, adipate, alginate, aspartate, benzoate, benzenesulfonate, bisulfate, butyrate, citrate, camphorate, camphorsulfonate, cyclopentanepropionate, digluconate, dodecylsulfate, ethanesulfonate, fumarate, glucoheptanoate, glycerophosphate, hemisulfate, heptanoate, hexanoate, hydrochloride, hydrobromide, hydroiodide, 2-hydroxyethanesulfonate, lactate, maleate, methanesulfonate, 2-naphthalenesulfonate, nicotinate, oxalate, pamoate, pectinate, persulfate, 3-phenylpropionate, picrate, pivalate, propionate, succinate, tartrate, thiocyanate, tos
• Base salts include ammonium salts, alkali metal salts such as sodium and potassium salts, alkaline earth metal salts such as calcium and magnesium salts, salts with organic bases such as dicyclohexylamine salts, N-methyl-D- glucamine, and salts with amino acids such as arginine, lysine, and so forth.
• the basic nitrogen-containing groups may be quaternized with such agents as lower alkyl halides, such as methyl, ethyl, propyl, and butyl chloride, bromides and iodides; dialkyl sulfates like dimethyl, diethyl, dibutyl and diamyl sulfates, long chain halides such as decyl, lauryl, myristyl and stearyl chlorides, bromides and iodides, aralkyl halides like benzyl and phenethyl bromides and others.
• lower alkyl halides such as methyl, ethyl, propyl, and butyl chloride, bromides and iodides
• dialkyl sulfates like dimethyl, diethyl, dibutyl and diamyl sulfates
• long chain halides such as decyl, lauryl, myristyl and stearyl
• Amide couplings used to form the compounds of this invention are typically performed by the carbodiimide method with reagents such as dicyclohexylcarbodiimide, or l-ethyl-3-(3- dimethylaminopropyl) carbodiimide.
• reagents such as dicyclohexylcarbodiimide, or l-ethyl-3-(3- dimethylaminopropyl) carbodiimide.
• Other methods of forming the amide or peptide bond include, but are not limited to the synthetic routes via an acid chloride, azide, mixed anhydride or activated ester.
• solution phase amide coupling are performed, but solid-phase synthesis by classical Merrifield techniques may be employed instead. The addition and removal of one or more protecting groups is also typical practice.
• a general method for synthesizing compounds found in tables 2 and 3 is outlined Scheme II.
• a benzoic acid such as II- 1 (obtained in standard fashion) is coupled to 4-amino-pyridine under standard amide bond coupling conditions.
• the resultant amide LI-2 is then reduced with lithium aluminum anhydride to afford the desired product II-3.
• a general method for synthesizing compounds found in table 2 is outlined Schemes II and HI.
• a benzoate ester such as EH-4 obtained in standard fashion
• an alkylating reagent such as bromomethyl cyclohexane
• the ester is hydrolyzed with an aqueous base and is coupled to 4- aminopyridine under standard amide bond coupling conditions.
• the resultant amide III-7 is men reduced with lithium aluminum hydride to afford the desired product III-8.
• a method for preparing compounds found in table 4 is outlined in Scheme V.
• Substituted benzene compound such as 4- benzyloxy-benzene (V-1) is reacted with sulfuryl chloride at 80-120°C to give a sulfonyl chloride.
• the sulfonyl chloride (V-2) is reacted with Boc-piperazine and the Boc protecting group is removed with a strong acid to afford the deprotected piperazine.
• the free nitrogen is converted to the amidine with a guanylating reagent such as amidinosulfonic acid.
• a general method for synthesizing compounds found in table 5 is outlined in Scheme VI.
• the ketone of a cyano-benzophenone such as 1 is reduced with a metal hydride reagent such as sodium borohydride and the resultant alcohol is removed by treatment with dimethyldichlorosilane to afford the diphenylmethane VI-3.
• the methoxy group is removed with borontribromide and the phenol is alkylated with an alkylating reagent such as benzyl bromide.
• the cyano group is then treated with sodium hexamethyldisilazane and the silylimidate is hydrolyzed with an acidic workup to afford the final product.
• Step A Preparation of ethyl 4-( 1 , 1 -diphenylmethoxy)benzoate
• Step B Preparation of 4— (1,1 -dipheny lmethoxy)benzy 1 alcohol
• Step C Preparation of 4-( 1 , 1 -diphenylmethoxy)benzyl bromide
• Step A Preparation of l .l-dicvclohexyl-2-hvdroxy ethane (5-2)
• Step B Preparation of ethyl 4-( 1 , 1 -dicyclohexy l)ethoxybenzoate
• Step D Preparation of 4-amino-l-[4-(2,2-diphenyl-ethoxy> benzyllpyridinium bromide (7-7)
• Step D Preparation of 4-amino- 1 -[4-(dicyclohexylmethoxy)- benzyllpyridinium bromide (8-7)
• Oxalyl chloride (3.3 g, 26 mmol) was added under N2 dropwise to a suspension of 10-1 (5.0 g, 22 mmol) in CH2CI2 (75 ml) with 4 drops of DMF. After 1 h the solution was concentrated to dryness and flushed once with CHCI3. The residue was dissolved in CHCI3 (60 ml) and added dropwise to a suspension of 4-AP (6.2 g, 66 mmol) in CHCI3 (100 ml). After 1 h at room temperature the solution was poured into saturated Na2C ⁇ 3 and separated. The aqueous was further extracted with EtOAc (3x). The combined extracts were dried, filtered and concentrated to dryness. The residue was chromatographed on a Still column (80 mm) and the product eluted with 10% CH3OH- CHCI3 to yield 10-2.
• Step A Preparation of l -phenyl-2-methyl-l-propanol (13-2)
• Isobutyrophenone 13-1 (29.6 g, 0.20 mmol) was dissolved in ethanol (300 ml) and was reduced under N2 with sodium borohydride (7.57 g, 0.20 mmol) for 4 hrs. at room temperature. The ethanol was removed in vacuo and the residue was taken up in ethyl acetate (200 ml) and water (100 ml). The ethyl acetate extract was washed with water, dried, filtered and concentrated in vacuo to obtain alcohol 13-2.
• Step B Preparation of ethyl 4-(2-methyl-l-phenyl- propoxy)benzoate (13-5)
• Step D Preparation of 4-(2-methyl-l-phenylpropoxy)benzoyl chloride (13-7)
• StepJE Preparation of 4-(2-methyI-l-phenyl ⁇ ropoxy)-N-(4- pyridyDbenzamide (13-9)
• Step F Preparation of 4-[4-(2-methyl-l -phenylpropoxy)- benzylaminolpyridine (13-10)
• Step A Preparation of ethyl 4-(2.2-diphenylethoxy)benzoate (14-3)
• Step C Preparation of 4-(2,2-diphenylethoxy)-N-(4-pyridyl)benz- amide (14-6)
• Step D Preparation of 4-[4-(2,2-diphenylethoxy)benzyl- aminolpyridine (14-7)
• This amide was prepared from 15-5 (0.53 g, 2 mmol) and 4-aminopyridine (15-6) (0.188 g, 2 mmol) as in Example 13.
• the solid obtained, 15-7. melted at 123-125°C. iH NMR (d6-DMSO) ⁇ 0.88-1.03 (2H, m), 1.05-1.3 (3H, m), 1.4-1.56 (IH, m), 1.56-1.8 (7H, m), 4.1 (2H, t), 7.08 (2H, d), 7.78 (2H, d), 7.95 (2H, d), 8.45 (2H, d), 10.42 (IH, s).
• Step D Preparation of 4-(4-dicyclohexylmethoxy)-N-(4- pyridvDbenzamide (16-7)
• Step A Preparation of 1.3-diphenyl-2-propanol (17-2)
• Step B Preparation of ethyl 4-(l ,3-diphenyI-2-propoxy)benzoate
• Step E Preparation of 4-(l ,3-diphenyl-2-propoxy)-N-(4- pyridyPbenzamide (17-8)
• 4-Aminopyridine 17-7 (0.471 g, 5 mmol) was acylated with 7-6 (1.75 g, 5 mmol) using the conditions of Example 13.
• the amide 7-8 was obtained as a solid foam.
• Step F Preparation of 4-[4-(l,3-diphenyI-2-propoxy)-benzyl- aminolpyridine (17-9)
• Step A Preparation of ethyl 4-(3,4-methylenedioxybenzyl- oxy)benzoate (1 -3)
• Step B Preparation of ethyl 4-(3,4-methylenedioxybenzyl- oxy)benzoic acid (18-4)
• Step C Preparation of 4-(3,4-methylenedioxybenzyloxy)-N-(4- pyridyDbenzamide (18-6)
• Step D Preparation of 4-[4-(3,4-methylenedioxybenzyl- oxy)benzylamino1pyridine (18-7)
• Benzyl bromide (0.216 mL, 1.81 mmol, 1.2 equiv) was added to a suspension of 20-2 (400 mg, 1.51 mmol, 1 equiv) and cesium carbonate (1.72 g, 5.30 mmol, 3.5 equiv) in N, N-dimethylformamide (15 mL) at 23°C.
• the reaction mixture was heated to 70°C and was stirred at that temperature for 2h.
• the solution was cooled to 23°C and was concentrated.
• the residue was diluted with ethyl acetate (60 mL), and the resulting solution was washed with an aqueous saturated ammonium chloride solution (2 x 30 mL).
• Oxalyl chloride (0.391 mL, 4.49 mmol, 3 equiv) was added to a solution of 20-4 (509 mg, 1.49 mmol, 1 equiv) in dichloromethane (6 mL) at 23°C. Once gas evolution ceased (approximately 5 min after the addition of oxalyl chloride), the volatiles were removed in vacuo.
• a solution of lithium aluminum hydride in tetrahydrofuran (1.0 M, 4.12 mL, 4.12 mmol, 4 equiv) was added to a solution- of 20-5 (430 mg, 1.03 mmol, 1 equiv) in tetrahydrofuran (3 mL) at 0°C.
• the reaction mixture was heated to 50°C and held at that temperature for 2 h.
• the mixture was cooled to 0°C, and excess lithium aluminum hydride was quenched by the consecutive addition of water (0.155 mL), aqueous 15% sodium hydroxide solution (0.155 mL), and water (0.467 mL).
• the resulting aluminum salts were removed by filtration.
• StepJD Preparation of N-(4-pyridyl)-3-amino-4-(cyclohexyI- methyloxy)benzamide (21-5)
• Step E Preparation of 4- ⁇ [3-amino-4-(cyclohexylmethyl- oxy)phenv ⁇ methylamino)pyridine dihydrochloride (21 -6)
• Step F Preparation of 4- [ [3-emylammo-4-(cyclohexylmethyl- oxy)phenyllmethylaminolpyridine dihvdrochloride (21 -7c)
• Step 1 To a mixture of V-(4-pyridyl)-3-amino-4-(cyclohexyl- methyloxy)benzamide (21 -7a) (0.065 g, 0.20 mmol) in methylene chloride (1 ml) under nitrogen cooled in ice-bath was added acetic anhydride (0.040 ml, 0.42 mmol). The resulting mixture was stirred with ice-bath cooling for 2 h.
• Step 2 Employing the procedure substantially as described for the preparation of 21-6. but starting with 21 -7b (0.055g, 0.15 mmol), 21 -7c was obtained as a white solid, mp: 137-145°C.
• dH(DMSO-d6) 9.16 (IH, bs), 8.22 (IH, m), 8.13 (IH, m), 6.95-7.15 (3H, m), 6.97 (IH, d, 77 Hz), 6.87 (IH, d, 7 7 Hz), 4.45 (2H, d, 7 5 Hz), 3.83 (2H, d, 7 5 Hz), 3.4-3.8 (2H, br s), 3.18 (2H, q, 77 Hz), 1.60- 1.90
• Step G 4- ⁇ [3-(phenylmethylsulfonamido)-4-(cyclohexylmethy 1- oxy)phenvnmethylamino)pyridine dihvdrochloride (21 -7e) Step 1: To a mixture of 21 -7a (0.065 g, 0.20 mmol) and pyridine
• Step 2 Employing the procedure substantially as described for the preparation of 21-6. but starting with 21-7d (0.077 g, 0.16 mmol), 2 ⁇ 7e, was obtained as a white solid, mp: 135-140°C.
• dH(DMSO-d6) 9.07 (IH, bs), 8.79 (IH, bs), 8.17 (2H, d, 7 6 Hz), 7.26- 7.35 (5H, m), 7.19 (IH, d, 7 2 Hz),7.12 (IH, d, 7 8 Hz), 7.03 (IH, d, 7 8 Hz), 6.92 (2H, bs), 4.43 (4H, m), 3.80 (2H, d, 7 6 Hz), 1.62-1.82 (6H, m), 1.12-1.30 (3H, m), 0.95-1.10 (2H, m). Analysis calculated for C26H31 N303S»HC1:
• Step F Preparation of iV-(4-pyridyl)-3-propyl-4-(cyclohexyl- methyloxy)benzamide (22-7)
• Step G Preparation of 4- ⁇ [3-propyl-4-(cyclohexylmethyl- oxy)phenyllmethylamino ) pyridine (22-8)
• Step F Preparation of V-(4-pyridyl)-3-ethyl-4-(cyclohexyl- methyloxy)benzamide (23-7)
• Step G Preparation of 4- ⁇ [3-ethyl-4-(cyclohexylmethyl- oxy)phenvnmethylamino Ipyridine (23-8)
• Step B Preparation of N-((4-benzyloxy)phenylsulfonyI)-N'-t- Butyloxycarbonylpiperazine (24-3) -
• Step C Preparation of N-((4-benzyloxy)phenylsuIfonyl)- piperazine (24-4)
• Step D Preparation of N-((4-benzyloxy)phenylsulfonyI)-N' aminomethyliminopiperazine (24-5)
• 25-1 was synthesized in the same manner as 24-5 by substituting 4-cyclohexylmethyloxy-3-ethylbenzene for 4- benzyloxybenzene in Step A, Example 24 .
• Step D Preparation of 4- ⁇ [4-(Phenylmethyloxy)phenyl]- methyllbenzonitrile (26-5)
• Step E Preparation of 4- ⁇ [4-(Phenylmethyloxy)phenyl]- methy 11 benzamidine hydrochloride (26-6)
• Step A Preparation of 4- ⁇ [4-(Cyclohexylmethyloxy)phenyl]- ethyUbenzonitrile (27-1)
• Step B Preparation of 4- ⁇ [4-(Cyclohexylmethyloxy)phenyl]- methvDbenzamidine hydrochloride (27-3)
• Step D Preparation of N-( 4-phenoxymethylbenzyl)amino- pyridine (28-6)
• Step B Preparation of ethyl 3-cyclohexylmethyloxy-phenylacetate (29-3)
• Step C Preparation of 3-cyclohexylmethyloxy-phenylacetic acid (29-4) '
• a solution of aqueous sodium hydroxide (IN, 14 mL, 14.0 mmol, 10 equiv) was added to a solution of ethyl 3-cyclohexyl- methyloxy-phenylacetate 29-3 (384 mg, 1.39 mmol, 1 equiv) in a mixture of t-butanol (8 mL) and water (4 mL) at 23 °C.
• the reaction mixture was heated at reflux for 2h.
• the solution was cooled to 23°C and was diluted with ethyl acetate (50 mL).
• Step D Preparation of N-4'-pyridyl-(3-cyclohexylmethyl- oxy)phenylacetamide (29-5)
• Oxalyl chloride (0.158 mL, 1.81 mmol, 3 equiv) and a catalytic amount of N, N-dimethylformamide (2 mL) were added consecutively to a solution of 29-4 (150 mg, 0.604 mmol, 1 equiv) in dichloromethane (2 mL) at 23°C. Once gas evolution ceased (approximately 2 min following the addition of the N, N- dimethylformamide), the volatiles were removed in vacuo.
• Step E Preparation of 4-(2-(3-cyclohexylmethyIoxy- phenvDethyDaminopyridine (29-6)
• Concentrations of stock solutions of Z-GPR-afc were determined from measurements of absorbance at 380 nm of the 7- amino-4-trifluoromethylcoumarin produced upon complete hydrolysis of an aliquot of the stock solution by thrombin.
• Activity assays were performed by diluting a stock solution of substrate at least tenfold to a final concentration 0.5 Km into a solution containing enzyme or enzyme equilibrated with inhibitor. Times required to achieve equilibration between enzyme and inhibitor were determined in control experiments. Initial velocities of product formation in the absence (Vo) or presence of inhibitor (Vi) were measured.
• the activities shown by this assay indicate that the compounds of the invention are therapeutically useful for treating various conditions in patients suffering from unstable angina, refractory angina, myocardial infarction, transient ischemic attacks, atrial fibrillation, thrombotic stroke, embolic stroke, deep vein thrombosis, disseminated intravascular coagulation, and reocclusion or restenosis of recanahzed vessels.
• Anticoagulant therapy is indicated for the treatment and prevention of a variety of thrombotic conditions, particularly coronary artery and cerebrovascular disease. Those experienced in this field are readily aware of the circumstances requiring anticoagulant therapy.
• patient used herein is taken to mean mammals such as primates, including humans, sheep, horses, cattle, pigs, dogs, cats, rats, and mice.
• thrombin inhibition is useful not only in the anticoagulant therapy of individuals having thrombotic conditions, but is useful whenever inhibition of blood coagulation is required such as to prevent coagulation of stored whole blood and to prevent coagulation in other biological samples for testing or storage.
• thrombin inhibitors can be added to or contacted with any medium containing or suspected of containing thrombin and in which it is desired that blood coagulation be inhibited, e.g., when contacting the mammal's blood with material selected from the group consisting of vascular grafts, stents, orthopedic prothesis, cardiac prosthesis, and extracorporeal circulation systems
• the thrombin inhibitors of the invention can be administered in such oral forms as tablets, capsules (each of which includes sustained release or timed release formulations), pills, powders, granules, elixers, tinctures, suspensions, syrups, and emulsions. Likewise, they may be administered in intravenous (bolus or infusion), intraperitoneal, subcutaneous, or intramuscular form, all using forms well known to those of ordinary skill in the pharmaceutical arts. An effective but non-toxic amount of the compound desired can be employed as an anti -aggregation agent. For treating ocular build up of fibrin, the compounds may be administered intraocularly or topically as well as orally or parenterally.
• the thrombin inhibitors can be administered in the form of a depot injection or implant preparation which may be formulated in such a manner as to permit a sustained release of the active ingredient.
• the active ingredient can be compressed into pellets or small cylinders and implanted subcutaneously or intramuscularly as depot injections or implants.
• Implants may employ inert materials such as biodegradable polymers or synthetic silicones, for example, Silastic, silicone rubber or . other polymers manufactured by the Dow-Coming Corporation.
• the thrombin inhibitors can also be administered in the form of liposome delivery systems, such as small unilamellar vesicles, large unilamellar vesicles and multilamellar vesicles.
• Liposomes can be formed from a variety of phospholipids, such as cholesterol, stearylamine or phosphatidylcholines.
• the thrombin inhibitors may also be delivered by the use of monoclonal antibodies as individual carriers to which the compound molecules are coupled.
• the thrombin inhibitors may also be coupled with soluble polymers as targetable drug carriers.
• Such polymers can include polyvinlypyrrolidone, pyran copolymer, polyhydroxy-propyl- methacrylamide-phenol, polyhydroxyethyl-aspartamide-phenol, or polyethyleneoxide-polylysine substituted with palmitoyl residues.
• the thrombin inhibitors may be coupled to a class of biodegradable polymers useful in achieving controlled release of a dmg, for example, polylactic acid, polyglycolic acid, copolymers of polylactic and polyglycolic acid, polyepsilon caprolactone, polyhydroxy butyric acid, polyorthoesters, polyacetals, polydihydropyrans, polycyanoacrylates and cross linked or amphipathic block copolymers of hydrogels.
• biodegradable polymers useful in achieving controlled release of a dmg, for example, polylactic acid, polyglycolic acid, copolymers of polylactic and polyglycolic acid, polyepsilon caprolactone, polyhydroxy butyric acid, polyorthoesters, polyacetals, polydihydropyrans, polycyanoacrylates and cross linked or amphipathic block copolymers of hydrogels.
• the dosage regimen utilizing the thrombin inhibitors is selected in accordance with a variety of factors including type, species, age, weight, sex and medical condition of the patient; the severity of the condition to be treated; the route of administration; the renal and hepatic function of the patient; and the particular compound or salt thereof employed.
• An ordinarily skilled physician or veterinarian can readily determine and prescribe the effective amount of the dmg required to prevent, counter, or arrest the progress of the condition.
• Oral dosages of the thrombin inhibitors when used for the indicated effects, will range between about 0.1 mg per kg of body weight per day (mg/kg/day) to about 100 mg/kg/day and preferably 1.0- 100 mg/kg/day and most preferably 1-20 mg/kg/day. Intravenously, the most preferred doses will range from about 0.01 to about 10 mg/kg/minute during a constant rate infusion.
• the thrombin inhibitors may be administered in divided doses of two, three, or four times daily. Furthermore, they can be administered in intranasal form via topical use of suitable intranasal vehicles, or via transdermal routes, using those forms of transdermal skin patches well known to those of ordinary skill in that art.
• oral tablets can be prepared which contain an amount of active compound of between 100 and 500 mg, typically between 200 and 250 mg.
• a patient in need of thrombin inhibitor compound depending on weight and metabolism of the patient, would be administered between about 100 and 1000 mg active compound per day.
• two tablets containing 250 mg of active compound can be administered in the morning and two tablets containing 250 mg of active compound can again be administered in the evening.
• one tablet containing 250 mg of active compound can be administered in the morning and one tablet containing 250 mg of active compound can again be administered in the evening.
• thrombin inhibitors are typically administered as active ingredients in admixture with suitable pharmaceutical diluents, excipients or carriers (collectively referred to herein as "carrier” materials) suitably selected with respect to the intended form of administration, that is, oral tablets, capsules, elixers, symps and the like, and consistent with convention pharmaceutical practices.
• carrier suitable pharmaceutical diluents, excipients or carriers
• the active dmg component can be combined with an oral, non-toxic, pharmaceutically acceptable, inert carrier such as lactose, starch, sucrose, glucose, methyl cellulose, magnesium stearate, dicalcium phosphate, calcium sulfate, mannitol, sorbitol and the like; for oral administration in liquid form, the oral dmg components can be combined with any oral, non-toxic, pharmaceutically acceptable inert carrier such as ethanol, glycerol, water and the like. Moreover, when desired or necessary, suitable binders, lubricants, disintegrating agents and coloring agents can also be incorporated into the mixture.
• suitable binders, lubricants, disintegrating agents and coloring agents can also be incorporated into the mixture.
• Suitable binders include starch, gelatin, natural sugars such as glucose or beta- lactose, com-sweeteners, natural and synthetic gums such as acacia, tragacanth or sodium alginate, carboxymethylcellulose, polyethylene glycol, waxes and the like.
• Lubricants used in these dosage forms include sodium oleate, sodium stearate, magnesium stearate, sodium benzoate, sodium acetate, sodium chloride and the like.
• Disintegrators include, without limitation, starch methyl cellulose, agar, bentonite, xanthan gum and the like.
• the thrombin inhibitors can also be co-administered with suitable anti-coagulation agents or thrombolytic agents such as plasminogen activators or streptokinase to achieve synergistic effects in the treatment of various ascular pathologies.
• suitable anti-coagulation agents or thrombolytic agents such as plasminogen activators or streptokinase to achieve synergistic effects in the treatment of various ascular pathologies.
• thrombin inhibitors enhance the efficiency of tissue plasminogen activator- mediated thrombolytic reperfusion.
• Thrombin inhibitors may be administered first following thrombus formation, and tissue plasminogen activator or other plasminogen activator is administered thereafter. They may also be combined with heparin, aspirin, or warfarin.

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• 1997
  • 1997-09-09 JP JP10513809A patent/JP2001500864A/ja active Pending
  • 1997-09-09 CA CA002264037A patent/CA2264037A1/en not_active Abandoned
  • 1997-09-09 AU AU44117/97A patent/AU725403B2/en not_active Ceased
  • 1997-09-09 EP EP97942415A patent/EP0927035A4/de not_active Withdrawn
  • 1997-09-09 WO PCT/US1997/015989 patent/WO1998010763A1/en not_active Application Discontinuation

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