[EN] PROCESSES FOR THE MANUFACTURE OF THROMBIN INHIBITORS AND N-PYRIDIN-4-YL-OXAZOLIDIN-2-ONES AS INTERMEDIATE THEREFOR<br/>[FR] PROCEDES POUR PRODUIRE DES INHIBITEURS DE THROMBINE ET DES N-PYRIDIN-4-YL-OXAZOLIDIN-2-ONES SERVANT DE PRODUITS INTERMEDIAIRES POUR CETTE PRODUCTION
申请人:GLAXO GROUP LTD
公开号:WO2003006462A1
公开(公告)日:2003-01-23
A novel intermediate of formula (II) is provided for use in an improved process for the preparation of benzamide derivatives of formula (I) which are known to be thrombin inhibitors, wherein: R?1 and R2¿ independently represent a group (VII) or R?1 and R2¿ together form a C¿3-7?heterocycloalkyl or heterocycloalkenyl group which may be optionally substituted by C1-6alkyl, C1-4alkoxy, halogen, carboxylic acid or a C1-4carboxylic acid ester group; R?3¿ represents hydrogen, C¿1-3?alkyl, halogen, or C1-2alkoxy; R?4, R5 and R6¿ independently represent hydrogen, or halogen; R7 represents hydrogen or C¿1-6?alkyl; R?8¿ represents hydrogen, C¿3-8?cycloalkyl, C3-7cycloalkenyl, C3-7heterocycloalkyl, C3-7heterocycloalkenyl, aryl, or heteroaryl, which groups are optionally substituted by one or more groups selected from halogen, hydroxy, CN, Cl-6alkyl, Cl-6alkoxy, C1-6acyloxy, NR?9R10, NHCOR11¿, NHSO¿2?R?12, COR13, CO¿2R?14CONR15Rl6¿, and SO¿2NHR?17; X represents a bond, a C¿1-6?alkyl chain, or a C3-6alkenyl chain, where one or two nitrogen, oxygen, or sulfur atoms may be optionally contained within each chain, and the chains are optionally substituted by one or more groups selected from halogen, hydroxy, CN, C1-6alkyl, C1-6alkoxy, C1-6acyloxy, NR?9R10, NHCOR11¿, NHSO¿2?R?12, COR13, CO¿2R?14, CONR15R16¿ and SO¿2?NHR?17; R9-R17¿ represent hydrogen, C¿1-6?alkyl, or R?9 and R10 or R15 and R16¿ form a C¿3-7?heterocycloalkyl ring, or R?12¿ additionally may represent trifluoromethyl.