[EN] A PROCESS FOR THE PREPARATION OF TRANS-(2R)-4-SUBSTITUTED-PIPECOLIC ACIDS AND ESTERS THEREOF, AND INTERMEDIATE COMPOUNDS USED THEREIN<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ACIDES (2R)-PIPÉCOLIQUES TRANS, SUBSTITUÉS EN POSITION 4, ET DE LEURS ESTERS, ET COMPOSÉS INTERMÉDIAIRES UTILISÉS À CET EFFET
申请人:ENANTIA S L
公开号:WO2011039290A1
公开(公告)日:2011-04-07
Process for the preparation of a compound of formula (III) wherein R1 is a (C1- C10)-alkyl radical or a radical of one of the known ring systems with 1 -3 rings, the rings being aromatic and being isolated or partially/totally fused and having 5-6 members, being each member independently selected from C, CH, N, NH, O, S; and the ring system being optionally substituted by one or more radicals independently selected from (C1-C6)-alkyl, (C1-C6)-alkoxy, and halogen; the process comprising: a) reacting a (C1-C10)-alkyl lithium, or a lithium salt of the ring system as defined above with a copper salt to obtain an organocuprate compound, and b) reacting the organocuprate compound obtained in step a) with di(tert-butyl) (2R)-3,6-dihydro-6-oxo-1,2(2H)- pyridinedicarboxylatejn an inert solvent system in the presence of a Lewis acid. Intermediate IV is new and is useful as an intermediate for the preparation of pharmaceutically active ingredients such as Argatroban.
制备式(III)化合物的过程,其中R1是(C1-C10)烷基或已知环系之一的基团,该环系具有1-3个环,环为芳香环且为隔离或部分/完全融合,其中每个环成员独立地选择自C,CH,N,NH,O,S,环系可由一个或多个基团独立地选择自(C1-C6)烷基,(C1-C6)烷氧基和卤素进行取代;该过程包括:a)反应(C1-C10)烷基锂或上述定义的环系的锂盐与铜盐反应以获得有机铜化合物,b)在惰性溶剂体系中,在路易斯酸的存在下,将步骤a)中获得的有机铜化合物与二(叔丁基)(2R)-3,6-二氢-6-氧代-1,2(2H)-吡啶二甲酸酯反应。中间体IV是新的,可用作制备药物活性成分,如阿加曲班的中间体。