申请人:Warner-Lambert Company
公开号:US05489691A1
公开(公告)日:1996-02-06
An improved process for the preparation of trans-6-[2-(substituted-pyrrole-1-yl)alkyl]pyran-2-ones by a novel synthesis is described where .alpha.-metalated N,N-disubstituted acetamide is converted in seven operations to the desired products, and specifically, a process for preparing (2R-trans)-5-(4-fluorophenyl)-2-(1-methylethyl)-N,4-diphenyl-1-[2-(tetrahy dro-4-hydroxy-6-oxo-2H-pyran-2-yl)ethyl]-1H-pyrrole-3-carboxamide, as well as other valuable intermediates used in the processes and prodrugs which are bioconverted to hypolipidemic and hypocholesterolemic agents and pharmaceutical compositions of the same.
本文描述了一种改进的方法,通过一种新的合成方法制备转-6-[2-(取代吡咯-1-基)烷基]吡喃-2-酮,其中α-金属化的N,N-二取代乙酰胺经过七个步骤转化为所需的产物,具体地,一种制备(2R-转)-5-(4-氟苯基)-2-(1-甲基乙基)-N,4-二苯基-1-[2-(四氢-4-羟基-6-氧代-2H-吡喃-2-基)乙基]-1H-吡咯-3-羧酰胺,以及用于该过程和生物转化为降血脂和降胆固醇药剂的其他有价值的中间体和前药的方法和制药组合物。