INTERMEDIATES FOR PREPARATION OF AN INHIBITOR OF PHOSPHODIESTERASE TYPE 5
申请人:Galenicum Health, S.l.
公开号:EP2168967A1
公开(公告)日:2010-03-31
Boronic compounds of formula II and the process for their preparation, wherein Y1 and Y2 are selected from hydroxyl, (C1-C4)alcoxyl and phenoxyl optionally substituted with one or two radicals independently selected from (C1-C4)alkyl and (C1-C4)alcoxyl; or alternatively Y1 and Y2 together with the boron atom can form a cyclic system. Process for the preparation of Sildenafil by reaction of a intermediate of formula II with a intermediate of formula III, wherein X3 is a leaving group and R1 is selected from H and (C1-C4)alkyl.
式 II 的硼化合物及其制备方法,其中 Y1 和 Y2 选自羟基、(C1-C4)烷氧基和苯氧基,任选被一个或两个独立选自(C1-C4)烷基和(C1-C4)烷氧基的基取代;或者 Y1 和 Y2 与硼原子一起可形成环状体系。通过式 II 中间体与式 III 中间体反应制备西地那非的工艺,其中 X3 为离去基团,R1 选自 H 和 (C1-C4)烷基。