The invention relates to a process for preparing a compound of general formula (Ia): wherein R2, Y, R4 and R5 are as defined herein, wherein the epoxidation is conducted using an oxidant and methyltrioxorhenium as a catalyst (MeReO3). The invention also relates to certain compounds per se. The compounds are intermediates in the synthesis of synthetic bile acids.
本发明涉及一种制备通式(Ia)化合物的工艺:其中 R2、Y、R4 和 R5 如本文所定义,环氧化反应使用氧化剂和甲基三
氧化铼作为催化剂(MeReO3)。本发明还涉及某些化合物本身。这些化合物是合成
胆汁酸的中间体。