| abstract |
The present invention relates to a compound of formula (Ia) wherein R 2 , Y, R 4 , and R 5 are as defined herein, wherein the epoxidation is carried out using methyltrioxorenium (MeReO3) as an oxidizing agent and catalyst. It is about the manufacturing process of. The invention also relates to certain compounds per se. The compound is an intermediate in the synthesis of synthetic bile acids. |