3 BETA,7 BETA,15 ALPHA-TRIHYDROXY-5-ANDROSTEN- 17-ONE AND 3,15-DIPIVALATE OF SAME AND THEIR MANUFACTURE

摘要

A process for the preparation of 3 beta ,7 beta ,15 alpha -trihydroxy-5-androsten-17-one and the 3,15-dipivalate thereof comprises epimerizing 3 beta ,7 alpha ,15 alpha -trihydroxy-5-androsten-17-one in the presence of a ketone with or without a solvent, with dilute mineral acid and subsequent treatment with an organic base, and optionally subsequently esterifying the 3 beta - and 15 alpha -positions of the resultant 3 beta ,7 beta ,15 alpha -triol with a reactive derivative of pivalic acid.