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.
一种制备3β,7β,15α-三羟基-5-雄烯-17-酮及其3,15-二异
丙酸酯的方法,包括在酮的存在下或不使用溶剂的情况下,在稀酸的存在下使3β,7α,15α-三羟基-5-雄烯-17-酮发生外消旋反应,并在有机碱的作用下进行后处理,然后可以选择性地用季
戊酸的反应性衍
生物酯化所得的3β和15α位置上的3β,7β,15α-三醇。