androst-5-ene-3β,17β,19-triol 3,19-diacetate-17-privalate 在
吡啶 、
chromium(VI) oxide 作用下,
以
二氯甲烷 为溶剂,
反应 24.0h,
以80%的产率得到2,2-Dimethyl-propionic acid (3S,8R,9S,10S,13S,14S,17S)-3-acetoxy-10-acetoxymethyl-13-methyl-7-oxo-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester