methyl (8R,9S,10R,13S,14S,17S)-3,17-diacetyloxy-10,13-dimethyl-6,7,8,9,11,12,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthrene-2-carboxylate 在
间氯过氧苯甲酸 作用下,
以
二氯甲烷 为溶剂,
反应 15.0h,
以92%的产率得到(4α,5α,17β)-3,17-bis(acetyloxy)-4,5-epoxyandrost-2-ene-2-carboxylic acid methyl ester