2α-cyano-3α,16α-diacetoxy-4α,5α-epoxyandrostan-17-one 在
sodium tetrahydroborate 作用下,
以
甲醇 为溶剂,
反应 0.75h,
以23 mg的产率得到Acetic acid (2S,3R,4R,5S,8S,9S,10R,13S,14S,16R,17R)-16-acetoxy-2-cyano-17-hydroxy-10,13-dimethyl-hexadecahydro-20-oxa-cyclopropa[4,5]cyclopenta[a]phenanthren-3-yl ester