((2S,4aS,4bS,7R,8aS,10aS)-7-tert-Butoxy-2,4b-dimethyl-tetradecahydro-phenanthren-2-yl)-acetic acid methyl ester 在
sodium hydroxide 作用下,
以
甲醇 为溶剂,
反应 96.0h,
以90%的产率得到((2S,4aS,4bS,7R,8aS,10aS)-7-tert-Butoxy-2,4b-dimethyl-tetradecahydro-phenanthren-2-yl)-acetic acid