Acetic acid (3S,8S,9S,10R,13R,14S,17S)-10,13-dimethyl-17-octyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester 在
叔丁基过氧化氢 、 bismuth(III) chloride 作用下,
以
乙腈 为溶剂,
反应 22.0h,
以74%的产率得到Acetic acid (3S,8S,9S,10R,13R,14S,17S)-10,13-dimethyl-17-octyl-7-oxo-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester