Toluene-4-sulfonic acid (2S,4aS,4bS,6aS,11aS,11bR,13aS)-7-cyano-10-(4-fluoro-phenyl)-4a,6a-dimethyl-8-oxo-2,3,4,4a,4b,5,6,6a,8,9,11,11a,11b,12,13,13a-hexadecahydro-1H-9-aza-indeno[2,1-a]phenanthren-2-yl ester 在
potassium tert-butylate 作用下,
以
二甲基亚砜 、
苯 为溶剂,
反应 5.0h,
生成
(4aS,4bS,6aS,11aS,11bR,13aS)-10-(4-Fluoro-phenyl)-4a,6a-dimethyl-8-oxo-4,4a,4b,5,6,6a,8,9,11,11a,11b,12,13,13a-tetradecahydro-3H-9-aza-indeno[2,1-a]phenanthrene-7-carbonitrile