(2R,8S,9S,10R,13S,14S,17S)-methyl 2-[4-(tert-butyl)benzyl]-17-(4-hydroxybenzoyl)-10,13-dimethyl-2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthrene-3-carboxylate 在
potassium hydroxide 作用下,
以
甲醇 、
水 为溶剂,
反应 4.0h,
以50%的产率得到(2R,8S,9S,10R,13S,14S,17S)-2-[4-(tert-butyl)benzyl]-17-(4-hydroxybenzoyl)-10,13-dimethyl-2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthrene-3-carboxylic acid