Benzoic acid (3S,5S,8R,9S,10S,13S,14S,17R)-17-acetoxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-yl ester 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
甲醇 、
二氯甲烷 为溶剂,
反应 24.0h,
以84%的产率得到(3S,5S,8R,9S,10S,13S,14S,17S)-17-hydroxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-3-yl benzoate