(8R,9S,13S,14S)-13-methylspiro[1,2,4,6,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthrene-17,2'-1,3-dioxolane]-3-one 在
sodium methylate 作用下,
以
甲醇 为溶剂,
反应 4.0h,
以1.72 g的产率得到(8R,9S,10R,13S,14S)-13-methylspiro[1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthrene-17,2'-1,3-dioxolane]-3-one