(8R,9S,10R,13S,14S)-3-ethoxy-10,13-dimethyl-16-methylidene-2,7,8,9,11,12,14,15-octahydro-1H-cyclopenta[a]phenanthren-17-one 在
吡啶 、 sodium carbonate 作用下,
以
1,4-二氧六环 、
水 为溶剂,
反应 72.0h,
生成 Acetic acid (8R,9S,10R,13S,14S)-16-acetoxymethyl-10,13-dimethyl-3,17-dioxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-16-ylmethyl ester