在
sodium methylate 作用下,
以
四氢呋喃 、
甲醇 为溶剂,
反应 4.0h,
以76%的产率得到4-[(3S,5R,8R,9S,10S,13R,14S,17S)-14-hydroxy-10,13-dimethyl-3-[(3S,4R,5S)-3,4,5-trihydroxyoxan-2-yl]oxy-1,2,3,4,5,6,7,8,9,11,12,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]-2H-furan-5-one