在
potassium carbonate 作用下,
以
甲醇 、
水 为溶剂,
反应 1.5h,
以82%的产率得到3-[(3S,5R,8R,9S,10S,13R,14S,17R)-3-[(2R,4S,5S,6S)-5-[(2S,4S,5S,6S)-5-[(2S,4S,5S,6S)-4,5-dihydroxy-6-methyloxan-2-yl]oxy-4-hydroxy-6-methyloxan-2-yl]oxy-4-hydroxy-6-methyloxan-2-yl]oxy-14-hydroxy-10,13-dimethyl-1,2,3,4,5,6,7,8,9,11,12,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]-2H-furan-5-one