1,3,5-三(溴甲基)苯 、
deoxycholic acid 3,12-diacetate 、
cholic acid 3,7,12-triacetate 、
acetyllithocholic acid 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
甲苯 为溶剂,
反应 26.0h,
以54%的产率得到[3-[[(4R)-4-[(3R,5R,8R,9S,10S,12S,13R,14S,17R)-3,12-diacetyloxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoyl]oxymethyl]-5-[[(4R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3,7,12-triacetyloxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoyl]oxymethyl]phenyl]methyl (4R)-4-[(3R,5R,8R,9S,10S,13R,14S,17R)-3-acetyloxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoate