异氰酸苯酯 、 (4R)-N-(4-aminobutyl)-4-[(3R,10S,12S,13R,17R)-3,12-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanamide 以
甲醇 为溶剂,
反应 24.0h,
以95%的产率得到3α,12α-dihydroxy-5β-cholan-24-{N-[4-(3-phenylureido)butyl]}amide