2,2-二甲基琥珀酸酐 、
((1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR)-9-hydroxy-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)icosahydro-3aH-cyclopenta[a]chrysen-3a-yl)((S)-2-(5 (thiophen-2-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)methanone 在
4-二甲氨基吡啶 作用下,
以
甲苯 为溶剂,
反应 24.0h,
以0.1 g的产率得到2,2-dimethyl-4-oxo-4-(((1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-3a-((S)-2-(5-(thiophen-2-yl)-1H-imidazol-2-yl)pyrrolidine-1-carbonyl)icosahydro-1H-cyclopenta[a]chrysen-9-yl)oxy)butanoic acid