(1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-3a-(chlorocarbonyl)-5a,5b,8,8,11a-pentamethyl-1-(1-methylcyclopropyl)icosahydro-1H-cyclopenta[a]chrysen-9-yl acetate 、
4-(2-(2-methoxyethoxy)ethoxy)piperidine hydrochloride 在
三乙胺 作用下,
以
二氯甲烷 为溶剂,
以77.5%的产率得到(1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-3a-(4-(2-(2-methoxyethoxy)ethoxy)piperidin-1-carbonyl)-5a,5b,8,8,11a-pentamethyl-1-(1-methylcyclopropyl)icosahydro-1H-cyclopenta[a]chrysen-9-yl acetate