(3aR,5aR,5bR,7aR,9S,11aR,11bR,13aS)-3a-(5-(4-chlorophenyl)-1,3,4-oxadiazol-2-yl)-1-isopropyl-5a,5b,8,8,11a-pentamethyl-2-oxo-3,3a,4,5,5a,5b,6,7,7a,8,9,10,11,11a,11b,12,13,13a-octadecahydro-2H-cyclopenta[a]chrysen-9-yl acetate 在
4-二甲氨基吡啶 、
水 、
potassium carbonate 、 sodium hydroxide 作用下,
以
四氢呋喃 、
甲醇 、
甲苯 为溶剂,
反应 54.0h,
生成 (1R,3S)-3-((((3aR,5aR,5bR,7aR,9S,11aR,11bR,13aS)-3a-(5-(4-chlorophenyl)-1,3,4-oxadiazol-2-yl)-1-isopropyl-5a,5b,8,8,11a-pentamethyl-2-oxo-3,3a,4,5,5a,5b,6,7,7a,8,9,10,11,11a,11b,12,13,13a-octadecahydro-2H-cyclopenta[a]chrysen-9-yl)oxy)carbonyl)-2,2-dimethylcyclobutane-1-carboxylic acid