、 、
methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bS)-3a-((2-(1,1-dioxidothiomorpholino)ethyl)amino)-1-(1-((methoxycarbonyl)amino)ethyl)-5a,5b,8,8,11a-pentamethyl-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl)benzoate 、
methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bS)-3a-((2-(1,1-dioxidothiomorpholino)ethyl)amino)-5a,5b,8,8,11a-pentamethyl-1-(1-(2,2,2-trifluoroacetamido)ethyl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl)benzoate 、
单水氢氧化锂 、 在
crude mixture 、 title compounds 作用下,
以
四氢呋喃 、
甲醇 为溶剂,
反应 0.42h,
以4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bS)-3a-((2-(1,1-dioxidothiomorpholino)ethyl)amino)-1-(1-((methoxycarbonyl)amino)ethyl)-5a,5b,8,8,11a-pentamethyl-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl)benzoic acid: Isolated as a white powder TFA salt (0.0039 g, 21.9% yield)的产率得到4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bS)-3a-((2-(1,1-dioxidothiomorpholino)ethyl)amino)-1-(1-((methoxycarbonyl)amino)ethyl)-5a,5b,8,8,11a-pentamethyl-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl)benzoic acid