methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bS)-3a-((2-(1,1-dioxidothiomorpholino)ethyl)amino)-1-((R)-1-hydroxyethyl)-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)-1-(1-acetoxy-2-hydroxypropan-2-yl)-3a-((2-(1,1-dioxidothiomorpholino)ethyl)amino)-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 、
二乙胺基三氟化硫 、
三氟乙酸 在
Acetone cardice 、
氮气 、
四氢呋喃 、
甲醇 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以The product was thus isolated as a white solid (0.0139 g, 43% yield) TFA salt的产率得到methyl 4-((3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bS)-3a-((2-(1,1-dioxidothiomorpholino)ethyl)amino)-1-ethylidene-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