tert-butyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bS)-3a-(2-(dimethylamino)ethylcarbamoyl)-1-(3-(dimethylamino)prop-1-en-2-yl)-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 、
三氟乙酸 在
氮 、 expected product 、
4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bS)-3a-(2-(dimethylamino)ethylcarbamoyl)-1-(3-(dimethylamino)prop-1-en-2-yl)-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 作用下,
以
二氯甲烷 为溶剂,
反应 15.0h,
以The expected product, 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bS)-3a-(2-(dimethylamino)ethylcarbamoyl)-1-(3-(dimethylamino)prop-1-en-2-yl)-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 (24.8 mg, 0.037 mmol, 48.6% yield), was isolated as a white solid的产率得到4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bS)-3a-(2-(dimethylamino)ethylcarbamoyl)-1-(3-(dimethylamino)prop-1-en-2-yl)-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