2,2-二甲基琥珀酸酐 、
1-[(3aS,5aR,5bR,7aR,9S,11aR,11bR,13aS)-9-hydroxy-5a,5b,8,8,11a-pentamethyl-1-propan-2-yl-2,3,4,5,6,7,7a,9,10,11,11b,12,13,13a-tetradecahydrocyclopenta[a]chrysen-3a-yl]-2-(4-methylpiperazin-1-yl)ethanone 在
吡啶 、
4-二甲氨基吡啶 作用下,
反应 1.5h,
以18.74%的产率得到4-((3aS,5aR,5bR,7aR,9S,11aR,11bR,13aS)-1-isopropyl-5a,5b,8,8,11a-pentamethyl-3a-(2-(4-methylpiperazin-1-yl)acetyl)-3,3a,4,5,5a,5b,6,7,7a,8,9,10,11,11a,11b,12,13,13a-octadecahydro-2H-cyclopenta[a]chrysen-9-yloxy)-2,2-dimethyl-4-oxobutanoic acid