(3aR,5aR,5bR,7aR,9S,11aR,11bR,13aS)-3a-(chlorocarbonyl)-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 、
(R)-1,3'-bipyrrolidine dihydrochloride 在
三乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 16.0h,
以68%的产率得到(3aR,5aR,5bR,7aR,9S,11aR,11bR,13aS)-3a-((R)-[1,3'-bipyrrolidine]-1'-carbonyl)-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