(5aR,5bR,11aR)-9-Acetoxy-1-isopropenyl-5a,5b,8,8,11a-pentamethyl-2,3,4,5,5a,5b,6,7,7a,8,9,10,11,11a,11b,12,13,13a-octadecahydro-cyclopenta[a]chrysene-3a-carboxylic acid methyl ester 在
lithium 、
乙二胺 作用下,
反应 2.0h,
以0.1 g的产率得到(1S,5aR,5bR,7aR,9S,11aR,11bR,13aS)-1-Isopropyl-5a,5b,8,8,11a-pentamethyl-2,3,4,5,5a,5b,6,7,7a,8,9,10,11,11a,11b,12,13,13a-octadecahydro-1H-cyclopenta[a]chrysen-9-ol