(methoxy)triphenylphosphonium chloride 、 (3aS,5aR,5bR,7aR,9S,11aR,11bR,13aS)-3a-formyl-1-isopropyl-5a,5b,8,8,11a-pentamethyl-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 在
正丁基锂 作用下,
以
四氢呋喃 、
正己烷 为溶剂,
反应 0.75h,
以34%的产率得到[(3aR,5aR,5bR,7aR,9S,11aR,11bR,13aS)-3a-(2-methoxyethenyl)-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-9-yl] acetate