methyl (5E)-5-[(1S,3aS,5R,6S,6aS)-5-[tert-butyl(dimethyl)silyl]oxy-6-cyano-1-[dimethyl(phenyl)silyl]-3,3a,4,5,6,6a-hexahydro-1H-pentalen-2-ylidene]pentanoate 在
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以97%的产率得到methyl 5-[(3aR,4S,5R,6aS)-5-[tert-butyl(dimethyl)silyl]oxy-4-cyano-1,3a,4,5,6,6a-hexahydropentalen-2-yl]pentanoate