isopropenyllithium 、
(3aR,5aR,6S,9bS)-3a-[[tert-butyl(diphenyl)silyl]oxymethyl]-6-[(4-methoxyphenyl)methoxy]-5a-methyl-2,3,4,5,6,7,8,9b-octahydrocyclopenta[a]naphthalen-1-one 以
乙醚 为溶剂,
以97%的产率得到(1R,3aR,5aR,6S,9bS)-3a-[[tert-butyl(diphenyl)silyl]oxymethyl]-6-[(4-methoxyphenyl)methoxy]-5a-methyl-1-prop-1-en-2-yl-2,3,4,5,6,7,8,9b-octahydrocyclopenta[a]naphthalen-1-ol