(+)-[2S-(2R*,3R*,4S*5S*)]-5-methoxy-3-[(4-methoxyphenyl)methoxy]-2,4-dimethyl-6-heptenal 、
(2,2-dimethyl-6-methylene-6H-1,3-dioxin-4-yloxy)trimethylsilane 在
trifluoroborane diethyl ether 作用下,
以
二氯甲烷 为溶剂,
反应 0.75h,
以80%的产率得到(+)-6-{[2S-(2R*,3S*,4S*,5S*,6S*)]-2-hydroxy-4-[(4-methoxyphenyl)methoxy]-6-methoxy-3,5-dimethyloct-7-enyl}-2,2-dimethyl-4H-1,3-dioxin-4-one