triethyl(3-methylpent-4-en-2-yloxy)silane 、 ethyl 4-[(3aS,4S,7R,7aS)-7-allyl-7-hydroxytetrahydro-3aH-spiro[[1,3]dioxolo[4,5-c]pyran-2,1'-cyclohexan]-4-yl]-3-methylbut-2-enoate 在
RuCl2(1,3-dimesityl-imidazolidin-2-yl)(PCy3)(=CHPh) 作用下,
以
甲苯 为溶剂,
反应 6.0h,
以66%的产率得到ethyl (-)-(E)-4-{(3aS,4S,7R,7aS)-7-hydroxy-7-[(4R,5S,E)-4-methyl-5-(triethylsilyloxy)hex-2-enyl]tetrahydro-3aH-spiro[[1,3]dioxolo[4,5-c]pyran-2,1'-cyclohexan]-4-yl}-3-methylbut-2-enoate