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