(4R)-6-ethynyl-1-methyl-6-prop-2-enoxy-4-prop-1-en-2-ylcyclohexene                                                                                                                                                              在
                                                                                                                                         [ruthenium(II)(η
6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]
2                                                                                                                                                                                                                               caesium carbonate   、                                                                                                  
1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazolium chloride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以66%的产率得到(R)-9-Isopropenyl-6-methyl-4-vinyl-1-oxa-spiro[4.5]deca-3,6-diene