(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