5-(4-methoxyphenyl)-2,2-dimethyl-1,3-dioxane-4,6-dione 、
methyl 4-[4-(benzyloxy)but-1-yn-1-yl]benzoate 在
[ruthenium(II)(η
6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]
2 、 copper diacetate 、
potassium carbonate 作用下,
以
1,4-二氧六环 为溶剂,
反应 4.0h,
以59%的产率得到methyl 4-{3'-[2-(benzyloxy)ethyl]-5'-methoxy-6,6-dimethyl-2,4-dioxospiro[1,5-dioxane-3,1'-indene]-2'-yl}benzoate