2,3-丁二烯酸乙酯 、
7-(1-[(1,1-dimethylethyl)dimethylsilyloxy]ethenyl)-6,6,8-trimethyl-1,4-dioxaspiro-[4.5]dec-7-ene 在
对苯二酚 作用下,
反应 336.0h,
以26.5%的产率得到ethyl (4'aRS,5'SR)-1',1',4'a-trimethyl-6'-methylene-3',4',4'a,5',6',7'-hexahydro-8'-[(1,1-dimethylethyl)dimethylsilyloxy]-1'H-spiro[[1,3]-dioxolane-2-2'-naphthalene]-5'-carboxylate