6,6-二甲基-5-亚甲基-1,3-环戊二烯 、
Methyl 2-fluoro-2-cyclopropylideneacetate 以
异丙醚 为溶剂,
生成 Methyl exo-2'-fluoro-7'-isopropylidenespiro(cyclopropane-1,3'-bicyclo[2.2.1]hept-5'-ene)-2'-carboxylate 、 Methyl endo-2'-fluoro-7'-isopropylidenespiro(cyclopropane-1,3'-bicyclo[2.2.1]hept-5'-ene)-2'-carboxylate