Ethyl cyclopropylidene acetate and analoges are prepared in good yield by an acid catalyzed Wittig reaction. They are used as equivalents of senecioic acid esters in the aprotic double Michael reaction to give spirocyclopropyl substituted bicyclo[2.2.2] octanes.
通过酸催化的Wittig反应以高收率制备乙基环亚
丙基乙酸酯和类似物。它们在非质子双迈克尔反应中用作千里香酸酯的等价物,得到螺环丙基取代的
双环[2.2.2]辛烷。