The methylenecyclopropanes 1 react with LiCl, LiBr or NaI at 80 °C to give the corresponding gem-disubstituted homoallylic halides 2 in good to excellent yields in acetic acid. In some cases, the ring-opening reaction can be completed within 5 min to give the corresponding gem-disubstituted homoallylic halides in high yields.
的亚甲基环1用LiCl,LiBr的或
碘化钠在80℃下反应以得到相应的宝石二取代的高烯丙基卤化物2以良好至在
乙酸优异的产率。在某些情况下,开环反应可以在5分钟内完成,从而以高收率得到相应的宝石-二取代的均烯丙基卤化物。