N-Heterocyclic carbene-catalysed intramolecular hydroacylation of N-allylimidazole-2-carboxaldehydes and N-allylbenzimidazole-2-carboxaldehydes is reported. These exo-selective hydroacylations of unactivated alkenes enable the synthesis of a variety of basic, polycyclic nitrogen heterocycles in good-to-excellent yields.
报道了N-杂环卡宾催化的N-烯基咪唑-2-甲醛和N-烯基苯并咪唑-2-甲醛的分子内羟酰化反应。这些对外部选择性的羟酰化反应使得未活化的烯烃能够以良好至优秀的产率合成各种基础的、多环的氮杂环化合物。