α-iodocycloenones in very good yield, by a Michael addition/cyclisation (Gabriel–Cromwell) process employing a slight excess of primary amine and Cs2CO3 as base at 95°C. Using chiral amines it was possible to prepare optically pure aziridines. The same method was also efficient for the synthesis of aziridines from acyclic α-halounsaturated compounds. 2-Oxoazabicycles reacted with several nucleophiles to afford
通过迈克尔加成/环化(Gabriel-Cromwell)工艺,在95℃下使用略有过量的
伯胺和Cs 2 CO 3作为碱,由α-
碘代环烯酮以很高的收率制备了
氮丙啶。使用手性胺可以制备光学纯的
氮丙啶。同样的方法对于由无环α-卤代饱和化合物合成
氮丙啶也是有效的。2-氧
氮杂双环与几种亲核试剂反应以优异的产率提供了α-杂原子取代的环状烯酮。