Convenient construction of tetrahydrochromeno[4′,3′:2,3]indolizino[8,7-<i>b</i>]indoles and tetrahydroindolizino[8,7-<i>b</i>]indoles <i>via</i> one-pot domino reaction
作者:Jing Sun、Wang Jiang、Chao-Guo Yan
DOI:10.1039/c8ra05138k
日期:——
tetrahydrochromeno[4′,3′:2,3]indolizino[8,7-b]indoles were conveniently synthesized in high yields by one-pot domino reaction of tryptamines, alkyl propiolates and 2-aryl-3-nitro-2H-chromenes. Under similar conditions, the one-pot reaction of tryptamines, alkyl propiolates and β-nitroalkenes resulted in functionalized tetrahydroindolizino[8,7-b]indoles. The reaction mechanism involved sequential generation
通过色胺、丙炔酸烷基酯和2-芳基-3-硝基-2的一锅多米诺反应,方便、高产率地合成了功能化四氢苯并[4',3':2,3]吲嗪基[8,7- b ]吲哚H-色烯。在相似的条件下,色胺、丙炔酸烷基酯和β-硝基烯烃的一锅反应生成了功能化的四氢吲哚并[8,7- b ]吲哚。反应机理包括β-烯胺酯的连续生成、Michael加成、Pictet-Spengler反应和成环过程。该反应表现出较高的原子经济性并达到了可持续化学的目标。