Copper-catalyzed annulation of α-substituted diazoacetates with 2-ethynylanilines: the direct synthesis of C2-functionalized indoles
作者:Gang Liu、Guangyang Xu、Jian Li、Dong Ding、Jiangtao Sun
DOI:10.1039/c3ob42350f
日期:——
Copper-catalyzed direct annulation of α-substituted diazoacetates with 2-ethynylanilines leading to C2-functionalized indoles was achieved under mild reaction conditions. The C2-(carboxylate methyl) substituted indoles were obtained in moderate to high yields. In addition, this procedure tolerates a series of N-substituted and free substituted 2-ethynylanilines.
在温和的反应条件下,铜催化的α-取代的重氮乙酸酯与2-乙炔基苯胺的直接环化反应,生成了C2官能化的吲哚。C2-(羧甲基)吲哚以中等至高收率获得。另外,该方法耐受一系列N-取代的和自由取代的2-乙炔基苯胺。