Organic hydrogen phosphites and hydrogen phosphates catalyzed Friedel–Crafts amidoalkylation of indoles with aryl aldimines
作者:Bei-Lei Wang、Jin-Xin Zhang、Nai-Kai Li、Guo-Gui Liu、Qi Shen、Xing-Wang Wang
DOI:10.1016/j.tetlet.2011.07.010
日期:2011.9
A highly efficient and selective Friedel-Crafts amidoalkylation reaction of indoles with N-Ts aryl aldimines has been developed utilizing dimethyl hydrogen phosphite or diphenyl hydrogen phosphate as the organocatalysts, providing a facile and cost-effective process for synthesis of 3-indolyl methanamine derivatives in good to excellent yields. This transformation displays a broad substrate scope and wide functional-group tolerability, regardless of the electronic and steric properties of N-Ts aryl aldimines. Given that the developed catalytic Friedel-Crafts amidoalkylation reaction exhibits several salient features such as metal-free catalysis, high efficiency, low cost and mild reaction condition, this process might have practical applications in the synthesis of 3-indolyl methanamine derivatives. (C) 2011 Elsevier Ltd. All rights reserved.