Copper-Catalyzed Decarboxylative Cycloaddition of Propiolic Acids, Azides, and Arylboronic Acids: Construction of Fully Substituted 1,2,3-Triazoles
作者:Xiang-Xiang Wang、Yangchun Xin、Yi Li、Wen-Jin Xia、Bin Zhou、Rui-Rong Ye、Ya-Min Li
DOI:10.1021/acs.joc.9b03285
日期:2020.3.6
A copper-catalyzed decarboxylative cycloaddition of propiolic acids, azides, and arylboronicacids is described. The present reaction provides an efficient and convenient method for the synthesis of various fully substituted 1,2,3-triazoles from readily available starting materials. A possible mechanism is proposed.
Alkynylboronates represent useful substrates for the direct synthesis of triazole boronic esters by their thermal cycloaddition with azides. A telescoped cycloaddition-cross-coupling protocol is reported and its employment in the synthesis of a small triazole array is disclosed. (C) 2009 Elsevier Ltd. All rights reserved.