Copper(I)-Catalyzed Direct Arylation of 1,4-Disubstituted 1,2,3-Triazoles with Aryl Iodides
摘要:
Treatment of 1,4-disubstituted 1,2,3-triazoles with aryl iodides in the presence of a catalytic amount of copper chloride and lithium tert-butoxide (stoichiometric) in DMF at 140 degrees C leads to arylation at the 5-position. Various combinations of substituted aryl iodides and 1,4-disubstituted 1,2,3-triazoles bearing functional groups were found to be compatible.
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.
Copper(I)-Catalyzed Direct Arylation of 1,4-Disubstituted 1,2,3-Triazoles with Aryl Iodides
作者:Shin-ichi Fukuzawa、Eiji Shimizu、Kenichi Ogata
DOI:10.3987/com-08-11546
日期:——
Treatment of 1,4-disubstituted 1,2,3-triazoles with aryl iodides in the presence of a catalytic amount of copper chloride and lithium tert-butoxide (stoichiometric) in DMF at 140 degrees C leads to arylation at the 5-position. Various combinations of substituted aryl iodides and 1,4-disubstituted 1,2,3-triazoles bearing functional groups were found to be compatible.