vinyl dichlorides and electron deficient amides as the starting material is described. In the absence of transition-metal catalyst, the reaction proceeds under mild reaction conditions in open air and thus rendering a convenient operation. This strategy is not only suitable for both terminal and internal ynamide synthesis but also amenable for large-scale preparation. Broad substrate scopes with respect
The synthesis of ynamides in water was achieved by a micellarcatalysis strategy using rosin‐based surfactant APGS‐550‐M, which can be easily prepared from natural abundant biomass.
An efficient method for copper-catalyzed cross-coupling of 1,1-dibromo-1-alkenes with sulfonamides has been achieved by a rosin-based surfactant-enabled micellar catalysis. A variety of ynamides can be prepared in water under micellar conditions. This method features broad substrate scope, good functional group tolerance, great recyclability, and green solvent.
Copper-catalyzed coupling of 1,2-dibromo-1-styrenes with sulfonamides for the preparation of ynamides
作者:Yuan Yang、Xiaoyun Zhang、Yun Liang
DOI:10.1016/j.tetlet.2012.09.092
日期:2012.11
Ynamides were prepared through an efficient copper-catalyzed coupling reaction. In the presence of copper iodide, 1,10-phenanthroline, and Cs2CO3, the coupling reaction of 1,2-dibromo-1-styrenes with sulfonamides proceeded smoothly and generated the corresponding products with excellent isolated yields. (C) 2012 Elsevier Ltd. All rights reserved.