Copper-catalyzed one-pot synthesis of 2-thioxo-2,3-dihydroquinazolin-4(1H)-ones from ortho-bromobenzamides and isothiocyanates
作者:Fei Wang、Peng Zhao、Chanjuan Xi
DOI:10.1016/j.tetlet.2010.11.010
日期:2011.1
Copper-catalyzed tandem reaction of ortho-bromobenzamides and isothiocyanates is described, which provides an efficient and practical route for the synthesis of 2-thioxo-2,3-dihydroquinazolin-4(1H)-ones. The optimal condition involved the following parameters: CuI as precatalyst, Cs2CO3 as base, N,N′-dimethylethane-1,2-diamine as ligand, and toluene as solvent, with reaction temperature at 120 °C.
描述了铜催化的邻溴苯甲酰胺和异硫氰酸酯的串联反应,这为合成2-thioxo-2,3-dihydroquinazolin-4(1 H)-ones提供了有效而实用的途径。最佳条件涉及以下参数:CuI为前催化剂,Cs 2 CO 3为碱,N,N'-二甲基乙烷-1,2-二胺为配体,甲苯为溶剂,反应温度为120°C。