Copper-Catalyzed Domino Synthesis of Benzo[4,5]imidazo[1,2-<i>a</i>]pyrimidin-4(10<i>H</i>)-ones using Cyanamide as a Building Block
作者:Zhenbang Lou、Xudong Wu、Haijun Yang、Changjin Zhu、Hua Fu
DOI:10.1002/adsc.201500577
日期:2015.12.14
An efficient and practical copper-catalyzed domino synthesis of benzo[4,5]imidazo[1,2-a]pyrimidin-4(10H)-ones has been developed. The protocol uses N-(2-halophenyl)-3-alkylpropiolamides and cyanamide as the starting materials, inexpensive copper(I) iodide and pipecolinic acid as the catalyst and ligand, and the corresponding products were obtained in moderate to good yields.
开发了一种高效实用的苯并[4,5]咪唑并[1,2 - a ]嘧啶-4(10 H)-酮的铜催化多米诺合成。该方案以N-(2-卤代苯基)-3-烷基丙酰胺和氰酰胺为起始原料,廉价的碘化铜(I)和哌啉酸为催化剂和配体,并以中等至良好的产率获得了相应的产物。