Efficient PdCl2-catalyzed Suzuki reactions using simple dicationic imidazolium salts as ligands in aqueous DMF
作者:Qing Huang、Jiabin Qiu、Limei Li、Guohai Xu、Zhonggao Zhou
DOI:10.1007/s11243-014-9847-4
日期:2014.9
Three new palladium catalysts, prepared via reactions of PdCl2 with readily obtained and inexpensive dicationic imidazolium salts, have been developed for the Suzuki reaction. The pre-catalyst was formed in situ using the imidazolium ligand, base and Pd metal precursor in 1,4-dioxane. This palladium catalyst provides a convenient and general method for the synthesis of biaryls from aryl bromides, activated
通过 PdCl2 与容易获得且廉价的双阳离子咪唑鎓盐反应制备的三种新型钯催化剂已被开发用于 Suzuki 反应。使用咪唑鎓配体、碱和 Pd 金属前体在 1,4-二恶烷中原位形成预催化剂。这种钯催化剂提供了一种方便和通用的方法,用于在有氧条件下在含水 DMF 中从芳基溴化物、活化的芳基氯化物和含有吸电子取代基和给电子基团的芳基硼酸(19 个实例)合成联芳基化合物(所有 26 个实例)。图形摘要 三种由 PdCl2 制成的新型钯催化剂和容易获得的廉价双阳离子咪唑鎓盐已被开发用于 Suzuki 反应。