Palladium-Catalyzed Carbonylation of Aryl Chlorides to Electrophilic Aroyl-DMAP Salts
作者:Pierre-Louis Lagueux-Tremblay、Alexander Fabrikant、Bruce A. Arndtsen
DOI:10.1021/acscatal.8b00757
日期:2018.6.1
4-dimethylaminopyridine (DMAP) to generate electrophilic aroyl-DMAP salts is described. In contrast to classical carbonylation reactions, which often require nucleophiles to react with weakly electrophilic palladium-acyl intermediates, the high electrophilicity of aroyl-DMAP salts allows the acylation of a broad range of substrates. This transformation is mediated by a palladium-Xantphos catalyst, and mechanistic
描述了钯催化的芳基氯化物和4-二甲基氨基吡啶(DMAP)的羰基化偶联,以生成亲电子的芳酰基-DMAP盐。与经典的羰基化反应不同,经典的羰基化反应通常需要亲核试剂与弱亲电的钯-酰基中间体反应,芳酰基-DMAP盐的高亲电性可将多种底物进行酰化。这种转变是由钯-黄磷催化剂介导的,并且机理研究表明,配体空间应变与Pd(0)稳定作用的结合,既可以还原性消除反应性ArCO-DMAP产物,也可以氧化加入强的芳基-氯键。全面的,