palladium-catalyzed amidation of 4-chlorotoluene with benzamide in the presence of unsymmetrical bisphosphines was investigated. Isostructural [2.2]paracyclophane-derived bisphosphines bearing dicyclohexylphosphino and diarylphosphino moieties were investigated as ligands in the oxidative addition and reductive elimination by kinetic studies. The reductive elimination was accelerated when a bisphosphine ligand
研究了在不对称
双膦存在下
钯催化的 4-
氯甲苯与苯甲酰胺酰胺化的速率决定步骤。通过动力学研究,研究了具有
二环己基膦基和二芳基膦基的同构 [2.2] 对环芳衍生的
双膦作为氧化加成和还原消除中的
配体。当应用含有富电子膦基团和释放电子较少的膦基部分的双
膦配体时,还原消除会加速。除了还原消除之外,
金属转移对
钯催化的芳基卤化物的酰胺化影响最大。