Palladium-Catalyzed Suzuki–Miyaura Cross-Coupling Using Phosphinous Acids and Dialkyl(chloro)phosphane Ligands
作者:Christian Wolf、Kekeli Ekoue-Kovi
DOI:10.1002/ejoc.200500843
日期:2006.4
The use of eleven palladium complexes having monomeric and μ-chloro-bridged dimeric structures and either bulky dialkyl- and diarylphosphinous acid ligands (POPd, POPd-Br, POPd1, POPd2, POPd6, POPd7, Ph1-Phoxide) or dialkyl(chloro)phosphane ligands (PXPd, PXPd2, PXPd6, PXPd7) for Suzuki–Miyaura coupling reactions has been evaluated. Screening and optimization of catalyst loading, solvent, temperature
使用具有单体和 μ-氯桥接二聚体结构以及庞大的二烷基和二芳基次膦酸配体(POPd、POPd-Br、POPd1、POPd2、POPd6、POPd7、Ph1-Phoxide)或二烷基(氯)膦的十一种钯配合物Suzuki-Miyaura 偶联反应的配体(PXPd、PXPd2、PXPd6、PXPd7)已被评估。催化剂负载量、溶剂、温度和碱的筛选和优化表明,在 2.5 mol% 的钯-次膦酸 POPd 存在下,使用缺电子和富电子的芳基碘化物、溴化物和氯化物可以获得优异的结果, (tBu2POH)2PdCl2,在 1,4-二恶烷中,使用碳酸铯作为碱。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)