[(NHC)PdCl<sub>2</sub>(Aniline)] Complexes: Easily Synthesized, Highly Active Pd(II)–NHC Precatalysts for Cross-Coupling Reactions
作者:Qinqin Xia、Shicheng Shi、Pengcheng Gao、Roger Lalancette、Roman Szostak、Michal Szostak
DOI:10.1021/acs.joc.1c02183
日期:2021.11.5
the synthesis, characterization, and reactivity of [(NHC)PdCl2(aniline)] complexes. These well-defined, air- and moisture-stable catalysts are highly active in the Suzuki–Miyaura cross-coupling of amides by N–C(O) activation as well as in the Suzuki–Miyaura cross-coupling of esters, aryl chlorides, and Buchwald–Hartwig amination. Most crucially, this study introduces broadly available anilines as stabilizing
我们报告了[(NHC)PdCl 2 (苯胺)]配合物的合成、表征和反应性。这些结构明确、空气和湿气稳定的催化剂在通过 N-C(O) 活化的酰胺的 Suzuki-Miyaura 交叉偶联以及酯、芳基氯、和布赫瓦尔德-哈特维格胺化。最重要的是,这项研究引入了广泛使用的苯胺作为明确的 Pd(II)-NHC 催化剂的稳定配体。各种苯胺支架的可用性,包括结构和电子多样性,在微调 Pd-NHC 具有挑战性的交叉偶联方面具有巨大潜力。此类母体催化剂 [Pd(IPr)(AN)Cl 2 ] 已与 Millipore Sigma 合作实现商业化,为反应筛选和优化提供了广泛的途径。