n-4-yl)pyridines undergo C–H activation at the phenyl ring in the ortho position to the amine nitrogen atom when reacted with (PhCN)2PdCl2 and finally form N,N,C-coordinated palladium(II) complexes in high yields. Five differently substituted complexes were synthesized and characterized by spectroscopy and X-ray structure analysis. The reaction mechanism for the formation of these complexes was elucidated
2-(2-Phenylaminopyrimidin-4-yl) 吡啶与 (PhCN)2PdCl2 反应时,在苯环胺氮原子邻位发生 C-H 活化,最终形成 N,N,C 配位钯 (II) ) 高产率的配合物。合成了五种不同取代的配合物,并通过光谱学和 X 射线结构分析对其进行了表征。通过动力学实验阐明了形成这些配合物的反应机理,从而可以计算出配合物形成的活化参数。
Bimetallic Cu/Pd Catalysts with Bridging Aminopyrimidinyl Phosphines for Decarboxylative Cross-Coupling Reactions at Moderate Temperature
作者:Dagmar Hackenberger、Bingrui Song、Matthias F. Grünberg、Saeid Farsadpour、Fabian Menges、Harald Kelm、Cedric Groß、Timm Wolff、Gereon Niedner-Schatteburg、Werner R. Thiel、Lukas J. Gooßen
DOI:10.1002/cctc.201500769
日期:2015.11
catalyst system is presented that enables the decarboxylative cross‐coupling of triflates with carboxylate salts at only 100 °C, which is 70 °C lower than with previous Cu/Pd‐based systems. The new protocol allows the coupling of a broad range of aryl triflates with various substituted 2‐nitrobenzoates in good to excellent yields. The key feature of the catalyst system is a bidentate P,N‐ligand designed