The direct arylation of aryl iodides with 2-phenylpyridines and related substrates was carried out smoothly in the presence of 5 mol% RuCl3 using benzoyl peroxide as a promoter to generate biarylated products in high yields. The method is simple, efficient, and regioselective, and employs only commercially available reagents.
Ruthenium(<scp>ii</scp>)-catalyzed ortho-C–H arylation of diverse N-heterocycles with aryl silanes by exploiting solvent-controlled N-coordination
作者:Pradeep Nareddy、Frank Jordan、Michal Szostak
DOI:10.1039/c7ob00818j
日期:——
We report the first method for the direct, regioselectiveRu(II)-catalyzed oxidative arylation of C–H bonds in diverse N-heterocycles with aryl silanes by exploiting solvent-controlled N-coordination. The reaction takes advantage of the attractive features of organosilanes as coupling partners, providing proof of concept for N-directed Ru(II)-catalyzed C–H arylation. This novel, operationally-simple
Catalytic amounts of economically attractive [RuCl3(H2O)(n)] allow for direct arylations via C-H bond functionalization with aryl bromides under phosphine ligand-free reaction conditions. Thereby, a variety of functionalized (hetero)aryl bromides, bearing either electron-withdrawing or electron-releasing substituents, can be employed for direct arylations of pyridine, oxazoline, pyrazole, or ketimine derivatives as pronucleophiles. (C) 2008 Elsevier Ltd. All rights reserved.
Rhodium-Catalyzed Oxidative C−H Arylation of 2-Arylpyridine Derivatives via Decarbonylation of Aromatic Aldehydes
作者:Qi Shuai、Luo Yang、Xiangyu Guo、Olivier Baslé、Chao-Jun Li
DOI:10.1021/ja105396b
日期:2010.9.8
A new concept for aryl aryl coupling that involves oxidative decarbonylative coupling of aryl C-H bonds and readily available aldehydes has been developed, achieving the aryl-aryl union with complete control of reaction sites.