The use of a dual palladium/organic photoredox catalytic system enables the directed arylation of arenes with aryldiazonium salts with a broad substrate scope at room temperature under mild reaction conditions. This study thus serves as not only an alternative route for the biaryl motifs but also a new example for the application of an organic photoredox catalyst.
A highly efficient Pd-catalyzed decarboxylative ortho-arylation of amides with aryl acylperoxides
作者:Dengke Li、Ning Xu、Yicheng Zhang、Lei Wang
DOI:10.1039/c4cc06457g
日期:——
A Pd-catalyzed decarboxylative ortho-arylation of amides with aryl acylperoxides was developed. Anilides afforded ortho-arylation products, and N-methoxyarylamides gave phenanthridinones.
AbstractAn efficient o‐arylation of pivalamides by aryl iodides via rhodium(III)‐catalyzed C–H activation is demonstrated for the first time. Further, the biaryl products can be converted effectively into biologically active phenanthridine and phenanthridinone derivative.magnified image
Twofold C−H Functionalization: Palladium-Catalyzed <i>Ortho</i> Arylation of Anilides
作者:Gordon Brasche、Jorge García-Fortanet,、Stephen L. Buchwald
DOI:10.1021/ol800619c
日期:2008.6.5
The ortho arylation of anilides to form biphenyls via a twofold C-H functionalization/C-C bond-forming process is described. The oxidative coupling takes place in the presence of 5-10 mol % of Pd(OAC)(2), 10-20 mol % of DMSO, and 4-11 equiv of the aryl substrate in TFA under an oxygen atmosphere. No metal-containing cocatalyst is required.