Twofold C−H Functionalization: Palladium-Catalyzed Ortho Arylation of Anilides
摘要:
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.
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.
Amide-assisted radical strategy: metal-free direct fluorination of arenes in aqueous media
作者:Deqiang Liang、Yanni Li、Shulin Gao、Renlun Li、Xiangguang Li、Baoling Wang、Hai Yang
DOI:10.1039/c7gc00356k
日期:——
A metal- and initiator-free direct fluorination of arenes with the assistance of an amide group is developed. This reaction proceeded under simple aqueous conditions with good functional group tolerance and ortho–para selectivity, and is highly practical because it could be readily scaled up to a multigram-scale. At this stage, an exclusive mechanism could not be proposed, and several possibilities