Peroxide-Free Pd(II)-Catalyzed Ortho Aroylation and Ortho Halogenation of Directing Arenes
作者:Sourav Kumar Santra、Arghya Banerjee、Prakash Ranjan Mohanta、Bhisma K. Patel
DOI:10.1021/acs.joc.6b01170
日期:2016.7.15
A Pd(II)-catalyzed peroxide-free ortho aroylation of directing arenes has been developed via cross dehydrogenative coupling (CDC) in the presence of the terminal oxidant Cu(OAc)2·H2O. Ortho aroylation of directing arenes proceeds via decarbonylation of the in situ generated phenyl glyoxal, which is obtained from 2-acetoxyacetophenone in the presence of the oxidant Cu(OAc)2·H2O. However, changing the
Palladium-Catalyzed<i>ortho</i>-Aroylation of 2-Arylbenzothiazoles and 2-Arylbenzoxazoles with Aldehydes
作者:Arghya Banerjee、Sourav Kumar Santra、Srimanta Guin、Saroj Kumar Rout、Bhisma K. Patel
DOI:10.1002/ejoc.201201503
日期:2013.3
protocol for the ortho-aroylation of 2-arylbenzothiazoles and 2-arylbenzoxazoles has been developed using aldehydes as the aroyl source. This Pd-catalyzed substrate-directed sp2-hybridized C–H bond functionalization occurs in the presence of the oxidant tert-butyl hydroperoxide. A variety of functional groups on the 2-arylbenzothiazoles, 2-arylbenzoxazoles, and aldehydes are tolerated under the reaction