allowed the structural characterization of palladium(II)fluoroacyl intermediates derived from C–N bond oxidative addition of an amide electrophile. They also revealed the high reactivity of these intermediates for transmetallation with boronic acids without exogenous base. The mechanisticstudies also provided a platform to design a practical catalytic protocol for the synthesis of a diversity of α,α-difluoroketones
[EN] METAL-CATALYZED COUPLING OF ARYL AND VINYL HALIDES WITH ALPHA, ALPHA-DIFLUOROCARBONYL COMPOUNDS<br/>[FR] COUPLAGE CATALYSÉ MÉTALLIQUE D'HALOGÉNURES D'ARYLE ET DE VINYLE AVEC DES COMPOSÉS ALPHA, ALPHA-DIFLUOROCARBONYLE
申请人:UNIV CALIFORNIA
公开号:WO2014165861A1
公开(公告)日:2014-10-09
The coupling of aryl, heteroaryl, and vinyl halides with α,α-difluoroketones or silyl ethers or siylenol ethers of α,α-difluoroketones and α,α-difluoroamides and esters are described. Further derivatization of the coupling products (such as ketone cleavage and Baeyer-Villiger oxidation) is also described.
Palladium catalyzed direct α-arylation of α,α-difluoroketones with aryl bromides
作者:Chen Guo、Ruo-Wen Wang、Feng-Ling Qing
DOI:10.1016/j.jfluchem.2012.05.001
日期:2012.11
The palladium-catalyzed direct alpha-arylations of alpha,alpha-difluoroketones with diverse aryl bromides have been developed by using rac-BINAP as ligand and Cs2CO3 as a mild base in xylene. This method provides an efficient and straightforward access to a variety of alpha-aryl-alpha,alpha-difluoroketones with broad substrate scope. (C) 2012 Elsevier B.V. All rights reserved.