Pd-Catalyzed α-Arylation of α,α-Difluoroketones with Aryl Bromides and Chlorides. A Route to Difluoromethylarenes
作者:Shaozhong Ge、Wojciech Chaładaj、John F. Hartwig
DOI:10.1021/ja501117v
日期:2014.3.19
α-difluoroketones with aryl and heteroaryl bromides and chlorides catalyzed by an air- and moisture-stable palladacyclic complex containing P(t-Bu)Cy2 as ligand. The combination of this Pd-catalyzed arylation and base-induced cleavage of the acyl–aryl C–C bond within the α-aryl-α,α-difluoroketone constitutes a one-pot, two-step procedure to synthesize difluoromethylarenes from aryl halides. A broad range
[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.
METAL-CATALYZED COUPLING OF ARYL AND VINYL HALIDES WITH ALPHA, ALPHA-DIFLUOROCARBONYL COMPOUNDS
申请人:THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
公开号:US20160052854A1
公开(公告)日:2016-02-25
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.
Decarboxylative arylation with diaryliodonium(<scp>iii</scp>) salts: alternative approach for catalyst-free difluoroenolate coupling to aryldifluoromethyl ketones
α-Aryl-α,α-difluoroketones were synthesized via decarboxylative arylation using diaryliodonium salts under catalyst-free conditions without organometallic intermediates. The products can be transformed into various difluorinated functional groups.
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.