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
Electrochemical-Promoted Nickel-Catalyzed Oxidative Fluoroalkylation of Aryl Iodides
作者:Zhenlei Zou、Heyin Li、Mengjun Huang、Weigang Zhang、Sanjun Zhi、Yi Wang、Yi Pan
DOI:10.1021/acs.orglett.1c02997
日期:2021.11.5
This work describes a general strategy for metal-catalyzed cross-coupling of fluoroalkyl radicals with aryl halides under electrochemical conditions. The contradiction between anodic oxidation of fluoroalkyl sulfinates and cathodic reduction of low-valentnickel catalysts can be well addressed by paired electrolysis, allowing for direct introduction of fluorinated functionalities into aromatic systems
Sandmeyer Difluoromethylation of (Hetero-)Arenediazonium Salts
作者:Christian Matheis、Kévin Jouvin、Lukas J. Goossen
DOI:10.1021/ol5030037
日期:2014.11.21
straightforward conversion of (hetero-)arenediazonium salts into the corresponding difluoromethyl (hetero-)arenes under mild conditions. The actual difluoromethylating reagent, a difluoromethyl–copper complex, is formed in situfrom copper thiocyanate and TMS–CF2H. The diazonium salts are either preformed or generated in situfrom broadly available aromatic amines.
[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.
Direct Difluoromethylation of Aryl Halides via Base Metal Catalysis at Room Temperature
作者:Long Xu、David A. Vicic
DOI:10.1021/jacs.6b00053
日期:2016.3.2
ICF2H with diethyl zinc and DMPU. This new zinc reagent is a free-flowing solid and can be used in combination with a nickel catalyst to difluoromethylate aryl iodides, bromides, and triflates at roomtemperature. Such mild conditions for the catalytic difluoromethylation of these substrates are unprecedented.