Access to Difluoromethylated Arenes by Pd-Catalyzed Reaction of Arylboronic Acids with Bromodifluoroacetate
作者:Zhang Feng、Qiao-Qiao Min、Xingang Zhang
DOI:10.1021/acs.orglett.5b03206
日期:2016.1.4
of aryl boronic acids with bromodifluoroacetate is described. The reaction proceeds under mild reaction conditions with hydroquinone and Fe(acac)3 as additives. Preliminary mechanistic studies reveal that a difluorocarbene pathway is involved in the reaction, which is unusual compared to the most traditional approaches. This reaction has advantages of high efficiency and excellent functional group compatibility
represents the ideal and most straightforward difluoromethylating reagent, but introduction of the difluoromethyl group (CF2H) from ClCF2H into aromatics has not been reported. Here, we describe a direct palladium-catalysed difluoromethylation method for coupling ClCF2H with arylboronic acids and esters to generate difluoromethylated arenes with high efficiency. The reaction exhibits a remarkably broad substrate
Palladium-Catalyzed Difluoromethylation of Aryl Chlorides and Bromides with TMSCF<sub>2</sub>H
作者:Devin M. Ferguson、Christian A. Malapit、James R. Bour、Melanie S. Sanford
DOI:10.1021/acs.joc.9b00324
日期:2019.3.15
A palladium-catalyzed cross-coupling of arylchlorides/bromides with TMSCF2H is described. Two different catalysts, Pd(dba)2/BrettPhos and Pd(PtBu3)2, are demonstrated and provide a variety of difluoromethylated arenes in good yields.
描述了钯催化的芳基氯化物/溴化物与TMSCF 2 H的交叉偶联。演示了两种不同的催化剂Pd(dba)2 / BrettPhos和Pd(P t Bu 3)2,它们以高收率提供了多种二氟甲基化的芳烃。
A Difluoromethylation Reagent: Access to Difluoromethyl Arenes through Palladium Catalysis
作者:Xia Chen、Yining Liu、Sheng Zhang、Yang Li、Xiao-Yu Zhou、Xiaoqiang Yu、Xiujuan Feng、Yoshinori Yamamoto、Ming Bao
DOI:10.1021/acs.orglett.4c02161
日期:2024.7.19
A new radical difluoromethylation was developed by using inexpensive and readily available difluoroacetic anhydride and N-phenyl-4-methylbenzenesulfonamide for the first time. The reaction of arylboronic acids with the new difluoromethylation reagent, N-phenyl-N-tosyldifluoroacetamide, proceeded smoothly in the presence of palladium catalyst to provide difluoromethylarenes in satisfactory to excellent