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。
Metallaphotoredox Difluoromethylation of Aryl Bromides
作者:Vlad Bacauanu、Sébastien Cardinal、Motoshi Yamauchi、Masaru Kondo、David F. Fernández、Richard Remy、David W. C. MacMillan
DOI:10.1002/anie.201807629
日期:2018.9.17
strategy for the difluoromethylation of arylbromides by metallaphotoredox catalysis. Bromodifluoromethane, a simple and commercially available alkyl halide, is harnessed as an effective source of difluoromethyl radical by silyl‐radical‐mediated halogen abstraction. The merger of this fluoroalkyl electrophile activation pathway with a dual nickel/photoredox catalytic platform enables the difluoromethylation