Copper-Mediated Fluoroalkylation of Aryl Bromides and Chlorides Enabled by Directing Groups
作者:Jonathan R. Hall、Isaac M. Blythe、Liam S. Sharninghausen、Melanie S. Sanford
DOI:10.1021/acs.organomet.3c00066
日期:——
reactions between N-heterocyclic carbene copper(I) fluoroalkyl complexes and aryl halides bearing ortho-directing groups. Pyridine, pyrazole, oxazoline, imine, and ester directing groups are shown to dramatically enhance the reactivity of aryl bromides and chlorides with (IPr)CuI–fluoroalkyl complexes (IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene; fluoroalkyl = difluoromethyl and pentafluoroethyl)
该报告描述了N-杂环卡宾铜(I)氟烷基配合物与带有邻位定向基团的芳基卤化物之间的反应。吡啶、吡唑、恶唑啉、亚胺和酯导向基团可显着增强芳基溴和芳基氯化物与 (IPr)Cu I – 氟烷基配合物 (IPr = 1,3-双(2,6-二异丙基苯基)咪唑-) 的反应活性2-亚基;氟烷基=二氟甲基和五氟乙基),得到芳基-氟烷基偶联产物。利用这种方法来实现一系列芳基溴底物的铜催化定向氟烷基化。
The trifluoromethylation of chloroaromatics using the copper-CF2Br2 - dialkylamide reaction system
作者:James H Clark、James E Denness、Martin A McClinton、Andrew J Wynd
DOI:10.1016/s0022-1139(00)85007-1
日期:1990.12
The in situ generation of CuCF3 from the reaction of copper, dibromodifluoromethane and either N,N-dimethylformamide or N,N-dimethylacetamide (Burton's reagent) has been used for the direct substitution of chlorine by CF3 in a number of aromatic substrates. Particular attention has been paid to the effects of ring substituents on the efficiency of reaction.