Mg–Cu bimetal system for selective CF bond activation
摘要:
Bimetal system of Mg-CuCl I in DMI for selective C-F and C-Cl bonds activation has been examined. This article involves (1) a short overview of bimetal system of Mg-metals for selective C-F bond activation, (2) C-F bond activation of alkyl trifluoroacetates leading to alkyl difluoro(trimethylsilyl)acetates via difluoroketene silyl acetal, (3) selective C-Cl bond activation of 3- and 4-chloropentafluoroethylbenzenes, (4) C-F bond activation of substituted benzotrifluorides and (5) microscopic observation of an active site of magnesium surface formed in Mg-CuCl system and elucidation of reaction mechanism of C-Cl and C-F bond activation at the active site. (C) 2013 Elsevier B.V. All rights reserved.
The present invention relates to pentafluoroethylating compositions, processes for obtaining them, and their use in pentafluoroethylation reactions.
本发明涉及五氟乙基化组合物,获取它们的过程,以及它们在五氟乙基化反应中的应用。
Cupration of C<sub>2</sub>F<sub>5</sub>H: Isolation, Structure, and Synthetic Applications of [K(DMF)<sub>2</sub>][(<i>t</i>-BuO)Cu(C<sub>2</sub>F<sub>5</sub>)]. Highly Efficient Pentafluoroethylation of Unactivated Aryl Bromides
作者:Anton Lishchynskyi、Vladimir V. Grushin
DOI:10.1021/ja407017j
日期:2013.8.28
Pentafluoroethane, C2F5H (HFC-125), is smoothly cuprated with preisolated or in situ-generated [K(DMF)][(t-BuO)(2)Cu] to give [K(DMF)(2)][(t-BuO)Cu(C2F5)] (1) in nearly quantitative yield. Complex 1 has been isolated, structurally characterized, and demonstrated to be an exceedingly versatile pentafluoroethylating reagent for a variety of substrates, including unactivated aryl bromides.
Cu-deposits on Mg metal surfaces promote electron transfer reactions
作者:Shinya Utsumi、Toshimasa Katagiri、Kenji Uneyama
DOI:10.1016/j.tet.2011.11.082
日期:2012.1
The enhancement of the electron transfer processes in the Grignard reagent formation-type ring silylation and the defluorination-silylation of perfluoroalkyl benzenes by Cu(0)-deposited Mg metal were confirmed. Microscopic analysis and substituent effects implied a different reduction process in the presence of Cu-deposited Mg metal than in the presence of bare Mg metal. (C) 2011 Elsevier Ltd. All rights reserved.
CARR, GILLIAN E.;CHAMBERS, RICHARD D.;HOLMES, THOMAS F.;PARKER, DAVID G., J. CHEM. SOC. PERKIN TRANS. PT 1,(1988) N 4, 921-926
作者:CARR, GILLIAN E.、CHAMBERS, RICHARD D.、HOLMES, THOMAS F.、PARKER, DAVID G.