A direct approach to α-hydroxy and α-chloro trifluoromethyl derivatives
作者:Lucie Tournier、Samir Z. Zard
DOI:10.1016/j.tetlet.2004.11.086
日期:2005.1
S-1-Acyloxy-2,2,2-trifluoroethyl and S-1-chloro-2,2,2-trifluoroethyl dithiocarbonates add efficiently to various functionalised olefins to give the corresponding adducts via a radical chain reaction initiated by a small amount of lauroyl peroxide. (C) 2004 Elsevier Ltd. All rights reserved.
O-Ethyl-S-(1,2,2,2-Tetrafluoroethyl)-Dithiocarbonate: A Convenient Reagent for the Generation and Capture of 1,2,2,2-Tetrafluoroethyl Radicals
作者:Samir Zard、David Clemente-Tejeda
DOI:10.1055/s-0035-1560539
日期:——
The synthesis of a new fluorinated reagent O-ethyl S-(1,2,2,2-tetrafluoroethyl) carbonodithioate (xanthate) and its use for the generation and capture of the hitherto unexplored 1,2,2,2-tetrafluoroethyl radicals is described. This reagent allows the convenient introduction of the rare CF3CHF motif onto various olefinic substrates with a high functional-group tolerance.
A convergent, modular access to α-chloro-trifluoromethyl derivatives and to 1,1-difluoroalkenes
作者:Pierre Salomon、Wioletta Kosnik、Samir Z. Zard
DOI:10.1016/j.tet.2014.11.021
日期:2015.9
An efficient protocol for the preparation of S-(1-chloro-2,2,2-trifluoroethyl)-O-ethyl xanthate is reported. This reagent serves as a versatile precursor of highly functionalized gem-difluoroalkenes through various inter- and intramolecular radical reactions and subsequent reduction with activated magnesium metal. (C) 2014 Elsevier Ltd. All rights reserved.
Novel compounds comprising a thiocarbonyl-sulfanyl group, which can be used for the radical synthesis of-alpha-perfluoroalkylamines
申请人:Zard Samir
公开号:US20060122404A1
公开(公告)日:2006-06-08
The invention relates to compounds having the general formula (I), the method of preparation thereof and the use thereof in organic radical synthesis. The invention also relates to compounds having the formula (II), the method of preparation thereof and a method for preparing compounds having the formula (VIII).