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.