Selective oxidation and chlorination of trifluoromethylsulfide using trichloroisocyanuric acid in ionic liquid
摘要:
A route to chemoselective oxidation and chlorination of aryltrifluoromethylsulfide using trichloroisocyanuric acid (TCCA) in ionic liquid, an efficiently O-methylation reaction and a reduction of nitro- to amido- in excellent yields have been developed. (c) 2007 Elsevier B.V. All rights reserved.
A high yielding, simple, and flexible copper-based system for N-arylation of fluorinated sulfoximines is reported. Best results were achieved using copper iodide in combination with DMEDA and Cs2CO3 to provide a wide range of N-arylated perfluoroalkylated sulfoximines. These conditions tolerate a great number of substituents on either aromatic cycle, including heteroaromatic rings, for the N-functionalization
据报道,用于氟化亚砜亚胺的N-芳基化的高产量,简单且灵活的铜基体系。碘化铜与DMEDA和Cs 2 CO 3组合使用可提供最佳的N-芳基化全氟烷基化亚砜基亚胺,从而获得最佳结果。这些条件容许任一芳香环上的许多取代基,包括杂芳香环,用于N-官能化。
Sulfilimines and Sulfoximines by Reaction of Nitriles with Perfluoroalkyl Sulfoxides
perfluoroalkylated sulfoxides with trifluoromethanesulfonic anhydride behaves as highly electrophilic entities. Their reaction with nitriles allows a Ritter-like process leading to the new fluorinated acylsulfilimines 1–21 after hydrolysis. This flexible methodology allows some variation of both the sulfoxide and nitrile components. Derived acylsulfoximines 22–25 or free sulfoximines 26–28 could be selectively
the preparation of trifluoromethyl N-acyl sulfilimines to the case of bromodifluoro- and dichlorofluoromethyl derivatives. Attempts to convert such N-acyl sulfilimines to free NH-sulfilimines failed. However, a strategy based on the reaction of their direct ditriflyl ketal precursor with amines allows the isolation of either original sulfilimino iminium salts using secondary amines or of free NH-sulfilimines
previously developed for the preparation of perfluoroalkyl sulfilimines by a reaction between fluorinated sulfoxides and nitriles, has been successfully extended to dinitriles. According to the reaction conditions, we can preferentially produce a cyano monosulfilimine or a bis(sulfilimine). New cyano thioethers have been synthesized through a rearrangement process. Mono- and bis(sulfilimine)s were also
Nucleophilic trifluoromethylation of organic substrates using (trifluoromethyl)trimethylsilane in the presence of a fluoride anion II. A convenient route to aryltrifluoromethyl-sulfides, -sulfoxides and -sulfones
作者:Valeria N. Movchun、Alexander A. Kolomeitsev、Yurii L. Yagupolskii
DOI:10.1016/0022-1139(94)03124-i
日期:1995.2
Aryltrifluoromethyl-sulfides, -sulfoxides and -sulfones can be prepared by trifluoromethylation of the corresponding arylsulfenyl, -sulfinyl and -sulfonyl halidesusing (trifluoromethyl)trimethylsilane in the presence of fluoride sources, such as TASF [tris(dimethylamino)sulfonium difluorotrimethylsilicate].