New stable reagents for the nucleophilic trifluoromethylation. Part 4: Trifluoromethylation of disulfides and diselenides with hemiaminals of trifluoroacetaldehyde
作者:G Blond、T Billard、B.R Langlois
DOI:10.1016/s0040-4039(01)00225-8
日期:2001.3
Hemiaminals of fluoral and derivatives have been previously described as efficient new reagents for the nucleophilic trifluoromethylation of carbonyl compounds. Their use has been extended to the synthesis of trifluoromethyl sulfides and selenides fromdisulfides and diselenides.
New Stable Reagents for the Nucleophilic Trifluoromethylation. 1. Trifluoromethylation of Carbonyl Compounds with <i>N</i>-Formylmorpholine Derivatives
作者:T. Billard、S. Bruns、B. R. Langlois
DOI:10.1021/ol005987o
日期:2000.7.1
A new stable equivalent of the trifluoromethyl anion has been synthesized from fluoroform. It reacts with nonenolizable carbonyl compounds such as the Ruppert's reagent.
Reactivity of Stable Trifluoroacetaldehyde Hemiaminals. 2. Generation and Synthetic Potentialities of Fluorinated Iminiums
作者:Thierry Billard、Bernard R. Langlois
DOI:10.1021/jo016265t
日期:2002.2.1
Under Lewis acid activation, hemiaminals of trifluoroacetaldehyde and related (fluoroalkyl)-aldehydes generate iminium species that can react with various nucleophiles to provide fluorinated amines.
New stable reagents for the nucleophilic trifluoromethylation. Part 2: Trifluoromethylation with silylated hemiaminals of trifluoroacetaldehyde
作者:T Billard、B.R Langlois*、G Blond
DOI:10.1016/s0040-4039(00)01552-5
日期:2000.11
New reagents for the nucleophilic trifluoromethylation have been easily synthesized from fluoral hemiketal. They provide silylated trifluoromethylcarbinol from non-enolizable carbonyl compounds. (C) 2000 Elsevier Science Ltd. All rights reserved.
Reactivity of Stable Trifluoroacetaldehyde Hemiaminals. 1. An Unexpected Reaction with Enolizable Carbonyl Compounds
作者:Gaëlle Blond、Thierry Billard、Bernard R. Langlois
DOI:10.1021/jo015587u
日期:2001.7.1
In the presence of enolizable carbonyl compounds, hemiaminals of fluoral and related polyfluoro-aldehydes behave as equivalents of fluoroalkyl iminium compounds and provide beta -polyfluoroalkyl beta -dialkylamino ketones, which are easily transformed, under acidic conditions, into beta -polyfluoroalkylenones.