trifluoromethylation is quite problematic owing to its low acidity and the lability of the naked trifluoromethyl carbanion generated from HCF3. Herein we report the organic‐superbase‐catalyzed trifluoromethylation of ketones and arylsulfonyl fluorides by HCF3. The reactions were carried out by using a newly developed “superbase organocatalyst system” consisting of catalytic amounts of P4‐tBu and N(SiMe3)3
Trifluoroacetamides from Amino Alcohols as Nucleophilic Trifluoromethylating Reagents
作者:Jérôme Joubert、Solveig Roussel、Carole Christophe、Thierry Billard、Bernard R. Langlois、Thierry Vidal
DOI:10.1002/anie.200351301
日期:2003.7.14
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.
Trifluoromethylation of Nonenolizable Carbonyl Compounds with a Stable Piperazino Hemiaminal of Trifluoroacetaldehyde
作者:Thierry Billard、Bernard R. Langlois、Gaëlle Blond
Trifluoromethanesulfinamide from Ephedrine: A More Efficient Trifluoro-methylating Reagent
作者:Thierry Billard、Bernard R. Langlois、Solveig Roussel、Laurent Saint-Jalmes
DOI:10.1055/s-2004-831322
日期:——
Nucleophilic trifluoromethylation of non-enolizable and enolizable carbonyl compounds was achieved with the trifluoromethanesulfinamide derived from O-silylated ephedrine. In contrast to the trifluoroacetamide analog, previously described, this reagent is able to trifluoromethylate more acidic enolizable compounds.