Silver-Catalyzed C–H Trifluoromethylation of Arenes Using Trifluoroacetic Acid as the Trifluoromethylating Reagent
摘要:
Direct trifluoromethylation of arenes using TFA as the trifluoromethylating reagent was achieved with Ag as the catalyst. This reaction not only provides a new protocol for aryl CH trifluoromethylation, but the generation of CF3 from TFA may prove useful in other contexts and could potentially be extended to other trifluoromethylation reactions.
A new approach to the photochemical trifluoromethylation of aromatic compounds
作者:Cuiwei Lai、Thomas E. Mallouk
DOI:10.1039/c39930001359
日期:——
Using silver trifluoroacetate as a source of CF3· radicals and powdered TiO2 as a photocatalyst, electrophilic substitution of the trifluoromethyl group for hydrogen occurs in moderate to good yield for a variety of aromatic compounds.
Electrophotocatalytic perfluoroalkylation by LMCT excitation of Ag(II) perfluoroalkyl carboxylates
作者:Brandon M. Campbell、Jesse B. Gordon、Elaine Reichert Raguram、Miguel I. Gonzalez、Kristopher G. Reynolds、Matthew Nava、Daniel G. Nocera
DOI:10.1126/science.adk4919
日期:2024.1.19
centers in [Ag(bpy) 2 (TFA)][OTf] and Ag(bpy)(TFA) 2 complexes to activate trifluoroacetate (TFA) by visible-light-induced homolysis. The resulting trifluoromethyl radicals may react with a variety of arenes to forge C(sp2 )–CF 3bonds. This methodology is general and extends to other perfluoroalkyl carboxylates of higher chain length (RF CO 2 – ; RF = CF2CF3 or CF2CF2CF3 ). The photoredox