Copper-Catalyzed <i>gem</i>-Difluoroolefination of Diazo Compounds with TMSCF₃ via C–F Bond Cleavage

Abstract

A novel Cu-catalyzed gem-difluoroolefination of diazo compounds is described. This transformation starts from readily available TMSCF3 and diazo compounds, via trifluoromethylation followed by C-F bond cleavage, to afford the desired 1,1-difluoroalkene products.