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The installation of fluoromethyl group into organic molecules has received increasing attention due to its favorable influence on the absorption,distribution,metabolism,and excretion of pharmaceuticals.1 Compared with the trifluoromethylationreactions,the introduction of a CF2H group into organic molecules is less explored mainly due to the shortage of readily accessible difluoromethylating reagents and low reactivity of corresponding difluoromethylating precursors.2-3 Herein,we report an electrochemical oxidative oxy-fluoromethylation of alkenes for the synthesis of fluoromethylated lactones(Figure 1).This environmentally benign protocol is compatible with both Oxy-trifluoromethylation and Oxy-difluoromethylation of alkenes by using bench-stable solids CF3SO2Na and CF2HSO2Na as the CF3·and CF2H·sources,respectively.