Organoselenium-Catalyzed Oxidative Allylic Fluorination with Electrophilic N-F Reagent

An efficient route of organoselenium-catalyzed oxidative allylic fluorination has been developed. In this transformation, bulky electrophilic fluorinating reagent N-fluoro-2,4,6-trimethylpyridinium triflate (TMFP-OTf) was employed as the oxidant and fluorine source. Notably, TEMPO as an additive affects the fluorination and leads to better substrate scope and excellent functional group tolerance. By this protocol, a variety of allylic fluorides were synthesized in good to excellent yields. The obtained allylic fluorides could be converted into vinyl fluorides efficiently in the presence of an appropriate base.