Fluoroalkyl sulfides as photoredox-active coupling reagents for alkene difunctionalization

A visible-light-promoted fluoroalkylation-thiolation of alkenes is described. 4-Tetrafluoropyridinylthio fragment serves as a photoredox-active group in the initiation step and undergoes radical group transfer important for the reaction efficiency. In the primary products, the pyridinylthio substituent may be further functionalized via radical processes or aromatic substitution reaction.