Photocatalyst-free, visible-light-induced borylation and selenylation of aryltriazenes

) in the presence of trifluoroacetic acid as an additive under blue LED irradiation without requiring transition-metal catalysts. Using this protocol, a broad range of arylboronate esters were successfully synthesized under mild conditions. The protocol was extended to C-Se bond formation using diphenyl diselenide, providing unsymmetrical diaryl selenides. Overall, this method represents a promising and sustainable approach for the functionalization of aryltriazenes.