5-(Trifluoromethyl)dibenzothiophenium Tetrafluoroborate is used to synthesize ortho-trifluoromethylated and ortho-(fluoro)alkylated pyridine derivatives. It is used as a CF3 source under visible light irradiation for the photoredox-catalyzed trifluoromethylation of electron rich alkene resulting in 1,3-bis(trifluoromethyl)-1-propenyl skeleton.