Vg. Koshechko et al., ELECTROCHEMICAL INITIATION BY SULFUR-DIOXIDE OF RADICAL-CHAIN TRIFLUOROMETHYLATION PROCESSES OF THIOPHENOLS WITH BROMOTRIFLUOROMETHANE, Journal of fluorine chemistry, 70(2), 1995, pp. 277-278
Sulfur dioxide may serve as an efficient catalyst for the electrochemi
cal trifluoromethylation of thiophenols by Freon F13B1 (CF3Br), which
enables implementation of trifluoromethylation in an energy-saving rad
ical-chain regime.