Fig. 3: Substrate scope and functional group compatibility of the SS-thiosulfonates.

Reaction conditions: 1 (0.2 mmol), 2 (2 equiv, 0.4 mmol), 4CzIPN (2 mol%, 0.004 mmol), Cu(OTf)2 (20 mol%, 0.04 mmol), (BuO)2P(O)OH (2 equiv, 0.4 mmol), EA (2 mL) at room temperature (rt), 5 W blue LEDs, 12 h in N2. EA ethyl acetate.