Scheme 3.
Scope of photoredox trifluoromethoxylation in continuous-flow. In case of different products, the major isomer is shown. The position of the CF3O group in the minor isomer is marked with a star. 19F NMR yields are reported. a CH3CN/CH2Cl2 3:2, 0.08 M; b CH3CN/CH2Cl2 1:1, 0.05 M; c CH3CN/CH2Cl2 5:3, 0.05 M; d CH3CN/CH2Cl2 3:2, 0.02 M; e CH3CN/CH2Cl2 5:4, 0.057 M.
