Fig. 3. Modified standard conditions for benzylic acids. Reaction conditions: 1b (0.2 mmol), Mes-Acr-Me PC-I (2 mol%), 2a (10 mol%), 2,4,6-collidine (1.0 equiv.), DCM/D2O (4 : 1, v/v; 2 mL, 110 eq. of D2O), 45 W blue LEDs, ambient temperature, 10 h. Yield of the isolated product is shown. The deuterium incorporation was determined by 1H NMR analysis.
