An oven-dried Schlenk tube containing a stirring bar was charged with 2- (cyclopropylmethyl)-2-phenyl-2,3-dihydroquinazolin-4(1H)-one (2s, 1.2 equiv.), αtrifluoromethyl alkene (3a, 0.2 mmol, 1 equiv.), 4CzIPN (1 mol%), and CsF (1.2 equiv.). The tube was connected to a vacuum line where it was evacuated and back-filled with N2 for three times. Then DMF (2 mL) was added under N2 atmosphere. Finally, the reaction mixture in sealed tube was stirred at room temperature for 12 h under continuous light irradiation from 40 W blue LED (λ = 440 nm). The reaction was quenched by the addition of brine solution (2 mL) and then extracted with ethyl acetate (3×5 mL). The combined organic layers were washed once again with water (5 mL), followed by brine (5 mL) and the solvents were removed under reduced pressure. The crude reaction mixture was purified by column chromatography through silica gel (eluent: petroleum ether/ethyl acetate) to afford pure product 4sa (colorless oil, 28.5 mg, yield 50%).