An efficient photoredox-catalyzed halo-trifluoromethylation reaction of 1,7-enynes has been developed under mild conditions. This photocatalytic protocol provides an efficient and functional strategy leading to CF 3 − and halogen-containing 3,4-dihydroquinolin-2(1H)-ones from a wide range of 1,7-enynes through two different radical pathways. The reaction mechanism was proposed based on the control experiments. (Figure presented.).
- radical pathway