Photocatalytic Consecutive\nPhotoinduced Electron Transfer-Enabled\nC(sp<sup>3</sup>)–H Pyridylation of Dihydroquinoxalin-2-ones

A photocatalytic decyanative C(sp<sup>3</sup>)–H\npyridination\nof dihydroquinoxalin-2-ones with 4-cyanopyridines was developed by\nutilizing 4CzIPN as the photocatalyst. Mechanism studies show that\nthis organophotocatalytic direct C(sp<sup>3</sup>)–H pyridination\nundergoes a radical–radical cross-coupling pathway promoted\nby consecutive photoinduced electron transfer.