Phototriggered Self-Catalyzed\nPhosphorylation of 3,4-Dihydroquinoxalin-2(1<i>H</i>)‑ones\nwith Diarylphosphine Oxides in EtOH

A highly effective external photocatalyst- and additive-free\nmethod\nfor the phosphorylation of 3,4-dihydroquinoxalin-2(1<i>H</i>)-ones to produce phosphorylated dihydroquinoxalin-2(1<i>H</i>)-ones has been reported. A wide variety of phosphorylated products\nwere formed in good to excellent yields. Preliminary mechanistic studies\nreveal that the phosphorylation process involves an EnT process, a\nSET process, a HAT process, and a deprotonation process.