1,2-Acylphosphinylationof Styrenes to Access β‑Aryl-γ-ketophosphineOxides by Irradiation-Induced Radical Relay

An acylphosphinylation reaction has been devised for the synthesis of β-aryl-γ-ketophosphine oxides, employing styrenes and acyl azolium salts through an irradiation-induced radical relay mechanism. This method effectively constructs C–C and C–P bonds while demonstrating excellent functional group tolerance. Mechanistic studies revealed that a radical-addition–coupling–elimination cascade process was involved in this reaction.