Ultraviolet-Light-Induced\nP–H Insertion of\nα‑Halocarbenes

An intriguing P–H insertion\nof arylhalodiazirines with <i>H</i>-phosphorus oxides under\n ultraviolet-light irradiation\nis described. This methodology provides an efficient and straightforward\nroute to the construction of a variety of α<i>-</i>halophosphorus oxides in good yields (≤95%), which represents\na unique example of P–H insertion of α<i>-</i>halocarbenes for C–P bond formation. The metal-free protocol\nfeatures the advantages of mild reaction conditions, high atom economy,\nand environmental friendliness.