Visible-light-enabled oxyazidation of alkenes leading to alpha-azidoketones in air

A new and facile visible-light-enabled method for the synthesis of -azidoketones has been developed via oxyazidation of alkenes with TMSN3 in air at room temperature. A series of -azidoketones could be easily and efficiently obtained in moderate to excellent yields via cascade C-N and C?O bond formation by simply using low-toxic and inexpensive Rose Bengal (1 mol%) and PhSeSePh (5 mol%) as co-catalysts.