Visible-light-induced cascade radical cyclization to access sulfamoylated benzo[4,5]imidazo[2,1-a]isoquinolin-6(5H)-ones

A visible-light-induced cascade radical sulfamoylation/cyclization of 2-arylbenzoimidazoles to access sulfamoylated benzo[4,5]imidazo[2,1-a]isoquinolin-6(5H)-ones was achieved.