A common sulfinamide is tert-butanesulfinamide (Ellmans sulfinamide), p-toluenesulfinamide (Davis sulfinamide), and 2,4,6-trimethylbenzenesulfinamide. 
Sulfinamides arise in nature by the addition of nitroxyl (HNO) to thiols:
:RSH + HNO → RS(O)NH