We have reported the dual visible light photo-nickel-catalytic desaturation of aliphatic Nheterocycles with coupled dihydrogen evolution. The reaction does not require stoichiometric reagents, is overall redox neutral and gives synthetic access to cyclic enamides and cyclic enecarbamates from simple starting materials. The valuable products are obtained by a reaction with perfect atom economy under mild and energy efficient conditions. Subsequent cycloaddition reactions or ring functionalization convert cyclic enecarbamates as unique building blocks into a variety of target structures. Scheme S1: The desaturation of tetrahydronaphthalenes, Tetralones, Carbonyl compounds, and tetrahydroquinoline 6.