Copper(i)-catalysed oxidative C–N coupling of 2-aminopyridine with terminal alkynes featuring a CC bond cleavage promoted by visible light

Facile visible-light promoted copper-catalyzed aerobic oxidative C-N coupling between 2-aminopyridine and terminal alkynes at room temperature via C[triple bond, length as m-dash]C triple bond cleavage is described. This reaction allows direct synthesis of biologically important pyridyl amides by utilization of commercially available starting materials without the need for bases/external oxidants.