The annulation reactions of benzoamidyl radicals with alkenes were realized under visible light irradiation with fac-Ir(ppy)3 as catalyst and N-aminopyridinium salts as benzoamidyl radical precursors. The reaction can deliver two distinct types of products: in the case of vinyl arenes, [3 + 2] annulation product dihydrooxazoles were yielded exclusively; when alkyl-substituted alkenes were used, on the
Regioselective cycloadditions of N-protonated azomethine ylides and 2-azaallyl anions generated from N-(silylmethyl) thioimidates, synthetic equivalents of nonstabilized nitrile ylides