Palladium complex-catalysed reductive N-heterocyclization of N-(2-nitrobenzylidene)amines into 2H-indazole derivatives
Abstract
Dichlorobis(triphenylphosphine)palladium–tin(II) chloride system effectively catalyses the selective transformation of N-(2-nitrobenzylidene)amines into the corresponding 2H-indazole derivatives under carbon monoxide via a reductive N-heterocyclization reaction.