Reactions of nitric oxide (NO) with amines in organic solventswere studied using Hantzschdihydropyridines and aromatic primary amines as substrates.Hantzsch dihydropyridines arereadily oxidized by nitric oxide to give the corresponding pyridines inquantitative yields. Theaddition of oxygen accelerates the reaction rate considerably. Onthe other hand, aromatic primaryamines give deaminated products by the reaction with nitric oxide onlyin the presence of oxygenin ethereal solvents or chloroform.
