The Transition Metal-Catalyzed N-Alkylation and N-Heterocyclization. A Reductive Transformation of Nitrobenzene Into N,n-Dialkylaniline and 2,3-Substituted Quinoline Using Aldehyde and Carbon Monoxide

The catalytic N-alkylation and N-heterocyclization of nitrobenzene occurs at 180°C under pressures of carbon monoxide(70 atm) in the presence of aldehyde and transition metal complexes to give 2,3-dialkyl quinoline and N,N-dialkylaniline in good yields. The product selectivity highly depends on the catalysts.