Catalytic system of Au nanoparticles supported on metal oxides has been developed to produce azoarenes in one-step directly from nitroarenes under mild conditions (30 °C, 1 bar of N2) using 2-propanol as solvent and reducing agent. Close to 100 % chemoselectivity to substituted azoarenes with different functional groups left intact and close to quantitative yields make this procedure promising for the production of azoarenes.
Paul Joseph Dyson, Mingyang Liu, Yelin Hu, Matthias Beller