1: 94 percent / nitrobenzene / 1 h / Heating 2: 71 percent / ceric ammonium nitrate / acetonitrile; H2O / 0.17 h / 0 °C 3: 100 percent / aq. K2CO3 / 5 h / 60 °C View Scheme

 in  nitrobenzene 1 h;  Heating;