1: With sulfuric acid; iron in ethanol; water 1.5 h; Reflux; 2: With ammonia in ethanol; water T=25°C; Further stages;

sulfuric acid T=150°C; 0.333333 h;

1: 92 percent / N,N-diethylaniline / ethanol / 0.17 h / Heating 2: 93 percent / iron, hydrochlorid acid / Heating; 1) water, 1 h, 2) aqueous ethanol, 20 min 3: 77 percent / nitrobenzene / Heating 4: 66 percent / POCl3 / 0.75 h / Heating 5: N,N-dimethyl-acetamide / 0.5 h 6: 59 percent / diluted H2SO4 / 0.33 h / 150 °C View Scheme

1: 77 percent / nitrobenzene / Heating 2: 66 percent / POCl3 / 0.75 h / Heating 3: N,N-dimethyl-acetamide / 0.5 h 4: 59 percent / diluted H2SO4 / 0.33 h / 150 °C View Scheme

1: 93 percent / iron, hydrochlorid acid / Heating; 1) water, 1 h, 2) aqueous ethanol, 20 min 2: 77 percent / nitrobenzene / Heating 3: 66 percent / POCl3 / 0.75 h / Heating 4: N,N-dimethyl-acetamide / 0.5 h 5: 59 percent / diluted H2SO4 / 0.33 h / 150 °C View Scheme

1: 66 percent / POCl3 / 0.75 h / Heating 2: N,N-dimethyl-acetamide / 0.5 h 3: 59 percent / diluted H2SO4 / 0.33 h / 150 °C View Scheme

1: N,N-dimethyl-acetamide / 0.5 h 2: 59 percent / diluted H2SO4 / 0.33 h / 150 °C View Scheme

1: 93 percent / 100percent sulfuric acid, potassium nitrate / 1 h / 15 - 20 °C 2: 92 percent / N,N-diethylaniline / ethanol / 0.17 h / Heating 3: 93 percent / iron, hydrochlorid acid / Heating; 1) water, 1 h, 2) aqueous ethanol, 20 min 4: 77 percent / nitrobenzene / Heating 5: 66 percent / POCl3 / 0.75 h / Heating 6: N,N-dimethyl-acetamide / 0.5 h 7: 59 percent / diluted H2SO4 / 0.33 h / 150 °C View Scheme

1.1: nitric acid / tetrachloromethane 2.1: hydrogen / ethanol / 60 °C / 22052.2 Torr 3.1: sulfuric acid; potassium nitrate 4.1: tin(IV) chloride / nitrobenzene 5.1: nitrobenzene / 17.5 h / 20 - 165 °C 6.1: sulfuric acid; iron / ethanol; water / 1.5 h / Reflux 6.2: 25 °C View Scheme

1.1: hydrogen / ethanol / 60 °C / 22052.2 Torr 2.1: sulfuric acid; potassium nitrate 3.1: tin(IV) chloride / nitrobenzene 4.1: nitrobenzene / 17.5 h / 20 - 165 °C 5.1: sulfuric acid; iron / ethanol; water / 1.5 h / Reflux 5.2: 25 °C View Scheme