nitrobenzene T=170 - 180°C; 3 h;

1: 26 percent / 10percent Na2CO3 / 8 h / Heating 2: 61 percent / nitrobenzene / 3 h / 170 - 180 °C View Scheme

1: 77 percent / 10percent NaOH / H2O / 3 h / Heating 2: 64 percent / SOCl2 / 2 h / Heating 3: 68 percent / POCl3, DMF / 2 h / Heating View Scheme

1: 77 percent / 10percent NaOH / H2O / 3 h / Heating 2: 64 percent / SOCl2 / 2 h / Heating View Scheme

1: 77 percent / 10percent NaOH / H2O / 3 h / Heating 2: 64 percent / SOCl2 / 2 h / Heating 3: 68 percent / POCl3, DMF / 2 h / Heating 4: 6 percent / MCPBA / 1,2-dichloro-ethane / 39 h / 65 °C 5: 10 percent / NaOH / H2O / 5 h / 70 - 80 °C View Scheme