sodium hydroxide in water T=70 - 80°C; 5 h;

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

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

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

1: 26 percent / 10percent Na2CO3 / 8 h / Heating 2: 61 percent / nitrobenzene / 3 h / 170 - 180 °C 3: 77 percent / 10percent NaOH / H2O / 3 h / Heating 4: 64 percent / SOCl2 / 2 h / Heating 5: 68 percent / POCl3, DMF / 2 h / Heating 6: 6 percent / MCPBA / 1,2-dichloro-ethane / 39 h / 65 °C 7: 10 percent / NaOH / H2O / 5 h / 70 - 80 °C View Scheme

1: 61 percent / nitrobenzene / 3 h / 170 - 180 °C 2: 77 percent / 10percent NaOH / H2O / 3 h / Heating 3: 64 percent / SOCl2 / 2 h / Heating 4: 68 percent / POCl3, DMF / 2 h / Heating 5: 6 percent / MCPBA / 1,2-dichloro-ethane / 39 h / 65 °C 6: 10 percent / NaOH / H2O / 5 h / 70 - 80 °C View Scheme

1: 6 percent / MCPBA / 1,2-dichloro-ethane / 39 h / 65 °C 2: 10 percent / NaOH / H2O / 5 h / 70 - 80 °C View Scheme

sodium hydroxide in water 2 h; Heating;