sulfuric acid; water; acetic acid 5 h; Heating;

1: 65 percent / dimethylformamide / 2 h / 80 °C 2: Br2 / 1.25 h / 105 - 115 °C 3: AlCl3 / 1 h / Heating 4: 82 percent / H2SO4/AcOH/H2O (1:1:1) / 5 h / Heating View Scheme

1: AlCl3 / 1 h / Heating 2: 82 percent / H2SO4/AcOH/H2O (1:1:1) / 5 h / Heating View Scheme

1: Br2 / 1.25 h / 105 - 115 °C 2: AlCl3 / 1 h / Heating 3: 82 percent / H2SO4/AcOH/H2O (1:1:1) / 5 h / Heating View Scheme