sulfuric acid in acetic acid 1.5 h; Heating;

1: dimethylformamide / 20 h / Heating 2: 70 percent / 50percent H2SO4 / acetic acid / 1.5 h / Heating View Scheme

1: 83 percent / KI / various solvent(s) / 4.5 h / 150 °C 2: dimethylformamide / 20 h / Heating 3: 70 percent / 50percent H2SO4 / acetic acid / 1.5 h / Heating View Scheme

1: 83 percent / KI / various solvent(s) / 4.5 h / 150 °C 2: dimethylformamide / 20 h / Heating 3: 70 percent / 50percent H2SO4 / acetic acid / 1.5 h / Heating View Scheme