potassium permanganate in water; acetic acid 1 h; Ambient temperature;

1: 90 percent / dimethylformamide / 3 h / 100 °C 2: 76 percent / KMnO4 / acetic acid; H2O / 1 h / Ambient temperature View Scheme

1: acetic anhydride / 3 h / Heating 2: 90 percent / dimethylformamide / 3 h / 100 °C 3: 76 percent / KMnO4 / acetic acid; H2O / 1 h / Ambient temperature View Scheme

1: 14.5 g / cc.HCl / ethanol; H2O / 1 h / Heating 2: acetic anhydride / 3 h / Heating 3: 90 percent / dimethylformamide / 3 h / 100 °C 4: 76 percent / KMnO4 / acetic acid; H2O / 1 h / Ambient temperature View Scheme