potassium permanganate in acetone T=40°C; 1 h;

silver(l) oxide in methanol; water T=60°C; 2 h;

1: 90 percent / KOH / dimethylformamide / 2 h / 80 - 90 °C 2: 76 percent / 30percent hydrogen peroxide, acetic acid / 12 h / 70 - 80 °C 3: 61 percent / acetic acid / Heating 4: 63 percent / KOH / ethanol; H2O / 2 h / Heating 5: 73 percent / KMnO4 / acetone / 1 h / 40 °C View Scheme

1: 90 percent / KOH / dimethylformamide / 2 h / 80 - 90 °C 2: 76 percent / 30percent hydrogen peroxide, acetic acid / 12 h / 70 - 80 °C 3: 61 percent / acetic acid / Heating 4: 63 percent / KOH / ethanol; H2O / 2 h / Heating 5: 73 percent / KMnO4 / acetone / 1 h / 40 °C View Scheme

1: 76 percent / 30percent hydrogen peroxide, acetic acid / 12 h / 70 - 80 °C 2: 61 percent / acetic acid / Heating 3: 63 percent / KOH / ethanol; H2O / 2 h / Heating 4: 73 percent / KMnO4 / acetone / 1 h / 40 °C View Scheme

1: 61 percent / acetic acid / Heating 2: 63 percent / KOH / ethanol; H2O / 2 h / Heating 3: 73 percent / KMnO4 / acetone / 1 h / 40 °C View Scheme

1: 63 percent / KOH / ethanol; H2O / 2 h / Heating 2: 73 percent / KMnO4 / acetone / 1 h / 40 °C View Scheme