potassium carbonate; sodium iodide in N,N-dimethyl-formamide T=90°C;

1: 66 percent / 3 h / Heating 2: 81 percent / potassium t-butoxide / 2-methyl-propan-2-ol / 0.25 h / 45 °C 3: 79 percent / ammonium molybdate, 30percent hydrogen peroxide / methanol; H2O / Ambient temperature; overnight 4: 100 percent / sodium methoxide / methanol / 0.17 h / 25 °C View Scheme

1: 66 percent / 3 h / Heating 2: 81 percent / potassium t-butoxide / 2-methyl-propan-2-ol / 0.25 h / 45 °C 3: 79 percent / ammonium molybdate, 30percent hydrogen peroxide / methanol; H2O / Ambient temperature; overnight View Scheme