formic acid; dihydrogen peroxide T=5°C; 16 h;

1: 1,2-dihydroxy-4,5-methylenedioxybenzene With sodium hydroxide in water 0.25 h; Cooling with ice; 2: methyl iodide in water 1 h; Reflux;

1: anh. K2CO3 / acetone / Heating 2: phosphorus oxychloride / chlorobenzene / 24 h / Ambient temperature 3: 80 percent / 85percent formic acid; 30percent H2O2 / 16 h / 5 °C View Scheme

1: 35 percent / 85percent formic acid; 30percent H2O2 / 16 h / 5 °C 2: anh. K2CO3 / acetone / Heating 3: phosphorus oxychloride / chlorobenzene / 24 h / Ambient temperature 4: 80 percent / 85percent formic acid; 30percent H2O2 / 16 h / 5 °C View Scheme

1: phosphorus oxychloride / chlorobenzene / 24 h / Ambient temperature 2: 80 percent / 85percent formic acid; 30percent H2O2 / 16 h / 5 °C View Scheme

potassium carbonate in acetone 6 h; Heating;

potassium carbonate in acetone 6 h; Heating;