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 4: anh. K2CO3 / acetone / 6 h / Heating 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 5: anh. K2CO3 / acetone / 6 h / Heating View Scheme

1: phosphorus oxychloride / chlorobenzene / 24 h / Ambient temperature 2: 80 percent / 85percent formic acid; 30percent H2O2 / 16 h / 5 °C 3: anh. K2CO3 / acetone / 6 h / Heating View Scheme

1: 80 percent / 85percent formic acid; 30percent H2O2 / 16 h / 5 °C 2: anh. K2CO3 / acetone / 6 h / Heating View Scheme

potassium carbonate in acetone 6 h; Heating;