toluene-4-sulfonic acid in benzene 3 h; Heating;

1: 50 percent / p-toluenesulphonic acid / benzene / 16 h / Heating 2: 15 percent / p-toluenesulphonic acid / benzene / 3 h / Heating View Scheme

1: 30 percent / P2O5 / benzene / 5 h / Heating 2: 50 percent / p-toluenesulphonic acid / benzene / 16 h / Heating 3: 15 percent / p-toluenesulphonic acid / benzene / 3 h / Heating View Scheme

1: 80 percent / 2 N NaOH / acetone / 15 h / 0 - 5 °C 2: 30 percent / P2O5 / benzene / 5 h / Heating 3: 50 percent / p-toluenesulphonic acid / benzene / 16 h / Heating 4: 15 percent / p-toluenesulphonic acid / benzene / 3 h / Heating View Scheme