toluene-4-sulfonic acid in toluene 30 h; Heating;

toluene-4-sulfonic acid in toluene 2 h; Heating;

1: 86 percent / Br2 / benzene / 2 h / Ambient temperature 2: 55 percent / potassium hydroxide / benzene; methanol / 0.58 h 3: 76 percent / p-toluenesulfonic acid / toluene / 2 h / Heating View Scheme

1: 71 percent / acetone / 1 h / Heating 2: 1.) p-toluenesulfonic acid, 2.) aq. potassium carbonate / 1.) benzene, 19 h reflux 2.) methanol, 10 min 3: 89 percent / p-toluenesulfonic acid / toluene / 30 h / Heating View Scheme

1: 1.) p-toluenesulfonic acid, 2.) aq. potassium carbonate / 1.) benzene, 19 h reflux 2.) methanol, 10 min 2: 89 percent / p-toluenesulfonic acid / toluene / 30 h / Heating View Scheme

1: 55 percent / potassium hydroxide / benzene; methanol / 0.58 h 2: 76 percent / p-toluenesulfonic acid / toluene / 2 h / Heating View Scheme

1: 30 percent / dicyclohexylcarbodiimide / CH2Cl2 / 16 h / Ambient temperature 2: 86 percent / Br2 / benzene / 2 h / Ambient temperature 3: 55 percent / potassium hydroxide / benzene; methanol / 0.58 h 4: 76 percent / p-toluenesulfonic acid / toluene / 2 h / Heating View Scheme