1: 1.6 g / potassium persulphate, aq. sodium hydroxide / neat (no solvent) / 48 h / 15 - 20 °C / 1.) addition during 2 h, 15 - 20 deg C, 2.) 48 h 2: 0.15 g / anhydrous K2CO3 / acetone / 5 h / Heating 3: 0.45 g / DDQ / benzene / 60 h / Heating View Scheme

1: 1.6 g / potassium persulphate, aq. sodium hydroxide / neat (no solvent) / 48 h / 15 - 20 °C / 1.) addition during 2 h, 15 - 20 deg C, 2.) 48 h 2: 0.15 g / anhydrous K2CO3 / acetone / 5 h / Heating 3: 0.45 g / DDQ / benzene / 60 h / Heating 4: 0.1 g / anhydrous K2CO3 / acetone / 4 h / Heating View Scheme

potassium hydroxide in ethanol 24 h; Microwave irradiation; Reagent/catalystTime;