[BMIm][HSO4] 0.025 h; microwave irradiation;

1.1: 81 percent / hydrochloric acid; sodium chloride / CH2Cl2; H2O / Electrolysis 2.1: 81 percent / p-toluenesulfonic acid / CH2Cl2 3.1: 74 percent / sodium iodide / acetone / Heating 4.1: naphthalene; sodium / tetrahydrofuran / 20 °C 4.2: 45 percent / tetrahydrofuran / 20 h / Heating 5.1: m-chloroperbenzoic acid / CH2Cl2 / 0.5 h / cooling 5.2: CDCl3 View Scheme

1.1: 81 percent / p-toluenesulfonic acid / CH2Cl2 2.1: 74 percent / sodium iodide / acetone / Heating 3.1: naphthalene; sodium / tetrahydrofuran / 20 °C 3.2: 45 percent / tetrahydrofuran / 20 h / Heating 4.1: m-chloroperbenzoic acid / CH2Cl2 / 0.5 h / cooling 4.2: CDCl3 View Scheme

1.1: 74 percent / sodium iodide / acetone / Heating 2.1: naphthalene; sodium / tetrahydrofuran / 20 °C 2.2: 45 percent / tetrahydrofuran / 20 h / Heating 3.1: m-chloroperbenzoic acid / CH2Cl2 / 0.5 h / cooling 3.2: CDCl3 View Scheme