sulfuric acid

sodium hydroxide in ethanol 7 h; Heating;

1: 99 percent / bromine / diethyl ether / -5 °C 2: 85 percent / hydroquinone, Et3N / CH2Cl2 / -35 °C 3: 94 percent / hydroxylamine hydrochloride / CHCl3; H2O / 36 h / Ambient temperature 4: 78 percent / Na2CO3 / various solvent(s) / 144 h / Ambient temperature 5: 68 percent / H2, 2 N HCl / Raney nickel / methanol; H2O / 3.5 h / Ambient temperature 6: 70 percent / 0.5 N NaOH / ethanol / 7 h / Heating View Scheme

1: 85 percent / hydroquinone, Et3N / CH2Cl2 / -35 °C 2: 94 percent / hydroxylamine hydrochloride / CHCl3; H2O / 36 h / Ambient temperature 3: 78 percent / Na2CO3 / various solvent(s) / 144 h / Ambient temperature 4: 68 percent / H2, 2 N HCl / Raney nickel / methanol; H2O / 3.5 h / Ambient temperature 5: 70 percent / 0.5 N NaOH / ethanol / 7 h / Heating View Scheme

1: 94 percent / hydroxylamine hydrochloride / CHCl3; H2O / 36 h / Ambient temperature 2: 78 percent / Na2CO3 / various solvent(s) / 144 h / Ambient temperature 3: 68 percent / H2, 2 N HCl / Raney nickel / methanol; H2O / 3.5 h / Ambient temperature 4: 70 percent / 0.5 N NaOH / ethanol / 7 h / Heating View Scheme

1: 68 percent / H2, 2 N HCl / Raney nickel / methanol; H2O / 3.5 h / Ambient temperature 2: 70 percent / 0.5 N NaOH / ethanol / 7 h / Heating View Scheme

1: 78 percent / Na2CO3 / various solvent(s) / 144 h / Ambient temperature 2: 68 percent / H2, 2 N HCl / Raney nickel / methanol; H2O / 3.5 h / Ambient temperature 3: 70 percent / 0.5 N NaOH / ethanol / 7 h / Heating View Scheme

oxygen in ethyl acetate 20 h; Irradiation;

1: diethyl ether; toluene; tetrahydrofuran / 0.33 h / -75 °C 2: aq. potassium hydroxide / 3 h / Heating View Scheme

potassium hydroxide