sodium hydroxide; dihydrogen peroxide in water T=35°C; 16 h;

1: 66 percent / conc. H2SO4 / dimethylsulfoxide / 5 h / 70 °C 2: 83 percent / sodium carbonate, hydroxylamine hydrochloride / ethanol; H2O / 1.5 h / Heating 3: 49 percent / neutral aluminium oxide / toluene / 50 h / Heating View Scheme

in acetonitrile Heating;

sulfuric acid in dimethyl sulfoxide T=70°C; 5 h;