T=105°C; im Rohr;

aluminum oxide in toluene 50 h; Heating;

P2O5 durch Destillation im Vakuum;

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

1: 83 percent / sodium carbonate, hydroxylamine hydrochloride / ethanol; H2O / 1.5 h / Heating 2: 49 percent / neutral aluminium oxide / toluene / 50 h / Heating View Scheme