chromium(VI) oxide; sulfuric acid in water; acetic acid; acetone T=0°C; 5 h;

hydrogenchloride in water T=40°C; 40 h;

hydrogenchloride in water T=40°C; 40 h;

1: 73 percent / potassium hydroxide / ethanol / 48 h / Heating 2: 53 percent / chromic trioxide, H2SO4 / acetone; acetic acid; H2O / 5 h / 0 °C View Scheme

1: triethylamine / dichloromethane / 15 h / 20 °C 2: lithium aluminium tetrahydride; AlCl3, aluminium chloride / diethyl ether / 2 h / 0 °C 3: 4-(N,N-dimethlyamino)pyridine; triethylamine / dichloromethane / 3 h / 0 °C 4: lithium bromide / acetonitrile / 15 h / 20 °C 5: sodium hydride / dimethyl sulfoxide; mineral oil / 15 h / 150 °C 6: hydrogenchloride / water / 40 h / 40 °C View Scheme