1: AlCl3, aluminium chloride / dichloromethane / 15 - 20 °C 2: triethylamine / dichloromethane / 2 h / 25 - 30 °C 3: sodium tetrahydroborate / methanol / 0.5 h / 0 - 5 °C 4: hydrogenchloride / methanol; water / 5 h / 90 - 95 °C View Scheme

1: AlCl3, aluminium chloride / dichloromethane / 15 - 20 °C 2: triethylamine / dichloromethane / 2 h / 25 - 30 °C 3: sodium tetrahydroborate / methanol / 0.5 h / 0 - 5 °C 4: hydrogenchloride / methanol; water / 5 h / 90 - 95 °C 5: AlCl3, aluminium chloride / dichloromethane / 5.08 h / 0 - 30 °C 6: AlCl3, aluminium chloride / chlorobenzene / 5.17 h / 20 - 80 °C View Scheme

1: AlCl3, aluminium chloride / dichloromethane / 15 - 20 °C 2: triethylamine / dichloromethane / 2 h / 25 - 30 °C 3: sodium tetrahydroborate / methanol / 0.5 h / 0 - 5 °C 4: hydrogenchloride / methanol; water / 5 h / 90 - 95 °C 5: AlCl3, aluminium chloride / dichloromethane / 5.08 h / 0 - 30 °C View Scheme