1: lithium aluminium tetrahydride / 1,4-dioxane / 16 h / Reflux 2: carbon tetrabromide; triethylamine; triphenylphosphine / dichloromethane / 16 h / 0 - 20 °C 3: hydrogenchloride; water / tetrahydrofuran / 4 h / 20 °C View Scheme