1: AlCl3, aluminium chloride / dichloromethane / 4 h / 3 - 8 °C 2: Pearlman's catalist; sulfuric acid; hydrogen; trifluoroacetic acid / 24 h / 20 °C / 5171.62 Torr 3: water; potassium hydroxide / methanol / 24 h / Reflux 4: bromine / water / 2 h / 0 - 5 °C View Scheme

1: AlCl3, aluminium chloride / dichloromethane / 4 h / 3 - 8 °C 2: Pearlman's catalist; sulfuric acid; hydrogen; trifluoroacetic acid / 24 h / 20 °C / 5171.62 Torr 3: water; potassium hydroxide / methanol / 24 h / Reflux 4: ethanol; water / 1 h / 20 °C 5: acetic acid / 2 - 4 h / 100 °C 6: sodium tetrahydroborate / dichloromethane; water; isopropyl alcohol / 16 h / 20 - 25 °C View Scheme