1.1: pyridine / dichloromethane; toluene / 1 h / -78 - 20 °C / Inert atmosphere 2.1: boron tribromide / dichloromethane / 0.5 h / 20 °C / Inert atmosphere 3.1: sodium hydride / tetrahydrofuran / 0.5 h / 0 °C / Inert atmosphere 3.2: 1 h / Inert atmosphere 4.1: sodium hydroxide / 1,4-dioxane; water / 2 h / 60 °C 5.1: sodium periodate / methanol / 0.75 h / Cooling with ice 6.1: carbon tetrabromide; potassium carbonate; triphenylphosphine / dichloromethane / 0.25 h / 10 °C / Inert atmosphere 7.1: palladium 10 on activated carbon; hydrogen / methanol / 2 h / 20 °C / 3102.97 Torr / Inert atmosphere View Scheme