1: hydrogen; palladium on activated charcoal / methanol / 5 h / 20 °C 2: lithium aluminium tetrahydride / tetrahydrofuran / 2.5 h / -78 - 20 °C / |Inert atmosphere View Scheme

1: Dess-Martin periodane / dichloromethane / 2 h / 0 - 20 °C / |Inert atmosphere 2: L-Selectridereg; / tetrahydrofuran / 4 h / -78 °C / |Inert atmosphere 3: hydrogen; palladium on activated charcoal / methanol / 3 h / 20 °C 4: lithium aluminium tetrahydride / tetrahydrofuran / 2.5 h / -78 - 20 °C / |Inert atmosphere View Scheme

1: hydrogen; palladium on activated charcoal / methanol / 5 h / 20 °C 2: lithium aluminium tetrahydride / tetrahydrofuran / 2.5 h / -78 - 20 °C / |Inert atmosphere View Scheme