1.1: triphenylphosphine / tetrahydrofuran / 1 h / 20 °C / |Inert atmosphere 1.2: 0.42 h / 20 °C / |Inert atmosphere; |Sonication 2.1: triphenylphosphine; gold(III) chloride; silver trifluoromethanesulfonate / dichloromethane / 7 h / 20 - 50 °C / |Inert atmosphere 3.1: hydrogen; palladium on activated charcoal / methanol / 5 h / 20 °C 4.1: lithium aluminium tetrahydride / tetrahydrofuran / 2.5 h / -78 - 20 °C / |Inert atmosphere View Scheme

1.1: triphenylphosphine / tetrahydrofuran / 1 h / 20 °C / |Inert atmosphere 1.2: 0.42 h / 20 °C / |Inert atmosphere; |Sonication 2.1: triphenylphosphine; gold(III) chloride; silver trifluoromethanesulfonate / dichloromethane / 7 h / 20 - 50 °C / |Inert atmosphere 3.1: Dess-Martin periodane / dichloromethane / 2 h / 0 - 20 °C / |Inert atmosphere 4.1: L-Selectridereg; / tetrahydrofuran / 4 h / -78 °C / |Inert atmosphere 5.1: hydrogen; palladium on activated charcoal / methanol / 3 h / 20 °C 6.1: lithium aluminium tetrahydride / tetrahydrofuran / 2.5 h / -78 - 20 °C / |Inert atmosphere View Scheme

1.1: triphenylphosphine / tetrahydrofuran / 1 h / 20 °C / |Inert atmosphere 1.2: 0.42 h / 20 °C / |Inert atmosphere; |Sonication 2.1: triphenylphosphine; gold(III) chloride; silver trifluoromethanesulfonate / dichloromethane / 7 h / 20 - 50 °C / |Inert atmosphere 3.1: hydrogen; palladium on activated charcoal / methanol / 5 h / 20 °C 4.1: lithium aluminium tetrahydride / tetrahydrofuran / 2.5 h / -78 - 20 °C / |Inert atmosphere View Scheme