1.1: tin(IV) chloride / dichloromethane / 12 h / -65 °C / |Inert atmosphere 2.1: naphthalenyllithium / tetrahydrofuran / 0.5 h / -60 °C / |Inert atmosphere 2.2: 5 h / -20 - 20 °C / |Inert atmosphere 3.1: lithium aluminium tetrahydride / tetrahydrofuran / 0 - 20 °C / |Inert atmosphere View Scheme

1: tin(IV) chloride / dichloromethane / 12 h / -65 °C / |Inert atmosphere 2: diisobutylaluminium hydride / toluene / -78 - 0 °C / |Inert atmosphere View Scheme