1.1: triethylamine; lithium hexamethyldisilazane / toluene / 2.83 h / -60 °C / Inert atmosphere 1.2: 0.17 h 1.3: Cooling with ice 2.1: hydrogen / 5 palladium on charcoal / methanol / 18 h / 20 °C / 3000.3 Torr 3.1: thionyl chloride / toluene / 4 h / 90 °C 4.1: triethylamine / dichloromethane / 0.83 h / 20 °C / Cooling with ice 5.1: sodium bis(2-methoxyethoxy)aluminium dihydride / toluene / 1 h / Inert atmosphere; Reflux 5.2: 0.5 h / 20 °C / Cooling with ice View Scheme