1: With lithium aluminium tetrahydride in tetrahydrofuran T=60°C; 3 h; Inert atmosphereCooling with ice; 2: With water; acetic acid in tetrahydrofuran Cooling with ice; 3: With sodium hydrogencarbonate in tetrahydrofuran; water; ethyl acetate

1.1: ethanol; water / 4 h / Inert atmosphere; Reflux 2.1: lithium aluminium tetrahydride / tetrahydrofuran / 3 h / 60 °C / Inert atmosphere; Cooling with ice 2.2: Cooling with ice View Scheme

1.1: thionyl chloride / chloroform / 3 h / 20 °C / Inert atmosphere 2.1: ethanol; water / 4 h / Inert atmosphere; Reflux 3.1: lithium aluminium tetrahydride / tetrahydrofuran / 3 h / 60 °C / Inert atmosphere; Cooling with ice 3.2: Cooling with ice View Scheme

1.1: thionyl chloride / 2.5 h / Inert atmosphere; Reflux 2.1: sodium tetrahydroborate / methanol / 3.5 h / Inert atmosphere; Reflux 2.2: 20 °C 3.1: thionyl chloride / chloroform / 3 h / 20 °C / Inert atmosphere 4.1: ethanol; water / 4 h / Inert atmosphere; Reflux 5.1: lithium aluminium tetrahydride / tetrahydrofuran / 3 h / 60 °C / Inert atmosphere; Cooling with ice 5.2: Cooling with ice View Scheme

1.1: sodium tetrahydroborate / methanol / 3.5 h / Inert atmosphere; Reflux 1.2: 20 °C 2.1: thionyl chloride / chloroform / 3 h / 20 °C / Inert atmosphere 3.1: ethanol; water / 4 h / Inert atmosphere; Reflux 4.1: lithium aluminium tetrahydride / tetrahydrofuran / 3 h / 60 °C / Inert atmosphere; Cooling with ice 4.2: Cooling with ice View Scheme