1: 1.5 h / 160 °C / Inert atmosphere; Neat (no solvent) 2: thionyl chloride / 2.5 h / 70 °C / Inert atmosphere 3: AlCl3, aluminium chloride / dichloromethane / -78 - 20 °C / Inert atmosphere 4: lithium aluminium tetrahydride / tetrahydrofuran / 0 - 20 °C / Inert atmosphere View Scheme

1: AlCl3, aluminium chloride / dichloromethane / -78 - 20 °C / Inert atmosphere 2: lithium aluminium tetrahydride / tetrahydrofuran / 0 - 20 °C / Inert atmosphere View Scheme

1.1: potassium hydroxide / methanol / 18 h / 65 °C / Inert atmosphere 1.2: 0 °C / Inert atmosphere 2.1: 1.5 h / 160 °C / Inert atmosphere; Neat (no solvent) 3.1: thionyl chloride / 2.5 h / 70 °C / Inert atmosphere 4.1: AlCl3, aluminium chloride / dichloromethane / -78 - 20 °C / Inert atmosphere 5.1: lithium aluminium tetrahydride / tetrahydrofuran / 0 - 20 °C / Inert atmosphere View Scheme

1.1: sodium hydride / tetrahydrofuran; mineral oil / 0.5 h / 0 °C / Inert atmosphere 1.2: 2 h / 20 °C / Inert atmosphere 2.1: potassium hydroxide / methanol / 18 h / 65 °C / Inert atmosphere 2.2: 0 °C / Inert atmosphere 3.1: 1.5 h / 160 °C / Inert atmosphere; Neat (no solvent) 4.1: thionyl chloride / 2.5 h / 70 °C / Inert atmosphere 5.1: AlCl3, aluminium chloride / dichloromethane / -78 - 20 °C / Inert atmosphere 6.1: lithium aluminium tetrahydride / tetrahydrofuran / 0 - 20 °C / Inert atmosphere View Scheme

1.1: N-bromosuccinmide; 2,2'-azo-bisisobutyronitrile / benzene / 80 °C / Inert atmosphere; Darkness 2.1: sodium hydride / tetrahydrofuran; mineral oil / 0.5 h / 0 °C / Inert atmosphere 2.2: 2 h / 20 °C / Inert atmosphere 3.1: potassium hydroxide / methanol / 18 h / 65 °C / Inert atmosphere 3.2: 0 °C / Inert atmosphere 4.1: 1.5 h / 160 °C / Inert atmosphere; Neat (no solvent) 5.1: thionyl chloride / 2.5 h / 70 °C / Inert atmosphere 6.1: AlCl3, aluminium chloride / dichloromethane / -78 - 20 °C / Inert atmosphere 7.1: lithium aluminium tetrahydride / tetrahydrofuran / 0 - 20 °C / Inert atmosphere View Scheme

1: 68 percent / acetic anhydride / 11 h / 90 °C 2: 0.67 h / 860 °C / 0.07 Torr / flash vacuum pyrolysis View Scheme

oxalic acid

1: aq. H2SO4 / Heating 2: Al2O3-Cr2O3-MgO / 400 °C View Scheme

1: EtMgBr 2: aq. H2SO4 / Heating 3: Al2O3-Cr2O3-MgO / 400 °C View Scheme

1: 200 °C 2: LiAlH4 3: oxalic acid View Scheme