1.1: diisopropylamine; n-butyllithium / tetrahydrofuran; hexane / 1.5 h / -78 - 0 °C / |Inert atmosphere 1.2: 0.25 h / -78 °C / |Inert atmosphere 2.1: 2,6-dimethylpyridine / tetrahydrofuran / 0.5 h / -50 °C / |Inert atmosphere 3.1: oxalyl dichloride / dichloromethane; dimethyl sulfoxide / 1 h / -78 - -40 °C / |Inert atmosphere 3.2: 0 - 22 °C / |Inert atmosphere 4.1: sodium dihydrogen phosphate monohydrate; 2-methyl-but-2-ene; sodium chlorite / water; tert-butyl alcohol / 3 h / 22 °C / |Inert atmosphere 5.1: 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; 4-(N,N-dimethlyamino)pyridine / dichloromethane / 16 h / 22 °C / |Inert atmosphere 6.1: C52H67Cl2NOW / benzene; toluene / 2.5 h / 22 °C / 1 Torr / |Inert atmosphere; |Glovebox 7.1: pyridine hydrogenfluoride / tetrahydrofuran / 36 h / 22 °C / |Inert atmosphere View Scheme