1.1: oxalyl dichloride; dimethyl sulfoxide / dichloromethane / 0.42 h / -78 °C / |Inert atmosphere 1.2: 0.25 h / -78 °C / |Inert atmosphere 2.1: potassium fluoride / isopropyl alcohol / 8 h / 0 - 20 °C 3.1: 4-(N,N-dimethlyamino)pyridine / diethyl ether / 2 h / 25 °C / |Inert atmosphere 4.1: sodium tetrahydroborate / ethanol / 2 h / 0 °C / |Inert atmosphere 5.1: sodium nitrite; acetic acid / dimethyl sulfoxide / 20 h / 40 °C / |Inert atmosphere View Scheme

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katalytische Hydrogenolyse;