1: sodium tetrahydroborate / tetrahydrofuran; water / 2 h / 0 °C 2: sodium tetrahydroborate; NiII chloride hexahydrate / methanol / 1.5 h / 0 °C / |Inert atmosphere 3: triethylamine / 20 °C 4: triethylamine / dichloromethane / 14 h / 0 °C / |Reflux 5: 1,8-diazabicyclo[5.4.0]undec-7-ene / acetonitrile / 24 h / 20 °C / |Reflux 6: sodium hydride / tetrahydrofuran / 0 - 20 °C 7: 3-chloro-benzenecarboperoxoic acid; sodium hydrogencarbonate / dichloromethane / 2 h / 0 - 20 °C 8: lithium aluminium tetrahydride / tetrahydrofuran / 5 h / 0 °C / |Reflux View Scheme