1: EtONa/EtOH / 1 h / Heating 2: 100 percent / NaBH4 / ethanol / 0.5 h / 0 °C 3: LiAlH4 / tetrahydrofuran / 0.5 h / -5 °C 4: dioxane; H2O / 0.5 h View Scheme

1: NaOEt / ethanol / 3 h / Heating 2: 95 percent / NaBH4 / ethanol / 0.5 h / 0 °C View Scheme

1: EtONa/EtOH / 1 h / Heating 2: 100 percent / NaBH4 / ethanol / 0.5 h / 0 °C 3: LiAlH4 / tetrahydrofuran / 0.5 h / -5 °C 4: dioxane; H2O / 0.5 h 5: 85 percent / Et3N, pyridine-SO3, DMSO / 3 h / Ambient temperature 6: 88 percent / hydroxylamine hydrochloride, aq. NaHCO3 / ethanol; tetrahydrofuran / 1 h / 40 °C 7: 94 percent / AcCl, MeOH / 0.83 h / Ambient temperature 8: 85 percent / DBU / acetonitrile / 0.5 h / Ambient temperature View Scheme

sodium hydride in toluene 1.5 h; Reflux;

1: NaOEt / ethanol / 3 h / Heating 2: 95 percent / NaBH4 / ethanol / 0.5 h / 0 °C 3: LiAlH4 / tetrahydrofuran / -5 °C View Scheme