triethylamine in benzene 5 h; Ambient temperature;

hydrogen; palladium on activated charcoal in ethanol Ambient temperatureatmospheric pressure;

lithium aluminium tetrahydride in diethyl ether Heating;

1: 98 percent / H2 / 10percent Pd/C / ethanol / Ambient temperature; atmospheric pressure 2: 91 percent / LiAlH4 / dioxane / 5 h / Heating 3: 43 percent / 0.5 h / 145 °C View Scheme

1: 98 percent / H2 / 10percent Pd/C / ethanol / Ambient temperature; atmospheric pressure 2: 91 percent / LiAlH4 / dioxane / 5 h / Heating 3: 43 percent / 0.5 h / 145 °C 4: 95 percent / KOH / methanol; H2O / 1 h / Heating 5: hydrazine monohydrate / ethanol / 3 h / Heating View Scheme