1: With sodium hydroxide in methanol T=70°C; 2: With hydrogenchloride in methanol Heating;

1.1: NiCl2*6H2O; NaBH4 / methanol / 0 - 20 °C 2.1: aq. NaOH / methanol / 70 °C 2.2: aq. HCl / methanol / Heating View Scheme

1.1: NaOEt / ethanol / Heating 2.1: NaOEt / ethanol / 0.5 h / 60 °C 2.2: ethanol / Heating 3.1: NiCl2*6H2O; NaBH4 / methanol / 0 - 20 °C 4.1: aq. NaOH / methanol / 70 °C 4.2: aq. HCl / methanol / Heating View Scheme

1.1: NaOEt / ethanol / 0.5 h / 60 °C 1.2: ethanol / Heating 2.1: NiCl2*6H2O; NaBH4 / methanol / 0 - 20 °C 3.1: aq. NaOH / methanol / 70 °C 3.2: aq. HCl / methanol / Heating View Scheme