1: nitric acid / acetic acid / 20 - 105 °C / |Inert atmosphere 2: methylamine / isopropyl alcohol; water / 2 h / 60 - 65 °C 3: sodium tetrahydroborate / isopropyl alcohol; water / 20 °C View Scheme

1: nitric acid / acetic acid / 20 - 105 °C / |Inert atmosphere 2: methylamine / isopropyl alcohol; water / 2 h / 60 - 65 °C 3: ethanol / 20 - 65 °C 4: hydrogen; palladium 10 on activated carbon; triethylamine / methanol / 25 - 30 °C / 2250.23 - 3000.3 Torr / |Inert atmosphere; |Autoclave View Scheme

1: nitric acid / acetic acid / 20 - 105 °C / |Inert atmosphere 2: methylamine / isopropyl alcohol; water / 2 h / 60 - 65 °C View Scheme