1: pyridine; trichlorophosphate / toluene / 4.75 h / 70 °C 2: ammonium formate; zinc / methanol; isopropyl alcohol / 0.33 h 3: hydrogen / 11 h / 20 °C 4: triethylamine; sodium iodide / 1,4-dioxane / 7 h / 120 °C 5: sodium nitrite / water; acetic acid; ethyl acetate / 30 °C 6: N-ethyl-N,N-diisopropylamine / dichloromethane / 16 h 7: hydrogenchloride; water / methanol / 1 h View Scheme

1: pyridine; trichlorophosphate / toluene / 4.75 h / 70 °C 2: ammonium formate; zinc / methanol; isopropyl alcohol / 0.33 h 3: hydrogen / 11 h / 20 °C View Scheme