Multi-step reaction with 6 steps 1: N,N-dimethyl-formamide; toluene / 5 h / 110 °C2: palladium 10 on activated carbon; hydrogen / methanol / 14 h / 20 °C3: triethylamine; sodium iodide / 1,4-dioxane / 120 °C4: sodium nitrite / water; acetic acid; ethyl acetate5: N-ethyl-N,N-diisopropylamine / dichloromethane6: hydrogenchloride; water / methanol; water