1: copper(l) iodide; bis-triphenylphosphine-palladium(II) chloride; triethylamine / 1,4-dioxane / 2 h / 20 °C / Inert atmosphere 2: hydrazine monohydrochloride; water; toluene-4-sulfonic acid / 1,4-dioxane / 0.25 h / 80 °C / Inert atmosphere View Scheme