1: copper(l) iodide; bis-triphenylphosphine-palladium(II) chloride; triethylamine / N,N-dimethyl-formamide / 0.05 h / 130 °C 2: tetrabutyl ammonium fluoride / tetrahydrofuran / 1 h / 20 °C 3: cyclohexa-1,4-diene / N,N-dimethyl-formamide / 0.5 h / 240 °C / Microwave irradiation View Scheme