1: N-bromosuccinmide; silver nitrate / acetone / 1 h / 20 °C / |Inert atmosphere 2: 1,10-phenanthroline; potassium carbonate; CuSO4‵5H2O / toluene / 80 °C / |Inert atmosphere; |Sealed tube 3: zinc trifluoromethanesulfonate / 1,2-dichloro-ethane / 2 h / 60 °C / |Inert atmosphere View Scheme