1: [2,2']bipyridinyl; copper(I) bromide dimethylsulfide complex; oxygen / α,α,α-trifluorotoluene; dimethyl sulfoxide / 24 h / 80 °C / 760.05 Torr 2: hydrogenchloride; water / tetrahydrofuran / 14 h / 20 °C View Scheme