potassium fluoride; dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct in tetrahydrofuran Suzuki coupling; 1 h; Inert atmosphereReflux; regioselective reaction;

1: hydrobromic acid; bromine; aq. sodium nitrite / 0.25 h / 0 °C 2: 6 h / 140 °C View Scheme

T=140°C; 6 h;