1: potassium fluoride; sodium bromide / tetrakis(triphenylphosphine) palladium(0) / toluene; water / 18 h / 100 °C / Inert atmosphere 2: hydrogenchloride; hydrogen / palladium 10 on activated carbon / ethyl acetate; water / 16 h / 21 °C 3: triethylamine / dichloromethane / 2 h / 0 °C / Cooling with ice 4: potassium hydroxide; water / ethanol / 1 h / Reflux View Scheme