1: 90 percent / 4N HCl / tetrahydrofuran / 3 h / Heating 2: 82 percent / 2,6-lutidine / CH2Cl2 / 1 h / -30 - 0 °C 3: 72 percent / LiCl, DBU / bis(triphenylphosphine)palladium(II) chloride / dimethylformamide / 8 h / 140 °C View Scheme