1: 1) K2CO3 / 2) Pd(PPh3)4 / 1) EtOH, toluene, 0.5 h, 2) reflux, 48 h 2: 86 percent / pyridinium chloride / 0.25 h / 210 °C View Scheme

1: 78 percent / Pd(PPh3)4 / toluene / 60 h / Heating 2: 83 percent / pyridinium chloride / 0.25 h / 210 °C View Scheme