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Reagents and conditions: (a)317 CHCl3, AcOH, reflux; (b) p-diiodobenzene, PdCl2(dppf), K3PO4, THF, H2O, 80 °C, 11 min, microwave heating; (c) m-diiodobenzene, PdCl2(dppf), K3PO4, THF, H2O, 80 °C, 11 min, microwave heating; (d) o-diiodobenzene, PdCl2(dppf), K3PO4, THF, H2O, 80 °C, 11 min, microwave heating.
