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Reagents and Conditions: (a) Cs2CO3 (5 equiv), DMF, 40 °C, 22 h (95%); (b) PhI(OAc)2 (6 equiv), I2 (6 equiv), DCE, 90-W sunlamp, 23 °C, 1 h (32: 56%)(33: 14%); (c) Pd(OAc)2 (5 mol %), PhI(OAc)2 (2 equiv), toluene/acetonitrile (9:1), 80 °C, 14 h (ca. 60%).
