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Reagents and conditions: (a)506 Pd(PPh3)4 (5 mol %), t-BuOLi (2 equiv), K2CO3 (1 equiv), KOAc (1 equiv), dioxane, N2, 100 °C, 24 h; (b) FeCl3, DCM/MeNO2, 0 °C; (c) FeCl3, DCM/MeNO2, rt; (d) FeCl3, DCM/MeNO2, 0 °C, 15 min, then rt, 2.5 h; (e) (1) DDQ, DCM, 0 °C, 10 min, (2) TfOH, 10 min.
