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Reagents and conditions: (a)390 [Cp*RhCl2]2 (5 mol %), CF3CO2Ag (30 mol %), Ag2O, Mg(OAc)2·4H2O, PivOH, DCE, 85 °C, under N2, 12 h; (b) phenyliodine(III) bis(trifluoroacetate), BF3·Et2O, DCM, N2, −40 °C, 2 h.
