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Reagents and conditions: (a)702,704 (1) pentafluorobenzaldehyde, BF3·OEt2, DCM, rt, (2) DDQ, rt; (b) Cu(OAc)2·H2O (73.8 equiv), CHCl3, reflux, 48 h; (c)702,703 Pd(PhCN)2Cl2 (3 equiv for 366.5; 2 equiv for 366.6; 15 equiv for 366.7), PhCN, 180 °C.
