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Reagents and conditions: (a)429 phenylboronic acid, Pd(PPh3)4, K2CO3, THF/H2O (1:1), reflux, 3 days; (b) Zn, acetic acid, 40 °C, 22 h; (c) 2,2-diphenylacetic acid, 180 °C, 62 h; (d) BBr3, o-dichlorobenzene, reflux, 16 h.
