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Synthesis of 3-substituted-indole derivatives. Reagents and conditions: (a) Arylboronic acid, K2CO3, Pd(Pφ3)4, benzene/EtOH, reflux, 16 h; (b) Mg, NH4Cl, MeOH/THF, rt, 2 h; (c) 1,4-dibromobutane, KOH, TBAI, DMF, 0°C→rt, 2 h; (d) Cyclic amine, K2CO3, DMF, 60°C, 2 h.
