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Synthesis of benzo[f]indole-4,9-dione derivatives 8–16.
Reagents and conditions: i) benzylamine, EtOH, reflux; ii) MeCHO or Me2CO, Mn(Ac)3, iii) NH2OHHCl, K2CO3, EtOH; iv) acetylacetone, CAN; v) NH2OR-HCl (R = H or Me), K2CO3, EtOH; vi) procainamide, TiCl4, CH2Cl2.
