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Synthesis pathways for preparation of triazine-hydrazone derivatives. Reagents and conditions: (A) thiamine hydrochloride, NaOH, EtOH, reflux, 3 h; (B) HNO3, 60 °C; (C) thiosemicarbazide, CH3COOH, reflux, 3 h; (D) CH3I, NaOH, EtOH, 2 h, rt; (E) NH2NH2.H2O, EtOH, reflux, 12 h; (F) ArCHO, EtOH, 1–10 h, rt.
