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Schematic representation for the synthesis of fused tetrazole derivatives. Reagents and conditions: (i) NaN3, DMF, NH4Cl, 120°C, 7 h; (ii) CS2, pyridine, reflux, 10 h; (iii) conc. HCl, benzaldehyde, MeOH, reflux, 16 h; (iv) 4-methoxyphenacyl bromide, EtOH, AcONa, reflux, 16 h.
