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Cyclocondensation of hydrazides, 3‐aminopyrazoles, 3‐amino‐1,2,4‐triazole, 2‐aminobenzoimidazole, pyrazole‐3‐diazonium salts, 1,2,4‐triazol‐3‐diazonium salt, or benzoimidazole‐2‐diazonium salt with sodium salt of 3‐hydroxy‐1‐(2‐naphthyl)prop‐2‐en‐1‐one gave 2‐pyridones, pyrazolo[1,5‐a]pyrimidines, triazolo[1,5‐a]pyrimidine, benzo[4,5]imidazo[1,2‐a]pyrimidine, (pyrazolo[5,1‐c][1,2,4]triazin‐3‐yl)‐methanone, [1,2,4]triazolo[5,1‐c][1,2,4]triazin‐3‐yl‐methanone, or benzo[4,5]imidazo[2,1‐c] [1,2,4]triazin‐3‐yl‐methanone derivatives, respectively, which will be tested for anti‐tumor and anti‐cancer activates. J. Heterocyclic Chem., (2010).