5-[(5-Chloro-3-methyl-1-phenyl-1H-pyrazol-4-yl)methylene]-2-(4-nitrobenzoyl)-3-phenyl-2,5-dihydro-1,2,4-triazin-6(1H)-one

A novel 1,2,4-triazin-6-one derivative (2) was synthesized by the reaction of the oxazolone derivative 1 with 4-nitrobenzoic acid hydrazide in the presence of sodium acetate and glacial acetic acid. The title compound 2 was characterized on basis of IR, 1H-NMR, 13C-NMR and mass spectral data.

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