Synthesis and Biological Evaluation of Some New Hydrazone Derivatives Bearing Pyrimidine Ring as Analgesic and Anti-Inflammatory Agents

New hydrazone derivatives were synthesized from 4-chloro-2-(methylthio)pyrimidine-5-carbohydrazide. Synthesized compounds were characterized by IR, 1H-NMR, 13C-NMR, mass spectral data and elemental analysis. All compounds were investigated for analgesic and anti-inflammatory activity with hot plate test and biochemical assay, respectively. The results of anti-inflammatory activity showed that compound 2t had maximal Lipoxygenase (LOX) inhibition (66.30%) whereas inhibitions of 2a, 2c, 2i, 2k, 2l, 2m, 2p, 2s and 2u were observed between approximately 45-15 %. Our results also indicated that 15 compounds of 21 had analgesic effect in hot plate test. Analgesic effect of 2l, 2s, 2t began earlier than others while effect of 2i began at latest time. According to the activity results, compound 2t have significant analgesic and anti-inflammatory effects.