Synthesis and pharmacological evaluation of pyrazoline derivatives as new anti-inflammatory and analgesic agents.

A series of 3-(4-biphenyl)-5-substituted phenyl-2-pyrazolines (2a-h) and 1-benzoyl-3-(4-biphenyl)-5-substituted phenyl-2-pyrazolines (3a-h) were synthesized by condensation of chalcones with hydrazine hydrate in solvent system ethanol and DMF. The newly synthesized compounds were screened for their anti-inflammatory and analgesic activity, and were compared with standard drug. Among the compounds studied, compound 2e showed more potent anti-inflammatory and analgesic activity than the standard drug, along with minimum ulcerogenic index.