Polysubstituted pyrazoles, Part 4: Synthesis, antimicrobial and antiinflammatory activity of some pyrazoles.

As a continuation of an earlier interest in polysubstituted pyrazoles, the synthesis of some derivatives of 1H-pyrazol-4-yl-2-oxo-but-3-enoic acid and ethyl 4-hydroxy-1H-pyrazole-3-carboxylates of potential antimicrobial and antiinflammatory activity is described. One compound showed in vitro antibacterial activity and two compounds displayed in vivo antiinflammatory potency in rats.