Synthesis and anticonvulsant activity of 5-chloro-2(3H)-benzoxazolinone-3-acetyl-2-(o/p-substituted benzal) hydrazone derivatives

Arzneimittelforschung. 2008;58(11):537-42. doi: 10.1055/s-0031-1296554.


It is well known that some hydrazone derivatives of both 2-oxobenzoxazoline and 2-oxobenzothiazoline exhibit potent anticonvulsant activity. In order to investigate the effects of structural modifications on the biological properties, 14 new hydrazones of 5-chloro-2(3H)-benzox-azolinone-3-acetyl hydrazide were synthesized. The chemical structures of the synthesized compounds were established by IR, 1H-NMR spectral analyses and elementary analyses. The anticonvulsant activities of the title compounds were tested by the penthylenetetrazole induced seizure test. 5-Chloro-2(3H)-benz-oxazolinone-3-acetyl-2-(o-methoxy-benzaldehyde)-hydrazone 4d, 5-chloro-2(3H)-benzoxazolinone-3-acetyl-2-(o-methybenzaldehyde)-hydrazone 4g, 5-chloro-2(3H)-benzoxazolinone-3-acetyl-2-(p-methylbenzaldehyde)-hydrazone 4h, 5-chloro-2(3H)-benzoxazolino-ne-3-acetyl-2-(p-nitrobenzaldehyde)-hydrazone 4m, and 5-chloro-2(3H)-benzox-azolinone-3-acetyl-2-(p-dimethylaminobenzaldehyde)-hydrazone 4n were found more active than phenytoin (CAS 57-41-0) in the tests.

MeSH terms

  • Animals
  • Anticonvulsants / chemical synthesis*
  • Anticonvulsants / pharmacology*
  • Convulsants
  • Epilepsy / chemically induced
  • Epilepsy / prevention & control
  • Hydrazones / chemical synthesis*
  • Hydrazones / pharmacology*
  • Magnetic Resonance Spectroscopy
  • Male
  • Mice
  • Pentylenetetrazole
  • Phenytoin / pharmacology
  • Postural Balance / drug effects
  • Spectrophotometry, Infrared
  • Structure-Activity Relationship


  • Anticonvulsants
  • Convulsants
  • Hydrazones
  • Phenytoin
  • Pentylenetetrazole