Anticonvulsant Activities of 4-benzylidene-6-(4-methyl-phenyl)-4,5-dihydropyridazin-(2H)-ones and 4-benzylidene-6-(4-chloro-phenyl)-4,5-dihydropyridazin-(2H)-ones

Mohammad Asif1, *, Anita Singh2
1 Department of Pharmacy, GRD (P.G) Institute of Management and Technology, Dehradun, 2480009, India
2 Department of Pharmaceutical Sciences, Kumaun University Campus, Bhimtal, Nainital, India

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© Asif and Singh; Licensee Bentham Open

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (, which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Department of Pharmacy, GRD (P.G) Institute of Management and Technology, Dehradun, 2480009, India; Tel: +919897088910; E-mails:,



Two series of 4-benzylidene-6-(4-methyl-phenyl)-4,5-dihydropyridazin-(2H)-one compounds (3a-e) and 4-benzylidene-6-(4-chloro-phenyl)-4,5-dihydropyridazin-(2H)-ones (3f-j) were synthesized and evaluated as anticonvulsant agents.


Synthesized compounds (3a-3j) were tested against maximum electro shock (MES) and Isoniazid (INH) induced convulsion methods for anticonvulsant activities and neurotoxicity.


In MES induced convulsions, result found that the compounds 3e and 3j exhibited highest anticonvulsant activities. In INH induced convulsions, result was indicated that all the compounds exhibited good anticonvulsant activities., whereas compounds 3d and 3j showed maximum activity. Methyl derivatives were more active than chloro derivatives. Phenytoin sodium (25mg/kg) and sodium vaproate (50mg/kg) were used as reference drugs. All these synthesized pyridazinone compounds (3a-j) did not exhibit any neurotoxicity up to 100 mg/kg dose levels.


All compounds showed good anticonvulsant activities against both MES and INH induced convulsion models. Many such explorations are anticipated in the near future.

Keywords: Anticonvulsant, Isoniazid, Maximum electro shock, Pyridazinones, Synthesis.