Add time:08/27/2019         Source:sciencedirect.com

A series of 3-chloro-2-methylphenyl substituted semicarbazones (3–33) was synthesized and evaluated for anticonvulsant and CNS activities. After intraperitoneal injection to mice or rats, the semicarbazone derivatives were examined in the maximal electroshock seizure (MES), subcutaneous pentylenetetrazole (scPTZ), and subcutaneous strychnine (scSTY)-induced seizure and neurotoxicity screens. The aryl urea (1) and the semicarbazide (2) showed anticonvulsant activity in the MES and scPTZ screens with acute neurotoxicity, whereas the semicarbazone derivatives showed good anticonvulsant potency in the scSTY screen with moderate activity against MES and scPTZ screens. Compound 21 exhibited anticonvulsant potency against all the three screens with lesser neurotoxicity. Some titled compounds exhibited lesser CNS depression and neurotoxicity compared to phenytoin or carbamazepine as was evident from the CNS studies.

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