Quinazolino-benzothiazoles: fused pharmacophores as anticonvulsant agents.

A series of 6-bromo-2-ethyl-3-(substitutedbenzo[d]thiazol-2-yl)quinazolin-4(3H)-one 3 (a-j) were synthesized using appropriate synthetic route and evaluated experimentally by the Maximal Electro Shock (MES) and the PTZ-induced seizure methods. Among the tested compounds, 3-(benzo[d]thiazol-2-yl)-6-bromo-2-ethylquinazolin-4(3H)-one (3a) has shown significant activity against tonic seizure by the MES model and 6-bromo-2-ethyl-3-(6-methoxybenzo[d]thiazol-2-yl)quinazolin-4(3H)-one (3h) against clonic seizure by PTZ-induced seizure model. Not one of the selected compounds demonstrated any sign of neurotoxicity and hepatotoxicity.