An interactive human carbonic Anhydrase-II (hCA-II) receptor - pharmacophore molecular model & anti-convulsant activity of the designed and synthesized 5-amino-1,3,4-thiadiazole-2-thiol conjugated imine derivatives

Abstract

New imines, derived from aromatic aldehyde, chalcones and 5-amino-1,3,4-thiadiazole-2-thiol exhibited promising anti-convulsant activity which is explained through chemo-biological interactions at receptor site producing the inhibition of human Carbonic Anhydrase-II enzyme (hCA-II) through the proposed pharmacophore model at molecular levels as basis for pharmacological activity. The compounds 5-{1-(4-Chlorophenyl)-3-[4-(methoxy-phenyl)-prop-2-en-1-ylidene]amino}-1,3,4-thiadiazole-2-thiol (2b), 5-{[1-(4-chloro-phenyl)]-3-[4-(dimethyl-amino-phenyl)-prop-2-en-1-ylidene]amino}-1,3,4-thiadiazole-2-thiol (2c) and 5-{[1-(4-chloro-phenyl)]-3-[(4-amino-phenyl)-prop-2-en-1-ylidene]amino}-1,3,4-thiadiazole-2-thiol (2f) showed 100% activity in comparison with standard Acetazolamide, a known anti-convulsant drug. The compounds 2c, 2f also passed the Rotarod and Ethanol Potentiation tests which further confirmed them to be safe in motor coordination activity and safe from generating neurological toxicity. © 2013 John Wiley & Sons A/S.