Synthesis, in Vivo Evaluation, and Molecular Modeling Studies of New Pyrazolo[5,1-<i>c</i>][1,2,4]benzotriazine 5-Oxide Derivatives. Identification of a Bifunctional Hydrogen Bond Area Related to the Inverse Agonism
作者:Gabriella Guerrini、Giovanna Ciciani、Giovanni Cambi、Fabrizio Bruni、Silvia Selleri、Chiara Guarino、Fabrizio Melani、Marina Montali、Claudia Martini、Carla Ghelardini、Monica Norcini、Annarella Costanzo
DOI:10.1021/jm801599a
日期:2009.8.13
A new series of pyrazolo[5,1-c-][1,2,4]benzotriazine 5-oxide 8-alkyloxy-/aryloxy-/arylalkyloxy and 8-aryl-/arylalkylderivatives variously substituted at the 3-position were synthesized and binding studies at the benzodiazepine site on GABA(A) receptor were carried out. The pharmacological profile was identified for compounds 10, 11, 16(+), 16(-), and 17 by considering six potential benzodiazepine actions: motor coordination, anticonvulsant action, spontaneous motility and explorative activity, potential anxiolytic-like effects, mouse learning and memory modulation., and finally, ethanol-potentiating action. Compound 17 stands out as the compound that improves mouse memory processes selectively, safely, and in a statistically significant manner. From a ligand-based pharmacophoric model, we identified a hydrogen bond interaction area HBp-3 near the lipophilic area. This new pharmacophoric model allowed us to identify four structural compound typologics and thus to rationalize the affinity data of all compounds.