In the search for potent ligands at the benzodiazepine site on the GABAA receptor, new fluoro derivatives of the pyrazolo[5,1-c][1,2,4]benzotriazine system were synthesized to evaluate the importance of the introduction of a fluorine atom in this system. Biological and pharmacological studies indicate that the substitution at position 8 with a trifluoromethyl group confers pharmacological activity due to potential metabolic stability in comparison to inactive 8-methyl substituted analogues. In particular, the compound 3-(2-methoxybenzyloxycarbonyl)-8-trifluoromethylpyrazolo[5,1-c][1,2,4]benzotriazine 5-oxide (21) emerges because of its selective anxiolytic profile without side effects. An analysis of all the newly synthesized compounds in our pharmacophoric map confirms the essential interaction points for binding recognition and the important areas for affinitymodulation. The fluorine atomwas able to form a hydrogen bond interaction only when it is not in position 3.

New fluoro derivatives of the pyrazolo[5,1-c][1,2,4]benzotriazine 5-oxide system: evaluation of fluorine binding properties in the benzodiazepine site on gamma-aminobutyrric acid type A (GABAA) receptor. Design, synthesis, biological evaluation, and molecular modeling investigation / G. Guerrini; G. Ciciani; F. Bruni; S. Selleri; C. Guarino; F. Melani; M. Montali; S. Daniele; C. Martini; C. Ghelardini; M. Norcini; S. Ciattini; A. Costanzo. - In: JOURNAL OF MEDICINAL CHEMISTRY. - ISSN 1520-4804. - STAMPA. - 53:(2010), pp. 7532-7548. [10.1021/jm1001887]

New fluoro derivatives of the pyrazolo[5,1-c][1,2,4]benzotriazine 5-oxide system: evaluation of fluorine binding properties in the benzodiazepine site on gamma-aminobutyrric acid type A (GABAA) receptor. Design, synthesis, biological evaluation, and molecular modeling investigation.

GUERRINI, GABRIELLA;CICIANI, GIOVANNA;BRUNI, FABRIZIO;SELLERI, SILVIA;MELANI, FABRIZIO;GHELARDINI, CARLA;NORCINI, MONICA;CIATTINI, SAMUELE;COSTANZO, ANNARELLA
2010

Abstract

In the search for potent ligands at the benzodiazepine site on the GABAA receptor, new fluoro derivatives of the pyrazolo[5,1-c][1,2,4]benzotriazine system were synthesized to evaluate the importance of the introduction of a fluorine atom in this system. Biological and pharmacological studies indicate that the substitution at position 8 with a trifluoromethyl group confers pharmacological activity due to potential metabolic stability in comparison to inactive 8-methyl substituted analogues. In particular, the compound 3-(2-methoxybenzyloxycarbonyl)-8-trifluoromethylpyrazolo[5,1-c][1,2,4]benzotriazine 5-oxide (21) emerges because of its selective anxiolytic profile without side effects. An analysis of all the newly synthesized compounds in our pharmacophoric map confirms the essential interaction points for binding recognition and the important areas for affinitymodulation. The fluorine atomwas able to form a hydrogen bond interaction only when it is not in position 3.
53
7532
7548
G. Guerrini; G. Ciciani; F. Bruni; S. Selleri; C. Guarino; F. Melani; M. Montali; S. Daniele; C. Martini; C. Ghelardini; M. Norcini; S. Ciattini; A. Costanzo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2158/395326
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