4-Diazinyl- and 4-Pyridinylimidazoles: Potent Angiotensin II Antagonists. A Study of Their Activity and Computational Characterization
| Autor: | Anna Rita Renzetti, Fabrizio Bonaccorsi, Spartaco Mauro Colombani, C. Ghio, R. Giorgi, Nicholas J. S. Harmat, G. Alagona, Rocco Cirillo, Guido Cerbai, Alessandro Subissi |
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| Rok vydání: | 1995 |
| Předmět: |
Male
Chemical Phenomena Molecular model Stereochemistry Administration Oral Ring (chemistry) Chemical synthesis Nitrone Rats Sprague-Dawley Angiotensin Receptor Antagonists Structure-Activity Relationship chemistry.chemical_compound Drug Discovery Pyridine Animals Imidazole Diazine chemistry.chemical_classification Binding Sites Chemistry Physical Imidazoles Angiotensin II Rats Kinetics chemistry Molecular Medicine |
| Zdroj: | Journal of Medicinal Chemistry. 38:2925-2937 |
| ISSN: | 1520-4804 0022-2623 |
| DOI: | 10.1021/jm00015a015 |
| Popis: | A series of N-[biphenylyl(tetrazolyl)methyl]-2-butylimidazoles containing variously substituted diazine or pyridine moieties either as their free bases or N-oxide derivatives attached to the 4-position of the imidazole ring was synthesized and tested for interaction with the AT1 receptors of rat adrenal cortex membranes (receptor binding assay). Some compounds were then chosen for further evaluation in vivo in the A II-induced pressor response in conscious normotensive rats. The most potent in the AT1 binding assay were found to be compounds in which the diazine or pyridine ring nitrogen is adjacent to the point of attachment between the two heteroaromatic rings such as 2-butyl-4-(3,6-dimethylpyrazin-2-yl)-1-[[2'-(1H-tetrazol-5-y l)-biphenyl-4- yl]methyl]-1H-imidazole (3b) or 2-butyl-4-[5-(methoxycarbonyl)pyrid-2-yl]-1-[[2'-(1H-tetrazol++ +-5- yl)biphenyl-4-yl]methyl]-1H-imidazole (6c). The binding affinities and oral activities of the pyridine N-oxide imidazoles in which a stabilizing group ortho to the pyridine ring nitrogen is present were markedly improved as in 2-butyl-4-[(3-methoxycarbonyl)-6-methyl-N-oxopyridin-2-yl]-1-[[2'- (1H- tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-imidazole 31b. Molecular modeling studies were carried out to determine the molecular electrostatic potential values of related model systems and to correlate their receptor interaction energies with the observed activities of our compounds. |
| Databáze: | OpenAIRE |
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