Triazolinones as nonpeptide angiotensin II antagonists. 1. Synthesis and evaluation of potent 2,4,5-trisubstituted triazolinones
| Autor: | Victor J. Lotti, Wallace T. Ashton, Flanagan Kl, R. S. L. Chang, William J. Greenlee, M. Maccoss, Tsing-Bau Chen, Robert A. Strelitz, Linda L. Chang, Kristie A. Faust |
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| Rok vydání: | 1993 |
| Předmět: |
Male
Binding Sites Angiotensin II receptor type 1 Trifluoromethyl Stereochemistry Angiotensin II Aryl Substituent Stereoisomerism Triazoles Muscle Smooth Vascular Rats Rats Sprague-Dawley Structure-Activity Relationship chemistry.chemical_compound chemistry Drug Discovery Animals Molecular Medicine Potency Structure–activity relationship Moiety Rabbits |
| Zdroj: | Journal of Medicinal Chemistry. 36:2558-2568 |
| ISSN: | 1520-4804 0022-2623 |
| Popis: | A series of 2,4-dihydro-2,4,5-trisubstituted-3H-1,2,4-triazol-3-ones was prepared via several synthetic routes and evaluated as AII receptor antagonists in vitro and in vivo. The preferred compounds contained a [2'-(5-tetrazolyl)biphenyl-4-yl]methyl side chain at N4 and an n-butyl group at C5. A number of these bearing an alkyl or aralkyl substituent at N2 showed in vitro potency in the nanomolar range (rabbit aorta membrane receptor), and several of these, e.g., the 2,2-dimethyl-1-propyl analogue (54, IC50 = 2.1 nM), effectively blocked the AII pressor response in conscious rats with significant duration (2.5 h at 1 mg/kg orally for 54). Among analogues possessing aryl substituents at N2, ortho substitution on the phenyl moiety resulted in several derivatives with in vitro potency in the low nanomolar range. One of these, featuring a 2-(trifluoromethyl)phenyl substituent at N2 (25, IC50 = 1.2 nM), was effective at 1 mg/kg orally in the rat model, with a duration of > 6 h. Implications for hydrophobic and hydrogen-bonding interactions with the AT1 receptor are discussed. |
| Databáze: | OpenAIRE |
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