Design and Synthesis of a Series of 6-Substituted-2-pyridinylmethylamine Derivatives as Novel, High-Affinity, Selective Agonists at 5-HT1A Receptors
| Autor: | Bernard Bonnaud, Cristina Cosi, Bernard Vacher, Wouter Koek, Philippe Funes, Marie Bernadette Assié, Nathalie Jubault |
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| Rok vydání: | 1998 |
| Předmět: |
Agonist
animal structures Intrinsic activity Pyridines medicine.drug_class Stereochemistry Chemical synthesis Cell Line Methylamines Mice Structure-Activity Relationship Receptors Adrenergic alpha-1 Drug Discovery Cyclic AMP polycyclic compounds medicine Animals Humans Moiety heterocyclic compounds Binding site Receptor Oxazoles 8-Hydroxy-2-(di-n-propylamino)tetralin Receptors Dopamine D2 Chemistry musculoskeletal neural and ocular physiology Colforsin Antidepressive Agents Serotonin Receptor Agonists nervous system Biochemistry Drug Design Receptors Serotonin Azetidines Molecular Medicine Serotonin Pharmacophore Receptors Serotonin 5-HT1 HeLa Cells |
| Zdroj: | Journal of Medicinal Chemistry. 41:5070-5083 |
| ISSN: | 1520-4804 0022-2623 |
| Popis: | A search for novel, selective agonists with high intrinsic activity at the 5-HT1A subtype of serotonin (5-HT) receptors was undertaken. Mechanistic and thermodynamic considerations led to the design of 6-substituted-2-pyridinylmethylamine as a potential 5-HT1A pharmacophore. Various adducts derived from the 6-substituted-2-pyridinylmethylamine moiety were tested for their affinity at 5-HT1A, alpha1-adrenergic, and D2-dopaminergic receptors. Compounds with high affinity for 5-HT1A receptors (pKi/= 8) were examined for agonist properties by measuring their ability to inhibit forskolin-stimulated cAMP production in HA7 cells (i.e., HeLa cells permanently transfected with the h5-HT1A receptor gene and expressing the h5-HT1A receptor protein). Several compounds of the type aryl¿4-[(6-substituted-pyridin-2-ylmethylamino)methyl]piperidin -1-yl¿ methanone had nanomolar affinity for 5-HT1A binding sites and were more than 500-fold selective with respect to alpha1 and D2 sites. Importantly, their 5-HT1A agonist properties were demonstrated in HA7 cells where they behaved as potent inhibitors of cAMP accumulation. In particular, (3, 4-dichlorophenyl)¿4-[(6-oxazol-5-ylpyridin-2-ylmethylamin o)methyl]pip eridin-1-yl¿methanone (70) and (3, 4-dichlorophenyl)¿4-[(6-azetidinopyridin-2-ylmethylamino)met hyl]piper idin-1-yl¿methanone (36) appeared to be more potent than, and at least as efficacious as, the prototypical 5-HT1A agonist (+/-)-8-OH-DPAT. SAR studies revealed that the pyridine nitrogen atom and the nature and the position of the substituents on the pyridine ring were critically involved in the ability of the compounds to recognize and activate 5-HT1A receptors. Structural modifications of the nonpharmacophoric part of the molecule showed, however, that the entire structure was required for affinity at 5-HT1A binding sites. |
| Databáze: | OpenAIRE |
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