Homoazanicotine: a structure-affinity study for nicotinic acetylcholine (nACh) receptor binding.
J Med Chem
; 45(21): 4724-31, 2002 Oct 10.
Article
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| MEDLINE
| ID: mdl-12361399
ABSTRACT
We have recently identified 3-[(1-methyl)-4,5-dihydro-1H-imidazol-2-yl)methyl]pyridine (homoazanicotine, 8) as a novel nicotinic acetylcholinergic (nACh) receptor ligand. In the present investigation, after we determined that 8 binds selectively at nicotinic (K(i) = 7.8 nM) vs muscarinic (K(i) > 10,000 nM) acetylcholinergic receptors, we examined its structure-affinity relationships for nACh receptor binding. The features investigated included the influence of (i) the composition of connector that separates the two rings, (ii) the N-methyl group, (iii) the ring opening of the imidazoline ring, (iv) the pyridine nitrogen atom, and (v) the aromatization of the imidazoline ring on nACh receptor affinity. As with nicotine, the parent structure seems optimal and most structural changes reduce nACh receptor affinity. Also, as with nicotine analogues, alteration of the spacer group influences affinity in a manner that is somewhat different than that seen with the parent structure.
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Banco de datos:
MEDLINE
Asunto principal:
Piridinas
/
Receptores Nicotínicos
/
Acetamidas
/
Nicotina
Límite:
Animals
Idioma:
En
Revista:
J Med Chem
Asunto de la revista:
QUIMICA
Año:
2002
Tipo del documento:
Article
País de afiliación:
Italia