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Bioorg Med Chem Lett ; 20(7): 2074-7, 2010 Apr 01.
Article in English | MEDLINE | ID: mdl-20219372

ABSTRACT

This Letter describes a series of potent and selective BRS-3 agonists containing a biarylethylimidazole pharmacophore. Extensive SAR studies were carried out with different aryl substitutions. This work led to the identification of a compound 2-{2-[4-(pyridin-2-yl)phenyl]ethyl}-5-(2,2-dimethylbutyl)-1H-imidazole 9 with excellent binding affinity (IC(50)=18 nM, hBRS-3) and functional agonist activity (EC(50)=47 nM, 99% activation). After oral administration, compound 9 had sufficient exposure in diet induced obese mice to demonstrate efficacy in lowering food intake and body weight via BRS-3 activation.


Subject(s)
Imidazoles/chemistry , Imidazoles/therapeutic use , Obesity/drug therapy , Receptors, Bombesin/agonists , Receptors, Bombesin/metabolism , Animals , Body Weight/drug effects , Eating/drug effects , Humans , Imidazoles/pharmacokinetics , Mice , Rats , Structure-Activity Relationship
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