Chemistry and pharmacological characterization of novel nitrogen analogues of AMOP-H-OH (sazetidine-A, 6-[5-(azetidin-2-ylmethoxy)pyridin-3-yl]hex-5-yn-1- ol) as α4β2-nicotinic acetylcholine receptor-selective partial agonists

Jianhua Liu, J. Brek Eaton, Barbara Caldarone, Ronald J. Lukas, Alan P. Kozikowski

Research output: Contribution to journalArticlepeer-review

Abstract

In order to advance therapeutic applications of nicotinic ligands, continuing research efforts are being directed toward the identification and characterization of novel nicotinic acetylcholine receptor (nAChR) ligands that are both potent and subtype selective. Herein we report the synthesis and pharmacological evaluation of members of a new series of 3-alkoxy-5- aminopyridine derivatives that display good selectivity for the α4β2-nAChR subtype based on ligand binding and functional evaluations. The most potent ligand in this series, compound 64, showed high radioligand binding affinity and selectivity for rat α4β2-nAChR with a Ki value of 1.2 nM and 4700-fold selectivity for α4β2- over α3β4-nAChR, and ∼100-fold selectivity for functional, high-sensitivity, human α4β2-nAChR over α3β4*-nAChR. In the mouse forced swim test, compound 64 exhibited antidepressant-like effects. Structure-activity relationship (SAR) analyses suggest that the introduction of additional substituents to the amino group present on the pyridine ring of the N-demethylated analogue of compound 17 can provide potent α4β2-nAChR-selective ligands for possible use in treatment of neurological and psychiatric disorders including depression.

Original languageEnglish (US)
Pages (from-to)6973-6985
Number of pages13
JournalJournal of medicinal chemistry
Volume53
Issue number19
DOIs
StatePublished - Oct 14 2010

ASJC Scopus subject areas

  • Molecular Medicine
  • Drug Discovery

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