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Chirality

Chirality

IF: 2.79
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The enantiomers of epiboxidine and of two related analogs: Synthesis and estimation of their binding affinity at α4β2 and α7 neuronal nicotinic acetylcholine receptors

Published:5 May 2012 DOI: 10.1002/chir.22052 PMID: 22566097
Clelia Dallanoce, Carlo Matera, Marco De Amici, Luca Rizzi, Luca Pucci, Cecilia Gotti, Francesco Clementi, Carlo De Micheli

Abstract

Epiboxidine hydrochlorides (+)-2 and (?)-2, which are the structural analogs of the antipodes of epibatidine (±)-1, as well as the enantiomeric pairs (+)-3/(?)-3 and (+)-4/(?)-4 were synthesized and tested for binding affinity at α4β2 and α7 nicotinic acetylcholine receptor (nAChR) subtypes. Final derivatives were prepared through the condensation of racemic N-Boc-7-azabicyclo[2.2.1]heptane-2-one (±)-5 with the resolving agent (R)-(+)-2-methyl-2-propanesulfinamide. The pharmacological analysis carried out on the three new enantiomeric pairs evidenced an overall negligible degree of enantioselectivity at both nAChRs subtypes, a result similar to that reported for both natural and unnatural epibatidine enantiomers at the same investigated receptor subtypes. Chirality 24:543–551, 2012. ? 2012 Wiley Periodicals, Inc.

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