Document Report Card

ID: ALA1944563

Journal: ACS Med Chem Lett

Title: Separation of Betti Reaction Product Enantiomers: Absolute Configuration and Inhibition of Botulinum Neurotoxin A.

Authors: Cardellina JH, Vieira RC, Eccard V, Skerry J, Montgomery V, Campbell Y, Roxas-Duncan V, Leister W, Leclair CA, Maloney DJ, Padula D, Pescitelli G, Khavrutskii I, Hu X, Wallqvist A, Smith LA.

Abstract: The racemic product of the Betti reaction of 5-chloro-8-hydroxyquinoline, benzaldehyde and 2-aminopyridine was separated by chiral HPLC to determine which enantiomer inhibited botulinum neurotoxin serotype A. When the enantiomers unexpectedly proved to have comparable activity, the absolute structures of (+)-(R)-1 and (-)-(S)-1 were determined by comparison of calculated and observed circular dichroism spectra. Molecular modeling studies were undertaken in an effort to understand the observed bioactivity and revealed different ensembles of binding modes, with roughly equal binding energies, for the two enantiomers.

CiteXplore: 22102940

DOI: 10.1021/ml200028z