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Application of selective F-1 decoupled H-1 NMR for enantiomer resolution and accurate measurement of enantiomeric excess at low chiral substrate/auxiliary concentration

Nath, Nilamoni and Kumari, Divya and Suryaprakash, N (2011) Application of selective F-1 decoupled H-1 NMR for enantiomer resolution and accurate measurement of enantiomeric excess at low chiral substrate/auxiliary concentration. In: Chemical Physics Letters, 508 (1-3). pp. 149-154.

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Official URL: http://dx.doi.org/10.1016/j.cplett.2011.04.012

Abstract

The higher substrate and chiral auxiliary concentration is a pre-requisite to obtain efficient separation of H-1 NMR signals of enantiomers. The higher concentration of chiral lanthanide shift reagents provides broadened spectral lines resulting in a severe loss of resolution between the enantiomer resonances. In order to circumvent such difficulties, herein we present the application and the usefulness of a selective F-1 decoupled correlation (COSY) experiment which yields proton decoupled proton spectra in the indirect dimension. The potentiality of the experiment is demonstrated on several chiral compounds possessing different functional groups, employing either a lanthanide shift reagent or a solvating reagent as chiral auxiliaries. (C) 2011 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science B.V.
Department/Centre: Division of Chemical Sciences > NMR Research Centre (Formerly SIF)
Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 01 Jun 2011 12:14
Last Modified: 01 Jun 2011 12:14
URI: http://eprints.iisc.ernet.in/id/eprint/37811

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