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Issue 47, 2015
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Assigning regioisomeric or diastereoisomeric relations of problematic trisubstituted double-bonds through heteronuclear 2D selective J-resolved NMR spectroscopy

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Abstract

Although one of the first 2D NMR methods, but so far neglected, selective J-resolved NMR spectroscopy offers a unique opportunity to help organic chemists in structure elucidation, avoiding natural and non-natural product misassignments. This NMR method indeed allowed us to unambiguously and simply assign (natural) product structures exhibiting trisubstituted unsaturations. For example, as demonstrated here, the isomeric aurone, flavone, coumarin and isocoumarin structures could easily be distinguished; regioisomer assignments in furans could be solved, as well as isomerisms in compounds containing trisubstituted double-bonds (aurones, lactones, divinyl ketones).

Graphical abstract: Assigning regioisomeric or diastereoisomeric relations of problematic trisubstituted double-bonds through heteronuclear 2D selective J-resolved NMR spectroscopy

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Supplementary files

Article information


Submitted
20 Feb 2015
Accepted
15 Apr 2015
First published
15 Apr 2015

This article is Open Access

RSC Adv., 2015,5, 37138-37148
Article type
Paper
Author version available

Assigning regioisomeric or diastereoisomeric relations of problematic trisubstituted double-bonds through heteronuclear 2D selective J-resolved NMR spectroscopy

M. Hoffmann, S. Miaskiewicz, J. Weibel, P. Pale and A. Blanc, RSC Adv., 2015, 5, 37138
DOI: 10.1039/C5RA03228H

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