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Revision of the 13C NMR signal assignment of harman, based on one- and two-dimensional INADEQUATE spectroscopy

✍ Scribed by D. H. Welti

Publisher: John Wiley and Sons
Year: 1985
Tongue: English
Weight: 268 KB
Volume: 23
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260231016

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✦ Synopsis

For harman, a key molecule in the structure elucidation of f3-carbolie-type plant alkaloids, an unambiguous assignment of the =C N M R spectrum is given, based on two-dimensional INADEQUATE spectroscopy.

One-bond carbon-carbon coupling constants have been obtained from one-dimensional INADEQUATE spectra. The unequivocal results obtained by these methods allow the correction of all earlier, controversial resonance assignments for harman in the literature. The assignments for a number of related molecules will, in turn, have to be corrected.

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