The assignment of some 'H and -C NMR chemical shifts of apigenin have been uncertain and even contradictory. A reinvestigation with recent NMR techniques has led to a new set of =C NMR parameters and confinned the accepted 'H NMR data.
13C NMR spectra of a series of 2′,3′,4′-trimethoxyflavones. Reinvestigation of signal assignment in 13C NMR spectra of flavones
✍ Scribed by J.-C. Wallet; E. M. Gaydou
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 165 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
^13^C NMR chemical shifts of a series of 2′,3′,4′‐trimethoxylated flavones are reported. The ^13^C NMR chemical shifts of 2′,3′, 4′‐trimethoxyflavone was reinvestigated by 2D NMR. It is shown that two signals which were assigned by the lanthanide shift reagent method in an earlier study must be reversed.
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