The 1 H and 13 C NMR resonances of 12 tetracyclic phenothiazine derivatives were completely and unequivocally assigned by the concerted application of 1 H-detected heteronuclear one-bond (gs-HMQC) and long-range (gs-HMBC) gradient selected correlation experiments. 1 H and 13 C chemical shifts are al
1H and 13C NMR Assignments of Some Green Tea Polyphenols
β Scribed by Adrienne L. Davis; Ya Cai; Alan P. Davies; J. R. Lewis
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 333 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0749-1581
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β¦ Synopsis
Complete and unequivocal 'H and "C NMR assignments for a range of green tea polyphenols lepiafzelechin, catechin, epicatechin, gallocatechin, epigallocatechin, catechin-3-O-gallate, epicatechin-3-O-gallate, gallocatechin-3-O-gallate, epigallocatechin-3-0-gallate and epigallocatechin-3-0-(3'-O-methyl)-gallate] in acetone-d, solvent have been achieved using the 2D proton-carbon correlation experiments HMQC and HMBC and also 1D NOE difference spectroscopy.
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1 H and 13 C NMR spectral data for phytochelatin, NH 3 C --Glu-Cys 2 -Gly-COO , were assigned by a combination of one-( 1 H, 13 C) and two-dimensional (DQF-COSY, CH-COSY, HMBC) NMR experiments.
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The complete assignments of 1H and 13C NMR data for a series of synthesized diosgenyl saponin analogs are described, viz. diosgenyl b-D-glucopyranoside (1), diosgenyl a-L-rhamnopyranosyl- 7). The assignments were achieved using homo-and heteronuclear two-dimensional NMR techniques.
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