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.
Complete 13C and 1H spectral assignments of certain substituted quinoxalinones
✍ Scribed by Valérie Rampont-Placidi; Benoit Cossec; Marie-Thérèse Brondeau; Pierre Mutzenhardt
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 196 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
Two tagging reagents using a quinoxalinone Ñuorophore were synthesized and, for the Ðrst time, completely physicochemically characterized. The 1H and 13C spectra were entirely assigned using a combination of two-dimensional gradient enhanced HMQC, HMBC experiments and one-dimensional NOE di †erence experiments.
📜 SIMILAR VOLUMES
The indole alkaloid strychnobrasiline was studied using one-and two-dimensional NMR techniques. The interpretation of these spectra led to the complete assignments of all carbon and proton chemical shifts.
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.
In addition to 1D NMR methods and 2D shift-correlated NMR techniques (COSY and HETCOR), spin-spin simulation and MMX calculations, to obtain the minimum energy conformation structure, were used for the complete 1 H and 13 C NMR assignments of stephalic acid.
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