## Abstract The ^1^H and ^13^C NMR spectra of carminic acid were completely assigned, thus confirming its structure and the conformation of the glucose residue.
1H and 13C NMR study of 2-hydroxyglutaric acid and its lactone
โ Scribed by Dominika Bal; Adam Gryff-Keller
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 97 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0749-1581
- DOI
- 10.1002/mrc.1053
No coin nor oath required. For personal study only.
โฆ Synopsis
Abstract
Determination of the level and absolute configuration of 2โhydroxyglutaric acid in a patient's urine is a method of diagnosing two metabolic diseases. Such a determination can be done with the aid of NMR spectroscopic methods. In this paper the careful interpretation of ^1^H and ^13^C NMR spectra of this metabolite and its lactone measured under conditions used in biomedical assays is reported. The ^1^H chemical shifts and spinโspin coupling constants were derived using the total lineshape analysis method. Copyright ยฉ 2002 John Wiley & Sons, Ltd.
๐ SIMILAR VOLUMES
H and "C NMR studies of N-methyl-substituted hydroxamic acids, RCON(CH,)OH (R = CH,, C,H, and C6Hs), show that the series exhibits &-trans isomerism about the C-N bond. The Z/E ratio increases in the series CH, < C,H, < n-CsH,, < n-C,H,, for a given solvent, indicating that steric interaction betwee
## Abstract The ^1^H NMR spectra of E/Z 2โhydroxyindolenines are reported in both CDCl~3~ and DMSOโd~6~ solvents. The data suggest a preferred conformation of the heterocyclic ring, which is slightly distorted from planarity, in agreement with the xโray crystallographic data of one of the isomers.
## Abstract 250 MHz ^1^H NMR of two monosubstituted [2.2]paracyclophanes shows that whether the substituent is an electron releasing group, OMe, or a withdrawing group, CO~2~Me, the transannular effect is deshielding. 62.86 MHz ^13^C NMR shows that among the six transannular effects, only one has a
## Abstract The high toxicity of diphenylarsinic acid, found in ground water and well water as a probable consequence of the inappropriate disposal of warfare agents, prompted us to study the reaction, monitored by ^1^H and ^13^C NMR spectroscopy, of the compound and its monophenyl analogue, phenyl
Some derivatives of benzoxazolinone are studied by 'H and 13CNMR spectroscopy. 6-Crotonoyl (or cinnamoyl)-3methylbenzoxazolinones exist in the (8configuration and prefer the syn-planar conformation. 2,3-Dihydro-2,5-and 2,3dihydro -2,7 -dioxo -3-methylcyclopenta -[flbenzoxazoles are easily distinguis