1H and 13C NMR relaxation investigation of methotrexate in [2H6]dimethyl sulphoxide solution
โ Scribed by Elena Gaggelli; Gianni Valensin; Antonio Vivi; Antonella Macotta
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 298 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
โฆ Synopsis
Abstract
^1^H and ^13^C NMR parameters of methotrexate in [^2^H~6~]dimethyl sulphoxide were obtained and analysed in terms of a โpreferredโ conformation. The effective correlation time of the anisotropic motion of the pteridinylbenzoyl moiety was evaluated as ca. 10 ns at 300 K. The ^1^H๏ฃฟ^1^H and ^13^C๏ฃฟ^1^H distances obtained were used to construct the molecular structure in solution.
๐ SIMILAR VOLUMES
## Abstract The tautomerism of 5(6)โmethoxyโ2โ{[(4โmethoxyโ3,5โdimethylโ2โpyridinyl)methyl] sulfinyl}โ1__H__โbenzimidazole (omeprazole) was determined in solution, __K__~__T__~ = 0.59 in THF at 195 K, in favor of the 6โmethoxy tautomer. The assignment of the signals was made by comparison with its
A full 1H and 1C NMR study through the use of one-and two-dimensional techniques (HMQC, HMBC, TOCSY and NOE-di โ erence spectroscopy) was carried out on poly[3-(6-methoxyhexyl)-2,2@-bithiophene]. Inter-ring correlations detected in the HMBC spectra proved to be a valuable tool in the assignment of re
The 1 H and 13 C NMR spectra of some 6-substituted 2naphthyl methyl sulphides were assigned unambiguously using NOE and two-dimensional NMR spectral techniques and the influence of substituents on the chemical shifts is discussed.
## Abstract Full assignments of the ^1^H and ^13^C NMR spectra of spiramycin l in CDCl~3~ and buffered D~2~O were carried out unambiguously using a range of 1D and 2D NMR methods.