Trimethylsilylation - Aid in NMR Analysis of Oligosaccharides. Assigment of29Si and13C NMR Spectra of Trimethylsilylated Methyl β-D-Xylobiosides by 2D NMR
作者:
Jan Schramla,
Eva Petráková,
Jan Pelnař,
Magdalena Kvíačlova,
Václav Chvalovský,
期刊:
Journal of Carbohydrate Chemistry
(Taylor Available online 1985)
卷期:
Volume 4,
issue 3
页码: 393-403
ISSN:0732-8303
年代: 1985
DOI:10.1080/07328308508070189
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The1H,13C and29Si NMR spectra of methyl β-D-xylopyranoside and three methyl β-D-xylopyranosyl-β-D-xylopyranosides have been measured and assigned by two-dimensional NMR spectroscopy. According to the determined proton-proton coupling constants, the ring conformer ratio is essential ly the same in the studied compounds. The assigned chemical shifts provide correct substituent chemical shifts for assignments in the spectra of higher trimethylsilylated xylooligosaccharides. Heteronuclear chemical shift correlated 2D NMR spectroscopy is proven to be a usable experimental method for29Si NMR line assignment in carbohydrates. The assigned silicon shifts identify the site of glycosidation.
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