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Trifluoroacetic anhydride. A convenient NMR solvent for carbohydrates. 270 MHz 1H NMR studies of 2-acetamido-2-deoxyhexoses

✍ Scribed by M. Ranganathan; P. Balaram

Publisher: John Wiley and Sons
Year: 1980
Tongue: English
Weight: 237 KB
Volume: 13
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270130314

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✦ Synopsis

Abstract

The use of trifluoroacetic anhydride as an NMR solvent for sugars has been explored. Dissolution of carbohydrates in this solvent is accompanied by trifluoroacetylation at the hydroxyl groups. Esterification results in downfield shifts of the sugar protons yielding very well resolved ^1^H NMR spectra. The use of trifluoroacetic anhydride in the analysis of complex systems is exemplified.

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The dynamic stereochemistry of dimesityl

The dynamic stereochemistry of dimesityl-2,4,6-trimethoxyphenylmethane: A 1H NMR study at 270 MHz

✍ R. Willem; C. Hoogzand 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 English ⚖ 448 KB

## Abstract The spectral behaviour of dimesityl‐2,4,6‐trimethoxyphenylmethane (1) was examined by ^1^H NMR spectroscopy at 270 MHz in order to resolve an isochrony of resonances observed in the low temperature spectra of 1 at 60 MHz. At 270 MHz the spectra of 1 exhibit well resolved __o__‐methyl re