Condensation of (Γ)-norephedrine with excess formaldehyde under mild conditions leads to formation of the 2 :1 condensation product N,NΒΊ-methylenebis(4-methyl-5-phenyl)oxazolidine compared with the reaction with 1 mol of formaldehyde, which leads to 4-methyl-5-phenyloxazolidine. 1H and 13C NMR spect
1H NMR spectroscopic studies of the moenomycins
β Scribed by Lothar Hennig; Matthias Findeisen; Peter Welzel; Rainer Haessner
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 239 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0749-1581
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β¦ Synopsis
Highly resolved 1H NMR spectra of the moenomycin antibiotics can be obtained in solution D 2 O when the concentration is below the critical micelle concentration. The 600 MHz spectra are structurally highly informative.
π SIMILAR VOLUMES
As a consequence of aggregate formation, no 'H NMR spectra of the amphiphilic antibiotic moenomycin A have been obtained previously. It was now found that the system moenomycin A-D20-C,D, after sonification yielded highly resolved 'H NMR spectra, probably due to the formation of a microemulsion. Sim
NMR spectroscopy was used to examine hepatic metabolism in cirrhosis with a particular focus on markers of functional cellular hypoxia. 31 P and 1 H NMR spectra were obtained from liver extracts from control rats and from rats with carbon tetrachloride-induced cirrhosis. A decrease of 34% in total p