Natural-abundance 17O NMR of monosaccharides
✍ Scribed by Ioannis P Gerothanassis; Jürgen Lauterwein; Norman Sheppard
- Publisher
- Elsevier Science
- Year
- 1982
- Weight
- 901 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0022-2364
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## Abstract The ^17^O NMR chemical shift data for a series of substituted 10‐methyleneanthrones and related 10‐alkylanthrones in acetonitrile solution at 75°C are reported. The ^17^O NMR chemical shift value of 10‐methyleneanthrone is shielded by __ca__. 35 ppm compared with that of anthraquinone.
## Abstract Natural abundance ^17^O NMR spectroscopic data, in toluene‐__d__~8~ at 90°C, were obtained for different classes of steroids, including androstanes, estranes, pregnanes, cholanes and cholestanes. Only routine acquisition parameters were used in combination with linear prediction methods
## Abstract The ^17^O chemical shifts of nine sulphinylimines and isocyanates are reported and discussed in terms of electronic and mesomeric effects. Unusually large values were found for the sulphinylimines. The differences in acyl fluorides compared with acyl chlorides are rationalized on the ba
The natural-abundance \({ }^{17} \mathrm{O}\) NMR spectra of 35 ozonides have been examined with the following results: Symmetrically tetrasubstituted ozonides and symmetrically disubstituted ozonides give only one signal each for the ether and the peroxide \(O\) atoms. Unsymmetrically tetrasubstitu