## Abstract The influence of incorporating an group, an oxygen atom and the fragment in a saturated 7‐membered ring system on carbon‐13 n.m.r. chemical shifts is examined, and also, the influence of the dioxolane ring moiety on the ^13^C chemical shifts in these ring systems. Substituent effects
Carbon-13 n.m.r. studies: 68—diastereomeric nonequivalence and the characterization of some bisnorbornylpinacols
✍ Scribed by J. B. Stothers; K. C. Teo
- Publisher
- John Wiley and Sons
- Year
- 1977
- Tongue
- English
- Weight
- 403 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
The sodium‐ammonia reduction of racemic norcamphor, exo‐3‐methylnorcamphor and 3,3‐dimethyl‐norcamphor (camphenilone) leads to substantial yields (60–90%) of the corresponding 2,2′‐bisnorbornyl‐2,2′‐diols as diastereomeric mixtures. A combination of their ^1^H, ^13^C and infrared spectra together with the results of periodic acid and lead tetraacetate oxidations permits stereochemical assignments for these six pinacols.
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