Carbon-13 N.M.R. spectra of 6β-Substituted-5α-cholestane-3β,5-diols: γ- and δ-effects
- 1 January 1975
- journal article
- research article
- Published by CSIRO Publishing in Australian Journal of Chemistry
- Vol. 28 (5) , 1017-1021
- https://doi.org/10.1071/ch9751017
Abstract
The carbon-13 N.M.R. spectra of a series of 6β-substituted-5α- cholestane-3β,5-diols have been determined. The γ- and δ-shifts associated with those carbons involved in a direct steric interaction with the 6β-substituent, i.e. C4, C8, C10 and C19, are found to be upfield or downfield depending on the nature of the substituent and its geometric relationship to the observed carbon. In particular, the-δ- shifts at C19 are increasingly downfield as the size of the substituent is increased.Keywords
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