Abstract
The signals of the 13C-n.m.r. spectra of the eight isomeric 1,6-anhydro-β- D-hexopyranoses having the 1C 4 conformation were assigned by comparison with the spectra of selectively deuterated derivatives and by observation of the substituent effect of the O-isopropylidene derivatives. Of the two substituted C atoms in the O-isopropylidene derivatives, the signal of the equatorially substituted C atom was shifted to a lower field more strongly than that of the carbon atom bearing an axial substituent. The chemical shifts and their calculation with empirical parameters are discussed.
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