Assignment of anomeric configuration and identification of carbohydrate residues by 13C nmr. 1. Galacto- and glucopyranosides and furanosides

A 13C nmr analysis method is described for the identification of carbohydrate residues in galactosides and glucosides. This method reveals the capability of 13C nmr to distinguish the difference in structural configuration of these carbohydrate residues. Not only can the anomeric configuration be assigned, the furanyl and pyranyl nature of the ring is concomitantly determined. This method is consistent for all reported 13C nmr spectra of nonaromatic galactosides and glucosides.