Some anomeric per-O-acetyl o-methylphenyl 1-thio glycosides have been synthesised and their carbon-13 NMR spectra were recorded. The chemical shifts were assigned. By comparing the chemical shift at C1 position
between α and β anomer
we found that the chemical shift at C1 of the β anomer is large than the α anomer So that
we can determine the configuration of 1-thio glycosides by 13C NMR.