Add time:07/31/2019         Source:sciencedirect.com

Mass spectra of several methyl and acetyl derivatives of 5-thio-d-glucopyranose, methyl derivatives of 4-thio-d-arabinofuranose, and acetyl and O-isopropylidene derivatives of 3-thio-D-allofuranose have been examined. Significant and diagnostic qualitative and quantitative differences in fragmentation of these derivatives compared to the corresponding oxygen analogs are discussed mainly from the point of view of the lower electronegativity of the sulfur atom compared to that of the atom of oxygen.

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