Abstract
Both α- and β-anomers of vinyl sulfone-modified pent-2-enofuranosides have been synthesized for the first time by taking advantage of the formation of α- and β-methyl glycosides in almost equal ratio only from derivatives of d-xylose. The strategy was equally applicable in the synthesis of α- and β-anomers of vinyl sulfone-modified hex-2-enopyranosides where a d-glucose derivative was selected over a d-allose derivative as the starting material because the former almost exclusively produced the required methyl pyranosides.
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