Pseudosugars, 36. Synthesis of Methyl 5a′‐Carbamaltoses Linked by Imino, Ether and Sulfide Bridges and Unsaturated Derivatives Thereof

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<jats:title>Abstract</jats:title><jats:p>Methyl 5a′‐carbamaltoses linked by imino, ether, and sulfide bridges were synthesized by coupling of an amino carbasugar with a sugar epoxide and of the carbasugar epoxide with the oxide anion or thioacetate derived from sugar derivatives. Their unsaturated derivatives related to a potent α‐glucosidase inhibitor, methyl acarviosin, were also synthesized. Moderate inhibitory activity against baker's yeast α‐glucosidase was observed only for the imino‐linked compounds <jats:bold>2</jats:bold> and <jats:bold>5</jats:bold>.</jats:p>

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