Abstract
Silver benzoate catalysed Wolff rearrangement of a series of α-diazo ketones, derived from furanuronic acids, in methanol proceeds with good yields to produce the corresponding one carbon homologated methyl-5-deoxy-hexo-furanuronate. The utility of methyl-1,2-O-isopropylidene-3-O-methyl-5-deoxy-α-d-xylo-hexo-furanuronate was demonstrated in the synthesis of the right wing segment of carbonolide B - the aglycone of the 16 membered macrolide antibiotic carbomycin B.
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