Abstract
A new oxo form of D-mannose with cyclohexylidene and benzyl protective groups is synthesized with the aim of adapting the chloroglycidate synthesis for natural 3-deoxy-D-manno-octulosonic acid. The sites of fixation of the protective groups were established by converting a model compound, 4-O-acetyl-2,3: 5,6-di-O-cyclohexylidene-aldehydo-D-mannose, into a known dicyclohexylidene-D-manno-furanose. The oxo form was reacted with methyl dichloroacetate to obtain a stereoisomeric mixture of chloroglycidates which were transformed into the corresponding pyruvate. The ketone and enol forms of the latter compound were isolated and separately characterized.
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Kornilov, V.I., Glebova, Z.I., Turik, S.V. et al. Chloroglycidate Synthesis of a Precursor of Natural 3-Deoxy-D-manno-octulosonic Acid with Combined Protective Groups. Russian Journal of General Chemistry 74, 225–229 (2004). https://doi.org/10.1023/B:RUGC.0000025507.24993.c6
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DOI: https://doi.org/10.1023/B:RUGC.0000025507.24993.c6