Synthesis of a hexasaccharide fragment of group E streptococci polysaccharide and the tetrasaccharide repeating unit of E. coli O7:K98:H6 |
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Authors: | Zeng Youlin Kong Fanzuo |
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Institution: | Research Center for Eco-Environmental Sciences, Academia Sinica, PO Box 2871, Beijing 100085, PR China. |
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Abstract: | Syntheses of a hexasaccharide, the dimer of the repeating unit of the group E streptococci polysaccharide, and a tetrasaccharide, the repeating unit of the E. coli O7:K98:H6, were achieved by constructing alternate alpha-L-(1-->2)- and alpha-L-(1-->3)-linked L-rhamnopyranose backbones and substituting with beta-linked D-glucopyranose side chains for the former, and a D-glucopyranosyluronate branch for the latter, respectively, at O-2 of the L-rhamnose ring. |
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Keywords: | Rhamnose oligosaccharides Trichloroacetimidates |
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