Efficient Synthesis of the Pentasaccharide Repeating Unit of the O-Antigenic Polysaccharide of Escherichia coli O166 Strain.

An efficient strategy has been developed for the synthesis of the pentasaccharide repeating unit of the cell-wall polysaccharide of Escherichia coli O166 strain through sequential stereoselective glycosylations of monosaccharide intermediates. All the glycosylation steps were high-yielding with high stereoselectivities. [ABSTRACT FROM AUTHOR]