Abstract
Regio- and stereoselective synthesis of oligosaccharides with unprotected or lightly protected gluco-, manno-, and rhamnose as glycosyl acceptors was achieved via sugar orthoester formation-rearrangement. α-(1→6)- Linked mannose oligosaccharides, β-(1→6)-linked glucose oligosaccahrides, and 3,6-branched mannose and glucose oligosaccharides were conveniently synthesized with quite simplified procedure. Biologically important oligosaccharides such as phytoalexin elicitor glucohexaose, antitumor fragments of lentinan, and some repeating units of biologically important polysaccharides were prepared readily. Recent progress in regioselective synthesis of oligosaccharides with lightly protected glucosamine and galactose as acceptors was also outlined.
Keywords: Oligosaccharides, Glycosyl, glucohexaose, phytoalexin
Call for Papers in Thematic Issues
Catalytic C-H bond activation as a tool for functionalization of heterocycles
The major topic is the functionalization of heterocycles through catalyzed C-H bond activation. The strategies based on C-H activation not only provide straightforward formation of C-C or C-X bonds but, more importantly, allow for the avoidance of pre-functionalization of one or two of the cross-coupling partners. The beneficial impact of ...read more
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