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DOI: 10.1055/s-0028-1083292
Efficient Synthesis of an Allose-Containing Analogue of the Phytoalexin-Elicitor Glucohexaose and Its Dodecyl Glycoside
Publication History
Publication Date:
19 December 2008 (online)
Abstract
An allose-containing analogue 2 of the phytoalexin elicitor β-(1→3)-branched β-(1→6)-linked glucohexatose and its dodecyl glycoside 3 has been regio- and stereospecifically synthesized. As a typical example of the method, the synthesis of 2 was achieved via coupling of the trisaccharide donor 2,3,4,6-tetra-O-benzoyl-β-d-glucopyranosyl-(1→3)-[2,3,4,6-tetra-O-benzoyl-β-d-glucopyranosyl-(1→6)]-1,2-O-isopropylidene-α-d-allopyranosyl trichloroacetimidate (9) with a trisaccharide acceptor. The donor was prepared easily from 1,2:5,6-di-O-isopropylidene-α-d-allofuranose (5) and 2,3,4,6-tetra-O-benzoyl-α-d-glucopyranosyl trichloroacetimidate (4) in a regio- and stereoselective manner.
Key words
oligosaccharides - synthesis - glycosides - glycosylations - stereoselectivity
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