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1: Carbohydr Res. 2006 Jul 3;341(9):1081-90. Epub 2006 May 6.Click here to read Links

N-glycoside neoglycotrimers from 2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyl azide.

Temelkoff DP, Zeller M, Norris P.

Department of Chemistry, Youngstown State University, 1 University Plaza, Youngstown, OH 44555-3663, USA.

2,3,4,6-Tetra-O-acetyl-beta-D-glucopyranosyl azide is available on large scale from D-glucose by means of a three-step sequence involving acetylation, activation as the glycosyl bromide, and stereospecific displacement with azide anion. The azide functionality then serves as a convenient anchor upon which to introduce new functionality, usually with retention of the beta-stereochemistry. Here we report the synthesis of an amide-linked N-glycosyl trimer, by employing a Staudinger-aza-Wittig process on the azide, as well as a hybrid N-glycosyl triazole-amide-linked trimer in which the sugars are separated by 1,2,3-triazole heterocycles. Both of these neoglycotrimers are isolated in good yield with high beta-selectivity in each case.

PMID: 16678807 [PubMed - indexed for MEDLINE]