Recent Developments in the Construction of cis-Glycosidic Linkages

Modem Synthetic Methods in Carbohydrate Chemistry From Monosaccharides to Complex Glycoconjugates, 

First Edition. Edited by Daniel B. Werz and Sebastien Vidal. 

In donor 29, the possible remote anchimeric assistance of the 6-O-acetyl group (vide infra) can also be of beneficial influence to the stereochemical outcome of the glycosylation at hand. To continue the synthesis of the guluronic add tetramer, the 1,6-anhydro-bridge in disaccharide 31 was opened, followed by selective anomeric 

A conceptually different approach to stereoselectively access 1,2-cix-glucosyl and 1,2-cis-galactosyl linkages was recently introduced by Boons and coworkers [31, 32]. 

Besides stereospecific reactions on anomeric triflate intermediates, furanosyl oxocarbenium ions have also been exploited for the introduction of cis-furanosidic 

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