Modified gluco- and galactopyranosides with sterically demanding
groups in the 4-position were synthesized. Glycosylation studies
of these tertiary alcohols with glycosyl trichloroacetimidates
and glycosyl phosphates were performed. Despite steric hindrance
the modified disaccharide moieties could be assembled in moderate
yields.
carbohydrates - glycosylation - steric hindrance - glycosides