Glycosyl

In organic chemistry, a glycosyl group is a univalent free radical or substituent structure obtained by removing the hydroxyl (−OH) group from the hemiacetal (−CH(OH)O−) group found in the cyclic form of a monosaccharide and, by extension, of a lower oligosaccharide.

[1] The outcome of the glycosylation reaction is largely dependent on the reactivity of each partner.

[3] In cellulose, glycosyl groups link together 1,4-β-D-glucosyl units to form chains of (1,4-β-D-glucosyl)n. Other examples include ribityl in 6,7-Dimethyl-8-ribityllumazine, and glycosylamines.

Instead of the hemiacetal hydroxyl group, a hydrogen atom can be removed to form a substituent, for example the hydrogen from the C3 hydroxyl of a glucose molecule.

Its fluorescence and permeability through cell membranes helped detect Au3+.

The β- D -glucopyranosyl group which is obtained by the removal of the hemiacetal hydroxyl group (bottom right) from β- D -gluco pyranose
The β-D-glucopyranose-3- O -yl group which is obtained by the removal of a hydrogen from the C3 hydroxyl (bottom left) of β- D -glucopyranose