The glycosides can be classified by the glycone, by the type of glycosidal linkage, and by the aglycone.
CLASSIFICATION
The glycosides can be classified by the glycone, by the type
of glycosidal linkage, and by the aglycone.
On the Basis of Glycone
If the glycone group of a glycoside is glucose, then the
molecule is a glucoside; if it is fructose, then the molecule is a fructoside;
if it is glucuronic acid, then the molecule is a glucuronide, etc.
On the Basis of Glycosidic Linkage
1. O-glycosides:
Sugar molecule is combined with phenol or –OH group of aglycon, for
example, Amygd-aline, Indesine, Arbutin, Salicin, cardiac glycosides,
anthraxquinone glycosides like sennosides etc
2. .
3. N-glycosides:
Sugar molecule is combined with N of the –NH (amino group) of aglycon,
for example, nucleosides
4. S-glycosides:
Sugar molecule is combined with the S or SH (thiol group) of aglycon,
for example, Sinigrin.
5. C-glycosides:
Sugar molecule is directly attached
with C—atom of
aglycon, for example, Anthraquinone glycosides like Aloin, Barbaloin,
Cascaroside and Flavan glycosides, etc.
On the Basis of Aglycone
The various classes according to aglycone moiety are given
below:
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