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Glycosidic bond

Certain types of chemical bonds
Glycosidic bond( English: Glycosidic bond, old name Glycosidic bond ), refers to a specific type of Chemical bond , Connect Glycoside The non sugar part (i.e. aglycone) in the molecule is related to Glycosyl , or sugar group and Glycosyl Substances containing glycoside bonds are called glycosides (or [1] Sugar bodies).
According to different head with sugar base carbon atom Different connected atoms, sugar Glycosidic bond Generally, it can be divided into oxygen glycoside bond, nitrogen glycoside bond, sulfur glycoside bond, carbon glycoside bond, etc.
Chinese name
Glycosidic bond
Foreign name
glycosidic bond
Alias
Glycosidic bond
Interpretation
Specific type Chemical bond
Category
Chemical bond
Classification
Oxygen glycoside bond, nitrogen glycoside bond, thioglycoside bond, carbon glycoside bond, etc

Basic concepts

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O-glycosidic bond is a sugar half acetal The hydroxyl group in structure can be mixed with other compounds containing hydroxyl group (such as alcohol Phenols )The acetal derivatives are condensed after dehydration and become glycosides. The chemical bond between them is the glycosidic bond. For glycosides, please refer to Baidu entry.

Naming method

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Designation of glycosidic bonds [2]
First, it is necessary to point out the glycosides Key connection Where is the sugar. Expression of glycoside bond: point out that the bond connects two carbon atom Location of, by Glycosyl The carbon level of is pointed by the arrow Ligands Carbon level, such as 1 → 4 or 1 → 6. If both sugar units are ligands to each other, they are represented by double arrows, such as 1 1,1 2。 Secondly, we should understand whether the glycosidic bond is α - or β -, and the configuration of the glycosidic bond is provided by Semiacetal Configuration determination of (ketone) hydroxyl group.
Based on the above principles, the naming of glycosidic bonds starts from the first sugar group on the left, indicating that the configuration of each sugar group is Arabic numerals And numbers represent glycosidic bonds. For example: malt dust α - 1,4 glycoside bond lactose Beta-1,4 glycoside bond Galactose α - 1,6 glycoside bond.
Here are some common Disaccharide Of Connection mode [3]
malt dust : α - 1,4 glycoside bond
Isomaltose : α - 1,6 glycoside bond
lactose Cellobiose : beta-1,4 glycoside bond
sucrose : α - 1-2 β glycoside bond
Gentianobiose : beta-1,6 glycoside bond
seaweed Disaccharides: α - 1,1 glycoside bond
Melibiose : α - 1,6 glycoside bond
chondroitin Disaccharides: beta-1,3 glycosidic bonds
Hyaluronic disaccharide: beta-1,3 glycosidic bond
Inulin Disaccharides: β - 2,1 glycoside bond