Amygdalin, or laetrile, is a cyanogenic glycoside isolated...

Amygdalin, or laetrile, is a cyanogenic glycoside isolated in 1830 from almond and apricot seeds. Acidic hydrolysis of amygdalin liberates HCN, along with benzaldehyde and 2 equivalents of n-glucose. If amygdalin is a $\beta$-glycoside of benzaldehyde cyanohydrin with gentiobiose (Problem $21.56)$ what is its structure?

Key Concepts

Cyanogenic Glycosides

Cyanogenic glycosides are a class of naturally occurring compounds that contain a sugar moiety and a cyanohydrin group. They can release hydrogen cyanide through enzymatic or acid-catalyzed hydrolysis, and are significant in both plant defense mechanisms and toxicology studies.

Acidic Hydrolysis

Acidic hydrolysis is a chemical process in which an acid catalyzes the cleavage of bonds, especially glycosidic bonds in glycosides. This reaction results in the breakdown of complex molecules into simpler units, allowing for the release of identifiable fragments that aid in structural determination.

Beta-Glycosidic Linkage

A beta-glycosidic linkage refers to the stereochemical configuration of the bond between a carbohydrate and another molecule, where the glycosidic bond is formed with the hydroxyl group in the beta position relative to the anomeric carbon. This configuration influences the reactivity and physical properties of the compound.

Cyanohydrins

Cyanohydrins are organic compounds that feature both a hydroxyl group and a cyano group on the same carbon atom. They are typically formed by the addition of hydrogen cyanide to aldehydes or ketones, and play a crucial role in the chemistry of cyanogenic compounds by acting as intermediates in their biosynthesis and degradation.

Disaccharides

Disaccharides are carbohydrates composed of two monosaccharide units linked by a glycosidic bond. In natural products, disaccharides such as gentiobiose serve as the sugar component in glycosides, affecting the solubility, stability, and biological activity of the molecule.

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