Sugar anhydride

Example of a sugar anhydride with the ether bridge ( oxirane group ) in the foreground: 2,3-Anhydro-4- O -methyl-α- D -mannopyranose.

Sugar anhydrides , also known as anhydrosugars , are monosaccharides that contain an ether bridge formed by splitting off water from two hydroxyl groups . Sugar anhydrides are inner acetals and resemble glycosides in their chemical behavior and are insoluble in most organic solvents. The sugar anhydrides are soluble in water and short-chain alcohols . Sugar anhydrides are hydrolyzed to the respective sugars by means of water or dilute acids , whereby a balance between sugar and sugar anhydride is often established.

Well-known sugar anhydrides are 1,6-anhydro-β- D -glucopyranose (formerly called levoglucosan) and galactosan. Dianhydrides of sugars are also known.

Individual evidence

^ Brockhaus ABC Chemie , VEB FA Brockhaus Verlag Leipzig 1965, p. 1575.
^ Brockhaus ABC Chemie , VEB FA Brockhaus Verlag Leipzig 1965, p. 277.
↑ Otto-Albrecht Neumüller (Ed.): Römpps Chemie-Lexikon. Volume 6: T-Z. 8th revised and expanded edition. Franckh'sche Verlagshandlung, Stuttgart 1988, ISBN 3-440-04516-1 , p. 4732.

[1] Brockhaus ABC Chemie , VEB FA Brockhaus Verlag Leipzig 1965, p. 1575.

[2] Brockhaus ABC Chemie , VEB FA Brockhaus Verlag Leipzig 1965, p. 277.

[Römpp-3] Otto-Albrecht Neumüller (Ed.): Römpps Chemie-Lexikon. Volume 6: T-Z. 8th revised and expanded edition. Franckh'sche Verlagshandlung, Stuttgart 1988, ISBN 3-440-04516-1 , p. 4732.