Ketose

monosaccharide

Class I monosaccharide , in the monosaccharide Oxidation number The highest C atom (designated as C-2) is a Keto group 。

Molecular formula: CAS No
Nature: Under the action of strong oxidant, ketose is cracked at the ketone base to produce oxalic acid and tartaric acid.

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Polyhydroxy ketones are called ketoses, such as Dihydroxyacetone 、 Erythrin 、 Xylulose 、 fructose 、 Sedum Sedum heptanose They are all naturally occurring ketoses, which are ketones with hydroxyl groups on α - carbon. aldose And ketose have Alcohol hydroxyl and carbonyl The nature of reducing sugar Because there is no ketose in the molecule Aldehyde group , but its carbonyl group is affected by adjacent Alpha carbon atom The effect of hydroxyl groups on the surface, and showed a reducing activity.

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(1) Seliwanofs test, resorcinol to hydrochloric acid The color of aldose is very light; (2) Weak oxidizer, such as Bromine water It can oxidize aldose into corresponding glucic acid But not for ketose oxidation 。

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