The structure of sucralose, is shown a) identify the galactose unit and the fructose unit 4) identify the type of glycosidic bond present c) determine if sucrose in a reducing sugar CH₂OH C! сухон 964 off 94 CH₂Cl

Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter24: Biochemistry
Section24.2: Carbohydrates
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lose
showen
is,
The structure of sucral
a) identify the galactose unit and the fructose unit
4) identify the type of glycosidec bond present
c) determine if sucrose in a reducing sugar'
CH₂OH
C!
CH₂OH
gét
B
CH₂Cl
Transcribed Image Text:lose showen is, The structure of sucral a) identify the galactose unit and the fructose unit 4) identify the type of glycosidec bond present c) determine if sucrose in a reducing sugar' CH₂OH C! CH₂OH gét B CH₂Cl
Expert Solution
Step 1

Aldehyde-containing monosaccharides can cyclize through an intramolecular OH attack on the carbonyl carbon in an addition reaction to create a hemiacetal (hemiketal if attack on a ketone). Another alcohol may be added in response to the addition of acid, which protonates the anomeric OH and creates water as a potential leaving group, resulting in the formation of an acetal (or ketal from a ketone) with water leaving.
Because it functions as a reducing sugar, a hemiacetal structure is unstable in nature. Acetals, on the other hand, are non-reducing sugars and are stable because they cannot be changed back into hemiacetals or aldehydes.

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