Chapter 15 Carbohydrates 15.4 Chemical Properties of Monosaccharides General, Organic, and Biological Chemistry

Reducing Sugars Reducing sugars are monosaccharides with a carbonyl group that oxidizes to give a carboxylic acid undergo reaction with Benedict’s reagent (Cu2+) to give the corresponding carboxylic acid include the monosaccharides glucose, galactose, and fructose General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.

Oxidation of D-Glucose, a Reducing Sugar Glucose is oxidized to a carboxylic acid. Benedicts reagent General, Organic, and Biological Chemistry

Reduction of Monosaccharides The reduction of monosaccharides involves the carbonyl group produces sugar alcohols called alditols such as D-glucose gives D-glucitol, also called D-sorbitol General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.

Learning Check Write the products of the oxidation and reduction of D-mannose. D-Mannose General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.

Solution Write the products of the oxidation and reduction of D-mannose. D-Mannitol D-Mannose D-Mannonic acid General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc.