This document, titled "CARBOHYDRATES 5" for the CHM211 course, offers a comprehensive and in-depth exploration of carbohydrate chemistry, spanning from the fundamental reactions of monosaccharides to the complex structures and biological roles of disaccharides, polysaccharides, and glycoconjugates. It serves as a detailed guide to understanding the diverse chemical transformations monosaccharides undergo, including various reduction and oxidation reactions, osazone formation, esterification, ether formation, and the crucial process of glycoside formation. The document also delves into important structural interconversions like mutarotation and chain modification reactions such as Kiliani-Fischer synthesis and Ruff degradation.

Beyond the reactivity of simple sugars, the material extensively covers the structural characteristics, types of glycosidic linkages, and hydrolysis of key disaccharides, specifically maltose, lactose, and sucrose, highlighting their classification as reducing or non-reducing sugars. A significant portion is dedicated to the vast world of polysaccharides, differentiating between homopolysaccharides (like starch, glycogen, cellulose, and chitin) and heteropolysaccharides (such as pectin, gums, mucilages, and glycosaminoglycans). For each, detailed structural features, specific glycosidic linkages, and their respective biological functions are thoroughly explained.

Finally, the document introduces the concept of glycoconjugates, which are carbohydrates covalently linked to other biomolecules, emphasizing their critical roles in biological systems. It defines and provides examples of proteoglycans, glycoproteins, and glycolipids, illustrating how these complex molecules contribute to cell recognition, signaling, and structural integrity. Overall, this PDF is an essential resource for students to grasp the fundamental chemical properties, structural diversity, and profound biological significance of carbohydrates, providing a strong foundation for advanced studies in organic chemistry and biochemistry.

This section details the various chemical transformations that monosaccharides can undergo, primarily due to the presence of aldehyde/ketone groups and hydroxyl groups.

Monosaccharides can be reduced to form polyhydroxy alcohols, known as alditols.