Chapter 25: Problem 13
What is the meaning of the prefix deoxy- as it is used in carbohydrate chemistry?
Chapter 25: Problem 13
What is the meaning of the prefix deoxy- as it is used in carbohydrate chemistry?
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Get started for freeAmygdalin is a toxic component in the pits of bitter almonds, peaches, and apricots. (a) Name the two monosaccharide units in amygdalin and describe the glycosidic bond by which they are joined. (b) Account for the fact that hydrolysis of amygdalin in warm aqueous acid liberates benzaldehyde and HCN.
25.41 Why is cellulose insoluble in water?
In making candy or sugar syrups, sucrose is boiled in water with a little acid, such as lemon juice. Why does the product mixture taste sweeter than the starting sucrose solution?
An important technique for establishing relative configurations among isomeric aldoses and ketoses is to convert both terminal carbon atoms to the same functional group. This can be done either by selective oxidation or reduction. As a specific example, nitric acid oxidation of D-erythrose gives meso- tartaric acid (Section 3.4B). Similar oxidation of D-threose gives \((2 S, 3 S)\)-tartaric acid. Given this information and the fact that D-erythrose and D-threose are diastereomers, draw Fischer projections for D-erythrose and D-threose. Check your answers against Table 25.1.
Convert each chair conformation to an open-chain form and then to a Fischer projection. Name the monosaccharide you have drawn.
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