Concept explainers
Interpretation:
Based on Fischer proof, the aldopentoses structures and aldehexose structures that could be ruled out for
Concept introduction:
Aldoses and ketoses can be oxidized using nitric acid. Upon oxidation, both carbon atoms, at the end, are oxidized to
In carbohydrate chemistry the chain contraction method for aldoses is Wohl degradation. In this reaction, the carbon chain is reduced by one. By using this reaction,
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Organic Chemistry: Principles and Mechanisms (Second Edition)
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- The structures of 4 isomers of ketopentose are shown. 1) which of the structures are diastereomers of structure A? C, B, or D 2) which of the structures are enantiomers of structure C? B, A, or D 3) which of the structures are stereoisomers of strcuture A?C, D, or Barrow_forwardPart 1 Show the complete steps and products of the Haworth Projection structure of the following saccharides. The males have to answer the structure of D-fructose and the females are the structure of D-galactose. Expanded structure of the given molecule Fischer Projection Haworth's structure [show the complete steps] Step 1 Step 2 Step 3 Part 2 Show the synthesis of disaccharide lactose. Give the expanded structure of the reactants. Give the expanded structure of the products. Part 3. Show the chemical reaction of D-ribose. Name the chemical reaction. Show here the chemical equation and name the products. Use the expanded structure. 1. 2. 3.arrow_forwardDraw the structure of the disaccharide maltose (-D-glucopyranosyl (1→4)-D-glucopyranose). Indicate with arrows the reducing end and the acetal functional group.arrow_forward
- The structure of 4 isomers of ketopentose are shown. 1) select every structure that is a diastereomer of structure D A, B, or C? 2) select every structure that is a enantiomer of structure C A, B, or D 3) select every structure that is a stereoisomer of structure C A, B, or Darrow_forwardThe most stable conformation of the pyranose ring of most D-aldohexoses places the largest group, CH2OH, in the equatorial position. An exception to this is the aldohexose D-idose. Draw the two possible chair conformations of either the a or ß anomer of D-idose. Explain why the more stable conformation has the CH2OH group in the axial position.arrow_forward
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