Concept explainers
(a)
Interpretation: The given aldose is oxidized to optically inactive aldaric acid or not is to be identified.
Concept introduction: The
(b)
Interpretation: The given aldose is oxidized to optically inactive aldaric acid or not is to be identified.
Concept introduction: The aldehyde group and primary alcohol of aldoses oxidizes to carboxyl groups on treatment with warm
(c)
Interpretation: The given aldose is oxidized to optically inactive aldaric acid or not is to be identified.
Concept introduction: The aldehyde group and primary alcohol of aldoses oxidizes to carboxyl groups on treatment with warm
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ORGANIC CHEMISTRY CONNECT CODE
- How many chiral centers are in B-d-glucopyranose and a-D-galactopyranose? How many stereoisomers of these two aldohexoses can theoretically be drawn?arrow_forwardA D-aldohexose A is formed from an aldopentose B by the Kiliani–Fischer synthesis. Reduction of A with NaBH4 forms an optically inactive alditol. Oxidation of B forms an optically active aldaric acid. What are the structures of A and B?arrow_forwardIf anisole is allowed to sit in D2O that contains a small amount of D2SO4, what products are formed?arrow_forward
- Regarding the following monosaccharides, indicate the CORRECT alternative: a) Only Gulosa, Idosa and Mannose can produce alditols because they are aldoses. b) There is only one pair of epimers. c) The reaction of Idosa with HNO3 converts it into a product without optical activity. d) Only two monosaccharides will give a positive result with Fehling's reagent. e) Mutarotation converts D-psychose into an aldose.arrow_forwardThe anticoagulant heparin is a polysaccharide that contains alternating residues of -D- glucuronic acid-6- sulfate and N-sulfo-D-glucosamine-6sulfate connected by (1 B 4)- glycosidic linkages. Draw a part of heparin that shows one each of the two residues.arrow_forwardAldohexoses A and B are formed from aldopentose C via a Kiliani–Fischer synthesis. Nitric acid oxidizes A to an optically active aldaric acid, B to an optically inactive aldaric acid, and C to an optically active aldaric acid. Wohl degradation of C forms D, which is oxidized by nitric acid to an optically active aldaric acid. Wohl degradation of D forms (+)-glyceraldehyde. Identify A, B, C, and D.arrow_forward