Concept explainers
Interpretation:
The Haworth projections of α-D-mannopyranose and β-D-mannopyranose has to be drawn.
Concept Introduction:
The cyclic representation of monosaccharides is known as Haworth projection. The five membered ring is said to be Furanose and six membered ring is said to be Pyranose. The five or six membered cyclic hemiacetals which have planar structure will be lying perpendicular to the plane of the paper.
In monosaccharides, the alcohol and carbonyl groups both are present. The two groups react with each other to form cyclic hemiacetals.
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Organic Chemistry
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- The 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_forwardHow many asymmetric carbons and stereoisomers are there for an aldohexose? For aketohexose?arrow_forwardOH НО HO OH НО Но OH ОН ОН OH What are the monosachharides that make up this trisaccharide? O a-D-glucopyranose, a-D-galactopyranose, a-D-fructofuranose a-D-glucopyranose, a-D-galactopyranose, B-D-fructofuranose a-D-glucopyranose, a-D-glucopyranose, B-D-fructofuranose a-D-galactopyranose, a-D-glucopyranose, a -D-fructofuranosearrow_forward
- The 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_forward9 A disaccharide consists of the molecules of D-glucose and D-glucosamine joined by a (1a, 1b)-glucosidic bond. a) Draw the structure of the disaccharide (Haworth projection) if you know that in D- glucose the anomeric carbon has an a-configuration. b) Give the name of the union you drew in question a. c) Draw the structure of the product (cantilever conformation) resulting from the effect of excess acetic anhydride and pyridine on the disaccharide. Hint: D-glucosamine has the same structure as D-glucose, but C-2 has an amino group instead of a hydroxyl.arrow_forwardDraw Haworth projections for each of the following molecules: (a) α-d-allopyranose, (b) β-d-allopyranose, (c) α-d-allofuranose, (d) β-d-allofuranose.arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage LearningOrganic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning