Concept explainers
(a)
Interpretation: The conversion of D-glucose into the given compound is to be predicted.
Concept introduction: The hydroxyl groups of monosaccharides are converted into the ether groups in presence of base and
(b)
Interpretation: The conversion of D-glucose into the given compound is to be predicted.
Concept introduction: The hydroxyl groups of monosaccharides are converted into the ether groups in presence of base and alkyl halide. The carbonyl group of aldoses can be reduced to alcohol using metal hydrides.
(c)
Interpretation: The conversion of D-glucose into the given compound is to be predicted.
Concept introduction: The
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Organic Chemistry
- Draw the structure of each type of compound. a. a D-aldotriose b. an L-ketohexose c. a four-carbon aldonic acidarrow_forwarda. How many stereogenic centers are present in α-D-galactose? b. Label the hemiacetal carbon in α-D-galactose. c. Draw the structure of β-D-galactose. d. Draw the structure of the polyhydroxy aldehyde that cyclizes to α- and β-D-galactose.arrow_forwardWhich monosaccharide is a-glucose? CH,OH CH,OH CH,OH CH,OH H. OH O. H. H. OH OH H. H. H. H. OH H. OH OH H. OH H. H H. H. H. B C OD OB OC OAarrow_forward
- In an aqueous solution, d-glucose exists in equilibrium with two six-membered ring compounds. a.Draw the structures of these compounds. b. Which of the six-membered ring compounds will be the major product?arrow_forwardDraw the structure of the following:a. D/L-glucose & D/L-fructoseb. α/β-D-glucopyranose & α/β-D-fructopyranosec. α/β-D-glucofuranose & α/β-D-fructofuranosearrow_forwardWhat two monosaccharides can be degraded to a. D-ribose? b. D-arabinose? c. L-ribose?arrow_forward
- Consider the tetrasaccharide stachyose drawn below. Stachyose is found in white jasmine, soybeans, and lentils. Because humans cannot digest it, its consumption causes flatulence.a. Label all glycoside bonds.b. Classify each glycosidic linkage as α or β and use numbers to designate its location between two rings (e.g., 1→4-β).c. What products are formed when stachyose is hydrolyzed with H3O+?d. Is stachyose a reducing sugar?e. What product is formed when stachyose is treated with excess CH3I, Ag2O?f. What products are formed when the product in (e) is treated with H3O+?arrow_forwardWhich statements are correct regarding the formation of maltose?A. Hydrolysis reaction between alpha-D-glucose and beta-D-glucoseB. Condensation reaction between alpha-D-glucose and beta-D-glucoseC. Condensation reaction between beta-galactose and beta-glucoseD. Hydrolysis of starch into a di-saccharide product a). A and B b). C and D c). B and D d). B and C e). B, C and Darrow_forwarda. In an aqueous solution, d-glucose exists in equilibrium with two six-membered ring compounds. Draw the structures of these compounds.b. Which of the six-membered ring compounds will be the major product?arrow_forward
- Which pairs of molecules are interconvertible via mutarotation? O a. D-glucose and D-fructose O b. D-glucose and D-galactose O c. D-glucose and D-glucosamine O d. a-D-glucose and B-D-glucosearrow_forwardAnswer the following questions about the carbohydrate erythrulose, an ingredient in sunless tanning agents. erythrulose a. Does erythrulose contain an aldehyde or ketone? b. Classify each hydroxyl group as 1 °, 2 °, or 3 °. c. What product is formed when erythrulose is treated with Tollens reagent? d. What product is formed when erythrulose is treated with K 2Cr 2O 7?arrow_forwardWhich structure of Erythrose is referred to by the given Fischer projection? A. L-Erythrose B. D-Erythrose но- -H HO H CH2OHarrow_forward
- Chemistry for Today: General, Organic, and Bioche...ChemistryISBN:9781305960060Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. HansenPublisher:Cengage Learning