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(a)
To determine: The name of the given aldose.
Interpretation: The name of the given aldose is to be stated.
Concept introduction: The two diastereomeric sugars which differ only in the configuration at a single asymmetric carbon atom are known as epimers. Aldose is a monosaccharide which contains an
(b)
To determine: The name of the given aldose.
Interpretation: The name of the given aldose is to be stated.
Concept introduction: The two diastereomeric sugars which differ only in the configuration at a single asymmetric carbon atom are known as epimers. Aldose is a monosaccharide which contains an aldehyde carbonyl group.
(c)
To determine: The name of the given aldose.
Interpretation: The name of the given aldose is to be stated.
Concept introduction: The two diastereomeric sugars which differ only in the configuration at a single asymmetric carbon atom are known as epimers. Aldose is a monosaccharide which contains an aldehyde carbonyl group.
(d)
To determine: The name of the given aldose.
Interpretation: The name of the given aldose is to be stated.
Concept introduction: The two diastereomeric sugars which differ only in the configuration at a single asymmetric carbon atom are known as epimers. Aldose is a monosaccharide which contains an aldehyde carbonyl group.
(e)
To determine: The name of the given aldose.
Interpretation: The name of the given aldose is to be stated.
Concept introduction: The two diastereomeric sugars which differ only in the configuration at a single asymmetric carbon atom are known as epimers. Aldose is a monosaccharide which contains an aldehyde carbonyl group.
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Chapter 23 Solutions
Organic Chemistry (9th Edition)
- Which of the following best describes the disaccharide shown here? HO OH OH HO OH OH AmoH HO A. a-1,4' glycoside of D-glucose and D-galactose B. B-1,3' glycoside of D-glucose and D-galactose C. a-1,4' glycoside of D-galactose and D-glucose D. B-1,4' glycoside of D-gulose and D-galactose E. a-1,3' glycoside of D-allose and D-glucose F. a-1,3' glycoside of D-altrose and D-galactose G. a-1,3' glycoside of D-idose and D-idose H. B-1,3' glycoside of D-altrose and D-galactose O A OB OC OD OE OF OG OH F3 1-0 F4 FS MacBook Air FBarrow_forwardAnswer the following questions using the Haworth structure drawn below. Но. CH2 HO, ОН OH ОН a. Identify this monosaccharide. b. Is this the a or ß isomer. c. In solution the cyclic structure above can open and close to form the other isomer. Which structure below is the other isomer that is present in solution? I. II. III. CH2OH O OH CH2OH но -СН, о OH OH OH но CH2 -OH OH ÓH ÓH OHarrow_forwardChemistry the two sugars are aldo/keto hexos/pentos that has been ciclised to a fur/pyr anose. They are alfa/beta-anmore and are what kind of sugars CH2OH CH₂OH OH OH OH OH OH OH OHarrow_forward
- U3acclanue. b. simple sugar. с. disaccharide. d. polysaccharide. e. oligosaccharide. 12. Which of the following glycosidic linkages does the sugar shown below contain? CH2OH CH2OH OH OH OH OH OH OH a. B-(2→4) b. a-(1→4) с. В-(1—4) d. a-(2-4) e. a-(2→6)arrow_forward2. Identify the carbon atoms of the carbohydrate rings at which the oxidation takes place by circling the carbon atoms in the structure that become an aldehyde or ketone group. Note: do this for the reducing sugars only! H -OH H HO Po-glucose он HO OCH, methyl e-D-glucoside но. HO OH OH a-D-fructone он HO HO HO, H HỌ HO- OH Suarose HO- HO maltosearrow_forward43. Specify expressions specific to panaxosides. I. taken from ginseng II. there are glucose and arabinose monosaccharides in this compound III. taken from Japanese angelica-tree IV. tetratcyclic triterpen saponins V. spirostanol type glycoside VI. dimer structure VII. biglycosides VIII. dammaran group IX. differ for number of hydroxyl groups X. furostanol type glycoside A) II; VI; VII; IX; X B) III; V; VIII C) I; IV; VIII; IX D) I; VIII; IX E) I; III; V; VII; VIII; Xarrow_forward
- 4. An iterative approach to oligosaccharide synthesis involves the use of protected glycals (sugars with C1-C2 double bond) as shown below. The product from the reaction of the first glycal with DMDO under anhydrous conditions is treated with another suitably-protected glycal to form a disaccharide glycal, and the process can be repeated to form a trisaccharide glycal, and so on... Crucial to the success of this approach is the stereoselective formation of the intermediate A in the scheme below. Draw the structure of A. DMDO CH₂Cl2 A OH ZnCl₂, THF OHarrow_forwardm) Which pyranose ring (A, B, C, or D) in the tetrasaccharide below is derived from D-altrose? The Fischer projections for the four aldohexoses that make up this tetrasaccharide are shown below. B C D HOH CHO CHO CHO CHO HO+H HTOH Fонно н HOH HOH H-OH H-OH H-+-OH H-TOHHOH HOH H+OH HOHнтон нон CHOH CHOH CHOH CHOH De D-glue Dalose Datrone i NH Į HOH STEP 1 OH, HO- answer 1. Just add arrows and charges for steps 1, 2, and 3 in formation of this enamine з no arrows needed here OH н Н ЮН -OH STEP 3 :ÖH н H STEP 2 на это про за почarrow_forwardStudy Guide Chapter 13 1. Classify each of the following monosaccharides as an aldopentose, ketopentose, aldohexose, or ketohexose: 2 a. CH₂OH C=O H-C-OH | H-C-OH CH₂OH Ribulose b. H 0=0 H-C-OH HO-C-H | H-C-OH 1 H-C-OH | CH₂OH Glucose Classify the following monosaccharide, erythrose, as an aldotetrose, ketotetrose, aldopentose,arrow_forward
- Write the structure(s) for the organic product(s) of the carbohydrate reaction below. ball & stick v + labels HOCH2 Ag20 in aq. NH3 OH or Br2 in H20, pH 6 HO OH a-D-glucopyranose • Use the wedge/hash bond tools to indicate stereochemistry where it exists. If two diastereomers are formed, draw both. • If no reaction occurs, draw the organic starting material. Draw carboxylic acids in neutral (unionized) form. • Use “flat" representations of rings, not chairs, in your drawing. Do not draw your answer as a Haworth projection.arrow_forward4. D-glucose СНО H+OH H-HO НО-Н H-OH HO CH₂OH CH,OH OH .D-glucose но-2-ю CH₂OH НО H₂/Ni, LiAlH OH CHOR HO A glurreade hand 204010)arrow_forwardIdentify the sugar in each description. a. An aldopentose that is not d-arabinose forms d-arabinitol when it is reduced with NaBH4. b. A sugar that is not D-altrose forms d-altraric acid when it is oxidized with nitric acid. c. A ketose that, when reduced with NaBH4, forms d-altritol and d-allitol.arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage LearningChemistry for Today: General, Organic, and Bioche...ChemistryISBN:9781305960060Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. HansenPublisher:Cengage Learning
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