Lone matching question Match the following structures with their corresponding classifications. b) CH₂OH CH₂OH OH OH a OH OH OH OH OH OH HOCH HOCH2 CH₂OH HO OH OH OH OH OH 1st choice Aldopentose 2nd choice Aldohexose 3rd choice Ketohexose 4th choice Aldohexose A B C D
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- The compound is a(n) || CH3(CH2)14CO(CH2)29CH3 is steroid O wax O fatty acid oilThe image shows Fischer projections for the structures of four isomers of a ketopentose. CH₂OH CH₂OH CH₂OH ПА пс C=O D HOEC H HOECH CH,OH A C=O H➡ COH но-с-н CH₂OH Which of the structures are stereoisomers of B? B Which of the structures are diastereomers of D? C=O HOI-C-H HOI-C-H CH₂OH с 000 ΤΑ B HO D CH₂OH O Which of the structures are enantiomers of C? H HI COH D CH₂OHTwo sugars differing in configuration at a single asymmetric carbon atom are known as epimers. D-mannose is a C-2 epimer of glucose (Structure I), while D-galactose is a C-4 epimer of glucose. Structure Il and IIl are H- -OH но- -H H OH HO H но- H HO H H -OH H- -OH HO OH H -OH H- -OH H OH HO. HO, OH II II Which of the following represents an aldopentose? OH H O HO O HO H но н HO H но- HO H HO H HO- H OH H OH H OH H OH OH HO Он of но" HO O OH он III IV These are chemical messengers that are secreted by endocrine glands and carried through the bloodstream to target tissues. prostaglandin deoxysugar glycoside hormones Which of the following is NOT correctly paired? cellulose: beta-1,4-glycosidic linkage amylose: alpha-1,4-glycosidic linkage chitosan: alpha-1,4-glycosidic linkage cellubiose: beta-1,4-glycosidic linkage
- 2. How is each compound related to the simple sugar D-erythrose? Is it an enantiomer, diastereomer or identical? ОНС HO HOH C НО НОН С A с он E ОНС. CH₂OH OH CHO ОН CHO OH он OH D-erythrose CH₂OH ОНС НО HOH2C HO HOH C B D OH CH2OH ОН F CHO ОН CHO онThe 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.(d) Draw the structure of the expected product when monosaccharide B undergo mutarotation upon dissolving in water in the presence of Tollens reagent (AGNO3, NHẠOH). он OH O. OH OH OH monosaccharide B
- Classify the structures as being either an enantiomer, diastereomer or diastereomer/epimer of D-glucose. Structure A: CH H- -OH Structure B: но- H- H- OH Structure C: H- он H- -H D-Glucose: OH || CH CH CH он H- он но -H H- он но он но но- H- но H- OH OH но -- H- -H H -Ç-H Structure A: OH Structure B: OH Structure C: OH5. Consider the following pairs of structures. Identify the relationship between them (enantiomers, diastereomers, or identical compounds. HOH2C H OH H OH HO H Br H3C Н H H₂CH₂C CI Br H CHO CH3 I CH3 OH OHC Н H OH H OH Bell!! H3C, HO H Н.С H CH₂CH3 CH3 CI HỌ,H CH₂OH BrNH2 N CH2 CH2 The stereochemistry around this chiral carbon is: O cannot be determined. O Rand S OR OS
- How many stereogenic centers are present in the following compound? CH3CH₂CH₂CH2, H C=C H 1 02 H ||1) Name the following saccharides and designate each chiral center as (S) or ® Н. Н Н НО -OH OH -Н CH₂OH НО но OH Н H OH OHDraw the isomers for each aldotetrose and ketopentose in the figure below and designate each isomer as a D or L sugar and designate also the R and S in every chiral centers. Label the enantiomers and diastereomers respectively. CH,OH C=0 Н—С—ОН Н-С—ОН Н—С—ОН H-C-OH ČH,OH ČH,OH
