Concept explainers
(a)
Interpretation:
A sugar that is
Concept Introduction:
Epimer: Epimer is one of a pair of stereoisomers. Epimers are the monosaccharides which differ in the structure at only one of the asymmetric center and they are particular kind of stereoisomers that are not enantiomers. For example,
b)
Interpretation:
A sugar that is
Concept Introduction:
Epimer: Epimer is one of a pair of stereoisomers. Epimers are the monosaccharides which differ in the structure at only one of the asymmetric center and they are particular kind of stereoisomers that are not enantiomers. For example,
c)
Interpretation:
A sugar that is
Concept Introduction:
Epimer: Epimer is one of a pair of stereoisomers. Epimers are the monosaccharides which differ in the structure at only one of the asymmetric center and they are particular kind of stereoisomers that are not enantiomers. For example,
d)
Interpretation:
A sugar that is
Concept Introduction:
Epimer: Epimer is one of a pair of stereoisomers. Epimers are the monosaccharides which differ in the structure at only one of the asymmetric center and they are particular kind of stereoisomers that are not enantiomers. For example,
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EP ESSENTIAL ORG.CHEM.-MOD.MASTERING
- m) 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_forwardLabel the anomeric carbon for D- ribosearrow_forwardIs the ring a pyranose or a furanose ring for D-Ribosearrow_forward
- a. 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_forwardDonarrow_forwardFor D-lyxose i. Draw an epimer at C3. ii. Draw a diastereomer that is not an epimer. iii. Draw the anomers of -D-lyxofuranose and -D-lyxopyranose. iv. Draw the product as Haworth projection when reacted with methanol catalysed by acid.arrow_forward
- ОН 2. the Fischer projection that corresponds to the monosaccharide shown in the box. О н HO OH но- OH НО 0 OH OH OH H-OH -ОН 3. the Haworth projection that corresponds to the structure shown in the box. OCH, НО OH athul algasida О Н H-OH H-OH но-н но- HO -O OCH, OH O H H-OH НО-Н H-OH H-OH OH ОН НО НО OOCH, HO H-OH но-н но-н OH H-OH OH НО OH OCH, OH OH О н H-OH H-OH H НО но-н ОН НО -oOCH, ОН он онarrow_forward6. The Fischer projection for fructose is shown below. Is it a D-sugar or an L-sugar? a. It is a D-sugar because the hydroxyl at carbon A is to the right. b. It is a D-sugar because the carbonyl at carbon B is to the right. c. It is a D-sugar because the hydroxyl at carbon C is to the right d. It is an L-sugar because the carbonyl at carbon B is to the right. e. It is an L-sugar because the hydroxyl at carbon C is to the right. ACH2OH BFO H OH H OH H-OH CH2OH 7. Which of the following tynes of carbohydrates can be hydrelvzed to givo smaller molecules?arrow_forwardNeed answer fast i'll rate uparrow_forward
- Which one is b-D glucose and which one is a-L glucose ? 2. Which one is b-fructose and which a-L fructose?arrow_forwardDraw Fischer projection of the mirror image (enantiomer) D-robose c. Are these molecules superimposable? d. What type of isomerism is represented by these mirror images? e. Construct a model of a third isomer that is not a mirror image of the two above.arrow_forwardDraw Haworth projection formulas for the a-anomer of monosaccharides with each of the following Fischer projection formulas. a. CHO HOH H- HO- H -ОН -Η OH CH₂OH b. CHO H -OH H -ОН HO H CH₂OHarrow_forward
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