Problem 2 (10 pts) D-allose is the C3 epimer of D-glucose. a) Draw the structure of methyl ẞ-D-allopyranoside b) Draw the structure of a disaccharide consisting of two units of D-allose connected by a a 1-3 glycosidic bond.
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- None6 CH2OH 4 OH 2 ОН 3 OH (d) Draw the hemiacetal that results from above acetal. (e) Draw the open chain equivalent of the sugar in part (d). (f) Classify the monosaccharide below as a D-sugar or an L-sugar. H ОН O. ОН CH2OH ОН ОН9 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.
- OWLV2 | Online teaching and learning resource from Cengage [Review Topics] A Fischer projection of a monosaccharide is shown below: H- HO Does it have the D or L configuration? Submit Answer H- CH2OH -OH C=O -H Classify this monosaccharide (e.g., aldotriose) -OH CH₂OH Retry Entire Group 9 more group attempts remainingatching an a 1,4 linkage a ẞ-1,4 linkage a nonreducing monosaccharide a reducing sugar a reducing disaccharide a deoxy sugar (A) (c) он CH₂OH (E) 1107 CHOH CHOH CH₂OH CH₂OH CHOH CH₂OH он On но- OF CHLOH HO Lot HO OH CH₂OH HO HOCH OH (F) OH (0)5. The Haworth projection of a simple sugar is given below. Note that the-OH group on the anomeric carbon can be either up or down. Using only this sugar, draw the Haworth projections of the following: a) an a-disaccharide with a B (1 3) glycosidic bond b) an a-disaccharide with an a (1→ 3) glycosidic bond c) a B-disaccharide with an a (1→4) glycosidic bond d) a B-disaccharide with an B (1 4) glycosidic bond CH2OH HO H H OH group can be either up or down OH H. OH H
- Need answer fast i'll rate upHO 15. (a) Identify the glycosidic bond in the following disaccharide. (b) Decide whether the compound is a non-reducing or reducing sugar. (c) Polysaccharide units are usually bonded together with a or 3 1, 6 or 1, 4 linkages. What linkage is used in the disaccharide shown below? (pis) но- HO HO H HO H HO CHO O 16. Draw the structure for 1,4-ß-D-galactopyranosyl-D-glucose. -OH -OH H но- 17. Assign an R/S designation to each chirality center in the following compound: ( CH₂OH HO O -OHm) 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 поч
- TomnaLS Page < 3 7. For each disaccharide, indicate whether the glycosidic linkage is a or ß. CH,OH CH,OH OH но OH OH ОН ОН CH2OH OH но OH CH 2 HO O OH OH OH Identify each Fischer projection as the D- or L-isomer.Please solve both3. Draw the Haworth projection of D-mannopyranose with a beta anomeric configuration: CHO HO -H HO -H H- -OH I -OH CH₂OH 4. Draw a trisaccharide consisting of a central D-mannopyranose with two additional mannopyranose residues linked to it: one o(1-6) and one (1-4):