The concept used to solve this problem is based on the Haworth projection of an organic compound.
The Haworth projection is basically used to represent sugars in the cyclic form. It tells which atom is above the plane and which is below the plane.
The Haworth structure can be drawn from the Fischer projection. The characteristics of Haworth projection is as follow.
The carbon atom is implicit type of atom in the Haworth structure. The carbon present on the 1 number is known as anomeric carbon.
Hydrogen atoms are present on carbon atom.
A thicker line represents the atoms which are closer to observer.
First write the Fischer projection of D-glucose as follow.
Now, assign numbers to each carbon in the structure as follow.
Now, from the Fischer projection draw the Haworth projection as follow.
The atoms on left side of Fischer projection will present on upper position in the six-membered ring and the atoms on right side will present lower position in the ring.
Ans:The Haworth projection of -D-galactose is as follow.
Draw the Haworth projection of alpha-D-galactose by labeling the pyranose ring. The anomeric carbon is shown....
Draw the Haworth projection of beta-D-fructose by labeling the furanose ring. The anomeric carbon is shown. Labels may be used more than once.
Complete the Haworth projection of -D-galactose by placing labels on the pyranose ring. Labels may be used more than once. Note, there are two different hydroxy labels-make sure the oxygen is next to the bond. Answer Bank HO OH H СН2ОН
Use the Haworth projection to draw D-ribose in the beta-furanose and alpha-pyranose forms.
Convert the Fischer projection to the Haworth projection of the B-pyranose form by moving the substituents to the appropriate positions. The anomeric carbon is shown. EK Cyclization } CH2OH Answer Bank CH,OH OH H
5 a) identify the anomeric carbon in the below molecule b) identify the thpe of ring pyranose or furanose c) identify if it is a or b 6 a) identify the anomeric carbon in the below molecule b) identify the thpe of ring pyranose or furanose c) identify if it is a or b 7 The structure of 6-carbon ketose sugar is shown. Draw the common cyclic structure of this structure (both a and b form) 8 Identify the relationship...
22. Convert the following Fisher projection into a Haworth projection. Draw only the alpha anomer (12 points) 21. Are the following pairs of carbohydrates the same, completely different, constitutional isomers or stereoisomers? (12 points at 3 points each) CHO CHO CHO сњон он OH он он CH2OH он он он он он но он но но он он CH2OH CH2OH он CHO CHO CHO сњон он он он он он но он но но Ho но он но он OH...
a. Braw an arrow pointing to the configurational carbon b. Put a box around the anomeric carbon. c. Put a triangle on any hemiacetal carbons. d. Circle any acetal carbons. но он Benzyl ß-D-arabinofuranoside 2. D-Galactose is the C(4) epimer of D-glucose a. Draw the Fischer projections of D-galactose and L-galactose. D-Galactose L-Galactose b. Draw a-D-galactofuranose. Be sure to clearly show the stereochemistry at each stereocenter. a-D-Galactofuranose c. Draw ß-D-galactopyranose in it's two possible chair conformations (draw one chair, then...
ÇI-lagl- (2 pts) Use the Fischer projection shown below for the sugar D-altrose to draw a Haworth projection of the beta- 2. pyranose form of this sugar. но -Н H- OH H- OH OH H- CH-ОН 1
1. Draw glucose B-D-glucose in a chair form, and circle the anomeric carbon. Why is the anomeric carbon significant? 2. Why is cyclization of sugars important? What does the concept of mutarotation indicate to us about dual roles of monosaccharides? Two part question: 3. Why are monosaccharides most commonly found in pyran and furan ring forms, rather than: A) other ring motifs -(think along the lines of: why NOT 3,4, or 7 membered rings)? B) in their linear form? 4....
organic chem 11. (a) (6 points) D-tagatose is shown below. Draw the Haworth projection for B-D-tagatopyranose. CH2OH EO HO НО. -OH CH2OH D-tagatose (b) (4 points) Draw Fischer projection for L-tagatose. CH2OH EO HO НО. -OH CH2OH D-tagatose