Following cyclization, carbon #2 in an aldose would be carbon # in the sugar ring.
The number of carbon atoms outside the ring of an aldose is? A) 1 B) 2 C) 3 D) 4
is the following sugar an aldose or ketose? why? what carbon is its anomeric carbon? is this sugar d or l? which structure (a-d) describes its beta- anomer? Н CH OH CH2OH CH OH -оон CH2OH ОН о ОН ₂ ООН ОН ОН ОН HO-31 ОН ОН ОН ОН ОН Нота-Н -Н НА-ОН Н -ОН 6CHOH ОН ОН ОН ОН A в D
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...
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....
Number the carbon atoms in the following 5-carbon sugar. Number the carbon atoms in the following 5-carbon sugar. OH OH VI. IV. VII. II. A B C D V. CE
Ribose is a 5-carbon sugar molecule and an essential part of DNA and RNA. It has the following chemical structure as 6-membered ring: OH 1) Determine its sum formula: 2) Mass spectrum: what is the M* signal? 3) Name functional group A: 4) Name functional group B: 5) What is the approx. pka of functional group C: 6) Functional group A is a reaction of two entities. In this case the reagents are tethered and thus forming a ring. What...
The following compound results from base-catalyzed aldol cyclization of a 2-substituted cyclohexanone. Starting with the diketone, propose a mechanism for the cyclization. o
1. Below is a monosaccharide in its cyclic (ring) form. OH он Linear form OH a) Is the monosaccharide the a-or the B-anomer? b) Label each carbon with its carbon number. c) Draw the linear form of this monosaccharide with the correct chirality in the box at right. 2. a) Draw the linear form of D-ribose: b) Ribose can form a pyranose ring. Draw an electron arrow on your linear ribose drawing above, indicating which nucleophile attacks which electrophile to...
charge density on carbons of the benzene ring: carbon 1: electrostatic = -0.144 carbon 2: electrostatic = -0.081 carbon 3: electrostatic = -0.152 carbon 4: electrostatic = -0.086 carbon 5: electrostatic = -0.148 carbon 6: electrostatic = -0.094 Questions 1. Viewing the map of electron density with electrostatic potential, what areas of the molecule have the most positive and negative charge? What atom or atoms carry the most positive charge? What atom or atoms carry the most negative charge? Which...
Which of the following compounds is/are chiral? Look carefully at each carbon in the ring.