Organic Chemistry
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Galactose is the C4 epimer of glucose. Draw the structure of D-galactose in
a. Fischer projection.
b. Chair conformation of the β-pyranose anomer.
c. Haworth projection.
Show the structures of the sugar derivatives given below.
4-O-(β-D-glucopyranosyl)-D-galactopyranose
The cyclization of ribulose is shown below. Propose a mechanism for this cyclization, assuming a small amount of acid is present.
The brief treatment of a D-hexanose with a dilute base causes the isomerization of its carbonyl. The product is the C3 epimer of D-fructose. What is the structure of the furanose product?
Draw the structure(s) of the cyclic hemiacetal formed by the 4-hydroxyaldehyde, 4-hydroxyhexanal.
Draw the structure(s) of the cyclic hemiacetal formed by the 5-hydroxyaldehyde, 5-hydroxyhexanal.
Provide the structure(s) of the cyclic hemiacetal formed by the 4-hydroxyaldehyde, 4-hydroxy-5-methylhexanal.