Name:
BIOCHEMISTRY
HOMEWORK 1
Due: September 4, 2013
1.
Triglycerides are triesters of glycerol and fatty acids such as stearic acid, shown
below. Draw the structure of a triglyceride using glycerol and stearic acid as
building blocks.
O
HO
OH
OH
glycerol
2.
16
OH
stearic acid
Draw the following structures:
2.1.
Diphosphate of 2-phenylethanol
2.2.
A glycoside formed in a reaction between -D-glucopyranose and phenol
CHO
H
OH
HO
H
OH
H
OH
CH2OH
D-glucose
2.3.
An N-acetal formed in a reaction between -D-glucopyranose and pyrrole
N
H
pyrrole
2.4.
3.
An amide formed in a reaction between ethanolamine and acetic acid
Complete the following reactions
CHO
H
H
H
OH
H
OH
CH2OH
3.1.
OH
cpd 1
cpd 2
a five-membered hemiacetal
an acetal (glycoside)
Write the structures of two regioisomeric monophosphates of cpd 2 (from
above)
4.
Show how ethanol can be connected to tert-butyl alcohol via a phosphate linkage
5.
Carbonic acid shown below is unstable; it readily decomposes into carbon dioxide
and water. However, its derivatives can be prepared similar to those of any
carboxylic acid. Show the structure of a diester of carbonic acid (dialkyl
carbonate) and benzyl alcohol (2 equivalents)
O
HO
OH
OH
carbonic acid
benzyl alcohol