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686 Chapter 20
Copyright © 2017 Pearson Education, Inc.
34.
a.
COOH
OH H
H HO
H HO
OH H
COOH
b.
COO
−
OH H
H HO
H HO
OH H
CH
2
OH
c.
CH
2
OH
OH H
H HO
H HO
OH H
CH
2
OH
d.
O
CH
3
O
CH
3
O
OCH
3
CH
3
O
CH
2
OCH
3
e.
COO
−
OH H
H HO
H HO
CH
2
OH
OH H
f.
O
OH
HO
OCH
2
CH
3
OH
CH
2
OH
O
OH
HO
OCH
2
CH
3
OH
CH
2
OH
+
g.
HC
H HO
H HO
OH H
CH
2
OH
O
35.
C-2 epimer
=
d-mannose
C-4 epimer
=
d-galactose
C-3 epimer
=
d-allose
C-5 epimer
=
l-idose
36.
a.
d-lyxose
b.
d-talose
c.
d-psicose
37.
HO H
H OH
CH
2
OH
D
-threose
HO H
H OH
CH
2
OH
D
-xylose
OH
H
sugar A
HO H
H OH
CH
2
OH
D
-lyxose
H HO
sugar B
+
C
H O
Kiliani–Fischer
synthesis
HNO
3
C
H O
C
H O
COOH
OH H
H HO
OH H
COOH
COOH
H HO
H HO
OH H
COOH
+
optically inactive
optically active
38.
a.
d-ribose and l-ribose, d-arabinose and l-arabinose, d-xylose and l-xylose, d-lyxose and l-lyxose
b.
d-ribose and d-arabinose, d-xylose and d-lyxose, l-ribose and l-arabinose, l-xylose and l-lyxose
c.
d-arabinose, l-arabinose, d-lyxose, and l-lyxose
39.
a.
2
R
,3
S
,4
R
,5
R
b.
2
R
,3
S
,4
S
,5
R
c.
2
R
,3
R
,4
R
d.
2
R
,3
S
,4
R
e.
3
R
,4
S
,5
R