272
Substituted Amino Acids. 15 N Chemical Shifts (δ in ppm relative to
CH 3 NO 2 )
Amino Sugars. 15 N Chemical Shifts (δ in ppm relative to CH 3 NO 2 )
N
H
OH
O
O
O
N
H
OH
O
O
N
H
OH
O
O
H 2 N
N
H
OH
O
O
H 2 N
O
HO
NH 3
+
OH
HO
Cl –
OH
O
HO
OH
NH 3
+
OH
HO
Cl –
N
N
H
NH 3
+
O
OH
HN
N
NH 3
+
O
OH
N
N
H
NH 3
+
O
O –
HN
N
NH 3
+
O
O –
N
N
H
NH 2
O
O –
HN
N
NH 2
O
O –
-337.8
-346.5
(H 2 O)
-269.6
(DMSO)
-355.1
-341.2
-266.6
(H 2 O)
-266.6
(H 2 O)
-269.0
(DMSO)
-350.4
(H 2 O)
-357.8
(H 2 O)
-348.1
(H 2 O)
-206.4
-204.0
-201.4
-148.0
-185.6
-162.0
O
HO
OH
HO
OH
NH 3
+ Cl –
O
HO
OH
HO
NH 3
+ Cl –
OH
fast
fast
fast
Heteronuclear NMR Spectroscopy
6