Here R = Alkyl group
Ar = Aryl group
" />
A
r
/
R
-
C
O
-
N
H
2
+
B
r
2
+
4
N
a
O
H
↓
A
r
/
R
-
N
H
2
+
N
a
2
C
O
3
+
2
N
a
B
r
+
H
2
O
Here R = Alkyl group
Ar = Aryl group
" />
A
r
/
R
-
C
O
-
N
H
2
+
B
r
2
+
4
N
a
O
H
↓
A
r
/
R
-
N
H
2
+
N
a
2
C
O
3
+
2
N
a
B
r
+
H
2
O
Here R = Alkyl group
Ar = Aryl group
" />