20.2 Outline a procedure for separating a mixture

(c)
O
O
N R H 2N NH 2
O
NH
NH
O HN R
O
O
H
N NH 2
N R
20.4 Outline a preparation of benzylamine using the Gabriel synthesis.
O
N
H
O
KOH X
O
O
OH
ethanol
N
H
H
N
NH2 several steps
O
K
N
H
H
O
O
N
N
O
O
H
H
NH
NH
O
O
+
N
+ H 2N
O
O
H 2N R
H 2N NH 2
20.5 Show how you might prepare each of the following amines through reductive amination:
a) CH3(CH2)3CH2NH2
H
NH3,H2,Ni O
b) C6H5CH2CH(NH2)CH3
O
c) CH3(CH2)4CH2NHC6H5
d) C6H5CH2N(CH3)2
O
H
NH 3,H 2,Ni
H 2,Ni
NH 2
NH 2
N
H
N
H
N
H
NH 2
NH 2
R