S. No
Entry
R
6Yield (%)
a
1
6a
Ph
92
2
6b
4-Me Ph
92
3
6c
3-OMe Ph
90
4
6d
3,4-diOMe Ph
90
5
6e
4-F Ph
86
6
6f
2-I Ph
88
7
6g
2,4-diCl Ph
86
8
6h
Me
94
9
6i
Et
94
10
6j
Pentyl
92
a
Isolated yields
Table 2:
Synthesis of N1,N6-phenyl and N1,N6-alkyl putrescine bisamides.