Table 2 NMR data for acetamidines 2, 4, 7 and 8.

2

2.20^a

7.96; 8.38

18.4

168.9

2.10^b

8.39; 8.90

4

2.18^a

8.03; 8.41

8.41

18.4

168.9

171.5

2.06^b

9.71

8.42

7

2.16^a

8.04; 8.38

18.4

168.8

173.8

8

2.32^a

8.00; 8.40

18.6

169.0

2.09^b

8.30; 8.84