Table 1.
Compd. | -R 1 | -R 2 |
---|---|---|
4a, 6a, 7a | -H | -H |
4b, 6b, 7b | 2-CH3 | -H |
4c, 6c, 7c | 3-CH3 | -H |
4d, 6d, 7d | -H | 4-CH3 |
4e, 6e, 7e | 2-CH3 | 4-CH3 |
4f, 6f, 7f | 2-CH3 | 5-CH3 |
4g, 6g, 7g | 2-CH3 | 6-CH3 |
4h, 6h, 7h | 3-CH3 | 4-CH3 |
4i, 6i, 7i | 3-CH3 | 5-CH3 |
4j, 6j, 7j | 2-CH2-CH3 | -H |
4k, 6k, 7k | -H | 4-CH2-CH3 |
4l, 6l, 7l | -H | 4-O-CH2-CH3 |