Table 1.
Compound | δH (H-1) | δN (N-1) | Solvent |
---|---|---|---|
5a | 144.1 145.3 |
11.44 11.95 |
DMSO-d6 CDCl3 |
5b | 144.1 | 11.37 | DMSO-d6 |
5c | 144.1 | 11.36 | DMSO-d6 |
6b | 144.0 (N-1′) 151.6 |
11.43 (H-1′) 12.29 |
DMSO-d6 |
6d | 144.1 (N-1′) | 11.43 (H-1′) | DMSO-d6 |
6e | 143.2 (N-1′) 152.2 |
11.35 (H-1′) 12.29 |
DMSO-d6 |
6f | 143.2 (N-1′) 151.5 |
11.36 (H-1′) 12.22 |
DMSO-d6 |
(Compounds not shown were too insoluble for H-N correlation experiments).