Table 5.
Selected 1H, 13C and 15N NMR chemical shifts in ppm for compounds 1 and 7.
| 1a | 1b | 1c | 1d | 7a | 7b | 7c | 7d | |
|---|---|---|---|---|---|---|---|---|
| Quinolone | ||||||||
| N1 | – | – | – | – | – | – | 134.4 | – |
| C2 | 168.5 | 166.8 | 168.7 | 166.8 | 167.7 | 165.8 | 167.8 | 165.8 |
| C3 | 72.2 | 80.0 | 71.9 | 79.7 | 72.6 | 79.6 | 72.8 | 80.0 |
| C4 | 190.7 | 188.9 | 190.8 | 189.0 | 189.7 | 187.5 | 189.6 | 187.7 |
| C4a | 117.4 | 119.2 | 117.5 | 119.2 | 119.0 | 121.0 | 119.2 | 120.9 |
| C5 | 127.7 | 127.6 | 127.6 | 127.5 | 128.2 | 129.2 | 128.0 | 127.8 |
| C6 | 123.5 | 123.5 | 123.3 | 123.4 | 124.2 | 124.6 | 124.0 | 124.2 |
| C7 | 137.3 | 137.0 | 137.1 | 136.9 | 137.3 | 136.9 | 137.1 | 136.7 |
| C8 | 117.0 | 116.7 | 116.9 | 116.7 | 116.7 | 115.8 | 116.6 | 116.3 |
| C8a | 141.6 | 140.5 | 141.6 | 140.6 | 140.8 | 140.6 | 140.7 | 140.0 |
| Ring A | ||||||||
| N1A | – | – | – | – | – | – | 247.9 | – |
| N2A | – | – | – | – | – | – | 363.4 | – |
| N3A | – | – | – | – | – | – | 354.0 | – |
| C4A | 145.8 | 145.3 | 147.4 | 146.8 | 145.9 | 146.0 | 141.5 | 140.9 |
| C5A | 122.4 | 123.4 | 123.7 | 124.8 | 122.5 | 122.3 | 126.0 | 127.1 |
| H5A | 8.89 | 8.49 | 8.26 | 7.77 | 8.89 | 7.26 | 8.46 | 8.15 |