Table 1.
1H-NMR data (CDCl3) of 1–3 a.
| position | 1 δH (mult., J in Hz) | 2 δH (mult., J in Hz) | 3 δH (mult., J in Hz) |
|---|---|---|---|
| 1 | – | – | – |
| 2 | 7.48, d (1.8) | 7.66, d (1.2) | 7.65, d (1.2) |
| 3 | – | – | – |
| 4 | 7.50, dd (7.8, 1.8) | 7.65, dd (7.8, 1.2) | 7.67, dd (7.5, 1.2) |
| 5 | 7.10, d (7.8) | 7.18, d (7.8) | 7.13, d (7.5) |
| 6 | – | – | – |
| 7 | – | – | – |
| 8 | 2.43, ddd (13.8, 3.6, 0.6) 1.70, m |
2.42, t (7.8) | 5.76, t (7.2) |
| 9 | 1.74, m 1.64, m |
1.39, m | 1.81, m |
| 10 | 1.54, m | 1.18, m | 1.19, m |
| 11 | – | 1.51, septet (6.6) | 1.45, m |
| 12 | 0.94, s | 0.83, d (6.6) | 0.77, d (6.6) |
| 13 | 1.28, s | 0.83, d (6.6) | 0.77, d (6.6) |
| 14 | 1.49, s | 5.45, s 5.19, s |
2.00, s |
| 15 | – | – | – |
| −OCH3 | 3.90, s | – | – |
| −OH | 9.26, s | – | – |
a
Measured at 600 MHz.