Table 2.
1H NMR data for 3–8 (δ in ppm, J in Hz).
| Pos. | 3 (in CDCl3) | 4 (in CDCl3) | 5 (in CDCl3) | 6 (in CD3OD) | 7 (in CD3OD) | 8 (in CD3OD) |
|---|---|---|---|---|---|---|
| 2a | 2.19, d (18.0) | 2.16, brs | 2.45, m | 2.88, ddd (18.6, 6.3, 0.9) | 8.11, s | |
| 2b | 2.12, d (17.6) | 2.30, dd (18.6, 1.7) | ||||
| 3 | 5.54, brs | 5.54, brs | 2.64, m | 5.14, dd (6.3, 1.5) | 5.24, d (5.0) | |
| 4a | 2.05, dt (13.2, 3.3) | |||||
| 4b | 1.91, m | |||||
| 5a | 2.28, m | 2.18, m | 6.13, q (1.7) | 2.15, m | 7.69, s | |
| 5b | 2.04, brd (17.4) | 2.12, m | 2.15, m | |||
| 6a | 1.72, dt (13.0, 5.0) | 1.73, dt (13.1, 5.2) | 4.66, q (6.7) | 4.97, q (6.9) | 4.26, t (8.8) | 2.83, t (7.4) |
| 6b | 1.60, ddd (12.9, 8.5, 6.4) | 1.60, dt (13.1, 6.7) | ||||
| 7 | 3.13, q (6.8) | 3.13, q (6.9) | 1.45, d (6.7) | 1.51, d (6.9) | 2.64, t (7.4) | |
| 8 | 1.29, d (7.1) | 1.29, d (7.1) | ||||
| 9 | 4.09, dd (8.1, 4.0) | |||||
| 10a | 1.26, s | 1.25, s | 1.93, m | |||
| 10b | 1.52, m | |||||
| 11 | 1.89, m | |||||
| 12 | 0.99, d (6.4) | |||||
| 13 | 0.97, d (6.3) | |||||
| 14 | 3.37, s |