TABLE 1.
1H NMR data of compounds 1 and 2 in CD3OD and of compounds 3 and 4 in CDCl3 (500 MHz).
| Position | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1 | — | — | — | — |
| 2 | 5.02, m | 2.25, m | 1.77, dd (14.0, 5.7) | 2.20, m |
| — | — | 1.51, m | 1.38, d (2.6) | |
| 3 | 2.44, ddt (16.5, 7.9, 2.2) | 1.99, m | 1.59, dd (12.6, 5.7) | 2.24, m |
| 2.33, dq (16.5, 2.4) | 1.72, m | 1.40, td (12.6, 5.8) | 1.64, m | |
| 4 | 2.58, m | 2.71, m | 2.17, m | 2.54, m |
| 5 | 2.94, m | — | 1.20, m | — |
| 6 | 1.73, d (12.7) | 1.93, m | 1.85, m | 3.01, d (12.1) |
| 1.42, ddd (12.7, 7.7, 3.6) | 1.28, d (9.6) | 1.25, m | — | |
| 7 | 1.78, m | 1.76, m | 1.64, m | 2.38, td (12.1, 4.3) |
| 8 | 1.96, m | 2.36, m | 1.48, dd (5.8, 3.0) | 1.27, overlapped |
| 1.54, m | 1.71, m | 1.32, m | — | |
| 9 | 1.66, m | 1.73, m | 1.87, m | 1.95, tt (13.7, 3.8) |
| 1.52, m | 1.70, m | 1.06, m | 1.38, m | |
| 10 | — | — | — | 1.73, m |
| 11 | — | — | — | 1.10, d (7.2) |
| 12 | 0.80, s | 0.91, s | 1.07, s | — |
| 13 | 0.90, s | 0.91, s | 1.07, s | 4.65, m |
| — | — | — | 4.50, s | |
| 14 | 4.01, dd (9.0, 6.0) | 3.97, dd (9.2, 4.9) | 0.84, s | 1.80, s |
| 3.26, d (6.0) | 3.27, m | — | — | |
| 15 | 1.02, s | 0.93, s | 3.89, dd (14.0, 7.7) | 1.20, d (7.3) |
| — | — | 3.87, dd (14.0, 7.0) | — | |
| 16 | — | — | — | — |
| 17 | — | — | 2.04, s | — |
| 1′ | 4.22, d (7.9) | 4.23, d (7.9) | — | — |
| 2′ | 3.16, dd (9.0, 7.9) | 3.16, dd (9.0, 7.9) | — | — |
| 3′ | 3.27, dd (7.9, 4.0) | 3.26, dd (7.9, 4.0) | — | — |
| 4′ | 3.26, m | 3.27, m | — | — |
| 5′ | 3.35, m | 3.34, m | — | — |
| 6′ | 3.86, dd (11.8, 1.7) | 3.86, dd (11.9, 1.8) | — | — |
| 3.66, dd (11.8, 5.2) | 3.66, dd (11.9, 5.3) | — | — |