Table 2.
NMR data for compounds 1 and 2 (400 MHz for 1H and 100 Hz for 13C, CDCl3).
| 1 | 2 | |||
|---|---|---|---|---|
| No. | δC, type | δH (J in Hz) | δC, type | δH (J in Hz) |
| 1 | 52.06 | 3.68, d (3.5) | 129.59 | 6.39, d (10.0) |
| 2 | 55.06 | 3.42, ddd (3.2, 2.4, 0.7) | 127.18 | 6.08, ddd (10.0, 5.3, 1.0) |
| 3 | 73.43 | 4.12, dd (2.7, 2.5) | 71.38 | 3.95, ddd (5.6, 3.6, 2.0) |
| 4α | 19.72 | 2.91, dt (14.1, 3.1) | 23.46 | 3.13 ddt (13.6, 4.2, 2.4) |
| 4β | 19.72 | 1.54, ddd (13.8, 13.8, 2.9) | 23.46 | 1.72 ddd (13.7, 13.7, 4.0) |
| 4a | 72.59 | 3.51, dd (13.4, 3.6) | 74.14 | 3.74, dd (13.2, 4.3) |
| 6α | 67.56 | 4.83, dd (15.7, 1.8) | 76.55 | 4.84, d (15.6) |
| 6β | 67.56 | 4.68, d (15.7) | 76.55 | 4.72, d (15.6) |
| 6a | 122.33 | - | 121.71 | - |
| 7 | 106.40 | 6.57, s | 106.44 | 6.54, s |
| 8 | 147.13 | - | 147.20 | - |
| 9 | 147.79 | - | 147.79 | - |
| 10 | 102.49 | 6.90, s | 102.98 | 6.81, s |
| 10a | 133.92 | - | 134.75 | - |
| 10b | 43.95 | - | 46.60 | - |
| 11endo | 35.64 | 1.99, ddd (12.4, 9.4, 5.1) | 40.02 | 2.11, ddd (12.5, 8.0, 6.0) |
| 11exo | 35.64 | 2.79, ddd (12.4, 12.4, 6.9) | 40.02 | 2.26, ddd (12.2, 10.8, 8.6) |
| 12endo | 67.56 | 3.81, ddd (12.8, 9.4, 7.0) | 68.97 | 3.88, m |
| 12exo | 67.56 | 3.73, dddd (12.5,12.5, 5.0, 2.2) | 68.97 | 3.85, m |
| OCH2O | 101.58 | 5.99, d (1.3), 5.98 d (1.3) | 101.51 | 5.95, d (1.3), 5.93 d (1.3) |
| OMe | 57.92 | 3.47, s | 57.23 | 3.39, s |