Table 3.
1H NMR (600 MHz) and 13C NMR (150 MHz) data for compounds 11-13 in DMSO-d6.
| Position | 11 | 12 | 13 | |||
|---|---|---|---|---|---|---|
| δC | δH | δCa | δH | δC | δH | |
| 1 | 161.7 | 161.6 | 161.5 | |||
| 2 | 111.8 | 6.11, d (9.6) | 112.1 | 6.13, d (9.6) | 112.7 | 6.20, d (9.6) |
| 3 | 149.0 | 7.40, d (9.6) | 147.8 | 7.41, d (9.6) | 144.7 | 7.56, d (9.6) |
| 4 | 113.1 | 115.1 | 119.2 | |||
| 5 | 159.2 | 158.3 | 157.6 | |||
| 6 | 36.4 | Hα: 2.39, dd (4.2, 14.4) | 25.0 | Hα: 2.30, m | 66.2 | 4.47, t (6.6) |
| Hβ: 2.28, dd (8.4, 14.4) | Hβ: 2.36, m | |||||
| 7 | 71.3 | 3.42, m | 38.8 | 1.45, q (7.2) | 39.1 | Hα: 1.41, m |
| Hβ: 1.58, m | ||||||
| 8 | 29.6 | Hα: 1.42, m | 64.8 | 3.55, m | 18.3 | Hα: 1.21, m |
| Hβ: 1.33, m | Hβ: 1.32, m | |||||
| 9 | 10.1 | 0.89, dd (7.2, 7.8) | 23.6 | 1.07, d (6.0) | 13.9 | 0.87, t (7.2) |
| 10 | 17.3 | 2.19, s | 16.8 | 2.19, s | 16.6 | 2.21, s |
| 6-OH | 5.16, br s | |||||
| 7-OH | 4.56, d (5.4) | |||||
| 8-OH | 4.48, d (4.8) | |||||
a
Determined from HSQC and HMBC spectra