Table 1.
1H and 13C NMR (100 MHz) data of compounds 1−3 in CD3OD.
| Position | 1a | 2b | 3b | |||
|---|---|---|---|---|---|---|
| δc | δH (J in Hz) | δc | δH (J in Hz) | δc | δH (J in Hz) | |
| 2 | 154.9 | 8.08 s | 154.9 | 8.12 s | 155.2 | 8.21 s |
| 3 | 125.6 | 126.2 | 125.9 | |||
| 4 | 178 | 178.1 | 177.9 | |||
| 5 | 128.5 | 7.97 d (9.0) | 128.2 | 8.06 d (9.0) | 128.2 | 8.12 d (8.9) |
| 6 | 116.5 | 6.84 dd (9.0, 2.4) | 117.2 | 7.09 dd (9.0, 2.3) | 117.2 | 7.15 dd (8.9, 2.2) |
| 7 | 164.7 | 163.1 | 163.1 | |||
| 8 | 103.3 | 6.76 d (2.4) | 104.4 | 7.18 d (2.3) | 104.4 | 7.25 d (2.2) |
| 9 | 159.8 | 159.4 | 159.3 | |||
| 10 | 118.2 | 119.8 | 119.7 | |||
| 1′ | 126.7 | 124.1 | 125.9 | |||
| 2′, 6′ | 131.3 | 7.39 d (8.7) | 131.4 | 7.31 d (9.0) | 131.3 | 7.47 d (8.7) |
| 3′, 5′ | 117.5 | 7.05 d (8.7) | 116.3 | 6.78 d (9.0) | 117.4 | 7.13 d (8.7) |
| 4′ | 158.3 | 158.8 | 158.3 | |||
| 1″ | 97.6 | 5.62 br d (3.5) | 98.2 | 5.78 br d (3.6) | 97.6 | 5.69 br d (3.5) |
| 2″ | 32.1 | 2.03 ddd (12.8, 11.9, 3.6) | 32.9 | 2.07 ddd (13.2,12.0, 3.6) | 33.2 | 2.08 ddd (12.8, 12.0, 3.5) |
| 1.90 dd (12.8, 5.0) | 1.96 dd (13.2, 5.0) | 1.91 dd (12.8, 5.1) | ||||
| 3″ | 66.7 | 4.09 ddd (11.9, 5.0, 3.0) | 66.6 | 4.09 ddd (12.0, 5.0, 3.0) | 66.7 | 4.16 ddd (12.0, 5.1, 3.1) |
| 4″ | 72.1 | 3.55 br d (3.0) | 71.9 | 3.57 br d (3.0) | 71.9 | 3.62 m |
| 5″ | 68.6 | 3.89 q (6.6) | 69.3 | 3.86 q (6.6) | 69.3 | 3.91 m |
| 6″ | 18.4 | 1.10 d (6.6) | 17.2 | 1.12 d (6.6) | 17.2 | 1.18 d (6.2) |
| 1‴ | 98.2 | 5.84 br d (3.5) | ||||
| 2‴ | 32.9 | 2.12 ddd (13.1, 12.0, 3.5) | ||||
| 1.98 dd (13.1, 5.1) | ||||||
| 3‴ | 66.5 | 4.13 ddd (12.0, 5.1, 3.1) | ||||
| 4‴ | 72.1 | 3.62 m | ||||
| 5‴ | 68.6 | 3.95 m | ||||
| 6‴ | 17.2 | 1.16 d (6.2) | ||||
a 1H (600 MHz); b 1H (400 MHz).