Table 1.
1H and 13C NMR spectroscopic data for compound 16 in methanol-d4.
| Position | δHa (J/Hz) | δCb | Position | δHa (J/Hz) | δCb |
|---|---|---|---|---|---|
| 1 | 3.61 mc 4.06 dd (6.0, 9.4) |
70.8 | 1′′ | 4.72 d (7.8) | 105.4 |
| 2 | 2.35 mc | 41.3 | 2′′ | 3.69–3.75 m | 76.3 |
| 3 | 2.70 dd (14.0, 7.0) 2.82 dd (14.0, 7.0) |
36.1 | 3′′ | 3.69–3.75 m | 79.0 |
| 4 | 132.5 | 4′′ | 3.69–3.75 m | 72.1 | |
| 5 | 6.40 s | 107.8 | 5′′ | 3.79–3.90 m | 78.6 |
| 6 | 149.3 | 6′′ | 4.28 m 4.23 m |
70.8 | |
| 7 | 130.0 | 1′′′ | 4.28 d (8.0) | 105.0 | |
| 8 | 149.3 | 2′′′ | 3.79–3.90 m | 75.6 | |
| 9 | 6.40 s | 107.8 | 3′′′ | 3.79–3.90 m | 78.3 |
| 1′ | 3.69 m 3.90 dd (6.0, 11.0) |
63.1 | 4′′′ | 3.69–3.75 m | 71.8 |
| 2′ | 2.14 m | 44.0 | 5′′′ | 3.79–3.90 m | 78.8 |
| 3′ | 2.64 dd (11.0, 13.7) 2.81 dd (7.0, 13.7) |
36.3 | 6′′′ | 3.50 m | 62.0 |
| 4′ | 132.0 | 6-OMe | 3.72 s | 56.5 | |
| 5′ | 6.34 s | 107.7 | 8-OMe | 3.72 s | 56.5 |
| 6′ | 148.9 | 6′-OMe | 3.82 s | 56.7 | |
| 7′ | 130.1 | 8′-OMe | 3.82 s | 56.7 | |
| 8′ | 148.9 | ||||
| 9′ | 6.34 s | 107.7 |
Assignments were achieved by the analysis of the HMQC and HMBC experiments; J values (Hz) are given in parentheses. a 600 MHz. b 150 MHz. c Overlapped.