Table 3.
1H NMR spectroscopic data of compounds 5–7
| No | 5*a | 6*a | 7*a |
|---|---|---|---|
| 2 | 6.52, s | 6.65, s | 6.60, s |
| 4 | 5.63, br s | 5.96, br s | 6.49, br s |
| 5 | 6.48, br s | 6.19, br s | 5.60, br s |
| 7 | 6.85, s | 6.97, d (2.4) | 6.75, d (1.8) |
| 10 | 4.30, s | 4.39, d (3.0) | 4.25, s |
| 3-Me | 2.12, s | 2.30 s | 2.33 s |
| 2′ | 6.64, s | 6.57, s | 6.63, s |
| 4′ | 6.54, br s | 6.25, br s | 6.49, br s |
| 5′ | 5.78, br s | 6.19, br s | 5.71, br s |
| 7′ | 6.88, d (1.2) | 6.83, d (1.8) | 6.88, d (1.8) |
| 10′ | 4.32, s | 4.32, d (3.0) | 4.25, s |
| 3′-Me | 2.37, s | 2.20, s | 2.34, s |
| 6′-OMe | 3.78, s | 3.81, s | 3.72, s |
| 1″ | 4.64, d (7.2) | 4.67, d (7.8) | 4.89, d (7.8) |
| 2″ | 3.47, m | 3.49, m | 3.48, m |
| 3″ | 3.45, m | 3.46, m | 3.60, m |
| 4″ | 3.38, m | 3.44, m | 3.43, m |
| 5″ | 3.44, m | 3.55, m | 3.67, m |
| 6″ | 3.99, dd (1.8,10.8); 3.81, dd (5.4,10.8); |
4.00, dd (1.8,12.6); 3.79,dd (5.4,12.6) |
3.96, dd (1.8,12) 3.76, dd (5.4,12) |
| 1′′′ | 4.67, d (7.8) | 4.73, d (7.2) | 4.94, d (7.2) |
| 2′′′ | 3.58, m | 3.59, m | 3.50, m |
| 3′′′ | 3.45, m | 3.46, m | 3.58, m |
| 4′′′ | 3.44, m | 3.44, m | 3.39, m |
| 5′′′ | 3.54, m | 3.55, m | 3.69, m |
| 6′′′ | 3.95, dd (1.8,12); 3.73, dd (6.0,12) |
3.97, dd (1.8,12); 3.77,dd (6.0, 12) |
3.96, dd (1.8,12); 3.72,dd (6.0, 12) |
a 1H NMR data were measured in CD3OD at 600 MHz