Table 2.
1H and 13C NMR data for compound 1 and 2 (600 MHz and 150 MHz, respectively, CDCl3, 30 °C).
| Positions. | Compound 1 | Compound 2 | ||
|---|---|---|---|---|
| 13C | 1H | 13C | 1H | |
| 1 | 169.9 | — | 170.8 | — |
| 2 | 128.7 | — | 128.5 | — |
| 3 | 143.4 | 6.13 (d, 10.0 Hz) | 143.6 | 6.17 (d, 10.0 Hz) |
| 4 | 30.6 | 2.59 (m) | 30.7 | 2.60 (m) |
| 5 | 44.3 | 1.33 (m) | 44.4 | 1.35 (m) |
| 1.13 (m) | 1.14 (m) | |||
| 6 | 32.4 | 1.25 (m) | 32.4 | 1.26 (m) |
| 7 | 30.1 | 1.29 (m) | 30.0 | 1.31 (m) |
| 1.11 (m) | 1.15 (m) | |||
| 8 | 11.4 | 0.86 (t, 7.3 Hz) | 11.4 | 0.86 (t, 7.3 Hz) |
| 9 | 12.8 | 1.86 (s) | 12.7 | 1.88 (s) |
| 10 | 20.9 | 0.98 (d, 6.7 Hz) | 21.0 | 0.99 (d, 6.7 Hz) |
| 11 | 19.4 | 0.83 (d, 6.4 Hz) | 19.3 | 0.84 (d, 6.4 Hz) |
| NH | — | 6.31 (m) | — | 6.02 (m) |
| 1′ | 35.1 | 3.61 (q, 5.6 Hz) | 39.1 | 3.44 (q, 4.3 Hz) |
| 2′ | 33.9 | 2.68 (t, 5.8 Hz) | 25.8 | 1.92 (m, 6.5 Hz) |
| 3′ | 173.8 | — | 31.7 | 2.44 (dd, 6.7, 7.4 Hz) |
| 4′ | — | — | 174.3 | — |