Table 1.
1H and 13C NMR spectroscopic data for compounds 1–3 (600 MHz, methanol-d4).
| Position | 1 | 2 | 3 | |||
|---|---|---|---|---|---|---|
| δH, mult (J in Hz) | δ C | δH, mult (J in Hz) | δ C | δH, mult (J in Hz) | δ C | |
| 2 | 3.14, dd (6.54, 11.87) | 52.5 | 3.28, m | 51.1 | 3.21, td (4.14, 7.43) | 54.2 |
| 3 | 1.63, qd (4.24, 6.54) | 42.7 | 1.68, m | 44.2 | 1.67, qd (5.46, 7.43) | 44.3 |
| 4 | 4.99, d, (4.24) | 47.8 | 4.66, d (3.55) | 50.7 | 4.70, d (5.46) | 50.8 |
| 4a | - | 122.5 | - | 121.2 | - | 123.3 |
| 5 | 7.08, d (7.47) | 128.6 | 7.08, dd (1.02, 7.82) | 131.7 | 7.04, d (7.51) | 129.5 |
| 6 | 6.50, m, overlap | 117.0 | 6.56, m, overlap | 117.8 | 6.56, m, overlap | 117.8 |
| 7 | 6.92, m | 128.9 | 6.96, m | 129.1 | 6.93, m | 128.8 |
| 8 | 6.50, m, overlap | 114.7 | 6.56, m, overlap | 115.6 | 6.56, m, overlap | 115.4 |
| 8a | - | 145.5 | - | 146.3 | - | 145.9 |
| 9 | 1.55, m | 38.3 | 1.53, m | 34.8 | 1.62/1.56, m | 37.4 |
| 10 | 1.46, m | 19.4 | 1.49/1.40, m | 20.4 | 1.52, m | 23.4 |
| 11 | 0.97, t (6.40) | 14.6 | 0.99, m, overlap | 14.5 | 0.97, t (7.55), overlap | 14.6 |
| 12 | 1.32, m | 20.7 | 1.44/0.99, m | 19.4 | 1.50/1.43, m | 19.6 |
| 13 | 1.00, t (6.61) | 12.2 | 0.99, m, overlap | 12.4 | 0.97, t (7.55), overlap | 10.5 |
| 15 | - | 161.8 | - | 161.0 | - | 162.2 |