Table 2.
1H and 13C NMR spectroscopic data for compounds 2 (DMSO-d6, 400, 100 MHz) and 3 in (CD3OD, 600, 150 MHz).
| Position | 2 | 3 | ||
|---|---|---|---|---|
| δH (J in Hz) | δC | δH (J in Hz) | δC | |
| 2 | – | 149.6 | – | 130.8 |
| 3 | 4.70, d (11.2) | 59.3 | 4.59, d (11.4) | 53.2 |
| 5 | a. 4.48, d (14.8) b. 4.32, d (14.0) |
47.4 | 3.37, m 3.69, m | 42.7 |
| 6 | – | 111.9 | 2.98, m, 3.07, m | 19.6 |
| 7 | – | 172.1 | – | 107.0 |
| 8 | – | 126.2 | – | 127.8 |
| 9 | 7.51, d (2.8) | 104.1 | 6.91, d (2.4) | 101.2 |
| 10 | – | 155.5 | – | 155.6 |
| 10-OCH3 | 3.82, s | 55.4 | 3.748, s | 56.2 |
| 11 | 7.30, dd (2.8, 8.8) | 121.7 | 6.74, dd (2.4, 9.0) | 113.6 |
| 12 | 7.58, d (8.8) | 120.5 | 7.15, d (9.0) | 113.0 |
| 13 | – | 135.4 | – | 133.3 |
| 14 | α. 1.98, m β. 2.49, m | 28.3 | α. 2.17, m β. 2.28, m | 34.8 |
| 15 | 3.26, m | 23.7 | 3.03, m | 32.4 |
| 16 | – | 108.9 | – | 109.0 |
| 17 | 7.04, d (2.4) | 145.0 | 7.76, s | 156.8 |
| 18 |
trans. 5.47, d (16.8) cis. 5.34, d (10.8) |
120.7 |
trans. 5.31, d (17.4) cis. 5.23, d (10.2) |
119.8 |
| 19 | 5.79, m | 132.3 | 5.81, m | 135.4 |
| 20 | 2.63, m | 43.6 | 2.70, m | 45.4 |
| 21 | 5.39, s | 94.9 | 5.81, d (9.0) | 97.3 |
| 22 | – | 163.9 | – | 171.2 |
| 22-OCH3 | – | – | 3.753, s | 52.6 |
| 1' | 4.55, d (7.6) | 97.8 | 4.75, d (7.8) | 100.4 |
| 2' | 3.03, m | 73.2 | 3.18, m | 74.7 |
| 3' | 3.26, m | 77.3 | 3.40, m | 78.0 |
| 4' | 3.07, m | 70.1 | 3.26, m | 71.7 |
| 5' | 3.05, m | 76.7 | 3.35, m | 78.8 |
| 6' | 3.45, d (6.4, 12.0) 3.70, d (12.0) |
61.2 | 3.59, dd (6.6, 12.0) 3.93, d (12.0) |
63.0 |