Table 1.
1H and 13C NMR Spectroscopic Data of Compounds 1 and 2a
| position | 1 |
2 |
||
|---|---|---|---|---|
| δH, (J in Hz) | δC | δH, (J in Hz) | δC | |
| 1 | 5.04, d (7.2) | 79.7 | 5.04, d (7.2) | 79.7 |
| 2 | 3.90, dd (14.4, 6.6) | 50.4 | 3.90, dd (14.4, 6.6) | 50.2 |
| 3 | 4.27, d (14.4) | 55.0 | 4.28, d (14.4) | 55.0 |
| 3a | 101.9 | 101.9 | ||
| 4a | 160.4 | 160.6 | ||
| 5 | 6.48, d (1.8) | 92.7 | 6.48, d (1.8) | 92.9 |
| 6 | 160.0 | 160.0 | ||
| 7 | 6.40, d (1.8) | 95.2 | 6.40, d (1.8) | 95.4 |
| 8 | 157.1 | 157.1 | ||
| 8a | 109.6 | 109.6 | ||
| 8b | 93.3 | 93.4 | ||
| 1′ | 126.6 | 126.6 | ||
| 2′,6′ | 7.09, d (9.0) | 129.0 | 7.09, d (9.0) | 129.0 |
| 3′,5′ | 6.69, d (9.0) | 112.8 | 6.69, d (9.0) | 112.8 |
| 4′ | 158.8 | 158.8 | ||
| 1″ | 136.7 | 136.7 | ||
| 2″,6″ | 6.84, m | 127.8 | 6.85, m | 127.8 |
| 3″,5″ | 7.05, m | 127.8 | 7.05, m | 127.8 |
| 4″ | 7.05, m | 126.6 | 7.06, m | 126.6 |
| 1‴ | 5.40, brs | 93.5 | 5.36, brs | 92.7 |
| 2‴ | 4.65, d (1.2) | 98.8 | 4.63, d (1.2) | 98.9 |
| 3‴α | 4.04, brd (12.0, 3.0) | 66.5 | 4.24, dd (11.4, 1.8) | 67.2 |
| 3‴β | 4.01, t (11.0) | 3.82, t (11.4) | ||
| 4‴ | 4.18, brd (10.2) | 68.3 | 4.05, ddd (9.6, 7.8, 1.8) | 67.4 |
| 5‴ | 3.70, brs | 70.2 | 3.58, dd (10.8, 6.0) | 71.2 |
| 6‴ | 3.66, d (10.8) | 63.7 | 3.59–3.61, m | 62.7 |
| 3.68, d (10.8) | 3.74, brd (10.8) | |||
| COOCH3-2 | 170.6 | 170.6 | ||
| 3.65, s | 52.1 | 3.65, s | 52.1 | |
| OCH3-8 | 3.87, s | 56.0 | 3.87, s | 56.0 |
| OCH3-4′ | 3.72, s | 55.1 | 3.72, s | 55.1 |
| OCH3-2‴ | 3.63, s | 57.4 | 3.63, s | 57.3 |
a
1H NMR spectrum measured at 600 MHz, 13C NMR spectrum measured at 150 MHz; obtained in CDCl3 with TMS as internal standard. Assignments supported with HSQC and HMBC NMR spectra.