Table 3.
1H NMR Spectroscopic Data of Compounds 10, 16, and 19
| position | 10a | 16b | 19b |
|---|---|---|---|
| 4 | |||
| 5 | 6.79 s | 7.46 m | 8.06 d (2.4) |
| 6 | 7.46 m | 7.58 m | |
| 8 | 7.94 brs | 7.58 m | |
| 11 | 3.39 d (6.3) | 3.28 brs | 3.47 d (7.0) |
| 12 | 5.26 m | 5.14 m | 5.25 m |
| 14 | 1.67 s | 1.67 s | 1.75 s |
| 15 | 1.79 s | 1.76 s | 1.84 s |
| 16 | 4.12 d (6.3) | 3.40 brs | 3.58 d (6.9) |
| 17 | 5.26 m | 5.03 t (6.6) | 5.25 m |
| 19 | 1.65 s | 1.83 s | 1.87 s |
| 20 | 1.83 s | 2.04 m | 2.10 m |
| 21 | 2.00 m | 2.10 m | |
| 22 | 5.14 m | 5.04 m | |
| 24 | 1.57 s | 1.66 s | |
| 25 | 1.53 s | 1.56 s | |
| OH-1 | 13.45 s | 12.80 s | 13.10 s |
| OH-3 | 6.50 s | ||
| OMe-3 | 3.78 s | ||
| OMe-6 | 3.97 s | ||
| OMe-7 | 3.77 s | ||
| Me-4 | 2.30 s | ||
| OAc | 2.34 s | ||
| OAc | 2.33 s | ||
| 3' | 8.22 d (7.5) | ||
| 4' | 7.58 m | ||
| 5' | 7.65 t (7.5) | ||
| 6' | 7.58 m | ||
| 7' | 8.22 d (7.5) |
a
Data (δ) measured in CDCl3 at 400 MHz.
b
Data (δ) measured in CDCl3 at 300 MHz. s = singlet, brs = broad singlet, d = doublet, t = triplet, m = multiplet. J values presented in Hz and omitted if the signals overlapped as multiplets.