Table 2.
1H, 13C NMR data, COSY, and HMBC correlations of 3.
| Position | δH a (J in Hz) c | δC b (mult.) d | COSY | HMBC |
|---|---|---|---|---|
| 1 | 2.13, m | 34.5 (CH) | H-2, 14 | C-3, 16 |
| 2 | 1.78, m; 1.38, m | 30.7 (CH2) | H-1, 3 | C-1, 3, 14, 15 |
| 3 | 2.74, dd (7.5, 6.5) | 61.9 (CH) | H-2 | C-2 |
| 4 | 58.8 (C) | |||
| 5 | 2.44, d (7.5) | 41.2 (CH2) | H-6 | C-3, 4, 6, 7, 18 |
| 6 | 6.73, m | 142.2 (CH) | H-5, 7 | C-4, 5, 7, 8 |
| 7 | 6.12, d (16.0) | 134.0 (CH) | H-6 | C-8 |
| 8 | 198.3 (C) | |||
| 9 | 1.82, m | 20.8 (CH2) | H-10, 17 | C-15 |
| 10 | 2.05, m; 1.68, m | 34.1 (CH2) | H-9 | C-9, 11, 12 |
| 11 | 85.3 (C) | |||
| 12 | 84.7 (C) | |||
| 13 | 2.10, m; 1.72, m | 30.4 (CH2) | C-11, 12 | |
| 14 | 1.96, m; 1.22, m | 25.8 (CH2) | C-12, 15 | |
| 15 | 60.9 (C) | |||
| 16 | 177.6 (C) | |||
| 17 | 2.26, m; 1.66, m | 28.4 (CH2) | H-9 | C-1, 15, 16 |
| 18 | 1.28, s | 17.2 (CH3) | C-3, 4, 5 | |
| 19 | 2.26, s | 27.0 (CH3) | C-7, 8 | |
| 20 | 1.39, s | 18.7 (CH3) | C-11, 12, 13 |
a Spectra recorded at 500 MHz in CDCl3. b Spectra recorded at 125 MHz in CDCl3. c J values (in Hz) in parentheses. d Attached protons were deduced by DEPT experiments.