Table 1.
NMR data for 1 (600 MHz, acetone-d 6)
| Position | δ H (J in Hz) | δ C a type | HMBCb |
|---|---|---|---|
| 1 | 166.8, qC | ||
| 2 | 5.95, d (15.9) | 121.2, CH | 1, 3, 4 |
| 3 | 7.20, d (15.9) | 148.3, CH | 1, 2, 4, 8, 9 |
| 4 | 64.0, qC | ||
| 5 | 7.64, br s | ||
| 6 | 8.19, s | 160.9, CH | 4 |
| 7 | 7.34, br s | ||
| 8 | 170.6, qC | ||
| 9a | 2.67, dd (14.5, 7.3) | 35.2, CH2 | 3, 4, 8, 10, 11 |
| 9b | 2.99, dd (14.5, 7.3) | ||
| 10 | 5.04, t, (7.3) | 118.1, CH | 9, 12, 13 |
| 11 | 136.6, qC | ||
| 12 | 1.69, s | 26.1, CH3 | 10, 11, 13 |
| 13 | 1.62, s | 18.1, CH3 | 10, 11, 12 |
| 14 | 2.75, d (4.6) | 26.7, CH3 | 8 |
| 15 | 3.71, s | 51.7, CH3 | 1 |
aRecorded at 150 MHz
bHMBC correlations, optimized for 8 Hz, are stated from proton(s) to the indicated carbons