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Comparison of 1H NMR Data for Literature and Synthetic-1.
| Compd 1 | Literaturea (CDCl3) | Synthetic (CDCl3 + EtOAc) | Synthetic (acetone-d6) |
|---|---|---|---|
|
| |||
| positionb | δH | δH | δH (J in Hz) |
| 3 | 6.70, br s | 7.29, d | 7.45, d (9.3) |
| 4 | 7.39, br s | 8.13, d | 8.25, d (9.3) |
| 7 | 7.16, br s | 6.44, d | 6.45, d (9.3) |
| 8 | 7.32, br s | 6.79, d | 6.90, d (9.0) |
| OH | – | 6.98, br s | 8.00, s |
| OH | – | 6.31, br s | 7.65, s |
| OMe | 4.02, s | 3.62, s | 3.68, s |
