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1H- and 13C-NMR data of compound 5 a.
| No. | 1H | 13C | No. | 1H | 13C |
|---|---|---|---|---|---|
| 1 | 176.37 s | 7 | 130.56 s | ||
| 2 | 2.57 d (15.8) 2.50 d (15.8) |
44.72 t | 8 | 4.44 s | 70.09 t |
| 3 | 71.07 s | 9 | 1.66 s | 13.83 q | |
| 4 | 1.61 m | 41.12 t | 10 | 1.29 s | 26.53 q |
| 5 | 2.14 m | 22.27 t | OAc | 2.07 s | 20.92 q |
| 6 | 5.44 t (6.9) | 128.84 d | 171.16 s |
Measured in CDCl3 at 500 MHz for 1H and 125 MHz for 13C with reference to the solvent signals, δ in ppm and J in Hz.
