TABLE 1.
13C and 1H NMR spectral data of compounds 1 and 2 (100, 400 MHz, DMSO‐d6, and TMS).
| Position no. | Compound 1 | Compound 2 | ||
|---|---|---|---|---|
| δc | δH (J in Hz) | δc | δH (J in Hz) | |
| 1 | 162.77 | — | 165.68 | — |
| 2 | 55.80 | Overlapping (1H) | 121.19 | 5.94 (1H, d) |
| 3 | 122.29 | 4.14 (1H, dt) | 141.02 | 7.19 (1H, dd) |
| 4 | 130.44 | 6.05 (1H, ddd) | 129.48 | 6.14 (1H, m) |
| 5 | 55.93 | Overlapping (1H) | 142.63 | 6.14 (1H, m) |
| 6 | 131.38 | — | 35 | 2.42 (2H, q) |
| 7 | 111.69 | 6.28 (1H, br,s) | 35 | 2.64 (2H, t) |
| 8 | 147.92 | — | — | — |
| 9 | 149.10 | — | — | — |
| 10 | 107.95 | 6.56 (1H, d) | — | — |
| 11 | 120.65 | Overlapping (1H) | — | — |
| 1′ | 46.93 | 3.85 (2H, m) | 45.85 | 3.57 (2H, t) |
| 2′ | 28.95 | 1.32–1.79 (2H, m) | 29.71 | 1.4–1.8 (1H, m) |
| 3′ | 28.65 | Overlapping (2H) | 24.65 | 0.92 (3H) |
| 4′ | 28.73 | Overlapping (2H) | 24.65 | 0.92 (3H) |
| 5′ | 41.25 | 3.85 (2H, m) | — | — |
| 6′ | — | — | — | — |
| 1″ | 178.53 | — | 135.17 | — |
| 2″ | 38.3 | 3.15 (1H, t) | 108.84 | 6.64 (1H, br,s) |
| 3″ | 34.79 | 2.94 (1H, dd) | 147.59 | — |
| 4″ | 54.68 | — | 145.74 | — |
| 5″ | 109.49 | 6.24 (1H, br,s) | 108.17 | 6.72 (1H, d) |
| 6″ | 146.49 | — | 119.03 | 6.60 (1H, d) |
| 7″ | 143.15 | — | — | — |
| 8″ | 105.40 | 6.46 (1H, d) | — | — |
| 9″ | 120.21 | 6.07 (1H, br,s) | — | — |
| 1′′′ | 46.48 | 2.57 (2H, m) | — | — |
| 2′′′ | 29.34 | Overlapping (1H) | — | — |
| 3′′′ | 20.13 | 0.92 (3H, d) | — | — |
| 4′′′ | 19.89 | 0.92 (3H, d) | — | — |
| Methylene di‐oxy |
100.92 101.06 |
5.93 (2H, d) 5.82 (2H, d) |
100.8 | 5.90 (2H, s) |