Table 2.
1H-NMR data of polyyne 1-5 from A. sinensis [CDCl3, 400 MHz, δH (J Hz)]
| Position in compounds 1,3-5 [2] | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| 1 [18] | Ha: 5.466 ddd (17.1, 1.2, 1.0); Hb: 5.254 dt (10.2, 1.2) | Ha: 5.263, dt (1.2, 10.0); Hb: 5.498, dt (1.2, 17.0) | 1.017, t (7.4) | Ha: 5.468, d (17.0); Hb: 5.286, d (10.2) | 3.719, t (6.0) |
| 2 [17] | 5.943, ddd (17.1, 10.2, 5.3) | 5.951, ddd (17.0, 10.2, 5.3) | 1.749, m | 5.954, ddd (17.0, 10.2, 5.2) | 2.821, t (6.0) |
| 3 [16] | 4.936, ddd (5.3, 1.0, 1.0) | 4.952, br d (5.3) | 4.385, t (6.4) | 4.960, d (5.2) | |
| 8 [11] | 5.213, dt (8.3, 1.0) | 5.212, d (8.1) | 5.204, d (8.2) | 4.296, d (7.4) | 5.265, dd (8.4, 1.0) |
| 9 [10] | 5.521, dd (10.7, 8.3) | 5.526, ddt (10.6, 8.1, 1.0) | 5.517, ddt (10.6, 8.2, 1.3) | 3.190, dd (7.4, 4.4) | 5.525, ddt (10.6, 8.4, 1.4) |
| 10 [9] | 5.606, dt (10.7, 7.4) | 5.768, ddt (10.6, 7.4, 1.0) | 5.613, ddt (10.6, 7.4, 0.9) | 3.067, dt (5.5, 4.4) | 5.670, ddt (10.6, 1.0, 7.6) |
| 11 [8] | 2.105, ddt (8.4, 7.4, 1.2) | 2.108, dt (1.3, 7.4) | 2.113, ddt (7.4, 7.4, 1.3) | 1.560, m | 2.212, dtd (7.6, 7.6, 1.4) |
| 12 [7] | 1.390, m | 1.391, m | 1.389, m | 1.215-1.405, m | 1.329, m |
| 13-16 [3-6] | 1.240-1.330, m | 1.259-1.310,m | 1.279-1.293, m | 1.215-1.405, m | 1.252-1.333, m |
| 17 [2] | 0.882, t (7.0) | 1.630, m | 0.885, t (7.0) | 0.890, t (7.0) | 0.884, t (7.5) |
| [1] | 4.062, t (6.8) | ||||
| [2′] | 2.051, s | ||||
| 1-OCH3 | 3.348, s |