Table 2.
1H-NMR data of 2 and 3 at 400 MHz in CDCl3, δ in ppm, and J in Hz.
| 2 | 3 | |
|---|---|---|
| H-C(1) | 7.63 (d, J = 10.2 Hz) | 7.67 (d, 1H, J = 10.2 Hz) |
| H-C(2) | 6.19 (dd, J = 10.2 and 1.8 Hz) | 6.18 (dd, J = 10.3 and 1.9 Hz) |
| H-C(3) | -- | -- |
| H-C(4) | 6.07 (t, J = 1.8 Hz) | 6.06 (t, J = 1.26 Hz) |
| H-C(5) | -- | -- |
| H-C(6) | 2.01 (m) | 1.92 (m) |
| H-C(7) | 1.73 (m) | 1.81 (m) |
| H-C(8) | 1.98 (m) | 1.93 (m) |
| H-C(9) | 1.99 (d, J = 3.1 Hz) | 2.45 (m) |
| H-C(10) | -- | -- |
| H-C(11) | -- | -- |
| H-C(12) | 2.38 (m) | 2.52 (m) |
| H-C(13) | -- | -- |
| H-C(14) | 2.06 (m) | 1.90 (m) |
| H-C(15) | 1.94 (m) | 1.82 (m) |
| H-C(16) | 1.92 (m) | 2.01 (m) |
| H-C(17) | 1.69 (m) | 1.60 (m) |
| H-C(18) | 0.67 (s) | 0.81 (s) |
| H-C(19) | 1.42 (s) | 1.43 (s) |
| H-C(20) | -- | 3.76 (br s) (4.61, m in C5D5N) |
| H-C(21) | 4.24 (d, J = 20 Hz) | 3.76 (br s) (4.52, m in C5D5N) |