Table 3.
1H-NMR spectral data for 1–5.
| Stabilizer | 1H-NMR (400 MHz: DMSO-d6, ppm) |
|---|---|
| 1 | 11.22 (br. s, exch., 3 H, OH), 8.49 (s, 3 H, CH=N), 7.61 (d, J = 8.2 Hz, 3 H, Ar), 7.01 (t, J = 8.2 Hz, 3 H, Ar), 6.58 (d, J = 8.2 Hz, 3 H, Ar), 5.99 (s, 3 H, Ar) |
| 2 | 11.15 (br. s, exch., 3 H, OH), 9.29 (s, 3 H, CH=N), 7.45–7.33 (m, 9 H, Ar), 7.15 (d, J = 8.4 Hz, 3 H, Ar) |
| 3 | 10.36 (br. s, exch., 3 H, OH), 9.26 (s, 3 H, CH=N), 7.75 (d, J = 8.2 Hz, 6 H, Ar), 6.90 (d, J = 8.2 Hz, 6 H, Ar) |
| 4 | 9.28 (s, 3 H, CH=N), 8.44–8.14 (m, 12 H, Ar) |
| 5 | 9.28 (s, 3 H, CH=N), 7.95–7.55 (m, 9 H, Ar), 7.49–7.42 (m, 9 H, CH and Ar), 6.68 (d, J = 8.0 Hz, 3 H, CH) |