Table 3.
1H NMR Dataa δ (J, Hz) for 13–18
| H | 13 | 14 | 15 | 16 | 17 | 18 |
|---|---|---|---|---|---|---|
| 1 | 9.37, s | 9.38, s | 9.37, s | 9.35, s | 9.38, s | 9.38, s |
| 3 | 6.90, dd (3.8, 2.8) | 6.89, br s | 6.90, dd (3.2, 2.8) | 6.90, dd (3.6, 2.8) | 6.88, dd (3.6, 2.8) | 6.89, dd (3.2, 2.8) |
| 4 | 6.08, dd (3.8, 2.8) | 6.08, br s | 6.08, dd (3.2, 2.8) | 6.09, dd (3.6, 2.8) | 6.08, dd (3.6, 2.8) | 6.08, dd (3.2, 2.8) |
| 6 | 2.66, t (7.6) | 2.66, t (7.6) | 2.66, t (7.6) | 2.66, t (7.6) | 2.71, t (7.6) | 2.66, t (7.6) |
| 7 | 1.66, m | 1.66, m | 1.66, m | 1.67, m | 2.41, t (7.2) | |
| 8 | 1.26, br s | 1.27, br s | 1.27, br s | 1.29, br s | 5.39, m | 1.27, br s |
| 9 | 1.26, br s | 1.27, br s | 1.27, br s | 1.29, br s | 5.46, m | 1.27, br s |
| 10 | 1.26, br s | 1.27, br s | 1.27, br s | 1.29, br s | 2.01, m | 1.27, br s |
| 11 | 1.26, br s | 1.27, br s | 1.27, br s | 1.29, br s | 1.26, br s | 2.03, m |
| 12 | 1.26, br s | 1.27, br s | 1.27, br s | 1.29, br s | 1.26, br s | 5.37, m |
| 13 | 1.26, br s | 1.27, br s | 1.27, br s | 1.29, br s | 1.26, br s | 5.37, m |
| 14 | 1.26, br s | 1.27, br s | 1.27, br s | 2.03, m | 1.26, br s | 2.03, m |
| 15 | 1.26, br s | 1.27, br s | 1.27, br s | 5.37, m | 1.26, br s | 1.27, br s |
| 16 | 1.26, br s | 1.27, br s | 1.27, br s | 5.37, m | 1.26, br s | 1.27, br s |
| 17 | 1.26, br s | 1.27, br s | 1.27, br s | 2.03, m | 1.26, br s | 1.27, br s |
| 18 | 1.45, m | 1.27, br s | 1.27, br s | 1.29, br s | 1.26, br s | 1.27, br s |
| 19 | 1.66, m | 1.27, br s | 0.89, t (6.4) | 1.29, br s | 1.67, m | 1.67, m |
| 20 | 2.34, t (7.2) | 1.27, br s | 1.29, br s | 0.86, d (7.6) | 0.87, d (7.6) | |
| 21 | 1.45, m | 1.29, br s | 0.86, d (7.6) | 0.87, d (7.6) | ||
| 22 | 1.66, m | 0.89, t (7.2) | ||||
| 23 | 2.34, t (7.2) | |||||
| NH | 9.48, br s | 9.49, br s | 9.44, br s | 9.25, br s | 9.17, br s | 9.16, br s |
a
Bruker AMX 400 MHz spectrometer; Chemical shifts (ppm) referenced to CDCl3 (δH 7.27); Numerical order groups compounds of similar chain length.