Table 1. Chemical shifts (δ, ppm) for selected characteristic resonances in the 1H NMR spectra of conjugates 1 – 4, 6 and 7.
|
Conjugate |
H-4 |
H-18 |
H-19 |
H-5’ |
H-10’ |
H-20’ |
NHa” |
NHw2” |
|
1 |
5.56, s |
0.25, s |
0.75, s |
9.26, s |
9.04, s |
8.52, s |
6.61, br.t |
6.30, br.t |
|
2 |
5.53, s |
0.73, s |
1.00, s |
9.31, s |
9.28, s |
8.51, s |
6.35, br.t |
5.30, br.t |
|
3 |
5.53, s |
0.54, s |
0.88, s |
9.24, s |
9.10, s |
8.48, s |
6.78, br.t |
6.24, br.t |
|
4 |
5.54, s |
0.25, s |
0.81, s |
9.32, s |
9.24, s |
8.50, s |
6.22, br.t |
5.53 br.t |
|
6 |
5.48, s |
0.71, s |
0.95, s |
9.23, s |
9.19, s |
8.46, s |
6.40, br.d |
6.75, br.t |
|
7 |
5.49, s |
0.70, s |
0.91, s |
9.25, s |
9.22, s |
8.47, s |
7.15, br.d |
6.56, br.t |