TABLE 4.
NMR chemical shifts observed for purified desferri form of fraction 3 at 293 K confirm its identity as triacetylfusarinine C
| Structural group | Signal for:
|
|||
|---|---|---|---|---|
|
1H NMR in DMSO-d6
|
13C NMR in CDCl3
|
|||
| Publisheda | Fraction 3 | Publisheda | Fraction 3 | |
| αCH | 4.18 (m) | 4.06-4.23 (m) | 52.5 | 52.6 |
| βCH2 | 1.62 (m) | 1.44-1.73 (m) | 29.3 | 28.9 |
| γCH2 | 1.62 (m) | 1.44-1.73 (m) | 23.3 | 23.1 |
| δCH2 | 3.48 (m) | 3.50 (m) | 48.1 | 47.1 |
| —COO— | 170.9 | 171.2 | ||
| Nδ-Acyl-CH= | 6.22 (s) | 6.31 (s) | 118.4 | 119.0 |
| Nδ-Acyl-CH2— | 2.64 (t) | 2.66 (m) | 32.4 | 31.7 |
| Nδ-Acyl-CH2O— | 4.18 (m) | 4.06-4.23 (m) | 62.9 | 62.7 |
| Nδ-Acyl-CH3 | 1.87 (s) | 1.86 (s) | 24.4 | 24.4 |
| Nδ-Acyl=C< | 149.1 | 149.0 | ||
| Nα-Acetyl-CH3 | 1.84 (s) | 1.83 (s) | 22.9 | 22.8 |
| Nα-Acetyl>C=O | 172.0 | 171.2b | ||
| Hydroxamic>C=O | 172.0 | 172.1b | ||
| Nδ-OH | 9.74 | |||
| NαH | 8.21 | |||
a
values are from reference 24.
b
Assignments may be reversed.