Research Article
2-Pyrrolidinones and 3-Pyrrolin-2-ones: A Study on the Chemical Reactivity of These Structural Moieties
Table 2
1H NMR data of the isomers 4a and 4b.
| Hydrogens | 4a | 4b | (Multiplicity, J/Hz) | (Multiplicity, J/Hz) |
| N-H | 6.55 (bs) | 6.90 (bs) |
| C3-H | 4.46 (dd, 2.4 and 7.3) | 4.32 (dd, 4.9 and 7.5) |
| C4-H | 2.76–2.50 (m) | 2.78–2.50 (m) | 2.42–2.24 (m) | 2.42–2.24 (m) |
| C5-H | 3.50–3.24 (m) | 3.65–3.48 (m) | 3.48–3.25 (m) |
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