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One‐ and two‐dimensional nuclear overhauser effect. Investigation of the stereochemistry of 5‐functionalized 2‐imidazolines

The study of 5‐functionalized 2‐imidazolines by 1H NMR, 1‐D NOE and 2‐D NOE is reported. The application of these methods confirms the relative configurations and conformations of the compounds. In particular, NOE effects and related crystallographic data are in good agreement with the proposed angular geometry of the N‐1 and the ring. Some examples of spectra obtained with the different techniques are presented and discussed.