Chemistry of Heterocyclic Compounds p. 205 - 209 (1985)
Update date:2022-08-03
Topics:
Grigor'ev, I. A.
Martin, V. V.
Shchukin, G. I.
Mamatyuk, V. I.
Volodarskii, L. B.
The introduction of an N-oxide oxygen atom into azomethines leads to an upfield shift of the signals for the carbon atom of the C=N group in the 13C NMR spectra by 30-33 ppm.This is consistent with the increase in the electron density on this atom.The signal of the nitrone carbon atom is observed in the region of 140-147 ppm, depending on the nature of the substituent at the C(2) atom of the 3-imidazoline 3-oxide ring.
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