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13C NMR spectra of cyclic nitrones. 2. 1- and 4-substituted 2,2,5,5-tetramethyl-3-imidazoline 3-oxides

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Chemistry of Heterocyclic Compounds Aims and scope

Abstract

The chemical shift of the carbon atom of the nitrone group in the 13C NMR spectra of 3-imidazoline 3-oxides lies in the region of 117–152 ppm and depends on the electronic effect of the substituants at positions 1, 4, and 5 of the heterocycle. Increase in the electron-withdrawing character of the substituent at these positions leads to an upfield shift of the signal for the nitrone carbon atom, and this corresponds to the increase in electron density on it.

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Authors and Affiliations

  1. Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR, 630090, Novosibirsk

    I. A. Grigor'ev, G. I. Shchukin, V. V. Martin & V. I. Mamatyuk

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  1. I. A. Grigor'ev
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  2. G. I. Shchukin
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  3. V. V. Martin
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  4. V. I. Mamatyuk
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Additional information

Communication 1 see [1].

Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, dp. 252–259, February, 1985.

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Grigor'ev, I.A., Shchukin, G.I., Martin, V.V. et al. 13C NMR spectra of cyclic nitrones. 2. 1- and 4-substituted 2,2,5,5-tetramethyl-3-imidazoline 3-oxides. Chem Heterocycl Compd 21, 210–217 (1985). https://doi.org/10.1007/BF00504212

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  • DOI: https://doi.org/10.1007/BF00504212

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