Abstract
The1H NMR spectra of protonated 1,8-bis(dimethylamino)naphthalene cations (“proton sponges”) containing substituents of various types in positions 2(7) and 4(5) were measured. To estimate the degree of asymmetry of the intramolecular hydrogen bridge in the cations studied, the spin-spin coupling constants of the NH proton with protons of nonequivalent Me2N groups were suggested to be used. Bromination of the “proton sponge” into positions 2 and 7 byN-bromosuccinimide was carried out for the first time.
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For Part 22, see Ref. 1.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 68–75, January, 1998.
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Pozharskii, A.F., Ozeryanskii, V.A. peri-Naphthylenediamines. Russ Chem Bull 47, 66–73 (1998). https://doi.org/10.1007/BF02495511
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DOI: https://doi.org/10.1007/BF02495511