Tetrahedron p. 699 - 708 (1986)
Update date:2022-08-03
Topics:
Alvarez-Builla, J.
Novella, J. L.
Galvez, E.
Smith, P.
Florencio, F.
et al.
Kroehnke condensation of several cycloimmonium salts with p-dimethylaminobenzaldehyde has been studied.X-Ray diffraction, IR and Raman spectra, 1H- and 13C-NMR and UV spectra of the products are discussed, being compared, when necessary, with the starting pyridinium salts.All compounds showed the Z configuration, corresponding to the more stable structure, except one, in which steric factors were predominant.
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