Álvarez-Builla, Julio, Novella, José Luis, Gálvez-Ruano, Enrique, Smith-Verdier, P., Florencio, Feliciana, García-Blanco, S., Bellanato, Juana, Santos, M., and Universidad de Alcalá. Departamento de Química Orgánica
Kröhnke condensation of several cycloimmonium salts with p-dimethylaminobenzaldhyde 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.