Chemistry of Heterocyclic Compounds p. 1110 - 1115 (1991)
Update date:2022-09-26
Topics:
Palomino, M. I. Leon
Zaitsev, B. E.
Gashev, S. B.
Nikitin, S. V.
Smirnov, L. D.
Koval'chukova, O. V.
Pyrido<1,2-a>pyrimidinium salt derivatives have been prepared by condensation of 2-aminopyridinium salts with β-dicarbonyl compounds.The acid-base equilibrium dissociation constants for 2,4-dimethyl-9-hydroxypyrido<1,2-a>pyrimidinium perchlorate have been measured, and the spectroscopic characteristics of its neutral, anionic, and cationic forms have been determined; the electronic absorption spectra of the neutral and anionic forms of 2,4-dimethyl-9-hydroxypyrido<1,2-a>pyrimidinium perchlorate have been interpreted based on this experimental and calculated data.
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