Isomerism of 9-arylaminomethylene-6,7,8,9-tetrahydro-4-oxo-4H-pyrido-[1,2-a]pyrimidines

Gábor Tóth, Áron Szöllõsy, Benjamin Podányi, István Hermecz, Ágnes Horváth, Zoltán Mèszáros, István Bitter

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Several 9-arylaminomethylene-6,7,8,9-tetrahydro-4-oxo-4H-pyrido[1,2-a]pyrimidines have been synthesized and studied by1H and13C n.m.r. spectroscopy. The dominant tautomeric form has been established. Fast Z-E isomerisation has been found around the enamino C=C double bond. The effect of the solvent, temperature, and various structural modifications on the equilibrium Z.E isomeric ratios has been measured.

Original languageEnglish
Pages (from-to)165-169
Number of pages5
JournalJournal of the Chemical Society, Perkin Transactions 2
Publication statusPublished - Jan 1 1983


ASJC Scopus subject areas

  • Chemistry(all)

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