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Note | Regular issue | Vol 51, No. 10, 1999, pp.2431-2438
Published online, 1st January, 1970
DOI: 10.3987/COM-99-8624
Substituent Effects in the Ring-Chain Tautomerism of 1,2-Diarylimidazolidines

Anikó Göblyös, László Lázár, Ferenc Evanics, and Ferenc Fülöp*

*Institute of Pharmaceutical Chemistry, Abert Szent-Györgyi Medical University, POB 121, H-6701 Szeged, Eötvös u. 6, Hungary

Abstract

1,2-Diaryl-substituted imidazolidines proved to be ring-chain tautomeric mixtures in CDCl3 at 300 K. Both 1- and 2-aryl groups exerted significant electronic effect on the tautomeric equilibria, which could be described by the equation log KX = ρσ+ + log KX=H.