Abstract
N.N′-disubstituted amidines react with monosubstituted 2.4.6-trichlorophenyl malonates (2 a-d) yielding mesoionic compounds with a six-membered ring. The 2-aminopyridines1 a-c react in the same way to give the bicyclic mesomeric betaines3 b-g. 3 a is obtained by the action of carbon suboxide (C3O2) on1 a.
Zusammenfassung
N.N′-disubstit. Amidine reagieren mit monosubstit. Malonsäure-bis-2.4.6-trichlorophenylestern (2 a-d) zu mesoionischen 6-Ringverbindungen (4 a-f). In analoger Weise geben die 2-Aminopyridine1 a-c die bicyclischen mesomeren Betaine3 b-g. Mit Hilfe von Kohlensuboxid läßt sich3 a darstellen.
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Mesoionische Malonylheterocyclen I.
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Kappe, T., Lube, W. Zur Synthese mesomerer Pyrimidinbetaine. Monatshefte für Chemie 102, 781–787 (1971). https://doi.org/10.1007/BF01167260
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DOI: https://doi.org/10.1007/BF01167260