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Synthesis 1987; 1987(4): 357-362
DOI: 10.1055/s-1987-27942
DOI: 10.1055/s-1987-27942
paper
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Synthesis of 2-(Benzoylmethylene)imidazolidines and -hexahydropyrimidines by Condensation of Ethyl Benzoylacetimidates With 1,2-Ethanediamine or 1,3-Propandiamine, and Some Addition Reactions
Further Information
Publication History
Publication Date:
20 August 2002 (online)
Ethyl benzoylacetimidates react with 1,2-ethanediamine or 1,3-propanediamine in absolute ethanol to afford the 2-(benzoylmethylene)-imidazolidines or -hexahydropyrimidines, respectively. The structure of these products as ketene aminals is confirmed by spectral data. Electrophilic additions of hydrochloric acid and diethyl diazenedicarboxylate to the ketene aminals are also described.