Reactions of 2-amino- and 2-hydrazinobenzimidazoles with 2-acyldimedones

Autor: Strakov, A. Ya., Petrova, M. V., Popelis, Ju., Krasnova, A. A., Strakova, N. A.
Zdroj: Chemistry of Heterocyclic Compounds; February 1996, Vol. 32 Issue: 2 p221-226, 6p
Abstrakt: The reaction of 2 formyldimedone with 2-amino- and 2-hydrazinobenzimidazoles at 20°C in ethanol gave 2-(2-benzimidazolyl)aminomethylene- and 2-[2-(2-benzimidazolyl)hydrazinomethylene]-5,5-dimethylcylohex-anediones, while this reaction carried out in ethanol at reflux in the presence of acid gave 2,2-dimethyl-4-oxo 1, 2, 3, 4-tetrahydroquinazolino(1, 2-a]benzimidazole and 1-(2-benzimidazolyl)-6, 6-dimethyl-4-oxo-4, S, 6, 7-tetrahydroindazole, respectively.
Databáze: Supplemental Index
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