Reactions of 2-amino- and 2-hydrazinobenzimidazoles with 2-acyldimedones |
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Authors: | A. Ya. Strakov M. V. Petrova Ju. Popelis A. A. Krasnova N. A. Strakova |
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Affiliation: | (1) Riga Technical University, LV-1658 Riga, Latvia;(2) Latvian Institute of Organic Chemistry, LV-1006 Riga, Latvia |
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Abstract: | 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.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 247–252, February, 1996. |
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