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Efficient synthesis of 2-(pyrazol-3-yl)benzimidazoles from 3-arylacylidene-3,4-dihydroquinoxalin-2(1H)-ones and hydrazine hydrate via a novel rearrangement |
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| Authors: | Vakhid A Mamedov Anna M Murtazina Aidar T Gubaidullin Elena A Hafizova Il’dar Kh Rizvanov |
| Institution: | A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Research Center of the Russian Academy of Sciences, Arbuzov str. 8, 420088 Kazan, Russian Federation |
| Abstract: | A highly efficient method for the synthesis of 2-(pyrazol-3-yl)benzimidazoles has been developed on the basis of the novel ring contraction of 3-arylacylidene-3,4-dihydroquinoxalin-2(1H)-ones with hydrazine hydrate. |
| Keywords: | Dihydroquinoxalin-2(1H)-one Benzimidazole Hydrazine hydrate Ring contraction Novel rearrangement Pyrazolylbenzimidazoles |
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