A facile synthesis of pyrrolo[1,2-a]benzimidazoles and pyrazolo[3,4:4′,3′]pyrrolo[1,2-a]benzimidazole derivatives |
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| Authors: | Nehal M Elwan |
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| Institution: | Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt |
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| Abstract: | Reaction of 2-cyanomethylbenzimidazole 1 with hydrazonoyl halides 2 led to formation of pyrrolo1,2-a]benzimidazole derivatives 7. Similar reaction of 1 with halides 3 afforded 5-amino-4-(benzimidazol-2-yl)pyrazole derivatives 11 or 1-amino-2-arylpyrazolo3,4:4′,3′]pyrrolo1,2-a]benzimidazol-4-one 14 depending on the reaction conditions. The mechanisms of the studied reactions are discussed. |
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| Keywords: | 2-Cyanomethylbenzimidazole Hydrazonoyl halides Pyrrolo[1 2-a]benzimidazole 5-Amino-4-(benzimidazol-2-yl)pyrazole 1-Amino-2-arylpyrazolo[3 4:4&prime 3&prime ]pyrrolo[1 2-a]benzimidazol-4-one |
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