An efficient one‐pot synthesis of bis‐indolylmethanes containing pyrazolyl catalyzed by Brønsted acidic ionic liquid under solvent‐free conditions |
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| Authors: | Chenjiang Liu Chuanji Yu |
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| Affiliation: | Key Laboratory of Oil and Gas Fine Chemicals, School of Chemistry and Chemical Engineering, Xinjiang University, Ministry of Education, Urumqi 830046, People's Republic of China |
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| Abstract: | Brønsted acidic ionic liquid [PyNCH2CO2H][HSO4] was found to be an effective catalyst for the condensation reactions of indoles with various 4‐formylpyrazoles to afford the corresponding bis‐indolylmethanes containing pyrazole under solvent‐free conditions. The satisfactory results were obtained with excellent yields, short reaction time, and simplicity in the experimental procedure. J. Heterocyclic Chem., (2011). |
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