Zakeri, M. and Nasef, M. M. and Kargaran, T. and Ahmad, A. and Abouzari-Lotf, E. and Asadi, J. (2017) Synthesis of pyrano[2,3-c] pyrazoles by ionic liquids under green and eco-safe conditions. Research on Chemical Intermediates, 43 (2). pp. 717-728. ISSN 0922-6168
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Official URL: http://dx.doi.org/10.1007%2Fs11164-016-2648-y
Abstract
Optimization of a green approach to the synthesis of pyrano[2,3-c]pyrazoles based on the one-pot, four-component condensation via a domino Knoevenagel/Michael/cyclization sequence was investigated. This method involved the evaluation of the activity of several ionic liquids (ILs) in various solvents. This one-pot, four-component reaction revealed simplicity, higher yield and lower toxicity advantages over a corresponding three-component method. The effect of reaction parameters including the type and amount of catalyst, type of solvent, reaction temperature and time were studied with respect to yield of pyrano[2,3-c]pyrazoles. Catalyst recyclability and time-saving aspects of the reaction suggest that this method presents real alternatives over conventional reaction protocols.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | green chemistry, ionic liquids, catalysts |
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Malaysia-Japan International Institute of Technology |
| ID Code: | 80528 |
| Deposited By: | Narimah Nawil |
| Deposited On: | 22 May 2019 06:50 |
| Last Modified: | 22 May 2019 06:50 |
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