| Autor: |
Daneshvar, Nader, Nasiri, Mitra, Shirzad, Maryam, Safarpoor Nikoo Langarudi, Mohaddeseh, Shirini, Farhad, Tajik, Hassan |
| Předmět: |
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| Zdroj: |
New Journal of Chemistry; 6/21/2018, Vol. 42 Issue 12, p9744-9756, 13p |
| Abstrakt: |
In this article, the preparation of bis-imidazolium hydrogen sulfate and bis-imidazolium perchlorate as two new bis-dicationic Brönsted acidic ionic liquids based on imidazole is reported. After characterization by FT-IR, mass and NMR spectroscopy and pH titration, the applicability of these reagents is studied in the promotion of the synthesis of 5-arylidene barbituric acids and pyrano[2,3-d] pyrimidinone derivatives. These methods possess some advantages such as ease of preparation of the catalyst, simple work-up procedure, short reaction times, excellent yields, and use of nonorganic solvents during all steps of the reactions and good reusability of the catalysts. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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