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The introduction of two new imidazole-based bis-dicationic Brönsted acidic ionic liquids and comparison of their catalytic activity in the synthesis of barbituric acid derivatives

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Abstract

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.

Graphical abstract: The introduction of two new imidazole-based bis-dicationic Brönsted acidic ionic liquids and comparison of their catalytic activity in the synthesis of barbituric acid derivatives

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Publication details

The article was received on 10 Mar 2018, accepted on 07 May 2018 and first published on 17 May 2018


Article type: Paper
DOI: 10.1039/C8NJ01179F
Citation: New J. Chem., 2018, Advance Article
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    The introduction of two new imidazole-based bis-dicationic Brönsted acidic ionic liquids and comparison of their catalytic activity in the synthesis of barbituric acid derivatives

    N. Daneshvar, M. Nasiri, M. Shirzad, M. Safarpoor Nikoo Langarudi, F. Shirini and H. Tajik, New J. Chem., 2018, Advance Article , DOI: 10.1039/C8NJ01179F

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