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Facile and efficient synthesis of pyrimido[1,2-a]benzimidazole and tetrahydrobenzimidazo[2,1-b]quinazolin-1(2H)-one derivatives using Brönsted acidic ionic liquid supported on rice husk ash (RHA-[pmim]HSO4)

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Abstract

In this work, a green and efficient procedure has been reported for the synthesis of pyrimido[1,2-a]benzimidazole and tetrahydrobenzimidazo[2,1-b]quinazolin-1(2H)-one derivatives using Brönsted acidic ionic liquid supported on rice husk ash (RHA-[pmim]HSO4) as the catalyst. These reactions were performed at 100 °C under solvent-free conditions with high yields in very short reaction times.

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Acknowledgments

We are thankful to the University of Guilan Research Council for the partial support of this work.

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Authors and Affiliations

  1. Department of Chemistry, College of Science, University of Guilan, Rasht, 41335, Iran

    Farhad Shirini, Mohadeseh Seddighi & Omid Goli-Jolodar

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  1. Farhad Shirini
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  2. Mohadeseh Seddighi
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  3. Omid Goli-Jolodar
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Correspondence to Farhad Shirini.

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Shirini, F., Seddighi, M. & Goli-Jolodar, O. Facile and efficient synthesis of pyrimido[1,2-a]benzimidazole and tetrahydrobenzimidazo[2,1-b]quinazolin-1(2H)-one derivatives using Brönsted acidic ionic liquid supported on rice husk ash (RHA-[pmim]HSO4). J IRAN CHEM SOC 13, 2013–2018 (2016). https://doi.org/10.1007/s13738-016-0918-7

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