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Polycyclic Aromatic Compounds Volume 41, 2021 - Issue 9
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Research Articles

[H-Pyrr][HSO4] as an Efficient Ionic Liquid Catalyst for the Synthesis of Xanthenes, Tetraketones, and Triazolo[2,1-b]quinazolinones

Mehdi ZabihzadehDepartment of Chemistry, College of Science, University of Guilan, Rasht, IranORCID Iconhttps://orcid.org/0000-0003-3362-4525
ORCID Icon,
Farhad ShiriniDepartment of Chemistry, College of Science, University of Guilan, Rasht, IranCorrespondence[email protected]
ORCID Iconhttps://orcid.org/0000-0002-7204-5000
ORCID Icon,
Hassan TajikDepartment of Chemistry, College of Science, University of Guilan, Rasht, Iran
&
Nader DaneshvarDepartment of Chemistry, College of Science, University of Guilan, Rasht, IranORCID Iconhttps://orcid.org/0000-0001-9016-1956
ORCID Icon
Pages 1972-1987 | Received 14 Sep 2019, Accepted 19 Dec 2019, Published online: 03 Jan 2020
 
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Abstract

Pyrrolidin-1-ium hydrogen sulfate ([H-Pyrr][HSO4]) was prepared by a simple and atom-economic neutralization reaction of sulfuric acid and pyrrolidine. This reagent can be used as an easily available, cheap, recyclable, and environmentally benign catalyst for the promotion of the synthesis of 1,8-dioxo-octahydro-xanthenes, tetraketones, and triazolo[2,1-b]quinazolinone derivatives. Easy preparation of the catalyst, simple work-up procedure, green process, high yields, and short reaction times are the most important advantages of this method.

Acknowledgments

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

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