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Issue 83, 2015
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Design, preparation and characterization of a new ionic liquid, 1,3-disulfonic acid benzimidazolium chloride, as an efficient and recyclable catalyst for the synthesis of tetrahydropyridine under solvent-free conditions

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Abstract

In the present work, 1,3-disulfonic acid benzimidazolium chloride as a new ionic liquid, is synthesized, and characterized by studying its FT-IR, 1H NMR, 13C NMR as well as mass spectra. This ionic liquid is used as an efficient, homogeneous and recyclable catalyst for synthesis of highly functionalized tetrahydropyridine via one-pot multi-component condensation of aromatic aldehydes, ethyl acetoacetate, and anilines under solvent-free conditions. The present synthetic route is a green protocol offering several advantages, such as high yield of products, shorter reaction time, mild reaction conditions, minimizing chemical waste and easy work-up procedures. Further, the catalyst could be reused and recovered at least four times without appreciable loss of activity.

Graphical abstract: Design, preparation and characterization of a new ionic liquid, 1,3-disulfonic acid benzimidazolium chloride, as an efficient and recyclable catalyst for the synthesis of tetrahydropyridine under solvent-free conditions

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Article information


Submitted
05 Jun 2015
Accepted
29 Jul 2015
First published
29 Jul 2015

RSC Adv., 2015,5, 67405-67411
Article type
Paper

Design, preparation and characterization of a new ionic liquid, 1,3-disulfonic acid benzimidazolium chloride, as an efficient and recyclable catalyst for the synthesis of tetrahydropyridine under solvent-free conditions

M. Abbasi, RSC Adv., 2015, 5, 67405
DOI: 10.1039/C5RA10699K

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