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Design, characterization and application of new ionic liquid 1-sulfopyridinium chloride as an efficient catalyst for tandem Knoevenagel–Michael reaction of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one with aldehydes

Paper ID Volume ID Publish Year Pages File Format Full-Text
40036 45843 2013 8 PDF Available
Title
Design, characterization and application of new ionic liquid 1-sulfopyridinium chloride as an efficient catalyst for tandem Knoevenagel–Michael reaction of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one with aldehydes
Abstract

•Catalytic system based on 1-sulfopyridinium chloride was synthesized.•This catalyst was characterized by IR, 1H as well as 13C NMR, UV and mass spectra.•This catalytic system was successfully tested in Knoevenagel–Michael reaction.•The yield of products was obtained 72–93% for 8–16 min under mild conditions.

In this work, novel ionic liquid 1-sulfopyridinium chloride {[Pyridine–SO3H]Cl} is synthesized, and characterized by IR, 1H and 13C NMR, UV as well as mass spectra. The ionic liquid is used as an efficient, homogeneous and reusable catalyst for the synthesis of 4,4′-(arylmethylene)-bis(3-methyl-1-phenyl-1H-pyrazol-5-ol)s by tandem Knoevenagel–Michael reaction of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one with various aromatic and hetero-aromatic aldehydes under mild reaction conditions.

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Keywords
1-Sulfopyridinium chloride {[Pyridine–SO3H]Cl}; 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one; Aldehyde; 4,4′-(Arylmethylene)-bis(3-methyl-1-phenyl-1H-pyrazol-5-ol); Ionic liquid
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Design, characterization and application of new ionic liquid 1-sulfopyridinium chloride as an efficient catalyst for tandem Knoevenagel–Michael reaction of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one with aldehydes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 467, 2 October 2013, Pages 61–68
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us