Crown ether complex cation ionic liquids: synthesis and catalytic applications for the synthesis of tetrahydro-4H-chromene and 1,4-dihydropyridine derivatives

A series of crown ether complex cation ionic liquids (CECILs) are synthesized by crown ethers chelated with sodium benzenesulfonates, and used as a green and environmental catalyst, for the synthesis of tetrahydro-4H-chromene and 1,4-dihydropyridine derivatives by three-component reactions of aromat...

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Bibliographic Details
Published in:Journal of sulfur chemistry 2017-07, Vol.38 (4), p.440-449
Main Authors: Abaszadeh, Mehdi, Seifi, Mohammad
Format: Article
Language:English
Subjects:
1,4-dihydropyridine
Aldehydes
Catalysts
Cations
Chemical synthesis
Crown ether complex cation ionic liquids
Crown ethers
Derivatives
Ethers
Ionic liquids
Ions
Malononitrile
Sodium
sodium benzenesulfonates
Solvents
tetrahydro-4H-chromene
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Summary:A series of crown ether complex cation ionic liquids (CECILs) are synthesized by crown ethers chelated with sodium benzenesulfonates, and used as a green and environmental catalyst, for the synthesis of tetrahydro-4H-chromene and 1,4-dihydropyridine derivatives by three-component reactions of aromatic aldehydes and malononitrile with cyclic β-dicarbonyls or cyclic β-enaminoketones respectively, in H 2 O/EtOH (1:1), at the reflux condition. CECILs, as a green and environmental catalyst, can be easily obtained and are stable. Furthermore, high conversions, short reaction times, and cleaner reaction profiles are some of the advantages of this method.
ISSN:1741-5993
1741-6000
DOI:10.1080/17415993.2017.1293058