Journal ArticleDOI
Synthesis of 4H‐benzopyrans catalyzed by acyclic acidic ionic liquids in aqueous media
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TLDR
In this article, halogen-free acyclic task-specific ionic liquids (TSILs) were synthesized as novel and recyclable catalysts for the synthesis of 5-oxo-5,6,7,8-tetrahydro-4H-benzo[b]pyrans by one-pot three-component condensation of aromatic aldehyde, malononitrile (or ethyl cyanoacetate), and dimedone (or 1,3-cyclohexanedione) in water.About:
This article is published in Journal of Heterocyclic Chemistry.The article was published on 2009-12-29. It has received 68 citations till now. The article focuses on the topics: Malononitrile & Dimedone.read more
Citations
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Multicomponent reactions in unconventional solvents: state of the art
TL;DR: In this paper, a review summarizes recent results of multicomponent reactions obtained in unconventional media including water, ionic liquids, polyethylene glycol and bio-based solvents.
Journal ArticleDOI
Potassium phthalimide-N-oxyl: a novel, efficient, and simple organocatalyst for the one-pot three-component synthesis of various 2-amino-4H-chromene derivatives in water
TL;DR: In this article, a wide variety of 2-amino-4H-chromene derivatives with diverse substituents on the 4Hchromene ring were efficiently prepared via one-pot, three-component reaction of an aromatic aldehyde, malononitrile (or ethyl cyanoacetate), and diverse enolizable C-H activated acidic compounds in the presence of low loading of potassium phthalimide-N-oxyl (POPINO), as a new organocatalyst, in aqueous media.
Journal ArticleDOI
One-pot synthesis of 4H-benzo[b]pyrans and dihydropyrano[c]chromenes using inorganic–organic hybrid magnetic nanocatalyst in water
Mehdi Khoobi,Leila Ma’mani,Faezeh Rezazadeh,Zeinab Zareie,Alireza Foroumadi,Ali Ramazani,Abbas Shafiee +6 more
TL;DR: In this article, a green and useful method to obtain 4 H -benzo[ b ]pyrans and dihydropyrano[ c ]chromenes in aqueous media is presented.
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Nanozeolite clinoptilolite as a highly efficient heterogeneous catalyst for the synthesis of various 2-amino-4H-chromene derivatives in aqueous media
TL;DR: In this paper, the preparation of pharmaceutically active 2-amino-4H-chromene derivatives has been achieved using a nano powder of natural clinoptilolite (CP) zeolite.
References
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Ionic Liquids-New "Solutions" for Transition Metal Catalysis.
Peter Wasserscheid,Wilhelm Keim +1 more
TL;DR: There are indications that switching from a normal organic solvent to an ionic liquid can lead to novel and unusual chemical reactivity, which opens up a wide field for future investigations into this new class of solvents in catalytic applications.
Journal ArticleDOI
Ionic Liquids--Solvents of the Future?
TL;DR: Rogers and Seddon as discussed by the authors reviewed recent progress on developing new ionic liquid solvents for use in chemical synthesis, catalysis, fuel cells, and other applications.
Journal ArticleDOI
Ionic liquid (molten salt) phase organometallic catalysis.
TL;DR: The advent of water-soluble organometallic complexes, especially those based on sulfonated phosphorus-containing ligands, has enabled various biphasic catalytic reactions to be conducted on an industrial scale and might combine the advantages of both homogeneous and heterogeneous catalysis.
Journal ArticleDOI
Catalytic reactions in ionic liquids
TL;DR: The use of ionic liquids as novel reaction media may offer a convenient solution to both the solvent emission and the catalyst recycling problem, as well as in supercritical carbon dioxide.
Journal ArticleDOI
Protic Ionic Liquids: Properties and Applications
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