Journal ArticleDOI
Rapid and efficient Knoevenagel condensation catalyzed by a novel protic ionic liquid under ultrasonic irradiation
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TLDR
An efficient and reusable protic-ionic-liquid solvent-catalyst system, HMTA-AcOH-H2O, has been developed and used in the Knoevenagel condensation reaction of aromatic aldehydes with ethyl 2-cyanoacetate as discussed by the authors.Abstract:
An efficient and reusable protic-ionic-liquid solvent–catalyst system, HMTA–AcOH–H2O, has been developed and used in the Knoevenagel condensation reaction of aromatic aldehydes with ethyl 2-cyanoacetate. Under ultrasonic irradiation, the Knoevenagel condensation promoted by the protic-ionic-liquid solvent–catalyst system proceeds smoothly and cleanly. Moreover, the HMTA–AcOH–H2O solvent–catalyst system could be recycled for at least 6 times and no significant loss of activity was observed. This protocol has notable advantages, such as being eco-friendly, the ease of the work-up and reuse of the ionic liquid conveniently, which could help reduce disposal costs and contribute to the development of new catalysts for use in green and continuous chemical processes.read more
Citations
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Journal ArticleDOI
Protic Ionic Liquids: Evolving Structure–Property Relationships and Expanding Applications
TL;DR: It is expected that the fundamental properties of PILs will continue to be explored, along with continued interest in many existing and new applications, such as in electrochemistry, organic and inorganic synthesis, and biological applications.
Journal ArticleDOI
A general post-synthetic modification approach of amino-tagged metal–organic frameworks to access efficient catalysts for the Knoevenagel condensation reaction
TL;DR: In this article, four common transition-metal derived metal-organic frameworks have been extensively investigated as heterogeneous catalyst supports for Knoevenagel condensation reactions, and a simple post-synthetic modification strategy was employed for the rapid and facile introduction of a primary alkyl amino group.
Journal ArticleDOI
Gas uptake, molecular sensing and organocatalytic performances of a multifunctional carbazole-based conjugated microporous polymer
TL;DR: In this paper, a multifunctional carbazole-based conjugated microporous polymer MFCMP-1 is successfully prepared by oxidative coupling polymerization using a single monomer and structurally characterized.
Journal ArticleDOI
Ionic liquids and ultrasound in combination: synergies and challenges
TL;DR: This work critically review the advantages and limitations of the ionic liquid/ultrasound combination in different applications in chemistry, to understand how, and in which respects, it could become an essential tool of sustainable chemistry in the future.
Journal ArticleDOI
Sonochemistry in non-conventional, green solvents or solvent-free reactions
Massimiliano Lupacchini,Massimiliano Lupacchini,Andrea Mascitti,Andrea Mascitti,Guido Giachi,Lucia Tonucci,Nicola d'Alessandro,Jean Martinez,Evelina Colacino +8 more
TL;DR: In this paper, the authors present a survey of studies that combine sonochemistry with green, non-conventional solvents or with no Solvents, evidencing how the most frequently investigated options are water phase, ionic liquids, followed by ethylene glycol and its oligomers, glycerol, and few other biomass-based solvements.
References
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Protic Ionic Liquids: Properties and Applications
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Catalysis in ionic liquids
TL;DR: Hydrogenation of Alkenes and Arenes by Nanoparticles 2624 3.1.2.
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Ionic liquids in heterocyclic synthesis.
TL;DR: Ionic Liquids Presented in This Review 2020 3.1.
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Chromatographic and spectroscopic methods for the determination of solvent properties of room temperature ionic liquids
TL;DR: All evidence points to the ionic liquids as a unique class of polar solvents suitable for technical development, however, further work is needed to fill the gaps in the authors' knowledge of the relationship between ion structures and physicochemical properties.
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Domino reactions in the synthesis of heterocyclic natural products and analogs
Lutz F. Tietze,Nils Rackelmann +1 more
TL;DR: In this article, the authors define the Domino Reaction as a process of two or more bond-forming reactions under identical conditions, in which the subsequent transformation takes place at the func- tionalities obtained in the former transformation.