scholarly journals Solvent-free Knoevenagel reaction catalysed by reusable pyrrolidinium base protic ionic liquids (PyrrILs): synthesis of long-chain alkylidenes

RSC Advances ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 3214-3221 ◽  
Author(s):  
R. C. M. Alves Sobrinho ◽  
P. M. de Oliveira ◽  
C. R. Montes D'Oca ◽  
D. Russowsky ◽  
M. G. Montes D'Oca
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Knoevenagel Condensation ◽  
Condensation Reaction ◽  
Solvent Free ◽  
Knoevenagel Reaction ◽  
Protic Ionic Liquids ◽  
Knoevenagel Condensation Reaction ◽  
Pyrrolidinium Ionic Liquid ◽  
Long Chain

In this work, an efficient and reusable pyrrolidinium ionic liquid (PyrrIL) catalysis system was developed and used in a Knoevenagel condensation reaction of long-chain aldehydes with several 1,3-dicarbonyl compounds.

Two new calix[4]resorcinarene-based coordination cages adjusted by metal ions for the Knoevenagel condensation reaction

2021 ◽  
Author(s):  
Wen-Yuan Pei ◽  
Bing-Bing Lu ◽  
Jin Yang ◽  
Tianqi Wang ◽  
Jian-Fang Ma
Keyword(s):  
Metal Ions ◽  
Knoevenagel Condensation ◽  
Condensation Reaction ◽  
Solvent Free ◽  
Catalytic Activities ◽  
Solvent Free Conditions ◽  
Coordination Cages ◽  
Knoevenagel Condensation Reaction

Two new calix[4]resorcinarene-based metal-coordinated cages have been synthesized through tuning metal ions, where they featured catalytic activities for the Knoevenagel condensation reaction under solvent-free conditions.

scholarly journals Layered double hydroxide anchored ionic liquids as amphiphilic heterogeneous catalysts for the Knoevenagel condensation reaction

2018 ◽  
Vol 47 (9) ◽  
pp. 3059-3067 ◽  
Author(s):  
Tengfei Li ◽  
Wei Zhang ◽  
Wei Chen ◽  
Haralampos N. Miras ◽  
Yu-Fei Song
Keyword(s):  
Heterogeneous Catalysts ◽  
Knoevenagel Condensation ◽  
Condensation Reaction ◽  
Knoevenagel Reaction ◽  
Solid Base ◽  
Solid Base Catalysts ◽  
Base Catalysts ◽  
Excellent Activity ◽  
Knoevenagel Condensation Reaction ◽  
Double Hydroxide

In this paper, three solid base catalysts of LDH-IL-Cn (n = 4, 8, 12) were synthesized by adopting an exfoliation/assembly approach. The as-prepared catalyst showed excellent activity and selectivity for the Knoevenagel reaction in aqueous solution.

scholarly journals Knoevenagel condensation reaction catalysed by agro-waste extract as a greener solvent catalyst

2021 ◽  
Vol 14 (1) ◽  
pp. 81-91
Author(s):  
Krishnappa B. Badiger ◽  
Kantharaju Kamanna
Keyword(s):  
Solvent Extraction ◽  
Organic Solvent ◽  
Present Method ◽  
Knoevenagel Condensation ◽  
Condensation Reaction ◽  
Knoevenagel Reaction ◽  
Organic Solvent Extraction ◽  
Knoevenagel Condensation Reaction ◽  
Waste Extract ◽  
Heterocyclic Aldehydes

This paper present a novel Knoevenagel reaction protocol for the condensation of aromatic/heteroaromatic aldehydes with malononitrile to give α, β–unsaturated benzylidene derivatives. The main focus of this work is to reveal the usability of agro-waste extracts as a catalyst in the Knoevenagel condensation. The present protocol proceeds efficiently for various substituted aromatic and heterocyclic aldehydes in the Knoevenagel reactions. In addition, the present method describes direct isolation of the formed products without using organic solvent extraction gave good yields product.

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