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.

Microporous Silicon Nitride-Based Solid Bases

1998 ◽  
Vol 549 ◽  
Author(s):  
J. S. Bradley ◽  
O. Vollmer ◽  
R. Rovai ◽  
F. Lefebvre
Keyword(s):  
Surface Area ◽  
Condensation Reaction ◽  
High Surface ◽  
High Surface Area ◽  
Organic Content ◽  
Gaseous Ammonia ◽  
Solid Base ◽  
Solid Base Catalysts ◽  
Base Catalysts ◽  
Knoevenagel Condensation Reaction

AbstractHigh surface area, microporous, amorphous silicon imidonitride, characterized by infrared spectroscopy, MAS 29Si NMR and surface area and porosity measurements has been prepared by the treatment of co-oligomers of methylsilazane and dimethyl silazanes with gaseous ammonia at temperatures up to 700°C. The material has a narrow pore-size distribution showing a maximum in the range associated with wide- pore zeolites (ca. 0.72 nm mean). Variation of the organic content of the silazane is a means of controlling the surface area of the resulting solid. The Knoevenagel condensation reaction of benzaldehyde with a series of active methylene compounds has been used to probe the basicity and size-selectivity of these microporous solid base catalysts.

Amine-functionalized MgAl LDH nanosheets as efficient solid base catalysts for Knoevenagel condensation

2018 ◽  
Vol 449 ◽  
pp. 31-37 ◽  
Author(s):  
Huanhuan Jia ◽  
Yuan Zhao ◽  
Panpan Niu ◽  
Ningyue Lu ◽  
Binbin Fan ◽  
...  
Keyword(s):  
Knoevenagel Condensation ◽  
Solid Base ◽  
Solid Base Catalysts ◽  
Base Catalysts ◽  
Amine Functionalized

Efficient heterogeneous catalysis by dual ligand Zn(ii)/Cd(ii) MOFs for the Knoevenagel condensation reaction: adaptable synthetic routes, characterization, crystal structures and luminescence studies

2018 ◽  
Vol 5 (10) ◽  
pp. 2630-2640 ◽  
Author(s):  
Bhavesh Parmar ◽  
Parth Patel ◽  
Vishnu Murali ◽  
Yadagiri Rachuri ◽  
Rukhsana I. Kureshy ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Crystal Structures ◽  
Heterogeneous Catalysts ◽  
Knoevenagel Condensation ◽  
Condensation Reaction ◽  
Knoevenagel Condensation Reaction ◽  
Synthetic Routes

Chemically stable Zn(ii)/Cd(ii) MOFs as a heterogeneous catalysts for Knoevenagel condensation.

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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