scholarly journals Cordierite honeycomb monoliths coated with Al(III)/ZrO2 as an efficient and reusable catalyst for the Knoevenagel condensation: A faster kinetics

2020 ◽  
Vol 13 (1) ◽  
pp. 2734-2749
Author(s):  
S.R. Pratap ◽  
S.Z.M. Shamshuddin ◽  
N. Thimmaraju ◽  
M. Shyamsundar
Keyword(s):  
Knoevenagel Condensation ◽  
Reusable Catalyst ◽  
Cordierite Honeycomb

scholarly journals Cellulose sulphuric acid as a biodegradable and reusable catalyst for the Knoevenagel condensation

2010 ◽  
Vol 8 (1) ◽  
pp. 12-18 ◽  
Author(s):  
Kiran Shelke ◽  
Suryakant Sapkal ◽  
Kirti Niralwad ◽  
Bapurao Shingate ◽  
Murlidhar Shingare
Keyword(s):  
Sulphuric Acid ◽  
Knoevenagel Condensation ◽  
Ethyl Cyanoacetate ◽  
Reaction Times ◽  
Significant Loss ◽  
Reusable Catalyst ◽  
Environmental Friendliness ◽  
Solvent Free Condition ◽  
High Yields ◽  
Work Up

AbstractA green, mild and efficient method for Knoevenagel condensation of 3-formylchromone/2-chlroquinoline-3-carbaldehyde with active methylene compounds such as Meldrum’s acid/ethyl cyanoacetate using biosupported cellulose sulphuric acid (CSA) in the solid-state by grinding under solvent-free condition has been developed. This method provides several advantages including environmental friendliness, shor t reaction times, high yields and a simple work-up procedure. Moreover, the CSA was successfully reused for four cycles without significant loss of activity.

scholarly journals A Solvent-Free Protocol for the Green Synthesis of 5-Arylidene-2,4-thiazolidinediones Using Ethylenediamine Diacetate as Catalyst

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Yuliang Zhang ◽  
Zhongqiang Zhou
Keyword(s):  
Knoevenagel Condensation ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Efficient Synthesis ◽  
Reaction Conditions ◽  
Solvent Free Conditions ◽  
High Yields ◽  
Work Up ◽  
Solvent Free Reaction

A simple and efficient synthesis of 5-arylidene-2,4-thiazolidinediones by the Knoevenagel condensation of aromatic aldehydes with 2,4-thiazolidinedione catalyzed by ethylenediamine diacetate under solvent-free conditions is described. The major advantages of this method are simple experimental and work-up procedures, solvent-free reaction conditions, small amount of catalyst, short reaction time, high yields, and utilization of an inexpensive and reusable catalyst.

ChemInform Abstract: Dicalcium Phosphate Dihydrate DCPD as a Highly Efficient and Reusable Catalyst for Knoevenagel Condensation.

ChemInform ◽  
2016 ◽  
Vol 47 (31) ◽  
Author(s):  
Zakaria Benzekri ◽  
Khalid El Mejdoubi ◽  
Said Boukhris ◽  
Brahim Sallek ◽  
Brahim Lakhrissi ◽  
...  
Keyword(s):  
Knoevenagel Condensation ◽  
Dicalcium Phosphate ◽  
Reusable Catalyst ◽  
Dicalcium Phosphate Dihydrate ◽  
Highly Efficient ◽  
Phosphate Dihydrate

Polyguanidine as a Highly Efficient and Reusable Catalyst for Knoevenagel Condensation Reactions in Water

2013 ◽  
Vol 66 (4) ◽  
pp. 500 ◽  
Author(s):  
Xian-Liang Zhao ◽  
Ke-Fang Yang ◽  
Xuan-Gan Liu ◽  
Chun-Lin Ye ◽  
Li-Wen Xu ◽  
...  
Keyword(s):  
Knoevenagel Condensation ◽  
Knoevenagel Reaction ◽  
Reusable Catalyst ◽  
Efficient Catalyst ◽  
Condensation Reactions ◽  
Highly Efficient ◽  
Wide Range ◽  
Active Methylene Compounds ◽  
Simple Filtration ◽  
Active Methylene

Polyguanidine is used as a novel and highly efficient catalyst in the Knoevenagel reaction of aldehydes with active methylene compounds in water to afford substituted electrophilic alkenes. This method is applicable for a wide range of aldehydes including aromatic and heterocyclic substrates. The polyguanidine catalyst can be recovered by simple filtration and reused many times for the aqueous Knoevenagel reaction without loss of activity.

scholarly journals Dicalcium phosphate dehydrate DCPD as a highly efficient and reusable catalyst for Knoevenagel condensation

2016 ◽  
Vol 46 (5) ◽  
pp. 442-451 ◽  
Author(s):  
Zakaria Benzekri ◽  
Khalid El Mejdoubi ◽  
Said Boukhris ◽  
Brahim Sallek ◽  
Brahim Lakhrissi ◽  
...  
Keyword(s):  
Knoevenagel Condensation ◽  
Dicalcium Phosphate ◽  
Reusable Catalyst ◽  
Highly Efficient
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