Nano-Fe3O4Encapsulated-Silica Particles Bearing 3-Aminopropyl Group as a Magnetically Separable Catalyst for Efficient Knoevenagel Condensation of Aromatic Aldehydes with Active Methylene Compounds

2014 ◽  
Vol 32 (4) ◽  
pp. 343-348 ◽  
Author(s):  
Shuo Liu ◽  
Yuxiang Ni ◽  
Jianguo Yang ◽  
Huanan Hu ◽  
Anguo Ying ◽  
...  
Keyword(s):  
Knoevenagel Condensation ◽  
Aromatic Aldehydes ◽  
Silica Particles ◽  
Magnetically Separable Catalyst ◽  
Active Methylene Compounds ◽  
Magnetically Separable ◽  
Active Methylene ◽  
Aminopropyl Group

A solvent free approach for Knoevenagel condensation: facile synthesis of 3-cyano and 3-carbethoxycoumarins

2014 ◽  
Vol 3 (3) ◽  
Author(s):  
Suresh Kumar
Keyword(s):  
Knoevenagel Condensation ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Efficient Synthesis ◽  
Facile Synthesis ◽  
Basic Alumina ◽  
Active Methylene Compounds ◽  
Active Methylene

AbstractA simple, efficient and solvent free approach for the Knoevenagel condensation has been developed which involves grinding of active methylene compounds with aromatic aldehydes over basic alumina. Using this solvent free Knoevenagel approach, a facile and efficient synthesis of 3-cyano and 3-carbethoxycoumarins has also been developed, which involves the grinding of 2-hydroxybenzaldehydes with malononitrile or ethylcyanoacetate respectively over basic alumina followed by grinding with p-toluenesulphonic acid (PTSA) in the same mortar.

Ethylene Glycol: Urea: NH 4 Cl Low Melting Mixture‐Assisted Reactions between Aromatic Aldehydes and Active Methylene Compounds

2021 ◽  
Vol 6 (28) ◽  
pp. 7150-7157
Author(s):  
Letcy V. Theresa ◽  
Saranya Ponmalakunnu ◽  
Anju M. Baby ◽  
Krishnapillai Sreekumar
Keyword(s):  
Ethylene Glycol ◽  
Aromatic Aldehydes ◽  
Active Methylene Compounds ◽  
Active Methylene
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