Efficient Synthesis of Benzo[g]- and Benzo[h]chromene Derivatives by One-Pot Three-Component Condensation of Aromatic Aldehydes with Active Methylene Compounds and Naphthols.

ChemInform ◽  
2007 ◽  
Vol 38 (22) ◽  
Author(s):  
B. Sunil Kumar ◽  
N. Srinivasulu ◽  
R. H. Udupi ◽  
B. Rajitha ◽  
Y. Thirupathi Reddy ◽  
...  
Keyword(s):  
Aromatic Aldehydes ◽  
Efficient Synthesis ◽  
One Pot ◽  
Active Methylene Compounds ◽  
Active Methylene

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

scholarly journals Tandem four-component reaction for efficient synthesis of dihydrothiophene with substituted amino acid ethyl esters

RSC Advances ◽  
2018 ◽  
Vol 8 (40) ◽  
pp. 22498-22505 ◽  
Author(s):  
Jing Sun ◽  
Yu Zhang ◽  
Chao-Guo Yan
Keyword(s):  
Amino Acid ◽  
Aromatic Aldehydes ◽  
Ethyl Esters ◽  
Efficient Synthesis ◽  
One Pot ◽  
The One

The one-pot four-component reaction of aromatic aldehydes, malononitrile, 1,3-thiazolidinedione and ethyl glycinate hydrochloride in ethanol in the presence of triethylamine afforded trans-dihydrothiophene.

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