期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 158, 期 2, 页码 145-150出版社
ELSEVIER
DOI: 10.1016/j.molliq.2010.11.010
关键词
Benzylidenemalononitriles; 2-Benzylidene-5,5-dimethylcyclohexane-1,3-diones; 2-Amino-5-oxo-4-aryl-4,5-dihydropyrano[3,2-c]chromene-3-carbonitrile; Tetrahydrobenzo[b]pyran; Ionic liquid; Spirooxindole
资金
- University of Sistan
- Baluchestan Research Council
The Knoevenagel condensation reaction of aromatic aldehydes with malononitrile or dimedone was investigated. Also, the three-component and one-pot synthesis of 2-amino-5-oxo-4-aryl-4,5-dihydropyrano [3,2-c]chromene-3-carbonitrile derivatives by condensing 4-hydroxycoumarin, aldehydes and malononitriles using a catalytic amount of 2-hydroxyethylammonium formate as an effective ionic liquid without using any additional co-catalyst under solvent-free conditions at room temperature is reported. Furthermore, the domino Knoevenagel condensation, conjugate addition, and cyclization for the preparation of tetrahydrobenzo[b]pyran, and spirooxindole derivatives in high atomic efficiency take place in excellent yields. (C) 2010 Elsevier B.V. All rights reserved.
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