Bentonite-titana Composite as an Efficient, Eco-friendly and Non-toxic Catalyst for Synthesis of Benzopyran Derivatives Under Heating and Solvent-free Conditions

Author(s): Ali Darehkordi , Mohammad Sadegh Hosseini , Mirrasol Mosavi , Alireza Poorfreidoni .

Journal Name: Letters in Organic Chemistry

Volume 12 , Issue 3 , 2015

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Graphical Abstract:


Bentonite-titana composite was prepared and characterized by XRD, FT-IR and SEM. Results indicate that TiO2 particles have been supported on the bentonite layers and a delaminated structure is formed. Then the bentonitetitana composite as a mild, eco-friendly, non-toxic an efficient heterogeneous catalyst have been used for synthesis of benzopyran derivatives from the three-component condensation reaction of dimedone or barbituric acid, malonoitrile, and aromatic aldehydes under solvent free conditions in good to excellent yield and short reaction times.

Keywords: Bentonite-titana composite, benzopyran, dimedone, malonoitrile, barbituric acid, pyrano[2, 3-d]pyrimidine.

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Article Details

Year: 2015
Page: [159 - 167]
Pages: 9
DOI: 10.2174/1570178612666150108002202
Price: $58

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