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Surfactant modified bentonite (CTMAB-bentonite) as a solid heterogeneous catalyst for the rapid synthesis of 3,4-dihydropyrano[c]chromene derivatives
Abstract CTMAB-bentonite was found to be an efficient catalyst for the synthesis of 3,4-dihydropyrano[c]chromene derivatives by one-pot reaction of 4-hydroxycoumarin, aromatic aldehydes, and malononitrile in aqueous ethanol under mild condition. High yields, short reaction time, easy work-up, eco-friendly, non-toxic and reusable catalyst are the advantages of this procedure.
Graphical abstract Display Omitted
Highlights Application of CTMAB-bentonite for the synthesis of dihydropyrano[c]chromenes. Surfactant modified bentonite presented the highest catalytic activity. The surfactant modified bentonite was stable in continuous experiments. The recovered catalyst was reused for five cycles without loss of its activities. A complete catalytic mechanism is proposed.
Surfactant modified bentonite (CTMAB-bentonite) as a solid heterogeneous catalyst for the rapid synthesis of 3,4-dihydropyrano[c]chromene derivatives
Abstract CTMAB-bentonite was found to be an efficient catalyst for the synthesis of 3,4-dihydropyrano[c]chromene derivatives by one-pot reaction of 4-hydroxycoumarin, aromatic aldehydes, and malononitrile in aqueous ethanol under mild condition. High yields, short reaction time, easy work-up, eco-friendly, non-toxic and reusable catalyst are the advantages of this procedure.
Graphical abstract Display Omitted
Highlights Application of CTMAB-bentonite for the synthesis of dihydropyrano[c]chromenes. Surfactant modified bentonite presented the highest catalytic activity. The surfactant modified bentonite was stable in continuous experiments. The recovered catalyst was reused for five cycles without loss of its activities. A complete catalytic mechanism is proposed.
Surfactant modified bentonite (CTMAB-bentonite) as a solid heterogeneous catalyst for the rapid synthesis of 3,4-dihydropyrano[c]chromene derivatives
Sedaghat, M.E. (author) / Rajabpour Booshehri, M. (author) / Nazarifar, M.R. (author) / Farhadi, F. (author)
Applied Clay Science ; 95 ; 55-59
2014-02-18
5 pages
Article (Journal)
Electronic Resource
English
Separation of surfactant modified smectite from bentonite by delamination
| Online Contents | 2008
Separation of surfactant modified smectite from bentonite by delamination
| Online Contents | 2008