Issue 9, 2008
From the journal:

Green Chemistry

A revision for the synthesis of β-enaminones in solvent free conditions: efficacy of different supported heteropoly acids as active and reusable catalysts

Ezzat Rafiee,*ab   Mohammad Joshaghani,ab   Sara Eavania  and  Solmaz Rashidzadeha  

* Corresponding authors

a Department of Chemistry, Faculty of Science, Razi University, Kermanshah, Iran
E-mail: ezzatrafiee@yahoo.com, e.rafiei@razi.ac.ir
Fax: +98 831 4274559
Tel: +98 831 4274559

b Kermanshah Oil Refining Company, Kermanshah, Iran

Abstract

Catalytic performance of different supported heteropoly acids (HPAs) in the synthesis of β-enaminones and β-enamino esters from various substituted amines and β-diketones or β-keto esters has been studied. In order to improve the yield and reaction time, the effect of various solvents, HPA loading, different amount of the catalyst and solventless conditions have been investigated. 40% (w/w) PW/SiO2 was found to be a very efficient and reusable catalyst in comparison with others, under solvent free conditions. In this eco-friendly approach, the usage of organic solvents and hazardous reagents were minimized. Also, a high yield of products within short reaction times were obtained.

Graphical abstract: A revision for the synthesis of β-enaminones in solvent free conditions: efficacy of different supported heteropoly acids as active and reusable catalysts

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Article information

DOI
https://doi.org/10.1039/B803249A
Article type
Paper
Submitted
25 Feb 2008
Accepted
25 Jun 2008
First published
08 Aug 2008

Green Chem., 2008,10, 982-989

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A revision for the synthesis of β-enaminones in solvent free conditions: efficacy of different supported heteropoly acids as active and reusable catalysts

E. Rafiee, M. Joshaghani, S. Eavani and S. Rashidzadeh, Green Chem., 2008, 10, 982 DOI: 10.1039/B803249A

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