Silica-bonded n-propyltriethylene-tetramine as a recyclable solid base catalyst for the synthesis of 2-amino-5-oxo-5,6,7,8-tetrahydro-4H-chromenes
محورهای موضوعی : Iranian Journal of CatalysisMarzieh Makvandi 1 , Fatemeh Abiar Dil 2 , Ameneh Malekzadeh 3 , Mojtaba Baghernejad 4 , Khodabakhsh Niknam 5
1 - Department of Chemistry, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran.
2 - Department of Chemistry, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran.
3 - Department of Chemistry, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran.
4 - Young Researchers and Elite Club, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran.
5 - Department of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr 75169, Iran.
کلید واژه: Synthesis, Catalyst, Silica-bonded n-propyltriethylene-tetramine, Chromenes, Solid bases,
چکیده مقاله :
Silica-bonded n-propyltriethylene-tetramine (SBNPTT) was found as an efficient solid base for the synthesis of 2-amino-5-oxo-5,6,7,8-tetrahydro-4H-chromenes. Chromene derivatives were obtained via the three-component condensation reaction of aromatic aldehydes, malononitrile, and dimedone at 80 oC under solvent-free conditions. The heterogeneous solid base showed much the same efficiency when used in consecutive reaction runs.
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