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Silica-bonded n-propyldiethylenetriamine sulfamic acid as a recyclable solid acid catalyst for the synthesis of coumarin and biscoumarin derivatives | ||
Iranian Journal of Catalysis | ||
مقاله 6، دوره 4، شماره 3، آذر 2014، صفحه 163-173 اصل مقاله (274.28 K) | ||
نوع مقاله: Articles | ||
نویسندگان | ||
Khodabakhsh Niknam* 1؛ Seyed Ahmad Sajadi2؛ Roghayeh Hosseini2؛ Mojtaba Baghernejad3 | ||
1Department of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr 75169, Iran. | ||
2Department of Chemistry, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran. | ||
3Young Researchers and Elite Club, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran. | ||
چکیده | ||
Silica-bonded n-propyldiethylenetriamine sulfamic acid (SBPDSA) was found as an efficient solid acid for the synthesis of coumarins. Coumarin derivatives were obtained via the Pechmann condensation reaction of phenols and β-keto-esters at 80 oC under solvent-free conditions. Also, biscoumarins were obtained via the condensation of aldehydes and 4-hydroxycoumarin in water at reflux conditions. The heterogeneous solid acid showed much the same efficiency when used in consecutive reaction runs. | ||
کلیدواژهها | ||
Silica-bonded n-propyldiethylenetriamine sulfamic acid؛ Coumarins؛ Pechmann reaction؛ Aromatic aldehydes؛ Biscoumarins؛ Solid acids؛ Catalyst | ||
مراجع | ||
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