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Melamine trisulfonic acid: An efficient and recyclable solid acid catalyst for the green synthesis of Biscoumarin derivatives | ||
Iranian Journal of Catalysis | ||
مقاله 9، دوره 5، شماره 1، خرداد 2015، صفحه 65-71 اصل مقاله (1.01 M) | ||
نوع مقاله: Articles | ||
نویسندگان | ||
Nasir Iravani* 1؛ Mosadegh Keshavarz2؛ Maryam Mousavi3؛ Mojtaba Baghernejad4 | ||
1Department of Chemistry, Faculty of Science, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran. | ||
2Department of Gas and Petroleum, Yasouj University, Yasouj, Zip Code 75918-74831, Iran | ||
3Department of Chemistry, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran | ||
4Young and Reasearcers Elite, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran | ||
چکیده | ||
A novel catalytic synthesis of 3,3'-(arylmethylene)-bis-(4-hydroxy-2H-chromene-2-one) derivatives from a tandem condensation reaction of 4-hydroxycoumarin and aromatic aldehydes has been developed. The reaction occurs in water in the presence of Melamine trisulfonic acid as catalyst to give the corresponding products in good to high yields. This green approach has several advantages such as short reaction times, clean reaction profiles, and simple experimental and workup procedures. Moreover, the catalyst can be easily recovered by filtration and used at least seven times with only slight reduction in its catalytic activity. The results of the presented protocol in comparison with the different available catalysts in condensation reaction of benzaldehyde with 4-Hydroxycoumarin show that MTSA presented better results due to the structure of MTSA. | ||
کلیدواژهها | ||
Aromatic aldehydes؛ Biscoumarins؛ 4-hydroxycoumarin؛ Melamine trisulfonic acid | ||
مراجع | ||
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