Author/Authors :
Iravani، Nasir نويسنده Department of Chemistry, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran , , Keshavarz، Mosadegh نويسنده Department of Gas and Petroleum, Yasouj University, Yasouj, Zip Code 75918-74831, Iran , , Mousavi، Maryam نويسنده Department of Chemistry, Faculty of Science, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran. , , Baghernejad، Mojtaba نويسنده Young Researchers and Elite Club, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran ,
Abstract :
A novel catalytic synthesis of 3,3ʹ-(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.
