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Bronsted Acidic Phosphonium Based Ionic Liquid Functionalized Sba-15 [Ho3s-Phospil@Sba-15]: Green, Recyclable, and Efficient Catalyst for the Synthesis of Pyrano[3,2-C]Chromenone Derivatives



Saeedi M1 ; Jeiroudi M2 ; Mamani L3 ; Mahdavi M3 ; Alipour E2 ; Shafiee A3 ; Foroumadi AR3
Authors

Source: Iranian Journal of Chemistry and Chemical Engineering Published:2015

Abstract

The surface of SBA-15 was modified by diphenylphosphine; then, it was treated with butane sultone and sulfuric acid to obtain Bronsted acid HO3S-phosphonium based ionic liquid functionalized SBA-15 with HSO4- as a counteranion. It efficiently catalyzed synthesis of pyrano[3,2-c]chromenone derivatives through the reaction of 4-hydroxycoumarin and chalcones at 60 °C in water/ethanol. Good yields, mild reaction conditions, and user-friendly procedure are advantages of this method. Also, the catalyst could be easily separated and reused five times without significant reduction of activity. © 2015, E-Flow PDF Iranian Journal of Chemistry and Chemical Engineering. All rights reserved.