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Issue 47, 2013
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Synthesis of novel pyrazolylbiscoumarin derivatives using FeTUD-1 as a mesoporous solid acid catalyst

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Abstract

A series of novel pyrazolyl biscoumarins was synthesized at 80 °C in a one pot procedure using an Fe3+ incorporated mesoporous silicate catalyst (FeTUD-1). The wormhole structured FeTUD-1 catalyzed the condensation of pyrazole aldehyde (1,3-diphenyl-1H-pyrazole-4-carbaldehyde) and 4-hydroxy coumarin to give the product in ∼85% yield. XRD and N2 sorption studies of FeTUD-1 confirmed its amorphous, mesoporous nature, which possessed a large surface area of 638 m2 g−1 and a pore diameter of 9.4 nm. The nature of Fe3+ ion co-ordination within the silica matrix was evaluated by different techniques including diffuse reflectance UV-Vis, FTIR, and EPR. FeTUD-1 possessed both Brønsted and Lewis acidity, as measured by FTIR of pyridine adsorption, that are responsible for the observed activities.

Graphical abstract: Synthesis of novel pyrazolylbiscoumarin derivatives using FeTUD-1 as a mesoporous solid acid catalyst

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Publication details

The article was received on 26 Jul 2013, accepted on 01 Oct 2013 and first published on 02 Oct 2013


Article type: Paper
DOI: 10.1039/C3RA43913E
Citation: RSC Adv., 2013,3, 25367-25373
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    Synthesis of novel pyrazolylbiscoumarin derivatives using FeTUD-1 as a mesoporous solid acid catalyst

    K. Kandasamy, M. P. Pachamuthu, M. Muthusamy, S. Ganesabaskaran and A. Ramanathan, RSC Adv., 2013, 3, 25367
    DOI: 10.1039/C3RA43913E

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