J. Iran. Chem. Soc., Vol. 8, No. 3 September 2011, pp.851~856.

Current location: JICS Archive > Vol. 8 > No. 3 > Articles : 25

Tungstophosphoric Acid Supported on Silica Gel (H3PW12O40/SiO2) as an Eco-Friendly, Reusable and Heterogeneous Catalyst for the Synthesis of Pyrroles in Solution or under Solvent-Free Microwave Irradiation

A.A. Jafari*, H. Mahmoudi and B.F. Mirjalili

*Department of Chemistry, Faculty of Science, Yazd University, Yazd 89195-741, Iran

Heteropoly acid supported on silica gel (H3PW12O40/SiO2) is easily used as a heterogonous, reusable and efficient catalyst for the synthesis of N-substituted, 2- and 3-unsubstituted pyrroles in solution or under solvent-free microwave irradiation. The catalyst can be easily recovered and reused for several times without loss of activity.

Keywords: H3PW12O40/SiO2, Pyrrole, Clauson-Kass reaction, Microwave, Solvent-free, Amine

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