J. Iran. Chem. Soc., Vol. 8, No. 3 September 2011, pp.862~871.

Current location: JICS Archive > Vol. 8 > No. 3 > Articles : 27

Phosphinite Ionic Liquid (IL-OPPh2) as a Recyclable Reagent for the Efficient Synthesis of Coumarins under Microwave Irradiation Conditions

H. Valizadeh*, H. Gholipour and M. Mahmoudian

Department of Chemistry, Faculty of Sciences, Azarbaijan University of Tarbiat Moallem, Tabriz, Iran

Task-specific phosphinite ionic liquid (IL-OPPh2) was used as a reagent for the efficient synthesis of 4-substituted coumarins via the reaction of di(methyl or ethyl) acetylenedicarboxylate with phenolic compounds under microwave irradiation conditions. The effects of parameters such as the amount of the phosphinite ionic liquid, reaction temperature and reaction time on this procedure were investigated. Products were obtained in good yields using this mild and one-pot methodology under solvent-free conditions. In addition, the ionic liquid recycling test showed that it could be reused for three times without loss of its activity.

Keywords: Coumarin, Microwave, Phosphinite ionic liquid, Solvent-free, Task-specific ionic liquid

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