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Green and efficient synthesis of aryl/alkylbis(indolyl)methanes using Expanded Perlite-PPA as a heterogeneous solid acid catalyst in aqueous media

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Abstract

Expanded Perlite-Polyphosphoric acid (EP-PPA) as a novel, efficient, recyclable and eco-benign heterogeneous catalyst has been applied for the green and rapid synthesis of aryl/alkylbis(indolyl)methanes, in water, in good to excellent yields. The catalyst was characterized by XRF, FT-IR, TGA/DTG, ICP-OES, SEM-EDX and pH analysis. Importantly, the newly synthesized heterogeneous solid acid catalyst can be recovered and reused six times without any significant loss in its catalytic potential. The remarkable features of the present methodology are high conversions, shorter reaction times, cleaner reaction profiles and simple work-up procedures.

The catalytic activity of Expanded Perlite- Polyphosphoric acid (EP-PPA) as a novel, efficient, recyclable and eco-benign heterogeneous catalyst was investigated for the green and rapid synthesis of aryl/alkylbis(indolyl)methanes.

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Acknowledgements

The authors gratefully acknowledge the partial support of this study by Ferdowsi University of Mashhad Research Council (Grant no. p/3/40471).

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  1. Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, 9177948974, Iran

    MARZIEH ESMAIELPOUR, BATOOL AKHLAGHINIA & ROYA JAHANSHAHI

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ESMAIELPOUR, M., AKHLAGHINIA, B. & JAHANSHAHI, R. Green and efficient synthesis of aryl/alkylbis(indolyl)methanes using Expanded Perlite-PPA as a heterogeneous solid acid catalyst in aqueous media. J Chem Sci 129, 313–328 (2017). https://doi.org/10.1007/s12039-017-1246-x

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