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Nano-cellulose/BF3/Fe3O4: a magnetic bio-based nano-catalyst for the synthesis of pyrimido[2,1-b]benzothiazoles under solvent-free conditions

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Abstract

Nano-cellulose/BF3/Fe3O4 is a bio-based and eco-friendly catalyst with high catalytic activity. Easy separation with an external magnet and recyclability without significant loss of its activity are some advantages of this catalyst. Nano-cellulose/BF3/Fe3O4 was characterized by Fourier transform infrared spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray fluorescence, vibrating sample magnetometry, thermogravimetric analysis, and BET theory. The catalyst was applied for the synthesis of 4H-pyrimido[2,1-b]benzothiazole derivatives via one-pot condensation of aldehydes, 2-aminobenzothiazol and ethyl acetoacetate, under solvent-free conditions at 100 °C. This method offers several advantages including easy work-up, excellent yields and short reaction time.

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Acknowledgement

The Research Council of Yazd University is gratefully acknowledged for the financial support for this work.

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Authors and Affiliations

  1. Department of Chemistry, College of Science, Yazd University, P.O. Box 89195-741, Yazd, Islamic Republic of Iran

    Bi Bi Fatemeh Mirjalili & Fatemeh Aref

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  1. Bi Bi Fatemeh Mirjalili
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  2. Fatemeh Aref
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Correspondence to Bi Bi Fatemeh Mirjalili.

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Mirjalili, B.B.F., Aref, F. Nano-cellulose/BF3/Fe3O4: a magnetic bio-based nano-catalyst for the synthesis of pyrimido[2,1-b]benzothiazoles under solvent-free conditions. Res Chem Intermed 44, 4519–4531 (2018). https://doi.org/10.1007/s11164-018-3401-5

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