RESEARCH ARTICLE

 

Polyaniline/SiO₂ catalyzed one-pot synthesis of tetrahydrobenzo[b]pyran derivatives

 

 

Ajeet A. Yelwande; Balasaheb R. Arbad; Machhindra K. Lande^*

Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, (MS) - 431 004, India

 

 

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ABSTRACT

Polyaniline/SiO₂ is an efficient catalyst for the synthesis of tetrahydrobenzo[b]pyran derivatives from a one-pot, three component, condensation of aldehydes, malononitrile and dimedone at room temperature. This protocol has several advantages such as high yield, a simple work up procedure, low toxicity and easy recovery and reusability of the catalytic material. The catalyst has been readily prepared and characterized by means of thermal analysis (TG-DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR).

Keywords: Chemical oxidative method, Polyaniline/SiO₂, tetrahydrobenzo[b]pyran

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Full text available only in PDF format.

 

Acknowledgements

The authors are grateful to the Head ot the Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, India, for providing the laboratory facility.

 

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Received 20 August 2010
Revised 27 October
Accepted 19 November 2010

 

 

* To whom correspondence should be addressed. E-mail: mkl_chem@yahoo.com