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Published:
Oct 14, 2015Keywords:
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Polyaniline/SiO<sub>2</sub> Catalyzed One-pot Synthesis of Tetrahydrobenzo[<i>b</i>]pyran Derivatives
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
