A simple, efficient and environmentally benign route was developed for the preparation of spiro(indoline-3,4-pyrano[2,3-c]pyrazole) derivatives with good yields from condensation of isatins, malononitrile (or ethyl cyanoacetate), hydrazine hydrate and ethyl acetoacetate catalysed by PFu@Fe 3 O 4 nanocomposite. The use of easily available catalyst, shorter reaction times, better yields, simplicity of reaction, heterogeneous system and easy work-up are the advantages of the method presented. Characterization of the catalyst was performed using Fourier transform infrared spectroscopy, X-ray diffraction and transmission electron microscopy.
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