Polyaniline supported indium chloride: A reusable catalyst for organic transformations in water

Polyaniline supported indium(III) trichloride (PANI-In) catalyst was prepared and thoroughly characterized by using FTIR, XPS, scanning electron microscopy-energy dispersive X-ray analysis (SEM-EDX) and ICP-AES. Thus, the synthesized catalyst was efficiently used in the aza-Michael reaction of amines with electron-deficient olefins and aza-Diels-Alder reaction of cyclic enol ethers with aromatic amines in water. Moreover, the catalyst was easily recovered by simple filtration and reused for several cycles with consistent activity.

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