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Bentonite has a potential for the catalytic carrier because their surface and special structure are very suitable for supporting transition metals. This clay as a nontoxic, inexpensive, freely available and abundant natural mineral was used to synthesize magnetic nanocomposite of palladium as a super stable and recoverable green catalyst (Fe3O4/Bentonite-Pd). The catalytic activity of this system was evaluated in the Suzuki cross-coupling reaction. Determination of novel nanoparticles structure was performed using FT‐IR, XRD, VSM, TGA, and SEM–EDX spectral data.

Clays are nontoxic, inexpensive, abundant, and have great potential as catalytic carriers because of their special structure, surface, and suitability for supporting transition metals. In this study, sepiolite was used as a ligand for the heterogenization of palladium chloride on Fe3O4 nanoparticle surface as a novel, high temperature stable, and recoverable green catalyst (Fe3O4@sepiolite-Pd2+). The catalytic activity of this system was tested in the reduction of nitroarene compounds and the Suzuki cross-coupling reaction. The catalyst structure was characterized using spectroscopic data and magnetic and thermal techniques such as Fourier transform infrared, scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction, vibrating sample magnetometer (VSM), and thermogravimetric analysis.

Several new azo-substituted amidoalkyl naphthol derivatives were synthesized by coupling of octahydro-1H-xanthen and phenol nucleus with diazotized 4-amino benzamide and conversion of the coupling product to amidoalkyl naphthols. This is the first report on the synthesis of amidoalkyl naphthol compounds using benzamide with large azo substituents. Furthermore, antimicrobial activities of all new compounds were studied by in vitro experiment. Some synthesized compounds exhibited potential antimicrobial activities which may guarantee their future application in moderate chemotherapy.

A short route toward β-lactams from tolmetin has been developed. In the key step, a ketene was generated on the C-2 of pyrrole ring and reacted with aromatic imines to form trans-β-lactams as the only observed products. The identification of the ketene was confirmed by reaction with the stable free radical TEMPO (TO·).