In this research study we designed and synthesized CoII(macrocyclic Schiff base ligand containing 1,4‐diazepane) immobilized on Fe3O4 nanoparticles as a novel, recyclable, and heterogeneous catalyst. The nanomaterial was fully characterized using various techniques such as Fourier‐transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X‐ray diffraction, energy‐dispersiveX‐ray spectroscopy, thermogravimetric analysis, vibrating sample magnetometry, differential reflectance spectroscopy, Brunauere–Emmette–Teller method, inductively coupled plasma, and elemental analysis (CHNS). Then, the catalytic performance was successfully investigated in the multicomponent synthesis of 2‐amino‐4‐aryl‐6‐(phenylsulfanyl)pyridine‐3,5‐dicarbonitrile and 2‐amino‐5,10‐dioxo‐4‐aryl‐5,10‐dihydro‐4H‐benzo[g]chromene‐3‐carbonitrile derivatives. Furthermore, the catalyst was isolated using a simple filtration, and recovery of the nanocatalyst was demonstrated five times without any loss of activity.

A dioxomolybdenum complex supported on functionalized Fe3O4 magnetite nanoparticles as a heterogeneous catalyst was synthesized, characterized and used in the synthesis pyrazole derivatives.

The cover image, by Jamshid Rakhtshah et al., is based on the Full Paper Mn(III)–pentadentate Schiff base complex supported on multi‐walled carbon nanotubes as a green, mild and heterogeneous catalyst for the synthesis of tetrahydrobenzo[b]pyrans via tandem Knoevenagel–Michael cyclocondensation reaction, DOI: .

A porous cross‐linked poly (ethyleneamine)‐polysulfonamide (PEA‐PSA) as a novel organic support system is synthesized in the presence of silica template by nanocasting technique. The paper demonstrates immobilization of CuI nanoparticles inside the pores (PEA‐PSA@CuI) for the facile recovery and recycling of these nanoparticles. The presence of porous PEA‐PSA and PEA‐PSA@CuI nanocomposites was confirmed using FT‐IR spectroscopy, FE‐SEM, EDX, TGA, XRD, TEM, BET, XPS, WDX, 1H NMR, and ICP‐OES techniques. The PEA‐PSA@CuI along with Ag(I)/K2S2O8 was implemented as a reusable cooperative catalyst‐oxidant system in the N‐arylation of p‐toluenesulfonamide with substituted carboxylic acids in mild condition. So, the novel decarboxylative cross‐coupling catalyzed by copper and silver has been developed. Aromatic, secondary and tertiary aliphatic acids underwent high efficient decarboxylative processes with p‐toluenesulfonamide to afford the corresponding products. This method provides a practical approach for the flexible synthesis of sulfonamides from the readily affordable substrates. The catalyst is highly reusable and efficient, especially in terms of time and yield of the desired product.

A recoverable molybdenum Schiff‐base complex immobilized on silica‐coated Fe3O4 nanoparticles was prepared and characterized. This superparamagntic nanocatalyst, which is separable using an external magnet, can be used as an efficient catalyst for the promotion of the synthesis of pyranopyrazole derivatives. A variety of desired products were obtained in high to excellent yields within short times. In comparison with other catalysts employed in the condensation of various aromatic aldehydes, malononitrile and 3‐methyl‐1‐phenyl‐2‐ pyrazoline‐5‐one, the present catalyst showed a much higher activity in terms of mild conditions and short reaction time. The catalyst can be reused for several times without significant loss of activity.

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