Rezvani• We applied magnetics NiFe 2 O 4 as a recoverable catalyst in the multicomponent reaction of substituted pyrroles • Magnetic NiFe 2 O 4 could be recovered from the reaction easily with an external magnet and be used nine times without significant activity loss. •The catalytic activity of magnetic NiFe 2 O 4 nanoparticles were less studied in organic reactions. • The reaction conditions is mild and the process of catalyst preparation is simple.• The yields are high.In this study nickel ferrite magnetic nanoparticles were applied as an efficient and reusable catalyst in the four-component synthesis of substituted pyrroles under neat conditions. The reaction was conducted using various amounts of catalyst at different temperatures and finally, application of 5 mol% of catalyst at 100°C was determined as the optimum reaction conditions. Results showed that nickel ferrite nanoparticles could catalyze the reaction at relatively short times (3-4 h) with high to excellent yields (70-96%). The catalyst could be recovered easily using an external magnetic field and be reused for nine times without any significant activity lost.

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The inside cover picture, by Kerr and co‐workers, depicts a series of robust, yet highly active Ir(I) complexes bearing specifically encumbered N‐heterocyclic carbene and phosphine ligands. These complexes are extremely effective in hydrogen isotope exchange processes (with D or T), with low catalyst loadings, good levels of selectivity, and broad directing group applicability. The labelling of several complex drug molecules further highlights the catalysts utility. Mechanistic insight into the operation of these catalysts has also been provided by a combination of NMR and theoretical DFT studies. Details of this work can be found in the full paper on .

Magnetic nickel ferrite nanoparticles are found to be an efficient catalytic system for cyanation reactions of various types of aryl halides under conventional heating conditions. All the reactions result in very good to excellent yields under optimized reaction conditions. Furthermore, the catalyst is easily removed from the reaction medium and can be reused further in several subsequent runs. Copyright © 2014 John Wiley & Sons, Ltd.

Efficient amination and amidation of aryl halides is achieved using NiFe 2O nanoparticles as catalyst (75 examples in all). -(MOGHADDAM*, F. M.; TAVAKOLI, G.; MOAFI, A.; SABERI, V.; REZVANI, H. R.; ChemCatChem 6 (2014) 12, 3474-3481, http://dx.doi.org/10.1002/cctc.201402556 ; Dep. Chem., Sharif Univ. Technol., Tehran, Iran; Eng.) -R. Staver 19-064