Majid Mohammadnia

In this study, 2,7-Diaminophenazine supported on nanocellulose (DAP@CNC) was designed. The prepared nanocatalyst was characterized with various analytical techniques such as FTIR, XRD, TGA, SEM, TEM, and CHN. Nanocatalyst used for the synthesis of isoxazolo[4,3-e]indazole derivatives via the nucleophilic substitution of a hydrogen in 5-nitro-1-p-tolyl-1H-indazole with different 2-phenylacetonitrile derivatives in basic medium. Also, we did this reaction with KOH as other catalyst. The mechanism of the reaction investigated by density functional theory based modeling is also reported. Simple procedure, high yields, short reaction time and environmentally benign method are advantages of this protocol. The nanocatalyst was readily separated by filter and reusable without significant loss of its catalytic efficiency.

Pd supported on 5-carboxyoxindole functionalized cell@Fe₃O₄ nanoparticles (Pd@CAI@cell@Fe₃O₄), a new magnetic nanocatalyst, was prepared and characterized.

Copper supported on 2‐(1H‐benzo[d]imidazol‐2‐yl)aniline (BIA)‐functionalized Fe₃O₄ nanoparticles (Cu‐BIA‐Si‐Fe₃O₄) as a novel magnetic catalyst was designed and used for the synthesis of new products via Ullmann and Suzuki cross‐coupling reactions. The Ullmann reaction was performed by mixing arylboronic acid with aniline derivatives in dimethylsulfoxide solvent. Also, diaryls were synthesized via Suzuki C–C reactions between aryl halides and phenylboronic acid in the same solvent. The prepared materials and catalyst were characterized with various analytical techniques. The Cu‐BIA‐Si‐Fe₃O₄ catalyst demonstrated catalytic efficiency with good to excellent yields for both types of reactions in comparison with commercial palladium catalysts. Also, the catalyst could be recovered by a simple filtration and retained its activity even after several cycles.

In this study, Pd based on 2‐Aminopyrimidine and 1H‐benzo[d]imidazol‐2‐amine functionalized Fe₃O₄ magnetic nanoparticles [(Pd‐APM‐PSi‐Fe₃O₄) and (Pd‐BIA‐PSi‐Fe₃O₄)] was designed and used for the synthesis of di aryl ether by Ulmann cross‐coupling reactions. Ulmann reaction performed with mixing of the arylhalides and phenol derivatives in DMF solvent. The prepared catalysts were characterized with various analytical techniques such as FT‐IR, XRD, TGA, SEM, TEM, EDX, ICP and VSM. Pd‐APM‐PSi‐Fe₃O₄ and Pd‐BIA‐PSi‐Fe₃O₄ catalysts demonstrated good to excellent yields catalytic efficiency for Ulmann reactions in comparison with to commercial palladium catalysts. The catalyst is easily recycled and reused without loss of the catalytic activity. The combined merits of reusable catalyst conditions make the condensation with safe operation, no leaching of pd into environment, low pollution, rapid access to products and simple workup. Also, these novel magnetic nanocatalysts are superior to the industry standard Pd in every relevant aspect. They feature a way higher initial activity, a much more convenient separation, better recycling, and less contamination of the products. Last but not least, they can be very easily prepared from commercially available Fe₃O₄ nanoparticles using standard laboratory equipment.