Magnetically separable nano CuFe₂O₄: an efficient and reusable heterogeneous catalyst for the green synthesis of thiiranes from epoxides with thiourea

NiFe2O4@SiO2–Cu as a novel and efficient magnetically recoverable nanocatalyst for regioselective synthesis of β-thiol-1,2,3-triazoles under benign conditions

“…In continuation of our research on the successful synthesis of magnetic nanoparticles, 59–64 herein, we would like to introduce the novel recoverable NiFe 2 O 4 @SiO 2 –Cu nanocatalyst for the three-component regioselective procedure for synthesis of β-thiol-1,4-disubstituted-1,2,3 triazoles from sodium azide, thiiranes, and terminal alkynes in water at room temperature (Scheme 1).…”

A uniformly anchored zirconocene complex on magnetic reduced graphene oxide (rGO@Fe3O4/ZrCp2Clx(x= 0, 1, 2)) as a novel and reusable nanocatalyst for synthesis ofN-arylacetamides and reductive-acetylation of nitroarenes

“…These improvements have been made in order to increase the accessible sites/zones on the surface of catalyst, greater catalyst reactivity and selectivity, thermal stability and nally easy separation. Fe 3 O 4 , 12,13 NiFe 2 O 4 , [14][15][16] CoFe 2 O 4 , 17 CuFe 2 O 4 , [18][19][20] MnFe 2 O 4 , 21 Ni-Cu-ZnFe 2 O 4 , 22 BiFeO 3 , 23 FeAl 2 O 4 24 and ZnCrFeO 4 25 as a core, and metals, [26][27][28] silica, [29][30][31][32] polymers, [33][34][35] carbon nanotubes and sheets, [36][37][38][39][40] cellulose, 41 small organic molecules, 42,43 ionic liquids, 44,45 and organosulfonic acids 46,47 have been used as a coating.…”

The promoted synthesis of minoxidil by magnetic nanoparticles of cobalt ferrite(CoFe2O4) as a heterogeneous reusable catalyst

“…As a part of our research program on the synthesis of nanomagnetic materials and their application in functional group transformations [20][21][22], herein, we wish to introduce nanospinel ferrites as efficient and reusable heterogeneous catalysts for N -oxidation of 6-chloro-2,4-diaminopyrimidine to 2,6-diamino-4-chloropyrimidine N -oxide by H 2 O 2 in ethanol under reflux conditions. Then, through the nucleophilic reaction of piperidine with 2,6-diamino-4-chloro-pyrimidine N -oxide, minoxidil (2,4-diamino-6-piperidino-pyrimidine 3oxide) was produced in high yield and purity ( Figure 1).…”