CuFe2O4 Nanoparticles: A Magnetically Recoverable Catalyst for Selective Deacetylation of Carbohydrate Derivatives

Abstract

An efficient protocol for the rapid room temperature deacetylation of carbohydrate derivatives using CuFe 2 O 4 nanoparticles as an inexpensive and reusable catalyst is presented. After separation of the catalyst with an external magnet, the reaction products are easily obtained in good purity and excellent yields.

Recyclable and reusable nano-CuFe2O4 catalyzed C-O cross-coupling

“…These significant peaks appeared both in fresh and reused catalyst (Supplementary Figure S1). In addition, the powder Xray diffraction analysis, [59] showed identical peaks for both the fresh and recovered CuFe2O4 nanoparticles (Supplementary Figure S2).…”

One‐Step Synthesis of Xanthones and Thio‐Xanthones by Using Magnetically Separable Copper ferrite Nanoparticles as a Catalyst under Ligand Free Conditions

“…Scanning electron microscope (SEM) studies of both fresh and used catalysts were carried out to understand the morphology of the catalyst. Figure S1 showed the SEM, [26] images of the fresh and the used catalyst after the fourth cycle, respectively. Interestingly, it is showed that there was no distinguished alteration in the morphology of the catalyst before and after the reaction.…”

Magnetically Separable and Reusable Copper Ferrite Nanoparticles for Cross‐Coupling of Aryl Halides with Diphenyl Diselenide

“…The XRD pattern of the CuFe 2 O 4 nanoparticles showed that identical peaks appeared in the fresh catalyst and the used catalyst. FTIR [28] spectra are presented in Figure S3a,b (Supporting Information), and significant bands in the range 600-400 cm -1 prove the presence of CuFe 2 O 4 peaks. These peaks appeared both in the fresh and reused catalyst.…”

“…[27] As a part of our ongoing research program and continuous interest in the field of cross-coupling reactions aimed at the exploration of new synthetic protocols focused on the development of reusable catalysts for the formation of aryl-selenium bonds, Cu/Febased catalysts were examined for their catalytic efficiency, due to their economic and industrial importance. We herein report a significant finding on the use of magnetically separable copper ferrite (CuFe 2 O 4 ) nanoparticles [28] as catalysts for C-Se coupling processes. To the best of our knowledge, this is the first report on the copper ferrite (CuFe 2 O 4 ) nanoparticle catalyzed coupling of aryl iodides/bromides with diphenyl diselenide to form aryl selenides in a very efficient manner.…”

“…Figure S1a,b (Supporting Information) shows the SEM image of the CuFe 2 O 4 catalyst before and after the cycle, and it was observed that the morphology and size of the nanoparticle did not change considerably, even after the third cycle. The XRD [28] pattern of the CuFe 2 O 4 nanoparticles is presented in Figure S2a,b (Supporting Information) before and after use. It was observed that the diffraction signals of Cu-Fe 2 O 4 appeared at 2θ values, which were compared with those reported in the literature.…”