CuFe2O4 nanoparticles as a highly efficient and magnetically recoverable catalyst for the synthesis of medicinally privileged spiropyrimidine scaffolds

Abstract

CuFe 2 O 4 nanoparticles as a highly efficient and magnetically recoverable catalyst for the synthesis of medicinally privileged spiropyrimidine scaffolds3

Synthesis and characterization of magnetically recoverable 1-(copperferritesiloxypropyl)-3-methylimidazolium heteropolytungstate ionic liquid as a new nanocatalyst for the preparation of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones

“…The progress of the catalytic reaction was monitored by thin layer chromatography. 2 O with molar ratio of 1:2 in basic solution, as reported by Dandia et al [16].…”

Synthesis of sulfanylidene-diazaspirocycloalkanones in a three-component Mannich-type reaction catalyzed with lactic acid

“…In the earlier studies of the three-component reactions of amines and formaldehyde with β-diketones, β-keto esters 9 or cyclohexanone, 11,20 double aminomethylation was observed to occur at the -carbon atom. Six molecules of reactants were involved and six new covalent bonds were formed in this one-pot, threecomponent reaction.…”

“…16 The advantages offered by lactic-acid catalysis prompted us to make some preliminary experiments of its use with compounds other than thioamides, and, thus, to find out if it has a more universal applicability to the Mannich-type MCRs. Cyclohexanone was selected as the model reagent since its reactions with aromatic amines and formaldehyde have been studied earlier by numerous authors [9][10][11][12]20 in investigations using both typical and unusual catalysts. The reactions with p-tolylamine, p-bromoaniline, and p-nitroaniline were carried out by us at room temperature in a DMSO solution and, in the case of p-tolylamine, also in ethanol.…”

“…9 Liang and co-workers lately synthesized 1,3-diaryl-5-spirohexahydropyrimidines via the proline-catalyzed one-pot condensation of anilines, formaldehyde, and cyclohexanones. 10 Dandia and co-workers obtained several fluorine-containing spirohexahydropyrimidine derivatives using the magnetically separable and easy recyclable heterogeneous CuFe2O4 nanocatalyst, 11 while Zeba and co-workers used a chitosan supported Dy(III) catalyst for the fairly green and energy-sustainable synthesis of hexahydropyrimidine derivatives. 12 An extensive overview of the recent asymmetric domino reactions has been presented by Pellissier.…”

Comparative study between TB-mBJ and GGA+U on magnetic and optical properties of CdFe2O4

“…Several work on different types of spinel were made, for example Nakashima et al [4] are evaluated the degree of cation disordering in spinel Zinc ferrite ZnFe 2 O 4 thin film, using a first principles method, they performed the theoretical simulations of X-ray Absorption Fine Structure (EXAFS) and X-ray Absorption Near Edge Structure (XANES) spectra at the Zn K edge and they concluded that about 60% (x=0.6) of Zn 2+ ions reside on the B sites in the ZnFe 2 O 4 thin film. The structural evolution and magnetic properties of nanostructured copper ferrite, CuFe 2 O 4 ,and Nickel ferrite NiFe 2 O 4 have been investigated also, by X-Ray diffraction as cited in [5], [6]. They are used as a catalyst [7] and humidity sensor [8].…”