Schiff base complexes of Ni, Co, Cr, Cd and Zn supported on magnetic nanoparticles: As efficient and recyclable catalysts for the oxidation of sulfides and oxidative coupling of thiols

Ghorbani‐Choghamarani, Arash; Darvishnejad, Zahra; Tahmasbi, Bahman

doi:10.1016/j.ica.2015.07.004

Cited by 81 publications

(62 citation statements)

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“…[13][14][15][16] Schiff bases, named after Hugo Schiff, are versatile compounds synthesized from condensation of amino compounds with carbonyl compounds. [18] These complexes have found wide applications as excellent homogeneous and heterogeneous catalysts in various organic reactions such as polymerization reactions, [19] oxidation of organic compounds, [20] hydrosilylation of ketones, [21] Diels-Alder reactions, [22] etc. They also exhibit a broad range of biological activities.…”

Section: Introductionmentioning

confidence: 99%

Immobilized Cu(II) Schiff base complex supported on Fe₃O₄ magnetic nanoparticles: A highly efficient and reusable new catalyst for the synthesis of pyranopyridine derivatives

Azarifar

Mahmoudi‐GomYek

Ghaemi

2018

Applied Organom Chemis

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A new copper(II) Schiff base complex immobilized on silica-coated nanomagnetic Fe 3 O 4 was synthesized from acetylacetonate (acac) and 2aminothiophenol (ATP). The newly synthesized nanocatalyst, Fe 3 O 4 @SiO 2acac-2ATP-Cu(II), was structurally characterized using several analytical techniques. The catalytic activity of the Fe 3 O 4 @SiO 2 -acac-2ATP-Cu(II) nanoparticles was investigated for the synthesis of pyrano[2,3-b]pyridine derivatives from the one-pot three-component reaction of aldehydes, malononitrile and 3-cyano-6-hydroxy-4-methylpyridin-2(1H)-one. A high catalytic performance was exhibited by this nanocatalyst under solvent-free conditions and excellent yields of the products were achieved in reasonably short reaction times. The nanoparticles could be easily separated from the reaction mixture simply by magnetic decantation and reused for several consecutive runs without significant loss of catalytic activity. KEYWORDS acac-2ATP Schiff base-Cu(II) complex, Fe 3 O 4 -immobilized Schiff base copper complex, nanomagnetic Fe 3 O 4 , nanoparticle, pyranopyridine

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Section: Introductionmentioning

confidence: 99%

Immobilized Cu(II) Schiff base complex supported on Fe₃O₄ magnetic nanoparticles: A highly efficient and reusable new catalyst for the synthesis of pyranopyridine derivatives

Azarifar

Mahmoudi‐GomYek

Ghaemi

2018

Applied Organom Chemis

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“…In order to prepare Ni-SMTU@boehmite, initially the boehmite nanoparticles was prepared according to new reported procedure [37], then modified using (3chloropropyl)trimethoxysilane (CPTES). In the next step, the terminal Cl was successfully replaced by S-methylisothiourea hemisulfate salt (SMTU) through substation reaction, which SMTU has been supported on boehmite nanoparticles (SMTU@boehmite).…”

Section: Catalyst Preparationmentioning

confidence: 99%

“…Also the size and morphology of Ni-SMTU@boehmite was studied by TEM technique. As shown in spectrum a, strong bands at 3086 and 3308 cm −1 are attributed to the symmetrical and asymmetrical modes of the hydroxyl groups on the surface of boehmite nanoparticles [37,38]. In order to show the presence elements in catalyst, the EDS analysis of Ni-SMTU@boehmite was performed.…”

Section: Catalyst Characterizationsmentioning

confidence: 99%

Ni–S-methylisothiourea complexes supported on boehmite nanoparticles and their application in the synthesis of 5-substituted tetrazoles

Ghorbani‐Choghamarani

Moradi

Tahmasbi

2016

RSC Adv.

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ARTICLE This journal isBoehmite nanoparticles is an aluminum oxide hydroxide (ɤ-AlOOH) particles, which were prepared by simple and inexpensive procedure and immobilized further with nickel Smethylisothiourea complex (Ni-SMTU@boehmite), and characterized by FT-IR spectroscopy, TGA, XRD, ICP-OES, EDS, SEM and TEM techniques. Finally, we investigated the catalytic activity of Ni-SMTU@boehmite as a new, heterogeneous, stable and high reusable nanocatalyst for the synthesis of 5-substituted 1H-tetrazole derivatives in PEG-400 as green solvent. This catalyst was recovered by simple filtration and reused several times without significant loss of its catalytic efficiency or nickel leaching. Heterogeneity of this catalyst has been studied using hot filtration and ICP-OES technique. ARTICLE This journal is ARTICLEThis journal is

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“…So, many procedures involving different catalysts and various oxidants have been presented to carry out these transformations. There is a continuing requirement for procedures that are easy, mild, effective and especially selective . Due to the environmentally friendly character of hydrogen peroxide (H 2 O 2 ), its effective oxygen content and low cost, oxidation using H 2 O 2 as an oxidant is preferred .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of indium and thallium immobilized on isonicotinamide‐functionalized mesoporous MCM‐41: Two novel and highly active heterogeneous catalysts for selective oxidation of sulfides and thiols to their corresponding sulfoxides and disulfides

Molaei

Ghadermazi

2019

Applied Organom Chemis

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Two highly ordered isonicotinamide (INA)‐functionalized mesoporous MCM‐41 materials supporting indium and thallium (MCM‐41‐INA‐In and MCM‐41‐INA‐Tl) have been developed using a covalent grafting method. A surface functionalization method has been applied to prepare Cl‐modified mesoporous MCM‐41 material. Condensation of this Cl‐functionalized MCM‐41 with INA leads to the formation of MCM‐41‐INA. The reaction of MCM‐41‐INA with In(NO3)3 or Tl(NO3)3 leads to the formation of MCM‐41‐INA‐In and MCM‐41‐INA‐Tl catalysts. The resulting materials were characterized using various techniques. These MCM‐41‐INA‐In and MCM‐41‐INA‐Tl catalysts show excellent catalytic performance in the selective oxidation of sulfides and thiols to their corresponding sulfoxides and disulfides. Finally, it is found that the anchored indium and thallium do not leach out from the surface of the mesoporous catalysts during reaction and the catalysts can be reused for seven repeat reaction runs without considerable loss of catalytic performance.

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Schiff base complexes of Ni, Co, Cr, Cd and Zn supported on magnetic nanoparticles: As efficient and recyclable catalysts for the oxidation of sulfides and oxidative coupling of thiols

Cited by 81 publications

References 31 publications

Immobilized Cu(II) Schiff base complex supported on Fe₃O₄ magnetic nanoparticles: A highly efficient and reusable new catalyst for the synthesis of pyranopyridine derivatives

Immobilized Cu(II) Schiff base complex supported on Fe₃O₄ magnetic nanoparticles: A highly efficient and reusable new catalyst for the synthesis of pyranopyridine derivatives

Ni–S-methylisothiourea complexes supported on boehmite nanoparticles and their application in the synthesis of 5-substituted tetrazoles

Synthesis and characterization of indium and thallium immobilized on isonicotinamide‐functionalized mesoporous MCM‐41: Two novel and highly active heterogeneous catalysts for selective oxidation of sulfides and thiols to their corresponding sulfoxides and disulfides

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Schiff base complexes of Ni, Co, Cr, Cd and Zn supported on magnetic nanoparticles: As efficient and recyclable catalysts for the oxidation of sulfides and oxidative coupling of thiols

Cited by 81 publications

References 31 publications

Immobilized Cu(II) Schiff base complex supported on Fe3O4 magnetic nanoparticles: A highly efficient and reusable new catalyst for the synthesis of pyranopyridine derivatives

Immobilized Cu(II) Schiff base complex supported on Fe3O4 magnetic nanoparticles: A highly efficient and reusable new catalyst for the synthesis of pyranopyridine derivatives

Ni–S-methylisothiourea complexes supported on boehmite nanoparticles and their application in the synthesis of 5-substituted tetrazoles

Synthesis and characterization of indium and thallium immobilized on isonicotinamide‐functionalized mesoporous MCM‐41: Two novel and highly active heterogeneous catalysts for selective oxidation of sulfides and thiols to their corresponding sulfoxides and disulfides

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Immobilized Cu(II) Schiff base complex supported on Fe₃O₄ magnetic nanoparticles: A highly efficient and reusable new catalyst for the synthesis of pyranopyridine derivatives

Immobilized Cu(II) Schiff base complex supported on Fe₃O₄ magnetic nanoparticles: A highly efficient and reusable new catalyst for the synthesis of pyranopyridine derivatives