Magnetic nickel ferrite nanoparticles as an efficient catalyst for the preparation of polyhydroquinoline derivatives under microwave irradiation in solvent-free conditions

Ahankar, Hamideh; Ramazani, Ali; Joo, Sang Woo

doi:10.1007/s11164-015-2163-6

Cited by 51 publications

(16 citation statements)

References 51 publications

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“…The gel was combusted by hold on a hot plate (200 °C) to release large amounts of gases, such as CO 2 , H 2 O, and N 2 . A dark brown ferrite powder was washed three times with distilled water and collected using an external magnetic field …”

Section: Methodsmentioning

confidence: 99%

A Laccase Heterogeneous Magnetic Fibrous Silica‐Based Biocatalyst for Green and One‐Pot Cascade Synthesis of Chromene Derivatives

et al. 2019

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Green cascade approaches, which utilize sustainable and recyclable heterogeneous biocatalysts, can be used in the catalysis of multicomponent organic reactions to synthesize biologically important substances. Three magnetic nanoparticles, iron (II, III) oxide, cobalt ferrite, and nickel ferrite, were prepared by co‐precipitation and functionalized with fibrous silica (KCC‐1), and characterized by scanning electron microscopy (SEM), X‐ray diffraction (XRD), and vibrating sample magnetometry (VSM). Laccase immobilized on CoFe2O4‐KCC‐1 was used as a heterogeneous biocatalyst for green and one‐pot cascade synthesis of 2‐amino‐5‐oxo‐4‐aryl‐4H,5H‐pyrano[3,2‐c]chromene‐3‐carbonitriles. The reaction was performed in the presence of 2,2,6,6‐tetramethylpiperidine‐1‐oxyl (TEMPO) as a synthetic redox mediator. The optimum reaction conditions were found to be as immobilized laccase (100 mg, 95 U) and TEMPO (2 mol‐%) in a 100 mm sodium citrate buffer (pH 4.5), 40 °C, and incubation time 17 h. About 80 % of initial activity of the immobilized laccase was retained after 15 independent runs.

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Section: Methodsmentioning

confidence: 99%

A Laccase Heterogeneous Magnetic Fibrous Silica‐Based Biocatalyst for Green and One‐Pot Cascade Synthesis of Chromene Derivatives

et al. 2019

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“…One year later, Ramazani and his co‐workers have developed an efficient protocol for the synthesis of polyhydroquinoline using magnetic nickel ferrite nanoparticles (NiFe 2 O 4 MNPs) as a catalyst . The structure of the magnetic nickel ferrite nanoparticles was confirmed by a series of spectroscopic techniques such as FT‐IR, SEM, TEM and XRD.…”

Section: Magnetically Recoverable Nanocatalysts In Synthesis Of Polyhmentioning

confidence: 99%

Magnetically Recoverable Catalysts: Catalysis in Synthesis of Polyhydroquinolines

Kazemi

Mohammadi

2019

Applied Organom Chemis

159

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Molecules that contain polyhydroquinoline structural scaffolds are N‐containing heterocycles which are of great interest to organic chemists and biologists. Polyhydroquinoline structural scaffolds which are known as calcium channel blockers have emerged as one of the most important class of drugs used for the treatment of cardiovascular and Alzheimer's diseases. Besides, recovery and reusability of catalysts are important issues to be discussed in modern catalysis research especially in organic synthesis. The concept of magnetically recoverable catalysts has been rapidly developed in recent times. Magnetic separation is an efficient strategy for the rapid separation of catalysts from the reaction medium. Also, an alternative to time‐, solvent‐, and energy‐consuming separation techniques. In this review, we focused on the fabrication, surface‐modification and characterization of nanomagnetic materials and their application, as magnetically recoverable catalysts, in the synthesis of polyhydroquinoline structural scaffolds.

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“…Nickel ferrite (NiFe 2 O 4 ) nanoparticles themselves have good catalytic property. It is useful to increase the contact surface between NiFe 2 O 4 and the substrate when they are loaded on GR sheets, further play better catalytic property . In this work, NiFe 2 O 4 nanoparticles loaded on GR sheets (NiFe 2 O 4 @GR) were prepared, and NiFe 2 O 4 @GR was first combined with a typical IFR system consisting of APP and PER to flame‐retarded PLA.…”

Section: Introductionmentioning

confidence: 99%

Effect of NiFe₂O₄@graphene in intumescent flame‐retarded poly(lactic acid) composites

et al. 2018

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NiFe2O4 nanoparticles loaded on graphene layers (NiFe2O4@GR) were prepared by the hydrothermal method, and they first combined with intumescent flame retardant (IFR) consisting of polyphosphate (APP) and pentaerythritol (PER) was used to prepare poly(lactic acid) (PLA) composites. Effect of NiFe2O4@GR and IFR on thermal stability and flame retardancy of PLA was investigated. Limit oxygen index (LOI) value of all the PLA composites increased, and the results of UL‐94 tests passed V0 ratings. With the presence of NiFe2O4@GR in intumescent flame‐retarded PLA composites, the initial degradation temperature had a big increase and char residue increased apparently. The ratio of graphite crystalline carbon was increased. The denser and more intumescent char layer was formed. In addition, NiFe2O4@GR had the reinforcing effect for PLA. Therefore, NiFe2O4@GR and IFR had a good synergistic effect in improving thermal stability and flame retardancy of PLA. POLYM. COMPOS., 40:652–656, 2019. © 2018 Society of Plastics Engineers

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Magnetic nickel ferrite nanoparticles as an efficient catalyst for the preparation of polyhydroquinoline derivatives under microwave irradiation in solvent-free conditions

Cited by 51 publications

References 51 publications

A Laccase Heterogeneous Magnetic Fibrous Silica‐Based Biocatalyst for Green and One‐Pot Cascade Synthesis of Chromene Derivatives

A Laccase Heterogeneous Magnetic Fibrous Silica‐Based Biocatalyst for Green and One‐Pot Cascade Synthesis of Chromene Derivatives

Magnetically Recoverable Catalysts: Catalysis in Synthesis of Polyhydroquinolines

Effect of NiFe₂O₄@graphene in intumescent flame‐retarded poly(lactic acid) composites

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Magnetic nickel ferrite nanoparticles as an efficient catalyst for the preparation of polyhydroquinoline derivatives under microwave irradiation in solvent-free conditions

Cited by 51 publications

References 51 publications

A Laccase Heterogeneous Magnetic Fibrous Silica‐Based Biocatalyst for Green and One‐Pot Cascade Synthesis of Chromene Derivatives

A Laccase Heterogeneous Magnetic Fibrous Silica‐Based Biocatalyst for Green and One‐Pot Cascade Synthesis of Chromene Derivatives

Magnetically Recoverable Catalysts: Catalysis in Synthesis of Polyhydroquinolines

Effect of NiFe2O4@graphene in intumescent flame‐retarded poly(lactic acid) composites

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Effect of NiFe₂O₄@graphene in intumescent flame‐retarded poly(lactic acid) composites