Tri-vanadium Substituted Dawson-type Heteropolytungstate Nanocomposite (g-C
 3
 N
 4
 /Fe
 3
 O
 4
 @P
 2
 W
 15
 V
 3
 ) as a Novel, Green, and Recyclable Nanomagnetic Catalyst in the Synthesis of Tetrahydrobenzo[b]Pyrans

Maleki, Behrooz; Jamshidi, Ali; Peiman, Sahar; Housaindokht, Mohammad Reza

doi:10.1080/10406638.2023.2184398

Cited by 17 publications

(4 citation statements)

References 67 publications

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“…The most remarkable attribute of MCRs is that almost all the parts and features of the reactants can be found in the newly formed product indicative of low by-product formation making them wonders of reaction design and efficiency 15 . The development of new MCRs, and improvement of known multi-component reactions are due to their outstanding advantages such as simple operation, high selectivity, high efficiency, high atom economy, reducing the generate of by-products and waste, cost-effectiveness, Saving the chemical materials, time, energy and solvent, eco-friendly nature 18 – 24 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Co-MOF@Ag2O nanocomposite and its application as a nano-organic catalyst for one-pot synthesis of pyrazolopyranopyrimidines

Hootifard,

Sheikhhosseini,

Ahmadi

et al. 2023

Sci Rep

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In this study, a Co-MOF was synthesized via a co-precipitation procedure and then used as support for stabilizing Ag ions and producing Co-MOF@Ag2O nanocomposite by microwave irradiation. The characterization of synthesized Co-MOF@Ag2O nanocomposite was performed by using different techniques such as field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray (EDX) analyses, X-ray diffraction (XRD), Thermogravimetric analysis (TGA), Brunauer–Emmett–Teller (BET) and Fourier-transform infrared (FT-IR). The prepared Co-MOF@Ag2O nanocomposite was applied as a heterogeneous nano-catalyst in the synthesis of pyrazolopyranopyrimidines in water at 50 °C via the one-pot multicomponent reaction of ethyl acetoacetate, hydrazine hydrate, aromatic aldehydes and barbituric acid derivatives. Through this straightforward and effective protocol, different tricyclic fused pyrazolopyranopyrimidines were synthesized at high yields, and short reaction times, through an uncomplicated work-up process with no by-product. The Co-MOF@Ag2O nanocomposite has been effectively recycled for four consecutive cycles without appreciable loss in its activity. Cost-effectiveness, no need for column chromatography, mild conditions, catalyst recyclability, and eco-friendly nature make it a promising candidate compared to other methods.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Co-MOF@Ag2O nanocomposite and its application as a nano-organic catalyst for one-pot synthesis of pyrazolopyranopyrimidines

Hootifard,

Sheikhhosseini,

Ahmadi

et al. 2023

Sci Rep

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“…Magnetic nanoparticles are a highly practical and valuable substrate for the attachment of homogeneous organic and inorganic containing catalysts 30,31 . They have exhibited promising potential in organic synthesis as a heterogeneous catalyst due to their easy separation and reusability 32–42 . The immobilization of photoactive species on the surface of magnetic nanomaterial provides high surface area leading to an increase in the catalytic performance 43,44 .…”

Section: Introductionmentioning

confidence: 99%

“…30,31 They have exhibited promising potential in organic synthesis as a heterogeneous catalyst due to their easy separation and reusability. [32][33][34][35][36][37][38][39][40][41][42] The immobilization of photoactive species on the surface of magnetic nanomaterial provides high surface area leading to an increase in the catalytic performance. 43,44 Therefore, magnetic titanium dioxide is a great candidate to design a nanostructured photocatalyst.…”

Section: Introductionmentioning

confidence: 99%

Photoinduced electron transfer reaction for synthesis of tetrahydroquinoline derivatives with conjugated structure using chlorophyll b‐modified magnetic titanium dioxide photocatalyst

Heidari,

Teimuri‐Mofrad,

Safa

2023

Applied Organom Chemis

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Photocatalytic conversion of organic compounds has recently emerged as a cost‐effective, safe, and easy‐to‐operate procedure to synthesize value‐added materials. In this study, the magnetic titanium dioxide‐based (Fe3O4/SiO2/TiO2) photocatalyst was designed to synthesize conjugated derivatives of tetrahydroquinoline through a photoinduced electron transfer (PET) reaction. Chlorophyll b was immobilized on the surface of magnetic titanium dioxide, as a natural visible‐light‐sensitive compound using 3‐aminopropyltriethoxysilane (APTES) as a coupling agent containing terminal amine (Fe3O4/SiO2/TiO2‐NH2‐Chb) to improve light harvesting ability. Fourier transform infrared (FT‐IR), powder X‐ray diffraction (PXRD), thermogravimetric analysis (TGA), energy‐dispersive X‐ray spectrometer (EDS), and vibrating sample magnetometer (VSM) results confirmed the successful synthesis of Fe3O4/SiO2/TiO2‐NH2‐Chb. Scanning electron microscope (SEM) and transmission electron microscope (TEM) images displayed the preserved spherical morphology of Fe3O4/SiO2/TiO2‐NH2‐Chb. Chlorophyll b‐modified magnetic titanium dioxide was highly active under visible‐light irradiation toward the cyclization of (E)‐3‐[4‐(dimethylamino)phenyl)]‐1‐arylprop‐2‐en‐1‐one with 1‐aryl‐1H‐pyrrole‐2,5‐dione to achieve new tetrahydroquinoline derivatives with conjugated structure in high yields at ambient temperature, in air. The incorporation of chlorophyll b in the photocatalyst plays an important role in the photocatalytic mechanism, facilitating photoinduced electron transfer to the conduction band of TiO2. Moreover, the magnetic property enabled easy recovery of the photocatalyst and improved its reusability up to three runs. The characteristics of tetrahydroquinoline derivatives were studied by FT‐IR, CHN, 1H NMR, and 13C NMR analyses.

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“…Magnetic catalysts combined with ionic liquids represent an interesting and promising approach in the field of catalysis 25 . Applications of magnetic catalysts combined with ionic liquids can be found in various fields, including organic synthesis 26 , 27 , biomass conversion 28 , 29 , and energy-related processes 30 , 31 . Researchers continue to explore and develop new catalytic systems to harness the advantages offered by this combination, aiming to achieve more efficient and sustainable chemical transformations 32 – 35 .…”

Section: Introductionmentioning

confidence: 99%

Magnet-responsive choline carbomer ionogels as a versatile and recyclable catalyst for one-pot synthesis of benzopyran in water

Shojaee,

Azizi,

Mirjafary

et al. 2023

Sci Rep

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Ionogels are gaining popularity as a potential replacement for volatile organic solvents in various processes, such as catalysts, electrochemistry, spectroscopy, and medicinal chemistry, due to their low toxicity, high thermal stability, and good solubility. Magnet-responsive ion gels with high magnetic susceptibility are promising and can be used as catalysts, sensors, and MRI contrast agents. Herein, we fabricated simple and novel magnet choline carbomer ionogels using a precipitation-deposition method with carbomers and choline hydroxide. The morphology and structure of the resulting ionogels were analyzed using various characterization techniques, including FTIR, EDX, TGA, and SEM spectroscopy. These magnet ionogels were effective catalysts for a one-pot, three-component synthesis of benzopyran derivatives, providing mild reaction conditions, environmental friendliness, and good to excellent (78–96%) yields within a short reaction time (1–2 h). Additionally, the magnet ionogels were easily recyclable, and they could be reused up to five times without catalytic deactivation.

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Tri-vanadium Substituted Dawson-type Heteropolytungstate Nanocomposite (g-C ₃ N ₄ /Fe ₃ O ₄ @P ₂ W ₁₅ V ₃ ) as a Novel, Green, and Recyclable Nanomagnetic Catalyst in the Synthesis of Tetrahydrobenzo[b]Pyrans

Cited by 17 publications

References 67 publications

Synthesis and characterization of Co-MOF@Ag2O nanocomposite and its application as a nano-organic catalyst for one-pot synthesis of pyrazolopyranopyrimidines

Synthesis and characterization of Co-MOF@Ag2O nanocomposite and its application as a nano-organic catalyst for one-pot synthesis of pyrazolopyranopyrimidines

Photoinduced electron transfer reaction for synthesis of tetrahydroquinoline derivatives with conjugated structure using chlorophyll b‐modified magnetic titanium dioxide photocatalyst

Magnet-responsive choline carbomer ionogels as a versatile and recyclable catalyst for one-pot synthesis of benzopyran in water

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Tri-vanadium Substituted Dawson-type Heteropolytungstate Nanocomposite (g-C 3 N 4 /Fe 3 O 4 @P 2 W 15 V 3 ) as a Novel, Green, and Recyclable Nanomagnetic Catalyst in the Synthesis of Tetrahydrobenzo[b]Pyrans

Cited by 17 publications

References 67 publications

Synthesis and characterization of Co-MOF@Ag2O nanocomposite and its application as a nano-organic catalyst for one-pot synthesis of pyrazolopyranopyrimidines

Synthesis and characterization of Co-MOF@Ag2O nanocomposite and its application as a nano-organic catalyst for one-pot synthesis of pyrazolopyranopyrimidines

Photoinduced electron transfer reaction for synthesis of tetrahydroquinoline derivatives with conjugated structure using chlorophyll b‐modified magnetic titanium dioxide photocatalyst

Magnet-responsive choline carbomer ionogels as a versatile and recyclable catalyst for one-pot synthesis of benzopyran in water

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Resources

About

Tri-vanadium Substituted Dawson-type Heteropolytungstate Nanocomposite (g-C ₃ N ₄ /Fe ₃ O ₄ @P ₂ W ₁₅ V ₃ ) as a Novel, Green, and Recyclable Nanomagnetic Catalyst in the Synthesis of Tetrahydrobenzo[b]Pyrans