A simple and facile Heck-type arylation of alkenes with diaryliodonium salts using magnetically recoverable Pd-catalyst

Vaddula, Buchi Reddy; Saha, Amit; Leazer, John; Varma, Rajender S.

doi:10.1039/c2gc35673b

Cited by 108 publications

(52 citation statements)

References 57 publications

(5 reference statements)

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“…During the last few decades, various homogeneous, heterogeneous and organometallic systems with special ligands have been developed for the Heck cross‐coupling reaction . Most of them suffer from drawbacks such as tedious multistep synthesis and work‐up, air‐ and moisture‐sensitive ligands, expensive, unstable and toxic ligands such as phosphine, and use of various additives and harmful solvents . Also, a diverse array of organic and inorganic supports, such as polymers, carbon, clay, ordered silicates and zeolites, have been used as hosts for palladium nanoparticles in cross‐coupling reactions .…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10] Most of them suffer from drawbacks such as tedious multistep synthesis and work-up, air-and moisture-sensitive ligands, expensive, unstable and toxic ligands such as phosphine, and use of various additives and harmful solvents. [11,12] Also, a diverse array of organic and inorganic supports, such as polymers, carbon, clay, ordered silicates and zeolites, have been used as hosts for palladium nanoparticles in cross-coupling reactions. [13][14][15][16][17] Magnetic nanoparticles as a readily available and low-cost material with high surface area, high catalyst loading capacity and high stability have also been used.…”

Section: Introductionmentioning

confidence: 99%

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Threonine stabilizer‐controlled well‐dispersed small palladium nanoparticles on modified magnetic nanocatalyst for Heck cross‐coupling process in water

Sarvi

Gholizadeh

Izadyar

2018

Applied Organom Chemis

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We report the synthesis of magnetically separable Fe3O4@Silica‐Threonine‐Pd0 magnetic nanoparticles with a core–shell structure. After synthesis of Fe3O4@Silica, threonine as an efficient stabilizer/ligand was bonded to the surface of Fe3O4@Silica. Then, palladium nanoparticles were generated on the threonine‐modified catalyst. The threonine stabilizer helps to generate palladium nanoparticles of small size (less than 4 nm) with high dispersity and uniformity. Magnetically separable Fe3O4@Silica‐Threonine‐Pd0 nanocatalyst was fully characterized using various techniques. This nanocatalyst efficiently catalysed the Heck cross‐coupling reaction of a variety of substrates in water medium as a green, safe and inexpensive solvent at 80°C. The Fe3O4@Silica‐Threonine‐Pd0 catalyst was used for at least eight successful consecutive runs with palladium leaching of only 0.05%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Threonine stabilizer‐controlled well‐dispersed small palladium nanoparticles on modified magnetic nanocatalyst for Heck cross‐coupling process in water

Sarvi

Gholizadeh

Izadyar

2018

Applied Organom Chemis

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“…The separation can be performed, but it is time and energy consuming [163], often with environmental implications. In view of this complication, magnetically recoverable catalysts have attracted considerable attention due to their potential to combine catalytic properties and efficient materials' recovery, thus, minimizing the total cost [164][165][166][167][168][169][170][171] and help preserve the environment. Generally, the magnetically recoverable catalysts consisted of a magnetic part and a noble metal.…”

Section: Magnetically Recoverable Catalystsmentioning

confidence: 99%

Colloidal magnetic nanocrystal clusters: variable length-scale interaction mechanisms, synergetic functionalities and technological advantages

Κωστοπούλου

Lappas

2015

Nanotechnology Reviews

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Magnetic particles of optimized nanoscale dimensions can be utilized as building blocks to generate colloidal nanocrystal assemblies with controlled size, well-defined morphology, and tailored properties. Recent advances in the state-of-the-art surfactant-assisted approaches for the directed aggregation of inorganic nanocrystals into cluster-like entities are discussed, and the synthesis parameters that determine their geometrical arrangement are highlighted. This review pays attention to the enhanced physical properties of iron oxide nanoclusters, while it also points to their emerging collective magnetic response. The current progress in experiment and theory for evaluating the strength and the role of intra-and inter-cluster interactions is analyzed in view of the spatial arrangement of the component nanocrystals. Numerous approaches have been proposed for the critical role of dipole-dipole and exchange interactions in establishing the nature of the nanoclusters' cooperative magnetic behavior (be it ferromagnetic or spin-glass like). Finally, we point out why the purposeful engineering of the nanoclusters' magnetic characteristics, including their surface functionality, may facilitate their use in diverse technological sectors ranging from nanomedicine and photonics to catalysis.

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“…In this respect, magnetic recovery of the catalysts seems particularly promising [33]. Magnetic catalyst recovery generates more environmentally friendly processes, cheaper products, and conserved energy for a range of processes [34][35][36][37]. In the majority of cases, catalytic complexes or nanoparticles (NPs) are placed on the surface of magnetic NPs [33,38,39], but for efficient magnetic separation, the NP aggregation is required [40,41].…”

Section: Introductionmentioning

confidence: 99%

Hydrogenation of bio-oil into higher alcohols over Ru/Fe3O4-SiO2 catalysts

Cherkasov

Jadvani

Mann

et al. 2017

Fuel Processing Technology

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Permanent WRAP URL:http://wrap.warwick.ac.uk/91922 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work by researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription. AbstractLiquid-phase hydrogenation of a solution of furfural, phenol and acetic acid has been studied in the 50-235 o C range over magnetic Ru/Fe3O4-SiO2 catalyst targeting the renewable production of second generation biofuels with minimum hydrogen consumption.Phenol was fully hydrogenated to cyclohexanol in the entire temperature range. Below 150 o C, furfural was mainly hydrogenated to tetrahydrofurfuryl alcohol while hydrogenolysis to cyclopentanol was the main reaction pathway above 200 o C. The hydrogenation rate was doubled in an acidic solution (pH=3) as compared to that at a pH 6. The spent catalyst was regenerated and reused in subsequent catalytic runs.

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A simple and facile Heck-type arylation of alkenes with diaryliodonium salts using magnetically recoverable Pd-catalyst

Cited by 108 publications

References 57 publications

Threonine stabilizer‐controlled well‐dispersed small palladium nanoparticles on modified magnetic nanocatalyst for Heck cross‐coupling process in water

Threonine stabilizer‐controlled well‐dispersed small palladium nanoparticles on modified magnetic nanocatalyst for Heck cross‐coupling process in water

Colloidal magnetic nanocrystal clusters: variable length-scale interaction mechanisms, synergetic functionalities and technological advantages

Hydrogenation of bio-oil into higher alcohols over Ru/Fe3O4-SiO2 catalysts

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