KF/Clinoptilolite, an effective solid base in Ullmann ether synthesis catalyzed by CuO nanoparticles

Khalilzadeh, Mohammad A.; Keipour, Hoda; Hosseini, Abolfazl; Zareyee, Daryoush

doi:10.1039/c3nj00834g

Cited by 55 publications

(37 citation statements)

References 56 publications

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“…On the other hand, rapid electron exchange between tetrahedral and octahedral sites enhances their catalytic activity. 32 Again, the reaction is restricted to aryl iodides and bromides and is carried out under harsh reaction conditions (at 120 o C using DMSO as solvent under nitrogen atmosphere and during 18-30 h) (Scheme 1c). 22,23 The main advantages reported for cobalt ferrite nanoparticles are their good mechanical and excellent chemical stabilities at higher temperature, strong anisotropy, moderate saturation magnetization and high coercivity.…”

Section: Introductionmentioning

confidence: 99%

Application of nickel ferrite and cobalt ferrite magnetic nanoparticles in C–O bond formation: a comparative study between their catalytic activities

2015

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Magnetic nanoparticles of nickel ferrite and cobalt ferrite were synthesized and their catalytic activity in the C-O bond formation reaction was compared. Both these spinel systems can catalyze the reaction between various types of aryl halides and phenol derivatives efficiently. The catalysts are easily removed from the reaction medium and can be reused further in several runs. All the reactions resulted in very good to excellent yields under optimized reaction conditions; however, reactions using nickel ferrite as catalyst were completed in relatively shorter reaction times. Also, analyses showed that reusability of the two catalytic systems approximately are comparable. Scheme 2. a) Recovery and reuse of nickel ferrite nanoparticles; and b) Recovery and reuse of cobalt ferrite nanoparticles.Reaction conditions: bromobenzene (1 mmol), phenol (1.1 mol), catalyst (5 mol %), K2CO3 (1.2 mmol), DMF (2 ml) and reaction stirred at 80 °C.

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Section: Introductionmentioning

confidence: 99%

Application of nickel ferrite and cobalt ferrite magnetic nanoparticles in C–O bond formation: a comparative study between their catalytic activities

2015

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“…26 Also, many diaryl ethers are important structural motifs found in a variety of naturally occurring medicinally active compounds including riccardin B, 27 tetramethylmagnolamine, 28 K-13, 29 piperazinomycin 30 and perrottetine. [32][33][34] On the other hand, many of palladium-reactions described the use of organic bromides, iodides and triates for the preparation of diaryl ethers. In the recent years, several improved protocols for O-arylation of phenols have been reported using palladium or copper as the catalyst.…”

Section: Introductionmentioning

confidence: 99%

Palladium nanoparticles supported on natural nanozeolite clinoptilolite as a catalyst for ligand and copper-free C–C and C–O cross coupling reactions in aqueous medium

et al. 2014

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In this article, Pd 0 -nanoparticles supported on natural nanozeolite clinoptilolite (CP) were successfully synthesized, and the catalytic activity of the nanocatalyst was investigated in C-C and C-O coupling reactions, namely the Sonogashira and Ullmann condensation reactions in an aqueous medium. The nanocatalyst was characterized by various techniques such as powder-XRD, BET, SEM, TEM, HRTEM, TEM-EDS, ICP-OES and XPS. From an electron microscopy (SEM) study it can be inferred that the particles are mostly spherical or of ellipsoidal shape and have diameters ranging from 25 to 80 nm. A HRTEM study reveals that Pd 0 -nanoparticles supported on nanozeolite CP have an average diameter of $10 nm. The supported palladium nanoparticles showed excellent catalytic activity in the synthesis of aryl alkynes and diaryl ethers in high yields. In addition, the nanocatalyst could be recycled and reused several times without significant loss of catalytic activity.

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“…Clinoptilolite (Cp) is one of those above mentioned zeolites with desirable features and advantages like being low cost, available and the most abundant natural zeolite. Further, it is in the chemical class of family of Heulandite (HEU-type), easily obtained from mines, appropriate as a sorbent due to its natural characteristics [28][29].…”

Section: Introductionmentioning

confidence: 99%

Decontamination of toxic chemical warfare sulfur mustard and nerve agent simulants by NiO NPs/Ag-clinoptilolite zeolite composite adsorbent

Sadeghi

Ghaedi

Yekta

et al. 2016

Journal of Environmental Chemical Engineering

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KF/Clinoptilolite, an effective solid base in Ullmann ether synthesis catalyzed by CuO nanoparticles

Cited by 55 publications

References 56 publications

Application of nickel ferrite and cobalt ferrite magnetic nanoparticles in C–O bond formation: a comparative study between their catalytic activities

Application of nickel ferrite and cobalt ferrite magnetic nanoparticles in C–O bond formation: a comparative study between their catalytic activities

Palladium nanoparticles supported on natural nanozeolite clinoptilolite as a catalyst for ligand and copper-free C–C and C–O cross coupling reactions in aqueous medium

Decontamination of toxic chemical warfare sulfur mustard and nerve agent simulants by NiO NPs/Ag-clinoptilolite zeolite composite adsorbent

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