Catalytic application of zinc (II) bromide (ZnBr<sub>2</sub>) in organic synthesis

Ghobadi, Massoud; Qhazvini, Peiman Pourmoghaddam; Kazemi, Mosstafa

doi:10.1080/00397911.2020.1811873

Cited by 10 publications

(6 citation statements)

References 114 publications

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“…[13a] Zinc compounds are widely available and inexpensive. [15] In addition, ZnO as a Lewis-acid catalyst [16] and Zn 2 + could be introduced into the structure of the catalysts and adjust the balance of basic and acidic sites of catalysts. [17] U. Sachin Varma [18] reported that Zn 2 + doping into MgO also produces lattice distortion.…”

Section: Introductionmentioning

confidence: 99%

“…Zn 2+ has similar properties to Ni 2+ in terms of electronegativity, valence, and radius size [13a] . Zinc compounds are widely available and inexpensive [15] . In addition, ZnO as a Lewis‐acid catalyst [16] and Zn 2+ could be introduced into the structure of the catalysts and adjust the balance of basic and acidic sites of catalysts [17] .…”

Section: Introductionmentioning

confidence: 99%

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Zn_xMg_1‐xO Solid Solutions: Efficient Bifunctional Acid‐Base Catalyst for the synthesis of Methyl Ethyl Oxalate from Dimethyl Oxalate and Ethanol

et al. 2023

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ZnO‐MgO composite catalysts were prepared by the coprecipitation method and used for the synthesis of methyl ethyl oxalate (EMO) from dimethyl oxalate (DMO) and ethanol (EtOH). The results of the SEM, XRD, FT‐IR and XPS confirmed that Zn2+ ions were incorporated into the cubic MgO lattice to form the solid solution structure over ZnO‐MgO composites catalysts with 6–18 mol% ZnO. The ZnO‐MgO composite catalysts with a solid solution structure have a large specific surface area, high medium acidic density, and medium basic density according to the results of N2 adsorption‐desorption, pyridine‐IR (Py‐IR) and NH3/CO2 temperature‐programmed desorption (NH3‐TPD/CO2‐TPD). The ZnxMg1‐xO solid solution with 18 mol% ZnO‐MgO (Zn0.18Mg0.82O) catalyst showed the highest catalytic activity with 71.98 % conversion of DMO and 67.36 % selectivity to EMO (DMO: EtOH molar ratio=1 : 2, reaction time=20 min, reaction temperature=80 °C and catalyst amount=1.5 wt%). The high catalytic activity was attributed to the solid solution structure with high medium acidic density and medium basic density. The conversion of DMO showed a positive linear correlation with the medium acidic density and medium basic density according to the correlation between catalytic activity and acidity‐basicity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Zn_xMg_1‐xO Solid Solutions: Efficient Bifunctional Acid‐Base Catalyst for the synthesis of Methyl Ethyl Oxalate from Dimethyl Oxalate and Ethanol

et al. 2023

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“…Various research groups have studied the potential of zinc in catalysis for hydroamination reactions [184,185]. The first examples of alkene cyclohydroamination catalyzed…”

Section: Hydroaminationmentioning

confidence: 99%

“…Various research groups have studied the potential of zinc in catalysis for hydroamination reactions [184,185] [186]. Several modulations of the steric and electronic properties of the aminotroponimate skeleton were further attempted to improve the catalyst activity and stability [180,187,188].…”

Section: Hydroaminationmentioning

confidence: 99%

Earth-Abundant 3d Transition Metal Catalysts for Hydroalkoxylation and Hydroamination of Unactivated Alkenes

et al. 2021

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“…A powerful tool in achieving high–yielding and chemo–selective synthesis of complex products is found in multicomponent reactions [17,18] . Transition metal catalysts, especially in the synthesis of heterocycles through multicomponent reactions, have garnered significant attention [19] . Among the pantheon of transition metals, copper stands out as a preferred choice for orchestrating chemical reactions [20] .…”

Section: Introductionmentioning

confidence: 99%

One–Pot Three–Component Synthesis of 2,4,5–Triaryl Imidazoles using Fe3O4@BisImid−CuBr Nanocomposite as an Ecofriendly and Efficient Magnetically Reusable Catalyst

Al‐Dolaimy,

Alsalamy,

Abdullah Abbas

et al. 2024

ChemistrySelect

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Imidazoles are one of the keys of N‐heterocycle molecules that exist in the structure of many biomolecules. In this research project, we reported that Fe3O4@BisImid−CuBr nanocomposite is an attractive and efficient nanomagnetic catalyst to afford 2,4,5–triaryl imidazoles through reactions of 1,2–diketones and aldehydes in the presence of NH4OAc under ecofriendly conditions. The Fe3O4@BisImid−CuBr nanocomposite was readily fabricated by a simple method from available reagents and its structure was analyzed by spectroscopic techniques. SEM and TEM images affirmed the formation of particles in spherical shape and nanometer–size. Under this methodology, a diverse library of triaryl imidazoles were afforded with high yields in water. This synthetic methodology has significant features such as (a) high yields and high purity of the products (b) suitable reaction time (c) use of magnetic reusable nanocatalyst (d) high reusability of Fe3O4@BisImid−CuBr nanocatalyst and the performance of reactions in aqueous medium.

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Catalytic application of zinc (II) bromide (ZnBr₂) in organic synthesis

Cited by 10 publications

References 114 publications

Zn_xMg_1‐xO Solid Solutions: Efficient Bifunctional Acid‐Base Catalyst for the synthesis of Methyl Ethyl Oxalate from Dimethyl Oxalate and Ethanol

Zn_xMg_1‐xO Solid Solutions: Efficient Bifunctional Acid‐Base Catalyst for the synthesis of Methyl Ethyl Oxalate from Dimethyl Oxalate and Ethanol

Earth-Abundant 3d Transition Metal Catalysts for Hydroalkoxylation and Hydroamination of Unactivated Alkenes

One–Pot Three–Component Synthesis of 2,4,5–Triaryl Imidazoles using Fe3O4@BisImid−CuBr Nanocomposite as an Ecofriendly and Efficient Magnetically Reusable Catalyst

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Catalytic application of zinc (II) bromide (ZnBr2) in organic synthesis

Cited by 10 publications

References 114 publications

ZnxMg1‐xO Solid Solutions: Efficient Bifunctional Acid‐Base Catalyst for the synthesis of Methyl Ethyl Oxalate from Dimethyl Oxalate and Ethanol

ZnxMg1‐xO Solid Solutions: Efficient Bifunctional Acid‐Base Catalyst for the synthesis of Methyl Ethyl Oxalate from Dimethyl Oxalate and Ethanol

Earth-Abundant 3d Transition Metal Catalysts for Hydroalkoxylation and Hydroamination of Unactivated Alkenes

One–Pot Three–Component Synthesis of 2,4,5–Triaryl Imidazoles using Fe3O4@BisImid−CuBr Nanocomposite as an Ecofriendly and Efficient Magnetically Reusable Catalyst

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Catalytic application of zinc (II) bromide (ZnBr₂) in organic synthesis

Zn_xMg_1‐xO Solid Solutions: Efficient Bifunctional Acid‐Base Catalyst for the synthesis of Methyl Ethyl Oxalate from Dimethyl Oxalate and Ethanol

Zn_xMg_1‐xO Solid Solutions: Efficient Bifunctional Acid‐Base Catalyst for the synthesis of Methyl Ethyl Oxalate from Dimethyl Oxalate and Ethanol