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  • 1. Lundberg, Helena
    et al.
    Tinnis, Fredrik
    Adolfsson, Hans
    Umeå University, Faculty of Science and Technology, Department of Chemistry.
    Zirconium catalyzed amide formation without water scavenging2019In: Applied organometallic chemistry, ISSN 0268-2605, E-ISSN 1099-0739Article in journal (Refereed)
    Abstract [en]

    A scalable homogeneous metal‐catalyzed protocol for direct amidation of carboxylic acids is presented. The use of 2–10 mol% of the commercially available Zr(Cp)2(OTf)2·THF results in high yields of amides at moderate temperature, using an operationally convenient reaction protocol that circumvents the use of water scavenging techniques.

  • 2. Masoud, Taheri
    et al.
    Mehran, Ghiaci
    Shchukarev, Andrey
    Umeå University, Faculty of Science and Technology, Department of Chemistry.
    A comparison between two Pd‐Ni catalysts supported on two different supports toward Suzuki‐Miyaura coupling reaction2018In: Applied organometallic chemistry, ISSN 0268-2605, E-ISSN 1099-0739, Vol. 32, no 5, article id e4338Article in journal (Refereed)
    Abstract [en]

    When a single metal fails to promote an efficient Suzuki?Miyaura coupling reaction at ambient temperature, the synergistic cooperation of two distinct metals might improve the reaction. To examine the synergistic effect of palladium and nickel for catalyzing Suzuki coupling reaction, g?C3N4 supported metal nanoparticles of PdO, NiO and Pd?PdO?NiO were prepared, characterized and their catalytic activities evaluated over different aryl halides at room temperature and 78 °C. The morphological characterization of Pd?PdO?NiO/g?C3N4 demonstrated that the bimetallic particles were uniformly dispersed over the g?C3N4 layers with diameters ranging from 3.5?7.7 nm. XPS analysis showed that nanoparticles of Pd?PdO?NiO consisted of Pd(II), Pd(0) and Ni(II) sites. The experiments performed on the catalytic activity of Pd?PdO?NiO/g?C3N4 showed that the prepared catalyst demonstrated an efficient activity without using toxic solvents.

  • 3. Ohlin, C. André
    et al.
    Beni, Zoltan
    Laurenczy, Gábor
    Ruiz, Nuria
    Masdeu-Bulto, Anna M.
    Heterogeneous dehalogenation of arylhalides in the presence of ionic liquids2007In: Applied organometallic chemistry, ISSN 0268-2605, E-ISSN 1099-0739, Vol. 21, no 3, p. 156-160Article in journal (Refereed)
    Abstract [en]

    Dehydrohalogenation of haloaromatics in ionic liquids derived from ethylmethylimidazolium or similar salts has been performed using Pd-C, Pd(OAc)(2) and other catalysts using formate salts as a hydrogen source. In the ionic liquid [emim][BF4], chlorobenzene was dehalogenated by up to 40%, bromobenzene up to 25% and iodobenzene up to 41% in 2 h. Reactions in the absence of the ionic liquid were also performed.

  • 4. Taheri, Masoud
    et al.
    Ghiaci, Mehran
    Moheb, Ahmad
    Shchukarev, Andrey
    Umeå University, Faculty of Science and Technology, Department of Chemistry.
    Organic–inorganic hybrid of anchored dicationic ionic liquid on Al-MCM-41-phosphovanadomolybdate toward selective oxidation of benzene to phenol2019In: Applied organometallic chemistry, ISSN 0268-2605, E-ISSN 1099-0739, Vol. 33, no 8, article id e5012Article in journal (Refereed)
    Abstract [en]

    A phosphovanadomolybdate hybridized with an anchored dicationic ionic liquid on Al-MCM-41 was prepared through the anion exchange and characterized by 1H and 13C NMR, FTIR, UV?Vis, XRD, XPS, TGA, TEM, FESEM, ICP-OES and BET techniques. The obtained data demonstrated that the composite is a porous material with the high surface area and also having a large pore volume which are 405 m2 g?1 and 0.616 cm3 g?1 respectively. The prepared composite has shown an acceptable catalytic activity for converting benzene selectively to phenol with hydrogen peroxide as eco-friendly oxidant. Under the optimized reaction conditions, the hybrid catalyst resulted in phenol yield of 14.8% with 100% selectivity and a TOF value of 20.0 h?1. The catalyst also revealed a desired recovery and reusability. The efficient performance of the composite is related to the textural and polyoxometalate properties.

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