1 Ocak 2020 Dergi makalesi Açık Erişim

Gok, Yasar; Aykut, Irem Tutkum; Gok, Halil Zeki

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        "affiliation": "Burdur Mehmet Akif Ersoy Univ, Bucak Fac Technol, Dept Biomed Engn, TR-15300 Bucak, Burdur, Turkey", 
        "name": "Gok, Yasar"
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      {
        "affiliation": "Burdur Mehmet Akif Ersoy Univ, Bucak Fac Technol, Dept Biomed Engn, TR-15300 Bucak, Burdur, Turkey", 
        "name": "Aykut, Irem Tutkum"
      }, 
      {
        "affiliation": "Burdur Mehmet Akif Ersoy Univ, Bucak Fac Technol, Dept Biomed Engn, TR-15300 Bucak, Burdur, Turkey", 
        "name": "Gok, Halil Zeki"
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    "description": "The main objective of this study is to develop readily accessible and recyclable solid catalysts for enantioselective reactions. To achieve this, magnetic MCM-41 and non-magnetic SBA-15 mesoporous supports were prepared, then mesoporous silica supported chiral urea-amine bifunctional catalysts were synthesized by grafting of chiral urea-amine ligand onto SBA-15 and magnetic MCM-41. The magnetic and non-magnetic supports and so-prepared solid catalysts were characterized by using different methods such as N(2)sorption measurements, Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscope-energy dispersive X-ray analysis (FESEM-EDX), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Results showed that (1R, 2R) or (1S, 2S)-1,2-diphenylethane-1,2-diamine was successively immobilized onto magnetic MCM-41 and SBA-15 pores. The heterogeneous chiral solid catalysts and their homogenous counterparts exhibited high activities both enantioselective transfer hydrogenation reaction (up to 99% conversion and 65%ee) and enantioselective Michael reaction (up to 98% conversion and 26%ee). Moreover, the SBA-15 supported solid catalysts were separated from the reaction mixture by simple filtration, whereas the magnetic MCM-41 supported solid catalysts were separated by simple magnetic decantation and reused in three consecutive catalytic experiments.", 
    "doi": "10.1002/aoc.6015", 
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      "issue": "12", 
      "title": "APPLIED ORGANOMETALLIC CHEMISTRY", 
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    "publication_date": "2020-01-01", 
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    "title": "Readily accessible mesoporous silica nanoparticles supported chiral urea-amine bifunctional catalysts for enantioselective reactions"
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