Enhanced catalytic activity of H-β zeolite and MCM-41 in the cyclopentadiene Diels-Alder reactions

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  • Imai Tomoyuki
    Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
  • Ono Fumiyasu
    Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
  • Tanaka Junji
    Institute for Materials Chemistry and Engineering, CREST of Japan Science and Technology Agency
  • Sano Tsuneji
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University
  • Kanemasa Shuji
    Institute for Materials Chemistry and Engineering, CREST of Japan Science and Technology Agency

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  • Enhanced catalytic activity of H v zeolite and MCM 41 in the cyclopentadiene Diels Alder reactions

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Abstract

The Diels-Alder cycloaddition reactions between cyclopentadiene and methacrolein are effectively catalyzed with the aluminum-modified mesoporous silica MCM-41 having a variety of metal cations in the pore such as Zn-,Co-,Ni- and La-MCM-41.The β zeolite (H-β)having protons in the pore shows a dramatically high catalytic activity in the same reaction to give a quantitative yield of cycloadducts at 0℃ in less than l h, and the dealuminated β zeolite is also a highly reactive catalyst.The Diels-Alder reactions of cyclopentadiene with 3-buten-2-one and 2-ethylacrolein are also activated with the H-β and Ni-MCM-41

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