Synthesis of Chalcone and Flavanone Derivatives from Condensation of 2’-Hydroxyacetophenones and Benzaldehyde over Basic <i>β</i>-Zeolites

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  • Yamashiro Takashi
    Dept. of Engineering in Applied Chemistry, Faculty of Engineering and Resource Science, Akita University
  • Narita Kodai
    Dept. of Engineering in Applied Chemistry, Faculty of Engineering and Resource Science, Akita University
  • Sato Kanji
    Dept. of Engineering in Applied Chemistry, Faculty of Engineering and Resource Science, Akita University
  • Nomura Masayuki
    Dept. of Engineering in Applied Chemistry, Faculty of Engineering and Resource Science, Akita University
  • Nakata Shinichi
    Dept. of Engineering in Applied Chemistry, Faculty of Engineering and Resource Science, Akita University

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Other Title
  • 塩基性<i>β</i>-ゼオライトを用いた2’-ヒドロキシアセトフェノン類とベンズアルデヒドの縮合によるカルコン・フラバノン誘導体の合成
  • Synthesis of chalcone and flavanone derivatives from condensation of 2'-hydroxyacetophenones and benzaldehyde over basic β-zeolites
  • Synthesis of chalcone and flavanone derivatives from condensation of 2 hydroxyacetophenones and benzaldehyde over basic v zeolites

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Description

The basic strength of alkali metal ion-exchanged β-zeolites was assessed based on the extent of Knoevenagel reaction using malonic acid derivatives and benzaldehyde. Preparation of chalcone and flavanone derivatives from the condensation of 2’-hydroxyacetophenones and benzaldehyde were carried out over the zeolites. The conversions of chalcone and flavanone derivatives and the selectivity of flavanone derivatives increased with the basic strength of the catalyst. A cyclization from chalcone to flavanone was controlled with intermolecular hydrogen bond strength of chalcone derivatives.

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