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<p>The simple extrusion method used to combine metakaolin (MK) with aminoethyl-3-aminopropyltriethoxysilane (AEAPTES) to create composite (MK/AEAPTES) is described in this article. Owing to amine group inherent on MK, it exhibited a basic nature. The novel basic catalyst is used for the synthesis of pyrazolyl phosphonates by Michael-addition reaction. Significant product yields, environmental friendliness, rapid reaction durations, broad range of substrate compatibility, and lack of hazardous solvent requirement make these reactions remarkable. Furthermore, there is no appreciable decrease in activity subsequently five recycles of the catalyst and catalyst separation using a straightforward filtration technique without any extraction. The synthesized derivatives were characterized by <sup>1</sup>H, <sup>13</sup>C NMR, and <sup>31</sup>P NMR &amp; FT-IR analysis. Synthesized composite is analyzed by FT-IR, XRD, and SEM–EDX, investigation is compared with MK. The recycled catalyst is also checked by FT-IR, XRD, and SEM–EDX analysis.</p>

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Synthesis of pyrazolyl phosphonates by using amine-functionalized metakaolin

  • 期刊论文

  • 发表日期：

    2025年1月2日

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  • Kasaram Roja,
  • Reddi Mohan Naidu Kalla,
  • Araveeti Eswar Reddy,
  • D K Venkata Ramana,
  • Tahani Mazyad Almutairi,
  • Jaewoong Lee

摘要

The simple extrusion method used to combine metakaolin (MK) with aminoethyl-3-aminopropyltriethoxysilane (AEAPTES) to create composite (MK/AEAPTES) is described in this article. Owing to amine group inherent on MK, it exhibited a basic nature. The novel basic catalyst is used for the synthesis of pyrazolyl phosphonates by Michael-addition reaction. Significant product yields, environmental friendliness, rapid reaction durations, broad range of substrate compatibility, and lack of hazardous solvent requirement make these reactions remarkable. Furthermore, there is no appreciable decrease in activity subsequently five recycles of the catalyst and catalyst separation using a straightforward filtration technique without any extraction. The synthesized derivatives were characterized by 1H, 13C NMR, and 31P NMR & FT-IR analysis. Synthesized composite is analyzed by FT-IR, XRD, and SEM–EDX, investigation is compared with MK. The recycled catalyst is also checked by FT-IR, XRD, and SEM–EDX analysis.