Fe₃O₄@SiO₂-PTMS-Guanidine-SA nanoparticles used as an effective catalyst for the synthesis of N-substituted pyrroles. Pyrroles were synthesized from the reaction between primary amine derivatives and 2,5-hexanedione with high to excellent yields under mild reaction conditions. After completion of the reaction, Fe₃O₄@SiO₂-PTMS-Guanidine-SA magnetic nanoparticles could be recovered easily from the reaction mixture by an external magnet and reused. This catalyst was characterized by FT-IR spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, thermogravimetric analysis and vibrating-sample magnetometry techniques.

中文翻译：

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Fe 3 O 4 @SiO 2 -PTMS-胍-SA纳米颗粒作为合成N-取代吡咯的有效且可重复使用的催化剂

Fe ₃ O ₄ @SiO ₂ -PTMS-胍-SA纳米颗粒用作合成N-取代的吡咯的有效催化剂。由伯胺衍生物与2,5-己二酮之间的反应在温和的反应条件下以高至优异的产率合成了吡咯。反应完成后，可以容易地通过外部磁体从反应混合物中回收Fe ₃ O ₄ @SiO ₂ -PTMS-胍-SA磁性纳米颗粒，并重复使用。该催化剂通过FT-IR光谱，扫描电子显微镜，能量色散X射线光谱，X射线衍射，热重分析和振动样品磁力分析技术表征。