The presented study is the first report of the synthesis of terpyridines in the presence of a nanomagnetic catalyst instead of harmful reagents. Herein, Fe₃O₄@O₂PO₂(CH₂)₂NH₃⁺CF₃CO₂⁻ as a retrievable nanocatalyst with magnetic properties was applied for the multi-component reaction between acetylpyridine derivatives (2 or 3 or 4-isomer), aryl aldehydes and ammonium acetate under conventional heating conditions in the absence of any solvent. The derived terpyridines were obtained with acceptable yields and brief reaction times via a cooperative vinylogous anomeric based oxidation route. Fe₃O₄@O₂PO₂(CH₂)₂NH₃⁺CF₃CO₂⁻ showed a high capability for recovery and reuse in the mentioned reaction.

中文翻译：

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一种通过协同插烯异头氧化合成三联吡啶的简便方法

本研究是首次报道在纳米磁性催化剂而不是有害试剂存在下合成三联吡啶。在此，Fe ₃ O ₄ @O ₂ PO ₂ (CH ₂ ) ₂ NH ₃ ⁺ CF ₃ CO ₂ ⁻作为具有磁性的可回收纳米催化剂，应用于乙酰吡啶衍生物（2或3或4-异构体）之间的多组分反应)、芳基醛和乙酸铵在常规加热条件下，在没有任何溶剂的情况下。通过合作插烯异头氧化路线，以可接受的产率和短暂的反应时间获得了衍生的三联吡啶。Fe ₃ O ₄ @O ₂ PO ₂ (CH ₂ ) ₂ NH ₃ ⁺ CF ₃ CO ₂ ^-在上述反应中表现出较高的回收和再利用能力。