In this study, an efficient and novel procedure has been reported for loading sulfanilic acid on the surface of magnetite Fe₃O₄ nanoparticles using tris(hydroxymethyl) aminomethane and 1,2-dichloroethane. Next, the synthesized nanocatalyst was fully characterized using FT-IR, XRD, TGA, VSM, SEM, and TEM. The results show that the synthesis of magnetic nanocatalyst has been successful with a range of 2–20 nm in size. Finally, the catalytic activity of this superparamagnetic nanocatalyst was explored for the synthesis of tetrahydrobenzo[b]pyran and 2-amino-5-oxo-4,5-dihydropyrano[3,2-c]chromene-3-carbonitrile derivatives. The synthesized nanocatalyst has advantages such as non-toxicity, short reaction time, easy workup, cleaner reaction profiles under mild reaction conditions.

在这项研究中，已经报道了使用三（羟甲基）氨基甲烷和1,2-二氯乙烷将磺胺酸加载到磁铁矿Fe ₃ O ₄纳米颗粒表面的有效而新颖的方法。接下来，使用FT-IR，XRD，TGA，VSM，SEM和TEM对合成的纳米催化剂进行了全面表征。结果表明，磁性纳米催化剂的合成已成功完成，粒径范围为2–20 nm。最后，探索了该超顺磁性纳米催化剂的催化活性，用于合成四氢苯并[ b ]吡喃和2-氨基-5-氧代-4,5-二氢吡喃[3,2- c] chromene-3-carbontritrile衍生物。合成的纳米催化剂具有无毒，反应时间短，后处理容易，在温和的反应条件下反应曲线更干净等优点。