Copper/Schiff-base complex immobilized on KIT-6-NH₂ magnetic nanoparticles as a novel heterogeneous catalyst was synthesized and the structure and morphology of nanomagnetic catalyst was characterized by Fourier transform infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDX), Xray diffraction patterns (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), zeta potential, Magnetization curve (VSM) and thermal gravimetric analysis (TGA). The new synthesized catalyst was found to be an efficient nanocatalyst for the synthesis new derivatives of pyrazolyl, bis and tris dihydropyridines via one-pot three-component condensation reaction of various aldehydes, dimedone and NH₄OAc in aqeous media. The products were identified by ¹H NMR, FT-IR and CHNS analysis. In some cases, ¹³C NMR were taken. This new procedure has the notable advantages such as operational simplicity, excellent yields, short reaction time, easy work-up, eco-friendly and nontoxic catalyst. Also the catalyst can be easily recovered by an external magnetic field and reused for six consecutive reaction cycles without significant loss of activity.

合成了固定在KIT-6-NH ₂磁性纳米粒子上的铜/席夫碱复合物作为新型非均相催化剂，并通过傅里叶变换红外光谱（FT-IR），能量色散X射线表征了纳米磁性催化剂的结构和形貌。光谱（EDX），X射线衍射图（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），ζ电位，磁化曲线（VSM）和热重分析（TGA）。发现该新型合成催化剂是通过在水溶液介质中通过各种醛，二甲酮和NH ₄ OAc的一锅三组分缩合反应合成吡唑基，双和三二氢吡啶的新衍生物的有效纳米催化剂。产品以¹标识1 H NMR，FT-IR和CHNS分析。在某些情况下，采用¹³ C NMR。该新方法具有显着的优点，例如操作简便，产率高，反应时间短，易于后处理，环保且无毒的催化剂。同样，该催化剂可以容易地通过外部磁场回收并在六个连续的反应循环中重复使用而没有明显的活性损失。