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One-pot synthesis of 2-amino-4H-chromene derivatives by MNPs@Cu as an effective and reusable magnetic nanocatalyst

机译:MNPs @ Cu一锅合成2-氨基-4H-色烯衍生物作为有效且可重复使用的磁性纳米催化剂

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In this research, MNPs@Cu as an effective and recyclable nanocatalyst was prepared and characterized using different methods including Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), vibrating sample magnetometry (VSM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). After the characterization of this new nanocatalyst, it was efficiently used for the promotion of the one-pot synthesis of 2-amino-4 H -chromene derivatives via one-pot three-component reaction of the enolizable compound, malononitrile, and arylaldehydes under solvent-free conditions at 90?°C. The procedure gave the desired products in high-to-excellent yields in short reaction times. Also this catalyst, because of its magnetic nature, can be simply restored by a permanent magnetic field and comfortably reused several times without any significant loss of its catalytic activity.
机译:在这项研究中,制备了MNPs @ Cu作为有效和可回收的纳米催化剂,并使用不同的方法进行了表征,包括傅里叶变换红外光谱(FT-IR),热重分析(TGA),振动样品磁力法(VSM),扫描电子显微镜(SEM) ,能量色散X射线光谱(EDX)和X射线衍射(XRD)。表征了这种新型纳米催化剂后,通过溶剂中可烯化的化合物,丙二腈和芳醛的一锅三组分反应,将其有效地用于促进一锅合成2-氨基-4 H-色烯衍生物。 -90°C下无温度的条件。该程序在短的反应时间内以高至优异的产率获得了所需的产物。同样,由于其磁性,该催化剂可以通过永久磁场简单地恢复,并且可以舒适地重复使用几次,而不会显着降低其催化活性。

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