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Preparation, Characterization, and Application Magnetic Fe 3 O 4 @SiO 2 @Bi 2 O 3 Nanoparticles for the Synthesis of Diindolyloxindole Derivatives
Russian Journal of Inorganic Chemistry ( IF 2.1 ) Pub Date : 2020-07-02 , DOI: 10.1134/s0036023620060054
H. Hassani , S. Ebrahim , N. Feizi

Abstract

In this study, synthesis of diindolyl oxindole derivatives has been developed by the coupling of indole compounds, isatin compounds, catalyzed with nanomagnetic Fe3O4@SiO2@Bi2O3. Reactions proceeded smoothly, and the corresponding heterocyclic products have been obtained in good to high yields. Magnetic Fe3O4@SiO2@Bi2O3 catalyst has been produced by the hydrothermal method. At first, the magnetic nanoparticles Fe3O4 have been produced as the core and subsequently they have been coated with SiO2; finally, in the third stage, Bi2O3 has been deposited on Fe3O4@SiO2. The synthesized catalyst has been characterized by Fourier-transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), thermal gravimetric analysis (TGA), dispersive energy X-ray spectroscopy (EDS), X-ray powder diffraction, vibrating sample Magnetometry (VSM), and transmission electron microscopy (TEM) techniques. This catalyst has been compared with other catalysts used in other methods for the synthesis of diindolyl oxindole derivatives. Using of water as the solvent, short reaction time, and recovery capability with a very slight reduction in the efficiency of the product even in the fourth stage of use are the advantages of application of this catalyst in the synthesis of derivatives of diindolyl oxindoles.


中文翻译:

磁性Fe 3 O 4 @SiO 2 @Bi 2 O 3纳米粒子的制备,表征及应用合成二吲哚基羟吲哚衍生物

摘要

在这项研究中,已经通过在纳米磁性Fe 3 O 4 @SiO 2 @Bi 2 O 3的催化下吲哚化合物,Isatin化合物的偶联来开发二吲哚基羟吲哚衍生物。反应进行顺利,并且已经以高至高收率获得了相应的杂环产物。通过水热法制备了磁性Fe 3 O 4 @SiO 2 @Bi 2 O 3催化剂。首先,制备了磁性纳米颗粒Fe 3 O 4作为核,然后将其涂覆了SiO 2; 最后,在第三阶段,Bi 2 O 3被沉积在Fe 3 O 4 @SiO 2上。合成的催化剂通过傅里叶变换红外光谱(FT-IR),场发射扫描电子显微镜(FESEM),热重分析(TGA),分散能X射线光谱(EDS),X射线粉末衍射,振动样品磁力计(VSM)和透射电子显微镜(TEM)技术。将该催化剂与用于合成二吲哚基羟吲哚衍生物的其他方法中使用的其他催化剂进行了比较。使用水作为溶剂,短的反应时间和甚至在使用的第四阶段中的回收率又非常轻微地降低产物的效率是该催化剂在合成二吲哚基羟吲哚衍生物中的应用的优点。
更新日期:2020-07-02
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