(¦Á-Fe₂O₃)-MCM-41 as a magnetically recoverable nanocatalyst for the synthesis of pyrazolo[4,3-c]pyridines at room temperature

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• 作者：Shahnaz Rostamizadeh ; Nasrin Shadjou ; Mohammad Azad ; Nima Jalali
• 关键词：Pyrazolo[4 ; 3-c]pyridines ; Magnetically separable catalyst ; (¦Á-Fe2O3)-MCM-41
• 刊名：Catalysis Communications
• 出版年：2012
• 出版时间：5 September, 2012
• 年：2012
• 卷：26
• 期：Complete
• 页码：218-224
• 全文大小：1168 K

文摘

MCM-41 embedded magnetic nanoparticles which was prepared through the formation of MCM-41 in the presence of Fe₃O₄ nanoparticles has been used as a magnetically recoverable catalyst for the synthesis of new series of pyrazolo[3,4-c]pyridine derivatives. This catalyst with 10 wt. % of loaded iron oxide nanoparticles was highly recyclable (up to 5 times), and was easily recovered from the reaction mixture using an external magnet without loss of activity. The prepared magnetic catalyst is characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR), nitrogen physisorption measurements, and acid-base titration.