| Preparation of a novel,efficient, and recyclable magnetic catalyst,γ-Fe_2O_3@HAp-Ag nanoparticles,and a solvent- and halogen-free protocol for the synthesis of coumarin derivatives |
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| 作者姓名： | Zahra Abbasi Sobhan Rezayati Maryam Bagheri Rahimeh Hajinasiri |
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| 作者单位： | a Young Researchers and Elite Club, Ilam Branch, Islamic Azad University, Ilam, Islamic Republic of Iran;
b Chemistry Department, Qaemshahr Branch, Islamic Azad University, PO BOX 163, Qaemshahr, Islamic Republic of Iran |
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| 基金项目： | We gratefully acknowledge funding from the National Elites Foundation of Iran for this research. |
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| 摘 要： | In this protocol, Ag supported on the hydroxyapatite-core–shell magnetic γ-Fe_2O_3nanoparticles(γFe_2O_3@HAp-Ag NPs) as a novel, efficient, and magnetically recyclable catalyst is synthesized, and characterized by transmission electron microscopy(TEM), scanning electron microscopy(SEM), Fourier transform infrared spectroscopy(FT-IR), X-ray diffraction(XRD), and vibrating sample magnetometry(VSM). The use of the catalyst is described in the synthesis of coumarin derivatives by the Pechmann condensation of various phenols with β-ketoesters under solvent- and halogen-free conditions at 80℃.This novel and inexpensive method offers advantages, such as recyclability simple experimental protocol, short reaction time, minimal work-up procedure, and excellent yields of products, together with desirable, eco-friendly, green aspects by avoiding toxic elements and solvents, and ease of recovery from the reaction mixture using an external magnet.
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Preparation of a novel,efficient, and recyclable magnetic catalyst,γ-Fe2O3@HAp-Ag nanoparticles,and a solventand halogen-free protocol for the synthesis of coumarin derivatives |
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| Zahra Abbasi,Sobhan Rezayati,Maryam Bagheri,Rahimeh Hajinasiri.Preparation of a novel,efficient, and recyclable magnetic catalyst,γ-Fe2O3@HAp-Ag nanoparticles,and a solventand halogen-free protocol for the synthesis of coumarin derivatives[J].Chinese Chemical Letters,2017,28(1):75-82. |
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| Authors: | Zahra Abbasi Sobhan Rezayati Maryam Bagheri Rahimeh Hajinasiri |
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| Institution: | a Young Researchers and Elite Club, Ilam Branch, Islamic Azad University, Ilam, Islamic Republic of Iran;
b Chemistry Department, Qaemshahr Branch, Islamic Azad University, PO BOX 163, Qaemshahr, Islamic Republic of Iran |
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| Abstract: | In this protocol, Ag supported on the hydroxyapatite-core-shell magnetic γ-Fe2O3 nanoparticles (γ-Fe2O3@HAp-Ag NPs) as a novel, efficient, and magnetically recyclable catalyst is synthesized, and characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and vibrating sample magnetometry (VSM). The use of the catalyst is described in the synthesis of coumarin derivatives by the Pechmann condensation of various phenols with β-ketoesters under solvent-and halogen-free conditions at 80℃. This novel and inexpensive method offers advantages, such as recyclability simple experimental protocol, short reaction time, minimal work-up procedure, and excellent yields of products, together with desirable, eco-friendly, green aspects by avoiding toxic elements and solvents, and ease of recovery from the reaction mixture using an external magnet. |
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| Keywords: | γ-Fe2O3 nanocatalyst Heterogeneous Catalyst Pechman condensation Ag supported |
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