二氧化硅包覆NiFe_2O_4担载Preyssler杂多酸用于合成双(二氢嘧啶酮)苯和3,4-二氢嘧啶-2(1H)-酮（英文）  

Preyssler heteropolyacid supported on silica coated NiFe_2O_4 nanoparticles for the catalytic synthesis of bis(dihydropyrimidinone)benzene and 3,4-dihydropyrimidin-2(1H)-ones

作　　者：Hossein Eshghi Ali Javid Amir Khojastehnezhad Farid Moeinpour Fatemeh F. Bamoharram Mehdi Bakavoli Masoud Mirzaei 

机构地区：[1]Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran [2] Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran [3] Department of Chemistry, Bandar Abbas Branch, Islamic Azad University, Bandar Abbas, 7915893144, Iran [4] Department of Chemistry, College of Science, Mashhad Branch, Islamic Azad University, Mashhad, Iran

出　　处：《催化学报》2015年第3期299-307,共9页

基　　金：Ferdowsi and Islamic Azad University,Mashhad and Bandar Abbas Branches for financial support

摘　　要：A novel magnetic acidic catalyst comprising Preyssler(H14[Na P5W30O110]) heteropoly acid support‐ed on silica coated nickel ferrite nanoparticles (Ni Fe2O4@Si O2) was prepared.The catalyst was characterized by Fourier transform infrared,scanning electron microscopy,transmission electron microscopy,X‐ray diffraction,energy dispersive spectrum,VSM and particle size neasurement.Its catalytic activity was investigated for the synthesis of bis(dihydropyrimidinone)benzene and 3,4‐dihydropyrimidin‐2(1H)‐ones derivatives by the Biginelli reaction.With the catalyst,the reac‐tions occurred in less than 1 h with good to excellent yields.More importantly,the catalyst was easily separated from the reaction mixture by an external magnet and reused at least five times without degradation in the activity.A novel magnetic acidic catalyst comprising Preyssler（H14[Na P5W30O110]） heteropoly acid support‐ed on silica coated nickel ferrite nanoparticles （Ni Fe2O4@Si O2） was prepared.The catalyst was characterized by Fourier transform infrared,scanning electron microscopy,transmission electron microscopy,X‐ray diffraction,energy dispersive spectrum,VSM and particle size neasurement.Its catalytic activity was investigated for the synthesis of bis（dihydropyrimidinone）benzene and 3,4‐dihydropyrimidin‐2（1H）‐ones derivatives by the Biginelli reaction.With the catalyst,the reac‐tions occurred in less than 1 h with good to excellent yields.More importantly,the catalyst was easily separated from the reaction mixture by an external magnet and reused at least five times without degradation in the activity.

关 键 词：二氢嘧啶酮 催化合成 纳米颗粒 镍铁 二氧化硅 扫描电子显微镜 透射电子显微镜 反应混合物 

分 类 号：O626.41[理学—有机化学]