Hybrid Pd/Fe3O4 nanowires: Fabrication, characterization, optical properties and application as magnetically reusable catalyst for the synthesis of N-monosubstituted ureas under ligand-free conditions
作者:Mahmoud Nasrollahzadeh、Abbas Azarian、Ali Ehsani、S.Mohammad Sajadi、Ferydon Babaei
DOI:10.1016/j.materresbull.2014.03.038
日期:2014.7
Abstract This paper reports the synthesis and use of Pd/Fe 3 O 4 nanowires, as magnetically separable catalysts for ligand-free amidation coupling reactions of aryl halides with benzylurea under microwave irradiation. Then, the in situ hydrogenolysis of the products was performed to afford the N -monosubstituted ureas from good to excellent yields. This method has the advantages of high yields, simple
摘要 本文报道了Pd/Fe 3 O 4 纳米线的合成和应用,该纳米线作为磁性可分离催化剂,用于在微波辐射下芳基卤化物与苄脲的无配体酰胺化偶联反应。然后,进行产物的原位氢解以提供从良好到优异产率的N-单取代脲。该方法具有收率高、方法简单、易操作等优点。该催化剂可以通过使用磁铁回收并重复使用多次而不会显着降低其催化活性。使用粉末XRD、SEM、EDS和UV-vis光谱对催化剂进行表征。实验吸收光谱与甘斯理论的结果进行了比较。