Ionic liquid supported on magnetic nanoparticles as a novel reusable nanocatalyst for the efficient synthesis of tetracyclic quinazoline compounds
作者:Arash Ghorbani-Choghamarani、Zahra Taherinia、Mohsen Nikoorazm
DOI:10.1007/s11164-018-3510-1
日期:2018.11
A magnetic ionic liquid supported on γ-Fe2O3 nanocatalyst was synthesized successfully and characterized by Fourier transform infrared spectroscopy, vibrating sample magnetometry, thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction and scanning electron microscopy. The resulting nano-Fe3O4-supported, ionic liquid was an efficient catalyst for preparation of a series of tetracyclic quinazoline compounds by three components reaction of a mixture of isatoic anhydride and amine with ninhydrin in PEG and the desired products were obtained in good to excellent yields. High efficiency, waste-free, mild reaction conditions, effortless magnetic recovery and reusability up to four continuous cycles are the noteworthy features of the currently employed heterogeneous catalytic system.
成功合成了一种负载在γ-Fe2O3纳米催化剂上的磁性离子液体,并通过傅里叶变换红外光谱、振动样品磁强计、热重分析、差示扫描量热法、X射线衍射和扫描电子显微镜进行了表征。结果得到的纳米Fe3O4负载的离子液体是一种高效的催化剂,通过异佛尔酮与异氮磷酸和胺在PEG中的三组分反应制备一系列四环喹唑啉化合物,并得到了良好至优异产率的所需产物。高效、无废弃物、温和的反应条件、轻松磁回收和可重复使用多达四个连续循环是当前采用的非均相催化体系的显著特点。