Nano‐Fe
<sub>3</sub>
O
<sub>4</sub>
@SiO
<sub>2</sub>
‐SO
<sub>3</sub>
H: A magnetic, reusable solid‐acid catalyst for solvent‐free reduction of oximes to amines with the NaBH
<sub>3</sub>
CN/ZrCl
<sub>4</sub>
system
作者:Leila Sadighnia、Behzad Zeynizadeh、Shiva Karami、Mohammad Abdollahi
DOI:10.1002/jccs.201800030
日期:2019.5
In this study, the immobilization of sulfonic acid on silica‐layered magnetite was carried out by the reaction of ClSO3H with silica‐layered magnetite. The prepared magnetic nanoparticles of Fe3O4@SiO2‐SO3H were then characterized using scanning electron microscopy, energy dispersive X‐ray spectroscopy, X‐ray diffraction, Fourier transform infrared spectroscopy, vibrating sample magnetometry, and transmission
在这项研究中,磺酸是通过ClSO 3 H与二氧化硅层磁铁矿的反应而固定在二氧化硅层磁铁矿上的。然后使用扫描电子显微镜,能量色散X射线光谱,X射线衍射,傅立叶变换红外光谱,振动样品磁强度和透射电子显微镜对制备的Fe 3 O 4 @SiO 2 -SO 3 H磁性纳米粒子进行表征。在ZrCl 4存在下,用NaBH 3 CN还原各种醛肟和酮肟时,磺化纳米复合材料表现出优异的催化活性和可重复使用性。。所有反应均在无溶剂条件下(室温或75-80°C)在3-70分钟内进行,以高到极好的收率得到胺。