Synthesis and characterization of a novel Fe3O4@SiO2/bipyridinium dichloride nanocomposite and its application as a magnetic and recyclable phase-transfer catalyst in the preparation of β-azidoalcohols, β-cyanohydrins, and β-acetoxy alcohols
作者:Ali Reza Kiasat、Fatemeh Chadorian、Seyyed Jafar Saghanezhad
DOI:10.1016/j.crci.2015.06.019
日期:2015.12
Résumé β-Azidoalcohols, β-cyanohydrins, and β-acetoxy alcohols have been synthesized in the presence of a Fe3O4@SiO2/bipyridinium nanocomposite (Fe3O4@SiO2/BNC) as a novel magnetic and recyclable phase-transfer catalyst (PTC) in water. The catalyst was characterized with FT–IR, SEM, XRD, VSM, and TGA. This methodology offers several advantages, including easy work-up procedure, excellent regioselectivity, high yields, short reaction times, recyclable catalyst, easy separation of the catalyst through an external magnet and eco-friendly procedure.
摘要 β-叠氮醇、β-氰醇和 β-乙酰氧基醇在作为新型磁性可回收相转移催化剂(PTC)的 Fe3O4@SiO2/ 联吡啶纳米复合材料(Fe3O4@SiO2/BNC)存在下于水中合成。该催化剂通过傅立叶变换红外光谱、扫描电镜、XRD、VSM 和热重分析进行了表征。该方法具有多个优点,包括操作简便、具有优异的区域选择性、产率高、反应时间短、催化剂可回收、催化剂易于通过外部磁铁分离以及操作过程环保。