Boronic acid functionalized silica‐coated Fe<sub>3</sub>O<sub>4</sub> as a novel magnetically separable catalyst for the synthesis of hydrazinyl thiazoles
作者:Archana Yadav、Rutuja Zond、Sushilkumar Jadhav、Shankar Hangirgekar、Sandeep Sankpal
DOI:10.1002/aoc.7282
日期:2023.12
sample magnetometry (VSM) techniques. The structural investigations revealed that the catalyst is nano-sized (average crystallite size 13 nm), spherical, thermally stable, and magnetic in nature having a magnetic saturation of 51.26 emu/g. The catalytic activity of Fe3O4@SiO2-Pr-N=CH-C6H4B(OH)2 was explored in the synthesis of hydrazinyl thiazoles via one-pot, three-component reaction of phenacyl halide
采用简单的合成方案合成了一种新型二氧化硅包覆磁铁矿负载的硼酸功能化纳米催化剂(Fe 3 O 4 @SiO 2 -Pr-N=CH-C 6 H 4 B[OH] 2 )。采用傅里叶变换红外(FT-IR)、X射线衍射(XRD)、能量色散X射线(EDX)、热重-差热分析(TGA-DTA)、场发射扫描电子等手段对催化剂进行了全面表征。显微镜 (FE-SEM)、透射电子显微镜 (TEM) 和振动样品磁强计 (VSM) 技术。结构研究表明,该催化剂具有纳米尺寸(平均晶粒尺寸13 nm)、球形、热稳定和磁性,磁饱和度为51.26 emu/g。探讨了Fe 3 O 4 @SiO 2 -Pr-N=CH-C 6 H 4 B(OH) 2在苯甲酰卤、氨基硫脲和氨基硫脲的一锅三组分反应合成肼基噻唑中的催化活性。室温下,在EtOH:H 2 O(50:50,v/v )中与芳基醛反应,得到超过90%产率的肼基噻唑。该催化剂可磁