Cellulose/silica supported Schiff base Pd(II) catalyst for copper-free Sonogashira cross-coupling
作者:Pravin S. Pharande、Pradeep M. Mhaldar、Mayuri V. Patil、Suraj A. Sonawane、Shrikrishna T. Salunke、Dattaprasad M. Pore
DOI:10.1007/s11164-023-05186-1
日期:2024.2
Sonogashira cross-coupling. Varity of functionalized diary acetylene derivatives have been achieved with admirable yields from coupling of aryl halides and phenyl acetylenes. The XRD, SEM and TGA analysis of recycled catalyst revealed remarkable catalytic activity. The proposed approach exhibits remarkable merits such as impressively low catalyst loading (0.009 mol%), elevated turnover numbers (up to 10
摘要 在本研究中,以纤维素为载体,设计并合成了纤维素/二氧化硅负载的希夫碱Pd(II)催化剂,缩写为Cell/SiO 2 -Sal-Pd(II)。采用FTIR、XRD、TGA、SEM、EDS、BET/BJH等先进技术对催化剂进行了综合表征。根据EDX分析,发现钯的负载量为0.017mol%。TEM 分析显示催化剂的粒径约为 70 nm。Cell/SiO 2 -Sal-Pd(II)的催化效率在 Sonogashira 交叉偶联的背景下进行了彻底的审查。通过芳基卤化物和苯乙炔的偶联,已经获得了各种官能化二芳基乙炔衍生物,且收率令人赞叹。回收催化剂的 XRD、SEM 和 TGA 分析显示出显着的催化活性。所提出的方法具有显着的优点,例如令人印象深刻的低催化剂负载量(0.009 mol%)、较高的周转数(高达 10,556)、值得称赞的周转频率(高达 3519)、出色的热稳定性(高达 356.75