A simple and efficient room temperature silylation of diverse functional groups with hexamethyldisilazane using CeO2 nanoparticles as solid catalysts
作者:Nagaraj Anbu、Chellappa Vijayan、Amarajothi Dhakshinamoorthy
DOI:10.1016/j.mcat.2019.03.015
日期:2019.9
In this study, a mild and efficient method is developed for the silylation of diverse functional groups using CeO2 nanoparticles (n-CeO2) as solid catalysts with hexamethyldisilazane (HMDS) as silylating agent at room temperature. Alcohols, phenols and acids are silylated to their respective silyl derivatives with faster reaction rate while amines and thiols required relatively longer reaction time
在这项研究中,开发了一种温和而有效的方法,用于使用CeO 2纳米颗粒(n-CeO 2)作为固体催化剂,在室温下以六甲基二硅氮烷(HMDS)作为甲硅烷基化剂。醇,酚和酸以更快的反应速率被甲硅烷基化为它们各自的甲硅烷基衍生物,而胺和硫醇则需要相对较长的反应时间。而且,固体催化剂易于从反应混合物中分离并循环使用五次以上,而其活性没有任何明显的下降。粉末X射线衍射(XRD),透射电子显微镜(TEM),紫外可见漫反射光谱(UV-DRS)和拉曼分析显示,与再利用的固体相比,重复使用的固体具有相同的结构完整性,粒径,吸收边缘和化合价态。新鲜的固体催化剂。