Heterogeneous Catalysis by Covalent Organic Frameworks (COF): Pd(OAc)<sub>2</sub>@COF-300 in Cross-Coupling Reactions
作者:Raoni S. B. Gonçalves、Alline B. V. de Oliveira、Haryadylla C. Sindra、Bráulio S. Archanjo、Martín E. Mendoza、Leonardo S. A. Carneiro、Camilla D. Buarque、Pierre M. Esteves
DOI:10.1002/cctc.201500926
日期:2016.2
imine‐linked, crystalline, and microporous covalent organic framework, modified by coordination of Pd(OAc)2 to its walls, afforded a hybrid material, Pd(OAc)2@COF‐300, which was used as an efficient heterogeneous catalyst for cross‐coupling reactions. This material showed excellent catalytic activity for the phosphine‐free Suzuki–Miyaura, Heck, and Sonogashira cross‐coupling reactions with low palladium loadings
COF-300是一种亚胺连接的,结晶的,微孔的共价有机骨架,通过将Pd(OAc)2与其壁配位而改性,从而提供了杂化材料Pd(OAc)2 @ COF-300,该材料用作用于交叉偶联反应的高效多相催化剂。该材料对钯含量低(0.1 mol%Pd)的无膦的Suzuki-Miyaura,Heck和Sonogashira交叉偶联反应显示出优异的催化活性。反应后催化剂的X射线光电子能谱分析表明,Pd II转化为Pd 0,并被捕集在COFs纳米孔中。高分辨率透射电子显微镜证实了这一点。此外,使用Pd(OAc)获得了可喜的结果2 @ COF‐300在连续流动条件下进行的Suzuki–Miyaura交叉偶联反应。