Polymer-Supported Palladium(II) Carbene Complexes: Catalytic Activity, Recyclability, and Selectivity in C−H Acetoxylation of Arenes
作者:Maitham H. Majeed、Payam Shayesteh、L. Reine Wallenberg、Axel R. Persson、Niclas Johansson、Lei Ye、Joachim Schnadt、Ola F. Wendt
DOI:10.1002/chem.201700777
日期:2017.6.22
naphthalene compared to the best homogeneous catalysts. The new polymer-supported catalysts maintain the original oxidation state of PdII after repeated catalytic reactions, and exhibit no significant leaching of palladium. In addition, the new catalysts have been successfully recovered and reused without loss of activity over several cycles of reactions.
通过新型N-杂环卡宾-钯(II)(NHC-Pd II)单体与二乙烯基苯的共聚反应,合成了用于CH键选择性氧化的非均相催化剂。聚合物支持的NHC-Pd II催化的简单和甲基化的芳烃以及聚芳烃的无方向C-H乙酰氧基化,与它们的均相类似物相比具有相似或更高的效率。特别地,与最佳均相催化剂相比,联苯和萘的乙酰氧基化反应的区域选择性得到了改善。新的聚合物负载型催化剂保持了Pd II的原始氧化态经过反复的催化反应,并没有显示出明显的钯浸出。此外,新催化剂已经成功回收并重复使用,并且在多个反应循环中都没有损失活性。