Heterogeneous Hydroxyl-Directed Hydrogenation: Control of Diastereoselectivity through Bimetallic Surface Composition
作者:Alexander J. Shumski、William A. Swann、Nicole J. Escorcia、Christina W. Li
DOI:10.1021/acscatal.1c01434
日期:2021.5.21
surface. In this work, we demonstrate that Pd–Cu bimetallic nanoparticles with both Pd and Cu atoms distributed across the surface are capable of high conversion and diastereoselectivity in the hydroxyl-directed hydrogenation reaction of terpinen-4-ol. We postulate that the OH directing group adsorbs to the more oxophilic Cu atom while the olefin and hydrogen bind to adjacent Pd atoms, thus enabling selective
定向氢化反应通常由均相的Rh和Ir络合物催化,其中产物的选择性取决于底物上辅助定向基团与催化剂的结合。由于缺乏对催化剂表面上底物结合取向的控制,没有一种多相催化剂能够达到相当高的方向性。在这项工作中,我们证明了Pd和Cu原子分布在整个表面上的Pd-Cu双金属纳米粒子在萜品烯-4-醇的羟基定向加氢反应中具有很高的转化率和非对映选择性。我们假设OH导向基团吸附到更具亲氧性的Cu原子上,而烯烃和氢键合到相邻的Pd原子上,