Cyclodextrin-Grafted Silica-Supported Pd Nanoparticles: An Efficient and Versatile Catalyst for Ligand-Free C−C Coupling and Hydrogenation
作者:Katia Martina、Francesca Baricco、Marina Caporaso、Gloria Berlier、Giancarlo Cravotto
DOI:10.1002/cctc.201501225
日期:2016.3.18
irradiation has been shown to have a beneficial effect on catalyst preparation. The catalyst exhibited excellent activity in ligand‐free C−C Suzuki and Heck couplings with a large number of aryl iodide and bromides, in which microwave irradiation use cuts down reaction time. Pd/Si‐CD have shown high activity and selectivity in the hydrogenation reaction, and the semihydrogenation of phenyl acetylene was also
二氧化硅是一种用途极为广泛的载体,能够容纳金属纳米颗粒(NP)并增强其稳定性和反应性。在这项研究中,我们已经为Pd NPs制备了一种新型的环糊精/二氧化硅载体,我们将其称为Pd / Si-CD。在常规条件下已经在该载体上高效且均匀地浸渍了小钯纳米颗粒,并且已经证明超声辐射对催化剂的制备具有有益的作用。该催化剂在无配体的CC Suzuki和Heck偶联以及大量的芳基碘和溴化物中表现出出色的活性,其中微波辐射的使用缩短了反应时间。Pd / Si-CD在氢化反应中显示出高活性和选择性,