Palladium Nanoparticles on Graphite Oxide as Catalyst for SuzukiMiyaura, MizorokiHeck, and Sonogashira Reactions
作者:Luigi Rumi、Gil M. Scheuermann、Rolf Mülhaupt、Willi Bannwarth
DOI:10.1002/hlca.201000412
日期:2011.6
system was applied successfully to SuzukiMiyaura couplings of some aryl chlorides and to the MizorokiHeck as well as the Sonogashira reaction showing relatively high activities and good selectivities. Like with other ligand‐free supported systems, the reaction proceeded dominantly by a homogeneous mechanism, but attack of an aryl iodide to Pd‐nanoparticles can be excluded as substantial contribution
Pd 2+交换的氧化石墨(GO)用作Pd纳米颗粒形成的预催化剂,然后沉积在高度官能化的碳质载体上。这种多功能的,空气稳定的,和游离配位体系统成功地应用于铃木宫浦一些芳基氯的偶合和所述Mizoroki 赫克以及所述的Sonogashira反应显示出较高的活性和良好的选择性。与其他无配体支持的体系一样,该反应主要通过均相机理进行,但是可以排除芳基碘对钯纳米颗粒的攻击,因为它对整个催化过程的重要贡献。该系统除了直接制备和在空气中稳定外,还结合了均相和异相催化的优点。