key to improving catalytic activities. Amongst various catalytic reactions, supported Pd nanoparticles-catalyzed C–C cross-couplingreactions have been attracting a great deal of attention in the last decade. Although various supports have been examined, applications of hierarchically porous monolithic materials have never been reported, mainly because of difficulties in multistep synthesis of catalysts
An Efficient and Recyclable Catalytic System: PdCl2-Dppc+-PF6 –-[bmim][PF6] for Heck Coupling Reaction
作者:Liang Liu、Xiao Ming Song、Jin Tao Guan、Zhi Yong Zhang、Ben Mei Wei
DOI:10.14233/ajchem.2015.17749
日期:——
An efficient PdCl2-Dppc+-PF6–-[bmim][PF6] catalytic system has been developed for the Heck coupling reaction of various aryl iodides with olefins. The catalytic system allows the coupling reaction to proceed smoothly in excellent yields and can be recycled 5 times with minimal loss of activity.
Ultra‐small and highly dispersed Pd nanoparticles inside the pores of ZIF‐8: Sustainable approach to waste‐minimized Mizoroki–Heck cross‐coupling reaction based on reusable heterogeneous catalyst
material, namely Pd nanoparticles@N‐heterocyclic carbene@ZIF‐8, with a high internal surface area was successfully prepared using a dispersed anionic sulfonated N‐heterocyclic carbene–Pd(II) precursor inside the cavities of zeolitic imidazolate framework (ZIF‐8) using an impregnation approach followed by reduction with NaBH4. The anionic sulfonated N‐heterocycliccarbene was found to be a superb ligand
The double protection of the organic cation [BMIM]+ and RGO can reduce the collision and agglomeration of Pd nanoparticles. Hence, the in situ prepared Pd/RGO can exhibit high efficiency and long-term catalytic stability for the Heck reaction in the ionic liquid.