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′‐bridged binuclear NHC palladium complexes: A combined experimental catalytic and computational study for the Suzuki reaction
作者:Ming‐Tsz Chen、Bing‐Yan Hsieh、Yi‐Hung Liu、Kuo‐Hui Wu、Natália Lussari、Ataualpa A.C. Braga
DOI:10.1002/aoc.5870
日期:2020.10
This work examines how N‐donor bridged spacer ligands affect N‐heterocyclic carbene (NHC) palladium complexescatalyticactivities for Suzuki coupling reaction. Different degrees of structural flexibility binuclear NHC palladium complexes were synthesized. The more flexible nitrogen‐based alkyl chain ligand shows similar performance with cycloamine counterparts in the Suzuki coupling reaction. Suzuki
a novel catalyst consisting of ordered mesoporous silica (SBA‐15) functionalized with bis(thiourea) (BTU) linker. The regular and unique pore channels of BTU‐SBA‐15 ensure proper control of the size and homogeneous distribution of palladium nanoparticles. The physiochemical properties of the hybrid Pd@BTU‐SBA‐15 pre‐catalyst were investigated using various techniques. The proposed catalyst is found
Thiourea bridged periodic mesoporous organosilica with ultra-small Pd nanoparticles for coupling reactions
作者:Esmail Doustkhah、Sadegh Rostamnia、Masataka Imura、Yusuke Ide、Shiva Mohammadi、Christopher J. T. Hyland、Jungmok You、Nao Tsunoji、Behzad Zeynizadeh、Yusuke Yamauchi
DOI:10.1039/c7ra11711f
日期:——
A synthesis of thiourea-bridged mesoporous organosilica is reported.
一种硫脲桥联介孔有机硅合成物的综述报道。
Pd(OAc)<sub>2</sub>
@SBA-15/PrEn nanoreactor: a highly active, reusable and selective phosphine-free catalyst for Suzuki-Miyauracross-coupling reaction in aqueous media
作者:Sadegh Rostamnia、Hongchuan Xin
DOI:10.1002/aoc.2986
日期:2013.5
of ordered mesoporous organic–inorganic hybrid material was designed by using the amine‐functionalizedSBA‐15 (PdX2@SBA‐15/NY, Y = 1, 2) as solid support for palladium complexes. Among them, the Pd(OAc)2/ethylenediamine complex encapsulated into SBA‐15 (Pd(OAc)2@SBA‐15/PrEn or Pd(OAc)2@SBA‐15/PrNHEtNH2) exhibits higher activity and selectivity toward Suzuki cross‐coupling reaction under aerobic conditions
Oxygen-promoted PdCl<sub>2</sub>-catalyzed ligand-free Suzuki reaction in aqueous media
作者:Chun Liu、Qijian Ni、Pingping Hu、Jieshan Qiu
DOI:10.1039/c0ob00524j
日期:——
A simple and efficient protocol has been developed for the PdCl2-catalyzed ligand-free and aerobic Suzuki reaction of aryl bromides or nitrogen-based heteroaryl bromides with arylboronic acids in good to excellent yields in aqueous ethanol. A systematic investigation on the effect of different atmospheres on the reactivity of the palladium-catalyzed Suzuki reaction has been carried out, the results show that an aerobic atmosphere demonstrates a positive effect on the reactivity of the Suzuki reaction in an aqueous media and a negative effect in a pure organic solvent, which exhibits that the water plays a crucial role for the function of the atmosphere on the palladium-catalyzed ligand-free Suzuki reaction.