Synthesis and characterization of novel rhodium and ruthenium based iminopyridyl complexes and their application in 1-octene hydroformylation
作者:Jacquin October、Selwyn F. Mapolie
DOI:10.1016/j.jorganchem.2017.03.049
日期:2017.7
various benzyl bromide derivatives. These ligands were subsequently complexed to Ru and Rh using [(η6-p-cymene)RuCl2}2] and [RhCl(COD)]2 as metal precursors respectively, leading to the formation of several novel ruthenium and rhodiumcomplexes. The complexes obtained ranged from mononuclear to tetranuclear in nature. All complexes prepared were fully characterised using a range of analytical techniques
通过使4-((2-吡啶基亚甲基)氨基)苯酚与各种苄基溴衍生物反应,制备了从单官能到四官能类似物的几种新型亚氨基吡啶基配体。这些配体随后被复合到Ru和Rh组成使用[(η 6 - p -cymene)的RuCl 2 } 2 ]和[的RhCl(COD)] 2分别作为金属前体,导致形成几种新型钌和铑配合物。所获得的复合物的性质从单核到四核。使用一系列分析技术,包括红外和核磁共振波谱,质谱和元素分析,对所有制备的配合物进行了全面表征。然后,以1-辛烯为模型底物,将制备的配合物评估为烯烃加氢甲酰化反应中的催化剂前体。发现在较温和的反应条件下,铑基催化剂比钌催化剂更具活性。多核复合物的活性似乎与复合物的核相关,因为随着复合物核的增加,观察到活性的总体增加。
Alkylation of Amines Via Tandem Hydroaminomethylation Using Imino-Pyridine Complexes of Rhodium as Catalyst Precursors
作者:Jacquin October、Selwyn F. Mapolie
DOI:10.1007/s10562-019-02998-y
日期:2020.4
Abstract Novel cationic Rh(I) imino-pyridine complexes were evaluated as catalyst precursors in the hydroaminomethylation of 1-octene in conjunction with both primary (aniline and benzylamine) and secondaryamines (piperidine). These complexes were found to be highly efficient catalysts in mediating a one-pot hydroaminomethylation reaction. High chemoselectivities towards the target secondary and tertiary
Palladium-Schiff Base Complex Immobilized Covalently on Magnetic Nanoparticles as an Efficient and Recyclable Catalyst for Heck and Suzuki Cross-Coupling Reactions
Pd-imino-Py-γ-Fe2O3 was successfully applied as a magnetically recyclable heterogeneous catalyst in Heck and Suzukicross-couplingreactions of various aryl halides (iodide, bromides and chlorides as challenging substrates) with olefins and phenylboronic acid, respectively. The synthesized catalyst was separated easily by using an external magnet and recycled eight runs without appreciable loss of its catalytic
Silica-coated nano-Fe<sub>3</sub>
O<sub>4</sub>
-supported iminopyridine palladium complex as an active, phosphine-free and magnetically separable catalyst for Heck reactions
作者:Qiang Zhang、Xin Zhao、Huai-Xin Wei、Ji-Hang Li、Jun Luo
DOI:10.1002/aoc.3608
日期:2017.5
magnetic nanoparticle‐supported iminopyridine palladium complex was successfully prepared by attaching palladium acetate to iminopyridine ligand‐functionalized silica‐coated nano‐Fe3O4. The as‐prepared catalyst was well characterized and was evaluated in Heckreactions in terms of activity and recyclability. It was found to be highly efficient for the reactions of various aryl iodides and aryl bromides
通过将乙酸钯附着在亚氨基吡啶配体官能化的二氧化硅纳米Fe 3 O 4上,成功制备了一种新型的磁性纳米粒子支撑的亚氨基吡啶钯配合物。所制备的催化剂已得到很好的表征,并在Heck反应中就活性和可回收性进行了评估。发现在无磷和惰性无气氛条件下,具有各种吸电子基团的各种芳基碘化物和芳基溴化物与烯烃的反应非常高效。此外,可以使用外部磁体方便地回收催化剂,并且可回收性受Heck反应中的碱影响。当三乙胺作为碱时,该催化剂可重复使用至少六次,而活性没有明显损失。
“Click” magnetic nanoparticle-supported palladiumcatalyst: a phosphine-free, highly efficient and magnetically recoverable catalyst for Suzuki–Miyaura coupling reactions
作者:Qiang Zhang、Hong Su、Jun Luo、Yunyang Wei
DOI:10.1039/c2cy20532g
日期:——
A novel magneticnanoparticle-supported nano-palladium catalyst was successfully prepared via a “click” route. The as-prepared catalyst was well characterized and evaluated in Suzuki–Miyaura coupling in terms of activity and recyclability in aqueous ethanol. It was found to be highly efficient for the reactions of various aryl bromides with arylboronic acids under phosphine-free and low Pd loading