Macroporous magnetic poly(GMA-EGDMA-DVB) microspheres supported palladium complex as an efficient catalyst for Heck reaction

Yuan, Ding; Zhang, Qiu Yu; Dou, Jin Bo

doi:10.1016/j.cclet.2010.04.025

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…Yuan et al have reported the synthesis of variouss uper-paramagnetic composite microspheres composed of magnetic cores and polymer shells. [106,107] The polymers hellss tabilizet he nanoparticles by preventing aggregation of the inorganic cores, andt hey also provide suitable functional groups for the immobilization of Pd on their surfaces for Heck reactions. The catalysti sp repared in two steps (Scheme 71).…”

Section: Magnetic Nanoparticles With Inorganic Carbon or Polymeric mentioning

confidence: 99%

ChemInform Abstract: Recent Applications of Magnetically Recoverable Nanocatalysts in C—C and C—X Coupling Reactions

2015

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Section: Magnetic Nanoparticles With Inorganic Carbon or Polymeric mentioning

confidence: 99%

ChemInform Abstract: Recent Applications of Magnetically Recoverable Nanocatalysts in C—C and C—X Coupling Reactions

2015

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“…Metal nanoparticles (MNPs) are an important class of catalysts [1,2]. Among various metals, palladium has been most widely studied for many organic reactions including oxidation [3][4][5][6][7], reduction [8][9][10], hydrogenation [11,12], and cross coupling reactions [13][14][15][16][17], gas adsorption/release applications [18,19], and biological applications [20]. MNPs generally exhibit high activities; however, particle leaching and agglomeration can lead to decline in their performance [17].…”

Section: Introductionmentioning

confidence: 99%

Pd Nanoparticles-Loaded Vinyl Polymer Gels: Preparation, Structure and Catalysis

et al. 2021

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Four vinyl polymer gels (VPGs) were synthesized by free radical polymerization of divinylbenzene, ethane-1,2-diyl dimethacrylate, and copolymerization of divinylbenzene with styrene, and ethane-1,2-diyl dimethacrylate with methyl methacrylate, as supports for palladium nanoparticles. VPGs obtained from divinylbenzene and from divinylbenzene with styrene had spherical shapes while those obtained from ethane-1,2-diyl dimethacrylate and from ethane-1,2-diyl dimethacrylate with methyl methacrylate did not have any specific shapes. Pd(OAc)2 was impregnated onto VPGs and reduced to form Pd0 nanoparticles within VPGs. The structures of Pd0-loaded VPGs were analyzed by XRD, TEM, and nitrogen gas adsorption. Pd0-loaded VPGs had nanocrystals of Pd0 within and on the surface of the polymeric supports. Pd0/VPGs efficiently catalyzed the oxidation/disproportionation of benzyl alcohol into benzaldehyde/toluene, where activity and selectivity between benzaldehyde and toluene varied, depending on the structure of VPG and the weight percentage loading of Pd0. The catalysts were stable and Pd leaching to liquid phase did not occur. The catalysts were separated and reused for five times without any significant decrease in the catalytic activity.

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“…Among different methods, the reaction of aryl halides with olefinic compounds, the Heck reaction, is an excellent method for the synthesis of organic compounds [6,7]. Many Pd complexes have been used as homogeneous catalysts in these reactions [8][9][10][11]. Although some of the Pd complexes have potential for recycling [11,12], most of them have problems such as deactivation and difficult separation from solution due to the aggregation of Pd nanoparticles formed in situ during the reaction.…”

Section: Introductionmentioning

confidence: 99%

“…Many Pd complexes have been used as homogeneous catalysts in these reactions [8][9][10][11]. Although some of the Pd complexes have potential for recycling [11,12], most of them have problems such as deactivation and difficult separation from solution due to the aggregation of Pd nanoparticles formed in situ during the reaction. Thus, it is necessary to develop heterogeneous catalysts which can easily be recovered from the reaction system and reused [13,14].…”

Section: Introductionmentioning

confidence: 99%

Pd-poly(N-vinyl-2-pyrrolidone)/KIT-6 nanocomposite: Preparation, structural study, and catalytic activity

Kalbasi

Mosaddegh

2012

Comptes Rendus. Chimie

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The Pd-poly(N-vinyl-2-pyrrolidone)/KIT-6 nanocomposite was prepared by an in situ polymerization method and used as an efficient heterogeneous catalyst for C-C bond formation through the Heck coupling reaction of aryl iodides, bromides and chlorides with styrene. The physical and chemical properties of the catalyst were characterized by XRD, BET, FT-IR, TGA, UV-Vis and TEM techniques. The reactions were performed in methanolwater as solvent and the products were obtained in high yield and purity after a simple work-up. The stability of the nanocomposite catalyst was excellent and could be reused 8 times without much loss of activity in the Heck coupling reaction.

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Macroporous magnetic poly(GMA-EGDMA-DVB) microspheres supported palladium complex as an efficient catalyst for Heck reaction

Cited by 10 publications

References 22 publications

ChemInform Abstract: Recent Applications of Magnetically Recoverable Nanocatalysts in C—C and C—X Coupling Reactions

ChemInform Abstract: Recent Applications of Magnetically Recoverable Nanocatalysts in C—C and C—X Coupling Reactions

Pd Nanoparticles-Loaded Vinyl Polymer Gels: Preparation, Structure and Catalysis

Pd-poly(N-vinyl-2-pyrrolidone)/KIT-6 nanocomposite: Preparation, structural study, and catalytic activity

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