Highly active and recyclable heterogeneous palladium catalyst derived from guar gum for fabrication of biaryl compounds

Baran, Talat; Baran, Nuray Yılmaz; Menteş, Ayfer

doi:10.1016/j.ijbiomac.2019.04.042

Cited by 43 publications

(10 citation statements)

References 65 publications

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“…Hot filtration experiment was carried out to verify the heterogeneity of Pd@PI catalyst. [ 29,30 ] The Pd@PI catalyst was separated from reaction mixture after reacting for 30 min, and the filtrate was then allowed to reacting for another 4.5 h. Figure 6 shows that no further reaction occurred after the removal of Pd@PI catalyst, indicating that the reaction proceeded in a heterogeneous way.…”

Section: Resultsmentioning

confidence: 99%

Palladium nanoparticles encapsulated in polyimide nanofibers: An efficient and recyclable catalyst for coupling reaction

Gou

Gao

et al. 2021

Applied Organom Chemis

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In this study, palladium‐encapsulated poly(amic acid) (Pd@PAA) nanofibers were prepared by electrospinning, followed by thermal imidization to synthesize palladium‐encapsulated polyimide (Pd@PI) nanofibers. Scanning electron microscopy (SEM) images confirmed the preparation of uniform and smooth Pd@PAA and Pd@PI nanofibers. Thermogravimetric analysis (TGA) results reveal that the Pd@PI nanofibers possessed excellent thermal stability. The dispersion of palladium nanoparticles in the polyimide nanofibers was characterized by transmission electron microscopy (TEM) and X‐ray diffraction (XRD). The catalysis results show that this Pd@PI fibrous catalyst was very efficient to catalyze the cross‐coupling reactions of aromatic iodides with n‐butyl acrylate (Heck reaction) or phenylboronic acid derivatives (Suzuki reaction) to afford the desired products in good to excellent yields. Moreover, the Pd@PI catalyst could be easily separated and recovered from the reaction mixture by simple filtration due to the regular fibrous structure and reused for 10 times for both Heck and Suzuki reactions without obvious loss of its initial catalytic activity. Thus, the Pd@PI nanofiber catalyst holds great potential in chemical industry in terms of its excellent catalytic activity and stability.

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Section: Resultsmentioning

confidence: 99%

Palladium nanoparticles encapsulated in polyimide nanofibers: An efficient and recyclable catalyst for coupling reaction

Gou

Gao

et al. 2021

Applied Organom Chemis

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“…Baran et al also used the same procedure with agar [81] and guar gum [104], for which they obtained agar/guar gum-Schiff-base-supported palladium catalysts in three steps. The new catalysts were successfully used in 23 different reactions under microwave irradiation, and the yields obtained ranged from 53% to 99% with agar, i.e., AG-Pd [81], and from 33% to 98% with guar gum, GG-Pd [104]. The catalyst was reused in 10 successive runs, and negligible leaching of palladium ions from the AG-Pd catalyst was observed.…”

Section: Immobilization Of Palladium Via a Schiff-basementioning

confidence: 99%

“…Starch Schiff-base-supported palladium catalyst preparation. Adapted from ref [104]. with permission from John Wiley Sons.…”

mentioning

confidence: 99%

Recent Developments in the Immobilization of Palladium Complexes on Renewable Polysaccharides for Suzuki–Miyaura Cross-Coupling of Halobenzenes and Phenylboronic Acids

Wolfson

Levy‐Ontman

2020

Catalysts

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Polysaccharides derived from natural sources exhibit unique structures and functional groups, which have recently garnered them increased attention for their potential applicability as supports for metal catalysts. Renewable polysaccharide matrices were employed as supports for palladium complexes, with or without previous modification of the support, and were used in Suzuki cross-coupling of halobenzenes and phenylboronic acid derivatives. In this review, recent developments in the immobilization of palladium-based complexes are reported, including descriptions of the preparation procedures and catalytic activity of each system. In addition, the effects of the nature of the polymeric support and of the reaction conditions on catalytic performance are discussed.

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“…Baran et al devised a highly efficient heterogeneous Pd catalyst prepared using guar gum (GG), a natural biopolymer [53]. The catalytic studies showed that GG-Pd is a very active catalyst for Suzuki cross-coupling reactions under solvent-free media without any additives.…”

Section: Solvent-freementioning

confidence: 99%

New Trends in C–C Cross-Coupling Reactions: The Use of Unconventional Conditions

Andrade

Martins

2020

Molecules

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The ever-growing interest in the cross-coupling reaction and its applications has increased exponentially in the last decade, owing to its efficiency and effectiveness. Transition metal-mediated cross-couplings reactions, such as Suzuki–Miyaura, Sonogashira, Heck, and others, are powerful tools for carbon–carbon bond formations and have become truly fundamental routes in catalysis, among other fields. Various greener strategies have emerged in recent years, given the widespread popularity of these important reactions. The present review comprises literature from 2015 onward covering the implementation of unconventional methodologies in carbon–carbon (C–C) cross-coupling reactions that embodies a variety of strategies, from the use of alternative energy sources to solvent- free and green media protocols.

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Highly active and recyclable heterogeneous palladium catalyst derived from guar gum for fabrication of biaryl compounds

Cited by 43 publications

References 65 publications

Palladium nanoparticles encapsulated in polyimide nanofibers: An efficient and recyclable catalyst for coupling reaction

Palladium nanoparticles encapsulated in polyimide nanofibers: An efficient and recyclable catalyst for coupling reaction

Recent Developments in the Immobilization of Palladium Complexes on Renewable Polysaccharides for Suzuki–Miyaura Cross-Coupling of Halobenzenes and Phenylboronic Acids

New Trends in C–C Cross-Coupling Reactions: The Use of Unconventional Conditions

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