Phosphine-Functionalized Chitosan Microparticles as Support Materials for Palladium Nanoparticles in Heck Reactions

Souza, Jaqueline F. de; Lemos, Thalia S.A.; Biajoli, André F. P.; Fajardo, André R.

doi:10.1007/s10562-021-03914-z

Cited by 5 publications

(2 citation statements)

References 50 publications

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“…4,5 In order to solve these problems, homogeneous palladium catalysts have been deposited on suitable solid matrices to facilitate their separation, recovery and reuse. [6][7][8] For example, palladium on carbon (Pd/C) catalyst is one of the most favorable commercialized heterogeneous palladium catalysts and widely used in various chemical transformations. 2 However, it is still a significant challenge to explore the solution for the deactivation of Pd/C catalyst upon successive reuses due to the palladium leaching.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the residues of toxic palladium metals and ligands in the final products limit their applications in many fields, such as pharmaceuticals, food additives, cosmetics, and so on 4,5 . In order to solve these problems, homogeneous palladium catalysts have been deposited on suitable solid matrices to facilitate their separation, recovery and reuse 6–8 . For example, palladium on carbon (Pd/C) catalyst is one of the most favorable commercialized heterogeneous palladium catalysts and widely used in various chemical transformations 2 .…”

Section: Introductionmentioning

confidence: 99%

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Pd/C embedded crosslinked polystyrene fibers as an efficient catalyst for Heck reactions

Xie

Peng

Luo

et al. 2022

J of Applied Polymer Sci

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Pd/C embedded polystyrene fibers were successfully prepared by electrospinning. The polystyrene molecules were then cross‐linked by paraformaldehyde in sulfuric acid to improve the solvent resistance of composite fibers. SEM images conformed the preparation of uniform and smooth composite fibers. FT‐IR spectra demonstrated that the polystyrene molecules inside fibers have been sulphonated and crosslinked. Heck reactions were used to evaluate the catalytic performance of these novel composite fibers. The catalysis results show that this composite fiber mat catalyzed Heck reactions could be evidently promoted by using preferred reducing alcohol agent and solvent. Under the optimized reaction conditions, this composite fiber mat could effectively catalyze the Heck reactions of aromatic iodides with n‐butyl acrylate to afford the products with satisfied yields. Especially, compared with the particulate Pd/C catalyst, the separation and recycling of this fibrous catalyst from the reaction mixture were significantly improved due to the larger fibrous structure. At last, this fiber catalyst was successfully reused for eight times with little loss of initial catalytic activity, which was even better than the pristine Pd/C catalyst. Hence, embedment of particulate supported metal catalysts inside the crosslinked polystyrene fibers can effectively improve their catalytic performance and handiness.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pd/C embedded crosslinked polystyrene fibers as an efficient catalyst for Heck reactions

Xie

Peng

Luo

et al. 2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

Artificial Arthropod Exoskeletons/Fungi Cell Walls Integrating Metal and Biocatalysts for Heterogeneous Synergistic Catalysis of Asymmetric Cascade Transformations

et al. 2023

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A novel and sustainable tandem‐catalysis system for asymmetric synthesis is disclosed, which is fabricated by bio‐inspired self‐assembly of artificial arthropod exoskeletons (AAEs) or artificial fungi cell walls (AFCWs) containing two different types of catalysts (enzyme and metal nanoparticles). The heterogeneous integrated enzyme/metal nanoparticle AAE/AFCW systems, which contain chitosan as the main structural component, co‐catalyze dynamic kinetic resolution of primary amines via a tandem racemization/enantioselective amidation reaction process to give the corresponding amides in high yields and excellent ee. The heterogeneous AAE/AFCW systems display successful heterogeneous synergistic catalysis at the surfaces since they can catalyze multiple reaction cycles without metal leaching. The use of natural‐based and biocompatible structural components makes the AAE/AFCW systems fully biodegradable and renewable, thus fulfilling important green chemistry requirements.

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Alginate/Phosphine-Functionalized Chitosan Beads Towards the Removal of Harmful Metal Ions from Aqueous Medium

et al. 2022

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Phosphine-Functionalized Chitosan Microparticles as Support Materials for Palladium Nanoparticles in Heck Reactions

Cited by 5 publications

References 50 publications

Pd/C embedded crosslinked polystyrene fibers as an efficient catalyst for Heck reactions

Pd/C embedded crosslinked polystyrene fibers as an efficient catalyst for Heck reactions

Artificial Arthropod Exoskeletons/Fungi Cell Walls Integrating Metal and Biocatalysts for Heterogeneous Synergistic Catalysis of Asymmetric Cascade Transformations

Alginate/Phosphine-Functionalized Chitosan Beads Towards the Removal of Harmful Metal Ions from Aqueous Medium

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