scholarly journals C–H arylations of 1,2,3-triazoles by reusable heterogeneous palladium catalysts in biomass-derived γ-valerolactone

2016 ◽  
Vol 52 (63) ◽  
pp. 9777-9780 ◽  
Author(s):  
Xu Tian ◽  
Fanzhi Yang ◽  
Dace Rasina ◽  
Michaela Bauer ◽  
Svenja Warratz ◽  
...  
Keyword(s):  
Palladium Catalyst ◽  
Palladium Catalysts ◽  
Reaction Medium ◽  
Environmentally Benign ◽  
User Friendly ◽  
Heterogeneous Palladium Catalyst

C–H arylations were accomplished with a user-friendly heterogeneous palladium catalyst in the biomass-derived γ-valerolactone (GVL) as an environmentally-benign reaction medium.

Heterogeneous C–H alkenylations in continuous-flow: oxidative palladium-catalysis in a biomass-derived reaction medium

2017 ◽  
Vol 19 (11) ◽  
pp. 2510-2514 ◽  
Author(s):  
Francesco Ferlin ◽  
Stefano Santoro ◽  
Lutz Ackermann ◽  
Luigi Vaccaro
Keyword(s):  
Palladium Catalyst ◽  
Continuous Flow ◽  
Palladium Catalysis ◽  
Reaction Medium ◽  
Heterogeneous Palladium Catalyst

Herein we report the unprecedented Fujiwara–Moritani reaction catalysed by the commercially available heterogeneous palladium catalyst Pd/C.

Synthesis of heterogeneous palladium catalyst assemblies by molecular imprinting

2001 ◽  
pp. 2588-2589 ◽  
Author(s):  
Andrew N. Cammidge ◽  
Nicholas J. Baines ◽  
Richard K. Bellingham
Keyword(s):  
Molecular Imprinting ◽  
Palladium Catalyst ◽  
Heterogeneous Palladium Catalyst

Pyridinyl functionalized MCM-48 supported highly active heterogeneous palladium catalyst for cross-coupling reactions

RSC Advances ◽  
2015 ◽  
Vol 5 (25) ◽  
pp. 19630-19637 ◽  
Author(s):  
Shaheen M. Sarkar ◽  
Md. Lutfor Rahman ◽  
Mashitah Mohd Yusoff
Keyword(s):  
Palladium Catalyst ◽  
Cross Coupling ◽  
Significant Loss ◽  
Pd Catalyst ◽  
Coupling Reactions ◽  
Cross Coupling Reactions ◽  
Highly Active ◽  
Supported Pd ◽  
Heterogeneous Palladium Catalyst

Pyridinyl functionalized MCM-48-supported Pd-catalyst efficiently (0.013–0.025 mol%) promoted Heck, Suzuki and Sonogashira cross-coupling reactions. Moreover, the catalyst was reused five times without significant loss of its activity.

scholarly journals Cu(II) and magnetite nanoparticles decorated melamine-functionalized chitosan: A synergistic multifunctional catalyst for sustainable cascade oxidation of benzyl alcohols/Knoevenagel condensation

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Zahra Alirezvani ◽  
Mohammad G. Dekamin ◽  
Ehsan Valiey
Keyword(s):  
Catalytic Activity ◽  
Knoevenagel Condensation ◽  
Ambient Pressure ◽  
Reaction Medium ◽  
Environmentally Benign ◽  
One Pot ◽  
Benzyl Alcohols ◽  
External Magnet ◽  
Multistep Synthesis ◽  
Multifunctional Catalyst

AbstractThe uniform decoration of Cu(II) species and magnetic nanoparticles on the melamine-functionalized chitosan afforded a new supramolecular biopolymeric nanocomposite (Cs-Pr-Me-Cu(II)-Fe3O4). The morphology, structure, and catalytic activity of the Cs-Pr-Me-Cu(II)-Fe3O4 nanocomposite have been systematically investigated. It was found that Cs-Pr-Me-Cu(II)-Fe3O4 nanocomposite can smoothly promote environmentally benign oxidation of different benzyl alcohol derivatives by tert-butyl hydroperoxide (TBHP) to their corresponding benzaldehydes and subsequent Knoevenagel condensation with malononitrile, as a multifunctional catalyst. Interestingly, Fe3O4 nanoparticles enhance the catalytic activity of Cu(II) species. The corresponding benzylidenemalononitriles were formed in high to excellent yields at ambient pressure and temperature. The heterogeneous Cs-Pr-Me-Cu(II)-Fe3O4 catalyst was also very stable with almost no leaching of the Cu(II) species into the reaction medium and could be easily recovered by an external magnet. The recycled Cs-Pr-Me-Cu(II)-Fe3O4 was reused at least four times with slight loss of its activity. This is a successful example of the combination of chemo- and bio-drived materials catalysis for mimicing biocatalysis as well as sustainable and one pot multistep synthesis.

Ionic liquid promoted and mediated green preparation of arylbispyranylmethane and pyran derivatives and their hybrid with a pyrimidine nucleoside

2009 ◽  
Vol 2009 (8) ◽  
pp. 473-477 ◽  
Author(s):  
Xinying Zhang ◽  
Yingying Qu ◽  
Xuesen Fan ◽  
Xia Wang ◽  
Jianji Wang
Keyword(s):  
Ionic Liquid ◽  
High Efficiency ◽  
Reaction Medium ◽  
Environmentally Benign ◽  
Pyrimidine Nucleoside ◽  
Reaction Conditions ◽  
Operation Process ◽  
Antiviral Activities ◽  
Benign Nature ◽  
High Yields

The utilisation of an ionic liquid-[bmim][BF4] as both reaction medium and promoter for the reaction between aldehyde and 4-hydroxy-6-methylpyran-2-one is described. Without any added catalyst, this reaction was realised efficiently to give arylbispyranylmethane derivatives in high yields. Alternatively, when this reaction was carried out in the presence of acetic anhydride, fused pyran derivatives were obtained. These two novel procedures have advantages such as an environmentally benign nature, high efficiency, simple operation process and mild reaction conditions. As an application, these procedures were used in the preparation of novel 5-substituted pyrimidine nucleoside derivatives with potential antiviral activities.

scholarly journals Polyethyleneimine-Modified Polymer as an Efficient Palladium Scavenger and Effective Catalyst Support for a Functional Heterogeneous Palladium Catalyst

ACS Omega ◽  
2019 ◽  
Vol 4 (6) ◽  
pp. 10243-10251 ◽  
Author(s):  
Tsuyoshi Yamada ◽  
Yutaka Kobayashi ◽  
Naoya Ito ◽  
Tomohiro Ichikawa ◽  
Kwihwan Park ◽  
...  
Keyword(s):  
Palladium Catalyst ◽  
Catalyst Support ◽  
Effective Catalyst ◽  
Modified Polymer ◽  
Heterogeneous Palladium Catalyst
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