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Dissertation
Synthesis and catalytic applications of novel Palladium PEPPSI complexes
Authors: --- --- --- ---
Year: 2023 Publisher: Liège Université de Liège (ULiège)

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Abstract

In this work, a series of novel Pd PEPPSI complexes bearing symmetrical and unsym¬metrical NHC ligands were synthesized and fully characterized using 1H and 13C NMR spectroscopies. The crystallographic structures of three complexes were also determined using single crystal X-ray diffraction analysis. The catalytic activity of six out of the ten complexes obtained was assessed toward the Suzuki-Miyaura cross-coupling and the Heck reaction of aryl bromides with phenylboronic acid and styrene, respectively. All the complexes led to high yields of biphenyl derivatives with all the substrates tested in the Suzuki-Miyaura cross-coupling whether they bore electron-donating or electron-withdrawing substituents. They also gave excellent results for the coupling of aryl bromides bearing electron-withdrawing groups with styrene in the Heck reaction, but failed to efficiently couple an aryl bromide bearing a 4 methoxy electron-donating group with styrene.


Book
Transition Metal Catalyzed Cross-Coupling Reactions
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Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Transition metal-catalyzed cross-coupling reactions have proved to be powerful tools for carbon–carbon as well as carbon–heteroatom bond formation in the development of synthetic methodologies for applications ranging from pharmaceuticals to materials. This book, consisting of an editorial, two reviews and two articles, focuses on recent promising research and novel trends in the field of cross-coupling reactions, employing a range of different catalysts. A review by Kostas and Steele provides a survey of the research in the area of cross-coupling catalytic reactions with transition metal complexes based on the thiosemicarbazone unit and a discussion of the prospects for future developments. Another review by Polychronopoulou, Shaya and co-authors describes the progress made over the 21st century concerning the utilization of C(sp3)–organoboranes as partners in metal-catalyzed C(sp3)–C(sp2) cross-couplings, such as B-alkyl Suzuki–Miyaura reactions. The article by Waldvogel, Breinbauer and co-authors demonstrates for the first time the synthetic potential of combining the electro-oxidative dehydrogenative cross coupling of ortho-substituted phenols with Pd-catalyzed cross-coupling reactions. In the second article, Štĕpnička and co-workers describe the preparation of palladium catalysts deposited over silica gel-bearing composite amide-donor functional moieties on the surface, which were evaluated in the Sonogashira-type cross-coupling of acyl chlorides with terminal alkynes.


Book
From Natural Polyphenols to Synthetic Bioactive Analogues
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Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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This Special Issue is focused on natural polyphenols and their synthetic bioactive analogues. It is composed of one review on aza- and azo-stilbenes as bioisosteric analogs of the stilbenoid resveratrol and four original articles, including studies on synthetic (bisphenol neolignans inspired by honokiol, multicomponent synthesis of polyphenols), and natural polyphenols (polyphenols from Tamarix ramosissima and Melanoleuca styphelioides) as antiproliferative, anti-Alzheimer’s, antioxidant, antimicrobial, or anti-inflammatory agents.


Book
From Natural Polyphenols to Synthetic Bioactive Analogues
Author:
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

This Special Issue is focused on natural polyphenols and their synthetic bioactive analogues. It is composed of one review on aza- and azo-stilbenes as bioisosteric analogs of the stilbenoid resveratrol and four original articles, including studies on synthetic (bisphenol neolignans inspired by honokiol, multicomponent synthesis of polyphenols), and natural polyphenols (polyphenols from Tamarix ramosissima and Melanoleuca styphelioides) as antiproliferative, anti-Alzheimer’s, antioxidant, antimicrobial, or anti-inflammatory agents.


Book
Transition Metal Catalyzed Cross-Coupling Reactions
Author:
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

Transition metal-catalyzed cross-coupling reactions have proved to be powerful tools for carbon–carbon as well as carbon–heteroatom bond formation in the development of synthetic methodologies for applications ranging from pharmaceuticals to materials. This book, consisting of an editorial, two reviews and two articles, focuses on recent promising research and novel trends in the field of cross-coupling reactions, employing a range of different catalysts. A review by Kostas and Steele provides a survey of the research in the area of cross-coupling catalytic reactions with transition metal complexes based on the thiosemicarbazone unit and a discussion of the prospects for future developments. Another review by Polychronopoulou, Shaya and co-authors describes the progress made over the 21st century concerning the utilization of C(sp3)–organoboranes as partners in metal-catalyzed C(sp3)–C(sp2) cross-couplings, such as B-alkyl Suzuki–Miyaura reactions. The article by Waldvogel, Breinbauer and co-authors demonstrates for the first time the synthetic potential of combining the electro-oxidative dehydrogenative cross coupling of ortho-substituted phenols with Pd-catalyzed cross-coupling reactions. In the second article, Štĕpnička and co-workers describe the preparation of palladium catalysts deposited over silica gel-bearing composite amide-donor functional moieties on the surface, which were evaluated in the Sonogashira-type cross-coupling of acyl chlorides with terminal alkynes.


Book
Transition Metal Catalyzed Cross-Coupling Reactions
Author:
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

Transition metal-catalyzed cross-coupling reactions have proved to be powerful tools for carbon–carbon as well as carbon–heteroatom bond formation in the development of synthetic methodologies for applications ranging from pharmaceuticals to materials. This book, consisting of an editorial, two reviews and two articles, focuses on recent promising research and novel trends in the field of cross-coupling reactions, employing a range of different catalysts. A review by Kostas and Steele provides a survey of the research in the area of cross-coupling catalytic reactions with transition metal complexes based on the thiosemicarbazone unit and a discussion of the prospects for future developments. Another review by Polychronopoulou, Shaya and co-authors describes the progress made over the 21st century concerning the utilization of C(sp3)–organoboranes as partners in metal-catalyzed C(sp3)–C(sp2) cross-couplings, such as B-alkyl Suzuki–Miyaura reactions. The article by Waldvogel, Breinbauer and co-authors demonstrates for the first time the synthetic potential of combining the electro-oxidative dehydrogenative cross coupling of ortho-substituted phenols with Pd-catalyzed cross-coupling reactions. In the second article, Štĕpnička and co-workers describe the preparation of palladium catalysts deposited over silica gel-bearing composite amide-donor functional moieties on the surface, which were evaluated in the Sonogashira-type cross-coupling of acyl chlorides with terminal alkynes.


Book
From Natural Polyphenols to Synthetic Bioactive Analogues
Author:
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

This Special Issue is focused on natural polyphenols and their synthetic bioactive analogues. It is composed of one review on aza- and azo-stilbenes as bioisosteric analogs of the stilbenoid resveratrol and four original articles, including studies on synthetic (bisphenol neolignans inspired by honokiol, multicomponent synthesis of polyphenols), and natural polyphenols (polyphenols from Tamarix ramosissima and Melanoleuca styphelioides) as antiproliferative, anti-Alzheimer’s, antioxidant, antimicrobial, or anti-inflammatory agents.


Book
Design of Micro- and Nanoparticles: Self-Assembly and Application
Authors: ---
Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

Objects of nanotechnology such as micro- and nanoparticles are very interesting due to their unique properties. This reprint will be useful to scientists of diverse backgrounds, i.e., material science, organic and inorganic chemistry, biochemistry, and biology.

Keywords

Technology: general issues --- electropolymerization --- poly(Azure B) --- poly(proflavine) --- DNA sensor --- doxorubicin determination --- electrochemical impedance spectroscopy --- calix[4]arene --- NHC complex --- Suzuki–Miyaura coupling --- DPPC vesicles --- heparin/protamine particles --- hepatocyte --- intravenous injection --- lacZ protein --- nanoparticles --- protein delivery --- self-assembling --- antiviral agent --- nanoparticle --- coronavirus --- viral mechanism of entry --- antiviral mechanism --- therapeutic approaches --- SARS-CoV-2 --- COVID-19 --- polyol synthesis --- rhodium nanoparticles --- surfactants --- role of additives --- morphology control --- toxicity --- bio-imaging --- X-ray fluorescence --- contrast agent --- XFCT --- nanomaterials --- 2D nanostructures --- thiacalix[4]arene --- terpenoids --- geraniol --- X-ray crystal analysis --- 2D monomolecular-layer nanosheets --- polymorphism --- silica --- polystyrene --- maghemite supraparticles --- patchy particles --- seeded-growth emulsion polymerization --- solvent-induced self-assembly --- pillar[5]arene --- tetrazole --- drug delivery systems --- fluorescein --- ceria --- nanorods --- nanosheets --- nanozyme --- biomolecule --- template --- catalysis --- anti-oxidant --- oxygen radicals --- lithium iron phosphate --- hydrothermal synthesis --- heating rate --- morphology --- crystallinity and purity --- polyelectrolyte multilayers --- encapsulation --- calcium carbonate --- drug delivery --- shrinkage --- layered oxides --- perovskites --- bismuth titanates --- exfoliation --- coating --- silver nanoparticles --- AgNPs --- synthesis --- separation --- purification --- n/a --- Suzuki-Miyaura coupling


Book
Advances in Cross-Coupling Reactions
Authors: ---
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

In this Special Issue, recent advances in cross-coupling reactions are presented in the form of original research articles, reviews, and short communications. These contributions cover different topics in this area, including novel coupling reactions, reaction conditions, synthetic alternatives, metal ligands, and applications for new pharmaceutical compounds and organic materials. In particular, the reviews deal with methodologies such as the synthesis of diarylketones through palladium catalysis and the most relevant examples of Suzuki–Miyaura and Buchwald–Hartwig coupling reactions in the synthesis of bioactive compounds. The synthetic utility of cross-coupling reactions for the synthesis of medium-size rings and the utility of Stille and Suzuki coupling reactions for the synthesis of new molecular machines based on sterically hindered anthracenyl trypticenyl units are also summarized. The original research articles present the synthesis of 2-alkynylpyrrols by inverse Sonogashira coupling and the synthesis of indoles under oxidative dearomative cross-dehydrogenative conditions. The efficient combination of iridium-catalyzed C–H borylation of aryl halides with the Sonogashira coupling and a sequential iridium-catalyzed borylation of NH-free pyrroles followed by a Suzuki–Miyaura reaction are included. The synthesis of aryl propionic acids, a common structural motif in medicinal chemistry, and the synthesis of new organic dyes are also covered.


Book
Catalysis for Global Development. Contributions around the Iberoamerican Federation of Catalysis
Authors: ---
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

Adequate quality of life and well-being of modern societies is only achievable with sustainable manufacturing processes that efficiently use raw materials, eliminate waste, and avoid the use of hazardous materials. All this is hardly conceivable without catalysis. In a world concerned with the exploitation of natural resources, catalysis can offer direct synthesis routes that maximize resource efficiency. The Iberoamerican society is far too significant and far too involved in global development, owing to its natural richness of resources, not to have an essential role in current developments and future directions. Catalysis, in the Iberoamerican academic and industrial communities, is recognized as a relevant scientific discipline that supports several strategic industrial sectors through the manufacturing of products and materials, and the operationalization of processes to produce energy and other utilities. As a reflection of this, once every two years the Iberoamerican Congress on Catalysis takes place to share and discuss the state-of-the-art of this discipline with the Federation of Iberoamerican Catalysis Societies. This book collected sixteen outstanding contributions, stemming from this exceptional event—one which will undoubtedly mark a turning point and could be a source of inspiration to all those involved in catalysis, particularly the young generation of competent researchers taking their first steps in this incredibly complex and beautiful discipline.

Keywords

History of engineering & technology --- hydrodeoxygenation --- fast-pyrolysis bio-oil --- nickel catalyst --- upgrading --- peptide bond --- phthalonitriles --- phthalocyanines --- aminocarbonylation --- palladium catalysts --- castor oil --- biofuel --- selective transesterification --- ecodiesel --- biodiesel --- diesel engine --- electricity generator --- smoke opacity --- Bacharach opacity --- aldol condensation --- biomass valorization --- Mg/Al mixed oxides --- surfactant --- microwaves --- influence of water --- FAEEs --- mixed biocatalysts --- lipases --- microalgae --- silver nanoparticles --- zirconia --- hydrocarbons --- diesel soot --- catalytic combustion --- boronic esters --- borylation --- Suzuki–Miyaura --- layered double hydroxides --- copper --- palladium --- Fe/Nb2O5 immobilized catalyst --- emerging pollutants --- degradation --- hydrodesulfurization --- CoMo/Al2O3 --- basic additive --- lanthanum --- MCM-41 --- cerium --- benzyl alcohol --- oxidation --- benzaldehyde --- etherification --- glycerol --- tert-butyl alcohol --- dibutyl ether --- A-15 --- catalyst stability --- Cobalt ferrite --- ethylesters --- biofuels --- hydrotalcite --- transesterification --- fast pyrolysis --- SAPO-5 --- Al-MCM-41 --- dodecanoic acid --- photocatalysis --- Mg/Fe layered double hydroxides --- coprecipitation --- chlorophenols --- mixed oxides --- elimination --- phenol --- Al2O3-TiO2 --- CoMo --- CoMoS --- MoS2 --- desulfurization --- chemisorption --- MPI silica --- Ag nanoparticles --- XPS assessment --- n/a --- Suzuki-Miyaura

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