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Showing 1 to 17 of 17 for “"unsaturated aldehydes"”.
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Intramolecular (4+2) -Cycloadditions of Three Heterodienes: Nitrosoalkenes, Nitroalkenes, and Z-Alpha,beta-Unsaturated Aldehydes
… nitroalkenes, and Z -$\alpha,\beta$-unsaturated aldehydes as the 4$\pi$-components are discussed. Nitrosoalkenes, generated in situ from the corresponding $\alpha$-chloroketone silyloximes, engaged in intramolecular cycloadditions with enol ethers and vinyl sulfides at ambient …
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Selective hydrogenation of α,β[alpha,beta]-unsaturated aldehydes towards clean synthesis over noble metal catalysts in mass transfer efficient three phase reactors
… a catalytic reactor for the hydrogenation of α,β-unsaturated aldehydes. Oxygen/water was used as the system throughout. In order to obtain reproducible results, a very effective gas-liquid separation method was conceived and developed after much trial and error work. Shutdown and deadleg gas …
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Synthesis of Heterometallic nitridoruthenium(VI) Complexes With Nickel, Palladium, or Platinum: New Catalysts for the Aerobic Oxidation of Alcohols
… aryl and allyl alcohols to their corresponding aldehydes. The complex also catalytically rearranges allylic alcohols to their corresponding unsaturated aldehydes. The mechanism of oxidation for [PPh4][Ru(N)Me(mu2-O)2Pd((-)-sparteine)] closely mirrors that of the previously described …
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Vinylcyclopropanation of enones in [2+3] cyclopentene annulation: application to the total synthesis of (-)-retigeranic acid
… with other electrophiles such as ketones, α,ß-unsaturated esters and α,ß-unsaturated aldehydes were also investigated. The possibility of asymmetric induction utilizing (-)-menthyl 2-bromocrotonate (169) was briefly investigated. An application of this methodology was expressed in the total …
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Identification and Quantification of Protein Carbonylation by Mass Spectrometry
… and aconitase (ACO), by the LPO-relevant a, b-unsaturated aldehydes, acrolein (ACR) and 4-hydroxy-2-nonenal (HNE). The investigation is focused on the characterization and quantification ACR and HNE addition to the model proteins. A correlation between HNE modification and ACO activity is also …
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Nematicidal, antimicrobial and acaricidal activity of plant secondary metabolites
… metabolites such as α, β- and α, β, γ, δ- unsaturated aldehydes, isothiocyanates and polyphenols as potential nematicidal against the root knot nematode Meloidogyne spp. We deal also about the possible mode of action of aromatic aldehydes by the inhibition of V-ATPase of the nematode. …
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Cross-Coupling Chemistry as a Tool for the Synthesis of Diverse Heterocyclic Systems and Natural Products
… Cyclization of o-Nitroarylated-alpha,beta-Unsaturated Aldehydes and Ketones with TiCl3/HCl or Fe/HCl Leading to 1,2,3,9-Tetrahydro-4H-carbazol-4-ones and Related Heterocycles'. The fourth publication has the title 'Synthesis of a Highly Functionalised and Homochiral 2-Iodocyclohexenone …
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Cross-Coupling Chemistry as a Tool for the Synthesis of Diverse Heterocyclic Systems and Natural Products
… Cyclization of o-Nitroarylated-alpha,beta-Unsaturated Aldehydes and Ketones with TiCl3/HCl or Fe/HCl Leading to 1,2,3,9-Tetrahydro-4H-carbazol-4-ones and Related Heterocycles'. The fourth publication has the title 'Synthesis of a Highly Functionalised and Homochiral 2-Iodocyclohexenone …
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Understanding Heterogenous Catalysis on Zeolites and Manganese Oxides
… and selective in the hydrogenation of α, β unsaturated aldehydes. In this thesis, using density functional theory (DFT) and Molecular Dynamics (MD), we conducted numerous studies aiming to understand heterogenous catalytic reactions over zeolites and two different octahedral manganese …
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Iridium Complexes for Intracellular Transfer Hydrogenation and Their Potential Biological Applications
… hydride transfer from either NADH or formate to aldehydes in PBS buffer and cell culture media. These iridium catalysts are tolerant of moderate concentrations of biological nucleophiles, including thiols such as glutathione and cysteine. To design more efficient catalysts for intracellular …
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Contributions to benzothiopyran chemistry
… the cyclocondensation of a thiophenol with cz,13-unsaturated carboxylic acids in methanesuiphonic acid and selectively oxidised to their 1-oxides and 1,1-dioxides. Reduction and dehydration of the resulting benzothiopyran-4-ols gave the 2H-[1]benzothiopyrans and their 1-oxides and 1,1-dioxides, …
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The Development of a Fragment-Based in silico Profiler for the Prediction of Thiol Reactivity and Toxicity
… outlines the development of the approach for α,β-unsaturated aldehydes, ketones and esters which form covalent bonds through Michael addition. Chapter 4 extends the work outlined in Chapter 3 demonstrating how the fragment-based profiler can be used to predict both chemical reactivity and skin …
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Designing and optimizing tandem bio- and chemo-catalyzed cascade reactions to access industrially relevant chemicals in mild, aqueous conditions
… converting short chain primary alcohols to α,β-unsaturated aldehydes in aqueous conditions. Alcohol substrates are oxidized to the corresponding aldehyde by the biocatalyst, whole cell Gluconobacter oxidans (G. oxidans), followed by an organocatalyzed aldol addition-condensation reaction to …
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I. Progress Toward Leiodelide A II. Palladium-Catalyzed Reactions of Enol Ethers
… via an Evans aldol reaction, while the ¿¿,¿¿-unsaturated ester is installed via a Horner-Wadsworth-Emmons olefination.</p><p>The southern and northern hemispheres have been coupled to the oxazole portion of the molecule. The coupling strategy utilized methodology developed by our laboratory to …
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Oxidation of Disinfection Byproducts and Algae-related Odorants by UV/H₂O₂
… The aqueous oxidation of odorous aldehydes and halogenated DPBs were compared to that of the earthy-musty odorants and the changes to the sensory properties of the drinking water were examined. Geosmin, 2-methylisoborneol, heptadienal, decadienal, and nonadienal, hexanal, and the …
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INNOVATIVE SYSTEMS FOR THE MITIGATION OF RISKS: CATALYSTS AND SMART MATERIALS FOR DETECTION AND DECONTAMINATION OF HAZARDOUS CHEMICAL, BIOLOGICAL AND EXPLOSIVE SUBSTANCES
… principles, particularly linear aliphatic aldehydes, or exchanged with copper(II), aiming to obtain materials with a slow release of these active ingredients. Extremely promising results were achieved in open-field trials, showcasing significant reductions in both fly infestation (up to a …
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Role of adsorption in catalysis: applications of NMR relaxometry
… was performed with a series of C5 and C6 unsaturated hydrocarbons on two different alumina supports, γ- and θ-Al2O3. The developed techniques were applied in the study of liquid phase selective hydrogenation of citral on 5% Pt/SiO2. Infrared (IR) spectroscopy, volumetric adsorption …