Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"trifluoroethanol"”.
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A novel route to fluoroarenes from trifluoroethanol
… chloride were prepared from trifluoroethanol at near ambient temperature and underwent Negishi coupling with a range of aryl-halides. A co-solvent (N,N-dimethylpropylene urea) was necessary to generate 2,2-difluoro-1-(2'-methoxy-ethoxymethoxy)-1-zinc chloride in good yield. …
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Ultrahigh vacuum studies of the boundary lubrication of metals
… chlorine, iodine) and molecular (ethanol, trifluoroethanol, butanol, and heptafluorobutanol) species as a function of coverage. The friction behavior of clean Cu(111) surfaces was characterized by stick-slip sliding behavior and high static friction coefficients.
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The interaction of some halogenated anaesthetic agents with hepatic drug metabolizing enzymes
… of potentially toxic metabolites, 2,2,2-trifluoroethanol (TFE) (from fluroxene and TFEE) and free fluoride ion (from methoxyflurane and enflurane).
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Nuclear Magnetic Resonance Under Extreme Conditions: High-Pressure NMR Probe Development, and NMR Applications to the Dynamics of Confined Liquids
… perfonned on the polar fluids ethanol, 2,2,2-trifluoroethanol, propionic acid, and pentafluoropropionic acid confined to porous silica glasses with well-defined pore sizes. The $\sp{13}$C NMR spin-lattice relaxation times were measured and analyzed in terms of the two-state-fast exchange …
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Shape Selective Oxidations of Hydrocarbons
… state. Both tert-butylhydroperoxide and trifluoroethanol solubilized pentafluoroiodosobenzene were found not to be shape selective with manganese porphyrin catalysts indicating radical chain oxidation.
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Resonance Two Photon Ionization Study of Binary Clusters of Styrene with Polar Molecules
… intracluster reaction was observed for styrene-trifluoroethanol (STn) system. In order to provide a comparison between the styrene and benzene systems, the benzene-ethanol (BEn) and benzene-trifluoroethanol (BTn) clusters were studied by using the R2PI technique via the 6¹0 transition of the …
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Mechanistic and synthetic studies of the intramolecular [4+2] cycloaddition of conjugated enynes
… has shown that alcohols, in particular 2,2,2-trifluoroethanol, can significantly improve the isolated yield of products. The application of strained cyclic acetylenes, specifically arynes generated by a modification of the Kobayashi protocol with tetrabutylammonium triphenyldifluorosilicate …
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Development of decarboxylative strategies towards the synthesis of fluorinated pharmacons
… ketones, difluoromethyl ketones, and trifluoroethanols, have emerged as desirable motifs in medicinal chemistry for the fine tuning of pharmacokinetic properties. Over the past few decades, fluoro(oxo) diversity has been accessed through oxidation state manipulations from the parent …
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Synthesis of indolines and indoles via intramolecular [4 + 2] cycloaddition of ynamides and conjugated enynes ; Synthesis of nitrogen heterocycles in supercritical carbon dioxide
… the substrates at 110-210⁰C in toluene or 2,2,2- trifluoroethanol and in some cases can be achieved at 0⁰C to room temperature in the presence of Lewis acids such as Me₂A1C1.
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Multinuclear magnetic resonance studies of proteins
… lysozyme in denaturants of guanidine chloride, trifluoroethanol, urea and under thermal conditions. Our study is not limited to the experimental approaches. We first discussed what was the main factor that contributed to the fluorine chemical shifts in proteins based on recent new results. Pros …
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The development of novel organocatalytic and transition-metal catalysed methodologies for amide bond formation
… the Jamieson group, one such approach is the trifluoroethanol-catalysed amidation of unactivated ester derivatives. However, in the initial studies, the general applicability of this methodology was limited by the incompatibility of acyclic secondary amines under the reaction manifold, and …
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Determination of descriptors by liquid-liquid partition and chromatographic methods
… selectivity groups with four solvents (2,2,2-trifluoroethanol, N,N-dimethylformaide, dimethyl sulfoxide and water) behaving independently. The classification scheme provides a logical approach for solvent selection as the first step in chromatographic method development. A similar approach for …
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Effects of long-chain surfactants, short-chain alcohols and hydrolyzable cations on the Hydrophobic and Hydration Forces
… (DOAHCl), octanol, methanol, ethanol, trifluoroethanol (TFE), pyridine, CaCl2, MgCl2 and sodium oleate were studied. A Mark IV SFA was used to conduct force measurements between mica surfaces in aqueous solutions of DOAHCl, which is a secondary amine. At 7x10-6M DOAHCl, the mica …
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Experimental Studies on Nucleation, Nanoparticle's Formation and Polymerization from the Vapor Phase
This research is divided into three major parts. In part I, the critical supersaturations required for the homogeneous nucleation of 2,2,2-trifluorothanol (TFE) vapor have been measured over a temperature range (266-296 K) using an upward thermal diffusion cloud chamber (DCC). The measured …