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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 20 of 123 for “"tetrahydrofuran"”.
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Sensitivity of tetrahydrofuran hydrate and methane hydrate equilibria to porous media
Includes bibliographical references (pages 98-103).
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Formation of 2,5-trans-tetrahydrofuran-3-one application towards the synthesis of natural products
The tetrahydrofuran backbone is one of the most common heterocyclic units found in natural products. Among them structurally complex substituted tetrahydrofuran rings which present a 2,5-trans stereochemistry have been of particular interest to many groups as polyether antibiotics and highly …
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I The tandem chain extension-acylation reaction II Synthesis of papyracillic acid A: Application of the tandem homologation-acylation reaction III Synthesis of tetrahydrofuran-based peptidomimetics
… cyclization, allowed for the synthesis of tetrahydrofuran-based peptidomimetics. A variety of amino acid derived beta-keto imides and aldehydes were used during the initial tandem homologation-aldol reaction. High diastereocontrol was achieved during reductive cyclization when a cis …
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The inclusivity of ice.
… acetate; as well as the volatile molecule, tetrahydrofuran. In Chapter Three and Four, it was experimentally determined that there was not only the ejection of large concentrations of salt solutes but also the preferential uptake of anions over cations in ice. This was found to be in …
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1,2-naphthoquinone mono-oximato complexes of ruthenium
… with hydrated ruthenium(III) chloride in aqueous tetrahydrofuran.
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Effect of intermediate solvents on poly(ether ether ketone)
… and three solvents (i.e., methylene chloride, tetrahydrofuran, and acetone) was studied by means of several complementary techniques. A series of eleven 0.3 mm thick PEEK films was produced. Each film had a certain crystallinity index and crystal morphology, as revealed by optical microscopy, …
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Shock Tube and Mid-IR Laser Absorption Study of Combustion Kinetics
… studied are furans (2-methyl furan and 2-methyl tetrahydrofuran), alcohols (propanol isomers), and other relevant oxygenated fuels (methyl tert-butyl ether, methyl propanoate). The fossil fuel components are 1,3-dimethylcyclohexane and methane. Methane and methyl propanoate blends are studied to …
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Computer simulations of Fréchet dendrimers in solutions
… water (representatives of poor solvents), and tetrahydrofuran (THF) and chloroform (representatives of good solvents). To establish the quality of the solvent on the conformation of the dendrimer, additional nanosecond MD simulations fo the dendrimers are performed, from both inititally folded …
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Synthesis of Non-Steroidal Estrogen Receptor Proteolysis Targeting Chimeric Molecules (Protacs)
… by the VCB E3 ligase. The synthesis of a tetrahydrofuran-based hydroxyproline analog was attempted with encouraging results. Upon completion of the synthesis, this analog can be attached to an ER ligand in place of the HIF-1alpha destruction sequence and tested as the first non-peptide …
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The synthesis of 10-(4-hydroxymethylphenyl)-1,2-Benzanthracene
… was prepared by the use or tetrahydrofuran and "entrainment" with methyl iodide.
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The polymerization of lactic acid anhydrosulphite by anionic initiators
… tert-butoxide (and also sec-butyl lithium) in tetrahydrofuran has been studied using calorimetric techniques. LAAS was block co-polymerized with styrene and also with 1,3-butadiene in tetrahydrofuran (in the latter case a statistical co-polymer was also produced).
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Total Synthesis of Lasionectrin and Synthetic Studies Towards Pestaloxazine A
… derivative which contains a fused pyrone-tetrahydrofuran ring system. Several synthetic strategies were explored to prepare the carbon skeleton of lasionectrin (13). Our initial approach which hinged on formation of the fused bicycle in a single step using chiral hypervalent iodine was …
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The synthesis and polymerization of dicycloproparenes
… (4) with potassium t-butoxide in tetrahydrofuran.* The silver catalyzed polymerization of each dicycloproparene was investigated. The dimers 5a and 5b were observed and isolated at an early stage during the polymerization of dicycloproparene 1.* The ladder polymer formed by …
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Selective criteria in Werner clathrates
… [Ni(NCS)2(4-ViPy)4]. The guests are mixtures of tetrahydrofuran and the cyclic hydrocarbons: cyclohexane, cyclohexene, 1,3-cYclohexadiene, 1,4-cyclohexadiene and benzene. Host to guest ratios were elucidated by density and proton nuclear magnetic resonance spectroscopy. The thermal …
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Studies toward the total syntheses of tamulamides A and B
… the EFG fragment have been achieved. The fused tetrahydrofuran triad core of the ABC fragment has been synthesized via a base-mediated diepoxide cascade. The challenging 6,7,6 framework of the EFG fragment has been achieved through an intramolecular reductive cyclization reaction. With …
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Identifying interface-dominated behavior and cell configuration effects on the electrochemistry of calcium foil anodes
… in a current benchmark electrolyte, Ca(BH₄)₂ in tetrahydrofuran (THF). Preparation methodologies of Ca foils are presented, along with Ca plating/stripping through either pre-existing, native calcium hydride (CaH₂), or pre-formed calcium fluoride (CaF₂) interfaces.
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Part 1. Diaziridinium Ions: First Reported Synthesis and Reactivity Studies. Part 2. Tropylium Ion Mediated alpha-Cyanation of Amines. Part 3. Multicatalytic Synthesis of Complex Tetrahydrofurans
… to generate highly functionalized tetrahydrofuran rings, a motif that is often encountered in natural product architectures.
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Reaction calorimetry applied to kinetic problems. The design and construction of an isothermal calorimeter with heat compensation by the Peltier effect, and the application of the calorimeter in the study of reaction kinetics in solvent/water mixtures.
… of methyl acetate in dimethylsulphoxide, and tetrahydrofuran - water mixtures at 15, 25 and 35 [degrees]C. The results of other investigations on similar reactions have been reviewed and an attempt has been made to correlate the electrostatic theories of Laidler and Eyring, and Amis and jaffe …
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Total electron scattering cross sections of molecules containing H, B, C, N, O, F, Si, P, S, and Cl in the energy range 0.1- 6.0 keV.
… and uracil) , Phosphoric acid, sugar substitute (Tetrahydrofuran, Furan, Tetrahydropyran, 3-hydroxytetrahydrofuran, D-Glucose, and alpha-D-glucose), and simple amino acids (Glycine, Lysine and L-histidine) in the energy range 0.1-6.0 keV are predicted using the model. The reliability of these …
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