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 20 of 90 for “"Synthetic method"”.
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Bismuth-Ceramic Nanocomposites Through Ball Milling and Liquid Crystal Synthetic Methods
An additional synthetic method based on the infusion of ammonia gas to drive pH driven chemistries was also demonstrated for the synthesis of BiOCl and Bi nanoparticles.
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Discovery of Novel Tubulin Inhibitors and Selective Survivin Inhibitors for Advanced Melanoma and Total Synthesis of Bioactive 20S-hydroxyvitamin D3
… inhibitor from our lab. In this chapter, a new synthetic method was developed to enable the synthesis of ABI-231 analogues modifying the indole moiety. The novel synthetic method involved the synthesis of a key diamine intermediate and imidazoline formation. From the new synthetic method, thirty …
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I. Efforts Toward the Total Synthesis of the Stemofoline Alkaloids II. Preliminary Development of a Method to Prepare 1,2-Cis-2-Acetamido-2-Deoxyglycopyranoses
… the stemofoline alkaloids. Furthermore, a novel synthetic method to prepare alpha-linked C2-acetamido glycoconjugates is described and preliminary results are presented.
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Anisotropic Heterostructures of Nanocrystals
… yield and controlling of geometries by modifying synthetic method, new paradigm in designing photocatalysts may be envisioned with these materials.
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Studies on Organophosphorus Catalyzed C(SP³)–H Amination for the Synthesis of Benzimidazoles
… linear free energy relationship studies. The synthetic method and mechanistic information provide insight into design principles for the expansion of C(sp³)–H functionalization reactions through PIII/PV=O O-atom transfer reactivity.
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Development of Novel Synthetic Methods for Size-Tunable Synthesis of Superparamagnetic Iron Oxide Nanoparticles
… with excellent size control. A number of methods for the synthesis of magnetic nanoparticles have been published, although the thermal decomposition of iron(III) precursors in organic solvents has been shown to yield high quality particles with low shape and size dispersity. Currents …
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Synthesis And Characterization Of Transition Metal Arsenide Nanocrystals And The Metastability And Magneto-Structural Phase Transition Behavior Of Mnas Nanocrystals
… rapid injection); and (3) developing a general synthetic method for transition metal arsenide nanoparticles.</p> <p>Discrete MnAs nanoparticles that adopt different structures at room temperature (type-A, α-structure and type-B, β-structure) have been prepared by the solution-phase arrested …
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Brønsted acid-catalyzed stereoselective allylation of exo-glycals with allyltrimethylsilane
… as starting materials. The allylation methodologies of sugar lactol and sugar lactone starting materials suffer from poor regio- and stereoselectivity. Recently, we have developed a synthetic method for the allylation of exo-glycals using allyltrimethylsilane. This Brønsted …
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New Methods For The Synthesis Of Oxygen And Nitrogen Containing Heterocycles
A single synthetic method rarely is sufficient to provide universal access to a chemical structure class. This realization forces organic chemists to devise and develop new methods. The copper catalyzed ring expansion of vinylaziridines produces nitrogen containing heterocycles commonly found in …
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Single-Step Biofriendly Synthesis of Surface Modifiable, Near-Spherical Gold Nanoparticles for Applications in Biological Detection and Catalysis
… warrant reliable, viable, and biofriendly synthetic methodology for GNPs with homogeneous sizes and shapes, particularly sizes above 30 nm, which is currently challenging. In the present study, an environmentally benign, biofriendly, singlestep/ single-phase synthetic method using dextrose …
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Advancements in the diastereoselective synthesis of acyl pyrrolidines via the tandem aza-Cope—Mannich cyclization pathway
… We have demonstrated an improvement in our method yielding exclusively the <em>trans</em> isomers at ambient temperature with substoichiometric amounts of BF<sub>3</sub>•OEt<sub>2</sub> within 3 minutes. Catalyst loadings as low as 0.05 equivalents of BF<sub>3</sub>•OEt<sub>2</sub> initiate …
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I: Catalytic Direct C-H Arylation of Pyrazoles. II: Toward Modulation of Neuroplasticity with Small Molecules
… 1) describes the development of the first synthetic method for intermolecular palladium-catalyzed direct C-H arylation of N-substituted pyrazole compounds. The scope of the reaction and the ability to sequentially and selectively arylate specific positions on the azole core to rapidly …
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Thermodynamically Driven (Reversible) End-Capping of Pseudorotaxanes to Produce Rotaxanes
… driven approach is an efficient method to provide a better controlled synthesis of specific structures. This synthetic approach takes advantage of a labile bond between the guest molecule and the end stopper group. The reversibility of this bond allows for threading by the host …
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Synthesis of Protected Amino Alcohols and Amino Aldehydes.
… amino acid aldehydes, and to apply this methodology to the total synthesis of antipain.An efficient, general method for the synthesis of protected amino acid aldehydes was developed. The key intermediates in the synthesis are the corresponding protected amino alcohols. The amino alcohols …
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Design, Synthesis, Characterization, and Evaluation of Boronate Ester-Linked Porous Materials: Covalent Organic Frameworks and Polymers of Intrinsic Microporosity
… of alkylation into the COF pores and provided a synthetic method to dial in stability along with porosity for specific COF applications. Parallel research resulted in a new COF with incorporated phthalocyanine groups (CuPC-COF) which could lead to future semiconducting thin films. The synthetic …
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DESIGN AND SYNTHESIS OF PURINE BASED NEUROPROTECTORS AND NOVEL SYNTHETIC METHODS FOR THE TRIFLUOROMETHYLATION OF ALDEHYDE HYDRAZONES
… compounds. Herein, we demonstrate two different synthetic routes for the C(sp<sup>2</sup>−H)-trifluoromethylation of the aldehyde hydrazones using the readily available and cost-effective Langlois reagent (sodium trifluoromethanesulfinate). This reaction scheme is broadly applicable to a series …
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Studying the Effect of Zinc 3-(Dibutylamino) Propionate (ZDAP) Additive on Fire Retardant, Mechanical, and Physical Characteristics of Epoxy-Amine Networks
… transition temperatures. The effects of ZDAP synthetic method and purity on fire and mechanical performance were also assayed. It was found that reactive extrusion can produce low-quality (~80% purity) material that is effective for improving fire performance, but produces brittle material as …
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Nanomaterials from Nanocomponents: Synthesis and Properties of Hybrid Nanomaterials
… carbon nanotubes (SWNTs) are discussed; a novel synthetic method for these hybrids is presented, and an anomalous photoluminescence behavior is examined. Our experiments show that SWNTs can be decorated with CdSe nanoparticles at high loading densities, following the removal of the nanoparticle …
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Palladium-Imidazolium Carbene Catalyzed Heck Coupling Reactions and Synthesis of a Novel Class of Fluoroanthracenylmethyl PTC Catalysts
… of carbon-carbon bond formation. This standard synthetic method has been developed to a high level of utility using various catalysts, conditions and substrates. Yet significant drawbacks remain, including poor reactivity, the need for high temperatures and base, limited substrate generality, …
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The development of new synthetic methods for chromone and ergochrome construction
… for the first time, and to this end novel synthetic methods for α,β-unsaturated ketones and oxygenated dienes were developed.<br/><br/>Two major routes are described: The first uses aliphatic starting materials and allows the construction of highly substituted chromones by an intramolecular …
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