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Showing 1 to 20 of 62 for “"Carbazole"”.
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Regioselektive Synthese oxygenierter Carbazole
… war die regioselektive Synthese oxygenierter Carbazole. Dabei wurde das Konzept der eisenvermittelten Carbazolsynthese angewendet und darüber hinaus als Alternative die palladiumvermittelte Carbazolsynthese weiterentwickelt. Die für den Palladiumweg benötigten N,N-Diarylamine konnten über die …
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Palladium -catalyzed synthesis of carbazole derivatives and formal total syntheses of several naturally occurring carbazole alkaloids
… total syntheses of several naturally occurring carbazole alkaloids including murrayaquinone A, murrayafoline A, koenigine-quinone A, murrayanine, dimeric O-demethylmurrayafoline A, and (+)-aspidospermidine. These new syntheses are generally more efficient and higher yielding compared to the …
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New Carbazole Based Materials for Optoelectronic Applications
… as core molecule. Substituted fluorene and carbazole units were attached to the core molecule as side arms via a trifold Suzuki cross coupling reaction. The target compounds were highly purified by medium pressure liquid chromatography (MPLC) as purity is an important prerequisite for …
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Carbazole-based porous organic polymers for photocatalytic hydrogen evolution
… efficiencies. Monomers bearing electron-rich carbazole groups can easily be oxidative coupled yielding in carbazole-based porous organic polymers (CPOPs). Various CPOPs with varying monomer cores, specific for its certain application, were oxidative polymerized by applying iron(III) chloride …
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Synthese halogenierter Carbazole und Totalsynthese der Amaryllisalkaloide Pratosin und Hippadin
Während meiner Dissertation beschäftigte ich mich mit der Synthese von polyhalogenierten Carbazolderivaten. Das Carbazolgerüst wurde über den Palladiumvermittelten, bestehend aus Buchwald-Hartwig-Aminierung und oxidativer Cyclisierung, aufgebaut. Die Halogensubstituenten wurden entweder am Carbazol …
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Novel Carbazole Based Methacrylates, Acrylates, and Dimethacrylates to Produce High Refractive Index Polymers
… and non-linear optics, such as holography. Carbazole based polymers have demonstrated good optical, photo-refractive, and charge-transporting properties, combined with ease of processing. The objective of this research was to design, synthesize, and characterize high refractive index …
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Synthesis and investigation of benzimidazole and carbazole ß-haematin inhibiting scaffolds with antimalarial activity
… different scaffolds, namely benzimidazole and carbazole indole. In order to preselect benzimidazole derivatives for synthesis, Discovery Studio and Pipeline Pilot where used in tandem to enumerate 325 728 in silico compounds. These were filtered according to predicted β-haematin inhibition …
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A Comparison of the Absorption Spectra of Diphenylamine and Carbazole and Several of their Derivatives
University of Minnesota Masters thesis. May 1921. Major: Chemistry. Advisor: Dr. Hunter, Dr. Tate. 1 computer file (PDF); 41 pages.
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Synthesis of side-chain-modified mycothiol analogues incorporating carbazole quinones, and evaluation as inhibitors of enzymes in the Mycobacteria
… discovery of anti-TB activity associated with carbazole quinones such as B, led to the design and synthesis of a new class of hybrid molecules C which have the carbazole quinone motif tethered to the pseudodisaccharide core. The synthesis of these hybrid molecules involved initial preparation …
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Iron-mediated Synthesis of the Antiostatins
… active natural products from the family of carbazole alkaloids, antiostatins A1 to A4 and B2 to B5, were established. Spectroscopic data of the synthesised natural products are in good agreement with the isolated antiostatins from Streptomyces cyaneus 2007-SV1, which confirms the molecular …
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Design, synthesis and development of novel indolocarbazole derivatives as potential anti-cancer agents
… a range of bisindolylmaleimide and indolo[2,3-a]carbazole analogs, and investigation of their potential as successful anti-cancer agents. Following initial investigation of classical routes to indolo[2,3-a]pyrrolo[3,4-c]carbazole aglycons, a new strategy employing base-mediated condensation of …
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Synthese neuer Furo[3,2-a]- und Pyrano[3,2-a]carbazolalkaloide
… Strategie konnten drei verschiedene Furo[3,2-a]carbazole dargestellt werden und aufgrund eines Vergleichs der analytischen Daten eine fehlerhafte Strukturzuweisung bei der Isolierung zweier dieser Verbindungen aus natürlichen Quellen festgestellt werden. Die Synthese von Furoclausin-B konnte …
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Experimental and theoretical investigations of the dielectric and electro-optical properties of polycarbazoles and polysiloxanes
… determined values. Samples of poly(N-vinyl carbazole) possessing different tact icities were prepared and carefully characterised. Measurements of their static dielectric and electro-optical properties in solution in l ,4-dioxan have been made. The results of these measurements support the …
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Novel Host Materials for Blue Phosphorescent Organic Light-Emitting Diodes
… The first and second approach was applied to carbazole-based host materials, whereas the third was demonstrated on phosphazene-based host materials. In the first approach, the molecular structure of a well-known carbazole-based host material, 4,4’-bis(carbazol-9-yl)-2,2’-biphenyl (CBP), was …
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Studies of Titanium Dioxide Nanoparticles and Surfactants Effects, Singly and in Combinations, on Luminescence Intensity of Some Aromatic Compounds.
… fluoranthene, anthracene, phenanthrene, and carbazole. Rutile phase TiO<sub>2</sub> was synthesized using the low temperature sol-gel method. Carbazole and phenanthrene were severely quenched by all surfactants singly or in combination with TiO<sub>2</sub>. Anthracene and fluoranthene showed …
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Block copolymers containing charge transport groups and semiconductor nanoclusters : synthesis, characterization, and optoelectronic applications
… 2, as the initiator. A monomer with pendant carbazole groups, 2-([methyldi(N-carbazolyl)]silyl)norbomene, was used as the hole-transporting species. A monomer with pendant dinitrobenzene groups, 2-[(3',5'-dinitrobenzoyl)methyl]norbomene, was used as the electrontransporting species. Both …
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Optically active photoresponsive multifunctional polymeric materials
… (MMA, tert-BMA and TrMA). On the other hand carbazole containing polymers [2] have attracted much attention because of their unique features. The use of these materials in advanced micro- and nanotechnologies spreads in many different applications such as photoconductive and photorefractive …
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Binding anions using simple neutral molecules
… states. A set of ten urea/thiourea linked indole/carbazole groups were found to have high affinities for a variety of oxo-anions in highly competitive DMSO solutions. Of these receptors, the diindolylurea motif was found to be excellent for the binding of dihydrogen phosphate. This group of …
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"Part A. Functional Modular Phenylacetylene Units: A ""Molecular Turnstile."" Part B. Progress Towards an Electrochemically Active 9-Phenylcarbazole Hyperbranched Polymer"
… based on the condensation of an AB$\sb2$ 9-phenylcarbazole monomer 169 has been described. Initial condensation reactions have provided material of greater than 100,000 mw as determined by GPC. No estimate of the degree of branching has been made. Evidence for olefinic linkages between carbazole …
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