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Showing 1 to 14 of 14 for “"Carbazoles"”.
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Síntesis de indoles y carbazoles funcionalizados: catálisis con complejos de Au(III) y ácidos de Brønsted
… una nueva ruta para acceder a benzo[b]carbazoles por reacción directa de indoles con acetales de o-(hidroxialquil)benzaldehídos. Asimismo, hemos descrito la versión intramolecular de la reacción de indoles con alcoholes -activados, pudiéndose sintetizar derivados de indol fusionados. …
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Indoles y pirroles alquinil funcionalizados: síntesis y transformaciones catalizadas por complejos de oro(III)
… diferentes rutas que permiten la formación de carbazoles a partir de los correspondientes indoles funcionalizados en C3. Además, se ha puesto a punto una metodología eficaz para la obtención de tetrahidrobenzo[c]carbazoles y benzo[c]carbazoles. En el tercer capítulo, se describe una metodología …
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Synthesis of highly substituted benzo-fused nitrogen heterocycles via tandem benzannulation/cyclization strategies
… addition, a tandem strategy for the synthesis of carbazoles was developed and applied in the total synthesis of the carbazole alkaloid carazostatin as well as formal syntheses of the alkaloids carbazoquinocin C and antiostatin A₄.
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Nickel-catalyzed cross-couplings of unactivated secondary and tertiary alkyl halides and photoinduced copper-mediated asymmetric C-N cross-couplings
… reaction between secondary benzylic halides and carbazoles, with the use of a monodentate chiral phosphine ligand, are presented. The methodology is then extended to secondary [alpha]-haloamides, including [alpha]-halolactams, which are found to afford very promising yields and …
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Nickel-catalyzed asymmetric cross-couplings of secondary alkyl electrophiles and photoinduced, copper-catalyzed C-N couplings
… such as indoles, benzimidazoles, imidazoles, and carbazoles, undergo Ullmann couplings under mild conditions (room temperature) with an inexpensive catalyst (Cul, without an added ligand).
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The Separation of the Polar Constituents of Petroleum
… phenols and other oxygen-containing species; carbazoles; sulfoxides; and thiophenes, to be isolated reproducibly and quantitatively from relatively small crude oil samples (~ 0.5 g). Assessment of method selectivity with a suite of ‘model’ compounds showed that the resulting fractions were …
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Characterization of resins in alternative fuel mixtures
… etc.), neutral-nitrogen (indoles and carbazoles), and oxygen (carbonyl) compounds, and are free of hydrocarbons.
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Novel Organic Transformations Arising from Gold(I) Chemistry
… the synthesis of benzothiophenes, benzofurans, carbazoles and hydrindene. With the current resurgence of photochemical transformations being reported in literature, various opportunities for the use of Au(I) complexes arose. The substantial relativistic effect observed in gold which make it a …
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INTRAMOLECULAR CARBON-NITROGEN COUPLING FROM ISOLATED MONOHYDROCARBYL PALLADIUM(IV) COMPLEXES PREPARED USING H2O2 AS TERMINAL OXIDANT
… donating groups (R = H, Me, Et) readily form carbazoles at room temperature without formation of appreciable amounts of intermediates. The use of electron withdrawing group (R = COCH3, COCF3, SO2CH3, SO2CF3) slows down the reaction for intermediates to be observed and isolated. Mechanistic …
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Design, synthesis and development of novel indolocarbazole derivatives as potential anti-cancer agents
… new planar class of indolo[2,3-a]pyrimido[5,4-c]carbazoles was also investigated. Successful conditions for this transformation, as well as the limitations currently prevailing for this approach are discussed. Synthesis of 3,4-bisindolyl-5-aminopyrazole as a potential isostere of …
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Transition Metal-Catalyzed Preparation and Functionalization of Nitrogen-Containing Heterocycles
… was particularly useful for synthesizing carbazoles, and the synthesis of several highly oxygenated, naturally-occurring carbazo1es is described.
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Carbazole-based porous organic polymers for photocatalytic hydrogen evolution
… synthesis method. The electro polymerization of carbazoles yielding thin polymer films is another metal-free synthesis approach of CPOPs. In the second part of the thesis such polymer films were applied in photocatalytic water splitting for the first time, showing excellent reproducibility, …
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Development of P7C3-Class of Neuroprotective Molecules
Neurodegenerative diseases and disorders are physically, emotionally and financially devastating for patients and their families, and are also associated with great costs to caregivers and society. All of these neuropsychiatric conditions have in common neuronal cell death, for which there is …
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Design, Preparation and Characterization of Novel Pseudorotaxanes, Semirotaxanes, Rotaxanes, Non-Covalent Supramolecular Polymers and Polycatenanes
… a BMP32C10 bearing two electron-donating groups (carbazoles) with electron-accepting paraquat derivatives, the first [2]pseudorotaxane and the first pseudocryptand-type poly[2]pseudorotaxane based on BMP32C10 were isolated as crystalline solids as shown by X-ray analyses. The first dual component …