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 9 of 9 for “"Nitroarenes"”.
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SYNTHESIS OF N-HETEROCYCLES VIA PALLADIUM-CATALYZED REDUCTIVE CYCLIZATION REACTIONS OF NITROARENES AND NITROALKENES USING FORMIC ACID DERIVATIVES AS CO SURROGATES
The reductive cyclization reaction of nitroarenes to produce N-heterocycles has been investigated for more than four decades using CO as a cheap reductant, but it is still a fascinating area for research and advancements. On the other hand, using toxic CO gas is accompanied by many …
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PALLADIUM-BASED SYSTEMS IN HOMOGENEOUS CATALYSIS: EXPLORING NITROGEN LIGANDS FOR CO-MEDIATED REACTIONS
… catalytic system in reductive cyclization of nitroarenes, the study investigates CO and its surrogates as reductant for the synthesis of different nitrogen-containing heterocycles. Furthemore, the use of guanidines as ligands in carbonylation and alkoxycarbonylation of olefins has been …
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Development of Earth Abundant Metal-Catalyzed Reactions to Construct Heterocycles
… into pyrroles. The exposure of ortho-substituted nitroarenes to 3 mol % of (4,7-MeO-phen)Fe(OAc)2 and phenylsilane as the stoichiometricreductant afforded six-or seven-membered N-heterocycles. The scope of the reaction is broad and tolerates a range of electron-releasing or electron withdrawing …
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Organophosphorus-Catalyzed Reductive Functionalization of Nitrocompounds via P(III)/P(V) Redox Couple
… as terminal reductants, nitro compounds (nitroarenes, nitromethane and nitroalkanes) undergo reductive O-atom transfer reactions involving the conversion of P(III)/P(V)=O. With that, boronic acids were employed as coupling partners to intercept the nitrene reactivity of nitro compounds …
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Atomic/molecular layer deposition prepared size-selective catalysts and supported nickel catalysts
… chemoselective transfer reduction of different nitroarenes to produce corresponding aromatic amines.</p> <p>A highly stable and active Ni/γ-Al₂O₃ catalyst was synthesized by depositing Ni nanoparticles on porous γ-Al₂O₃ particles by ALD. The catalyst showed exceptionally high catalytic activity …
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Polarity Inversion in Silicon and Phosphorus Compounds
… studies of the 1,3-dipolar reaction of nitroarenes with geometrically constrained base-stabilized silylenes will be described. This cycloaddition initiates stepwise deoxygenation by silicon(II), and the application of this rare mode of reactivity to a room-temperature variant of the …
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New Synthetic Methodologies for the Construction and Optimization of Natural Products
… practical approach for the one-pot conversion of nitroarenes into amide derivatives. HOAc/Zn were utilized as a reducing agent and acyl chloride/Et3N were used as the acylating agent in DMF with good yield (?60%) of the amide. This method was applicable to 6-nitromanzamine A, where the yield of …
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Health hazards and cancer in relation to occupational exposures among Swedish seafarers
… Other exposures were carcinogenic PAHs and nitroarenes. A web-based survey to active seafarers in the Swedish merchant fleet revealed noise, the risk of accidents, whole-body vibrations and ergonomic strain as main work environment problems. General health, work ability and safety climate …
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Reducción de enlaces N‒O con glicoles catalizada por complejos de dioxomolibdeno(VI): síntesis de compuestos nitrogenados a partir de nitroarenos
El desarrollo de nuevos sistemas catalíticos tiene gran relevancia dentro de la Química actual por presentar beneficios tanto económicos como medioambientales. Este trabajo se centra en el desarrollo de nuevas metodologías en Síntesis Orgánica basadas en reacciones de desoxigenación de compuestos …