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Showing 1 to 15 of 15 for “"Diazo compounds"”.
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Coupling reactions using flow-generated diazo compounds
… to access new sets of highly versatile, unstable diazo compounds and their application in coupling reactions. In the first chapter, an introduction into the structure and reactivity of diazo compounds is provided, as well as a discussion of currently available methods for their generation. The …
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Stabilisation of diazo compounds used in lithographic systems.
… to be due to the presence in the formulation of diazonium compounds that were thermally unstable. These compounds were studied in coating solutions and printing plates. Alternative analytical techniques for diazonium analysis were examined. It was found that HPLC and UV/vis spectroscopy were most …
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Structure and Reactivity of Aryl Carbenes and Aryl Nitrenes: Experimental and Computational Approaches
… generated by photolyses of their corresponding diazo compounds. The physical and chemical behaviors of the diazo compounds and carbenes were examined and compared with their parent system, diazofluorene (DAF) and fluorenylidene (FL).
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Alkylidene Dirhodium Chemistry
… from unsaturated dirhodium complexes and diazo compounds. Several aspects of the reactivity of the alkylidene group in these and related complexes have been examined.
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Bioorthogonal Reagents: Design, Synthesis, and Reactivity
… and it reacts rapidly with azides and diazo compounds. This reactivity is a result of noncovalent interactions between the dipole and dipolarophile in the transition state; an n→π* interaction or a hydrogen bond. In addition to its fast reactivity, ABC can be prepared in three steps, …
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Synthesis of N-Heterocycles and Thiocines via Electrophilic Divalent Reactive Intermediates
… natural products and pharmacologically active compounds. The synthesis of N-heterocycles is interesting and synthetically challenging which has motivated the work of the Driver group. My research has focused on using aryl amines and azides as the N-atom source to synthesize these complex …
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Time-Resolved Studies of Aryl Carbenes
… carbenes generated by photolysis of their parent diazo compounds in fluid solution. Irradiation of 9-diazofluorene generates a transient with an absorption maximum at 470 nm which is believed to be triplet fluorenylidene. The rate constant for formation of this intermediate was found to be 2.4 …
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Investigaiton of potential routes to 1, 5-diazonene
Thesis (M.S.)--Michigan State University. Dept. of Chemistry, 1968
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Organic Synthesis: Taming Chemistry using Enabling Technologies
… with batch processes to produce two medicinal compounds, a precursor to the sacubitril and OZ439 respectively. In the respect to the precursor to sacubritil, a flow-batch integrated synthesis is developed to provide the desired product in 54% yield over 7 steps from commercially available …
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Computational predictions and reactivity analyses of organic reactions
… ion-catalysed reactions between aldehyde and diazo compounds. Their selectivity cannot be explained using transition state theory. VRAI-selectivity, developed to predict the outcome of dynamically controlled reactions, can account for both the chemo- and the stereo-selectivity in these …
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Intramolecular carbenoid insertion : reactions of [alpha] -diazoketones derived from benzothienyl, pyrolyl and indolyl alkanoic acids with rhodium (II) acetate
… acetate decomposition chemistry observed for a-diazoketones tethered to thienyl, furanyl, and benzofuranyl moieties is dependent not only on the nature of the heteroatom but also on the length of the aliphatic tether linking the diazoketone moiety with the aromatic fragment. The present thesis …
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Novel synthetic methodology employing transition metal catalysed reactions of α-diazo-β-keto sulfonamides and α-cyano-α-diazoacetates; the impact of substituents on the reaction pathway
… focus of this thesis is the reactivity of α-diazo-β-keto sulfonamides, α-cyano-α-diazoacetates and α-arylsulfonyl-α-diazoacetates employing rhodium and copper catalysts. While the α-diazo-β-keto sulfonamides were specifically designed to investigate rhodium- and copper-catalysed …
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SOLID-SUPPORTED PORPHYRINS FOR CATALYSIS AND SENSING
… to the synthesis of azobenzenes, valuable compounds largely applied in textile, medical, and dye industries by a dehydrogenative coupling of anilines that occurs in the presence of CoII(TPP) (TPP=dianion of tetraphenyl porphyrin) catalyst and 4-nitrophenyl azide oxidant specie. Nine …