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Showing 1 to 11 of 11 for “"Benzoquinones"”.
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Some aspects of quinonoid chemistry
… 2 - acetyl - 3 -alkylamino - 6 - anilino - 1,4 - benzoquinones were prepared by the reaction of 2 - acetyl - 3,6 - dianilino - 1,4 - benzoquinone with alkylamines in chloroform. Irradiation of these alkylamino - p -benzoquinones with ultra-violet light gave benzoxazoles where an á -hydrogen atom …
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Reactions of quinones with aromatic ethers.
… have been prepared by the arylation of benzoquinones with diazotised 3,4-dimethoxyaniline (Meerwein reaction). The structures of the arylquinones are determined spectroscopically and by conversion to known compounds. The aluminium chloride-catalysed reaction between benzoquinones and …
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Formation of 2-halomethylene-4-cyclopentene-1,3-diones and/or 2-halo-1,4-benzoquinones, total synthesis of methyl linderone and Wacker-type oxidation of aryl-substituted alkenes
… and/or 2-halo-1,4-benzoquinones. An in-depth study of the reactions of 4-(ethynyl)-4-hydroxy-2,3-substituted-2-cyclobuten-1-ones with N-bromo- or N-iodosuccinimide is described. This reaction was used in a short total synthesis of methyl linderone. Also, a series of …
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Isolation, Characterization, and Synthesis of Bioactive Natural Products from Rainforest Flora
… investigation of Miconia lepidota isolated two benzoquinones, primin and its n-heptyl analog. Fifteen analogs were synthesized for structure-activity relationship determination. It was found that benzoquinones with moderate-length alkyl side chains displayed the strongest activity in our yeast …
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The synthesis and benzannulation reactions of (trialkylsilyl)vinylketenes
… products providing efficient access to ortho-benzoquinones and benzofuran, benzoxepine, and benzoxocine ring systems are described. Additionally, unsuccessful attempts to prepare TAS-vinylketenes by the rearrangement of siloxy alkynes and by cross-metathesis are discussed.
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Potential applications of the natural design of internal explosion chambers in the bombardier beetle (Carabidae, Brachinus)
… spray out a heated corrosive fluid containing p-benzoquinones in a controlled direction [1][2]. Three salient features of the internal explosion chambers were found to be instrumental in withstanding the high pressures generated from the explosive mixing and protecting the Bombardier Beetle's …
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Homogeneous Cobalt Catalyzed Oxidations
… the oxidation of various substituted phenols to benzoquinones by Co(II) bis(salicylidene-(gamma)-iminopropyl)-methylamine, CoSalMDPT are described in Chapter I. The reaction is first order in {O(,2)}, {substrate}, and {Co}. A series of experiments are reported to provide strong support for a …
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DFT study of doped and functionalized fullerene based materials for lithium-ion battery applications
… that higher cell voltages can be obtained using benzoquinones functionalized with strongly electron withdrawing functional groups (SEWFGs) which render the parent chemical structure electron deficient. In this work, the effect of doping and functionalization on the redox and electronic properties …
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Field measurements and atmospheric simulation chamber studies of selected biomass burning marker compounds
… products including polyphenols, nitrophenols, benzoquinones, ring scission species and accretion products, generating new information on the atmospheric degradation pathways. The results confirm the importance of both OH addition and H-atom abstraction reactions in initiating the oxidation …
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Thymoquinone is a Novel Ligand which Activates Neu4 Sialidase to Promote a Pro-Inflammatory Response
… is believed to share similar properties to the benzoquinones already in use as therapeutic drugs. Based on previous reports on the anti-inflammatory properties of black seed oil and TQ, it was originally hypothesized that TQ would inhibit lipopolysaccharide (LPS)-induced cellular sialidase …
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Synthesis, characterisation and application of novel quinones for the detection of latent fingermarks
… product is hypothesised to be similar between benzoquinones, naphthoquinones and anthraquinones as they differ only by π conjugation. Another aim of this thesis was to synthesise a variety of quinones with differences in conjugation and substitution in order to compare and determine differences …