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Showing 1 to 20 of 35 for “"Benzene ring"”.
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Ring closure in the meta and para positions of the benzene ring: Structure of benzidine
Made available in DSpace on 2017-11-30T21:03:38Z (GMT). No. of bitstreams: 2 6534967.pdf: 9146206 bytes, checksum: a94e71d8a958ae15977ec0ed1bef11ad (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1922
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Influence of Molecular Orientation and Surface Coverage of w-Functionalized Mercaptans on Surface Acidity
… group is substituted on different carbons of the benzene ring. The difference in substitution patterns should present the hydroxyl group in different orientations in the interface between a self-assembled monolayer of the compound and aqueous solutions buffered over a pH range of 3-13. By …
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NONCOVALENT INTERACTION OF PLATINUM PLANAR AMINE COMPOUNDS WITH TRYPTOPHAN: A STRATEGY TO INTERFERE WITH P53-MDM2 INTERACTIONS AND TARGETING RETROVIRAL ZN FINGER-DNA INTERACTION (HIV NCP7)
… π system of pyridine or thiazole by means of a benzene ring (quinoline and benzothiazole) was found to enhance the π-π interaction with N-acetyl tryptophan.</p>
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A Contribution to the Chemistry of 1,2,3-BENZOTHIADIAZOLE
… that 1,2,3-benzothiadiazole is a cyclic ring compound are reviewed. Its pKa and ultraviolet spectrum are discussed. Evidence that the -NsN- group in 1,2,3-benzothiadiazole resembles a nitro-group is quoted and this fact together with the suggestion that there is partial bond fixation in …
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Intermediate compounds in the synthesis of lignin
… have shown that a nitro group deactivates the benzene ring. This may be an explanation of the failure to get a Fries rearrangement or Friedel-Crafts addition.</p><p>This synthesis was not accomplished by this method, but considerable information was gained for use in further work.</p>
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Synthesis of o-isotoluenes, o-quinodimethanes, and benzoenynyl carbodiimides and their cyclizations to polycyclic and heterocyclic compounds
… presence of a boron group and a tin group in the benzene ring of a reaction intermediate also provides handles to allow their transformations to an allyl substituent and an iodo substituent to produce a tetrasubstituted benzene ring (30%) in a single operation. Attempts to capture the …
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Synthesis and characterization of binuclear and unsymmetrical phthalocyanines
… metal free planar binuclear phthalocyanines sharing a benzene or naphthalene ring have been synthesized and characterized. The position of Q band of binuclear phthalocyanine sharing a naphthalene ring is red shifted compared to binuclear phthalocyanine sharing a benzene ring. The compounds are …
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Synthetic and spectroscopic studies of 6-substituted chromone derivatives
… and chromone derivatives are naturally occurring compounds found in the plant kingdom; for example, baicalein was used as a diuretic and anti-allergic drug in ancient Chinese medicine. A range of chromone-2-carboxylic acids were synthesized from six substituted 2- hydroxyacetophenones. From …
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Development of pharmacophore and CoMFA studies for sigma2 receptor ligands
… receptor ligands require localization on the benzene ring contributed through an electron withdrawing group.
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Palladium -catalyzed synthesis of carbazole derivatives and formal total syntheses of several naturally occurring carbazole alkaloids
… and 2-(tri-n-butylstannyl)-1-nitrobenzene. Many functional groups and ring sizes were tolerated in these reactions.;This novel approach to carbazolones was successfully applied to the formal total syntheses of several naturally occurring carbazole alkaloids including murrayaquinone …
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Synthesis of contorted nanographenes via multi-fold alkyne benzannulation reactions
… InCl3 and AgNTf2 in the synthesis of up to six benzene ring in one-pot reaction condition. In most of the cases, the chiral, helically twisted skeletons were unambiguously determined through X-ray crys-tallography. We are also very close (two-steps away) towards the synthesis of longer …
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Novel palladium-catalyzed synthesis of 3-substituted indoles and its application toward the total synthesis of indolactam V
… acid ethyl ester with substituted 2-bromo-l-nitrobenzenes. Alternatively, sequential vicarious nucleophilic substitution of substituted nitrobenzenes and Knoevenagel condensation with formaldehyde was used to prepare 2-nitrostyrenes. Palladium catalyzed N-heteroannulation of 2-nitrostyrenes …
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Experimental and theoretical investigation of the electronic structures of ferrocene-peptide conjugates
… closely resemble those of a gaseous substituted benzene ring and were found at a lower energy than the equivalent orbitals of Fc-Pro₂-OBz. This shift is proposed as a possible explanation for the decrease in redox potential observed upon the addition of a third proline residue to the peptide.
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Flame Studies on Conventional, Alternative, and Surrogate Jet Fuels, and Their Reference Hydrocarbons
… less than 10%, which are reasonable considering the uncertainties in both experiments and kinetic models.</p><p>The results of this work show that the conventional Jet-A and alternative jet fuels share very similar flame speeds and extinction limits despite of their differences in the …
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COPPER-MEDIATED N1-ARYLATION OF BENZOTRIAZOLES
… that contain three nitrogen atoms fused to a benzene ring. Along with their derivatives, they possess a wide range of properties. They are used in medical field, as they exhibit such properties as antibacterial,antiplasmoidal,antiprotozoal, antifungal and anti-inflammatory activities, among …
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The Adsorptive Separation of Aromatic Hydrocarbon Mixtures
… The lowest heats of adsorption were for dodecylbenzene and phenanthrene. Kinetics of adsorption were studied for different aromatic compounds. The diffusivity decreased significantly when a long alkyl chain was attached to the benzene ring e.g. in dodecylbenzene; molecules with small …
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NEW NCN-PLATINUM(II) COMPLEXES WITH LUMINESCENT PROPERTIES
During the doctoral period, my research has been focused on the synthesis and characterization of novel NCN-based platinum(II) complexes, obtaining more than twenty completely new compounds. These complexes have a terdentate chelating ligand with the general scaffold of a 1,3-di(2-pyridyl)benzene …
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DESIGN, SYNTHESIS, AND CHARACTERIZATION OF INDANE 2,5-DIKETOPIPERAZINES FOR LIQUID CRYSTAL APPLICATIONS
… (DKP) scaffold. Crystal engineering studies with this scaffold show that the molecules assemble into one dimensional tapes via reciprocal amide hydrogen bonds, tapes assemble into two dimensional sheets via arene-arene interactions, and sheets assemble into three dimensional …
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CONVERSION OF METHANOL AND LIGHT OLEFINS TO GASOLINE OVER A SHAPE SELECTIVE CATALYST ZSM-5
… The activation energy for diffusion of benzene in the Ni-ZSM-5 catalyst is 7 kcal/mole. All isotherms investigated can be represented by the Langmuir equation. ('14)C-labeled tracer studies confirm the important role that ethylene, propylene and butenes play as active intermediates in …
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