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Showing 1 to 20 of 39 for “"Naphthol"”.
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The synthesis of some naphthol (2,3-c) pyrans
Bibliography: p. 60-61.
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Reversible and irreversible adsorption of naphthalene and α-naphthol to soil
Experiments were performed with naphthalene and a-naphthol to compare the processes involved in the sorption of a polycyclic aromatic hydrocarbon (PAH) and its metabolite, respectively, and to assess the bioavailability of these two compounds adsorbed to two sandy soils with different organic …
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Cyanoethylation of 2-Naphthol. Influence of Solvent and Catalyst on the Course of Reaction
… the catalyst on the course of the reaction of 2-naphthol with acrylonitrile; | (2) to determine whether a relationship between reaction conditions and product distribution could be established.
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Reaction of an Ambident Anion. Effect of Solvent and Catalyst on the Cyanoethylation of 2-Naphthol
The cyanoethylation of the ambident anion, 2-naphthoxide, is known to proceed either by carbon- or oxygen-alkylation, depending upon reaction conditions. Recently a study was made on the effect of solvent on the course of the reaction. | The purpose of the present investigation was to study this …
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Resistance evaluation and management of Colorado potato beetle, Leptinotarsa decemlineata (Say), using novel chemistries
… from Painter, VA exposed to permethrin [±-naphthol (F= 11.66, df= 4, 20, P<0.0001) and "-naphthol (F= 11.86, df= 4, 20, P<0.0001)], oxamyl [±- naphthol (F= 10.64, df= 4, 20, P<0.0001) and "-naphthol (F= 6.94, df= 4, 20, P=0.0011)], tolfenpyrad [±- naphthol (F= 407.62, df= 1, 8, P<0.0001) …
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Gas-phase Ion Chemistry of Hydroxy and Amino-substituted Interstellar Polycyclic Aromatic Hydrocarbons and Protonated Polycyclic Aromatic Hydrocarbons
… ion structure. The ten molecules studied were: 1-naphthol, 2-naphthol, 1-naphthylamine, 2-naphthylamine, 1-aminoanthracene, 2-aminoanthracene, 1-phenanthrol, 9-phenanthrol, 1-hydroxypyrene and 1-aminopyrene. Since it is believed that larger PAHs, on the order of more than 50 carbon atoms, populate …
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Total synthesis of (S)-4-hydroxy-[a]-Lapachone
… The commercially available compound 2-acetyl-1-naphthol was used as the starting material. The synthesis involved methylation, followed by Baeyer-Villiger oxidation, and hydrolysis of the acetate to give 1-methoxy-2-naphthol. After protecting of the hydroxyl group, t-BuLi was used to form …
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Spectroscopic and thermodynamic studies of supercritical fluid solutions containing a cosolvent
… to study structure-specific probe molecules (2-naphthol, 5-cyano-2-naphthol, and 7-azaindole) in the supercritical fluids carbon dioxide, ethane, ethylene, and fluoroform, with water, methanol, and ethanol as cosolvents. In liquid solutions, these probes exhibit well characterized spectral …
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Fading of Substituted phenylazo - B - naphthols on polyolefins
… fading of a series of substituted phenylazo-B-naphthol dyes on polypropylene by means of irradiation with short and long ultraviolet light sources, under aerobic and anaerobic atmospheres, respectively. It nas also intended that similar experiments be carried out on polyethylene so as to …
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A STUDY OF ORGANOGELS AND THEIR SOLUTE INTERACTIONS
… solute molecules (substituted phenols, anilines, naphthols) with the organogels were found to be in the range of 1.3 to 500. These partition coefficients are roughly 40 times less relative to the partitioning of the same solutes to AOT reverse micelles in solution. The AOT organogels were found to …
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Synthetic Routes to 3-Fold Symmetric Tridentate Oxygen Donor Ligands
… 17, was synthesized from (±)1,1′-bi-2-naphthol. A one-pot synthesis for the rac-binaphthyl phosphite derivative was developed with an increased yield from the previously published synthesis. The racemic version of the ligand was characterized by NMR and mass spectroscopy. The chiral …
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Wasserstoffatomdynamik in Radikalen, Clustern und Biomolekülen
… photoacide Verbindungen wie Phenol oder Naphthol ein Wasserstoffatom oder ein Proton an Solvensmoleküle übergeben, steht derzeit im Mittelpunkt lebhafter wissenschaftlicher Diskussion. Für das Verständnis der Photoacidität ist die Kenntnis der Schwingungsstruktur, v.a. der …
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A Study of the Interactions Involved in the Direct Liquid Chromatographic Resolution of Racemates
… are proposed for the resolution of 1,1'-bi-2-naphthol (BBN) and 5-arylhydantoins as their analogs upon a CSP prepared from N-3,5-dinitrobenzoylphenylglycine. The models allow assignment of the configuration of each enantiomer based upon elution order. However, care must be excersized when the …
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Lithiation of Oxy-Arenes; New Methodology for Electrophilic Aromatic Substitutions: Attempted Synthesis of Thiaheptalenes and Heterocyclic Pyrene Systems
… the 3 position. Similarly, lithiation of (alpha)-naphthol under the same reaction condition gave 8-position lithiation and 2-hydroxybiphenyl was lithiated at the 2'-position. New reagents, 1,2-dibromo- and 1,2-dichloro-tetrafluoroethane were used for the halogenation of the lithiated positions. …
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Electrically Controlled Formation and Release of Admicelles for Solid Phase Extraction
… is the preconcentration of a test probe, 2-naphthol, using electrical control of the formation and release of dodecyl sulfate on planar gold, gold coated stainless steel, and a porous stainless steel frit, using impedance spectroscopy to observe the layer formation with various surfactant …
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Development of defined media for motility and for growth of Spirillum volutans, with special reference to biological monitoring of pollutants and to obligate microaerophilism of bacteria
… chloride (1 ppm), hydrazine (10 ppm), i-naphthol (3 ppm), and others. Effective concentrations ranged up to several per cent for the alcohols tested. The response was immediate.
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Liquid collection efficiencies after supercritical fluid extraction
… naphthalene, <i>n</i>-decanoic acid, 2-naphthol, and <i>n</i>-tetracosane was spiked onto sand and extracted with supercritical carbon dioxide to evaluate the collection efficiency of various solvents and solvent mixtures. Nine single collection solvents and four mixed collection solvent …
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A pH Switchable Responsive Surface for the Trapping And Release of a Hydrophobic Substance
… released using this unique switching approach. 2-naphthol, for example, is hydrophobic and thus was trapped at lower pHs (pH 4) (hydrophobic surface) and released at higher pHs (pH 10) (hydrophilic surface) on this responsive surface</p>
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Towards polyethylene-based materials with non-alternatively incorporated carbon monoxide monomer
… dimethyl) with either a BINOL (1,1′-bi-2-naphthol)-based phosphine diphenol (P,O) ligand or an analogous ligand which features an ethyl ether in place of the nonortho phenol. All complexes were active for ethylene homopolymerization (featuring activity up to 81.3 × 105 g polymer × mol Ni–1 …
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