- Synthesis of 4 - n-alkyl substituted phenol method
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The invention discloses a synthesis method of 4-n-alkyl substituted phenol. Under the catalysis of zinc chloride, aniline and n-alkyl alcohol with the carbon number being 4-30 react in methylbenzene or xylene to obtain the 4-n-alkyl substituted aniline, and then the 4-n-alkyl substituted aniline reacts with sodium nitrite and acid to obtain the 4-n-alkyl substituted phenol. The synthesis method is easy to implement, an intermediate directly enters the next reaction without being separated or purified, and therefore the reaction efficiency is improved. The final product is high in purity and is good in depth of parallelism when reappearing, and technological conditions are suitable for mass production.
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Paragraph 0021-0024
(2018/04/01)
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- LUBRICATING COMPOSITION CONTAINING AN ASHLESS TBN BOOSTER
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The invention provides a lubricating composition containing an oil of lubricating viscosity and a sulfurized aromatic amine compound, especially sulfur coupled aniline. The invention further relates to methods of lubricating an internal combustion engine by supplying the described lubricating composition to the internal combustion engine. The invention further relates to the use of the sulfurized aromatic amine compound as a TBN booster and an antioxidant.
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- CLASS II HMG-COA REDUCTASE INHIBITORS AND METHODS OF USE
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Disclosed are compositions and methods for treating bacterial infections.
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Paragraph 0050
(2014/01/08)
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- Supramolecularly engineered perylene bisimide assemblies exhibiting thermal transition from columnar to multilamellar structures
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Perylene 3,4:9,10-tetracarboxylic acid bisimide (PBI) was functionalized with ditopic cyanuric acid to organize it into complex columnar architectures through the formation of hydrogen-bonded supermacrocycles (rosette) by complexing with ditopic melamines possessing solubilizing alkoxyphenyl substituents. The aggregation study in solution using UV-vis and NMR spectroscopies showed the formation of extended aggregates through hydrogen-bonding and π-π stacking interactions. The cylindrical fibrillar nanostructures were visualized by microscopic techniques (AFM, TEM), and the formation of lyotropic mesophase was confirmed by polarized optical microscopy and SEM. X-ray diffraction study revealed that a well-defined hexagonal columnar (Colh) structure was formed by solution-casting of fibrillar assemblies. All of these results are consistent with the formation of hydrogen-bonded PBI rosettes that spontaneously organize into the Col h structure. Upon heating the Colh structure in the bulk state, a structural transition to a highly ordered lamellar (Lam) structure was observed by variable-temperature X-ray diffraction, differential scanning calorimetry, and AFM studies. IR study showed that the rearrangement of the hydrogen-bonding motifs occurs during the structural transition. These results suggest that such a striking structural transition is aided by the reorganization in the lowest level of self-organization, i.e., the rearrangement of hydrogen-bonded motifs from rosette to linear tape. A remarkable increase in the transient photoconductivity was observed by the flash-photolysis time-resolved microwave conductivity (FP-TRMC) measurements upon converting the Colh structure to the Lam structure. Transient absorption spectroscopy revealed that electron transfer from electron-donating alkoxyphenyl groups of melamine components to electron-deficient PBI moieties takes place, resulting in a higher probability of charge carrier generation in the Lam structure compared to the Colh structure.
- Yagai, Shiki,Usui, Mari,Seki, Tomohiro,Murayama, Haruno,Kikkawa, Yoshihiro,Uemura, Shinobu,Karatsu, Takashi,Kitamura, Akihide,Asano, Atsushi,Seki, Shu
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p. 7983 - 7994
(2012/06/30)
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- Synthesis, biological study and complexation behavior of some anionic schiff base amphiphiles
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A novel series of anionic Schiff base amphiphiles were synthesized. The chemical structures of these compounds were elucidated using different spectroscopic tools. The surface and thermodynamic properties of the prepared Schiff bases were studied using classical measurements including surface and interfacial tensions. The surface parameters of these compounds, e.g., surface tension, critical micelle concentration, effectiveness, efficiency, maximum surface excess, minimum surface area, and interfacial activity showed their good surface activity. Their thermodynamic parameters of adsorption and micellization including free energy change of micellization and adsorption showed their tendency toward adsorption at the interfaces and also micelle formation at lower concentrations. The complexation behavior of the synthesized Schiff bases were study through the interaction of the Schiff base (IIIa; SBSD) with nickel chloride hexahydrate. All synthesized compounds in addition to NiCl2.6H2O and Ni Schiff Base complex have been evaluated for their antibacterial activity against Gram-positive and Gram-negative bacteria. The results of the biocidal activities showed high potent action of (Ni-IIIa; Ni-SBSD) complex more than Schiff base IIIa; SBSD. AOCS 2010.
- Abdel-Salam, Fatma H.
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experimental part
p. 423 - 431
(2011/12/15)
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- Liquid-crystalline polymorphism of symmetrical azobananas: Bis(4-(4-alkylphenyl)azophenyl) 2-nitroisophtalates
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In this paper we present a series of novel compounds, bis(4-(4-alkylphenyl) azophenyl) 2-nitroisophtalates, which exhibit nematic and banana-type liquidcrystalline phases. The alkyl chain length varies from 1 to 18 carbons. The first ten members of this series exhibit nematic phase. The last eleven compounds exhibit banana-type liquid crystalline phases. The propyl and pentyl derivatives have extra second type of banana mesophase. Copyright Taylor & Francis Group, LLC.
- Zygadlo,Dardas,Nowicka,Hofmann,Galewski
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p. 283 - 291
(2011/08/02)
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- Ring alkylation of aniline or an aniline derivative using ionic liquid catalysts
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A process for ring-alkylating aniline or an aniline derivative in which aniline or an aniline derivative is reacted with an alkylating agent in the presence of an ionic liquid which includes a Lewis acid and a quaternary cation, to produce a ring-alkylated alkylaniline or a ring-alkylated aniline derivative. The use of an ionic liquid permits convenient separation of the alkylated reaction product from the reactants.
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Page/Page column 3
(2008/06/13)
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- Process for low color bisphenol
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A process comprising the addition of a degradation inhibiting effective amount of an amine having a boiling point above that of the phenol used in the process to a composition comprising the said phenol and a bisphenol, the addition occurring prior to a procedure which subjects the bisphenol to substantial heat, said bisphenol produced from an acidic ion exchange resin catalyzed reaction of the said phenol and a ketone or aldehyde.
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- LIQUID CRYSTALLINE PROPERTIES OF 4-CHLOROBENZYLIDENE-4-AKYLANILINES
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A new group of Schiff bases containing a polar terminal group was synthesized: .The alkyl was changed from n=1 to n=12.Based on calorimetric (DSC) studies and on observations of textures the phase situation was characterized.
- Galewski, Zbigniew
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p. 233 - 242
(2007/10/02)
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- Reaction of Azomethine Moiety Buried in Bilayer Membranes
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The reaction with water and amines of the azomethine moiety that is part of single-chain ammonium amphiphiles was examined.These amphiphiles form stable bilayer aggregates when they have the alkyl tail of C7 or C12.The reaction with water of the bilayer-forming amphiphiles ceases at the hydration stage and are 10-2000 times slower than those of the amphiphiles which do not form bilayers and undergo hydrolytic cleavage.The reactivity of the azomethine moiety in bilayers decreases with increasing distance from the membrane surface.The Arrhenius plots for the bilayer-forming amphiphiles show discontinuities at temperatures corresponding to phase transition of the respective bilayer (Tc).The apparent activation energy is larger at temperatures below Tc than at temperatures above Tc.This suggests that water penetration is facilitated in the fluid bilayer.The reaction with amines was affected by their solubility in the bilayer matrix, and poly(ethylenimine) gave a much reduced reaction rate when the azomethine moiety was buried deep in the bilayer matrix.
- Okahata, Yoshio,Ando, Reiko,Kunitake, Toyoki
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p. 802 - 808
(2007/10/02)
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- Study of the Influence of Molecular Length on the Characteristics of the Ordered Smectic Phase.
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Study of DTA and X-rays of p-phenyl-benzylidene-p'-alkylanilines of mesomorphic phases demonstrates the predominant role of the aliphatic chain length. In effect, it governs the appearance of the different phases; the correlation between layers decreases for greater chain lengths. The nonlinear variations of SmB layer thickness for these compounds shows clearly the importance of steric effects coupled with the molecular length with respect to the dipolar effect.
- Benattar,Levelut,Strzelecki
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p. 1233 - 1240
(2007/10/05)
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