56-37-1Relevant articles and documents
Activation of C-Cl Bonds in Chloroalkanes by Nickel Oxide Nanoparticles: Formation of Tetrasubstituted Ammonium Salts from Tertiary Amines
Park, Kang Hyun,Jung, Il Gu,Chung, Young Keun,Han, Jin Wook
, p. 411 - 416 (2007)
Nickel oxide nanoparticles, readily available and easy to handle, were found to be an effective catalyst in the catalytic activation of C-Cl bonds in chloroalkanes. Coupling reactions of chloroalkanes and tertiary amines in the presence of the nickel oxide nanoparticle catalyst gave moderate to high yields of quaternary ammonium salts depending upon the amines.
METHOD FOR SYNTHESIZING AMMONIUM SALT AND COMPOSITION OBTAINED BY INCORPORATING POLYSACCHARIDES INTO AMMONIUM SALT
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Paragraph 0030, (2016/12/22)
PROBLEM TO BE SOLVED: To provide a method for synthesizing an ammonium salt containing a quaternary ammonium salt in a shorter time than a conventionally known example and to provide a new composition containing an ammonium salt and polysaccharides such as cellulose or chitin. SOLUTION: There are provided: a method for synthesizing ammonium salt containing a quaternary ammonium salt in a shorter time than a conventionally known example; and a method for producing a new composition containing an ammonium salt and polysaccharides such as cellulose or chitin. COPYRIGHT: (C)2015,JPOandINPIT
Thermal stability of quaternary ammonium hexafluorophosphates and halides
Zhuravlev,Nikol'skii,Voronchikhina
, p. 824 - 830 (2014/02/14)
Thermal decomposition of hexafluorophosphates of short-chain tetraalkylammonium salts of the general formula R3R'NPF6, where R3 = R' = CH3, C2H5, C 4H9; R3 = C2H5, R' = CH2C6H6 or CH2CH=CH2, was studied by thermal gravimetric analysis. Measurements were performed in air in the temperature interval 20-500°N. The thermal stability of halides with the same cations in the same temperature interval was studied for comparison. The effect of cation on the thermal stability of the halides and hexafluorophosphates was examined. The mechanism of thermal decomposition of quaternary ammonium hexafluorophosphates was suggested.
Preparation of fat-liquor based on jojoba oil under phase transfer catalysis
Nashy, El-Shahat H. A.,Megahed,Abd El-Ghaffar
experimental part, p. 1239 - 1246 (2011/11/12)
Jojoba oil is of immense importance for industrial applications. There are a lot of published articles concerning its various uses in cosmetics, detergents, surfactants and lubricants. Therefore, this work was devoted to exploring its application for further use in the leather industry as a fat-liquoring agent. The fat-liquoring process is one important step in leather manufacturing, with the intention of obtaining leather of full, soft handle, flexibility, and pliability as well as improving its mechanical properties. The study involved preparation of jojoba fat-liquor via a sulfitation process. An improvement of the sulfitation process based on combined SO3 content was achieved under phase transfer catalysis (PTC). Two differently prepared types of phase transfer catalyst of phosphonium and ammonium types were investigated, namely, benzyl tri-phenyl phosphonium chloride (BTPP) and tri-ethyl benzyl ammonium chloride (TEBA). The fat-liquored leather led to an improvement in its mechanical properties such as tensile strength and elongation at break. In addition, a significant enhancement of the texture of the treated leather by jojoba fat-liquor as indicated in the scanning electron microscope (SEM) images was observed.
Distribution of the products of benzhydryl bromide heterolysis in the presence of triphenylverdazyl in aprotic solvents
Serebryakov,Kryzhanovskaya,Dzhurinskaya
, p. 798 - 800 (2008/02/02)
The distribution of products of benzhydryl bromide heterolysis in the presence of triphenylverdazyl in anhydrous nitrobenzene and propylene carbonate, as well as in anhydrous acetonitrile in the presence of benzyltriethylammonium chloride was studied. In kinetic experiments the contribution of verdazyl alkylation was always minor, and verdazyl was mostly consumed in the reaction with HBr evolved during solvolysis. Thus, triphenylverdazyl is not an indicator of the solvent-separated ion pair of benzhydryl bromide. Pleiades Publishing, Inc., 2006.
The synthesis of quaternary ammonium salts from ammonium salts and dialkyl carbonate
Zheng, Zhuoqun,Wu, Tinghua,Zhou, Xiaoping
, p. 1864 - 1865 (2008/03/14)
Quaternary ammonium salts were synthesized from ammonium salts and dialkyl carbonates over an ionic liquid catalyst 1-ethyl-3-methylimidazolium bromide. The Royal Society of Chemistry 2006.
Structure and Stability of Quaternary Ammonium Interhalides: Experimental and Quantum-Chemical Study
Simonyan,Kletskii,Chernov'yants,Gol'eva
, p. 575 - 582 (2007/10/03)
The electronic structure of a series of ammonium interhalides [R 1R2R3R4N]XI2, where R1 = CH3, C2H5, C3H 7, F, H; R2 = R3 = R4 = CH 3, H; X = Cl, Br, I, was studied by ab initio calculations (RHF/3-21G, RHF/HW, MP2/HW). The thermodynamic stability of these compounds correlates with the strength of the hydrogen bond N-H...X and three-center interhalide bond X-I-I. Calculations confirmed that, in polar solvents, these compounds preferably decompose to [R1R2R3R 4N]+ and XI2- (with subsequent decomposition of the anion), and in nonpolar solvents, to the neutral species [R1R2R3R4N]X and I2. The calculation results were compared to the experimental data obtained by single crystal X-ray diffraction, 1H NMR spectroscopy, and spectrophotometry.
Chlorination and alkylation of toluene with carbon tetrachloride
Smirnov,Nevskaya,Golubeva
, p. 20 - 25 (2007/10/03)
It was shown that benzyl chloride can be synthesized from toluene and carbon tetrachloride with a high selectivity. The optimum conditions of side-chain chlorination and benzene-ring alkylation in the CCl4-toluene system were determined.
Local anesthetic compounds and uses
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, (2008/06/13)
Novel compounds, pharmaceutical compositions and methods are disclosed for producing local anesthesia of long-duration. The compounds of this invention are multibinding compounds that comprise from 2 to 10 ligands covalently attached to a linker or linkers, each ligand being capable of binding to a ligand binding site in a voltage-gated Na+channel to modulate the biological processes/functions thereof.
Carbapenem-3-carboxylic acid ester derivatives
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, (2008/06/13)
Disclosed are carbapenem-3-carboxylic acid ester derivatives of formula (I), wherein R1 is a hydrogen atom or a lower alkyl group, R2 is an alkyl group which may be substituted by a cycloalkyl group having about 4 to 7 carbon atoms and which may be substituted by a lower alkyl group, or is a cycloalkyl group having 4 to 7 carbon atoms which may be substituted by a lower alkyl group and n is 0 or 1. The compounds are highly absorbable through the digestive tract and are rapidly converted in the body to the active compound, which shows strong antibacterial activity. STR1
