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Journal articles on the topic 'Quaternary amine compound'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Stenholm, Åke, Anders Backlund, Sara Holmström, Maria Backlund, Mikael Hedeland, and Petra Fransson. "Survival and growth of saprotrophic and mycorrhizal fungi in recalcitrant amine, amide and ammonium containing media." PLOS ONE 16, no. 9 (2021): e0244910. http://dx.doi.org/10.1371/journal.pone.0244910.

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The elimination of hazardous compounds in chemical wastes can be a complex and technically demanding task. In the search for environmental-friendly technologies, fungal mediated remediation and removal procedures are of concern. In this study, we investigated whether there are fungal species that can survive and grow on solely amine-containing compounds. One compound containing a primary amine group; 2-diethylaminoethanol, one compound with a primary amide group; 2,6-dichlorobenzamide (BAM), and a third compound containing a quaternary ammonium group; N3-trimethyl(2-oxiranyl)methanaminium chlo

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2

Wang, Bo, An-Jun Deng, Zhi-Hong Li, Nan Wang, and Hai-Lin Qin. "Syntheses and Structure–Activity Relationships in Growth Inhibition Activity against Human Cancer Cell Lines of 12 Substituted Berberine Derivatives." Molecules 25, no. 8 (2020): 1871. http://dx.doi.org/10.3390/molecules25081871.

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In this study, quaternary berberine chloride is used as a lead compound to design and synthesize a series of berberine-12-amine derivatives to evaluate the growth inhibition activity against human cancer cell lines. Forty-two compounds of several series were obtained. The quaternary berberine-12-N,N-di-n-alkylamine chlorides showed the targeted activities with the IC50 values of most active compounds being dozens of times those of the positive control. A significant structure–activity relationship (SAR) was observed. The activities of quaternary berberine-12-N,N-di-n-alkylamine chlorides are s

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3

Wang, Ming Yang, Mao Sheng Wan, and Cheng Bo Cao. "Synthesis and Properties of the Composite DSD Acid-Triazine Structure Containing Long-Chain Quaternary Ammonium Fluorescent Brighteners." Applied Mechanics and Materials 260-261 (December 2012): 83–86. http://dx.doi.org/10.4028/www.scientific.net/amm.260-261.83.

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The cetyl \ octadecyl dimethyl tertiary amine（percentage composition 7:3）is a very common and inexpensive chemical raw material in the chemical market. In this paper, a series of the new chemical composite DSD acid-triazine structure containing long chain quaternary ammonium salt fluorescent brighteners (FBs) were synthesized through a three-step condensation reaction of cyanuric chloride, DSD acid, cetyl \ octadecyl dimethyl tertiary amine and amino compound. The obtained compounds were characterized by the analysis of the IR spectrum, UV spectrum and fluorescence excitation and emission spec

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4

Jeyaprabha, C., S. Muralidharan, D. Jayaperumal, G. Venkatachari, and N. S. Rengaswamy. "Studies on corrosion inhibitors for oil‐well tubular material in acid environments." Anti-Corrosion Methods and Materials 45, no. 3 (1998): 148–52. http://dx.doi.org/10.1108/00035599810216812.

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To reduce the corrosion of oil‐ and gas‐well equipment during acid treatment, the acid must be inhibited. The behaviour of N‐80 oilfield material in 15 per cent hydrochloric acid solution inhibited by different inhibitor formulations containing amine, ester and a quaternary ammonium compound was studied at 303K for five hours by the mass loss method. The corrosion rates were obtained by polarisation. Impedance studies were carried out to evaluate the performance of the inhibitor formulations. It was found that the formulation containing 3,000ppm amine, 1,000ppm ester and 1,000ppm quaternary am

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5

Zhang, Hu, and Fu Rong Zhou. "Study on Synthesis of Alkynoxymethyl Benzyl Quaternary Ammonium Salt and its Corrosion Inhibition for Blast Furnace Gas Pipeline." Applied Mechanics and Materials 672-674 (October 2014): 684–87. http://dx.doi.org/10.4028/www.scientific.net/amm.672-674.684.

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Two kinds of alkynoxymethyl benzyl quaternary ammonium salt (ABQAS) were synthesized by raw materials of paraformaldehyde, propiolic alcohol, organic amine, benzyl chloride and ethanol under nitrogen protection, toluene as carrying agent. The products were characterized by FTIR. According to the characteristics of blast furnace gas pipeline, quaternary ammonium salt type compound corrosion inhibitor formulas were designed, and their corrosion inhibition performance were evaluated by weight-loss method and electrochemical method. The results showed that the products were synthesized as expected

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6

Yudovin-Farber, Ira, Jacob Golenser, Nurit Beyth, Ervin I. Weiss, and Abraham J. Domb. "Quaternary Ammonium Polyethyleneimine: Antibacterial Activity." Journal of Nanomaterials 2010 (2010): 1–11. http://dx.doi.org/10.1155/2010/826343.

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Quaternary ammonium polyethyleneimine- (QA-PEI-) based nanoparticles were synthesized using two synthetic methods, reductive amination and N-alkylation. According to the first method, QA-PEI nanoparticles were synthesized by cross-linking with glutaraldehyde followed by reductive amination with octanal and further N-methylation with methyl iodide. The second method is based on crosslinking with dialkyl halide followed by N-alkylation with octyl halide and further N-methylation with methyl iodide. QA-PEI nanoparticles completely inhibited bacterial growth (>106bacteria), including both Gram-

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7

Gotlib, Elena M., Аlmira R. Khasanova, Engel R. Galimov, and Аlla G. Sokolova. "Epoxy antifriction wollastonite-filled materials." Vestnik MGSU, no. 3 (March 2019): 311–21. http://dx.doi.org/10.22227/1997-0935.2019.3.311-321.

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Introduction. Domestic mineral natural-origin filler ‘wollastonite’, also known as calcium methyl silicate, is widely used as a base for wear-resisting epoxy antifriction materials. Due to anisodiametric shape of its particles, wollastonite functions as a micro reinforcement fibre enhancing adhesion strength and wear resistance of epoxy compositions, improving their antifriction properties, especially when organomodifying by quaternary ammonium salts. In this regard, the investigation of the impact of chemical composition of such surfactants as quaternary ammonium salts on the properties of ep

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8

Zaytsev, Vladimir P., Elena A. Sorokina, Elisaveta A. Kvyatkovskaya, et al. "Three-component reaction between isatoic anhydride, amine and methyl-substituted furylacrylaldehydes: crystal structures of 3-benzyl-2-[(E)-2-(5-methylfuran-2-yl)vinyl]-2,3-dihydroquinazolin-4(1H)-one, 3-benzyl-2-[(E)-2-(furan-2-yl)-1-methylvinyl]-2,3-dihydroquinazolin-4(1H)-one and 3-(furan-2-ylmethyl)-2-[(E)-2-(furan-2-yl)-1-methylvinyl]-2,3-dihydroquinazolin-4(1H)-one." Acta Crystallographica Section E Crystallographic Communications 74, no. 8 (2018): 1101–6. http://dx.doi.org/10.1107/s2056989018009982.

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Compounds (I), C22H20N2O2, (II), C22H20N2O2 and (III), C20H18N2O3 are the products of three-component reactions between isatoic anhydride, the corresponding amine and 3-(5-methylfuran-2-yl)- or (furan-2-yl)-2-methylacrylaldehyde. Compound (I) crystallizes in the monoclinic space group P21/n, while compounds (II) and (III) are isostructural and crystallize in the orthorhombic space group Pbca. The tetrahydropyrimidine ring in (I)–(III) adopts a sofa conformation. The NH nitrogen atom has a trigonal–pyramidal geometry, whereas the N(R) nitrogen atom is flattened. The furyl-vinyl substituents in

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9

Horrigan, F. T., and W. F. Gilly. "Methadone block of K+ current in squid giant fiber lobe neurons." Journal of General Physiology 107, no. 2 (1996): 243–60. http://dx.doi.org/10.1085/jgp.107.2.243.

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Voltage-dependent ionic currents were recorded from squid giant fiber lobe neurons using the whole-cell patch-clamp technique. When applied to the bathing solution, methadone was found to block IK, I Na and I Ca. Both I Na and I Ca were reduced without apparent change in kinetics and exhibited IC(50)'s of 50-100 and 250-500 mu M, respectively, at +10 mV. In contrast, IK was reduced in a time-dependent manner that is well fit by a simple model of open channel block (K(D)= 32+/- or 2 mu M, +60 mV, 10 degrees Celsius). The mechanism of I(K) block was examined in detail and involves a direct actio

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10

Han, Hua, Chang Liu, Jie Zhu, et al. "Contact/Release Coordinated Antibacterial Cotton Fabrics Coated with N-Halamine and Cationic Antibacterial Agent for Durable Bacteria-Killing Application." International Journal of Molecular Sciences 21, no. 18 (2020): 6531. http://dx.doi.org/10.3390/ijms21186531.

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Coating a cationic antibacterial layer on the surface of cotton fabric is an effective strategy to provide it with excellent antibacterial properties and to protect humans from bacterial cross-infection. However, washing with anionic detergent will inactivate the cationic antibacterial coating. Although this problem can be solved by increasing the amount of cationic antibacterial coating, excessive cationic antibacterial coating reduces the drapability of cotton fabric and affects the comfort of wearing it. In this study, a coordinated antibacterial coating strategy based on quaternary ammoniu

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11

Nicholas, Darrel. "Performance of waterborne copper/organic wood preservatives in an AWPA E14 soft-rot laboratory soil bed test using modified soil." Holzforschung 71, no. 9 (2017): 759–63. http://dx.doi.org/10.1515/hf-2016-0230.

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AbstractSoil chemistry is known to have a major effect on the degradation of treated wood by basidiomycete fungi in laboratory and exterior ground-contact exposures. However, this topic received little attention from a soft-rot (SR) decay perspective. In the present paper, laboratory SR tests were performed with two different types of forest soils, which were also modified. Test samples, made ofPinus glabra(Walt.) (pine) were treated with four commercial copper/organic waterborne preservatives. In addition, soluble or particulate copper and the organic co-biocides quarternary ammonia compound

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12

Bernhardt, PV, LS Curtis, NF Curtis, GA Lawrance, BW Skelton, and AH White. "Condensations of Ethane-1,2-Diamine, Formaldehyde and Ammonia (or Nitroethane) Directed by Nickel(II) or Copper(II). Crystal Structure of (8-Methyl-8-nitro-1,3,6,10,13,15-hexaazatricyclo[13.1.1.1 13,15]octadecane)nickel(II) Perchlorate." Australian Journal of Chemistry 42, no. 6 (1989): 797. http://dx.doi.org/10.1071/ch9890797.

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Both nickel(II) and copper(II) complexes of the sterically hindered linear tetraamines 1,3,5,7-tetra-azabicyclo [3.3.l]nonane-3,7-bis( ethanamine (4) and 3,3′-(ethane-1,2-diyl)bis(1,3,5,7-tetraaza-bicyclo [3.3.1] nonane (7) have been prepared from reaction of ethane-1,2-diamine complexes with formaldehyde and ammonia or by reaction of the metal salt with the quaternary 'hexamminium' cation (8) and ammonia, respectively. Spectroscopic properties and kinetics of the acid hydrolyses of these complexes are reported. Observed pseudo-first-order rate constants are of the order of 10-1 s-1 at 25° in

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13

Christoffers, Jens, Wolfgang Frey, Heiko Scharl, and Angelika Baro. "Absolute Konfiguration von (+)-1,2,3,4,6,7,8,8a-Octahydro-6-isochinolon- 8a-carbonsäuremethylester und die Stereochemie einer Kupfer-katalysierten asymmetrischen Michael-Reaktion / Absolute Configuration of Methyl (+)-1,2,3,4,6,7,8,8a-Octahydro-6-isoquinolone-8a-carboxylate and Stereochemistry of a Copper-Catalyzed Asymmetric Michael Reaction." Zeitschrift für Naturforschung B 59, no. 4 (2004): 375–79. http://dx.doi.org/10.1515/znb-2004-0404.

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AbstractEnantiopure Boc-protected piperidine derivative (+)-5c, with a quaternary stereocenter, was obtained by copper-catalyzed, L-valine diethylamide-mediated Michael reaction. For determination of the absolute configuration, 5c was derivatized by cyclization with pyrrolidine/AcOH to give compound 6 with bicyclo[4.4.0]-constitution, deprotection of the amino function with TFA and subsequent reaction with 2-iodobenzoic acid to yield the crystalline bicyclic amide 7. X-ray crystallographic analysis confirmed the constitution of compounds 5c and 6 and established the (R) configuration of 7. Thu

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14

Wargo, Matthew J., and Deborah A. Hogan. "Identification of genes required for Pseudomonas aeruginosa carnitine catabolism." Microbiology 155, no. 7 (2009): 2411–19. http://dx.doi.org/10.1099/mic.0.028787-0.

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Carnitine is a quaternary amine compound prevalent in animal tissues, and a potential carbon, nitrogen and energy source for pathogens during infection. Characterization of activities in Pseudomonas aeruginosa cell lysates has previously shown that carnitine is converted to 3-dehydrocarnitine (3-dhc) which is in turn metabolized to glycine betaine (GB), an intermediate metabolite in the catabolism of carnitine to glycine. However, the identities of the enzymes required for carnitine catabolism were not known. We used a genetic screen of the P. aeruginosa PA14 transposon mutant library to ident

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15

Bohnert, Sabine, and Wolf-H. Gündel. "[1.4]Diazepino[6.5-c]chinoline mit L-Aminosäurebaustein — Darstellung und Reaktionen / [1.4]Diazepino[6.5-c]quinolines with L-Amino Acid Moiety — Preparation and Reactions." Zeitschrift für Naturforschung B 42, no. 9 (1987): 1167–73. http://dx.doi.org/10.1515/znb-1987-0918.

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Quaternary salts of the amides of N-(3-quinolinecarbonyl)-N-alkyl-amino acids (6) cyclise under the influence of base to the title compounds (7). This intramolecular addition is a reaction with high diastereoselectivity, dependent on the amino acid part. 7 disproportionates to 8 and 9. 7 behaves as lipophilic NAD model compound in the reaction with 2-propanol under ZnCl2 catalysis.

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16

Dinarvand, Mojdeh, and Malcolm Spain. "Identification of Bioactive Compounds from Marine Natural Products and Exploration of Structure-Activity Relationships (SAR)." Antibiotics 10, no. 3 (2021): 337. http://dx.doi.org/10.3390/antibiotics10030337.

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Marine natural products (MNPs) have been an important and rich source for antimicrobial drug discovery and an effective alternative to control drug resistant infections. Herein, we report bioassay guided fractionation of marine extracts from sponges Lendenfeldia, Ircinia and Dysidea that led us to identify novel compounds with antimicrobial properties. Tertiary amines or quaternary amine salts: aniline 1, benzylamine 2, tertiary amine 3 and 4, and quaternary amine salt 5, along with three known compounds (6–8) were isolated from a crude extract and MeOH eluent marine extracts. The antibiotic a

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17

González, José. "Application of quaternary ammonium compound and aliphatic amine as biocides in the mitigation of microfouling adhered to the internal surface of heat exchangers condensers refrigerated by seawater. Impact on the efficiency of different control strategies applied." Journal of Marine Engineering & Technology 20, no. 1 (2019): 42–51. http://dx.doi.org/10.1080/20464177.2019.1639460.

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18

Holý, Antonín, Miloš Buděšínský, Jaroslav Podlaha, and Ivana Císařová. "Synthesis of Quaternary 1-[2-(Phosphonomethoxy)ethyl] Derivatives of 2,4-Diaminopyrimidine and Related Acyclic Nucleotide Analogs." Collection of Czechoslovak Chemical Communications 64, no. 2 (1999): 242–56. http://dx.doi.org/10.1135/cccc19990242.

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Quaternization of 2,4-diaminopyrimidine (2) by diisopropyl 2-chloroethoxymethanephosphonate (3) followed by bromotrimethylsilane treatment and subsequent hydrolysis gave zwitterionic N1-[2-(phosphonomethoxy)ethyl] derivative, hydrogen {[2-(2,4-diaminopyrimidin-1-io)ethoxy]methyl}phosphonate (5). Its structure was confirmed by X-ray crystallography. The same product was obtained from 2-amino-4-[(dimethylaminomethylene)amino]pyrimidine (6) by an analogous reaction sequence followed by an aqueous ammonia treatment after the transsilylation reaction. Also the quaternizations of 4,6-diaminopyrimidi

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19

Novikov, Andrei, Ekaterina Blinova, Elena Semeleva, et al. "On local anesthetic action of some dimethylacetamide compounds." Research Results in Pharmacology 4, no. 4 (2018): 1–8. http://dx.doi.org/10.3897/rrpharmacology.4.31440.

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The study aim was to explore local anesthetic properties of some tertiary and quaternary derivatives of dimethylacetamide. Materials and methods. The study was performed on white laboratory mice and rats of both sexes, male Agouti guinea pigs, and isolated sciatic nerves of lake frog. In the focus of the study there were two quaternary and eight tertiary compounds of dimethylacetamide with substituted anion with some amino and carbonic acids residue. A local anesthetic property was predicted by computational analysis. Acute toxicity of the most promising substances was studied in mice through

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20

Kuczera, J., S. Witek, T. E. Kral, J. Hładyszowski, J. Łuczyński, and S. Przestalski. "Influence of Some Lysosomotropic Compounds on Calcium Ion Desorption Process from Liposome Membrane." Zeitschrift für Naturforschung C 53, no. 5-6 (1998): 389–97. http://dx.doi.org/10.1515/znc-1998-5-614.

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The effect of a group of model lysosomotropic compounds on the process of Ca2+ ion desorption from lecithin liposome membranes was studied. The compounds studied were: hydrochlorides of fatty acids 2-dimethylaminoethyl esters (DM-n) for n = 9, 11, 13 and 15 carbon atoms in the fatty acid alkyl chain and methochloride of 2-dimethylaminoethyl laurate (DMS-11). It was found that all the compounds studied caused increased desorption with increasing concentration of the compound. Most effective was the quaternary ammonium salt, DMS-11. Moreover, it was found that the process of Ca2+ desorption from

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21

Zhang, Lin Xia, Tao Liu та Ai Qin Luo. "Application of Quaternary Aminated β-Cyclodextrin Ionic Liquid Stationary Phase in Capillary Gas Chromatography". Advanced Materials Research 317-319 (серпень 2011): 1936–39. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.1936.

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Two kinds of quaternary aminated β-cyclodextrin ionic liquids were synthesized and used as stationary phases in capillary gas chromatography. The influences of different counter ions (tetra- borofluoride, bis-trifluoromethanesulfonylimide) were studied. The results indicated that quaternary aminated β-cyclodextrin ionic liquids possessed good column coating properties and a chromatographic separation abilities. The Grobs mixture, alkanes, alcohols and aromatic position isomers, such as xylene, nitrotoluene, dichlorobenzene and cresol were separated well. These quaternary aminated β-cyclodextri

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22

Sheverdov, Vladimir Р., Vera Davydova, Oleg Nasakin, Maksim Mar’yasov, and Olga Lodochnikova. "Ethene-1,1,2,2-tetracarbonitrile and Methanol in the Methylating Reaction of Tertiary Amines to the Quaternary Ammonium Compounds of 1,1-Dicyano-2-methoxy-2-oxoethane-1-ide." Synlett 30, no. 02 (2018): 173–77. http://dx.doi.org/10.1055/s-0037-1610343.

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We discovered a new method to methylate tertiary amines such as urotropine, triethylamine, pyridine, 2-methylpyridine, 4-acetylpyridine, and isonicotinamide, up to quaternary ammonium compounds, with 1,1-dicyano-2-methoxy-2-oxoethane-1-ide being the counterion. Methyl-1,3,5,7-tetraazaadamantan-1-ium 1,1-dicyano-2-methoxy-2-oxoethane-1-ide, N,N-diethyl-N-methylethanaminium 1,1-dicyano-2-methoxy-2-oxoethane-1-ide, and substituted-methylpyridinium 1,1-dicyano-2-methoxy-2-oxoethane-1-ides were synthesized. Quaternary ammonium compounds of 1,1-dicyano-2-methoxy-2-oxothane-1-ide were synthesized wit

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23

Potikha, Lyudmyla M., Volodymyr V. Sypchenko, and Valentyn I. Davydov. "Reactions of [2-(Bromomethyl)phenyl](4-chlorophenyl)methanone: A New Synthesis of [1,3]Thiazolo[3,2-b][2,4]benzodiazepine, Benzimidazo[1,2-b][2,4]benzodiazepine and Benzimidazo[1,2-b][2]benzazepine Derivatives." French-Ukrainian Journal of Chemistry 7, no. 1 (2019): 96–103. http://dx.doi.org/10.17721/fujcv7i1p96-103.

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A new approach to the development of a number of azolo-condensed azepines and diazepines has been proposed. The method for the synthesis of [1,3]thiazolo[3,2-b][2,4]benzodiazepine, benzimidazo[1,2-b][2,4]benzodiazepineandbenzimidazo[1,2-b][2]benzazepinederivatives involves the reaction of [2-(bromomethyl)phenyl](4-chlorophenyl)methanonewith5-methyl-1,3-thiazol-2-amine, 1H-benzimidazol-2-amineand1,2-dimethyl-1H-benzimidazole. The formation of the quaternary salt of the initial diazole has been done under mild conditions in MeCN. The following intramolecular condensation has been realized by hea

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24

Johnson, Stuart, Ervin Kovács, and Michael F. Greaney. "Arylation and alkenylation of activated alkyl halides using sulfonamides." Chemical Communications 56, no. 21 (2020): 3222–24. http://dx.doi.org/10.1039/d0cc00220h.

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López-de-Luzuriaga, José M., Marcus Söldner, Annette Schier, and Hubert Schmidbaur. "Gold(I) Complexes of Open-chain and Cyclic Di-secondary Amines." Zeitschrift für Naturforschung B 52, no. 2 (1997): 209–13. http://dx.doi.org/10.1515/znb-1997-0211.

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Abstract Treatment of N,N′-diisopropyl-ethylenediamine or 1,4-piperazine with two equivalents of [(Ph3P)Au]+ BF4- leads to binuclear complexes of the diamines: {[(Ph3P)Au]HN(iPro)NCH2-}22+ 2 BF4- (1) and {[(Ph3P)Au]HNCH2CH2}22+ 2 BF4- (2), respectively. In the products each quaternary ammonium center bears one gold ligand, one hydrogen atom and two alkyl substituents. The crystal structures of both compounds have been determined. Compound 1 contains discrete ion-triples. The ethylene bridge in the dications is in an unfolded conformation, with a crystallographic center of inversion, and allows

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Shamsuri, Ahmad Adlie, and Siti Nurul Ain Md Jamil. "Application of Quaternary Ammonium Compounds as Compatibilizers for Polymer Blends and Polymer Composites—A Concise Review." Applied Sciences 11, no. 7 (2021): 3167. http://dx.doi.org/10.3390/app11073167.

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A wide variety of quaternary ammonium compounds (QACs) have escalated the attraction of researchers to explore the application of QACs. The compounds have frequently been synthesized through alkylation or quaternization of tertiary amines with alkyl halides. Recently, QACs have been applied to compatibilize polymer blends and polymer composites in improving their thermo-mechanical properties. This concise review concentrates on the application of two types of QACs as compatibilizers for polymer blends and polymer composites. The types of QACs that were effectively applied in the blends and com

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Shakhmaev, Rinat N., Alisa Sh Sunagatullina, and Vladimir V. Zorin. "ISOMERS OF 3-CHLORO-N,N,N-TRIS(3-METHYLBUTYL)PROP-2-EN-1-AMMINIUM CHLORIDE AS COMPLEX OIL AND GAS FIELD REAGENTS WITH ANTIHYDRATE, ANTICORROSIVE AND BACTERICIDAL ACTION." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 63, no. 6 (2020): 80–84. http://dx.doi.org/10.6060/ivkkt.20206306.5969.

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One of the most promising classes of low-dosage hydrate inhibitors is anti-agglomerants, which are favorably characterized by high efficacy at very low working concentrations (0.1-0.5%). We have investigated the possibility of creating new anti-agglomerants with enhanced anticorrosive and bactericidal properties based on the quaternization of tris(3-methylbutyl)amine with (E)- and (Z)-1,3-dichloropropene isomers. It is well known that compounds with a 3-chloroprop-2-enyl fragment have a pronounced anticorrosive and bactericidal action. Thus, the presence in the quaternization products of isope

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Meijide, Francisco, María Pilar Vázquez-Tato, Julio Seijas, et al. "Crystal Structure of a Cationic Bile Salt Derivative ([3,5,7,12]-3-(2-naphthyloylamino)-7,12-dihydroxycholan-24-triethylammonium iodide)." Crystals 9, no. 3 (2019): 135. http://dx.doi.org/10.3390/cryst9030135.

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The crystal structure of the iodide salt of a quaternary ammonium derivative of cholic acid having a naphthalene group attached to the 3rd position of the steroid nucleus through an amide bond ([3,5,7,12]-3-(2-naphthyloylamino)-7,12-dihydroxycholan-24-triethylammonium iodide) has been resolved. The compound crystallizes in the P212121 orthorhombic space group (a/Å = 10.9458(3); b/Å = 12.1625(3); c/Å = 28.4706(7)). The lateral chain adopts a fully extended tttt conformation because the quaternary ammonium group cannot participate in the formation of hydrogen bonds. The iodide ion is involved in

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Bohnert, Sabine, and Wolf-H. Gündel. "Redoxreaktionen mit cyclopeptidartigen Chinolinderivaten als lipophil-maskierte NAD-Modellverbindungen / Redox Reactions with Cyclopeptide-Like Quinoline Derivatives as Lipophilic NAD Model Compounds." Zeitschrift für Naturforschung B 42, no. 9 (1987): 1159–66. http://dx.doi.org/10.1515/znb-1987-0917.

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Quaternary salts of the amides of N-(3-quinolinecarbonyl) amino acids (7) cyclise under the influence of base to give fourteen membered rings (9). This dimerisation is a reaction with high diastereoselectivity. The addition product 9 can be regarded as lipophilic, masked NAD model compound: 9 oxidizes 2-propanol under ZnCl2 catalysis to give in high yield acetone and the 1.4-dihydroquinoline.

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Slavíková, Barbora, Alexander Kasal та Miloš Buděšínský. "Dihydrotestosterone with an Ammonium Centre in the Position 16β". Collection of Czechoslovak Chemical Communications 62, № 4 (1997): 656–64. http://dx.doi.org/10.1135/cccc19970656.

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In an alternative synthesis of 17β-hydroxy-16β-(piperidin-1-yl)-5α-androstan-3-one (4), neighbouring group participation between a 17β-carbonyloxy group and the 16β-amino group was used and a high yield partial hydrolysis of 3β,17β-diacetoxy-16β-(piperidin-1-yl)-5α-androstane (11) was developed. Interference of the neighbouring group participation was also apparent in another 17β-acetoxy derivative - in oxidation of compound 12 to 13. Compound 4 was converted into water-soluble derivatives, i.e. quaternary ammonium derivatives 17 to 20.

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Kula, Natalia, Edyta Mazurkiewicz, and Ewa Obłąk. "Microorganisms and cationic surfactants." Postępy Higieny i Medycyny Doświadczalnej 74 (December 11, 2020): 556–65. http://dx.doi.org/10.5604/01.3001.0014.5776.

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Quaternary ammonium salts (QAS) as cationic surfactants with an amphiphilic structure show biocidal activity against non-pathogenic and pathogenic microorganisms (Gram-positive, Gram-negative bacteria, fungi, as well as lipophilic viruses) occurring in planktonic form or forming biofilms. They can also coat the surface of various materials (glass, metal, silicone, polyester) from which medical devices are made, such as: catheters, implants, heart valves, endoprostheses, and this allows inhibiting the adhesion of microorganisms to these surfaces. In their chemical structure, these surfactants c

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Nazarova, Anastasia, Dmitriy Shurpik, Pavel Padnya, Timur Mukhametzyanov, Peter Cragg, and Ivan Stoikov. "Self-Assembly of Supramolecular Architectures by the Effect of Amino Acid Residues of Quaternary Ammonium Pillar[5]arenes." International Journal of Molecular Sciences 21, no. 19 (2020): 7206. http://dx.doi.org/10.3390/ijms21197206.

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Novel water-soluble multifunctional pillar[5]arenes containing amide-ammonium-amino acid moiety were synthesized. The compounds demonstrated a superior ability to bind (1S)-(+)-10-camphorsulfonic acid (S-CSA) and methyl orange dye depending on the nature of the substituent, resulting in the formation one-to-one complexes with both guests. The formation of host-guest complexes was confirmed by ultraviolet (UV), circular dichroism (CD) and 1H NMR spectroscopy. This work demonstrates the first case of using S-CSA as a chiral template for the non-covalent self-assembly of architectures based on pi

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Liu, Danyang, Zhijian Zhou, and Hao Liu. "The Theoretical Total Synthesis of an Aromatic Esters of the Crinane Amaryllidaceae Alkaloid Ambelline." E3S Web of Conferences 267 (2021): 02011. http://dx.doi.org/10.1051/e3sconf/202126702011.

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ABSTRACT. A series of crinane-type alkaloid ambelline derivatives were assessed for their potency to inhibit both acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE), which has been shown to be effective medicine for the treatment of Alzheimer’s disease. However, no enzyme modification has been reported total synthesis. In this work, two possible theoretical synthesis paths of Crinane-type alkaloid ambelline were discussed in this article. The major difficulty of the proposed synthesis was the synthesis of the quaternary carbon. One of the approaches emphasized on the reactions betwe

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Kawanishi, Ryouta, Shinya Hattori, Seiji Iwasa та Kazutaka Shibatomi. "Amine-Catalyzed Decarboxylative Aldol Reaction of β-Ketocarboxylic Acids with Trifluoropyruvates". Molecules 24, № 15 (2019): 2773. http://dx.doi.org/10.3390/molecules24152773.

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Decarboxylative aldol reaction of aliphatic carboxylic acids is a useful method for C–C bond formation because carboxylic acids are an easily available class of compounds. In this study, we found that the decarboxylative aldol reaction of tertiary β-ketocarboxylic acids and trifluoropyruvates proceeded smoothly to yield the corresponding aldol products in high yields and with high diastereoselectivity in the presence of a tertiary amine catalyst. In this reaction, we efficiently constructed a quaternary carbon center and an adjacent trifluoromethylated carbon center. This protocol was also ext

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35

Cativiela, Carlos, та Marı́a Dolores Dı́az-de-Villegas. "Stereoselective synthesis of quaternary α-amino acids. Part 2: Cyclic compounds". Tetrahedron: Asymmetry 11, № 3 (2000): 645–732. http://dx.doi.org/10.1016/s0957-4166(99)00565-0.

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36

Cativiela, Carlos, та Marı́a Dolores Dı́az-de-Villegas. "Stereoselective synthesis of quaternary α-amino acids. Part 1: Acyclic compounds". Tetrahedron: Asymmetry 9, № 20 (1998): 3517–99. http://dx.doi.org/10.1016/s0957-4166(98)00391-7.

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SAITOH, HIROSHI, NORIKO HASEGAWA, SHINJI KAWAI, KATSUMI MIYAZAKI, and TAKAICHI ARITA. "Interaction of tertiary amines and quaternary ammonium compounds with gastrointestinal mucin." Journal of Pharmacobio-Dynamics 9, no. 12 (1986): 1008–14. http://dx.doi.org/10.1248/bpb1978.9.1008.

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Khunathai, Kanjana, Durga Parajuli, Keisuke Ohto, et al. "Adsorption Behavior of Quaternary Amine Types of Lignophenol Compounds for Some Precious Metals." Solvent Extraction and Ion Exchange 28, no. 3 (2010): 403–14. http://dx.doi.org/10.1080/07366291003683735.

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Guo, Yong. "Analysis of Quaternary Amine Compounds by Hydrophilic Interaction Chromatography/Mass Spectrometry (HILIC/MS)." Journal of Liquid Chromatography & Related Technologies 28, no. 4 (2005): 497–512. http://dx.doi.org/10.1081/jlc-200047200.

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El-Shanawany, Mohamed A., Hanaa M. Sayed, Sabrin R. M. Ibrahim, and Marwa A. A. Fayed. "New Nitrogenous Compounds from Anisotes trisulcus." Zeitschrift für Naturforschung C 69, no. 5-6 (2014): 209–18. http://dx.doi.org/10.5560/znc.2013-0116.

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Re-investigation of the methanolic extract of Anisotes trisulcus (Forssk.) Nees aerial parts led to the isolation of two new tricyclic quinazoline alkaloids, 8-amino-7,8,9,11-tetrahydro-6H-pyrido[2,1-b]- quinazoline-2,6-diol (4) and 8-amino-3,6-dihydroxy-7,8,9-trihydro-6H-pyrido[2,1-b]quinazoline- 11-one (5), and two quaternary ammonium compounds, (dimethylamino)-N-(hydroxymethyl)-N,Ndimethyl methanaminium chloride (6) and N-[(carboxyamino)methyl]-N,N-dimethyl ethanaminium chloride (7), together with three known compounds, peganine (1), vasicinone (2), and anisotine (3). The structures of thes

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41

Korotkii, Y. V., N. A. Vrynchanu, M. L. Dronova, Z. S. Suvorova, and O. A. Smertenko. "Synthesis, antibacterial and antifungal activity of 1-[4-(1,1,3,3-tetramethylbutyl)phenoxy]-3-dialkylamino-2-propanol quaternary salts." Farmatsevtychnyi zhurnal, no. 1 (February 12, 2019): 56–62. http://dx.doi.org/10.32352/0367-3057.1.15.04.

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The emergence and spread of resistant strains of pathogens as well as reduction of the efficacy of current antimicrobial agents requires the development of novel antimicrobial compounds. The aim of the present study was synthesis and evaluation of antimicrobial activity of new arylaliphatic aminopropanols. The objects of the present study were 1-[4-(1,1,3,3-tetramethylbutyl)phenoxy]-3-dialkylamino-2-propanol quaternary salts (compounds I–XIV). Compounds synthesis was carried out by heating of precursor epoxide and excessive amount of appropriate amines in isopropanole, follow

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Donath, Steffen, Holger Militz, and Carsten Mai. "Treatment of wood with aminofunctional silanes for protection against wood destroying fungi." Holzforschung 60, no. 2 (2006): 210–16. http://dx.doi.org/10.1515/hf.2006.035.

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AbstractDifferent aminofunctional silanes were tested for their suitability to preserve wood against basidiomycetes in a mini-block experiment according to EN 113. High effectiveness against the brown rot fungusConiophora puteanawas maintained over prolonged exposure times of up to 18 weeks. Resistance against the white rot fungusTrametes versicolorwas only enhanced in the initial phase of exposure (6 weeks); after longer exposure times of 18 weeks, considerable mass losses were observed. It was shown that the antifungal resistance was caused by the amino groups of the oligomeric silane system

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Ryrfeldt, Åke, and Eskil Hansson. "Biliary Excretion of Quaternary Ammonium Compounds and Tertiary Amines in the Rat." Acta Pharmacologica et Toxicologica 30, no. 1-2 (2009): 59–68. http://dx.doi.org/10.1111/j.1600-0773.1971.tb00634.x.

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Steidl, Jill V., and Andrea J. Yool. "Distinct Mechanisms of Block of Kv1.5 Channels by Tertiary and Quaternary Amine Clofilium Compounds." Biophysical Journal 81, no. 5 (2001): 2606–13. http://dx.doi.org/10.1016/s0006-3495(01)75904-8.

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Schwärzler, Alexander, Gerhard Laus, Volker Kahlenberg, et al. "Quaternary 4-Amino-1,2,4-triazolium Salts: Crystal Structures of Ionic Liquids and N-Heterocyclic Carbene (NHC) Complexes." Zeitschrift für Naturforschung B 64, no. 6 (2009): 603–16. http://dx.doi.org/10.1515/znb-2009-0604.

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Quaternary salts were prepared by reaction of 4-amino-1,2,4-triazole and 4-amino-3,5-dialkyl- 1,2,4-triazoles (alkyl = Me, Et) with dimethyl and diethyl sulfate at ambient temperature. Subsequent ion metathesis gave hexafluorophosphates and bis(trifluoromethylsulfonyl)imides as crystalline derivatives or ionic liquids.Methylation at 100 ◦C gave the 4-(dimethylamino)-1-methyl-1,2,4- triazolium salt, a precursor for a new carbene ligand which was incorporated into Ag and Rh complexes. The synthesis of 5-bromo-4-(dimethylamino)-1-methyl-1,2,4-triazolium hexafluorophosphate is also reported. Cryst

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Chen, Jiayin, Jürgen Brockmöller, Tina Seitz, Jörg König, Mladen V. Tzvetkov, and Xijing Chen. "Tropane alkaloids as substrates and inhibitors of human organic cation transporters of the SLC22 (OCT) and the SLC47 (MATE) families." Biological Chemistry 398, no. 2 (2017): 237–49. http://dx.doi.org/10.1515/hsz-2016-0236.

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Abstract Tropane alkaloids and their derivatives are anticholinergic drugs with narrow therapeutic range. Here we characterize the organic cation transporters from the SLC22 (OCT1, OCT2, and OCT3) and the SLC47 families (MATE1 and MATE2-K) as potential mediators of the renal and extra-renal excretion, the two major roads of elimination of these substances. All analyzed compounds inhibited and the quaternary amine derivatives ipratropium and trospium were strongly transported by OCTs and MATEs. Overexpression of OCTs or MATEs in HEK293 cells resulted in an up to 63-fold increase in the uptake o

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Yu, Xin Yang, Liu Yin Xia, Shuai Wang, and Hong Zhong. "The Synthesis of Novel Organosilicon Collector QAS222 and its Flotation Performance on Aluminosilicate Minerals." Advanced Materials Research 233-235 (May 2011): 2113–18. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.2113.

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In the article the organosilicon Quaternary Ammonium surfactant QAS222 was synthesized by one step reaction from silicane coupling agent and dodecyl amine, and its collecting ability to aluminosilicate minerals was investigated. The results showed that the percent conversion of dodecyl amine was more than 95% and the content of novel organosilicon in the production was about 96.53% when reaction was conducted at 80°C for 37 hours, with silicane coupling agent: N, N-Dimethyl dodecyl amine: KI=1.1:1:0.01 by the molar ratio, using anhydrous ethanol as solvent, protecting the reacting system with

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Valenta, Vladimír, Jiří Holubek, Emil Svátek, and Miroslav Protiva. "Synthesis of 4-methoxyphenoxyacetic and 3,4,5-trimethoxyphenoxyacetic acid amides and hydrazides as potential neurotropic and cardiovascular agents." Collection of Czechoslovak Chemical Communications 52, no. 12 (1987): 3013–23. http://dx.doi.org/10.1135/cccc19873013.

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4-Methoxyphenoxyacetyl chloride, 3,4,5-trimethoxyphenoxyacetic acid and its methyl ester were reacted with 2-phenylethylamine, 1-benzylpiperazine, 1-(2-phenylethyl)piperazine, 1-(1-phenyl-2-propyl)piperazine, isopropylhydrazine, 1-aminopiperidine, and 4-aminomorpholine and afforded the amides and hydrazides Iab-IVab and Vb-VIIIb. 1-Amino-4-methylpiperazine and 1-amino-4-phenylpiperazine were transformed to the hydrazones XV and XVI, and to the quaternary salts XVII and XVIII. Pharmacological screening showed indications of thymoleptic activity with compounds Ia-IIIa, anorectic effect with IIa

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Mondrzyk, Adam, Julian Fischer, and Helmut Ritter. "Antibacterial materials: structure-bioactivity relationship of epoxy-amine resins containing quaternary ammonium compounds covalently attached." Polymer International 63, no. 7 (2014): 1192–96. http://dx.doi.org/10.1002/pi.4690.

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Cativiela, Carlos, та Maria Dolores Diaz-de-Villegas. "ChemInform Abstract: Stereoselective Synthesis of Quaternary α-Amino Acids. Part 2. Cyclic Compounds". ChemInform 31, № 23 (2010): no. http://dx.doi.org/10.1002/chin.200023253.

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