Relevant bibliographies by topics / Mercury compounds. Amines. Nitroaniline

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Academic literature on the topic 'Mercury compounds. Amines. Nitroaniline'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Mercury compounds. Amines. Nitroaniline"

1

Borys, Krzysztof M., Maciej D. Korzyński, and Zbigniew Ochal. "Derivatives of phenyl tribromomethyl sulfone as novel compounds with potential pesticidal activity." Beilstein Journal of Organic Chemistry 8 (February 15, 2012): 259–65. http://dx.doi.org/10.3762/bjoc.8.27.

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A halogenmethylsulfonyl moiety is incorporated in numerous active herbicides and fungicides. The synthesis of tribromomethyl phenyl sulfone derivatives as novel potential pesticides is reported. The title sulfone was obtained by following three different synthetic routes, starting from 4-chlorothiophenol or 4-halogenphenyl methyl sulfone. Products of its subsequent nitration were subjected to the SNAr reactions with ammonia, amines, hydrazines and phenolates to give 2-nitroaniline, 2-nitrophenylhydrazine and diphenyl ether derivatives. Reduction of the nitro group of 4-tribromomethylsulfonyl-2-nitroaniline yielded the corresponding o-phenylenediamine substrate for preparation of structurally varied benzimidazoles.
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2

Yunnikova, Lidiya P., Yuliya E. Likhareva, and Svetlana Yu Balandina. "N-TROPYLATION OF ARYLAMINES." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 62, no. 2 (February 8, 2019): 79–84. http://dx.doi.org/10.6060/ivkkt.20196202.5751.

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An efficient method for introduction of biogenic tropylium cycle into aromatic amines molecules is offered. Introduction is carried out in the presence of imidazole as a strong base. Interaction between tropylium salts (tetrafluoroborate or perchlorate) and aromatic amines with either nitro- or acetyl groups (meta-nitroaniline, para-nitroaniline, 2-methyl-4-nitroaniline and para-acetylaniline) as electron-acceptor substituents in the benzol ring results in stable products resulting from substitution of the hydrogen atom in the amino group of aromatic amines, namely: 4-nitro-N-(1'-cyclohepta-2',4',6'-trienil)aniline, 2-methyl-4-nitro-N-(1'-cyclohepta-2',4',6'-trienil)aniline, 3-nitro-N-(1'-cyclohepta-2',4',6'-trienil)aniline, 4-acetyl-N-(1'-cyclohepta-2',4',6'-trienil)aniline. The yields of the compounds obtained attain 60-87%. In this process, imidazole forms with the tropylium cation a complex which (1) serves as a carrier of tropylium ion to the nitrogen atom of aromatic amine, thus lightening the electrophilic substitution process at the hydrogen atom of the amino group; (2) prevents the dehydration process of resulting N-(1'-cyclohepta-2',4',6'-trienil) anilines. The latter phenomenon is an advantage in comparison with the method in which the dehydration process results in unstable N-aryl-8-azaheptafulvenes instead of stable N-tropylated anilines. The structure of the compounds obtained is confirmed by the method of mass spectrometry, NMR on protium nuclei and XRD analysis for 4-nitro-N-(1'-cyclohepta-2',4',6'-trienil)aniline. Antimicrobial activity is studied on conditionally pathogenic St. aureus 906, C. albicans ATCC 24433 and E. coli 1257 strains. The investigation results show all the synthesized compounds to exhibit antimicrobial activity. The compounds N-(3-nitrophenyl)cyclohepta-2,4,6-trienamine and N-(4-acylphenyl)cyclohepta-2,4,6-trienamine at concentration 125 microgram/ml are ascertained to exhibit inhibitory action on growth and development of the test strains, with this effect being less expressed for compounds N-(4-nitrophenyl)cyclohepta-2,4,6-trienamine and N-(2-methyl-4-nitrophenyl)cyclohepta-2,4,6-trienamine.
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3

Punrattanasin, Nattaya. "Investigation of Ultraviolet Protection Properties of Cotton Fabric via Azoic Dyeing with Green Tea Extract." Advanced Materials Research 331 (September 2011): 279–82. http://dx.doi.org/10.4028/www.scientific.net/amr.331.279.

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Green tea dyeing of cotton fabric via azoic combination method was investigated in order to improve ultraviolet protection properties without the application of polutting metal mordants. Three types of diazonium salts were prepared from three different primary aromatic amines (aniline, p-nitroaniline and 2,4 dichoroaniline) and subsequently, reacted with pretreated cotton fabric with coupling component or polyphenolic compounds found in green tea extract to form an azo dye inside the cellulose matrix. The result showed that as the strength of electron withdrawing groups of the substituents in the primary aromatic amines increase, both color strength and ultraviolet protection factor (UPF) of dyed fabrics dramically increased.
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4

Möhrle, Hans, and Wolfgang Vetter. "Reaktionsbeteiligung von Phosphonester-Nachbargruppen bei Amindehydrierungen / Participation of Phosphonate Neighbour Groups with Dehydrogenations of Amines." Zeitschrift für Naturforschung B 43, no. 12 (December 1, 1988): 1662–71. http://dx.doi.org/10.1515/znb-1988-1222.

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Abstract Aminomethanephosphonate. Mercury EDTA Dehydrogenation. Lactam. Formamide, Aminoalkylation Aminophosphonates 1-5 are dehydrogenated with mercury EDTA to the corresponding lactams 6-9 and surprisingly to the formamide derivative 10, The different rate of ester hydrolysis of these acylamine compounds, the steric requirements and the reaction mechanisms are dis-cussed.
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5

Pietruk, Konrad, Marta Piątkowska, and Małgorzata Olejnik. "Electrochemical reduction of azo dyes mimicking their biotransformation to more toxic products." Journal of Veterinary Research 63, no. 3 (September 13, 2019): 433–38. http://dx.doi.org/10.2478/jvetres-2019-0044.

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Abstract Introduction Some azo dyes, including Sudans I–IV and Para Red, are genotoxic and may be biotransformed to cancerogenic aromatic amines. They are banned as food and feed additives, but their presence has been detected in food. Aromatic amines are also considered potentially toxic. Online EC–MS is a promising tool to study the transformation mechanisms of xenobiotics such as azo dyes. The aim of the study was to investigate emulation of how azo dyes are enzymatically transformed to amines with EC–MS. Material and Methods The reduction reactions of five azo dyes (Sudans I–IV and Para Red) were conducted using a glassy carbon working electrode and 0.1% formic acid in acetonitrile. Reduction results were compared with the literature and in silico to select preliminary candidates for metabolites. The LC-MS/MS method was used to confirm results obtained by electrochemical reactor. Results A limited number of pre-selected compounds were confirmed as azo dyes metabolites – aniline for Sudan I, aniline and 4-aminoazobenzene for Sudan III, o-toluidine for Sudan IV, and 4-nitroaniline for Para Red. No metabolites were found for Sudan II. Conclusions Electrochemistry–mass spectrometry was successfully applied to azo dyes. This approach may be used to mimic the metabolism of azo dyes, and therefore predict products of biotransformation.
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6

Löser, Reik, Steffen Fischer, Achim Hiller, Martin Köckerling, Uta Funke, Aurélie Maisonial, Peter Brust, and Jörg Steinbach. "Use of 3-[18F]fluoropropanesulfonyl chloride as a prosthetic agent for the radiolabelling of amines: Investigation of precursor molecules, labelling conditions and enzymatic stability of the corresponding sulfonamides." Beilstein Journal of Organic Chemistry 9 (May 27, 2013): 1002–11. http://dx.doi.org/10.3762/bjoc.9.115.

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3-[18F]Fluoropropanesulfonyl chloride, a recently proposed prosthetic agent for fluorine-18 labelling, was prepared in a two-step radiosynthesis via 3-[18F]fluoropropyl thiocyanate as an intermediate. Two benzenesulfonate-based radiolabelling precursors were prepared by various routes. Comparing the reactivities of 3-thiocyanatopropyl nosylate and the corresponding tosylate towards [18F]fluoride the former proved to be superior accounting for labelling yields of up to 85%. Conditions for a reliable transformation of 3-[18F]fluoropropyl thiocyanate to the corresponding sulfonyl chloride with the potential for automation have been identified. The reaction of 3-[18F]fluoropropanesulfonyl chloride with eight different aliphatic and aromatic amines was investigated and the identity of the resulting 18F-labelled sulfonamides was confirmed chromatographically by comparison with their nonradioactive counterparts. Even for weakly nucleophilic amines such as 4-nitroaniline the desired radiolabelled sulfonamides were accessible in satisfactory yields owing to systematic variation of the reaction conditions. With respect to the application of the 18F-fluoropropansulfonyl group to the labelling of compounds relevant as imaging agents for positron emission tomography (PET), the stability of N-(4-fluorophenyl)-3-fluoropropanesulfonamide against degradation catalysed by carboxylesterase was investigated and compared to that of the analogous fluoroacetamide.
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7

Möhrle, H., and J. Mehrens. "Reaktivität nitrophenylsubstituierter cyclischer Amine bei Dehydrierungen / The Reactivity of Nitrophenyl Substituted Cyclic Amines with Dehydrogenations." Zeitschrift für Naturforschung B 53, no. 1 (January 1, 1998): 37–48. http://dx.doi.org/10.1515/znb-1998-0109.

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Piperidine and perhydroazepine bearing a 1 -(4-nitrophenyl) substituent were inert to mercury-edta, while the a-pipecoline derivative gave an aminoketone with cleavage of the heterocycle. However the corresponding (2-nitrophenyl) compounds reacted to give respectively a piperidin-2-one, an aminopentanal and an aminohexanone.By an additional substituent in 2′-position the p-nitro compounds underwent dehydrogenation too. With a methyl group resulted a pattern analogous to o-nitro products. A neighbouring hydroxymethyl function enhanced the reaction with formation of benzoxazines and if possible their further oxidized derivatives, the hydroxylactams.
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8

Fletcher, James T., Matthew D. Hanson, Joseph A. Christensen, and Eric M. Villa. "Revisiting ring-degenerate rearrangements of 1-substituted-4-imino-1,2,3-triazoles." Beilstein Journal of Organic Chemistry 14 (August 10, 2018): 2098–105. http://dx.doi.org/10.3762/bjoc.14.184.

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The 1-substituted-4-imino-1,2,3-triazole motif is an established component of coordination compounds and bioactive molecules, but depending on the substituent identity, it can be inherently unstable due to Dimroth rearrangements. This study examined parameters governing the ring-degenerate rearrangement reactions of 1-substituted-4-imino-1,2,3-triazoles, expanding on trends first observed by L’abbé et al. The efficiency of condensation between 4-formyltriazole and amine reactants as well as the propensity of imine products towards rearrangement was each strongly influenced by the substituent identity. It was observed that unsymmetrical condensation reactions conducted at 70 °C produced up to four imine products via a dynamic equilibrium of condensation, rearrangement and hydrolysis steps. Kinetic studies utilizing 1-(4-nitrophenyl)-1H-1,2,3-triazole-4-carbaldehyde with varying amines showed rearrangement rates sensitive to both steric and electronic factors. Such measurements were facilitated by a high throughput colorimetric assay to directly monitor the generation of a 4-nitroaniline byproduct.
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9

Ivanova, Christina Y., Mikhail V. Kuzmin, Oleg A. Kolyamshin, and Nikolay I. Koltsov. "Synthesis and study of polyfunctional silicon-containing amines as adhesion promoters of epoxyamine compounds." Butlerov Communications 64, no. 11 (November 30, 2020): 28–32. http://dx.doi.org/10.37952/roi-jbc-01/20-64-11-28.

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At present, in order to obtain high-tech hybrid products, high demands are placed on modern adhesives for creating durable joints between dissimilar materials. It is known that adhesion depends on the compatibility of the adhesives with the surfaces of the materials. For epoxy compositions, amine compounds are the main hardeners. In this regard, in the presented work, silicon-containing amines were synthesized based on polyfunctional aminoalkoxysiloxanes for epoxy compositions, the strength of attachment of which to various metal substrates was studied using these adhesion promoters. Aminoalkoxysiloxanes were prepared by reacting 3-aminopropyltriethoxysilane with monoethanolamine in nitrogen at atmospheric pressure in the presence of a binary antioxidant and catalytic amounts of an alkali metal alcoholate. To carry out the reaction in a homogeneous phase, the reaction mixture was heated to a temperature of 100-110 °C and distilled off to 90% of ethanol from the theoretically calculated amount. Further, the reaction was carried out at a reduced temperature of 10-20 millimeter of mercury pressure until the release of alcohol stops. At the same time, gravimetric control was carried out and the refractive index of the reaction mixture was measured. As a result, aminoalkoxysilanes were obtained in the form of light-yellow oily liquids. The structure of the obtained compounds was investigated by IR-spectroscopy on a Fourier spectrophotometer FSM-1202 and 1H NMR-spectroscopy on a high-resolution BrukerWM-250 NMR-spectrometer. It was found that under the selected synthesis conditions, aminopropyl-tri-(2-aminoethoxy)silane is obtained with the highest yield of 97.6% at a molar ratio of 3-aminopropyltriethoxysilane (AGM-9) with monoethanolamine 1: 3. The obtained compounds were used in the composition of epoxy compounds in order to improve their physical and mechanical properties. The adhesion properties of epoxy compositions based on ED-22 epoxy resin and isophorone diamine were studied using synthesized polyfunctional aminoalkoxysiloxanes as adhesion promoters. It was found that the most effective adhesion promoter is aminopropyl-tri-(2-aminoethoxy) silane.
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10

Deborah, S., and J. Sebastin Raj. "Bioremediation of heavy metals from Distilleries Effluent using Microbes." Journal of Applied and Advanced Research 1, no. 2 (August 24, 2016): 23. http://dx.doi.org/10.21839/jaar.2016.v1i2.21.

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One of the major universal threats is water pollution. The untreated distilleries effluent discharge into the environment creates a serious problem to the living systems. It may contain carcinogenic aromatics amines, dyes, organic and inorganic chemical compounds. The physicochemical characterization of effluent was collected from Trichy Distilleries & Chemicals pvt Ltd, Tiruchirappalli, Tamilnadu, India and the chemical analyzed in Soil Testing Laboratory, Tiruchirappalli. The effluent was analyzed by different parameters. The physical parameters are BOD, COD, and DO, TDS, pH and electrical conductivity. Heavy metal analysis included Zinc, Lead, Manganese, Arsenic, Iron, Mercury, Copper, Chromium, Cadmium and Nickel. The soil sample was taken from Trichy Distilleries and Chemicals Ltd and analyzed by serial dilution technique. The three microbes such as Escherichia coli, Bacillus subtilis and Pseudomonas putida, were isolated from soil source. The isolated organism was treated with the effluent for various concentrations in various hours. The metal accumulations were identified in soil test lab, Trichy. The hyper accumulations of metal in microbes were identified. The present study explores the effectiveness of bioremediation has a simultaneous removal of Zinc, Lead, Manganese, Arsenic, Iron, Mercury, Copper, Chromium, Cadmium and Nickel from the distilleries effluent. Bacillus subtilis bacterial strains effectively remove the heavy metal from the distilleries effluent.
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