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Journal articles on the topic 'S-triazines'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Liu, Xianxian, and Rebecca E. Parales. "Bacterial Chemotaxis to Atrazine and Related s-Triazines." Applied and Environmental Microbiology 75, no. 17 (July 6, 2009): 5481–88. http://dx.doi.org/10.1128/aem.01030-09.

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ABSTRACT Pseudomonas sp. strain ADP utilizes the human-made s-triazine herbicide atrazine as the sole nitrogen source. The results reported here demonstrate that atrazine and the atrazine degradation intermediates N-isopropylammelide and cyanuric acid are chemoattractants for strain ADP. In addition, the nonmetabolized s-triazine ametryn was also an attractant. The chemotactic response to these s-triazines was not specifically induced during growth with atrazine, and atrazine metabolism was not required for the chemotactic response. A cured variant of strain ADP (ADP M13-2) was attracted to s-triazines, indicating that the atrazine catabolic plasmid pADP-1 is not necessary for the chemotactic response and that atrazine degradation and chemotaxis are not genetically linked. These results indicate that atrazine and related s-triazines are detected by one or more chromosomally encoded chemoreceptors in Pseudomonas sp. strain ADP. We demonstrated that Escherichia coli is attracted to the s-triazine compounds N-isopropylammelide and cyanuric acid, and an E. coli mutant lacking Tap (the pyrimidine chemoreceptor) was unable to respond to s-triazines. These data indicate that pyrimidines and triazines are detected by the same chemoreceptor (Tap) in E. coli. We showed that Pseudomonas sp. strain ADP is attracted to pyrimidines, which are the naturally occurring structures closest to triazines, and propose that chemotaxis toward s-triazines may be due to fortuitous recognition by a pyrimidine chemoreceptor in Pseudomonas sp. strain ADP. In competition assays, the presence of atrazine inhibited chemotaxis of Pseudomonas sp. strain ADP to cytosine, and cytosine inhibited chemotaxis to atrazine, suggesting that pyrimidines and s-triazines are detected by the same chemoreceptor.

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2

Jain, Sonika, Pankaj Kumar Jain, Shalu Sain, Dharma Kishore, and Jaya Dwivedi. "Anticancer s-Triazine Derivatives: A Synthetic Attribute." Mini-Reviews in Organic Chemistry 17, no. 8 (December 24, 2020): 904–21. http://dx.doi.org/10.2174/1570193x17666200131111851.

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1, 3, 5-Triazine (s-Triazine) is a versatile nucleus to design and develop potent bioactive molecules for drug discovery, particularly in cancer therapy. The aim of this review is to present the most recent trends in the field of synthetic strategies made for functionalized triazine derivatives active against cell proliferation. This review article covers the synthesis of aryl methylamino, morpholino, triamino substituted triazines, antimitotic agents coupled triazines and many more. Many 1,3,5- triazine derivatives, both hetero-fused and uncondensed, have shown remarkable antitumor activities. We have highlighted various derivatives with 1, 3, 5-triazine core targeting different kinases with an aim to help researchers for developing new 1, 3, 5-triazine derived compounds for antitumor activity.

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3

Jockers, R., and R. D. Schmid. "Synthesis of Long-Chain Triazine Aldehydes - Substrates of Bacterial Luciferase and Photosynthetic Inhibitors." Zeitschrift für Naturforschung C 47, no. 7-8 (August 1, 1992): 573–79. http://dx.doi.org/10.1515/znc-1992-7-814.

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S-triazines are photosynthetic inhibitors. They have been substituted with ω-aminoundecanoic acid. The coupling products have been transformed into triazine aldehydes. These compounds displace radioactive terbutryn and have inhibitory effects on photosynthesis in plants and bacteria. Triazine aldehydes were shown to be effective substrates for bacterial luciferase. A competitive assay between photosystem-II-herbicides and aldehyde-labeled triazines is discussed.

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4

Paciorek, K. J. L., D. H. Harris, J. H. Nakahara, M. E. Smythe, and R. H. Kratzer. "Phospa-s-triazines. X. Thiophenyl-substituted phospha-s-triazines." Journal of Fluorine Chemistry 29, no. 4 (September 1985): 399–415. http://dx.doi.org/10.1016/s0022-1139(00)85105-2.

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5

Paciorek, K. J. L., D. H. Harris, M. E. Smythe, J. H. Nakahara, and R. H. Kratzer. "Phospha-S-triazines. VIII. Chloro-substituted diphospha-S-triazines." Journal of Fluorine Chemistry 28, no. 4 (July 1985): 387–98. http://dx.doi.org/10.1016/s0022-1139(00)81129-x.

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6

Paciorek, K. J. L., J. H. Nakahara, M. E. Smythe, D. H. Harris, and R. H. Kratzer. "Phospha-S-triazines. IX. Chloro-substituted monophospha-S-triazines and derivatives." Journal of Fluorine Chemistry 28, no. 4 (July 1985): 441–52. http://dx.doi.org/10.1016/s0022-1139(00)81134-3.

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7

Meng, Qi, Gui Yong Wu, Ying Shao, and Xiao Qiang Sun. "Convenient Synthesis and Characterization of Star-Shaped Dendrimers: 2,4,6-Trisubstituted 1,3,5-Triazine Derivatives." Advanced Materials Research 396-398 (November 2011): 2476–84. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.2476.

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A serial of novel star-shaped 2,4,6-trisubstituted 1,3,5-triazine (s-triazine) dendrimers were synthesized via step-by-step nucleophilic substitution starting from 2,4,6-trichloro-1,3,5-triazine, and were characterized by1H,13C NMR, FT-IR and ESI-MS spectra. The crystal structures for 2b, 2d and 4c have been determined by X-ray diffraction analysis, which indicate that there are hydrogen bonding and short contact interactions existing in intermolecules result in forming three-dimensional network architecture. D NMR experiments demonstrate that symmetrical trialkylamino-s-triazine shows correlated rotations of its N(2-ethoxy-2-oxoethyl) groups, while unsymmetrical 2-R-4,6-bis(dialkylamino)-s-triazines display two non-equivalent N(2-ethoxy-2-oxoethyl) groups, issued from the restricted rotation about the created C(s-triazine)-N bonds, and was conformed by crystallographic data.

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8

Marx, A., and T. Giersch. "Immunoaffinity Chromatography of s-Triazines." Analytical Letters 28, no. 2 (January 1995): 267–78. http://dx.doi.org/10.1080/00032719508000321.

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9

Mijin, Dusan, Dusan Antonovic, and Bratislav Jovanovic. "Gas chromatographic retention indices for N-substituted amino s-triazines on capillary columns. Part V. Temperature dependence of the retention index." Journal of the Serbian Chemical Society 68, no. 11 (2003): 825–31. http://dx.doi.org/10.2298/jsc0311825m.

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The temperature dependence of the retention index was studied for N-substituted amino s-triazines on DB-1, DB-5 and DB-WAX capillary columns within the temperature range 190?230 ?C. Two linear equations with the column temperature and its reciprocal as variables were studied. The first one shows a slightly better precision for 2,4-bis(alky lamino)-6-chloro-s-triazines and 2-alkylamino-4,6-dichloro-s-triazines while the second one shows a better precision for 2,4-bis(cycloalkylamino)-6-chloro-s-triazines.

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10

Stamper, David M., Mark Radosevich, Kevin B. Hallberg, Samuel J. Traina, and Olli H. Tuovinen. "Ralstonia basilensisM91-3, a denitrifying soil bacterium capable of usings-triazines as nitrogen sources." Canadian Journal of Microbiology 48, no. 12 (December 1, 2002): 1089–98. http://dx.doi.org/10.1139/w02-113.

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The purpose of this study was to characterize the phylogenetic and phenotypic traits of M91-3, a soil bacterium capable of mineralizing atrazine (2-chloro-4-N-isopropyl-6-N-ethyl-s-triazine). The isolate was identified as Ralstonia basilensis based on 99.5% homology of the 16S rRNA sequence and various chemotaxonomic data. The isolate used atrazine as the sole source of energy, carbon, and nitrogen. It could also use several other s-triazines as nitrogen sources. Ralstonia basilensis M91-3 was capable of denitrification, which was confirmed by gas chromatographic analysis of nitrous oxide under acetylene blockage conditions.Key words: atrazine biodegradation, denitrification, herbicide degrader, Ralstonia basilensis, triazine degradation.

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11

Popa, Flavia, Pedro Lameiras, Eric Henon, Oana Moldovan, Agathe Martinez, Carmen Bâtiu, Yvan Ramondenc, and Mircea Darabantu. "Amino-s-triazines — Synthesis and stereochemistry of restricted rotational phenomena — First use of a C-2-substituted serinol in tandem with masked 4-piperidone for selective amination of cyanuric chloride." Canadian Journal of Chemistry 89, no. 10 (October 2011): 1207–21. http://dx.doi.org/10.1139/v11-075.

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Starting from 4-piperidone monohydrate hydrochloride (or the hydrochloride of its ethylene ketal) alone, otherwise in tandem with a C-2-substituted 2-aminopropane-1,3-diol (“serinol”) as amino-nucleophiles in reaction with cyanuric chloride, the synthesis of novel N-substituted amino-s-triazines is reported. The stereochemistry of rotational phenomena occurring about the newly created C(s-triazine)–N< (exocyclic) partial double bonds in the title compounds, seen as new dendritic building blocks, is discussed.

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12

Douarre, L., R. Arnaud, J. Lemaire, A. Deflandre, and H. Richard. "Photochemical study of substituted s-triazines." Journal of Photochemistry and Photobiology A: Chemistry 96, no. 1-3 (May 1996): 71–78. http://dx.doi.org/10.1016/1010-6030(95)04271-7.

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13

Gu, Quan, Xuezhong Gong, Qiaohui Jia, Jianni Liu, Ziwei Gao, Xuxu Wang, Jinlin Long, and Can Xue. "Compact carbon nitride based copolymer films with controllable thickness for photoelectrochemical water splitting." Journal of Materials Chemistry A 5, no. 36 (2017): 19062–71. http://dx.doi.org/10.1039/c7ta06081e.

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Carbon nitride based copolymer films consisting of tri-s-triazines and s-triazines are in situ grown on various substrates and exhibit excellent photoelectrochemical performance, which is attributed to strong visible light harvesting transport.

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14

Duynstee, E. F. J., and Th Veerkamp. "Triazine isocyanates: Part II: Reaction of 2,4-diamino-s-triazines with ethyl chlorocarbonate." Recueil des Travaux Chimiques des Pays-Bas 81, no. 3 (September 2, 2010): 241–54. http://dx.doi.org/10.1002/recl.19620810311.

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15

Dahlous, Kholood, Zainab Almarhoon, Ahmed-Yacine Badjah-Hadj-Ahmed, Zeid AL Othman, and Ayman El-Faham. "Microwave Irradiation Assists the Synthesis of a Novel Series of bis-Arm s-Triazine Oxy-Schiff Base and Oxybenzylidene Barbiturate Derivatives." Molecules 23, no. 11 (November 14, 2018): 2976. http://dx.doi.org/10.3390/molecules23112976.

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A novel series of s-triazines incorporating 4-hydroxybenzaldehyde and 4-hydroxy-3-methoxybenzaldehyde was prepared and fully characterized. The reaction was carried out via stepwise nucleophilic aromatic substitution of chlorine atoms in cyanuric chloride. The first chlorine was substituted by different amines (morpholine, piperidine, or diethylamine) to afford 2,4-dichloro-6-substituted-1,3,5-triazine. The second and third chlorines were substituted by benzaldehyde derivatives in the presence of Na2CO3 as a HCl scavenger to afford the target products: s-triazine oxyaldehyde derivatives (dipodal). The dipodal derivatives were reacted with acid hydrazide, hydralazine, barbituric, or thiobarbituric acid derivatives using conventional heating or microwave irradiation to afford the di-arm s-triazine oxy-Schiff base and oxybenzylidene barbiturate derivatives in good yields. Microwave irradiation done in less solvent afforded the target product in less reaction time with good yield and purity. These types of derivatives might have special interest in coordination and medicinal chemistry.

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16

Patel, Rahul V., Premlata Kumari, and Kishor H. Chikhalia. "Fluorinated s-Triazinyl Piperazines as Antimicrobial Agents." Zeitschrift für Naturforschung C 66, no. 7-8 (August 1, 2011): 345–52. http://dx.doi.org/10.1515/znc-2011-7-805.

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A series of 1,3,5-triazine derivatives that contain 4-amino-2-trifl uoromethyl-benzonitrile, 8-hydroxyquinoline, and different piperazines as substituents at the carbon atoms of the triazine ring have been synthesized by a simple and efficient synthetic protocol. The chemical structures of the compounds were elucidated with the aid of IR, 1H NMR and 13C NMR spectroscopy, and elemental analysis. The antimicrobial activity of the compounds was tested against seven bacteria (Staphylococcus aureus MTCC 96, Bacillus cereus MTCC 619, Escherichia coli MTCC 739, Pseudomonas aeruginosa MTCC 741, Klebsiella pneumoniae MTCC 109, Salmonella typhi MTCC 733, Proteus vulgaris MTCC 1771) and four fungi (Aspergillus niger MTCC 282, Aspergillus fumigatus MTCC 343, Aspergillus clavatus MTCC 1323, Candida albicans MTCC 183). The results indicate that some of the novel s-triazines have noteworthy activity in minimum inhibitory concentration as well as agar diffusion tests.

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17

GAYNOR, J. D., J. A. STONE, and T. J. VYN. "TILLAGE SYSTEMS AND ATRAZINE AND ALACHLOR RESIDUES ON A POORLY DRAINED SOIL." Canadian Journal of Soil Science 67, no. 4 (November 1, 1987): 959–63. http://dx.doi.org/10.4141/cjss87-091.

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Seasonal residues of an acetanilide and triazine herbicide were monitored in ridge, conventional, and zero tillage systems. Alachlor (2-chloro-2′,6′-diethyl-N-(methoxymethyl)acetanilide), and atrazine (2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine) residues were less than 8% of the spring application concentration at the end of the growing season. Moldboard plowing in the fall reduced herbicide residues in spring because of soil dilution by plowing to greater than the sampling depth. Ridge tillage systems had higher spring residues apparently because of reduced herbicide dissipation on the drier ridge tops. The higher residues of the triazines on ridge tops may be injurious to triazine sensitive crops. Key words: Herbicide, till-plant, ridge tillage, des-ethyl atrazine

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18

Shah, Dhruvin R., Rahul P. Modh, and Kishor H. Chikhalia. "Privileged s-triazines: structure and pharmacological applications." Future Medicinal Chemistry 6, no. 4 (March 2014): 463–77. http://dx.doi.org/10.4155/fmc.13.212.

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19

Lo, W. J., Y. L. Hong, R. H. Lin, and Jin-Long Hong. "Tri-substituted s-Triazines as Mesogenic Cores." Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 308, no. 1 (December 1997): 133–46. http://dx.doi.org/10.1080/10587259708045101.

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20

Erickson, Larry E., Kyung Hee Lee, and Darrell D. Sumner. "Degradation of atrazine and related s‐triazines." Critical Reviews in Environmental Control 19, no. 1 (January 1989): 1–14. http://dx.doi.org/10.1080/10643388909388356.

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21

Morita, E., A. B. Sullivan, and A. Y. Coran. "Vulcanization Chemistry." Rubber Chemistry and Technology 58, no. 2 (May 1, 1985): 284–94. http://dx.doi.org/10.5254/1.3536066.

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Abstract Prevulcanization inhibitors based on triazines can be prepared. In each case the triazine ring is amino-substituted such that one or two of the amino hydrogen atoms per amino-group are alkylthio- or arylthio-substituted. The new triazine-derived prevulcanization inhibitors are extremely active in accelerated sulfur vulcanization of diene rubbers (e.g., NR or SBR). Differing accelerators or accelerator systems may require different triazine-derived prevulcanization inhibitors for best results. Provided that the reactivity of the inhibitor is sufficiently near the ideal, its weight-basis activity is greatest when its equivalent weight per S—N bond is least. Overall, hexakis(cyclohexylthio)melamine and especially hexakis(isopropylthio)melamine are the most effective premature vulcanization inhibitors tested, on an equal-weight basis.

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22

De Laat, J., M. Doré, and H. Suty. "Oxydation de S-triazines par les procédés d'oxydation radicalaire. Sous-produits de réaction et constantes cinétiques de réaction." Revue des sciences de l'eau 8, no. 1 (April 12, 2005): 23–42. http://dx.doi.org/10.7202/705211ar.

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L'étude bibliographique montre que l'oxydation de l'atrazine en milieu aqueux par 03, 03/H202, 03/UV, H202/UV et TiO2/UV ne permet qu'une dégradation limitée du pesticide (pas d'ouverture de l'hétérocycle azoté). Ces procédés d'oxydation conduisent aux mêmes sous-produits d'oxydation. Les composés N-déalkylés, les acétamido-s-triazines et l'hydroxyatrazine constituent les premiers sous-produits de dégradation de l'atrazine. Une oxydation plus poussée conduit par des réactions de N-déalkylation, d'hydroxylation et de déamination à la formation de produits finals relativement stables comme la déséthyldésisopropylatrazine, l'amméline, l'ammélide et l'acide cyanurique. La distribution des différents sous-produits en cours d'oxydation dépend du procédé d'oxydation utilisé, des conditions de mise en oeuvre du procédé (dose d'oxydants ou d'UV, longueur d'onde d'irradiation,...), des caractéristiques des eaux de dilution (pH, pièges à radicaux hydroxyles,...). Les études cinétiques indiquent que l'atrazine est relativement réfractaire à une oxydation par l'ozone moléculaire (constante cinétique de l'ordre de 6 l mol-¹ s-¹ à 20 °C) et est assez réactive vis-à-vis des radicaux hydroxyles (constante cinétique de l'ordre de 2,5 10·9 mol-¹ s-¹ à 20 °C). En ce qui concerne les constantes cinétiques de réaction des radicaux hydroxyles sur les autres s-triazines, les résultats montrent que les méthylthio s-triazines sont beaucoup plus réactives que les méthoxy s-triazines qui sont elles mêmes légèrement plus réactives que les chloro et hydroxy s-triazines. Parmi les sous-produits d'oxydation de l'atrazine, la déséthyldésisopropylatrazine et l'acide cyanurique sont très réfractaires à une oxydation par les radicaux hydroxyles et par l'ozone moléculaire.

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23

Moldovan, Oana, Pedro Lameiras, Eric Henon, Flavia Popa, Agathe Martinez, Dominique Harakat, Carmen Sacalis, Yvan Ramondenc, and Mircea Darabantu. "New serinolic amino-s-triazines by chemoselective amination of cyanuric chloride and their (pro)diastereomerism in restricted rotational phenomena." Open Chemistry 10, no. 4 (August 1, 2012): 1119–36. http://dx.doi.org/10.2478/s11532-012-0015-4.

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AbstractThe highly chemoselective preparation of new elaborated N-unsymmetrically substituted chlorodiamino-s-triazines and melamines, seen as building-blocks for iterative synthesis, is reported. It consisted of amination of cyanuric chloride with commercial C-2-substituted 2-aminopropane-1,3-diols (“serinols”), playing the role as “open-chain” unit and enantiopure (1S,2S)-2-amino-1-(4-nitrophenyl)propane-1,3-diols (“p-nitrophenylserinols”) based amino-1,3-dioxanes (“closed-chain” unit). Issued from the restricted rotation about C(s-triazine)-N(exocyclic) partial double bonds, seen as axes of (pro)diastereomerism, a global four-component rotational equilibrium involving the title compounds is discussed based on DFT computation and (VT) NMR data. Depending on π-deficiency of the s-triazine core, an (un)synchronised deblocking of the generated rotational diastereomers was observed. They are discussed as influence of intra-vs. intermolecular NH...OH (dynamic) interactions occurring in the “open-chain” unit and the anancomeric, axial vs. equatorial, amino-anchorage of the “closed-chain” unit.

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24

Karns, Jeffrey S. "Gene Sequence and Properties of ans-Triazine Ring-Cleavage Enzyme from Pseudomonassp. Strain NRRLB-12227." Applied and Environmental Microbiology 65, no. 8 (August 1, 1999): 3512–17. http://dx.doi.org/10.1128/aem.65.8.3512-3517.1999.

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ABSTRACT Pesticides based on the s-triazine ring structure are widely used in cultivation of food crops. Cleavage of thes-triazine ring is an important step in the mineralization of s-triazine compounds and hence in their complete removal from the environment. Cyanuric acid amidohydrolase cleaves cyanuric acid (2,4,6-trihydroxy-s-triazine), which yields carbon dioxide and biuret; the biuret is subject to further metabolism, which yields CO2 and ammonia. The trzD gene encoding cyanuric acid amidohydrolase was cloned into pMMB277 fromPseudomonas sp. strain NRRLB-12227, a strain that is capable of utilizing s-triazines as nitrogen sources. Hydrolysis of cyanuric acid was detected in crude extracts ofEscherichia coli containing the cloned gene by monitoring the disappearance of cyanuric acid and the appearance of biuret by high-performance liquid chromatography (HPLC). DEAE and hydrophobic interaction HPLC were used to purify cyanuric acid amidohydrolase to homogeneity, and a spectrophotometric assay for the purified enzyme was developed. The purified enzyme had an apparentKm of 0.05 mM for cyanuric acid at pH 8.0. The enzyme did not cleave any other s-triazine or hydroxypyrimidine compound, although barbituric acid (2,4,6-trihydroxypyrimidine) was found to be a strong competitive inhibitor. Neither the nucleotide sequence of trzD nor the amino acid sequence of the gene product exhibited a significant level of similarity to any known gene or protein.

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25

Nguyen, Ha Tran, and Anh Tuan Luu. "Synthesis and characterization of thiacalix[3]triazine and 1,3,5-tris(4- bromophenyl)benzene for chemsensor application." Science and Technology Development Journal - Natural Sciences 1, no. 6 (December 7, 2018): 163–76. http://dx.doi.org/10.32508/stdjns.v1i6.626.

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The synthesis of thiacalix[3]triazines and 1,3,5- tris(4-bromophenyl)benzene have been synthesized via simple steps and was characterized to determine the chemical structure. The structure of Thiacalix[3]triazines was characterized via 1H NMR and 13C NMR that conformed the expected structure of compound. In addition, the thiacalix[3]triazines exhibited the λmax at 560 nm and λonset at 720 nm which corresponding to the bandgap of 1.7 ev. Thiacalix[3]triazines, cyclotrimeric metacyclophanes with direct S linkages between the heteroaryl constituents, were shown to associate with anion that could be useful for chemsensor application.

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26

Lattermann, GÜNter, and Hartwig Höcker. "Tris(Dialkylamino)-s-Triazines, Characterization and Thermal Properties." Molecular Crystals and Liquid Crystals 133, no. 3-4 (March 1986): 245–57. http://dx.doi.org/10.1080/00268948608080816.

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27

Chen, Chen, Raymond Dagnino, and James R. McCarthy. "A Convenient Synthetic Method for Trisubstituted s-Triazines." Journal of Organic Chemistry 60, no. 26 (December 1995): 8428–30. http://dx.doi.org/10.1021/jo00131a023.

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28

Wang, Fang, Hong-chen Du, Jian-ying Zhang, and Xue-dong Gong. "Comparative Theoretical Studies of Energetic Azo s-Triazines." Journal of Physical Chemistry A 115, no. 42 (October 27, 2011): 11852–60. http://dx.doi.org/10.1021/jp206756r.

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29

Omokawa, Hiroyoshi, Nobumasa Ichizen, and Tetsuo Takematsu. "Phytotoxic Properties of α-Substituted Benzylamino-s-triazines." Agricultural and Biological Chemistry 51, no. 9 (September 1987): 2563–68. http://dx.doi.org/10.1080/00021369.1987.10868441.

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30

Azev, Yu A., V. L. Rusinov, I. P. Loginova, A. B. Koshokov, E. L. Pid�mskii, A. F. Goleneva, and G. A. Aleksandrova. "Synthesis and biological activity of cyanomethoxy-s-triazines." Pharmaceutical Chemistry Journal 25, no. 10 (October 1991): 719–23. http://dx.doi.org/10.1007/bf00768985.

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31

Liang, Helong, Ganzhong Li, Lei Zhang, Gefei Wang, Mingyu Song, Heng Li, and Bingxin Yuan. "Scalable Synthetic Strategy for Unsymmetrical Trisubstituted s-Triazines." Organic Letters 23, no. 15 (July 14, 2021): 5821–25. http://dx.doi.org/10.1021/acs.orglett.1c01970.

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32

Jevric, Lidija, Sanja Podunavac-Kuzmanovic, Strahinja Kovacevic, Natasa Kalajdzija, and Bratislav Jovanovic. "Estimation of the retention behaviour of s-triazine derivatives applying multiple regression analysis of selected molecular descriptors." Acta Periodica Technologica, no. 44 (2013): 229–37. http://dx.doi.org/10.2298/apt1344229j.

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The estimation of retention factors by correlation equations with physico-chemical properties can be of great helpl in chromatographic studies. The retention factors were experimentally measured by RP-HPTLC on impregnated silica gel with paraffin oil using two-component solvent systems. The relationships between solute retention and modifier concentration were described by Snyder?s linear equation. A quantitative structure-retention relationship was developed for a series of s-triazine compounds by the multiple linear regression (MLR) analysis. The MLR procedure was used to model the relationships between the molecular descriptors and retention of s-triazine derivatives. The physicochemical molecular descriptors were calculated from the optimized structures. The physico-chemical properties were the lipophilicity (log P), connectivity indices (?), total energy (Et), water solubility (log W), dissociation constant (pKa), molar refractivity (MR), and Gibbs energy (GibbsE) of s-triazines. A high agreement between the experimental and predicted retention parameters was obtained when the dissociation constant and the hydrophilic-lipophilic balance were used as the molecular descriptors. The empirical equations may be successfully used for the prediction of the various chromatographic characteristics of substances, with a similar chemical structure.

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33

ME Shelke. "Synthesis and evaluation of newly1-substituted-(2H)-2-thio-4-(3-substitutedthiocarbamido-1-yl)-6-(2-imino-4-thio-5- substitutedbiureto-1-yl) 1, 2-dihydro-S-triazines as potent antimicrobial agents." GSC Biological and Pharmaceutical Sciences 13, no. 3 (December 30, 2020): 109–12. http://dx.doi.org/10.30574/gscbps.2020.13.3.0245.

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The search for novel antibiotics is of immense importance in research areas around the world for agricultural, pharmaceutical, and industrial applications. The s-triazines are widely used as an important biological tool for the production of a wide range of novel secondary metabolites. In the present study, the series of 1-substituted-(2H)-2-thio-4-(3- substitutedthiocarbamido-1-yl)-6-(2-imino-4-thio- 5- substitutedbiureto-1-yl) 1,2-dihydro-s-triazine [4a(i) to 4f(iii)] have been obtained by the isomerisation of 2-(2-imino-4-thio-5- substitutedbiureto-1-yl)-4-(3- substitutedthio-carbamido-1-yl)-6- substitutedimino-1,3,5-thiadiazine [3a(i) to 3f(iii)] in presence of ethanolic sodium bicarbonate solution. The later were synthesized by the chemical action of 1, 3-bis-(N-phenylamidinothiocarbamido)-thiocarbamide and aryl/alkylisocyanodichlorides. On the basis of IR, PMR spectrum data and elemental analysis, the structures of all these compounds were established. The synthesized s-triazine were analyzed for antimicrobial activities by cup plate diffusion method and exhibited a broad spectrum of antimicrobial activity against test pathogens. The isolate was tested for the ability to grow in the presence of antibiotic, such as ciprofloxacin at the same concentration. Thus, the study concludes with the eco-friendly route for synthesizing s-triazine with antibacterial activity against clinically important pathogens.

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34

Lopez, A., G. Mascolo, G. Tiravanti, M. Santori, and R. Passino. "Oxidation of sulfur-containing s-triazines during groundwater hypochlorination." Water Science and Technology 30, no. 7 (October 1, 1994): 53–59. http://dx.doi.org/10.2166/wst.1994.0304.

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With the aim to identify the reaction by-products, the oxidation of four sulfur-containing s-triazines (prometryne, terbutryne, ametryne and desmetryne) by sodium hypochlorite (NaClO) has been investigated using oxidant and herbicides initial concentrations respectively of 11 ppm and 3 ppm. Furthermore, to study the effect of reagent concentration on the oxidation rate, only for prometryne, the reaction has been carried out at two more oxidant and herbicide initial concentrations (ppm): 3 and 0.003, 0.011 and 0.003. Oxidation reactions were monitored by high performance liquid chromatography (HPLC), while the identification of by-products was at first carried out by HPLC-mass spectrometry (HPLC-MS) and then confirmed by accurate mass measurements. The results indicate that all the investigated triazines react in the same way. In the experimental conditions (T = 20°C, pH = 8, reaction time = 48 h) the reaction gives rise to three identified oxidation by-products: the sulfoxide, the sulfone and the sulfone's hydrolysis product. As expected, the lower the reagent's concentration the slower the oxidation rate. Based on the obtained results, a general pathway for the oxidation of sulfur-containing s-triazines is proposed.

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35

Šoškić, Milan Š., and Aleksandar Sabljić. "Inhibition of Hill Reaction by 2-Azido-s-triazine Derivatives: QSAR Study with Molecular Connectivity Indices." Zeitschrift für Naturforschung C 44, no. 3-4 (April 1, 1989): 255–61. http://dx.doi.org/10.1515/znc-1989-3-414.

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Abstract 2-A zido-s-T riazines, Connectivity Indices. Inhibition of Hill Reaction. Photosystem II, OSAR Modelling This study was undertaken to find a simple and accurate structural parameters for the quantitative description of inhibitory potency of 2-azido-s-triazines in Hill reaction and to gain more information about the mechanism of inhibition on molecular level. A very good correlation (r = 0.946) was obtained between the pl50 values (the negative logarithm of the molar concentration that causes 50% inhibition) and the valence zero-order and the difference between the second-order and the valence second-order molecular connectivity indices. This model, when com pared with the empirical models based on the 1-octano/water partition coefficients and the chromatographic retention data, shows superior performance in accuracy and range of applicability. In addition, the direct correspondence between molecular structure and above connectivity indices makes it possible to locate structural features responsible for the inhibitory potency of 2-azido-s-triazines in Hill reaction. From our OSAR analysis, the interaction between the chloroplast receptor site and 2-azido-s-triazines, which causes inhibition of Hill reaction, is primarily influenced by the size of alkylamino substituents and it accounts for the most variation in the pl50 data. The structural features of secondary importance that control the magnitude of pl50’s are the polarity of alkylamino chains and the degree of branching on alpha carbon atom of R:alkylamino substituent. Com pared with the main factor, the size of alkylamino substituents, they can be viewed as a fine tuning elements for the inhibitory potency of 2-azido-s-triazines.

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36

Muldoon, Mark T., and Judd O. Nelson. "Pesticide Waste Treatment Monitoring of s-Triazines Using Immunoassay." Journal of Agricultural and Food Chemistry 42, no. 8 (August 1994): 1686–92. http://dx.doi.org/10.1021/jf00044a019.

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37

Stephens, Craig L., H. LeRoy Nyquist, and Kenneth I. Hardcastle. "Carbenoid Reactions of 2-Halomethyl-4,6-dimethyl-s-triazines." Journal of Organic Chemistry 67, no. 9 (May 2002): 3051–56. http://dx.doi.org/10.1021/jo0111412.

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38

Srinivas, K., U. Srinivas, K. Bhanuprakash, K. Harakishore, U. S. N. Murthy, and V. Jayathirtha Rao. "Synthesis and antibacterial activity of various substituted s-triazines." European Journal of Medicinal Chemistry 41, no. 11 (November 2006): 1240–46. http://dx.doi.org/10.1016/j.ejmech.2006.05.013.

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39

Gibson, Harry W., Darin L. Dotson, Herve′ Marand, and Timothy M. Swager. "Synthesis and Characterization of Liquid Crystalline Triaryloxy-s-Triazines." Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 326, no. 1 (January 1, 1999): 113–38. http://dx.doi.org/10.1080/10587259908025409.

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40

Pereira, S. V., T. Reis, B. S. Souza, R. F. Dantas, D. A. Azevedo, M. Dezotti, C. Sans, and S. Esplugas. "Oestrogenicity assessment of s-triazines by-products during ozonation." Environmental Technology 36, no. 12 (January 6, 2015): 1538–46. http://dx.doi.org/10.1080/09593330.2014.995235.

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41

López-Muñoz, M. J., J. Aguado, and A. Revilla. "Photocatalytic removal of s-triazines: Evaluation of operational parameters." Catalysis Today 161, no. 1 (March 2011): 153–62. http://dx.doi.org/10.1016/j.cattod.2010.10.076.

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42

Schaller, C., D. Rogez, and A. Braig. "Hydroxyphenyl-s-triazines: advanced multipurpose UV-absorbers for coatings." Journal of Coatings Technology and Research 5, no. 1 (July 11, 2007): 25–31. http://dx.doi.org/10.1007/s11998-007-9025-0.

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43

Mascolo, Giuseppe, Antonio Lopez, Roberto Passino, Giuseppina Ricco, and Giovanni Tiravanti. "Degradation of sulphur containing s-triazines during water chlorination." Water Research 28, no. 12 (December 1994): 2499–506. http://dx.doi.org/10.1016/0043-1354(94)90068-x.

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44

Mackay, Simon P., and Patrick J. O' Malley. "Molecular Modelling of the Interactions between Optically Active Triazine Herbicides and Photosystem II." Zeitschrift für Naturforschung C 48, no. 5-6 (June 1, 1993): 474–81. http://dx.doi.org/10.1515/znc-1993-5-612.

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Abstract The QB binding site of photosystem II in green plants displays stereoselectivity for the (S′) stereoisomer of the α-methylbenzyl derivative of atrazine but not for derivatives with smaller substituents such as sec-butyl. We have shown that interactive models reflect the experimental data by determining the intermolecular energies between the D1 protein binding region (residues Leu 210 to Val 280) and the triazine analogs. The intermolecular energy was calculated by van der Waals and electrostatic interactions after energy minimization of the combined structures to reduce inter and intramolecular strain. On the basis of these assumptions the role of stereoselectivity for optically active triazines was site responsible such stereoselectivity was identified.

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45

Robinson, D. E., J. T. O’Donovan, M. P. Sharma, D. J. Doohan, and R. Figueroa. "The biology of Canadian weeds. 123. Senecio vulgaris L." Canadian Journal of Plant Science 83, no. 3 (July 1, 2003): 629–44. http://dx.doi.org/10.4141/p01-124.

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Senecio vulgaris L. is a native of Eurasia, and has been introduced to and become naturalized in North America, South America, Africa and Australia. In Canada, it is found in all provinces and the Northwest and Yukon Territo ries. High fecundity, rapid wind dispersal, continuous germination under a wide range of growing conditions, rapid growth rate, ability to set seed a number of times per growing season and lack of chemical control options has made this species an importan t weed of some horticultural crops. This species produces pyrrolizidine alkaloids that have been implicated as a cause of liver toxicity in livestock. Populations of S. vulgaris have displayed resistance to Group 5, 6 and 7 herbicides (triazines, uracils, substituted ureas and nitriles) and other photosynthetic-transport-inhibiting herbicides. Triazine resistance in S. vulgaris was the first reported case of herbicide resistance worldwide. A rust pathogen, Puccinia lagenophorae Cooke, is currently being evaluated for control of S. vulgaris in Europe. Key words:

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46

Shapir, Nir, Charlotte Rosendahl, Gilbert Johnson, Marco Andreina, Michael J. Sadowsky, and Lawrence P. Wackett. "Substrate Specificity and Colorimetric Assay for Recombinant TrzN Derived from Arthrobacter aurescens TC1." Applied and Environmental Microbiology 71, no. 5 (May 2005): 2214–20. http://dx.doi.org/10.1128/aem.71.5.2214-2220.2005.

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ABSTRACT The TrzN protein, which is involved in s-triazine herbicide catabolism by Arthrobacter aurescens TC1, was cloned and expressed in Escherichia coli as a His-tagged protein. The recombinant protein was purified via nickel column chromatography. The purified TrzN protein was tested with 31 s-triazine and pyrimidine ring compounds; 22 of the tested compounds were substrates. TrzN showed high activity with sulfur-substituted s-triazines and the highest activity with ametryn sulfoxide. Hydrolysis of ametryn sulfoxide by TrzN, both in vitro and in vivo, yielded a product(s) that reacted with 7-chloro-4-nitrobenz-2-oxa-1,3-diazole (NBD-Cl) to generate a diagnostic blue product. Atrazine chlorohydrolase, AtzA, did not hydrolyze ametryn sulfoxide, and no color was formed by amending those enzyme incubations with NBD-Cl. TrzN and AtzA could also be distinguished by reaction with ametryn. TrzN, but not AtzA, hydrolyzed ametryn to methylmercaptan. Methylmercaptan reacted with NBD-Cl to produce a diagnostic yellow product having an absorption maximum at 420 nm. The yellow color with ametryn was shown to selectively demonstrate the presence of TrzN, but not AtzA or other enzymes, in whole microbial cells. The present study was the first to purify an active TrzN protein in recombinant form and develop a colorimetric test for determining TrzN activity, and it significantly extends the known substrate range for TrzN.

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47

Feizbakhsh, Alireza, and Shokooh Ehteshami. "Modified Magnetic Nanoparticles as a Novel Sorbent for Dispersive Magnetic Solid-Phase Extraction of Triazine Herbicides in Aqueous Media." Journal of AOAC INTERNATIONAL 100, no. 1 (January 1, 2017): 198–205. http://dx.doi.org/10.5740/jaoacint.16-0054.

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Abstract In this study, a polythiophene/chitosan polymer and electrospinning polymer nanofibers as modifiercompounds were used, and magnetic nanocomposites as a novel adsorbent were proposed, for the preconcentration of some triazines, includingatrazine, ametryn, and terbutryn, in aqueous samples before GC.The synthesized magnetic nanoparticles, magnetic polymer nanofibers, and polythiophene magnetic nanocomposite were characterizedby scanning electron microscopy. The separation of the target analytes fromthe aqueous solutioncontaining the triazines and different magnetic nanocomposites were simply achieved by applying an external magnetic field. The extraction efficiency of magnetic polyamide nanofiberswas enhanced as compared with other modified magnetic nanoparticles. The main factors affecting the extraction efficiency, including desorption conditions, nanocomposite component ratio, electrospinningtime, sorbent amount, extraction time, ionic strength, and sample pH, were optimized. The developed method proved to be convenient and offers sufficient sensitivity and good reproducibility.Under optimized conditions, the method's LOD (S/N = 3) and LOQ (S/N = 10) were 1–5 and 15ng L−1, respectively; good linearity was obtained within the range of 15–2000 ng L−1 for triazines, with correlation coefficients >0.9997. The RSDat the concentration level of 100 ng L−1 was 9–14% (n = 3). Furthermore, the method was successfully applied to the determination of triazines in realsamples, in which relative recoveriesof 98–103% were obtained. Compared with other methods, the current method is characterized by its ease, fast separation, and low detection limits.

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Wang, Aizhu, Xiaoming Zhang, and Mingwen Zhao. "Topological insulator states in a honeycomb lattice of s-triazines." Nanoscale 6, no. 19 (2014): 11157–62. http://dx.doi.org/10.1039/c4nr02707h.

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The already-synthesized honeycomb lattice of s-triazines with a chemical formula C₆N₆ has topologically nontrivial electronic states characterized by p_x,y-orbital band structures with a topological invariant of Z₂ = 1.

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49

Martínez-Alvarez, Roberto, Antonio Herrera, Pedro Ramiro, Mourad Chioua, and Rachid Chioua. "A Practical and Easy Synthesis of 2,4,6-Trisubstituted-s-triazines." Synthesis, no. 4 (2004): 503–5. http://dx.doi.org/10.1055/s-2004-815927.

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Hickmott, P. W. "Reactive dyes: Preparation of substituted styrylpyrimidines and styryl-s-triazines." Journal of Applied Chemistry 16, no. 8 (May 4, 2007): 227–29. http://dx.doi.org/10.1002/jctb.5010160803.

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