Relevant bibliographies by topics / Mono Halogen Derivatives

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Academic literature on the topic 'Mono Halogen Derivatives'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "Mono Halogen Derivatives"

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Kaválek, Jaromír, Lubomír Kacetl, and Marcela Kaválková. "Kinetics of methanolysis of 1-(2-halogeno and 2,6-dihalogenobenzoyl)-3-(4-chlorophenyl)ureas." Collection of Czechoslovak Chemical Communications 54, no. 5 (1989): 1363–69. http://dx.doi.org/10.1135/cccc19891363.

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The methanolysis kinetics has been measured of 1-(2,6-difluorobenzoyl)-3-(4-chlorophenyl)urea (a larvicidal insecticide Dimilin) and of four other mono- and dihalogenobenzoyl derivatives. Polar and steric effects of halogen on the rate and dissociation constants is discussed.
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2

Veverka, Miroslav, and Eva Kraľovičová. "Synthesis of some biologically active derivatives of 2-hydroxymethyl-5-hydroxy-4H-pyran-4-one." Collection of Czechoslovak Chemical Communications 55, no. 3 (1990): 833–40. http://dx.doi.org/10.1135/cccc19900833.

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Depending on reaction conditions, acylation of the phenolic and primary alcoholic group in 2-hydroxymethyl-5-hydroxy-4H-pyran-4-one leads to mono- or disubstituted products. Also described is acylation of the phenolic group in 2-chloromethyl- or 2-bromomethyl-5-hydroxy-4H-pyran-4-one as well as the nucleophilic replacement of the halogen by azide group. The prepared derivatives exhibit herbicidal and growth regulatory activity.
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Povidaichyk, M., О. Onysko, and M. Onysko. "SYNTHESIS OF TERMINAL 2-ALKENYL(ALKYNYL)THIO-5-CYANO-6-(p-DIMETHYLAMINOPHENYL)PYRIMIDIN-4-ONES." Scientific Bulletin of the Uzhhorod University. Series «Chemistry» 48, no. 2 (2023): 79–83. http://dx.doi.org/10.24144/2414-0260.2022.2.79-83.

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Functionalized pyrimidines possess a wide spectrum of biological activity. In particular, they have antitumor, antiviral, and anticonvulsant activities, exhibit anti-inflammatory and analgesic effects, and they are inhibitors of aldose reductase, SecA ATPase, azide, and plant growth. The search for methods of synthesis of new functionalized and condensed pyrimidine derivatives is an urgent problem.
 Alkenyl-functionalized mono- and polycyclic pyrimidines are promise substrates for studying the regioselectivity of electroph ilic heterocyclization reactions under the influence of halogen-co
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4

McGuigan, C., S. Turner, S. R. Nicholls, T. J. O'Connor, and D. Kinchington. "Haloalkyl Phosphate Derivatives of AZT as Inhibitors of HIV: Studies in the Phosphate Region." Antiviral Chemistry and Chemotherapy 5, no. 3 (1994): 162–68. http://dx.doi.org/10.1177/095632029400500304.

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Novel haloalkyl phosphate derivatives of the anti-HIV nucleoside analogue AZT were prepared by phosphorochloridate chemistry. These materials were designed to act as labile membrane-soluble prodrugs of the bio-active free nucleotides. In vitro evaluation revealed the compounds to have a pronounced and selective antiviral action, which varied greatly with the structure of the phosphate moiety. By comparison to simple dialkyl phosphates, which are inactive against HIV-1, the introduction of halogen atoms into the alkyl (phosphate) chains led to anti-HIV activity. Although halogen substitution in
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Kulhánek, Jiří, Oldřich Pytela, and Antonín Lyčka. "Chemometrical Analysis of Substituent Effects. XIII. Comparison of Substituent Effects on Dissociation and Chemical Shift in 13C NMR Spectra of Mono- and Disubstituted Benzoic Acids." Collection of Czechoslovak Chemical Communications 65, no. 1 (2000): 106–16. http://dx.doi.org/10.1135/cccc20000106.

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The 13C chemical shifts have been measured of the carboxyl carbon atoms for all the 2-, 3-, and 4-substituted benzoic acids with H, CH3, CH3O, F, Cl, Br, I, and NO2 substituents, as well as for all 3,4-, 3,5-, and 2,6-disubstituted benzoic acids with combinations of CH3, CH3O, Cl (or Br), NO2 substituents and for symmetrically 2,6-disubstituted derivatives with Et, EtO, PrO, i-PrO, and BuO substituents. The chemical shifts of carboxylic group carbon atoms of the 3- and 4-substituted derivatives show correlation only with the substituent constants σI. For the 2-substituted derivatives was found
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Neubauer, Pia R., Olga Blifernez-Klassen, Lara Pfaff, Mohamed Ismail, Olaf Kruse, and Norbert Sewald. "Two Novel, Flavin-Dependent Halogenases from the Bacterial Consortia of Botryococcus braunii Catalyze Mono- and Dibromination." Catalysts 11, no. 4 (2021): 485. http://dx.doi.org/10.3390/catal11040485.

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Halogen substituents often lead to a profound effect on the biological activity of organic compounds. Flavin-dependent halogenases offer the possibility of regioselective halogenation at non-activated carbon atoms, while employing only halide salts and molecular oxygen. However, low enzyme activity, instability, and narrow substrate scope compromise the use of enzymatic halogenation as an economical and environmentally friendly process. To overcome these drawbacks, it is of tremendous interest to identify novel halogenases with high enzymatic activity and novel substrate scopes. Previously, Ne
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7

Holub, Josef, Mario Bakardjiev, and Bohumil Štíbr. "Some Halogenation Reactions of nido-7,8,9,11-P2C2B7H9." Collection of Czechoslovak Chemical Communications 67, no. 6 (2002): 783–90. http://dx.doi.org/10.1135/cccc20020783.

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Halogenations of the diphosphadicarbaborane nido-7,8,9,11-P2C2B7H9 using the AlCl3/CCl4, and I2/AlCl3/C6H6 halogenation systems resulted in the formation of a mixture of mono- and disubstituted derivatives 10-X-nido-7,8,9,11-P2C2B7H8 (for X = Cl and I, yields 6 and 21%, respectively) and 5,10-X2-nido-7,8,9,11-P2C2B7H7 (for X = Cl and I, yields 57 and 46%, respectively). These results show that the halogenation under electrophilic conditions takes place at positions most distant from the P atoms, but at sites adjacent to the CH units. In contrast, the bromination with N-bromosuccinimide in CH2C
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8

Abrams, Barny. "Mono-Chlorinated 3-Carboxy-7-Hydroxycoumarin: A Highly Fluorescent and Water-Soluble Violet Excitable Dye for Cell Analysis." Blood 112, no. 11 (2008): 4929. http://dx.doi.org/10.1182/blood.v112.11.4929.4929.

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Abstract In our search for new violet excitable dyes with improved photochemical properties, we examined several halogen substituted 7-hydroxycoumarins and found that chlorinated derivatives could be as bright as their fluorinated analogs. In particular, mono-chlorinated 3-carboxy-7-hydroxycoumarin (V450) has a quantum yield equal to 3-carboxy-6,8- difluoro-7-hydroxycoumarin (Pacific Blue™). Antibodies specific to various cell surface markers (CD3, CD4, CD45) were labeled with V450 and tested in single color flow cytometry assays. Our results show that conjugates of V450 are brighter than the
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9

Welchinska, Elena. "ANTI-TUMOR ACTIVITY OF BACTERIAL LECTIN AND 5-METHYLURACIL ADDUCT." CBU International Conference Proceedings 2 (July 1, 2014): 307–12. http://dx.doi.org/10.12955/cbup.v2.476.

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The synthesis was performed using 5-methyluracil mono-and bis-derivatives with the halogen-containing pharmacophore groups in the composition of molecules; their physiochemical and biological properties were studied. These reactions are a typical example of substitution reactions on heteroatom N(1) of uracil molecule using as the second component the reaction of halothane—the known inhaled anesthetic. The reactions were carried out in a solvent system: benzene-dimethyl formamide and diethyl ether, under conditions of phase transfer catalysis DB-18-crown-6-complex (alkaline medium), by heating
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Bray, Brian L., Petr Hess, Joseph M. Muchowski, and Markus E. Scheller. "Lithiated Azafulvenes by Halogen/Metal Interchange of Brominated 6-(Diisopropylamino)-1-azafulvene Derivatives. Novel synthesis of 5-mono- and 4,5-disubstituted 1H-pyrrole-2-carbaldehydes." Helvetica Chimica Acta 71, no. 8 (1988): 2053–57. http://dx.doi.org/10.1002/hlca.19880710823.

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Dissertations / Theses on the topic "Mono Halogen Derivatives"

1

Lin, Guan-Lin, and 林冠霖. "Investigation of Molecular Packing via Inducing mono Ester Functional or Halogen Group onto Hexakis(phenylethynyl)benzene Derivatives." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/jdw2pg.

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碩士<br>淡江大學<br>化學學系碩士班<br>102<br>Introduced ester functional and halogen groups into hexakis(phenylethynyl)benzene derivatives had been investigated in recently year. The ester and halogen groups effect two molecular π-π stacking into the higher order. According this result, in this thesis introduced the mono ester functional and halogen group into hexakis(phenylethynyl)benzene derivatives. The side chain of hexakis(phenylethynyl)benzene derivatives changed the long one into the short one. Then get the single crystal to analysed between two or more molecular π-π stacking. Expect the result can
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Books on the topic "Mono Halogen Derivatives"

1

Kreutz, Martin. Halogen-Metall-Austausch bei Bromnaphthalinen: Synthese, Struktur, und Reaktionsweisen mono- und polylithiierter Naphthaline. A.S. Intemann, 1991.

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