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 Найдено в других БД:Каталог книг и продолжающихся изданий (2)Труды Института высокотемпературной электрохимии УрО РАН (1)Труды сотрудников Института органического синтеза УрО РАН (20)Труды сотрудников Института теплофизики УрО РАН (8)Труды сотрудников Института химии твердого тела УрО РАН (1)
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Общее количество найденных документов : 7
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1.
Инвентарный номер: нет.
   
   R 30


   
    Reactions of azinium cations. 8. Electron structures of 3-substituted 1,2,4-triazines and protonation, quaternization, and reactions with nucleophiles [Electronic resource] / S. G. Alekseev, P. A. Torgashev, M. A. Fedotov, A. I. Rezvukhin, S. V. Shorshnev, A. V. Belik, V. N. Charushin, O. N. Chupakhin // Chemistry of Heterocyclic Compounds. - 1988. - Vol. 24, № 4. - С. 434-441. - Bibliogr. : p. 440-441 (34 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
1,2,4-TRIAZINES -- NUCLEOPHILES
Аннотация: The electron structures of 3-substituted 1,2,4-triazines and isomeric N-methyltriazinium salts were calculated by the CNDO/2 method. The results of the calculations were compared with the parameters of the 13C, 15N, and 14N NMR spectra, as well as with experimental data on the protonation, N-alkylation, and reactions of 1,2,4-triazines with simple nucleophiles. The protonation centers of 1,2,4-triazines were determined by means of 1H, 13C, and 14N NMR spectroscopy. The covalent adducts formed by the proton salts of 3-methoxy-, 3-methylthio-, 3-morpholino-, and 3-pyrrolidino-1,2,4-triazine with water and methanol were recorded by 1H NMR spectroscopy.

\\\\expert2\\nbo\\Chemistry of Heterocyclic Compounds\\1988, v.24, N 4, p. 434.pdf
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2.
Инвентарный номер: нет.
   
   E 27


   
    Efficient and scalable synthesis of 3-(polyfluoroacyl)pyruvaldehydes dimethyl acetals: A novel functionalized fluorinated building-block / D. L. Chizhov, D. V. Belyaev, D. S. Yachevskii, Danil S., G. L. Rusinov, O. N. Chupakhin, V. N. Charushin // Journal of Fluorine Chemistry. - 2017. - Vol. 199. - P39-45
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
FLUORINATED 1,3-DIKETONES -- ACETALS -- CLAISEN CONDENSATION -- CALCIUM HYDRIDE -- 3-(POLYFLUORACYL)PYRUVALDEHYDES -- PYRAZOLE-1h-3- CARBALDEHYDES
Аннотация: An efficient approach for the synthesis of 3-(polyfluoroacyl)pyruvaldehydes dimethyl acetals (1,1-dimethoxy-4-polyfluoroalkyl-butan-2,4-dions) from 1,1-dimethoxyacetone and polyfluorinated carboxylic acid esters has been developed. The procedure includes the Claisen type condensation of the starting materials by means of calcium hydride in methanol, followed by isolation of copper complexes of the corresponding diketones and their destroying with disodium EDTA. A simple synthesis of 5(3)-(polyfluoroalkyl)-1H-pyrazole-3(5)-carbaldehydes and their acetals is also presented.

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3.
Инвентарный номер: нет.
   


   
    A BF3-mediated C–H/C–Li coupling of 1,3,7-triazapyrene with 2-thienyllithium in the design of push–pull fluorophores and chemosensors for nitroaromatics / I. A. Lavrinchenko, T. D. Moseev, M. V. Varaksin [et al.] // New Journal of Chemistry. - 2022. - Vol. 46, № 11. - P5121-5128
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Mono- and bis-2-thienyl-substituted 1,3,7-triazapyrenes have been synthesized for the first time via BF3-mediated C–H/C–Li coupling of 1,3,7-triazapyrene with 2-thienyllithium in 33 and 51% yields, respectively. The photophysical properties of these polycyclic azaaromatics have been studied, with emission in the range of 450–500 nm and fluorescence quantum yields of up to 99% in methanol solutions being revealed. The turn-off chemosensing properties of 2-thienyl-substituted 1,3,7-triazapyrenes for the selective detection of nitroaromatics have also been assessed; in particular, the quenching constants according to the Stern–Volmer model, the quenching sphere radius according to the Perrin model, the detection limit and the quenching efficiency have been determined. In particular, 6,8-bis-(thiopen-2-yl)-1,3,7-triazapyrene, characterized by 10 times the quenching constant and limit of detection (LOD) compared to the mono-substituted analog, can be considered as the most promising chemosensor for determining nitroaromatic compounds. DFT calculations confirm the presence of intramolecular charge transfer (ICT) effects in the case of the obtained fluorophores and clarify the quenching mechanism for nitroaromatics.

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4.
Инвентарный номер: нет.
   
   R 30


   
    Reaction of azinium cations. 5. Addition of water and methanol to 1,4-diazinium cations in the presence of bases. equilibrium constants and PMR spectra of the mono- and diadducts [Electronic resource] / V. N. Charushin, I. V. Kazantseva, M. G. Ponizovskii, L. G. Egorova, E. O. Sidorov, O. N. Chupakhin // Chemistry of Heterocyclic Compounds. - 1986. - Vol. 25, № 10. - С. 1118-1125. - Bibliogr. : p. 1125 (23 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
HYDROXIDE IONS -- 1,4-DIAZINIUM IONS -- METHOXYL ADDUCTS
Аннотация: The PKR+ values and equilibrium constants for the addition of hydroxide ions to 1,4-diazinium ions were determined by spectrophotometry. The ratios 1∶1 and 1∶2 of the methoxyl adducts of the 1,4-diazinium ions in the sodium methoxide-methanol-D4 system and the equilibrium constants for the transformations of the mono-adducts into the diaddition products were determined by PMR spectroscopy

\\\\expert2\\nbo\\Chemistry of Heterocyclic Compounds\\1986, v.22, N 10, p. 1118.pdf
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5.
Инвентарный номер: нет.
   
   U 62


   
    Unusual dimerization of 1-ethyl-1,2,4-triazinium salts into 4a,4b,9,10-tetrahydro-1,3,6,8,8a,10a-hexaazaphenanthrenes [Electronic resource] / O. N. Chupakhin, B. V. Rudakov, S. G. Alexeev, V. N. Charushin, V. A. Chertkov // Tetrahedron Letters. - 1990. - Vol. 31, N 52. - P7665-7668. - Bibliogr. : p. 7668 (14 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 1-Ethyl-3-alkylthio-5-phenyl-1,2,4-triazinium tetrafluoroborates were found to undergo an unusual dimerization on treatment with triethylamine in methanol or ethanol solution. A mechanism for the formation of 4a,4b,9,10-tetrahydro-1,3,5,8,8a,10a-hexaaza-phenanthrenes is proposed

\\\\expert2\\nbo\\Tetrahedron Letters\\1990, v 31, p.7665.pdf
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6.
Инвентарный номер: нет.
   
   B 74


    Boltacheva, N. S.
    Fluoroalkyl-Containing Lithium 1,3-Diketonates in Reactions with Amines and Ammonium Salts [Electronic resource] / N. S. Boltacheva, T. I. Filyakova, V. N. Charushin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2005. - Vol. 41, № 10. - P1452-1457
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Reactions of fluoroalkyl-containing lithium 1,3-diketonates with amines or ammonium salts in glacial acetic acid or methanol at 20°C provide an efficient synthetic route to fluoroalkyl-containing ?-amino-vinyl ketones. Depending on the conditions, reactions of lithium diketonates with 1-aminonaphthalene lead to formation of both ?-aminovinyl ketones and cyclocondensation products, benzo[h]quinolines. The latter can be obtained in one step without isolation of ?-aminovinyl ketones

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2005, 41 (10), 1452.pdf
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7.
Инвентарный номер: нет.
   
   P 34


    Pavlov, A. M.
    Synthesis of beta-Fluoroalkyl-beta,beta-dimethoxy Ketones and beta-Fluoroalkyl-Beta-methoxy-beta,beta-enones [Electronic resource] / A. M. Pavlov, D. L. Chizhov, V. N. Charushin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2005. - Vol. 41, № 10. - P1449-1451
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: alfa-Bromo-beta-fluoroalkyl-alfa,beta-enones react with sodium methoxide in methanol to give the corresponding beta-fluoroalkyl-beta,beta-dimethoxy ketones which eliminate methanol molecule to produce a mixture of E/Z-isomeric beta-fluoroalkyl-?-methoxyvinyl ketones, the Z isomer prevailing

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2005, 41 (10), 1449.pdf
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