Центральная Научная Библиотека УрО РАН

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   Y 12

    Yachevskii, D. S.
    Synthesis of regioisomeric polyfluoroalkylpyrazolo[1,5-a]pyrimidines [Electronic resource] / D. S. Yachevskii, D. L. Chizhov, V. N. Charushin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2006. - Vol. 42, № 1. - P142-144. - Библиогр. : с. 144 (3 назв.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The article discusses a study that illustrates the synthesis of regioisometric polyfluoroalkylpyrazolo[1,5-a]pyramidines in 2 schemes. Polyfluoroalkyl-containing 1,3,5-triketones are convenient and promising reagents for building up various heterocyclic systems. Reactions of triketones as well as their dehydration products are examined.

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2006, 42 (1), 142.pdf
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   S 98


    Synthesis of 2,6-bis-polyfluoroalkyl-4H-pyran-4-ones [Text] / D. S. Yachevskii, D. L. Chizhov, K. I. Pashkevich, V. N. Charushin // ARKIVOC. - 2004. - № 11. - P71-76. - Библиогр. : с. 75 (9 назв.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A convenient synthesis is described of 2,6-bis-polyfluoroalkyl-4H-pyran-4-ones having symmetrical and asymmetrical structures, by dehydration of bis-polyfluoroalkyl- containing 1,3,5-triketones.

\\\\expert2\\nbo\\ARKIVOC\\2004, p.71-76.pdf
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   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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   R 30


    Reactivity of polyfluoroalkyl-containing lithium 1,3-diketonates: activation by nitrosation / V. I. Filyakova, N. S. Boltachova, N. V. Palysaeva, P. A. Slepukhin, T. I. Filyakova, V. N. Charushin, A. B. Sheremetev // Успехи синтеза и комплексообразования = Advances in synthesis and complexing: Сборник тезисов четвертой Международной научной конференции. - Москва : РУДН, 2017. - Ч. 1 : Секция «Органическая химия». - С. 63

ББК 24
Рубрики: ХИМИЧЕСКИЕ НАУКИ

\\\\Expert2\\NBO\\статьи из сборников\\Успехи синтеза и комплексообразования 2017 Ч. 1 С. 63.pdf
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    Step by step and one-pot syntheses of 5-hydroxy-5-(polyfluoroalkyl)isoxazol-4(5h)-one oximes / N. V. Palysaeva, A. B. Sheremetev, N. S. Boltacheva, P. A. Slepukhin, M. G. Pervova, V. I. Filyakova, V. N. Charushin // Mendeleev Communications. - 2018. - Vol. 28, № 1. - P126-127
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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    Synthesis of 3-(polyfluoroalkyl)pyrazol-4-amines on the basis of lithium 1,3-diketonates / N. S. Boltacheva, V. I. Filyakova, V. N. Charushin // Actual problems of organic chemistry and biotechnology. - Екатеринбург, 2020. - P268-269
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
LITHIUM 3-POLYFLUOROALKYL-1,3-DIKETONATES -- HYDRAZINE HYDRATE -- 3-(POLYFLUOROALKYL)-4-AMINOPYRAZOLES

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    Oximes of fluoroalkyl-containing 1,3-diketones: specific features of synthesis, analysis, and thermal stability / N. S. Boltacheva, P. A. Slepukhin, M. G. Pervova [et al.] // Russian chemical bulletin. - 2022. - Vol. 71, № 7. - P1464-1473
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Nitrosation of lithium 1,3-diketonates bearing fluoroalkyl and aryl (or hetaryl) substituents in positions 1 and 3 results in 3-polyfluoroalkyl-1,2,3-propanetrione 2-oximes (from this point on, oximes). Under similar conditions, lithium (Z)-1,1,1-trifluoro-4-oxo-4-(thien-2-yl)-2-buten-2-olate forms a hydration product of the corresponding oxime. Nitrosation of fluoroalkyl-containing lithium 1,3-diketonates is accompanied by retro-decomposition of the initial lithium 1,3-diketonates and the target oximes (or their hydration products) followed by oxidation and hydrolysis of the reaction products. Under the GC-MS conditions, the oximes undergo partial thermal decomposition to 2-aryl(hetaryl)-2-oxoethanenitriles. An analysis of solutions of the oximes in DMSO-d6 by 1H and 19F NMR spectroscopies revealed isomerization and hydration of these compounds. The temperature ranges of stability of the oximes were determined by thermogravimetric analysis and differential thermal analysis. The molecular and crystal structures of 4,4-difluoro-1-(4-methoxyphenyl)-1,2,3-butanetrione 2-oxime and 4,4,4-trifluoro-1-(thien-2-yl)-1,2,3-butanetrione 2-oxime were determined by X-ray diffraction.

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    Oximes of fluoroalkyl-containing 1,3-diketones: specific features of synthesis, analysis, and thermal stability / N. S. Boltacheva, P. A. Slepukhin, M. G. Pervova [et al.] // Russian chemical bulletin. - 2022. - Vol. 71, № 4. - P1464-1473
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Nitrosation of lithium 1,3-diketonates bearing fluoroalkyl and aryl (or hetaryl) substituents in positions 1 and 3 results in 3-polyfluoroalkyl-1,2,3-propanetrione 2-oximes (from this point on, oximes). Under similar conditions, lithium (Z)-1,1,1-trifluoro-4-oxo-4-(thien-2-yl)-2-buten-2-olate forms a hydration product of the corresponding oxime. Nitrosation of fluoroalkyl-containing lithium 1,3-diketonates is accompanied by retro-decomposition of the initial lithium 1,3-diketonates and the target oximes (or their hydration products) followed by oxidation and hydrolysis of the reaction products. Under the GC-MS conditions, the oximes undergo partial thermal decomposition to 2-aryl(hetaryl)-2-oxoethanenitriles. An analysis of solutions of the oximes in DMSO-d6 by 1H and 19F NMR spectroscopies revealed isomerization and hydration of these compounds. The temperature ranges of stability of the oximes were determined by thermogravimetric analysis and differential thermal analysis. The molecular and crystal structures of 4,4-difluoro-1-(4-methoxyphenyl)-1,2,3-butanetrione 2-oxime and 4,4,4-trifluoro-1-(thien-2-yl)-1,2,3-butanetrione 2-oxime were determined by X-ray diffraction.

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