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 Найдено в других БД:Каталог книг и продолжающихся изданий (1)Труды сотрудников Института химии твердого тела УрО РАН (1)Публикации Чарушина В.Н. (3)
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Общее количество найденных документов : 19
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 1-10    11-19 
1.
Инвентарный номер: нет.
   
   U 62


   
    Unusual ring-chain tautomerism in bicyclo[4.2.0]octane derivatives [Text] / V. Yu. Korotaev, A. Yu. Barkov, P. A. Slepukhin, M. I. Kodess, V. Ya. Sosnovskikh // Tetrahedron Letters. - 2011. - Vol. 52, № 23. - P3029-3032 : рис.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A new type of ring-chain tautomerism, which consists of the reversible conversion of bicyclo[4.2.0]octane derivatives into trisubstituted enamines was found and studied by 1H NMR spectroscopy. The starting materials were prepared by the stereoselective reaction of (E)-3,3,3-trichloro-1-nitropropene with cyclohexanone enamines

\\\\Expert2\\nbo\\Tetrahedron Letters\\2011, v. 52, p. 3029.pdf
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2.
Инвентарный номер: нет.
   
   U 50


   
    Uncatalyzed reactions of alfa-(trihaloethylidene)nitroalkanes with push-pull enamines: a new type of ring-ring tautomerism in cyclobutane derivatives and the dramatic effect of the trihalomethyl group on the reaction pathway [Text] / V. Yu. Korotaev, A. Yu. Barkov, P. A. Slepukhin, M. I. Kodess, V. Ya. Sosnovskikh // Tetrahedron Letters. - 2011. - In Press, Accepted Manuscript, 30 august 2011. - P1-15. - Bibliogr. : p. 10-12 (15 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A new type of ring-ring isomerism, which consists of the reversible transformation of cyclobutane derivatives into substituted 1,2-oxazine N-oxides was found and studied by NMR spectroscopy and X-ray diffraction analysis. The starting materials were prepared by the stereoselective reaction of ?-(trifluoroethylidene)nitroalkanes, which react with ethyl ?-morpholino- and ?-piperidinocrotonates at the more nucleophilic ?-position, whereas the reaction of ?-(trichloroethylidene)nitroalkanes proceeds at the ?-methyl group to give the corresponding linear products

\\\\Expert2\\nbo\\Tetrahedron Letters\\2011, In Press, Acc. Man. 30 aug.pdf
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3.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis, Structure, and Keto-Enol Tautomerism of 3-R1-5,5-R2,R2-6-R3-2,3,5,6-Tetrahydropyran-2,4-diones [Electronic resource] / V. V. Shchepin, M. I. Kodess, Yu. Kh. Sazhneva, N. Yu. Russkikh // Russian Journal of General Chemistry. - 2005. - Vol. 75, № 10. - P1622-1627
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Ethyl esters of 2,4-dibromo-2-R1-4-R2-3-oxopentanoic and -hexanoic acids react with zinc and aliphatic or aromatic aldehydes under the conditions of the Reformatskii reaction to give 3-R1-5,5-R2, R2-6-R3-2,3,5,6-tetrahydropyran-2,4-diones, which are obtained in three forms: keto, enol with enolization of the keto group, and enol with enolization of the ester group. The keto form is isolated by crystallization from a mixture of CCl4 and petroleum ether; the first enol form, from MeOH, EtOH, and polar aprotic solvents; and the second enol form, from CHCl3. The second enol form is oxidized in DMSO to form a keto compound containing a hydroxy group at the 3-position of the heteroring

\\\\Expert2\\nbo\\Russian Journal of General Chemistry\\2005, V. 75, N 10, p.1622.pdf
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4.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of new 5-aza-isosteres of guanine—5-aminosubstituted 1,2,4-triazolo[1,5-a]-1,3,5-triazin-7-ones [Electronic resource] / V. V. Bakharev, V. E. Parfenov, I. V. Ulyankina, A. V. Zavodskskaya, E. V. Selezneva, A. A. Gidaspov, O. S. Eltsov, P. A. Slepukhin // Tetrahedron. - 2014. - Vol. 70, № 38. - С. 6825-6830
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
FUSED-RING SYSTEMS -- REARRANGEMENT -- TAUTOMERISM
Аннотация: The reaction of 4-amino-substituted 6-hydrazinyl-1,3,5-triazin-2(1H)-ones with orthoformate proceeds via the Dimroth-type rearrangement to give 5-amino-substituted 1,2,4-triazolo[1,5-a]-1,3,5-triazine-7-ones. IR, NMR and X-ray studies have shown that the only product of the reaction was the [1,5-a]-isomer as prototropic 3H- and 6H-tautomers.

\\\\expert2\\nbo\\Tetrahedron\\2014, v. 70 (38), p. 6825.pdf
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5.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis and Tautomeric Equilibrium of Polyfluoroacyl-Containing 1,5-Benzodiazepines [Text] / D. S. Yachevskii, D. L. Chizhov, M. I. Kodess, K. I. Pashkevich // Monatshefte fur Chemie . - 2004. - Vol. 135, № 1. - P23-30 : ил. - Библиогр.: с. 30 (8 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
NMR -- TAUTOMERISM -- SYNTHESIS
Аннотация: The reaction of bis(polyfluoroalkyl)-containing 1,3,5-triketones with o-phenylenediamine yielded 2-polyfluoroacylmethylene-4-polyfluoroalkyl-1,3- or 1,5-dihydro-1,5-benzodiazepines. The tautomeric equilibrium of the obtained benzodiazepines in CDCl3, CD3CN, DMSO, and DMF solution was studied.??

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6.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis and structure of 4-hydroxy-4-fluoroalkyl-1,4-dihydroimidazo[5,1-c][1,2,4]triazines [Electronic resource] / E. V. Shchegol'kov, E. V. Sadchikova, Ya. V. Burgart, V. I. Saloutin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2009. - Vol. 45, № 4. - P572-580
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Azo coupling of fluorinated 1,3-diketones with 4-ethoxycarbonyl-1H-imidazole-5-diazonium chloride led to the formation of 4-hydroxy-4-polyfluoroalkyl-1,4-dihydroimidazo[5,1-c][1,2,4]triazines. According to the 1H and 19F NMR data, these compounds in solution give rise to ring-chain tautomerism via opening of the C4-N5 bond, which is especially characteristic of dihydroimidazotriazines with a polyfluoroalkyl substituent longer than trifluoromethyl group

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2009, 45 (4), 572.pdf
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7.
Инвентарный номер: нет.
   
   S 89


   
    Structure of diethyl (polyfluorobenzoyl)malonates and their thermal intramolecular cyclizat / D. N. Bazhin, E. V. Schegolkov, Yu. S. Kudyakova, Ya. V. Burgart, V. I. Saloutin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2011. - Vol.60, №5. - С. 929-932
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
POLYFLUOROBENZOYL -- POLYFLUOROBENZOYL CHLORIDES -- CYCLIZATION
Аннотация: The reaction of the C-ethoxymagnesium derivative of diethyl malonate with polyfluorobenzoyl chlorides affords the corresponding (polyfluorobenzoyl)malonates prone to thermal cyclization into coumarin derivatives. The compounds obtained are inherent in keto—enol tautomerism

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2011, 60 (5), 929-932.pdf
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8.
Инвентарный номер: нет.
   
   S 89


   
    Structure of 5,6,7,8-tetrafluoro-4-hydroxycoumarins [Электронный ресурс] / K. V. Scherbakov, Ya. V. Burgart, M. I. Kodess, V. I. Saloutin // Chemistry of Heterocyclic Compounds. - 2012. - Vol.48, №9. - P1297-1306
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
5,6,7,8-TETRAFLUORO-4-HYDROXYCOUMARIN -- IMINE-ENAMINE TAUTOMERISM -- KETO-ENOL TAUTOMERISM
Аннотация: The structure of 5,6,7,8-tetrafluoro-4-hydroxycoumarin and its 3-substituted derivatives was studied by X-ray structural analysis and IR, 1H, 13C, and 15N NMR spectroscopy. It was established that the nature of the substituent at the position 3 of the coumarin ring has a significant effect on its stru

\\\\Expert2\\NBO\\Chemistry of Heterocyclic Compounds\\2012, v.48, N 9, p.1297-1306.pdf
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9.
Инвентарный номер: нет.
   
   S 78


   
    Spin-spin coupling constants 13C-15N and 1H-15N in the investigation of azido-tetrazole tautomerism in a series of 2-azidopyrimidines [Electronic resource] / I. A. Khalymbadzha, T. S. Sheshukova, S. L. Deev , V. L. Rusinov, O. N. Chupakhin, Z. O. Shenkarev, A. S. Arseniev // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2013. - Vol.62, №2. - С. 521-528. - Bibliogr. : p. 528 (25 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
AZIDO-TETRAZOLE EQUILIBRIUM -- SPIN-SPIN COUPLING -- 2-AZIDOPYRIMIDINES
Аннотация: A new method was developed for the investigation of an azido-tetrazole equilibrium based on using a complex analysis of 13C-15N and 1H-15N spin-spin coupling constants. The use of this approach became possible due to the selective inclusion of 15N isotopes into the structures of 2-azidopyrimidines and their cyclic analogs tetrazolo[1,5-a]pyrimidines

\\\\expert2\\nbo\\Russian Chemical Bulletin\\2013, 62 (2), 521-528.pdf
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10.
Инвентарный номер: нет.
   
   S 69


   
    S-N(H)-Reactions of triazolo[4,3-b]- and tetrazolo[1,5-b]-1,2,4-triazines with methylene-active carbonyl compounds [Electronic resource] / G. L. Rusinov, N. A. Itsikson, D. G. Beresnev, M. I. Kodess, O. N. Chupakhin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2001. - Vol. 50, № 11. - P2183-2187
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Unsubstituted triazolo[4,3-b]- and tetrazolo[1,5-b]-1,2,4-triazines react with carbanions generated from dimedone and barbituric acid to give adducts of a C-nucleophile with the heterocyclic system through the C=N double bond. The adducts can be oxidized under mild conditions into products of nucleophilic hydrogen substitution. Analogous adducts with carbanions produced in the reactions of ethyl cyanoacetate and ethyl malonate with ButOK proved to be unstable; in this case, the title azolotriazines immediately yield products of nucleophilic hydrogen substitution in position 7. Tautomerism of the S N H products obtained is discussed.

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2001, 50 (11), 2183.pdf
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