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Browsing by Author "Vafina R."

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Facial selectivity in the reaction of dihalocarbenes with 2-substituted 4,7-dihydro-1,3-dioxepines

Fedorenko V.; Baryshnikov R.; Vafina R.; Shtyrlin Y.; Klimovitskii E. (2007)
Kazan imperial university - Socio-pedagogical space of legal education formation in the Kazan province of the early 19th century

Usmanov T.; Bagmanova N.; Vafina R. (2017)

© Serials Publications. Relevance of the research problem is determined to the necessity of studying the historical experience of legal education formation in Russia and the specific experience of provinces as parts of ...
Kinetics of Conformer Reactions. I. A New Approach

Klimovitskii E.; Shtyrlin Y.; Kashaeva E.; Kiselev V.; Vafina R.; Khotinen A. (1996)

A new approach to determination of partial rate constants for reactions of conformers is developed on the basis of constituents of the Gibbs energy of activation for reactions of a series of conformationally heterogeneous ...
Stereochemistry of hexachlorocyclopentadiene [4+2]-cycloaddition to 2-substituted 4,7-dihydro-1,3-dioxepins

Pavelyev R.; Vafina R.; Lodochnikova O.; Galiullina A.; Romanova E.; Balakin K.; Shtyrlin Y. (2016)

© 2016 Elsevier LtdExperimental investigation of hexachlorocyclopentadiene [4+2]-cycloaddition to 2-substituted 4,7-dihydro-1,3-dioxepins revealed an atypical stereochemical effect. Clear experimental evidence was obtained ...
Stereochemistry of seven-membered heterocycles: XLIII. Steric structure of diastereoisomeric 8,8-dichloro(dibromo)-4-R-3,5-dioxabicyclo[5.1.0]octanes

Baryshnikov R.; Vafina R.; Fedorenko V.; Shtyrlin Y.; Klimovitskii E. (2003)

Dichloro- and dibromocyclopropanation of 2-substituted 1,3-dioxacyclohept- 5-enes according to Makosza resulted in formation of the corresponding 4-substituted 8,8-dichloro(dibromo)-3,5-dioxabicyclo-[5.1.0]octanes in good ...
Stereochemistry of seven-membered heterocycles: XLIV. Spatial structure of 4-R-3,5-dioxabicyclo[5.1.0]octanes

Fedorenko V.; Baryshnikov R.; Khairutdinov B.; Vafina R.; Shtyrlin Y.; Klochkov V.; Klimovitskii E. (2005)

4-R-3,5-Dioxabicyclo[5.1.0]octanes were prepared in good yields by reduction of the corresponding 8,8-dichloro derivatives in a system Li-t-BuOH. According to the data of dynamic 1H and 13CNMR spectroscopy involving ...
Stereochemistry of seven-membered heterocycles: XLV. Highly diastereoselective addition of dimethyl 1,2,4,5-tetrazine-3,6-dicarboxylate to 2-substituted 1,3-dithiacyclohept-5-enes

Vafina R.; Gubaidullin A.; Kataeva O.; Litvinov I.; Shtyrlin Y.; Klimovitskii E. (2006)

Conformationally heterogeneous 2-substituted 1,3-dithiacyclohept-5-enes (R = Ph, Me, t-Bu), which exist in solution as chair and boat conformers, react with dimethyl 1,2,4,5-tetrazine-3,6-dicarboxylate with high exo- ...
Stereochemistry of seven-membered heterocycles: XLVI. Synthesis and dynamic 13C NMR spectroscopy of spiro[cyclohexane-1,4′-[3,5] dioxabicyclo[5.1.0]octanes]. DFT calculations of structurally related formaldehyde and acetone acetals

Gavrilov V.; Shamsutdinov M.; Chmutova G.; Vafina R.; Shtyrlin Y.; Klochkov V.; Klimovitskii E. (2007)

Spiro[cyclohexane-1,4′-[3,5]dioxabicyclo[5.1.0]octanes] were synthesized, and their conformational behavior was studied by dynamic 13C NMR spectroscopy. Anancomeric displacement of conformational equilibrium toward two ...
Stereochemistry of seven-membered heterocycles: XLVII. Synthesis, NMR, XRD, and theoretical investigation of monosulfoxides of (Z)-4,7-dihydro- 1λ4,3-dithiepine series

Galyautdinova A.; Vafina R.; Kataeva O.; Lodochnikova O.; Gnevashev S.; Gnezdilov O.; Gavrilov V.; Shtyrlin Y.; Chmutova G.; Klimovitskii E. (2010)

By oxidation of (Z)-4,7-dihydro-1,3-dithiepines with meta-chloroperbenzoic acid the corresponding 4,7-dihydro-1λ4,3-dithiepine 1-oxides were synthesized in ∼85% yield. A complete assignment of signals in the 1H and 13C NMR ...
Synthesis and antimycotic properties of hydroxy sulfides derived from exo- and endo-4-phenyl-3,5,8-trioxabicyclo[5.1.0]octanes

Pavelyev R.; Gnevashev S.; Vafina R.; Gnezdilov O.; Dobrynin A.; Lisovskaya S.; Nikitina L.; Klimovitskii E. (2012)

Both exo- and endo-isomers of 4-phenyl-3,5,8-trioxabicyclo[5.1.0]octane were reacted with thiophenol to afford individual diastereomers of hydroxy sulfides which were further processed in search for new antimycotic substances. ...
Synthesis and biological activity of quaternary phosphonium salts based on 3-hydroxypyridine and 4-deoxypyridoxine

Shtyrlin N.; Vafina R.; Pugachev M.; Khaziev R.; Nikitina E.; Zeldi M.; Iksanova A.; Shtyrlin Y. (2016)

© 2016, Springer Science+Business Media New York.Methods for the synthesis of quaternary phosphonium salts based on 3-hydroxypyridine and 4-deoxypyridoxine were developed. Some of obtained compounds possess high antibacterial ...
Synthesis and stereochemistry of 4-tert-butyl-4-oxo-3,5,8-trioxa (3,5-dioxa-8-thia)-4-phosphabicyclo [5.1.0]octanes and related acetals

Gavrilov V.; Dobrynin A.; Vafina R.; Klimovitskii A.; Fedorenko V.; Kataeva O.; Berdnikov E.; Litvinov I.; Shtyrlin Y.; Fröhlich R.; Klimovitskii E. (2007)

X-ray, 1H NMR and IR spectroscopy methods have been applied to a series of heterobicyclo[5.1.0]octanes. Endo epoxide and exo thiirane based on 2-tert-butyl-2-oxo-1,3,2-dioxaphosphepine exhibit chair form in a crystal state. ...
Two isomeric fourteen-membered bis-dithioacetals derived from (Z)- and (E)-but-2-ene-1,4-dithiols

Klimovitskii E.; Galyautdinova A.; Dobrynin A.; Gavrilov V.; Gnevashev S.; Vafina R.; Litvinov I.; Shtyrlin Y. (2009)

(Z)-But-2-ene-1,4-dithiol was found to undergo isomerization into the E isomer. Condensation of (Z)- and (E)-but-2-ene-1,4-dithiols with acetaldehyde gave isomeric fourteen-membered bis-dithioacetals whose structure was ...

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