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  1. No Access

    Article

    Preparation of quaternary ammonium salts with a perhydroimidazo[1,5-c]oxazolium molecular skeleton

    A. G. Korepin, P. V. Galkin, N. M. Glushakova, V. S. Malygina… in Russian Chemical Bulletin (2010)

  2. No Access

    Article

    N-substituted tetrahydro-1,3-oxazines and -oxazolidines. 2. Nitration of N-(ω-acylamino-β,β-dinitroalkyl)tetrahydro-1,3-oxazines and -oxazolidines

    Nitration of N-(ω-acylamino0-β,β-dinitroalkyl)tetrahydro-1,3-oxazines and N-(ω-acylamino-β,β-dinitroalkyl)oxazolidines resulted in O-nitrates bearing amide, dinitromethylene, and nitroamine groups. It was found t...

    A. G. Korepin, P. V. Galkin, E. K. Perepelkina… in Russian Chemical Bulletin (2009)

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    Article

    New N-nitrosoamines. 2. Transformations of tetrahydro-1,3-oxazines into nitrates of N-nitrosoamino alcohols

    The reactions of HNO3 with tetrahydro-1,3-oxazines 1a—c produced by aminomethylation of diketopiperazine, isatin, and succinimide, respectively, afforded nitrates of amino alcohols [RCH2NH2(CH2)3ONO2]+NO3 – (4a—c

    A. G. Korepin, P. V. Galkin, E. K. Perepelkina… in Russian Chemical Bulletin (2003)

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    Article

    Transformations of nitrates (nitro esters) of amino alcohols involving both functions. 1. Reaction with alkali metal hydrogen carbonates

    The reaction of nitrates (nitro esters) of amino alcohols with alkali metal hydrogen carbonates yielding oxazolidin-2-ones and tetrahydro-1,3-oxazin-2-ones was discovered. A large number of both known and newl...

    A. G. Korepin, P. V. Galkin, N. M. Glushakova… in Russian Chemical Bulletin (2003)

  5. No Access

    Article

    New N-nitrosoamines. 1. Synthesis and nitrosative cleavage of the Mannich bases derived from nitrogen-containing heterocycles and primary aliphatic amines

    The reactions of isatin, benzotriazole, and succinimide with formaldehyde and methylamine yield monoamines RCH2N(Me)CH2R and methylenediamines RCH2N(Me)CH2N(Me)CH2R. The use of ethylenediamine as the amino compon...

    A. G. Korepin, P. V. Galkin, N. M. Glushakova, V. P. Lodygina… in Russian Chemical Bulletin (2001)

  6. No Access

    Article

    N-Substituted tetrahydro-1,3-oxazines and oxazolidines. 1. A new version of the Mannich reaction involving amino alcohols

    A new version of the Mannich reaction involving amino alcohols (3-aminopropan-1-ol and aminoethanol) was developed. These compounds react with formaldehyde and CH or NH acids to give N-substituted tetrahydro-1...

    A. G. Korepin, P. V. Galkin, N. M. Glushakova… in Russian Chemical Bulletin (2001)

  7. No Access

    Article

    Preparation and properties of secondary amides of 1,1-dinitroalkanecarboxylic acids

    The previously unknown secondary amides of 1,1-dinitroalkanecarboxylic acids were prepared by the reaction of polynitroimidoyl fluorides with water in the presence of mineral acids. They are inert with respect...

    A. G. Korepin, P. V. Galkin, N. I. Golovina, R. F. Trofimova… in Russian Chemical Bulletin (1994)

  8. No Access

    Article

    Polynitro-substitutedN-alkylalkaneimidoyl chlorides

    The reaction of α-fluorosubstituted polynitroalkylaldimines with HCl results in replacement of the fluorine atom by a chlorine atom. The hitherto unknown α-chlorosubstituted polynitroalkylaldimines have been o...

    N. I. Golovina, R. F. Trofimova, L. O. Atovmyan, A. G. Korepin… in Russian Chemical Bulletin (1994)

  9. No Access

    Article

    Preparation and properties of N-fluoro- and N-nitrobis(2,2,2-trinitroethyl)ureas

    Fluorination and nitration of bis(2,2,2-trinitroethyl)urea has given the novel N-fluoro-bis(2,2,2-trinitroethyl)urea and N-nitro-bis(2,2,2-trinitroethyl)urea. The thermal decomposition rates and parameters for...

    V. V. Avdonin, G. A. Volkov, P. V. Galkin… in Bulletin of the Russian Academy of Science… (1992)

  10. No Access

    Article

    1,1,4,4-Tetranitrobutane-2,3-diol and its derivatives. 3. Synthesis of 1,4-dichloro- and 1,4-dibromo-1,1,4,4-tetranitrobutane-2,3-diol dinitrates and their crystalline structure

    1,4-Dichloro- (1) and 1,4-dibromo-1,1,4,4-tetranitrobutane-2,3-diol dinitrates (2) were synthesized by nitration of the corresponding diols with a mixture of trifluoroacetic anhydride and nitric acid. The x-ra...

    B. S. Fedorov, N. I. Golovina… in Bulletin of the Russian Academy of Science… (1992)

  11. No Access

    Article

    Elimination reactions of N,C-difluorides

    Hydrogen fluoride was eliminated from N,C-difluorinated derivatives of bis(polynitroalkyl)amines by the action of alkanols. Previously unreported α-fluoropolynitroalkylaldimines were obtained.

    A. G. Korepin, P. V. Galkin, N. I. Golovina… in Bulletin of the Russian Academy of Science… (1992)

  12. No Access

    Article

    Bis(polynitroalkyl)-N-chloramines

    A series of previously unreported bis(polynitroalkyl)-N-chloramines was obtained by the chlorination of bis(polynitroalkyl)amines.

    A. G. Korenin, V. S. Malygina, P. V. Galkin… in Bulletin of the Academy of Sciences of the… (1991)

  13. No Access

    Article

    Vicinal N,C-difluorination of secondary polynitroalkylamine Mannich bases

    The direct fluorination of Mannich bases containing nitro groups in one or two alkyl substituants in theβ position relative to the amine nitrogen gives previously unreported vicinal N,C-difluorides.

    A. G. Korepin, P. V. Galkin… in Bulletin of the Academy of Sciences of the… (1991)

  14. No Access

    Article

    N-Fluorination of bis(polynitroalkyl)amines

    The fluorination of bis(polynitroalkyl)amines by elemental fluorine in acetic acid gave a series of bis(polynitroalkyl)-N-fluoramines.

    A. G. Korepin, P. V. Galkin, S. A. Eksanov… in Bulletin of the Academy of Sciences of the… (1987)

  15. No Access

    Article

    The uniqueness of the element of best mean approximation to a continuous function using splines with fixed nodes

    Suppose that on the Interval [a, b] the nodes $$a = x_0< x_1< \ldots< x_m< x_{m + 1} = b$$ are given and the funct...

    P. V. Galkin in Mathematical notes of the Academy of Sciences of the USSR (1974)

  16. No Access

    Article

    On the modulus of continuity of the operator of best approximation in the space of continuous functions

    In the paper we establish estimates for the strong and the weak moduli of continuity of the operator of best approximation in the space of continuous functions.

    P. V. Galkin in Mathematical notes of the Academy of Sciences of the USSR (1971)

  17. No Access

    Article

    The possibility of periodic spline interpolation

    A new case of the solvability of the classical interpolation problem for periodic splines is described.

    P. V. Galkin in Mathematical notes of the Academy of Sciences of the USSR (1970)