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1.
O. V. Nazarova G. M. Pavlov E. E. Kever E. V. Afanas’eva E. F. Panarin 《Russian Journal of Applied Chemistry》2004,77(8):1341-1344
A graft copolymer simulating glycoprotein was prepared by reaction of poly-N-methacryloylaminodeoxyglucose containing terminal amino group with a copolymer of N-vinylpyrrolidone and acrylic acid N-hydroxysuccinimide ester.Translated from Zhurnal Prikladnoi Khimii, Vol. 77, No. 8, 2004, pp. 1356–1359.Original Russian Text Copyright © 2004 by Nazarova, Pavlov, Kever, Afanaseva, Panarin. 相似文献
2.
Yu. V. Shulevich T. Kh. Nguen A. V. Navrotskii I. A. Novakov 《Russian Journal of Applied Chemistry》2009,82(9):1582-1586
Possibility of using complexes based on poly-N,N,N,N-trimethyl[methacryloyloxyethyl]ammonium methyl sulfate and sodium dodecyl sulfate for purification of fat-containing wastewater
was examined. 相似文献
3.
A. I. Vorob’eva M. S. Babaev L. V. Spirikhin N. M. Shishlov S. V. Kolesov 《Russian Journal of Applied Chemistry》2016,89(1):160-164
A copolymer of N,N-diallyl-N,N-dimethylammonium chloride with maleic acid of constant composition was prepared under the conditions of radical initiation. The possibility of the functionalization of the copolymer with drugs containing amino groups by polymer-analogous transformations was examined. Conditions were found for preparing conjugates of the copolymer with isoniazid. The structures and the quantitative compositions of the conjugates were determined by 13С NMR spectroscopy, and the possibility of preparing conjugates with controlled drug content was demonstrated. 相似文献
4.
A. V. Lezov G. E. Polushina A. A. Lezov P. S. Vlasov N. S. Domnina 《Polymer Science Series A》2011,53(2):93-101
The hydrodynamic and conformational properties of molecules of poly(N,N-diallyl-N,N-dimethylammonium chloride) and N,N-diallyl-N,N-dimethylammonium chloride-maleic acid copolymers of different compositions in solutions with various ionic-strength and pH
values, as well as of the polyelectrolyte complex based on the copolymer with dodecyl sulfate anions in chloroform, are studied.
For poly(N,N-diallyl-N,N-dimethylammonium chloride) molecules in a 1 M NaCl solution, the Kuhn segment length and the hydrodynamic diameter of the
chain are estimated as A = 3.9 nm and d = 0.48 nm, respectively. In acidic solutions with pH 3.5, the copolymers demonstrate behavior typical for polyelectrolytes.
In an alkaline solution with pH 13, when 1 M NaCl is added to the solution of the copolymer containing 29 mol % maleic acid
units, there is an antipolyelectrolyte effect that manifests itself as an increase in the intrinsic viscosity of the copolymer
and in the hydrodynamic radius of its molecules. It is found that an increase in the fraction of maleic acid units in the
copolymer from 12 to 42 mol % brings about a reduction in the equilibrium rigidity of its macromolecules from 4.1 to 2.2 nm.
The equilibrium rigidity of polyelectrolyte-complex molecules is higher than that of initial copolymer molecules owing to
steric interactions arising between the aliphatic chains of dodecyl sulfate anions. In an electric field, the molecules of
the complex are oriented owing to the induced dipole moment resulting from the displacement of dodecyl sulfate anions along
the chain contour. 相似文献
5.
A. I. Vorob’eva D. R. Sagitova S. V. Kolesov Yu. B. Monakov 《Russian Journal of Applied Chemistry》2009,82(6):1046-1051
Radical copolymerization of N,N-diallyl-N,N-dimethylammonium chloride with maleic acid in various solvents was studied. The solvent effect on the relative activity of the monomers and the possibility of preparing copolymers of preset composition were examined. 相似文献
6.
Polyampholytes were prepared by radical copolymerization of N,N-diallyl-N,N-dimethylammonium chloride and maleic acid. The esterification and subsequent hydrazinolysis permitted to introduce hydrazide
groups capable of formation of the coordination bond with copper ions. The formation of complex between the hydrazide groups
of polyampholyte and Cu2+ ions was established by electronic spectroscopy. It was shown that the coordination of two hydrazide groups in the complex
was hampered because of the polymeric nature of the ligand. It is shown that the created functionalized polyampholytes exhibit
fungiostatic activity. The highest inhibiting effect on the growth of the pathogenic fungus Fusarium oxysporum is observed for complexes of the hydrazide-containing polyampholytes with Cu2+ ions. 相似文献
7.
8.
A. P. Avdeenko V. V. Pirozhenko S. A. Konovalov D. A. Roman’kov G. V. Palamarchuk O. V. Shishkinc 《Russian Journal of Organic Chemistry》2009,45(3):408-416
Reactions of thiocyanate ion with N-aroyl-, N-arylsulfonyl-, and N-(N-arylsulfonylbenzimidoyl)-1,4-benzoquinone imines follow the 1,4-addition pattern, and the adducts undergo intramolecular cyclization to give the corresponding N-substituted 5-amino-1,3-benzoxathiol-2-ones as final products. 相似文献
9.
A number of (Z)-N,N-dialkyl- and (Z)-N-acyl-N-alkyl-O-methylnicotinamide oximes was synthesized. Their configuration was confirmed by the NOESY experiment. Evaluation of fungicidal
activity of compounds obtained was performed. 相似文献
10.
I. E. Efremova M. I. Vakulenko K. A. Lysenko I. S. Bushmarinov L. V. Lapshina G. A. Berkova V. M. Berestovitskaya 《Russian Journal of General Chemistry》2010,80(11):2298-2305
A modification of 1-nitrocyclohexene synthesis is proposed; its reaction with phenylhydrazine and benzoic acid hydrazide is
shown to afford monoadducts, and with hydrazine hydrate, bisaduct. With diphenylguanidine occurs heterocyclization to 1-phenyl-2-N-phenylamino-4,5,6,7-tetrahydrobenzimidazole, whose structure is confirmed by the X-ray diffraction data. The analysis performed
for this compound of the electron density distribution function in the crystal made it possible to estimate the charge distribution,
π-electrons delocalization nature, and the role of N-H…N, C-H…H-C and C-H…C interactions in the formation of the crystal packing. 相似文献
11.
G. V. Galyaev Yu. I. Morozik A. O. Smirnov 《Russian Journal of General Chemistry》2010,80(8):1593-1601
The electron impact mass spectra were recorded and the key directions of fragmentation of the highly toxic O-alkyl N,N-dialkylamidocyanophosphates were identified. The sets of characteristic ions for the 10 subgroups of the main group of this
class were determined. Based on the values of the mass numbers and peak intensities of characteristic ions generalized spectral
images for each of the 10 studied subgroups of this class were simulated. A new method of group identification of O-alkyl N,N-dialkylamidocyanophosphates was developed. 相似文献
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13.
O. G. Strukov V. B. Kondrat’ev Z. V. Vlasova V. A. Petrunin 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2017,91(1):100-105
Conformers of the biologically active compounds CH3P(O)(OR)(SCH2CH2NR 2 ′ ), where (I) R = i-C4H9, R′ = C2H5 and (II) R = C2H5, R′ = i-C3H7, are calculated within the AM1 level of theory. The elongated and twisted forms with maximum and minimum distances between a nitrogen atom and those of a phosphorus tetrahedron, respectively, and bearing a syn and anti oriented alkoxy group relative to a phosphoryl oxygen, are studied. It is found that the differences between the energy, electronic, and geometric parameters of these forms are apparent in differences between their properties, e.g., the ability to participate in complexation and protonation, reactions that to some extent simulate the interaction between a substance and a biological object. 相似文献
14.
A. A. Amindzhanov F. Dzh. Dzhamoliddinov S. M. Safarmamadov Dzh. A. Davlatshoeva 《Russian Journal of Inorganic Chemistry》2017,62(11):1544-1547
The stepwise complexation of rhenium(V) with N-ethylthiourea has been studied by the potentiometric method in 6 mol/L HCI at 298 K. It has been found that rhenium(V) forms five complex species with this ligand of the following compositions: [ReOLCl4]?, [ReOL2Cl3], [ReOL3Cl2]+, [ReOL4Cl]2+, and [ReOL5]3+. The calculated logarithms of stepwise formation constants of the complexes are the following: logK1 = 4.10 ± 0.05, logK2 = 3.16 ± 0.02, logK3 = 2.61 ± 0.02, logK4 = 2.26 ± 0.02, and logK5 = 1.80 ± 0.02. It has been shown that the introduction of the ethyl radical into the thiourea molecule leads to an increase in the stability of rhenium(V) complexes. 相似文献
15.
L. A. Baltina A. I. Fairushina L. A. Baltina 《Russian Journal of General Chemistry》2015,85(12):2735-2738
Synthesis of amino acid conjugates of glycyrrhizic acid with the use of N-hydroxyphthalimide, N,N'-dicyclohexylcarbodiimide, and tert-butyl esters of L-amino acids (valine, isoleucine, phenylalanine, and methionine) was performed followed by deprotection with trifluoroacetic acid. The target amino acid conjugates were isolated by column chromatography on silica gel in 40–45% yield. The structure of the prepared compounds was confirmed by IR and 13C NMR spectroscopy. 相似文献
16.
E. V. Kondrashov I. B. Rozentsweig I. V. Ushakova G. G. Levkovskaya A. N. Mirskova 《Russian Journal of Organic Chemistry》2007,43(5):641-645
Reaction of aryl-and trifluoromethanesulfonic acids N,N-dichloroamides with tribromoethylene led to the formation of a mixture of N-(2,2-dibromo-2-chloroethylidene)-and N-(2,2,2-tribromoethylidene)amides of the corresponding sulfonic acids. The azomethines ratio is governed by the reaction temperature. 相似文献
17.
T. F. Ibragimov M. G. Levkovich V. A. Saprykina Kh. M. Shakhidoyatov 《Chemistry of Natural Compounds》2010,46(5):767-770
N-Chloroacetylcytisine was synthesized by acylation of (–)-cytisine. Stable Z- and E-conformers with respect to rotational isomerism around the N-12–CO bond were found in PMR spectra at room temperature. The
point at which PMR resonances of the Z- and E-conformers coalesced upon heating was measured. The transition barrier between the conformers was estimated. 相似文献
18.
V. A. Pal’chikov I. N. Tarabara S. V. Shishkina O. V. Shishkin N. Yu. Kol’tsov L. I. Kas’yan 《Russian Journal of Organic Chemistry》2007,43(5):660-673
Reaction products were obtained from bicyclo[2.2.1]hept-5-ene-endo,endo-2,3-dicarboxylic (endic) acid anhydride and ammonia, methyl-, benzyl-, dimethyl-, methylbenzyl-, dibenzyl-, diethyl-, dipropyl-, diisopropyl-, and dipentylamines. The synthesized amido acids were subjected to epoxidation by organic peracids. The structure of compounds obtained was confirmed by IR, 1H and 13C NMR spectra, and in some instances, by X-ray diffraction analysis. 相似文献
19.
Reactions of acetamide and benzamide with N-allyltrifluoromethanesulfonamide in the presence of t-BuOCl–NaI afforded exclusively 2,5-bis(chloromethyl)-1,4-bis(trifluoromethanesulfonyl)piperazine. Analogous reaction with N,N-diallyltrifluoromethanesulfonamide gave mixed halogenation product at only one C=C double bond of the substrate. 相似文献
20.
V. I. Rakhlin R. G. Mirskov T. A. Podgorbunskaya M. G. Voronkov 《Russian Journal of General Chemistry》2007,77(9):1512-1518
The review is devoted to N-halohexamethyldisilazanes, perspective but scantily studied halogenating agents. Methods of preparation, physiochemical characteristics, and synthetic potential are considered. Mechanisms of a number of reactions are presented. 相似文献