Shevchenko Lugansk National University

Luhans’k, Ukraine

Shevchenko Lugansk National University

Luhans’k, Ukraine
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Zvonok E.A.,Shevchenko Lugansk National University | Skutschas P.P.,Saint Petersburg State University
Paleontological Journal | Year: 2011

A dentary fragment and osteoderm of the crocodile Tomistominae indet. from the Middle Eocene (Early Lutetian) Ikovo locality (Lugansk Region, Ukraine) is described. © 2011 Pleiades Publishing, Ltd.


Balyts'kyi O..,Ukrainian Academy of Sciences | Kolesnikov V.O.,Shevchenko Lugansk National University | Eliasz Y.,West Pomeranian University of Technology | Havrylyuk M.R.,Ukrainian Academy of Sciences
Materials Science | Year: 2015

It is shown that, in the course of rolling friction, the intensity of wear of hydrogenated specimens of high-nitrogen manganese steels is five times higher than for nonhydrogenated specimens. As the wear intensity increases, the color of the friction surface of the roller and the sizes of the wear products change. The outward appearance of nonhydrogenated and hydrogenated wear products is noticeably different (white and dark colors, respectively). The microhardness of the hydrogenated layer is equal to 7.6–8.2 GPa, whereas the microhardness of the layer of destroyed domains is 4.2–4.9 GPa. In the destroyed domains with signs of thermal seizure, we observe the elevated contents of carbide-forming elements (in particular, of molybdenum), which confirm the intensification of fracture in the investigated high-nitrogen steels under the conditions of rolling friction in carbide-enriched domains. © 2015 Springer Science+Business Media New York


Dyachenko V.D.,Shevchenko Lugansk National University | Kashner A.Y.,Shevchenko Lugansk National University | Samusenko Y.V.,The National Pedagogical University
Russian Journal of General Chemistry | Year: 2014

Reactions of 2-(methylthio)benzo[cd]indol-1-inium iodide with C-nucleophiles proceed via substitution of methylthio group to afford new naphthostyryl derivatives. The latter were used in synthesis of the Hantzsch thiazoles. Structure of (Z)-2-{benzo[cd]indol-2(1H)-ylidene}-2-(4-phenylthiazol- 2-yl)acetonitrile was studied by XRD. © 2014 Pleiades Publishing, Ltd.


Saraevaa T.A.,Shevchenko Lugansk National University | Khoroshilova G.E.,Shevchenko Lugansk National University | Zubatyuk R.I.,Ukrainian Academy of Sciences | Shishkin O.V.,Ukrainian Academy of Sciences | Shishkin O.V.,University of Kharkiv
Russian Journal of General Chemistry | Year: 2012

Reactions of N-alkyl-2-chloropyridinium salts with benzimidazolylacetonitriles result in (E)-2-(1H-benzo[d ]imidazol-2-yl)-2-[1- alkylpyridin-2(1H)-ylidene]acetonitriles. The alkylation of the latter with ω-bromoacetophenones in boiling acetone may gives rise to the N-alkylated salts, which are stabilized in two configurations, Z and E. The heating of the salts in acetonitrile causes their transformation into 2-({1H-benzo[d ]-imidazol-2(3H)-ylidene}(cyano)methyl)-1-methylpyridinium bromide due to the dearoylmethylation. The structure of the latter was proved by the XRD analysis. © 2012 Pleiades Publishing, Ltd.


Dyachenko I.V.,Shevchenko Lugansk National University | Vovk M.V.,Ukrainian Academy of Sciences
Russian Journal of General Chemistry | Year: 2012

4-Carbamoyl(thiocarbamoyl)-3-thioxo-2,3,5,6,7,8-hexahydroisoquinolines were synthesized by the SNVin reaction of 2-acetyl-1-(N-morpholinyl) acetylcyclohexene with malonothio(dithio)amides. The cyclo-condensation direction was confirmed with the X-ray diffraction analysis of 1-methyl-3-methylthio-5,6,7,8-tetrahydroisoquinoline-4-carboxamide. © Pleiades Publishing, Ltd., 2012.


4-Alkyl-6-amino-4-N 3,N 5-diaryl-2-thioxo-1,2,3,4- tetrahydropyridine-3,5-dicarboxamides were obtained via tandem synthesis involving the Knoevenagel reaction, Michael reaction and intramolecular condensation. Alkylation of the obtained dicarboxamides proceeds regioselectively at the S atom to form the corresponding thioethers. Structure of 6-allylsulfanyl-2-amino-4-isobutyl-N 3,N 5-di-m-tolyl- 3,4-dihydropyridine-3,5-dicarboxamide was uniquely determined by XRD analysis. © 2013 Pleiades Publishing, Ltd.


Dyachenko V.D.,Shevchenko Lugansk National University | Pugach Yu.Yu.,Shevchenko Lugansk National University
Russian Journal of General Chemistry | Year: 2013

Condensation of salicylaldehyde with cyclohexylidenemalononitrile and hydrazine hydrate results in 2-[2-(2-amino-3-cyano-4H-chromen-4-yl) cyclohexylidene]malononitrile, the structure of which was studied by XRD. © 2013 Pleiades Publishing, Ltd.


Dyachenko I.V.,Shevchenko Lugansk National University | Dyachenko V.D.,Shevchenko Lugansk National University
Russian Journal of General Chemistry | Year: 2015

Reaction of 3-amino-3-thioxopropanamides with α-bromoketones has afforded substituted thiazol-2-yl-acetamides. Structure of N-(4-methoxyphenyl)-2-oxo-2-(4-phenylthiazol-2-yl)acetamide has been studied by X-ray diffraction. © 2015 Pleiades Publishing, Ltd.


Dyachenko I.V.,Shevchenko Lugansk National University | Karpov E.N.,Shevchenko Lugansk National University | Dyachenko V.D.,Shevchenko Lugansk National University
Russian Journal of General Chemistry | Year: 2015

Three-component condensation of aliphatic aldehydes with CH-acids has afforded functionalized alkylsubstituted 4H-thiopyrans, 1,2- and 1,4-dihydropyridines, 2-alkylsulfanylpyridines, thieno[2,3-b]pyridines, and cyclohexa-1,3-diene. © 2015 Pleiades Publishing, Ltd.


Abstract Recyclization of 2,6-diamino-4-hetaryl-4H-thiopyran-3,5-dicarbonitriles with α-bromoketones afforded 2-[4-aryl(hetaryl, cyclopropyl)thiazol-2-yl]-3-hetarylacrylonitriles. © 2015 Pleiades Publishing, Ltd.

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