Zobrazeno 1 - 10
of 38
pro vyhledávání: '"A N, Ovcharov"'
Publikováno v:
Вестник Северо-Кавказского федерального университета, Vol 0, Iss 1, Pp 32-35 (2022)
There are considered questions of identify of the durability of details of oil and gas equipment. It is shown formulas for determining the number of loading cycles until cracking. As an example, the calculation of the base detail durability of hydrau
Externí odkaz:
https://doaj.org/article/1e401d7374c84eed94bc841cd7232abd
Publikováno v:
Вестник Северо-Кавказского федерального университета, Vol 0, Iss 6, Pp 22-26 (2022)
In the article there are considered problems of field equipment exploitation of field equipment at low temperatures (below - 40 C°). It was shown that such conditions of exploitation could cause significant change of physico-mechanical properties of
Externí odkaz:
https://doaj.org/article/63553210f72244e9a1b6bb1f894b60c7
Autor:
S. V. Shcherbakov, N. A. Aksenov, V. Yu. Shcherbakova, A. Yu. Magometov, A. Yu. Ivanova, S. N. Ovcharov, A. V. Aksenov
Publikováno v:
Russian Chemical Bulletin. 72:966-971
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c20036f9a6cbc16f556c9016e0b9642c
https://doi.org/10.1007/s11172-023-3861-7
https://doi.org/10.1007/s11172-023-3861-7
Autor:
Nicolai A. Aksenov, Alexander V. Aksenov, Sergei N. Ovcharov, Dmitrii A. Aksenov, Michael Rubin
Publikováno v:
Frontiers in Chemistry, Vol 8 (2020)
Unusual reactivity of nitroalkanes, involving formation of aci-forms (nitronic acids or nitronates) and their subsequent interaction with carbon-based nucleophiles, is surveyed in this review.
Externí odkaz:
https://doaj.org/article/e2a80cc1bcab4ab29f3d889d68bafac3
Autor:
Igor Yu. Grishin, Vladimir V. Malyuga, Dmitrii А. Aksenov, Nikita K. Kirilov, Gasan M. Abakarov, Sergei N. Ovcharov, Andrei V. Sarapii, Nikolai А. Aksenov, Alexander V. Aksenov
Publikováno v:
Chemistry of Heterocyclic Compounds. 58:313-318
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d769c7438eeedbf7f0728c3576e13f6
https://doi.org/10.1007/s10593-022-03090-x
https://doi.org/10.1007/s10593-022-03090-x
Autor:
Viktoriia Yu. Shcherbakova, O. N. Nadein, Alexander V. Aksenov, S. N. Ovcharov, Stanislav V. Shcherbakov
Publikováno v:
Chemistry of Heterocyclic Compounds. 57:1017-1023
A number of nonsymmetrically 2,7-disubstituted 1,3-diazapyrenes were synthesized by the Sonogashira cross coupling of 2-substituted 7-bromobenzo[gh]perimidines with phenyl- and pentylacetylenes. A method of direct one-pot synthesis from 2-substituted
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::154d8715356582ec505f53b6ad090e17
https://doi.org/10.1007/s10593-021-03016-z
https://doi.org/10.1007/s10593-021-03016-z
Autor:
S. V. Shcherbakov, V. V. Dotsenko, Inna V. Aksenova, N. A. Aksenov, V. K. Kindop, A. A. Russkikh, A. V. Bespalov, S. N. Ovcharov
Publikováno v:
Russian Journal of General Chemistry. 91:951-965
Abstract The reaction of 2-amino-1,1,3-tricyanopropene (malononitrile dimer) with isothiocyanates leads to 1-substituted 4,6-diamino-2-thioxo-1,2-dihydropyridine-3,5-dicarbonitriles or 4,6-diamino-2-(phenylimino)-2H-thiopyran-3,5-dicarbonitrile, depe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1630d5f25732b76c1583b6a19ef0f1a3
https://doi.org/10.1134/s1070363221060013
https://doi.org/10.1134/s1070363221060013
Autor:
V. V. Dotsenko, K. A. Frolov, S. N. Ovcharov, A. O. Kurskova, S. V. Shcherbakov, N. A. Aksenov, D. S. Krivokolysko, S. G. Krivokolysko, Inna V. Aksenova
Publikováno v:
Russian Journal of General Chemistry. 91:971-984
Sequential reaction of cyclohexanone with malononitrile and 2-aminopropene-1,1,3-tricarbonitrile in the presence of potassium hydroxide or sodium ethylate in ethanol gave 4-imino-2-(dicyanomethylene)-3-azaspiro[5.5]undecane-1,5-dicarbonitrile. The la
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10eee7af912d28b50ac2a384cec677ed
https://doi.org/10.1134/s1070363221060037
https://doi.org/10.1134/s1070363221060037
Autor:
S. G. Krivokolysko, Inna V. Aksenova, B. S. Krivokolysko, V. V. Dotsenko, S. V. Shcherbakov, N. A. Aksenov, N. A. Pakholka, K. A. Frolov, S. N. Ovcharov
Publikováno v:
Russian Journal of General Chemistry. 91:606-613
The reaction of (2E,4E)-5-phenyl-2-cyano-2,4-pentadienethioamide or (E)-3-(2-nitrophenyl)acrolein and cyanothioacetamide with α-bromoketones afforded new (2E,4E)-5-aryl-2-(4-arylthiazol-2-yl)penta-2,4-dienenitriles. Direct bromination of the latter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2e07b579f2e66ee2cd7d4b87966c0fe
https://doi.org/10.1134/s1070363221040058
https://doi.org/10.1134/s1070363221040058
Autor:
Sergey G. Krivokolysko, Igor V. Bibik, S. V. Shcherbakov, S. N. Ovcharov, Victor V. Dotsenko, K. A. Frolov, N. A. Aksenov, E. Yu. Bibik, Inna V. Aksenova
Publikováno v:
Russian Journal of General Chemistry. 91:154-166
The reaction of cyanothioacetamide with aromatic aldehydes and 1,3-dicarbonyl compounds followed by aminomethylation or S-alkylation gave a series of heterocyclic derivatives with a 1,2,3,4-tetrahydropyridine or 1,4,5,6,7,8-hexahydroquinoline fragmen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1891f56d66a64d047d03cdff218a0485
https://doi.org/10.1134/s107036322102002x
https://doi.org/10.1134/s107036322102002x