Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Olga V. Konstantinova"'
Publikováno v:
Vestnik RUDN. International Relations, Vol 23, Iss 1, Pp 157-167 (2023)
The global economy continues to suffer the consequences of the 2020 global recession caused by the COVID-19 pandemic and the dramatic shifts in international relations in 2022 triggered by severe sanctions imposed by Western nations against Russia. M
Externí odkaz:
https://doaj.org/article/bb25334a1433427e854a1af398e58929
Autor:
Eleonora A. Yurieva, Olga V. Konstantinova, Ekaterina S. Vozdvizhenskaya, Maria V. Kushnareva, Sergey L. Morozov, Marina A. Podolnaya
Publikováno v:
Туберкулез и болезни лёгких, Vol 96, Iss 7, Pp 50-54 (2018)
The objective of the study: to compare characteristics and the courses of kidney stone disease and kidney stone disease with concurrent nephrotuberculosis.Subjects and Methods. 100 patients [55/100 ‒ women, 45/100 ‒ men (1.2/1)] with renal tuberc
Externí odkaz:
https://doaj.org/article/882c237ef3b642c7a9052f1e45b2e426
Autor:
Olga V. Konstantinova, A. V. Antonchik, A. L. Gurskii, A. A. Pap, Vladimir N. Zhabinskii, Olga V. Gulyakevich, V. A. Khripach, A. V. Kolosova
Publikováno v:
Chemistry of natural compounds. 2018. Vol. 54, № 1. P. 117-123
An improved synthesis that could produce gram quantities of castasterone was proposed. The starting material was stigmasterol, the cyclic part of which was transformed in the first synthetic step into the 3α,5-cyclo-6-ketone. The side-chain carbon s
Calyculins are a class of highly cytotoxic metabolites originally isolated from the marine sponge Discodermia calyx. To date, a total of twelve different calyculins (A–J) and calyculinamides (A, B and F) have been described, the most abundant (in D
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa0e47beb71fba4250c92b1ba16f8944
https://aaltodoc.aalto.fi/handle/123456789/35991
https://aaltodoc.aalto.fi/handle/123456789/35991
Autor:
V. P. Timofeev, A. R. Mekhtiev, Vladimir N. Zhabinskii, A. Yu. Misharin, Vladimir A. Khripach, Ya. V. Tkachev, Olga V. Konstantinova, Olga V. Gulyakevich
Publikováno v:
Russian Journal of Bioorganic Chemistry. 36:746-754
The convergent synthesis of biosynthetic precursors of brassinosteroids with a Δ2-bond in cycle A—secasterol and 24-episecasterol—was performed. The key stages in the construction of the side chain in these compounds were the Julia olefination o
Autor:
Yuliya Y. Zhiburtovich, Olga V. Konstantinova, Vladimir A. Khripach, Bernd Schneider, Vladimir N. Zhabinskii, Sybille Lorenz, Dmitrii V. Tsavlovskii, Galina V. Ivanova
Publikováno v:
Steroids. 75:27-33
Preparation of partially protected brassinosteroids is achieved through the reaction of the source material (24-epicastasterone and 24-epibrassinolide) with diol-specific reagents (2,2-dimethoxypropane and methylboronic acid). The obtained products w
Autor:
Aede de Groot, Olga V. Konstantinova, Enrique Melguizo, Florence C.E. Sarabèr, Ben J.M. Jansen
Publikováno v:
Tetrahedron 62 (2006) 8
Tetrahedron, 62(8), 1749-1755
Tetrahedron, 62(8), 1749-1755
1-Phenylthio-3-vinyl-cyclohex-1-en-3-ol (2) has been synthesized and investigated as a new bis-annelation reagent for silyl enol ethers. Reagent 2 can be synthesized by a Grignard reaction of vinyl magnesium bromide with 3-phenylthiocyclohexenone. Th
Autor:
A. V. Antonchick, Vladimir N. Zhabinskii, Vladimir A. Khripach, Andrey P. Antonchick, Natalya B. Khripach, Olga V. Konstantinova, Bernd Schneider
Publikováno v:
Steroids. 70:551-562
A new synthesis of both epimeric forms of 26-cholestanoic acids and 26-alcohols containing a 3beta-hydroxy-Delta(5)- or a Delta(4)-3-keto-functionality in ring A is described starting from stigmasterol or (20S)-3beta-acetoxy-pregn-5-en-20-carboxylic
Autor:
Aleš Svatoš, Vladimir A. Khripach, Olga V. Konstantinova, Andrey P. Antonchick, Vladimir N. Zhabinskii, Bernd Schneider
Publikováno v:
Phytochemistry. 66:65-72
The involvement of the 2,3-epoxybrassinosteroids secasterone and 2,3-diepisecasterone in the biosynthesis of castasterone has been demonstrated in seedlings of Secale cereale by LC–ESI-MS. Deuterated secasterone, upon administration to rye seedling
Autor:
Bernd Schneider, Andrey P. Antonchick, Vladimir N. Zhabinskii, Vladimir A. Khripach, Olga V. Konstantinova
Publikováno v:
Phytochemistry. 63:771-776
Two new brassinosteroids, (22R,23R,24S)-22,23-dihydroxy-24-methyl-5alpha-cholest-2-en-6-one (secasterol) and (22R,23R,24S)-22,23-dihydroxy-2alpha,3alpha-epoxy-24-methyl-5alpha-cholest-6-one (2,3-diepisecasterone) have been identified together with a