Výsledky vyhledávání - "Z. I. Istomina"

Transformed steroids Communication 130. Effect of the substituent at position 21 on the reaction of ?16-20-ketosteroids with diphenylsulfylimine

Autor: B. S. El'yanov, A. V. Kamernitskii, A. M. Turuma, T. M. Fadeeva, Z. I. Istomina

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 31:2099-2103

The course of the reaction of Δ16-20-ketosteroids with S,S-diphenylsulfylimine depends on the substituent at position 21; it may proceed with cyclization to the 16,17α-epimino-20-ketosteroids, or with formation of 16α-substitutad S-N steroidal yli

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c75d01d0e3d2e3dc968cf7a68a5f5f53
https://doi.org/10.1007/bf00950664

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Cis cleavage of the aziridine ring in 20,20-dimethoxy-16?,17?-epiminopregnenolone by acetic acid

Autor: A. V. Kamernitskii, A. M. Turutu, Z. I. Istomina

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 35:2392-2395

Feasibility was demonstrated for the one-step prepartion of 20-carboethoxyhydrazones of 21-hydroxy-20-ketosteroid [16α,17α]-methyloxazolines by the acetolysis of 20,20-dimethoxy-16α, 17α-epiminopregn-5-ene-3β,21-diol. This reaction is accompanie

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3ce5fde726fa6fc7abcd2f722e25e432
https://doi.org/10.1007/bf00953368

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Transformed steroids. 104. The preparation of [16,17]oxazolidinones of 20-ketosteroids by intramolecular isomerization of 16,17?-N-carboethoxyepiminopregnenolone

Autor: A. M. Turuta, Z. I. Istomina

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 28:2139-2144

A new class of steroid compounds, namely, [16,17α-d]oxazolidin-2′-on-20-ketosteroids, was obtained by the intramolecular cyclization of the hydrazone of 16,17α-N-carboethoxy-epiminopregnenolone which occurs by opening of the aziridine ring.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d152e4e9d71d92330d010cc56ded4a7f
https://doi.org/10.1007/bf00947568

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Biological activity of transformed steroids. XXIII. 20-Ketopregnanes condensed with a three-membered heterocyclic ring at the 16α,17α-position

Autor: T. M. Fadeeva, A. V. Kamernitskii, Z. I. Istomina, O. N. Kruglova, Yu. T. Struchkov, A. M. Turuta, S. V. Lindeman, G. I. Gritsina, A. I. Terekhina

Publikováno v: Pharmaceutical Chemistry Journal. 22:393-398

45 ( 1 9 8 0 ) . 4. Sh. L. Mndzhoyan, M. G. T s i n k e r , A. R. Ovakimyan, e t a l . , K h im . f a rm . Zh . , No. 3, 53-59 (1980). 5. Sh. L. Mndzhoyan, M. S. Kramer, Yu. Z. Ter-Zakharyan, and Sh. G. Oganyan, Khim.-farm. Zh., No. 4, 446-450 (1986)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2f09ccae7e8f36592f547c8c9550ce22
https://doi.org/10.1007/bf00769655

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Transformations of steroids communication 135. Improved method of synthesis of 16,17?-epiminopregnenolone with a corticoid side chain

Autor: Z. I. Istomina, B. S. El'yanov, A. M. Turuta, A. A. Korobov, A. V. Kamernitskii

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 33:821-824

Replacement of the 21-acetate group in 3β,21-diacetoxypregna-5,16-dien-20-one by a tetrahydropyranyl group leads to reaction with S,S-diphenylsulfimine with formation of the 16,17α-aziridine.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::db6ebb073c2c731879bc33d7827b3a7a
https://doi.org/10.1007/bf00947841

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Transformations of steroids Communication 145. Synthesis and transformations of 21-hydroxy-16?,17?-epimino-20-ketosteroids

Autor: B. S. Él'yemov, A. M. Turuta, Z. I. Istomina, T. M. Fadeeva, A. V. Kamernitskii

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 34:841-844

1. A procedure was developed for 21-hydroxylation of 16α,17α-20-ketosteroids useful for preparation of 21-hydroxy-16α,17α-epimino-20-ketosteroids.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::41a3b80f9c23f459c207a5445b72a38e
https://doi.org/10.1007/bf00948073

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Transformed steroids

Autor: A. M. Turuta, A. A. Akhrem, A. V. Kamernitskii, Z. I. Istomina

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 23:393-398

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5db4a1b43a5526fe4af40a6f4c344b49
https://doi.org/10.1007/bf00924695

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Transformed steroids

Autor: T. M. Fadeeva, A. M. Turuta, Z. I. Istomina, A. V. Kamernitskii, Ngo Tkhi Mai An

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 30:499-503

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1f89cf86b07a26ba674402666a046604
https://doi.org/10.1007/bf00949605

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Transformed steroids Communication 151. Mechanism of the condensation of ?16-20-ketosteroids with S.S-diphenylsulfilimine

Autor: A. V. Kamernitskii, A. A. Korobov, Z. I. Istomina, A. M. Turuta, B. S. El'yanov

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 35:1072-1075

Taking 16-dehydrocorticosterone 16-acetate as am example, a new mode of stabilization of the intermediate products of addition of S,S-diphenylsulfilimine to 21-acetoxy-Δ16-20-ketosteroids has been observed, the steroidal S → M ylide (21-acetoxy-16

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::afffae4c00cad3374033a322b29c88b7
https://doi.org/10.1007/bf00955384

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