Výsledky vyhledávání - "Yuri E. Raifeld"

Effect of A(1,3)-cis strain on the asymmetric epoxidation of (E)- and (Z)-6,6-diethoxy-3-hexen-2-ols and 4-methyl-6,6-diethoxy-3-hexen-2-ols

Autor: Irina G. Taran, Antonia A. Nikitenko, Ving J. Lee, Yuri E. Raifeld, Stanley A. Lang, Boris Arshava, Vitaly I. Shvets, Igor E. Mikerin

Publikováno v: Tetrahedron. 54:11731-11740

The effect of A(1,3)-cis strain on the diastereoselectivity of epoxidation of (E)-and (Z)-6,6-diethoxy-3-hexen-2-ols and 4-methyl-6,6-diethoxy-3-hexen-2-ols is analyzed, with some empiric observations provided. Increased A(1,3)-cis strain results in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3ad608dc9c7dd3c5c12a769ba3e6da8e
https://doi.org/10.1016/s0040-4020(98)83034-2

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Synthesis and crystal structure of 3′-fluoro-3′-methyl-2′,3′-dideoxythymidine. inhibitory properties of 3′-fluoro-3′-methyl-2′,3′-dideoxythymidine-5′-triphosphate in the synthesis of DNA in cell-free media

Autor: Maxim V. Jasko, Antonia A. Nikitenko, Lubov S. Viktorova, Ving J. Lee, Valery E. Zavodnik, Dmitzy G. Semizarov, B. M. Arshava, Anatoly D. Shutalev, Yuri E. Raifeld, Galina V. Gurskaya, Galina Ya. Vid, Igor E. Mikerin

Publikováno v: Bioorganic & Medicinal Chemistry Letters. 4:761-768

The synthesis, physicochemical properties and chain-termination properties of 3′-fluoro-3′-methyl-2′-3-dideoxythymidine is described. The synthesis was accomplished b the coupling of bis(TMS)thymine with 3-fluoro-3-methyl-2,3-dideoxy-D-erythro-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5ca07be1fa8289a1104cd077271dafdb
https://doi.org/10.1016/s0960-894x(01)80197-9

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Synthesis of 3-substituted (azido, acylthio, chloro or fluoro)-2,3-dideoxy-D-erythro-pentoses and 3-methyl-3-substituted-2,3-dideoxy-D-erythro-pentoses

Autor: Ving J. Lee, Yuri E. Raifeld, Igor E. Mikerin, Lubov L. Zilberg, Galina Ya. Vid, Stanley A. Lang, Antonia A. Nikitenko, B. M. Arshava

Publikováno v: Tetrahedron. 50:8603-8616

The enantioselective synthesis of 3-substituted and 3-methyl-3-substituted 2,3-dideoxy-D- erythro -pentoses from (3 R ,4 R )-1,1-diethoxy-3,4-epoxypentane-5-ol, (3 R ,4 R) -1,1-diethoxy-3,4-epoxy-3-methylpentane-5-ol and (2 R ,3 R )-2,3-epoxy-5-hexen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::afd61b5a3188ed5bb6890bbeb2ef184b
https://doi.org/10.1016/s0040-4020(01)85335-7

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Total stereo- and enantio-selective synthesis of 2,3-dideoxy-3-C-methylene-d-glycero-pentose and its ethyl furanosides

Autor: Yuri E. Raifeld, A. A. Nikitenko, Igor E. Mikerin, Galina Ya. Vid, B. M. Arshava

Publikováno v: Carbohydrate Research. 224:103-109

A total stereo- and enantio-selective synthesis of 2,3-dideoxy-3- C -methylene- d - glycero -pentose and its ethyl furanosides is described. The key reaction of the synthesis is formation of the 3- C -methylene function by catalytic isomerisation of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::15185578f3df0dd4f1716829e9a98237
https://doi.org/10.1016/0008-6215(92)84097-c

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A novel reagent for regioselective cleavage of 2,3-epoxyalcohols by fluoride - a synthesis of 3-fluoro-293-dideoxy-d-erythro-pentose

Autor: Stanley A. Lang, Igor E. Mikerin, Yuri E. Raifeld, B. M. Arshava, A. A. Nikitenko, Ving J. Lee

Publikováno v: Tetrahedron Letters. 33:7087-7088

The cleavage of the oxirane ring of 3,4-anhydro-2deoxy-D-threo-pentose diethyl acetal by (isopropoxy)-titanium fluorides is discussed. The high regioselectivity found with bis(isopropoxy)titanium difluoride is the basis for an enantioselective synthe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::04b5ea45bad84c9128291aa2633736de
https://doi.org/10.1016/s0040-4039(00)60842-0

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Compounds of (i-PrO)3 TiX as novel reagents for regioselective oxirane ring opening

Autor: Yuri E. Raifeld, Anotonina A. Nikitenko, B. M. Arshava

Publikováno v: Tetrahedron: Asymmetry. 2:1083-1084

Substituted titanium (IV) triisopropoxides [( i -PrO) 3 TiX] are highly effective reagents for the regioselective ring opening of 2,3-epoxyalcohols.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e4cda34b4209b9bf5653f1c159c6fd55
https://doi.org/10.1016/s0957-4166(00)82001-7

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