Zobrazeno 1 - 10 of 200 pro vyhledávání: '"Z. A. Bredikhina"'
1
A rare case of facial selectivity inversion for Sharpless asymmetric dihydroxylation in a series of structurally homogeneous substrates: synthesis of non-racemic 3-(nitrophenoxy)-propane-1,2-diols
Autor: A. A. Bredikhin, Alexander V. Pashagin, Z. A. Bredikhina, Olga A. Antonovich, Alexey V. Kurenkov
Publikováno v: Tetrahedron: Asymmetry. 25:1015-1021
Asymmetric dihydroxylation of mono nitrophenyl allyl ethers leads to the corresponding non-racemic 3-(nitrophenoxy)-propane-1,2-diols 1a – c . As this takes place, regardless of the reagent used (AD-mix-α or AD-mix-β), the configuration of the pr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::523be20146214e027243df1ef9a6c57b
https://doi.org/10.1016/j.tetasy.2014.05.008
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2
Crystallization Features of the Chiral Drug Timolol Precursor: The Rare Case of Conglomerate with Partial Solid Solutions
Autor: Dmitry V. Zakharychev, Z. A. Bredikhina, Robert R. Fayzullin, A. A. Bredikhin, A. V. Pashagin, Aidar T. Gubaidullin
Publikováno v: Crystal Growth & Design. 14:1676-1683
A synthetic precursor of the chiral drug timolol, 4-[4-(oxiran-2-ylmethoxy)-1,2,5-thiadiazol-3-yl]-morpholine (2) represents a rare case of conglomerate with partial solid solution. This fact was e...
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::24956a1db518ef7bbc674a9b34c47d23
https://doi.org/10.1021/cg4017905
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3
4(2)-Methoxyphenyl glycerol ethers in the synthesis of nonracemic di-O,O-acylglycerols
Autor: V. G. Novikova, Z. A. Bredikhina, Dilyara R. Sharafutdinova, Yu. Ya. Efremov, A. A. Bredikhin
Publikováno v: Russian Chemical Bulletin. 57:2320-2323
Effective methods for the synthesis of nonracemic 4- and 2-methoxyphenyl glycerol ethers from nonracemic 3-chloropropanediols and by direct resolution of the racemate, respectively, were developed. Some existing discrepancies related to the to chirop
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ff60ea49bc2de0a26cde2c8cb86dd0ed
https://doi.org/10.1007/s11172-008-0328-9
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4
ChemInform Abstract: A Rare Case of Facial Selectivity Inversion for Sharpless Asymmetric Dihydroxylation in a Series of Structurally Homogeneous Substrates: Synthesis of Non-racemic 3-(Nitrophenoxy)-propane-1,2-diols
Autor: Olga A. Antonovich, Alexander V. Pashagin, Alexey V. Kurenkov, Z. A. Bredikhina, A. A. Bredikhin
Publikováno v: ChemInform. 46
Regardless of the reagent used (AD-mix-α or AD-mix-β), the configuration of the predominant enantiomer formed in the Sharpless asymmetric dihydroxylation of p- and m-nitrophenyl allyl ethers is opposite to the configuration of the product derived f
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eff67426d623f57f761c994a70c09131
https://doi.org/10.1002/chin.201508024
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5
Jacobsen-type enantioselective hydrolysis of aryl glycidyl ethers.31P NMR analysis of the enantiomeric composition of oxiranes
Autor: Nail M. Azancheev, E. I. Strunskaya, Dilyara R. Sharafutdinova, A. A. Bredikhin, V. G. Novikova, Z. A. Bredikhina
Publikováno v: Russian Chemical Bulletin. 53:213-218
The enantioselective partial hydrolysis of a number of racemic aryl glycidyl ethers in the presence of chiral Co(salen)-catalyst was studied. The enantiomeric composition of the isolated (R)-aryl glycidyl ethers was analyzed by 31P NMR using opticall
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c4a86611e6db56bd9c15fd3675e9b7e8
https://doi.org/10.1023/b:rucb.0000024851.29744.21
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7
[Untitled]
Autor: Z. A. Bredikhina, Nail M. Azancheev, E. I. Strunskaya, A. A. Bredikhin
Publikováno v: Russian Journal of Organic Chemistry. 37:1330-1334
3-Aryloxy-1,2,5-thiadiazoles were synthesized by the Ullmann reaction either from 3-chloro-1,2,5- thiadiazoles and phenols having donor substituents or from 3-hydroxy-1,2,5-thiadiazoles and chlorobenzenes containing acceptor substituents.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::62680da271e97894927669433f5d1aa3
https://doi.org/10.1023/a:1013148125019
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8
Reactions of 4-chloromethyl-1,3,2-dioxathiolane 2-oxides with sodium phenoxide. A reinvestigation
Autor: Z. A. Bredikhina, A. A. Bredikhin, Alexander V. Pashagin
Publikováno v: Russian Chemical Bulletin. 49:1753-1756
The reactions of 4-chloromethyl-1,3,2-dioxathiolane 2-oxides with PhONa in EtOH are accompanied by ring opening under the action of the ethoxide ion rather than leading to a rearrangement of the starting molecule as has been assumed previously. Under
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ee4b95586fb6ac4b5fe92bc909dba1b5
https://doi.org/10.1007/bf02496348
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9
New reaction of glycidols with oxalyl chloride and phosgene—an approach to cyclic esters
Autor: A. A. Bredikhin, Z. A. Bredikhina, Alexander V. Pashagin, E. I. Strunskaya, Igor A. Litvinov, A. T. Gubaydullin
Publikováno v: Russian Chemical Bulletin. 48:2086-2090
2,3-Epoxy alcohols (glycidols) react with carboxylic acid dichlorides to form cyclic esters of 3-chloro-1,2-diols. The reaction proceeds with complete retention of the configuration of the C(2) atom of the initial glycidol and with predominant (but n
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6ffd2148c391d8d5843a84f7fb4c9a24
https://doi.org/10.1007/bf02494853
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