Výsledky vyhledávání - "Jolanta Ignatowska"

Ring opening reactions of cyclic sulfamidates. Synthesis of β-fluoroaryl alanines and derivatives of 4,4-difluoroglutamic acid

Autor: Sylwia Bolek, Jolanta Ignatowska

Publikováno v: Journal of Fluorine Chemistry. 217:13-21

Ring opening reactions of 1 with copper complex formed between Cu, TMEDA and BrCF2CO2Et lead to optically active 4,4-difluoroglutamic acid derivatives 11a-d in moderate yields. Reaction of cyclic sulfamidates 1 with fluoro substituted arylmagnesium c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fd58477ca84e9cebcb6886527db04dd3
https://doi.org/10.1016/j.jfluchem.2018.11.003

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New insight into nucleo α-amino acids – Synthesis and SAR studies on cytotoxic activity of β-pyrimidine alanines

Autor: Ewa Mironiuk-Puchalska, Jolanta Ignatowska, Maria Bretner, Mariola Koszytkowska-Stawińska, Piotr Grześkowiak, Patrycja Wińska, Monika Wielechowska, Olena Karatsai, Maria Jolanta Redowicz

Publikováno v: Bioorganic Chemistry

Three series of the β-pyrimidine alanines, including willardiine - a naturally occurring amino acid, were prepared from the l -serine-derived sulfamidates. Compounds 3b, 4a and 4b demonstrated antiproliferative activity toward the studied cancer cel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33438ac10ee5e1c3842f269f2225c55f

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Synthesis of FSO2CF2CF2OCF2I from difluoro(fluorosulfonyl)acetyl fluoride and its relevant salt FSO2CF2CF2O−K+ in the presence of I2 or CF2I2

Autor: Klaus Hintzer, Oleg Shyshkov, Gerd-Volker Röschenthaler, Jolanta Ignatowska

Publikováno v: Journal of Fluorine Chemistry. 147:10-14

The synthesis of FSO 2 CF 2 CF 2 OCF 2 I via two routes was studied: the direct reaction between ICF 2 I and FSO 2 CF 2 CF 2 O − K + and the reaction between FSO 2 CF 2 CF 2 O − K + and difluorocarbene generated from difluoro(fluorosulfonyl)acety

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7ed35319165007b07a7e5aab3f53beab
https://doi.org/10.1016/j.jfluchem.2013.01.001

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TEMPO mediated oxidation of fluorinated alcohols to carboxylic acids

Autor: Tilman C. Zipplies, Jolanta Ignatowska, Oleg Shyshkov, Klaus Hintzer, Gerd-Volker Röschenthaler

Publikováno v: Journal of Fluorine Chemistry. 141:35-40

Fluorinated carboxylic acids (3a–f) have been prepared in good yield by oxidizing the corresponding alcohols (2a–f) in the presence of TEMPO (1) as catalyst, using oxidants like bleach and oxygen.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a66e9d57172a4db6f71c55cb2f4fab41
https://doi.org/10.1016/j.jfluchem.2012.06.002

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Sodium dithionite initiated addition of CF2Br2, CF3I and (CF3)2CFI to allylaromatics

Autor: Jolanta Ignatowska, Wojciech Dmowski

Publikováno v: Journal of Fluorine Chemistry. 128:997-1006

Sodium dithionite initiated addition of CF 2 Br 2 , CF 3 I and (CF 3 ) 2 CFI to the terminal double bond of allylbenzenes and of (CF 3 ) 2 CFI to allylpyridines in a MeCN/H 2 O system were investigated. The reactions of CF 2 Br 2 with allylbenzenes g

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ec7405126f493b6e7317d4820da01dbd
https://doi.org/10.1016/j.jfluchem.2007.04.028

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A Fine-Tuned Molybdenum Hexacarbonyl/Phenol Initiator for Alkyne Metathesis

Autor: Volodymyr Sashuk, Jolanta Ignatowska, Karol Grela

Publikováno v: The Journal of Organic Chemistry. 69:7748-7751

A new, highly potent activator for molybdenum hexacarbonyl and 2-fluorophenol is described. An "instant"catalyst formed in situ from molybdenum hexacarbonyl and 2-fluorophenol shows high activity for cross- and ring-closing alkyne metathesis reaction

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b73c196032447054c0fd64e98184788b
https://doi.org/10.1021/jo049158i

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Sodium dithionite initiated addition of 1-bromo-1-chloro-2,2,2-trifluoroethane to β-pinene

Autor: Jolanta Ignatowska, Krystyna Piasecka-Maciejewska, Wojciech Dmowski

Publikováno v: Journal of Fluorine Chemistry. 125:1147-1151

Sodium dithionite effectively promotes the addition of 1-bromo-1-chloro-2,2,2-trifluoroethane to the exocyclic double bond of β-pinene. The reaction proceeded in an MeCN/H 2 O system to give almost quantitatively a 1:1 mixture of diastereoisomers of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0e17cfa7d95c03600d63a8fd03b9eac1
https://doi.org/10.1016/j.jfluchem.2004.03.001

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Sodium dithionite initiated reactions of 1-bromo-1-chloro-2,2,2-trifluoroethane with enol ethers of cyclic ketones

Autor: Jolanta Ignatowska, Wojciech Dmowski

Publikováno v: Journal of Fluorine Chemistry. 123:37-42

Sodium dithionite initiated reactions of 1-bromo-1-chloro-2,2,2-trifluoroethane (1) with methyl and trimethylsilyl ethers of cyclopentanone and cyclohexanone enols (2a–d) in a MeCN/H2O system were investigated. 2-(2,2,2-Trifluoroethylidene)cyclopen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0a725515c18f5235d15fed473dec76c
https://doi.org/10.1016/s0022-1139(03)00007-1

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