Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Monika Siepka"'
Autor:
Witold Gładkowski, Monika Siepka, Barbara Żarowska, Agata Białońska, Barbara Gawdzik, Mariusz Urbaniak, Czesław Wawrzeńczyk
Publikováno v:
Molecules, Vol 28, Iss 9, p 3800 (2023)
Four compounds with lactone moiety were synthesized from chalcone 1 in three- or four-step synthesis. γ-Bromo-δ-lactone 5 was the only product of bromolactonization of acid 4 whereas bromolactonization of ester 3, apart from lactone 5 also afforded
Externí odkaz:
https://doaj.org/article/151ba5304f4a460ca02292febb0bd7a5
Autor:
Aleksandra Pawlak, Marta Henklewska, Beatriz Hernández-Suárez, Monika Siepka, Witold Gładkowski, Czesław Wawrzeńczyk, Karolina Motykiewicz-Pers, Bożena Obmińska-Mrukowicz
Publikováno v:
Molecules, Vol 26, Iss 20, p 6295 (2021)
Background: The study investigated four flavanone-derived γ-oxa-ε-lactones: a parent unsubstituted compound and its three derivatives with the methoxy group in positions 2′, 4′ and 8. Our objective was to find out if the introduction of the met
Externí odkaz:
https://doaj.org/article/03ae557a63df491aa141048cf0b6b419
Autor:
Witold Gładkowski, Monika Siepka, Tomasz Janeczko, Edyta Kostrzewa-Susłow, Jarosław Popłoński, Marcelina Mazur, Barbara Żarowska, Wojciech Łaba, Gabriela Maciejewska, Czesław Wawrzeńczyk
Publikováno v:
Molecules, Vol 24, Iss 22, p 4151 (2019)
Six γ-oxa-ε-lactones, 4-phenyl-3,4-dihydro-2H-1,5-benzodioxepin-2-one (5a) and its five derivatives with methoxy groups in different positions of A and B rings (5b−f), were synthesized from corresponding flavanones. Three of the obtained lactones
Externí odkaz:
https://doaj.org/article/7654cba344e1474dbee3b35c4766730e
Autor:
Marta Henklewska, Aleksandra Pawlak, Czesław Wawrzeńczyk, Monika Siepka, Karolina Motykiewicz-Pers, Witold Gładkowski, Bożena Obmińska-Mrukowicz, Beatriz Hernandez-Suarez
Publikováno v:
Molecules, Vol 26, Iss 6295, p 6295 (2021)
Molecules
Volume 26
Issue 20
Molecules
Volume 26
Issue 20
Background: The study investigated four flavanone-derived γ-oxa-ε-lactones: a parent unsubstituted compound and its three derivatives with the methoxy group in positions 2′, 4′ and 8. Our objective was to find out if the introduction of the met
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d9c971c0fd5aa82ea69246215b1c014
https://www.mdpi.com/1420-3049/26/20/6295
https://www.mdpi.com/1420-3049/26/20/6295
Autor:
Jarosław Popłoński, Wojciech Łaba, Barbara Żarowska, Witold Gładkowski, Gabriela Maciejewska, Marcelina Mazur, Tomasz Janeczko, Czesław Wawrzeńczyk, Monika Siepka, Edyta Kostrzewa-Susłow
Publikováno v:
Molecules
Volume 24
Issue 22
Molecules, Vol 24, Iss 22, p 4151 (2019)
Volume 24
Issue 22
Molecules, Vol 24, Iss 22, p 4151 (2019)
Six &gamma
oxa-&epsilon
lactones, 4-phenyl-3,4-dihydro-2H-1,5-benzodioxepin-2-one (5a) and its five derivatives with methoxy groups in different positions of A and B rings (5b&ndash
f), were synthesized from corresponding flavanones. T
oxa-&epsilon
lactones, 4-phenyl-3,4-dihydro-2H-1,5-benzodioxepin-2-one (5a) and its five derivatives with methoxy groups in different positions of A and B rings (5b&ndash
f), were synthesized from corresponding flavanones. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92775445f48978bde1002b1b2e721f3e
Publikováno v:
Tetrahedron: Asymmetry. 26:702-709
A short and efficient chemoenzymatic pathway was developed to produce both enantiomeric forms of allyl alcohols possessing a bulky aromatic substituent at the stereogenic center, namely (E)-4-(2′,5′-dimethylphenyl)-but-3-en-2-ol and (E)-4-(benzo[
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3205a51368db82eabfaa46670925ee7
https://doi.org/10.1016/j.tetasy.2015.05.006
https://doi.org/10.1016/j.tetasy.2015.05.006
Publikováno v:
European Journal of Organic Chemistry. 2015:605-615
Two δ-iodo-γ-lactones and two γ-iodo-δ-lactones substituted at the β-position with phenyl or 4-methylphenyl ring have been synthesized in both enantiomeric forms. The starting materials were enantiomerically enriched allyl alcohols with an (E)-4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::acc1f7cde012b7cbc2f61a63d066e4f6
https://doi.org/10.1002/ejoc.201403343
https://doi.org/10.1002/ejoc.201403343
Autor:
Tomasz Janeczko, Agnieszka Leśniak, Monika Siepka, Radosław Gniłka, Edyta Kostrzewa-Susłow, Monika Dymarska, Jarosław Popłoński
Publikováno v:
Journal of Molecular Catalysis B: Enzymatic. 109:47-52
This research investigated stereochemistry of reduction of racemic flavanone and a concurrent competitive process of oxidation, taking place in cultures of live yeast strains. The results obtained gave us information about capability of tested biocat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::022b6f726b0a88b41ab26f3d6b4072d7
https://doi.org/10.1016/j.molcatb.2014.08.006
https://doi.org/10.1016/j.molcatb.2014.08.006
Autor:
Agata Białońska, Monika Siepka, Witold Gładkowski, Andrzej Skrobiszewski, Mariusz Urbaniak, Angelika Drynda, Marcelina Mazur, Bożena Obmińska-Mrukowicz, Aleksandra Pawlak, Dominik Poradowski
Publikováno v:
Tetrahedron. 69:10414-10423
A series of 20 novel racemic iodo-, bromo- and chlorolactones, possessing β-phenyl-γ-lactone or β-phenyl-δ-lactone framework, were synthesized from commercially available aromatic aldehydes in convenient five-step syntheses. Some of them showed n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c771a9e00890f8aba965506b9aac2e0
https://doi.org/10.1016/j.tet.2013.09.094
https://doi.org/10.1016/j.tet.2013.09.094