Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Tomasz Pospieszny"'
Autor:
Grzegorz Hajdaś, Damian Kułaga, Hanna Koenig, Katarzyna Sosnowska, Lucyna Mrówczyńska, Tomasz Pospieszny
Publikováno v:
ACS Omega, Vol 9, Iss 37, Pp 39277-39286 (2024)
Externí odkaz:
https://doaj.org/article/e4b02ab06dab47b1be6c1ba9e2f0b979
Publikováno v:
ACS Omega, Vol 9, Iss 36, Pp 37995-38014 (2024)
Externí odkaz:
https://doaj.org/article/a6736970b9a04e8cb02a43f30babd7bd
Autor:
Beata Jasiewicz, Weronika Kozanecka-Okupnik, Michał Przygodzki, Beata Warżajtis, Urszula Rychlewska, Tomasz Pospieszny, Lucyna Mrówczyńska
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
Abstract A series of fifteen indole derivatives substituted at the C-3 position were synthesized and characterized. The antioxidant activity of all derivatives was investigated by three in vitro antioxidant assays, and the derivative with pyrrolidine
Externí odkaz:
https://doaj.org/article/017779a06b6b4985a8841ab1b91cf341
Autor:
Tomasz Pospieszny
Publikováno v:
Journal of Contemporary Brachytherapy, Vol 11, Iss 6, Pp 505-509 (2019)
Externí odkaz:
https://doaj.org/article/9ff7ec941f5f4cbcb09ce37e0abb69cc
Publikováno v:
Acta Chimica Slovenica, Vol 65, Iss 4, Pp 795-800 (2018)
The mass spectrometric fragmentations of ten new 8-alkylaminocaffeine derivatives were investigated. The fragmentation pathways of new polyamine derivatives of caffeine on the basis of low and high-resolution electron ionization (EI) mass spectra wer
Externí odkaz:
https://doaj.org/article/00a206b97a1b430ab923042c7691edcb
Publikováno v:
Molecules, Vol 20, Iss 11, Pp 20887-20900 (2015)
The methods of synthesis as well as physical, spectroscopic (1H-NMR, 13C-NMR, and FT-IR, ESI-MS), and biological properties of quaternary and dimeric quaternary alkylammonium conjugates of steroids are presented. The results were contrasted with theo
Externí odkaz:
https://doaj.org/article/02917a49401046428167cefeeeeb9317
Publikováno v:
Acta Chimica Slovenica, Vol 62, Iss 1, Pp 15-27 (2015)
The structure of seven bromoacetic substituted derivatives of bile acids are characterized by 1H MMR, 13C NMR, 2D NMR, FT-IR and mass spectrometry (ESI-MS) as well as PM5 semiempirical and B3LYP ab initio methods. Estimation of the pharmacotherapeuti
Externí odkaz:
https://doaj.org/article/87ae95c192674d99995286e936a4c463
Publikováno v:
Molecules, Vol 19, Iss 7, Pp 9419-9434 (2014)
New dimeric quaternary alkylammonium conjugates of sterols were obtained by two step reactions of ergosterol, cholesterol and cholestanol with bromoacetic acid bromide, followed by bimolecular nucleophilic substitution with N,N,N',N'-tetramethyl-1,3-
Externí odkaz:
https://doaj.org/article/e76e66b9d7c14faeba1448d52c7be918
Publikováno v:
Molecules, Vol 19, Iss 4, Pp 4212-4233 (2014)
New quaternary 3-phthalimidopropylammonium conjugates of steroids were obtained by reaction of sterols (ergosterol, cholesterol, cholestanol) and bile acids (lithocholic, deoxycholic, cholic) with bromoacetic acid bromide to give sterol 3β-bromoacet
Externí odkaz:
https://doaj.org/article/39208d93362f49ce80993c8f4ca431c0
Publikováno v:
Molecules, Vol 19, Iss 2, Pp 2557-2570 (2014)
A novel method for the synthesis of bile acid derivatives has been developed using “click chemistry”. Intermolecular 1,3-dipolar cycloaddition of the propargyl ester of bile acids and azide groups of 1,3,5-tris(azidomethyl)benzene gave a new quas
Externí odkaz:
https://doaj.org/article/f4be8d31e5b94f9cb30348cf4fc5640e