Browsing Artykuły naukowe | Articles by Title
Now showing items 1-20 of 91
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1JCH couplings in Group14/IVA tetramethyls from the gas-phase NMR and DFT structural study: a search for the best computational protocol
(The Royal Society of Chemistry, 2014-05-15)Four tetramethyl compounds EMe4 (E = C, Si, Ge, and Pb) were studied by high-resolution NMR spectroscopy in gaseous and liquid states at 300 K. Extrapolation of experimental vapor-phase C-H J-couplings to a zero-pressure ... -
2-Methoxy-3-[(3,4,5-trimethoxyanilino)- methylidene]-3,4-dihydro-2H-1-benzopyran-4-one
Małecka, Magdalena
; ; (International Union of Crystallography, 2010)
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3-Substituted Blatter Radicals: Cyclization of N-Arylguanidines and N-Arylamidines to Benzo[e][1,2,4]triazines and PhLi Addition
(American Chemical Society, 2023-02-17)A series of 3-amino- and 3-alkyl-substituted 1-phenyl-1,4-dihydrobenzo[e][1,2,4]triazin-4-yls was prepared in four steps involving N-arylation, cyclization of N-arylguanidines and N-arylamidines, reduction of the resulting ... -
3‑Substituted Benzo[e][1,2,4]triazines: Synthesis and Electronic Effects of the C(3) Substituent
(American Chemical Society, 2019)A series of 19 structurally diverse C(3)-substituted derivatives of benzo[e][1,2,4]triazine were synthesized from 3-chloro- (1c) and 3-iodobenzo[e][1,2,4]triazine (1d) obtained in three steps from 2-nitroaniline in 37–55% ... -
6-Amino-2-(pivaloylamino)pyridinium benzoate
(International Union of Crystallography, 2013) -
8-Phenyl-3,4,6,7,8,8a-hexahydro-1H-pyrrolo[2,1-c][1,4]oxazin-6-one
Małecka, Magdalena; ; (International Union of Crystallography, 2011)
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A new class of pyrenyl solid-state emitters: 1-pyrenyl ynones. Synthesis via the Friedel–Crafts route, molecular and electronic structure and photophysical properties
; Plazuk, Damian; ; ; ; ; (The Royal Society of Chemistry, 2014-06-15)
Friedel–Crafts acylation of pyrene with alkynoic acids in the presence of trifluoroacetic anhydride and triflic acid constitutes a direct and efficient route to 1-pyrenyl ynones. These compounds in chloroform solution emit ... -
A photo-Smiles rearrangement: Mechanistic investigation of the formation of Blatter radical helicenes
(ACS, 2025-01-10)Photocyclization of 8-aryloxy-3-phenylbenzo[e]- [1,2,4]triazines leads to helicene radicals. Structural analysis of radicals leuco forms by two-dimensional correlation nuclear magnetic resonance methods demonstrated ... -
A Simplified Method for Simultaneous Determination of α-Lipoic Acid and Low-Molecular-Mass Thiols in Human Plasma
; ; ; ; Głowacki, Rafał (MDPI, 2020)
α-Lipoic acid, glutathione, cysteine, and cysteinylglycine can be applied as therapeutic agents in civilization diseases such as diabetes mellitus, cardiovascular diseases, and cancers. On the other hand, a higher ... -
Addition of Di(trimethylsilyl) Phosphite to Schiff Bases of 2,5-Diformylfuran
(MedJChem, 2011-11)A series of 2,5-Furanyl-bis-(aminomethylphosphonic Acids) has been synthesized by the addition of di(trimethylsilyl) phosphite to azomethine bond of achiral Schiff bases derved from 2,5-diformylfuran. The stereochemical ... -
Anticancer and Antibacterial Activity Studies of Gold(I)-Alkynyl Chromones
(MDPI, 2015)Three gold(I) complexes of alkynyl chromones were synthesized and characterized. The single-crystal X-ray structure analysis of a dinuclear compound and of a flavone derivative exhibit a typical d10 gold(I)-alkynyl linear ... -
Application of a Graphene Oxide–Carbon Paste Electrode for the Determination of Lead in Rainbow Trout from Central Europe
(Springer, 2014-06-22)In the presented study, the content of lead in rainbow trout (Oncorhynchus mykiss) samples was examined. Rainbow trout were purchased in Prague (Czech Republic), Lodz (Poland) and Bratislava (Slovakia) from local fish shops ... -
Application of diethyl ethynylphosphonate to the synthesis of 3‐phosphonylated β‐lactams via the Kinugasa reaction
(ARKAT USA, 2017)The easily available diethyl ethynylphosphonate reacts with diverse aldonitrones under Kinugasa reaction conditions at room temperature, providing 3‐phosphonylated β‐lactams in good yields. In all cases, the reaction ... -
Association between the c.*229C>T polymorphism of the topoisomerase IIb binding protein 1 (TopBP1) gene and breast cancer
; ; ; ; ; ; ; ; ; Bryś, Magdalena (Springer, 2013)
Topoisomerase IIb binding protein 1 (TopBP1) is involved in cell survival, DNA replication, DNA damage repair and cell cycle checkpoint control. The biological function of TopBP1 and its close relation with BRCA1 prompted ... -
Asymmetric Friedel–Crafts Alkylation of Indoles Catalyzed by Chiral Aziridine-Phosphines
; ; ; Rachwalski, Michał (MDPI, 2020)
Over the course of the present studies, a series of optically pure phosphines functionalized by chiral aziridines was synthesized in reasonable/good chemical yields. Their catalytic activity was checked in the enantioselective ... -
Atypical McMurry Cross-Coupling Reactions Leading to a New Series of Potent Antiproliferative Compounds Bearing the Key [Ferrocenyl-Ene-Phenol] Motif
(MDPI, 2014)In the course of the preparation of a series of ferrocenyl derivatives of diethylstilbestrol (DES), in which one of the 4-hydroxyphenyl moieties was replaced by a ferrocenyl group, the McMurry reaction of chloropropionylferrocene ... -
Axially Chiral Stable Radicals: Resolution and Characterization ofBlatter Radical Atropisomers
(American Chemical Society, 2021-09-17)Atropisomers of three Blatter radicals were obtainedby the addition of 8-substituted 1-naphthyllithiums to 3-phenyl and3-t-butylbenzo[e][1,2,4]triazine and separated by chiral high-performance liquid chromatography. Their ... -
Calorimetric and spectroscopic investigations of interactions between cucurbituril Q7 and gemcitabine in aqueous solutions
(Springer Nature [Co-publication with Akadémiai Kiadó, Budapest, Hungary], 2018)Studies on the interactions between cucurbituril Q7 and gemcitabine (Gem) hydrochloride in water were carried out using isothermal titration calorimetry (ITC) and electrospray ionization–mass spectrometry (ESI-MS). According ... -
Carbon-13 longitudinal relaxation time measurements and DFT-GIAO NMR computations for two ammonium ions of a tetraazamacrocyclic scorpiand system
(Springer Netherlands, 2013)Spin-lattice relaxation times, T1s, for 13C nuclei in two cations Hn1n+ (n = 1, 5)of N-(2-amino-ethyl)-cyclam (1, scorpiand) were determined by means of 13C{1H} NMR experiments in aqueous solution at pH 11.5 and 0.2. ... -
Chemo- and regioselective [3 + 2]-cycloadditions of thiocarbonyl ylides: crystal structures of trans-8-benzoyl-1,1,3,3-tetramethyl-7-trifluoromethyl-5-thiaspiro[3.4]octan-2-one and trans-3-benzoyl-2,2-diphenyl-4-(trifluoromethyl)tetrahydrothiophene
(International Union of Crystallography, 2018)