Search results for: Bartosz Trzewik

Items from 1 to 8 out of 8 results

article

In the Search of Glycoside-Based Molecules as Antidiabetic Agents

Aleksandra Pałasz, Dariusz Cież, Bartosz Trzewik, Katarzyna Miszczak, more

Topics in Current Chemistry > 2019 > 377 > 4 > 1-84

This review is an effort to summarize recent developments in synthesis of O-glycosides and N-, C-glycosyl molecules with promising antidiabetic potential. Articles published after 2000 are included. First, the O-glycosides used in the treatment of diabetes are presented, followed by the N-glycosides and finally the C-glycosides constituting the largest group of antidiabetic drugs are described. Within...

article

On the Structure and Reaction Mechanism of Human Acireductone Dioxygenase

Anna Miłaczewska, Ewa Kot, José A. Amaya, Thomas M. Makris, more

Chemistry – A European Journal > 24 > 20 > 5225 - 5237

Acireductone dioxygenase (ARD) is an intriguing enzyme from the methionine salvage pathway that is capable of catalysing two different oxidation reactions with the same substrate depending on the type of the metal ion in the active site. To date, the structural information regarding the ARD–acireductone complex is limited and possible reaction mechanisms are still under debate. The results of joint...

article

Molecular structure and vibrational spectra of 2,2′,4,4′,6-pentabromodiphenyl ether (BDE 100)

Katarzyna Chruszcz-Lipska, Bartosz Trzewik, Bogumiła Winid

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy > 2017 > 182 > C > 50-57

In this work, FT-IR ATR and Raman (laser line 532nm) spectra of 2,2′,4,4′,6-pentabromodiphenyl ether (BDE 100) have been recorded in the range of 4000–650 and 4000–100cm⁻¹, respectively. A combined experimental and theoretical approach (DFT/B3LYP/6-311++g** and aug-cc-pVDZ) was used to study molecular structure of BDE 100. Optimization of geometry in the gas phase at these levels of theory indicated...

article

Titanium Enolate Chemistry at the Beginning of the 21st Century

Dariusz Cież, Aleksandra Pałasz, Bartosz Trzewik

European Journal of Organic Chemistry > 2016 > 8 > 1476 - 1493

The aim of the microreview is to summarize the current state of knowledge in the field of titanium enolate chemistry. The authors focus on stereoselective organic syntheses promoted by titanium enolates and analyze developments in the synthetic methodology observed in this area during the last fifteen years.

article

Synthesis, structural characterization and spectroscopy studies of new oxovanadium(IV, V) complexes with hydrazone ligands

Patrycja Paciorek, Janusz Szklarzewicz, Anna Jasińska, Bartosz Trzewik, more

Polyhedron > 2015 > 87 > Complete > 226-232

The reaction of vanadyl acetoacetonate, VO(acac) ₂ , with 2-hydroxybenzaldehyde hydrazone in ethanol gave the mononuclear oxovanadium(IV) complex [VO(salh ₁ ) ₂ ] (1). However, when the hydrazides 3-hydroxy-2-naphthoic acid hydrazide (h ₂ ) and 5-phenylisoxazole-3-carboxylicacidhydrazide (h ₃ ) were used, the mononuclear oxoethoxovanadium(V) complexes [VO(acanh...

article

Preparation of a new Cd(II)-imprinted polymer and its application to determination of cadmium(II) via flow-injection-flame atomic absorption spectrometry

Marta Gawin, Jadwiga Konefał, Bartosz Trzewik, Stanisław Walas, more

Talanta > 2010 > 80 > 3 > 1305-1310

A new cadmium(II)-imprinted polymer based on cadmium(II) 2,2′-{ethane-1,2-diylbis[nitrilo(E)methylylidene]} diphenolate-4-vinylpyridine complex was obtained via suspension polymerization. The beads were used as a minicolumn packing for flow-injection-flame atomic absorption spectrometry (FI-FAAS) determination of cadmium(II) in water samples. Sorption effectiveness was optimal within pH range of 6...

article

Cu(II)-imprinted styrene–divinylbenzene beads as a new sorbent for flow injection-flame atomic absorption determination of copper

Anna Tobiasz, Stanisław Walas, Bartosz Trzewik, Przemysław Grzybek, more

Microchemical Journal > 2009 > 93 > 1 > 87-92

The paper reports preparation and analytical features of a new Cu(II)-imprinted polymer, based on salen-OMe ligand 2,2′-[ethane-1,2-diylbis(nitrilo(E)methylylidene)]bis(6-allyl-4-methoxyphenol) and styrene–divinylbenzene matrix, as well as its application to on-line preconcentration and flame atomic absorption determination of copper. Sorbent beads (average diameter of 60–80 µm) were obtained using...

article

Application of a metal ion-imprinted polymer based on salen–Cu complex to flow injection preconcentration and FAAS determination of copper

Stanisław Walas, Anna Tobiasz, Marta Gawin, Bartosz Trzewik, more

Talanta > 2008 > 76 > 1 > 96-101

A new Cu(II)-imprinted polymer (Cu-IIP) for preconcentration of copper by liquid–solid extraction via flow injection technique has been proposed. Cu-IIP was obtained by copolymerization of salen–Cu(II) complex with styrene and divinylbenzene using suspension polymerization technique. Granules fraction of 60–80μm in diameter was used as a microcolumn packing. Cu(II) sorption was proved to be the most...

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