Karol Wołosewicz

ORCID: 0000-0001-6164-6428
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About
Contact & Profiles
Research Areas
  • X-ray Diffraction in Crystallography
  • Crystallization and Solubility Studies
  • Asymmetric Synthesis and Catalysis
  • Synthetic Organic Chemistry Methods
  • Synthesis of β-Lactam Compounds
  • Crystallography and molecular interactions
  • RNA modifications and cancer
  • RNA and protein synthesis mechanisms
  • Synthesis and Catalytic Reactions
  • Neurotransmitter Receptor Influence on Behavior
  • Cancer-related gene regulation
  • Chemical Synthesis and Analysis
  • Carbohydrate Chemistry and Synthesis
  • Receptor Mechanisms and Signaling
  • Curcumin's Biomedical Applications
  • Neuroscience and Neuropharmacology Research
  • Analytical Chemistry and Chromatography
  • Organic Chemistry Synthesis Methods
  • Synthesis of Organic Compounds
  • Chemical Synthesis and Reactions
  • Synthesis and Biological Evaluation
  • Cancer Treatment and Pharmacology
  • Bioactive Compounds and Antitumor Agents
  • Synthesis and Reactions of Organic Compounds
  • Plant-based Medicinal Research

OncoArendi Therapeutics (Poland)
2023-2024

Polish Academy of Sciences
2016-2024

Institute of Organic Chemistry
2016-2024

University of Białystok
2004-2021

National Veterinary Research Institute
2016

Eukaryotic mRNAs undergo cotranscriptional 5′-end modification with a 7-methylguanosine cap. In higher eukaryotes, the cap carries additional methylations, such as m6Am─a common epitranscriptomic mark unique to mRNA 5′-end. This is regulated by Pcif1 methyltransferase and FTO demethylase, but its biological function still unknown. Here, we designed synthesized trinucleotide FTO-resistant N6-benzyl analogue of m6Am-cap–m7GpppBn6AmpG (termed AvantCap) incorporated it into using T7 polymerase....

10.1021/jacs.3c12629 article EN cc-by Journal of the American Chemical Society 2024-03-05

Abstract Catalytic enantioselective Kinugasa reactions between acyclic and, for the first time, cyclic nitrones and terminal alkynes are described herein. A catalytic amount of readily available PINAP/CuX complexes, generated in situ, efficiently catalyzed reactions, leading to a series β‐lactams with good enantioselectivities moderate diastereoselectivities yields. broad range alkynes, including seldom reported alkyl‐substituted were tolerated under reaction conditions. Further...

10.1002/ejoc.201600050 article EN European Journal of Organic Chemistry 2016-04-01

Breast cancer is the most common of women-it affects more than 2 million women worldwide. PTP1B phosphatase can be one possible targets for new drugs in breast therapy. In this paper, we present curcumin derivatives featuring a 4-piperidone ring as inhibitors and ROS inducers. We performed cytotoxicity analysis twelve against MCF-7 MDA-MB-231 cell lines human keratinocyte HaCaT line. Furthermore, because known antioxidant, assessed antioxidant effects its derivatives. For potent cytotoxic...

10.3390/ijms221910368 article EN International Journal of Molecular Sciences 2021-09-26

Abstract The recent COVID-19 pandemics have demonstrated the great therapeutic potential of in vitro transcribed (IVT) mRNAs, but improvements their biochemical properties, such as cellular stability, reactogenicity and translational activity, are critical for further practical applications gene replacement therapy anticancer immunotherapy. One strategies to overcome these limitations is chemical modification a unique mRNA 5′-end structure, 5′-cap, which responsible regulating translation at...

10.1093/nar/gkae763 article EN cc-by Nucleic Acids Research 2024-09-09

A new approach to polymeric supports useful for the immobilization of aldehydes and ketones via hydrazone linkers is reported. The strategy gives with better properties effective synthesis all previously used alkylation anchored as hydrazones. In contrast other approaches, also provided a polymer an economical C2 spacer linker. were 3-pentanone, acetone, N-benzylpiperidone, hexanal 3-phenylpropanal in form their polymer-supported hydrazones subjected α-alkylation (LDA/RX) followed by acidic,...

10.1021/cc049874y article EN Journal of Combinatorial Chemistry 2004-11-19

Twelve alkyl analogues ( 1–12 ) of the high‐affinity serotonin transporter SERT inhibitor 6‐nitroquipazine (6‐ NQ were synthesized and studied using in vitro radioligand competition binding assays to determine their affinity K i ). The putative antidepressant activity five binders with highest affinities was by forced swim locomotor mouse tests. three‐dimensional (3 D structures 8 9 determined NOE NMR technique. Flexible docking compounds undertaken illustrate model. Our results showed that...

10.1111/cbdd.12116 article EN Chemical Biology & Drug Design 2013-04-11

This review provides a comprehensive compilation of available literature concerning the synthesis and applications cyclic nitrones derived from sugars hydroxyacids. The most important recent developments concepts related to this topic are emphasized. Keywords: Carbohydrates, nitrones, cycloadditions, hydroxyacids, iminosugars, β-lactams.

10.2174/1385272819666140527230604 article EN Current Organic Chemistry 2014-05-27

The preparation of new solid supports with hydrazine anchoring groups and their application to solid-phase synthesis ketones primary amines are described. were used for immobilization ketones, 4-tert-butylcyclohexanone, pentan-3-one, acetone, N-methylpiperidone, N-benzylpiperidone, tropinone in the form hydrazones. polymer-supported hydrazones subjected deprotonation/alkylation procedure (LDA/RX) once or twice. resulting alkylated products cleaved off support on treatment trifluoroacetic...

10.1055/s-2003-42483 article EN Synthesis 2003-01-01

A general synthetic route to the unknown 1,3‐dicarbonyl tropane derived curcumin analogues was developed. The method based on aldol condensation reaction (40–90 % yield, two steps without product isolation) and acylation of resulting 2‐benzylidenetropinones with substituted cinnamoyl cyanides (yields 41–91 %). Overall 18 new derivatives featuring characteristic curcuminoid hepta‐1,6‐dien‐3,5‐dione structure were synthesized characterized. range aromatic rings in prepared included Ph, m...

10.1002/ejoc.201900416 article EN European Journal of Organic Chemistry 2019-07-02

In the crystal structure of racemic title compound, C(22)H(25)NO(2), solved and refined against sychrotron diffraction data, hy-droxy group carbonyl O atom participate in formation O-H⋯O hydrogen bonds between pairs enanti-omers related by a crystallographic centre symmetry.

10.1107/s1600536812014754 article EN cc-by Acta Crystallographica Section E Structure Reports Online 2012-04-12

Abstract Noteworthy, the Cu salt is shown to have big influence on enantioselectivity of Kinugasa reaction in presence N‐PINAP ligands.

10.1002/chin.201636098 article EN ChemInform 2016-08-01

Abstract Eukaryotic mRNAs undergo co-transcriptional 5’-end modification with a 7-methylguanosine cap. In higher eukaryotes, the cap carries additional methylations, such as m6 A m – common epitranscriptomic mark unique to mRNA 5’-end. This is regulated by Pcif1 methyltransferase and FTO demethylase, but its biological function still unknown. Here, we designed synthesized trinucleotide FTO-resistant N 6-benzyl analog of -cap 7 Gppp Bn6 pG (termed AvantCap ) incorporated it into using T7...

10.1101/2023.11.10.566532 preprint EN cc-by-nd bioRxiv (Cold Spring Harbor Laboratory) 2023-11-10
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