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Dresler E, Woliński P, Wróblewska A, Jasiński R. On the Question of Zwitterionic Intermediates in the [3+2] Cycloaddition Reactions between Aryl Azides and Ethyl Propiolate. Molecules 2023; 28:8152. [PMID: 38138640 PMCID: PMC10745654 DOI: 10.3390/molecules28248152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 12/13/2023] [Accepted: 12/16/2023] [Indexed: 12/24/2023] Open
Abstract
The molecular mechanism of the [3+2] cycloaddition reactions between aryl azides and ethyl propiolate was evaluated in the framework of the Molecular Electron Density Theory. It was found that independently of the nature of the substituent within the azide molecule, the cycloaddition process is realized via a polar but single-step mechanism. All attempts of localization as postulated earlier by Abu-Orabi and coworkers' zwitterionic intermediates were not successful. At the same time, the formation of zwitterions with an "extended" conformation is possible on parallel reaction paths. The ELF analysis shows that the studied cycloaddition reaction leading to the 1,4-triazole proceeds by a two-stage one-step mechanism. It also revealed that both zwitterions are created by the donation of the nitrogen atom's nonbonding electron densities to carbon atoms of ethyl propiolate.
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Affiliation(s)
- Ewa Dresler
- Łukasiewicz Research Network—Institute of Heavy Organic Synthesis “Blachownia”, Energetyków 9, 47-225 Kędzierzyn-Koźle, Poland;
| | - Przemysław Woliński
- Institute of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland;
| | - Aneta Wróblewska
- Department of Organic Chemistry, Faculty of Chemistry, University of Lódź, Tamka 12, 91-403 Łódź, Poland;
| | - Radomir Jasiński
- Institute of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland;
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2
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Silva VLM, Silva AMS. Special Issue "Recent Advances in the Synthesis, Functionalization and Applications of Pyrazole-Type Compounds II". Molecules 2023; 28:5873. [PMID: 37570842 PMCID: PMC10421207 DOI: 10.3390/molecules28155873] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 08/02/2023] [Indexed: 08/13/2023] Open
Abstract
Pyrazole and its derivatives are considered privileged N-heterocycles with immense therapeutic potential [...].
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Affiliation(s)
- Vera L. M. Silva
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Artur M. S. Silva
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
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3
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Dzedulionytė K, Fuxreiter N, Schreiber-Brynzak E, Žukauskaitė A, Šačkus A, Pichler V, Arbačiauskienė E. Pyrazole-based lamellarin O analogues: synthesis, biological evaluation and structure-activity relationships. RSC Adv 2023; 13:7897-7912. [PMID: 36909769 PMCID: PMC9999251 DOI: 10.1039/d3ra00972f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 03/01/2023] [Indexed: 03/12/2023] Open
Abstract
A library of pyrazole-based lamellarin O analogues was synthesized from easily accessible 3(5)-aryl-1H-pyrazole-5(3)-carboxylates which were subsequently modified by bromination, N-alkylation and Pd-catalysed Suzuki cross-coupling reactions. Synthesized ethyl and methyl 3,4-diaryl-1-(2-aryl-2-oxoethyl)-1H-pyrazole-5-carboxylates were evaluated for their physicochemical property profiles and in vitro cytotoxicity against three human colorectal cancer cell lines HCT116, HT29, and SW480. The most active compounds inhibited cell proliferation in a low micromolar range. Selected ethyl 3,4-diaryl-1-(2-aryl-2-oxoethyl)-1H-pyrazole-5-carboxylates were further investigated for their mode of action. Results of combined viability staining via Calcein AM/Hoechst/PI and fluorescence-activated cell sorting data indicated that cell death was triggered in a non-necrotic manner mediated by mainly G2/M-phase arrest.
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Affiliation(s)
- Karolina Dzedulionytė
- Department of Organic Chemistry, Faculty of Chemical Technology, Kaunas University of Technology Radvilėnų pl. 19 LT-50254 Kaunas Lithuania
| | - Nina Fuxreiter
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, Faculty of Life Sciences, University of Vienna Althanstraße 14 1090 Vienna Austria
| | - Ekaterina Schreiber-Brynzak
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, Faculty of Life Sciences, University of Vienna Althanstraße 14 1090 Vienna Austria
| | - Asta Žukauskaitė
- Department of Chemical Biology, Faculty of Science, Palacký University Šlechtitelů 27 CZ-78371 Olomouc Czech Republic
| | - Algirdas Šačkus
- Department of Organic Chemistry, Faculty of Chemical Technology, Kaunas University of Technology Radvilėnų pl. 19 LT-50254 Kaunas Lithuania .,Institute of Synthetic Chemistry, Faculty of Chemical Technology, Kaunas University of Technology K. Baršausko g. 59 LT-51423 Kaunas Lithuania
| | - Verena Pichler
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, Faculty of Life Sciences, University of Vienna Althanstraße 14 1090 Vienna Austria
| | - Eglė Arbačiauskienė
- Department of Organic Chemistry, Faculty of Chemical Technology, Kaunas University of Technology Radvilėnų pl. 19 LT-50254 Kaunas Lithuania
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4
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Li MM, Huang H, Pu Y, Tian W, Deng Y, Lu J. A close look into the biological and synthetic aspects of fused pyrazole derivatives. Eur J Med Chem 2022; 243:114739. [PMID: 36126386 DOI: 10.1016/j.ejmech.2022.114739] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 08/29/2022] [Accepted: 08/31/2022] [Indexed: 11/16/2022]
Abstract
The fusion of pyrazole scaffold with other skeletons creates a class of attractive molecules, demonstrating significant biological and chemical potentiality in the development of medicinal chemistry. Over the past few decades, numerous biologically active molecules featuring fused pyrazole moieties have been excavated and synthesized, some of which represented by sildenafil have been marketed as drugs, and the biological importance together with chemical synthesis strategies of fused pyrazole compounds, including structural modification based on lead compounds, have been steadily progressing. In this review, we focused our attention on the biological importance of fused pyrazoles and highlighted recent progress in the synthesis of this framework over the past 10 years. What' s more, the limitations, challenges, and future prospects were proposed, wishing to provide references for the development of pyrazole fused frameworks in the field of medicinal chemistry. Contents.
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Affiliation(s)
- Mei-Mei Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
| | - Hui Huang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Yiru Pu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Wanrong Tian
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Yun Deng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
| | - Jun Lu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China; Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, 999077, China.
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5
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Urbonavičius A, Fortunato G, Ambrazaitytė E, Plytninkienė E, Bieliauskas A, Milišiūnaitė V, Luisi R, Arbačiauskienė E, Krikštolaitytė S, Šačkus A. Synthesis and Characterization of Novel Heterocyclic Chalcones from 1-Phenyl-1 H-pyrazol-3-ol. Molecules 2022; 27:molecules27123752. [PMID: 35744875 PMCID: PMC9227189 DOI: 10.3390/molecules27123752] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 06/03/2022] [Accepted: 06/07/2022] [Indexed: 11/16/2022] Open
Abstract
An efficient synthetic route to construct diverse pyrazole-based chalcones from 1-phenyl-1H-pyrazol-3-ols bearing a formyl or acetyl group on the C4 position of pyrazole ring, employing a base-catalysed Claisen–Schmidt condensation reaction, is described. Isomeric chalcones were further reacted with N-hydroxy-4-toluenesulfonamide and regioselective formation of 3,5-disubstituted 1,2-oxazoles was established. The novel pyrazole-chalcones and 1,2-oxazoles were characterized by an in-depth analysis of NMR spectral data, which were obtained through a combination of standard and advanced NMR spectroscopy techniques.
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Affiliation(s)
- Arminas Urbonavičius
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų Pl. 19, 50254 Kaunas, Lithuania; (A.U.); (G.F.); (E.A.); (E.P.); (V.M.); (S.K.)
- Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, 51423 Kaunas, Lithuania;
| | - Graziana Fortunato
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų Pl. 19, 50254 Kaunas, Lithuania; (A.U.); (G.F.); (E.A.); (E.P.); (V.M.); (S.K.)
- Department of Pharmacy—Drug Sciences, University of Bari “Aldo Moro”, Via E. Orabona 4, 70125 Bari, Italy;
| | - Emilija Ambrazaitytė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų Pl. 19, 50254 Kaunas, Lithuania; (A.U.); (G.F.); (E.A.); (E.P.); (V.M.); (S.K.)
| | - Elena Plytninkienė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų Pl. 19, 50254 Kaunas, Lithuania; (A.U.); (G.F.); (E.A.); (E.P.); (V.M.); (S.K.)
- Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, 51423 Kaunas, Lithuania;
| | - Aurimas Bieliauskas
- Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, 51423 Kaunas, Lithuania;
| | - Vaida Milišiūnaitė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų Pl. 19, 50254 Kaunas, Lithuania; (A.U.); (G.F.); (E.A.); (E.P.); (V.M.); (S.K.)
- Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, 51423 Kaunas, Lithuania;
| | - Renzo Luisi
- Department of Pharmacy—Drug Sciences, University of Bari “Aldo Moro”, Via E. Orabona 4, 70125 Bari, Italy;
| | - Eglė Arbačiauskienė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų Pl. 19, 50254 Kaunas, Lithuania; (A.U.); (G.F.); (E.A.); (E.P.); (V.M.); (S.K.)
- Correspondence: (E.A.); (A.Š.)
| | - Sonata Krikštolaitytė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų Pl. 19, 50254 Kaunas, Lithuania; (A.U.); (G.F.); (E.A.); (E.P.); (V.M.); (S.K.)
| | - Algirdas Šačkus
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų Pl. 19, 50254 Kaunas, Lithuania; (A.U.); (G.F.); (E.A.); (E.P.); (V.M.); (S.K.)
- Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, 51423 Kaunas, Lithuania;
- Correspondence: (E.A.); (A.Š.)
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Razmienė B, Vojáčková V, Řezníčková E, Malina L, Dambrauskienė V, Kubala M, Bajgar R, Kolářová H, Žukauskaitė A, Arbačiauskienė E, Šačkus A, Kryštof V. Synthesis of N-aryl-2,6-diphenyl-2H-pyrazolo[4,3-c]pyridin-7-amines and their photodynamic properties in the human skin melanoma cell line G361. Bioorg Chem 2021; 119:105570. [PMID: 34953323 DOI: 10.1016/j.bioorg.2021.105570] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 12/10/2021] [Accepted: 12/14/2021] [Indexed: 01/05/2023]
Abstract
A small series of N-aryl-2,6-diphenyl-2H-pyrazolo[4,3-c]pyridin-7-amines was synthesized from easily accessible 1-phenyl-1H-pyrazol-3-ol via 7-iodo-2,6-diphenyl-2H-pyrazolo[4,3-c]pyridine and 7-iodo-4-methyl-2,6-diphenyl-2H-pyrazolo[4,3-c]pyridine intermediates and their subsequent use in palladium catalyzed Buchwald-Hartwig cross-coupling reaction with various anilines. Majority of the compounds were not significantly cytotoxic to melanoma G361 cells in the dark up to 10 µM concentration, but their activity could be increased by irradiation with visible blue light (414 nm). The most active compound 10 possessed EC50 values of 3.5, 1.6 and 0.9 µM in cells irradiated with 1, 5 and 10 J/cm2, respectively. The treatment caused generation of reactive oxygen species in cells and extensive DNA damage, documented by the comet assay and by detection of phosphorylated histone H2A.X, followed by apoptotic cell death. Our results suggest that N-aryl-2,6-diphenyl-2H-pyrazolo[4,3-c]pyridin-7-amines could serve as a potential source of photosensitizing compounds with anticancer activities.
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Affiliation(s)
- Beatričė Razmienė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų pl. 19, Kaunas LT-50254, Lithuania; Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, Kaunas LT-51423, Lithuania
| | - Veronika Vojáčková
- Depatment of Experimental Biology, Faculty of Science, Palacký University, Šlechtitelů 27, Olomouc CZ-78371, Czech Republic
| | - Eva Řezníčková
- Depatment of Experimental Biology, Faculty of Science, Palacký University, Šlechtitelů 27, Olomouc CZ-78371, Czech Republic
| | - Lukáš Malina
- Department of Medical Biophysics, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, Olomouc CZ-77515, Czech Republic
| | - Vaida Dambrauskienė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų pl. 19, Kaunas LT-50254, Lithuania
| | - Martin Kubala
- Department of Experimental Physics, Faculty of Science, Palacký University, 17. listopadu 12, Olomouc CZ-77146, Czech Republic
| | - Robert Bajgar
- Department of Medical Biophysics, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, Olomouc CZ-77515, Czech Republic
| | - Hana Kolářová
- Department of Medical Biophysics, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, Olomouc CZ-77515, Czech Republic
| | - Asta Žukauskaitė
- Department of Chemical Biology, Faculty of Science, Palacký University, Šlechtitelů 27, Olomouc CZ-78371, Czech Republic.
| | - Eglė Arbačiauskienė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų pl. 19, Kaunas LT-50254, Lithuania.
| | - Algirdas Šačkus
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų pl. 19, Kaunas LT-50254, Lithuania; Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, Kaunas LT-51423, Lithuania
| | - Vladimír Kryštof
- Depatment of Experimental Biology, Faculty of Science, Palacký University, Šlechtitelů 27, Olomouc CZ-78371, Czech Republic
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Razmienė B, Řezníčková E, Dambrauskienė V, Ostruszka R, Kubala M, Žukauskaitė A, Kryštof V, Šačkus A, Arbačiauskienė E. Synthesis and Antiproliferative Activity of 2,4,6,7-Tetrasubstituted-2 H-pyrazolo[4,3- c]pyridines. Molecules 2021; 26:6747. [PMID: 34771163 PMCID: PMC8588486 DOI: 10.3390/molecules26216747] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/01/2021] [Accepted: 11/04/2021] [Indexed: 11/26/2022] Open
Abstract
A library of 2,4,6,7-tetrasubstituted-2H-pyrazolo[4,3-c]pyridines was prepared from easily accessible 1-phenyl-3-(2-phenylethynyl)-1H-pyrazole-4-carbaldehyde via an iodine-mediated electrophilic cyclization of intermediate 4-(azidomethyl)-1-phenyl-3-(phenylethynyl)-1H-pyrazoles to 7-iodo-2,6-diphenyl-2H-pyrazolo[4,3-c]pyridines followed by Suzuki cross-couplings with various boronic acids and alkylation reactions. The compounds were evaluated for their antiproliferative activity against K562, MV4-11, and MCF-7 cancer cell lines. The most potent compounds displayed low micromolar GI50 values. 4-(2,6-Diphenyl-2H-pyrazolo[4,3-c]pyridin-7-yl)phenol proved to be the most active, induced poly(ADP-ribose) polymerase 1 (PARP-1) cleavage, activated the initiator enzyme of apoptotic cascade caspase 9, induced a fragmentation of microtubule-associated protein 1-light chain 3 (LC3), and reduced the expression levels of proliferating cell nuclear antigen (PCNA). The obtained results suggest a complex action of 4-(2,6-diphenyl-2H-pyrazolo[4,3-c]pyridin-7-yl)phenol that combines antiproliferative effects with the induction of cell death. Moreover, investigations of the fluorescence properties of the final compounds revealed 7-(4-methoxyphenyl)-2,6-diphenyl-2H-pyrazolo[4,3-c]pyridine as the most potent pH indicator that enables both fluorescence intensity-based and ratiometric pH sensing.
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Affiliation(s)
- Beatričė Razmienė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų pl. 19, LT-50254 Kaunas, Lithuania; (B.R.); (V.D.); (A.Š.)
- Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania
| | - Eva Řezníčková
- Department of Experimental Biology, Palacký University, Šlechtitelů 27, CZ-78371 Olomouc, Czech Republic; (E.Ř.); (V.K.)
| | - Vaida Dambrauskienė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų pl. 19, LT-50254 Kaunas, Lithuania; (B.R.); (V.D.); (A.Š.)
| | - Radek Ostruszka
- Department of Experimental Physics, Faculty of Science, Palacký University, 17. Listopadu 12, CZ-77146 Olomouc, Czech Republic; (R.O.); (M.K.)
| | - Martin Kubala
- Department of Experimental Physics, Faculty of Science, Palacký University, 17. Listopadu 12, CZ-77146 Olomouc, Czech Republic; (R.O.); (M.K.)
| | - Asta Žukauskaitė
- Department of Chemical Biology, Palacký University, Šlechtitelů 27, CZ-78371 Olomouc, Czech Republic
| | - Vladimír Kryštof
- Department of Experimental Biology, Palacký University, Šlechtitelů 27, CZ-78371 Olomouc, Czech Republic; (E.Ř.); (V.K.)
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, CZ-77900 Olomouc, Czech Republic
| | - Algirdas Šačkus
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų pl. 19, LT-50254 Kaunas, Lithuania; (B.R.); (V.D.); (A.Š.)
- Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania
| | - Eglė Arbačiauskienė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų pl. 19, LT-50254 Kaunas, Lithuania; (B.R.); (V.D.); (A.Š.)
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