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Добірка наукової літератури з теми "Ligands scorpionates"

Автор: Grafiati

Опубліковано: 29 березня 2025

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Статті в журналах з теми "Ligands scorpionates"

1

Petrosian, Artem, Pedro F. Pinheiro, Ana P. C. Ribeiro, Luísa M. D. R. S. Martins, and Gonçalo C. Justino. "The Elusive Biological Activity of Scorpionates: A Useful Scaffold for Cancer Therapy?" Molecules 29, no. 23 (2024): 5672. https://doi.org/10.3390/molecules29235672.

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Cancer remains a formidable challenge, requiring the constant pursuit of novel therapeutic agents and strategies. Scorpionates, known for their unique coordination properties, have recently gained attention for their anticancer potential. Traditionally applied in catalysis, these compounds have demonstrated notable cytotoxicity across various cancer cell lines, often surpassing the efficacy of conventional chemotherapeutics. This review addresses recent findings on scorpionate complexes, emphasizing the impact of metal choice and ligand design on biological activity. Copper and ruthenium scorp

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2

Sirianni, Eric R., Daniel C. Cummins, Glenn P. A. Yap, and Klaus H. Theopold. "FcTp(R) (R=iPr ortBu): third-generation ferrocenyl scorpionates." Acta Crystallographica Section C Structural Chemistry 72, no. 11 (2016): 813–18. http://dx.doi.org/10.1107/s205322961601202x.

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Scorpionate (or trispyrazolylborate) ligands have seen much structural variation due to the relative ease of modifying their electronic and steric effects. Second-generation scorpionates were created by increasing the bulk in the 3-position of the pyrazole (pz) ring. A new class of third-generation scorpionates was obtained by modifying the remaining boron substituent. A series of thallium(I) and cobalt(II) complexes of the ferrocenyltris(3-R-pyrazolyl)borate ligand [FcTpR;R= isopropyl (iPr) ortert-butyl (tBu)] have been synthesized in order to expand the range of redox-active third-generation

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3

Martins, Luísa, Riccardo Wanke, Telma Silva, et al. "Novel Methinic Functionalized and Dendritic C-Scorpionates." Molecules 23, no. 12 (2018): 3066. http://dx.doi.org/10.3390/molecules23123066.

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The study of chelating ligands is undoubtedly one of the most significant fields of research in chemistry. The present work is directed to the synthesis of new functionalized derivatives of tripodal C-scorpionate compounds. Tris-2,2,2-(1-pyrazolyl)ethanol, HOCH2C(pz)3 (1), one of the most important derivatives of hydrotris(pyrazolyl)methane, was used as a building block for the synthesis of new functionalized C-scorpionates, aiming to expand the scope of this unexplored class of compounds. The first dendritic C-scorpionate was successfully prepared and used in the important industrial catalyti

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4

Nicolas, Emmanuel, Thibault Cheisson, G. Bas de Jong, Cornelis G. J. Tazelaar, and J. Chris Slootweg. "A new synthetic route to the electron-deficient ligand tris(3,4,5-tribromopyrazol-1-yl)phosphine oxide." Acta Crystallographica Section C Structural Chemistry 72, no. 11 (2016): 846–49. http://dx.doi.org/10.1107/s2053229616015035.

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Анотація:

The anionic tris(pyrazolyl)borates, or scorpionates, have proven to be extremely useful ligands. Neutral tris(pyrazolyl)methane ligands, however, are difficult to prepare and require numerous purification steps for a number of substitution patterns. We have previously outlined two different routes for accessing neutral tris(pyrazolyl) ligands. We describe here an adaptation of the previously published procedures for the synthesis of the electron-poor ligand tris(3,4,5-tribromopyrazol-1-yl)phosphine oxide, C9Br9N6OP. Similar electron-deficient ligands have been proven to unlock unique chemistry

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5

Takayama, Tomoaki, Jun Nakazawa, and Shiro Hikichi. "A pseudotetrahedral nickel(II) complex with a tridentate oxazoline-based scorpionate ligand: chlorido[tris(4,4-dimethyloxazolin-2-yl)phenylborato]nickel(II)." Acta Crystallographica Section C Structural Chemistry 72, no. 11 (2016): 842–45. http://dx.doi.org/10.1107/s2053229616012183.

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Poly(pyrazol-1-yl)borates have been utilized extensively in coordination compounds due to their high affinity toward cationic metal ions on the basis of electrostatic interactions derived from the mononegatively charged boron centre. The original poly(pyrazol-1-yl)borates, christened `scorpionates', were pioneered by the late Professor Swiatoslaw Trofimenko and have expanded to include various borate ligands with N-, P-, O-, S-, Se- and C-donors. Scorpionate ligands with boron–carbon bonds, rather than the normal boron–nitrogen bonds, have been developed and in these new types of scorpionate l

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6

Wang, Guocang, Anurag Noonikara-Poyil, Israel Fernández, and H. V. Rasika Dias. "Iron pentacarbonyl ligands on silver scorpionates." Chemical Communications 58, no. 19 (2022): 3222–25. http://dx.doi.org/10.1039/d1cc06859h.

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7

Andrade, Marta A., and Luísa M. D. R. S. Martins. "Novel Chemotherapeutic Agents - The Contribution of Scorpionates." Current Medicinal Chemistry 26, no. 41 (2020): 7452–75. http://dx.doi.org/10.2174/0929867325666180914104237.

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: The development of safe and effective chemotherapeutic agents is one of the uppermost priorities and challenges of medicinal chemistry and new transition metal complexes are being continuously designed and tested as anticancer agents. Scorpionate ligands have played a great role in coordination chemistry, since their discovery by Trofimenko in the late 1960s, with significant contributions in the fields of catalysis and bioinorganic chemistry. Scorpionate metal complexes have also shown interesting anticancer properties, and herein, the most recent (last decade) and relevant scorpionate comp

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8

Gardinier, James R., Alex R. Treleven, Kristin J. Meise, and Sergey V. Lindeman. "Accessing spin-crossover behaviour in iron(ii) complexes of N-confused scorpionate ligands." Dalton Transactions 45, no. 32 (2016): 12639–43. http://dx.doi.org/10.1039/c6dt01898j.

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9

Goldsworthy, Joseph, Simon D. Thomas, Graham J. Tizzard, Simon J. Coles, and Gareth R. Owen. "Adding to the Family of Copper Complexes Featuring Borohydride Ligands Based on 2-Mercaptopyridyl Units." Inorganics 7, no. 8 (2019): 93. http://dx.doi.org/10.3390/inorganics7080093.

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Анотація:

Borohydride ligands featuring multiple pendant donor functionalities have been prevalent in the chemical literature for many decades now. More recent times has seen their development into new families of so-called soft scorpionates, for example, those featuring sulfur based donors. Despite all of these developments, those ligands containing just one pendant group are rare. This article explores one ligand family based on the 2-mercaptopyridine heterocycle. The coordination chemistry of the monosubstituted ligand, [H3B(mp)]− (mp = 2-mercaptopyridyl), has been explored. Reaction of Na[BH3(mp)] w

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10

Trofimenko, Swiatoslaw, Fernando Jové, and Glenn P. A. Yap. "An unusual bis-heteroscorpionate complex with anomalous ligands: [tris(3,4-dibromo-5-phenylpyrazolyl)hydroborato][hydrotris(3-neopentylpyrazolyl)borato]nickel(II)." Acta Crystallographica Section C Structural Chemistry 72, no. 11 (2016): 802–5. http://dx.doi.org/10.1107/s2053229616001376.

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Анотація:

Tridentate trispyrazolylborate (Tp) ligands, introduced by Trofimenko in 1966, have been widely utilized in metal coordination chemistry because of the relatively facile synthetic modification of their electronic and steric factors. The title heteroscorpionate, [Ni(C27H16BBr6N6)(C24H40BN6)], features one ligand, namely hydrotris(3-neopentylpyrazolyl)borate, that has previously displayed variable steric effects, and a brominated ligand, namely tris(3,4-dibromo-5-phenylpyrazolyl)hydroborate, that, atypical in trispyrazolylborate chemistry, coordinates such that the less bulky pyrazole substituen

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