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Bonastre-Sabater I, Lopera A, Martínez-Camarena Á, Blasco S, Doménech-Carbó A, Jiménez HR, Verdejo B, García-España E, Clares MP. Exo- or endo-1 H-pyrazole metal coordination modulated by the polyamine chain length in [1 + 1] condensation azamacrocycles. Binuclear complexes with remarkable SOD activity. Dalton Trans 2024. [PMID: 38973348 DOI: 10.1039/d4dt01236d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/09/2024]
Abstract
The Cu2+ complexes of three [1 + 1] azacyclophane macrocycles having the 1H-pyrazole ring as the spacer and the pentaamine 1,5,8,11,15-pentaazadecane (L1) or hexaamines 1,5,8,12,15,19-hexaazanonadecane (L2) and 1,5,9,13,17,21-hexaazaheneicosane (L3) as bridges show endo- coordination of the pyrazolate bridge giving rise to discrete monomeric species. Previously reported pyrazolacyclophanes evidenced, however, exo-coordination with the formation of dimeric species of 2 : 2, 3 : 2 or even 4 : 2 Cu2+ : L stoichiometry. The complexes have been characterized in solution using potentiometric studies, UV-Vis spectroscopy, paramagnetic NMR, cyclic voltammetry and mass spectrometry. The measurements show that all three ligands have as many protonation steps in water as secondary amines are in the bridge, while they are able to form both mono- and binuclear Cu2+ species. The crystal structures of the complexes [Cu(HL1)Br]Br(1+x)(ClO4)(1-x)·yH2O (1) and [Cu2(H-1L2)Cl(ClO4)](ClO4)·H2O·C2H5OH (2) have been solved by X-ray diffraction studies. In 1 the metal ion lies at one side of the macrocyclic cavity being coordinated by one nitrogen of the pyrazolate moiety and the three consecutive nitrogen atoms of the polyamine bridge. The other nitrogen of the pyrazole ring is hydrogen-bonded to an amine group. In 2 the two metal ions are interconnected by a pyrazolate bis(monodentate) moiety and complete their coordination spheres with three amines and either a bromide or a perchlorate anion, which occupy the axial positions of distorted square pyramid geometries. Paramagnetic NMR studies of the binuclear complexes confirm the coordination pattern observed in the crystal structures. Cyclic voltamperommetry data show potentials within the adequate range to exhibit superoxide dismutase (SOD) activity. The IC50 values calculated by McCord-Fridovich enzymatic assays show that the binuclear Cu2+ complexes of L2 and L3 have SOD activities that rank amongst the highest ones reported so far.
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Affiliation(s)
- Irene Bonastre-Sabater
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular. Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| | - Alberto Lopera
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular. Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| | - Álvaro Martínez-Camarena
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular. Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, avda. Complutense s/n, 28040 Madrid, Spain
| | - Salvador Blasco
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular. Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| | - Antonio Doménech-Carbó
- Departamento de Química Analítica, Universidad de Valencia, Calle Dr Moliner s/n, 46100 Burjassot, Valencia, Spain
| | - Hermas R Jiménez
- Departamento de Química Inorgánica, Universidad de Valencia, Calle Doctor Moliner s/n, 46100 Burjasot, Valencia, Spain
| | - Begoña Verdejo
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular. Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| | - Enrique García-España
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular. Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| | - M Paz Clares
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular. Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
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2
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Gupta D, Gaur AK, Kaur R, Ashish, Kaur N, Venkataramani S. Photoswitchable Azoheteroarene-Based Chelating Ligands: Light Modulation of Properties, Aqueous Solubility and Catalysis. Chemistry 2023; 29:e202301906. [PMID: 37477625 DOI: 10.1002/chem.202301906] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/19/2023] [Accepted: 07/21/2023] [Indexed: 07/22/2023]
Abstract
We report the design and synthesis of eight photoswitchable phenylazopyridine- and phenylazopyrazole-based molecular systems as chelation-type light-controllable ligands. Besides the studies on fundamental photoisomerization behaviour, the ligands were also screened for light-tuneable properties such as photochromism, phase transition, and solubility, especially in the aqueous medium. This investigation demonstrates how the modulation of aqueous solubility can be achieved through photoisomerization and can further be utilized towards controlling the amount of catalytically active Cu(I) species in the aqueous conditions. Through this approach, light control over the catalytic activity was achieved for Cu-catalyzed azide-alkyne cycloaddition (CuAAC) reactions, along with a partial recovery of the catalytically active species.
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Affiliation(s)
- Debapriya Gupta
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali Sector 81, SAS Nagar, Knowledge City, Manauli, 140 306, India
| | - Ankit Kumar Gaur
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali Sector 81, SAS Nagar, Knowledge City, Manauli, 140 306, India
| | - Ramanpreet Kaur
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali Sector 81, SAS Nagar, Knowledge City, Manauli, 140 306, India
| | - Ashish
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali Sector 81, SAS Nagar, Knowledge City, Manauli, 140 306, India
| | - Navneet Kaur
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali Sector 81, SAS Nagar, Knowledge City, Manauli, 140 306, India
| | - Sugumar Venkataramani
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali Sector 81, SAS Nagar, Knowledge City, Manauli, 140 306, India
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3
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Lin XC, Cui YS, Xie SJ, Chen DP, Zhai DD, Shi ZJ. Jellyfish-type Dinuclear Hafnium Azido Complexes: Synthesis and Reactivity. Chem Asian J 2023; 18:e202300659. [PMID: 37700430 DOI: 10.1002/asia.202300659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 09/11/2023] [Indexed: 09/14/2023]
Abstract
Di- and multinuclear hafnium complexes bridged by ligands have been rarely reported. In this article, a novel 3,5-disubstituted pyrazolate-bridged ligand LH5 with two [N2 N]2- -type chelating side arms was designed and synthesized, which supported a series of dinuclear hafnium complexes. Dinuclear hafnium azides [LHf2 (μ-1,1-N3 )2 (N3 )2 ][Na(THF)4 ] 3 and [LHf2 (μ-1,1-N3 )2 (N3 )2 ][Na(2,2,2-Kryptofix)] 4 were further synthesized and structurally characterized, featuring two sets of terminal and bridging azido ligands like jellyfishes. The reactivity of 3 under reduction conditions was conducted, leading to a formation of a tetranuclear hafnium imido complex [L1 Hf2 (μ1 -NH)(N3 ){μ2 -K}]2 5. DFT calculations revealed that the mixed imido azide 5 was generated via an intramolecular C-H insertion from a putative dinuclear HfIV -nitridyl intermediate.
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Affiliation(s)
- Xin-Cheng Lin
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Yun-Shu Cui
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Si-Jun Xie
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Dong-Ping Chen
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Dan-Dan Zhai
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Zhang-Jie Shi
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
- State Key Laboratory of Organometallic Chemistry, SIOC, CAS, Shanghai, 200032, P. R. China
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4
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Bouroumane N, El Boutaybi M, El Kodadi M, Touzani R, Oussaid A, Hammouti B, Abboud M. Synthesis of new heterocyclic ligands and study of the catecholase activity of catalysts based on copper(II). REACTION KINETICS MECHANISMS AND CATALYSIS 2023. [DOI: 10.1007/s11144-023-02370-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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5
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Horiuchi S, Umakoshi K. Recent advances in pyrazolato-bridged homo- and heterometallic polynuclear platinum and palladium complexes. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Kobelevskaya VА, Larina LI, Popov AV. A Regioselective Synthesis of 5-chloro-1-vinyl- and 3-alkenyl-5-chloro-1H-pyrazoles. Chem Heterocycl Compd (N Y) 2022. [DOI: 10.1007/s10593-022-03139-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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Beukeaw D, Rattanasupaponsak N, Kittikool T, Phakdeeyothin K, Phomphrai K, Yotphan S. Metal‐Free Site‐Selective Direct Oxidative Phosphorylation of Pyrazolones. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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8
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Thermal and kinetic analysis of a new hydrazone-oxime ligand and its cadmium(II) complex: Synthesis, spectral characterization, crystallographic determination and Hirshfeld surface analysis. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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Vishwakarma PK, Jaget PS, Parte MK, Maurya RC, Rajak DK, Chanpuria A, Shukla A, Ali A. Experimental and theoretical evaluation of N-pyridoxal-salicylic acid hydrazide derived copper(II) complex with 2-methylimidazole. J Biomol Struct Dyn 2022:1-12. [PMID: 35696418 DOI: 10.1080/07391102.2022.2085801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
This article deals with the experimental and theoretical evaluations of N-pyridoxal-salicylic acid hydrazide (H2pd-sah) 1 and its mixed-ligand copper(II) complex with 2-methylimidazole, [Cu(pd-sah)(MeImdH)] 2. The compounds were characterized based on spectral (UV/Vis. IR) methods, powder-XRD, elemental analysis, and molar conductivity measurements. Both compounds' molecular structure and charge analysis were computed through B3LYP with 6-311 G (d, p) and LANL2DZ basic set using the Gaussian 09 W program package. The time-dependent density functional theory (TD-DFT) approach is used in gas-phase electronic transitions of 2 using the LANL2DZ basis set. Also, the computed UV-Vis based upon TD-DFT results and IR spectra were simulated for comparison with the experimental ones. The molecular structure based on theoretical investigation reveals that compound 2 adopts a distorted square planer N2O2 coordination sphere around the Cu(II). The ONO donor atoms of hydrazone moiety and one nitrogen of 2-methylimidazole constitute the N2O2 basal plane. Moreover, the in-vitro antioxidant activity was evaluated by DPPH assay in both compounds. In addition, Molecular docking studies were performed to predict the binding interaction between compound 2 and the Human Serum Albumin HSA (PDB ID: 1H9Z).
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Affiliation(s)
- Pradeep Kumar Vishwakarma
- Department of Post-Graduate Studies and Research in Chemistry and Pharmacy, Coordination, Bioinorganic and Computational Chemistry Laboratory, Rani Durgavati Vishwavidyalaya, Jabalpur, India
| | - Pushpendra Singh Jaget
- Department of Post-Graduate Studies and Research in Chemistry and Pharmacy, Coordination, Bioinorganic and Computational Chemistry Laboratory, Rani Durgavati Vishwavidyalaya, Jabalpur, India
| | - Mahendra Kumar Parte
- Department of Post-Graduate Studies and Research in Chemistry and Pharmacy, Coordination, Bioinorganic and Computational Chemistry Laboratory, Rani Durgavati Vishwavidyalaya, Jabalpur, India
| | - Ram Charitra Maurya
- Department of Post-Graduate Studies and Research in Chemistry and Pharmacy, Coordination, Bioinorganic and Computational Chemistry Laboratory, Rani Durgavati Vishwavidyalaya, Jabalpur, India
| | - Deepak Kumar Rajak
- Department of Post-Graduate Studies and Research in Chemistry and Pharmacy, Coordination, Bioinorganic and Computational Chemistry Laboratory, Rani Durgavati Vishwavidyalaya, Jabalpur, India
| | - Aniteshma Chanpuria
- Department of Post-Graduate Studies and Research in Chemistry and Pharmacy, Coordination, Bioinorganic and Computational Chemistry Laboratory, Rani Durgavati Vishwavidyalaya, Jabalpur, India
| | - Abhilasha Shukla
- Department of Post-Graduate Studies and Research in Chemistry and Pharmacy, Coordination, Bioinorganic and Computational Chemistry Laboratory, Rani Durgavati Vishwavidyalaya, Jabalpur, India
| | - Ahad Ali
- Department of Post-Graduate Studies and Research in Chemistry and Pharmacy, Coordination, Bioinorganic and Computational Chemistry Laboratory, Rani Durgavati Vishwavidyalaya, Jabalpur, India
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10
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Adach A, Tyszka-Czochara M, Bukowska-Strakova K, Rejnhardt P, Daszkiewicz M. In situ synthesis, crystal structure, selective anticancer and proapoptotic activity of complexes isolated from the system containing zerovalent nickel and pyrazole derivatives. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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11
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Crystal structure of (Z)-4-(((4-fluorophenyl)amino)(furan-2-yl)methylene)-5-methyl-2-phenyl-2,4-dihydro-3 H-pyrazol-3-one. Z KRIST-NEW CRYST ST 2022. [DOI: 10.1515/ncrs-2022-0173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C22H16FN3O2, triclinic, P
1
‾
$\overline{1}$
(no. 2), a = 8.7335(18) Å, b = 9.967(2) Å, c = 11.968(3) Å, α = 70.677(4)°, β = 86.259(4)°, γ = 65.759(4) Å, V = 893.4(3) Å3, Z = 2, R
gt
(F) = 0.0543, wR
ref
(F
2) = 0.1677, T = 296(2) K.
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12
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Lu Y, Tsegaw YA, Wodyński A, Li L, Beckers H, Kaupp M, Riedel S. Investigation of Molecular Iridium Fluorides IrF n (n=1-6): A Combined Matrix-Isolation and Quantum-Chemical Study. Chemistry 2022; 28:e202104005. [PMID: 35181951 PMCID: PMC9310635 DOI: 10.1002/chem.202104005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Indexed: 12/03/2022]
Abstract
The photo-initiated defluorination of iridium hexafluoride (IrF6 ) was investigated in neon and argon matrices at 6 K, and their photoproducts are characterized by IR and UV-vis spectroscopies as well as quantum-chemical calculations. The primary photoproducts obtained after irradiation with λ=365 nm are iridium pentafluoride (IrF5 ) and iridium trifluoride (IrF3 ), while longer irradiation of the same matrix with λ=278 nm produced iridium tetrafluoride (IrF4 ) and iridium difluoride (IrF2 ) by Ir-F bond cleavage or F2 elimination. In addition, IrF5 can be reversed to IrF6 by adding a F atom when exposed to blue-light (λ=470 nm) irradiation. Laser irradiation (λ=266 nm) of IrF4 also generated IrF6 , IrF5 , IrF3 and IrF2 . Alternatively, molecular binary iridium fluorides IrFn (n=1-6) were produced by co-deposition of laser-ablated iridium atoms with elemental fluorine in excess neon and argon matrices under cryogenic conditions. Computational studies up to scalar relativistic CCSD(T)/triple-ζ level and two-component quasirelativistic DFT computations including spin-orbit coupling effects supported the formation of these products and provided detailed insights into their molecular structures by their characteristic Ir-F stretching bands. Compared to the Jahn-Teller effect, the influence of spin-orbit coupling dominates in IrF5 , leading to a triplet ground state with C4v symmetry, which was spectroscopically detected in solid argon and neon matrices.
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Affiliation(s)
- Yan Lu
- Freie Universität BerlinInstitut für Chemie und Biochemie-Anorganische ChemieFabeckstrasse 34/3614195BerlinGermany
| | - Yetsedaw A. Tsegaw
- Freie Universität BerlinInstitut für Chemie und Biochemie-Anorganische ChemieFabeckstrasse 34/3614195BerlinGermany
| | - Artur Wodyński
- Technische Universität BerlinInstitut für Chemie Theoretische Chemie/Quantenchemie Sekr. C7Strasse des 17. Juni 13510623BerlinGermany
| | - Lin Li
- Freie Universität BerlinInstitut für Chemie und Biochemie-Anorganische ChemieFabeckstrasse 34/3614195BerlinGermany
| | - Helmut Beckers
- Freie Universität BerlinInstitut für Chemie und Biochemie-Anorganische ChemieFabeckstrasse 34/3614195BerlinGermany
| | - Martin Kaupp
- Technische Universität BerlinInstitut für Chemie Theoretische Chemie/Quantenchemie Sekr. C7Strasse des 17. Juni 13510623BerlinGermany
| | - Sebastian Riedel
- Freie Universität BerlinInstitut für Chemie und Biochemie-Anorganische ChemieFabeckstrasse 34/3614195BerlinGermany
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13
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Feng C, Hua FZ, Guo JJ, Lv CP, Zhao H. Structural Elucidation and Electrochemiluminescence on a 3D Cadmium(II) MOF with 5-c Topology. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02236-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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14
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Deng L, Lin RY, Zhou ZH. Isolated molybdenum-based microporous POMs for selective adsorption of gases. Dalton Trans 2022; 51:5239-5249. [DOI: 10.1039/d2dt00134a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dodecanuclear, icosanuclear and octanuclear porous MOF-like POMs materials [MoV12O12(μ2-O)4(μ3-O)12(Htrz)4(trz)4]∙nH2O (n = 22, 1; n = 92, 2; Htrz = 1H-1,2,3-triazole), [MoV8O8(μ2-O)12(Htrz)8]½∙[MoV12O12(μ2-O)4(μ3-O)12(Htrz)4(trz)4]∙44H2O (3), and [MoV8O8(μ2-O)12(Htrz)8]·62H2O (4) have been obtained and well...
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15
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Jeong S, Joo JM. Transition-Metal-Catalyzed Divergent C-H Functionalization of Five-Membered Heteroarenes. Acc Chem Res 2021; 54:4518-4529. [PMID: 34886664 DOI: 10.1021/acs.accounts.1c00547] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Conversion of common reactants to diverse products is a key objective of organic syntheses. Recent developments in transition-metal-catalyzed C-H functionalization have increased the interest in such conversions. Both the position of functionalization and the type of the substituent can be varied, allowing systematic diversification of common structural cores. Because five-membered heteroarenes (pyrazole, imidazole, thiazole, pyrrole, and thiophene) are ubiquitous in pharmaceuticals and organic functional materials, the selective C-H functionalization of these heterocyclic cores facilitates both the optimization of their physicochemical properties and streamlining of their preparation. In addition, the parent forms of these heterocycles are more readily available and inexpensive than any other derivatives of their families. Hence, their nondirected C-H functionalization is highly desirable. Although various regioselective reactions have been developed, many of them target the most reactive site; hence, except for some extensively studied arylation reactions, regiodivergent functionalization of two or more sites has been limited.This Account summarizes our work on the regiodivergent, nondirected C-H functionalization of five-membered heteroarenes with alkenes and alkynes. These unsaturated hydrocarbons are readily available, and all the composing atoms can be incorporated into products with high atom efficiency. Furthermore, the installed alkenyl groups can be transformed to other useful functional groups. To achieve comparable selectivity to that observed in the traditional reactions of these heteroarenes with highly electrophilic reagents and strong bases, a transition metal catalytic system was carefully devised with a more streamlined synthesis. A judicious choice of metals, ligands, acid and base additives, and solvents orchestrates divergent transformations using electronic and steric effects of the heteroarenes. Although C-H cleavage is a rate- and site-selectivity-determining step in most cases, the subsequent steps involving the formation of C-C bonds are often more critical than the other steps. For the C-H cleavage step, modulating the electronic properties of catalysts to make them electrophilic allows preferential alkenylation at the nucleophilic position. In addition, the presence of an internal base that can be exploited for concerted metalation-deprotonation of the acidic C-H bond offers alternative regioselectivity. Furthermore, we developed our own ligand system based on a conformationally rigid pyrazolonaphthyridine scaffold that enables aerobic C-H alkenylation reactions with steric control. We showed that the electronic and steric effects of heteroarenes can be further extended to chemodivergent reactions with norbornene derivatives. Depending on whether the palladacycle is formed, heteroarenes selectively undergo 1:2 annulation with norbornene derivatives and three-component reactions with other azoles through the Pd-norbornene adducts or Catellani and 2:1 annulation reactions through the palladacycle intermediates.Other research groups have also contributed to the development of divergent reactions, in investigations ranging from the pioneering studies in the early days of research on C-H functionalization to recent studies with new ligands. We have also discussed these studies in context. These approaches provide access to many heteroarenes with systematically varied substituents. We believe that new ligand systems and mechanistic insights gained through these studies will enrich fields beyond C-H functionalization of five-membered heteroarenes.
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Affiliation(s)
- Siyeon Jeong
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
| | - Jung Min Joo
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
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Das B, Dolai M, Ghosh A, Dhara A, Mahapatra AD, Chattopadhyay D, Mabhai S, Jana A, Dey S, Misra A. A bio-compatible pyridine-pyrazole hydrazide based compartmental receptor for Al 3+ sensing and its application in cell imaging. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:4266-4279. [PMID: 34591947 DOI: 10.1039/d1ay00963j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
For practical applications, the development of bio-compatible organic molecules as p-block ion chemosensors is critical. Herein, we report the single crystal (SC) of new pyridine-pyrazole derived Al3+ sensor H2PPC [(Z)-N'-(2,3-dihydroxybenzylidene)-5-methyl-1-(pyridin-2-yl)-1H-pyrazole-3-carbohydrazide] as well as its Cu-complex SC. The probe exhibits an "off-on" fluorescence response towards Al3+ ions, and this has been modulated with different solvents. For selective detection of Al3+ ions, a special coordination pocket in the structural backbone is advantageous. The chemosensor exhibits a submicromolar detection level (LOD = 4.78 μM) for Al3+. The density functional theory (DFT) and time-dependent DFT (TD-DFT) calculations of H2PPC and [Al(HPP)2]+ (1) reveal that a change of the structural conformation of probe H2PPC upon complexation causes the pyrazole and pyridine units to create a specific cavity to tether Al3+, and consequently H2PPC proves to be a promising molecule for Al3+ detection. Furthermore, the probe has been successfully used to evaluate Al3+ as a low-cost kit using filter paper strips, and the in situ Al3+ ion imaging in Vero cells as well as A549 cell lines shows the sensor's nuclear envelope penetrability, indicating that it has great potential for biological and environmental applications.
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Affiliation(s)
- Bhriguram Das
- Department of Chemistry, Vidyasagar University, Midnapore, 721102, West Bengal, India.
- Department of Chemistry, Tamralipta Mahavidyalaya, Purba Medinipur, 721636, India.
| | - Malay Dolai
- Department of Chemistry, Prabhat Kumar College, Contai, Purba Medinipur, 721404, West Bengal, India
| | - Avijit Ghosh
- Center for Research in Nanoscience and Nanotechnology, University of Calcutta, Technology Campus, Salt Lake, Kolkata 700106, India
| | - Anamika Dhara
- Department of Chemistry, Hiralal Mazumdar Memorial College for Women, Dakshineswar, North 24 Parganas, Kolkata 700035, India
| | - Ananya Das Mahapatra
- ICMR-Virus Unit, ID & BG Hospital Campus, 57 Dr Suresh C Banerjee Road, Beliaghata, Kolkata 700010, India
| | - Debprasad Chattopadhyay
- ICMR-Virus Unit, ID & BG Hospital Campus, 57 Dr Suresh C Banerjee Road, Beliaghata, Kolkata 700010, India
- ICMR-National Institute of Traditional Medicine, Nehru Nagar, Belagavi 59001, Karnataka, India
| | - Subhabrata Mabhai
- Department of Chemistry, Mahishadal Raj College, Purba Medinipur, 721628, India
| | - Atanu Jana
- Division of Physics and Semiconductor Science, Dongguk University, Seoul, 04620, South Korea.
| | - Satyajit Dey
- Department of Chemistry, Tamralipta Mahavidyalaya, Purba Medinipur, 721636, India.
| | - Ajay Misra
- Department of Chemistry, Vidyasagar University, Midnapore, 721102, West Bengal, India.
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Pandya KM, Battula S, Naik PJ. Pd-catalyzed post-Ugi intramolecular cyclization to the synthesis of isoquinolone-pyrazole hybrid pharmacophores & discover their antimicrobial and DFT studies. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153353] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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18
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Patel AK, Jadeja RN, Butcher R, Kumar A. Mononuclear copper(II) complexes with (Z)-N′-{(2-hydroxynapthalen-1-yl}methylene)acetohydrazide: X-ray single-crystal structures, Hirshfeld analysis, X-band epr spectra, DFT calculations and SOD mimetic activity. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120489] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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19
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Abushamleh AS, Abu-Safieh KA, Khanfar MA, Taher D, Tahtamouni L, Alwahsh NJ. NOVEL PALLADIUM(II) COMPLEXES OF PYRAZOLE-CONTAINING SCHIFF BASE LIGANDS: SYNTHESIS, STRUCTURAL CHARACTERIZATION, AND CYTOTOXICITY OF THE PALLADIUM(II) COMPLEXES OF 2-{1-[2-(1,3-DIMETHYL-4-NITRO-1H-PYRAZOL-5-YL) HYDRAZONO]ETHYL} PYRIDINE (APHP) AND ITS ANALOGUE 2-{1-[2-(1,3-DIMETHYL-4-NITRO- 1H-PYRAZOL-5-YL)HYDRAZONO]METHYL} PYRIDINE (PCHP). J STRUCT CHEM+ 2021. [DOI: 10.1134/s0022476621070167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Abdel‐Motaal M, El‐Senduny FF, Shaaban S. One‐Pot Synthesis and Anticancer Activity of Novel Pyrazole Hybrids. ChemistrySelect 2021. [DOI: 10.1002/slct.202101649] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Marwa Abdel‐Motaal
- Organic Chemistry Division Department of Chemistry College of Science Mansoura University Egypt
- Department of Chemistry College of Science Qassim University Buraidah 51452 Saudi Arabia
| | - Fardous F. El‐Senduny
- BioChemistry Division Department of Chemistry College of Science Mansoura University Egypt
| | - Saad Shaaban
- Organic Chemistry Division Department of Chemistry College of Science Mansoura University Egypt
- Department of Chemistry College of Science King Faisal University, P.O. Box 380 Al-Ahsa 31982 Saudi Arabia
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21
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Panigrahi A, Muniraj N, Prabhu KR. N-Triflination of pyrazolones: a new method for N-S bond formation. Org Biomol Chem 2021; 19:5534-5538. [PMID: 34105585 DOI: 10.1039/d1ob00862e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A simple method, which takes place quickly in 5 min, is developed for the N-triflination of pyrazolones using CF3SO2Na (Langlois reagent) and phenyliodine(iii)bis(trifluoroacetate) (PIFA). This reaction takes place at the imine nitrogen centre instead of the more reactive C4-position, forming a new N-S bond. A variety of pyrazolone derivatives were subjected to the reaction. Unlike the previous reports on sulfenylation or sulfonylation of pyrazolone, wherein the corresponding C-S bond is formed, this new method leads to the formation of the hetero-hetero atom bond (N-S bond) at room temperature.
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Affiliation(s)
- Ahwan Panigrahi
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India.
| | - Nachimuthu Muniraj
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India.
| | - Kandikere Ramaiah Prabhu
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India.
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22
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Pascual-Escudero A, Ortiz-Rojano L, Simón-Fuente S, Adrio J, Ribagorda M. Aldehydes as Photoremovable Directing Groups: Synthesis of Pyrazoles by a Photocatalyzed [3+2] Cycloaddition/Norrish Type Fragmentation Sequence. Org Lett 2021; 23:4903-4908. [PMID: 34097415 DOI: 10.1021/acs.orglett.1c01665] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A straightforward methodology for the regioselective synthesis of pyrazoles has been developed by a domino sequence based on a photoclick cycloaddition followed by a photocatalyzed oxidative deformylation reaction. Distinguishing features of this protocol include an unprecedented photoredox-catalyzed Norrish type fragmentation under green-light irradiation and the use of α,β-unsaturated aldehydes as synthetic equivalents of alkynes, where the aldehyde is acting as a novel photoremovable directing group.
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Affiliation(s)
- Ana Pascual-Escudero
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Laura Ortiz-Rojano
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Silvia Simón-Fuente
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Javier Adrio
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain.,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - María Ribagorda
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain.,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
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23
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Synthetic strategies, crystal structures and biological activities of metal complexes with the members of azole family: A review. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115093] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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24
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Kim HT, Kang E, Kim M, Joo JM. Synthesis of Bidentate Nitrogen Ligands by Rh-Catalyzed C–H Annulation and Their Application to Pd-Catalyzed Aerobic C–H Alkenylation. Org Lett 2021; 23:3657-3662. [DOI: 10.1021/acs.orglett.1c01040] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Hyun Tae Kim
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
| | - Eunsu Kang
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
| | - Minkyu Kim
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
| | - Jung Min Joo
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
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25
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Construction of five non-covalent-fabricated Zn2+/Cd2+ supramolecules from 3,5-dimethylpyrazole: Their synthesis and features. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129818] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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26
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Sehout I, Boulebd H, Boulcina R, Nemouchi S, Bendjeddou L, Bramki A, Merazig H, Debache A. Synthesis, crystal structure, Hirshfeld surface analysis, biological evaluation, DFT calculations, and in silico ADME analysis of 4-arylidene pyrazolone derivatives as promising antibacterial agents. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129586] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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New Syntheses, Analytic Spin Hamiltonians, Structural and Computational Characterization for a Series of Tri-, Hexa- and Hepta-Nuclear Copper (II) Complexes with Prototypic Patterns. CHEMISTRY 2021. [DOI: 10.3390/chemistry3010031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
We present a series of pyrazolato-bridged copper complexes with interesting structures that can be considered prototypic patterns for tri-, hexa- and hepta- nuclear systems. The trinuclear shows an almost regular triangle with a μ3-OH central group. The hexanuclear has identical monomer units, the Cu6 system forming a regular hexagon. The heptanuclear can be described as two trinuclear moieties sandwiching a central copper ion via carboxylate bridges. In the heptanuclear system, the pyrazolate bridges are consolidating the triangular faces, which are sketching an elongated trigonal antiprism. The magnetic properties of these systems, dominated by the strong antiferromagnetism along the pyrazolate bridges, were described transparently, outlining the energy levels formulas in terms of Heisenberg exchange parameters J, within the specific topologies. We succeeded in finding a simple Kambe-type resolution of the Heisenberg spin Hamiltonian for the rather complex case of the heptanuclear. In a similar manner, the weak intermolecular coupling of two trimer units (aside from the strong exchange inside triangles) was resolved by closed energy formulas. The hexanuclear can be legitimately proposed as a case of coordination-based aromaticity, since the phenomenology of the six-spins problem resembles the bonding in benzene. The Broken-Symmetry Density Functional Theory (BS-DFT) calculations are non-trivial results, being intrinsically difficult at high nuclearities.
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28
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Choe S, Lee H, Nayab S. Diverse coordination geometry of cobalt (II), zinc (II), and cadmium (II) complexes comprising
N
,
N
‐bis(1H‐pyrazol‐1‐yl)methyl)amines derivatives: Synthesis, structures, and ring opening polymerization of
rac
‐lactide. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6204] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Solhye Choe
- Department of Chemistry and Green‐Nano Materials Research Center Kyungpook National University Daegu South Korea
| | - Hyosun Lee
- Department of Chemistry and Green‐Nano Materials Research Center Kyungpook National University Daegu South Korea
| | - Saira Nayab
- Department of Chemistry Shaheed Benazir Bhutto University Sheringal Dir (U) Pakistan
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29
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Patel AK, Jadeja RN, Butcher R, Kesharwani MK, Kästner J, Muddassir M. New copper(II) complexes with (Z)-N′-{(2-hydroxynaphthalen-1-yl}methylene)acetohydrazide]: X-ray structure, Hirshfeld analysis, X-band electron paramagnetic resonance spectra, TD-DFT calculations and superoxide dismutase mimetic activity. Polyhedron 2021. [DOI: 10.1016/j.poly.2020.114969] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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30
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Choe S, Lee H, Nayab S. Synthesis, structures, and catalytic efficiency in ring opening polymerization of rac-lactide with tridentate vs. bidentate cobalt( ii), zinc( ii), and cadmium( ii) complexes containing N-substituted N, N-bis((3,5-dimethyl-1 H-pyrazol-1-yl)methyl)amine ligands. RSC Adv 2021; 11:18840-18851. [PMID: 35478641 PMCID: PMC9033469 DOI: 10.1039/d1ra02365a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 05/20/2021] [Indexed: 01/09/2023] Open
Abstract
A series of Co(ii), Zn(ii), and Cd(ii) complexes supported by 1-(3,5-dimethyl-1H-pyrazol-1-yl)-N-((3,5-dimethyl-1H-pyrazol-1-yl)methyl)-N-(furan-2-ylmethyl)methanamine (LA) and N,N-bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)-4-isopropylaniline (LB) were synthesized. The direct chelation of CoCl2·6H2O, ZnCl2, and CdBr2·4H2O by the ligands produced [LnMX2] (Ln = LA or LB; M = Zn or Co, with X = Cl; M = Cd, with X = Br) complexes in high yields. Structural studies revealed that [LBCoCl2] and [LBZnCl2] adopted distorted tetrahedral geometries, as LB coordinated the metal centers in a bidentate fashion, while LA coordinated the metal centers in a tridentate fashion through the nitrogen atoms of the pyrazole and amine moieties, so that [LACoCl2] and [LAZnCl2] exhibited trigonal bipyramidal geometries and [LACdBr2] a square pyramidal geometry. [LBCdBr2] has two Cd-containing structures per unit cell, whereby one Cd center adopted a distorted tetrahedral geometry and the other exhibited square bipyramidal geometry. The in situ-generated alkyl derivatives of the synthesized complexes were assessed in the ring-opening polymerization of rac-lactide. Heterotactic polylactides (PLAs) were furnished with all complexes. The [LBZnCl2]/MeLi system produced PLA with a superior heterotactic bias (Pr up to 0.94) at −25 °C. PLAs with wide-ranging polydispersity indices (1.16–2.23) and low molecular weights were produced in all cases, irrespective of the specific M(II) center and ancillary ligand utilized. Co(ii), Zn(ii), and Cd(ii) complexes supported by bis-pyrazolyl ligands were applied to the ring-opening polymerization of rac-lactide to produce heterotactic polylactides (PLAs) with superior heterotactic bias i.e. Pr up to 0.94 at −25 °C.![]()
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Affiliation(s)
- Solhye Choe
- Department of Chemistry and Green-Nano Materials Research Center
- Kyungpook National University
- Daegu
- Republic of Korea
| | - Hyosun Lee
- Department of Chemistry and Green-Nano Materials Research Center
- Kyungpook National University
- Daegu
- Republic of Korea
| | - Saira Nayab
- Department of Chemistry
- Shaheed Benazir Bhutto University
- Islamic Republic of Pakistan
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31
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Jana K, Maity R, Puschmann H, Mitra A, Ghosh R, Debnath SC, Shukla A, Mahanta AK, Maity T, Samanta BC. A binuclear chloride bridged Cu(II) and a mononuclear Ni(II) complex: Synthesis, crystal structure, photo catalytic and biological studies. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120067] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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32
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Chen YJ, Chen MY, Lee KT, Shen LC, Hung HC, Niu HC, Chung WS. 1,3-Alternate Calix[4]arene Functionalized With Pyrazole and Triazole Ligands as a Highly Selective Fluorescent Sensor for Hg 2+ and Ag + Ions. Front Chem 2020; 8:593261. [PMID: 33282834 PMCID: PMC7688584 DOI: 10.3389/fchem.2020.593261] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 09/14/2020] [Indexed: 01/30/2023] Open
Abstract
We report here the synthesis of a 1,3-alternate calix[4]arene 8, with bis-pyrazolylmethylpyrenes on the one end and bis-triazolylmethylphenyls on the other end, as a homoditropic fluorescent sensor for both Hg2+ and Ag+ ions. Calix[4]arene 3, with lower-rim bis-pyrazolylmethylpyrenes in cone conformation, was also synthesized as a control compound. UV-Vis and fluorescence spectra were used for metal ions screening, and we found that both ligands 8 and 3 showed strong excimer emission of pyrenes when they are as a free ligand in CHCl3/MeOH (v/v, 3:1) solution; however, they both showed a high selectivity toward Hg2+ and Ag+ ions with strong fluorescence quenching and yet with different binding ratios. The fluorescence of ligand 8 was strongly quenched by Hg2+ but was only partially quenched by Ag+ ions; however, the fluorescence of ligand 3 was strongly quenched by Hg2+, Ag+, and Cu2+ ions. Job plot experiments showed that ligand 8 formed a 1:2 complex with both Hg2+ and Ag+ ions; ligand 3 formed a 1:1 complex with Hg2+, but it formed a 2:3 complex with Ag+. The binding constant of ligand 3 with Hg2+ and Ag+ ions was determined by the Benesi-Hildebrand plot of UV-vis titration experiments to be 2.99 × 103 and 3.83 × 103 M−1, respectively, while the association constant of ligand 8 with Hg2+ and Ag+ was determined by Hill plot to be 1.46 × 1012 and 9.24 × 1011 M−2, respectively. Ligand 8 forms a strong complex with either two Hg2+ or two Ag+ ions using both the upper and lower rims of the 1,3-alternate calix[4]arene as the binding pockets; hence, it represents one of the highly selective fluorescent sensors for the homoditropic sensing of Hg2+ and Ag+ ions.
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Affiliation(s)
- Yin-Ju Chen
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
| | - Meng-Yu Chen
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
| | - Kun-Ti Lee
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
| | - Li-Ching Shen
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
| | - Hao-Chih Hung
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
| | - Hao-Che Niu
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
| | - Wen-Sheng Chung
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
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33
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Vynohradov OS, Pavlenko VA, Fritsky IO, Gural’skiy IA, Shova S. Synthesis and Crystal Structure of Copper(II) 9-Azametallacrowns-3 with 4-Iodopyrazole. RUSS J INORG CHEM+ 2020. [DOI: 10.1134/s0036023620100228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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34
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Sharma S, Malakar CC, Singh V. Transition‐Metal‐Free C‐S Bond Forming Strategy towards Synthesis of Highly Diverse Pyrazole Tethered Benzothiazoles: Investigation of their Photophysical Properties. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000390] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Shubham Sharma
- Shubham Sharma Dr. Virender Singh Department of Chemistry Dr B R Ambedkar National Institute of Technology Jalandhar Punjab 144011 India
| | - Chandi C. Malakar
- Dr. Chandi C. Malakar Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 India
| | - Virender Singh
- Shubham Sharma Dr. Virender Singh Department of Chemistry Dr B R Ambedkar National Institute of Technology Jalandhar Punjab 144011 India
- Dr. Virender Singh Department of Chemistry Central University of Punjab Bathinda Punjab 151001 India
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35
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3,5-disusbtituted-N-hydroxyalkylpyrazole Cu(II) compounds: Anion effect on dimensionality, supramolecular structure and magnetic properties. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114686] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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36
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Copper(II) complexes containing N′-aromatic group substituted N,N′,N-bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)amines: Synthesis, structures, polymerization of methyl methacrylate and ring opening polymerization of rac-lactide. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114641] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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37
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Lopera A, Gil-Martínez A, Pitarch-Jarque J, Verdejo B, Blasco S, Clares MP, Jiménez HR, García-España E. Influence of the chain length and metal : ligand ratio on the self-organization processes of Cu 2+ complexes of [1 + 1] 1H-pyrazole azamacrocycles. Dalton Trans 2020; 49:8614-8624. [PMID: 32543616 DOI: 10.1039/d0dt01056a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Three new [1 + 1] macrocycles formed by the reaction of 1H-3,5-bis(chloromethyl)pyrazole with the tosylated amines 1,4,7,10-tetraazadecane (L1), 1,4,8,11-tetraazaundecane (L2) and 1,5,10,14-tetraazatetradecane (L3) are described. Potentiometric studies and HR-ESI-Mass spectrometry show the formation of dimeric binuclear Cu2+ complexes whose organization depends on the type of hydrocarbon chains connecting the amine groups. Furthermore, trinuclear or/and tetranuclear complexes are formed depending also on the length of the polyaminic bridge and on the sequence of the hydrocarbon chains. The crystal structures of the [2 + 2] [Cu2(H(H-1L2))2](ClO4)4·4H2O (1) and [Cu2(H-1L2)2](ClO4)2 (2) complexes show in both of them two macrocycles self-assembled by the metal ions which interconnect their pyrazolate fragments that behave as bis(monodentate) ligands. While in 1 one central amine of each macrocycle binds to the axial position of a distorted square-pyramid and the other ones remain protonated, in 2 all the amine groups are involved in the coordination giving rise to a strongly distorted octahedral geometry. Paramagnetic 1H NMR measurements support that these structures also form in solution. Interestingly, tetranuclear complexes [Cu4(H-1L4)2(OH)2.08](ClO4)2.92Br0.54Cl0.46 (3) and [Pd2.39Cu1.61(H-1L4)2(OH)2](ClO4)2Cl1.33Br0.67·2.87H2O (4) have been isolated for the macrocycle containing the 1,5,9,13-tetraamine chain (L4). 3 has two binucleating units, one of them formed by the pyrazolate moieties and their neighbouring secondary amines and the other by the two central amines of both macrocycles. This latter Cu2+ coordination site is completed by two hydroxide anions as bridging ligands. 4 was obtained from a solution prepared to achieve full formation of the dimeric cage [Cu2(H-1(HL4))2]4+ by addition of K2PdCl4. The Pd2+ ion due to its softer acidic characteristics displaces the Cu2+ ions from the pyrazolate site. UV-vis spectroscopy suggests that the exchange is completed at room temperature after one hour.
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Affiliation(s)
- Alberto Lopera
- Instituto de Ciencia Molecular, Universidad de Valencia, c/Catedrático José Beltrán Martínez 2, 46980 Paterna, Valencia, Spain.
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Soldevila-Sanmartín J, Guerrero M, Choquesillo-Lazarte D, Giner Planas J, Pons J. Dimeric metallacycles and coordination polymers: Zn(II), Cd(II) and Hg(II) complexes of two positional isomers of a flexible N,O-hybrid bispyrazole derived ligand. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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39
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40
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Komorski S, Leszczyński MK, Justyniak I, Lewiński J. Structural diversity of ethylzinc derivatives of 3,5-substituted pyrazoles. Dalton Trans 2020; 49:17388-17394. [PMID: 33211038 DOI: 10.1039/d0dt03026k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Equimolar reactions of Et2Zn with 3,5-dimethylpyrazole (H-pzMe2), 3,5-di-iso-propylpyrazole (H-pziPr2), 3,5-di-tert-butylpyrazole (H-pztBu2) and indazole (H-ind) were investigated in toluene or tetrahydrofuran (as a coordinating solvent). A series of diverse ethylzinc pyrazolates and indazolates were identified using advanced NMR spectroscopy and the single crystal X-ray diffraction techniques. The NMR experiments indicate that dimeric moieties of the general formula [EtZn(pz)]2 or [Et2Zn2(pz)2(THF)] are favoured in solution. Nevertheless, these types of complexes are kinetically labile and tend to undergo ligand scrambling reactions according to the Schlenk equilibrium. For example, the alkyl substituents in the pzMe2 and pziPr2 ligands do not appear to be a strong determinant of the dimeric moieties and the composition of the isolated complexes by crystallisation from the parent reaction mixture varies between spiro-type tri- and tetranuclear aggregates, [Et2Zn3(pz)4(THF)x] (x = 0 or 2) and [Et2Zn4(pz)6(THF)2], respectively. The nonstoichiometric formula of these organozinc derivatives is likely related to both the Schlenk-type equilibria and solubility of the respective moieties. In turn, the high steric demands of the 3,5-di-tert-butylpyrazolate ligand promote the dimeric form in solution and the solid state. Interestingly, the ethylzinc indazolate complex also does not undergo a redistribution reaction and yields a dimer.
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Affiliation(s)
- Szymon Komorski
- Department of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
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41
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Akhmetova VR, Akhmadiev NS, Abdullin MF, Dzhemileva LU, D'yakonov VA. Synthesis of new N,N′-Pd(Pt) complexes based on sulfanyl pyrazoles, and investigation of their in vitro anticancer activity. RSC Adv 2020; 10:15116-15123. [PMID: 35495460 PMCID: PMC9052211 DOI: 10.1039/c9ra09783j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 03/24/2020] [Indexed: 11/21/2022] Open
Abstract
The synthesis of new N,N′-mononuclear bi-ligand Pd(ii) and tri-ligand Pt(ii)complexes bearing sulfanyl(phenyl, benzyl, cyclohexyl, 4-hydroxyphenyl)3,5-dimethyl-1H-pyrazole ligands has been carried out. The obtained compounds were studied for apoptosis-inducing activity and effect on the cell cycle for Jurkat, K562, and U937 neoplastic cell cultures and conditionally normal human embryonic kidney HEK293 cells. The cells showed the highest sensitivity to platinum and palladium complexes in comparison with ligands and cisplatin. The cytotoxic properties are enhanced for compounds with cyclohexyl substituents at the S-atom in sulfanyl pyrazoles and complexes. Efficient cytostatics against Jurkat, K562 and U937 neoplastic cell lines were found among the synthesized new Pd(ii) and Pt(ii)complexes (six examples) with sulfanyl-1H-pyrazole ligands using in vitro assay.![]()
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Affiliation(s)
- Vnira R. Akhmetova
- Institute of Petrochemistry and Catalysis
- Russian Academy of Sciences
- 450075 Ufa
- Russian Federation
| | - Nail S. Akhmadiev
- Institute of Petrochemistry and Catalysis
- Russian Academy of Sciences
- 450075 Ufa
- Russian Federation
| | - Marat F. Abdullin
- Ufa Institute of Chemistry
- Russian Academy of Sciences
- 450054 Ufa
- Russian Federation
| | - Lilya U. Dzhemileva
- Institute of Petrochemistry and Catalysis
- Russian Academy of Sciences
- 450075 Ufa
- Russian Federation
| | - Vladimir A. D'yakonov
- Institute of Petrochemistry and Catalysis
- Russian Academy of Sciences
- 450075 Ufa
- Russian Federation
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42
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Petrosyants SP. Inner- and Outer-Sphere Coordination of Acido and Neutral N,O-Donor Ligands in the Rare-Earth Metal Complexes. RUSS J COORD CHEM+ 2019. [DOI: 10.1134/s1070328419100051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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43
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Imidazole‐Bridged Tetrameric Group(IV) Heteroleptic Complexes from the Spontaneous Metal‐Ligand Assembly of a Potentially
N
4
‐Tetradentate Ligand. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900763] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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44
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CuII2, CuII4 and CuII6 complexes with 3-(2-pyridyl)pyrazolate. Structure, magnetism and core interconversion. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.07.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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45
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Seo J, Lee J, Kim E, Lee H, Jeon J, Nayab S. Synthesis, structures and reactivity of cobalt(II) complexes supported by N,N,N′,N″-tetradentate N′-substituted bis((1H-pyrazol-1-yl)methyl)amine. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.119071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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46
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Ta S, Ghosh M, Salam N, Ghosh S, Brandão P, Félix V, Hira SK, Manna PP, Das D. Oxovanadium(V) and Dioxomolybdenum(VI) Complexes of Amide-Imine Conjugates: Structures, Catalytic and Antitumor Activities. ACS APPLIED BIO MATERIALS 2019; 2:3964-3973. [PMID: 35021329 DOI: 10.1021/acsabm.9b00527] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Three new amide-imine conjugates, namely [(E)-2-hydroxy-N'-((2-hydroxynaphthalen-1-yl)methylene)benzohydrazide] (SALNP), [(E)-N'-(4-(diethylamino)-2-hydroxybenzylidene)-2-hydroxybenzohydrazide] (SALSD), and [(E)-N'-(3-ethoxy-4-hydroxybenzylidene)-2-hydroxybenzohydrazide] (SALVN), derived by reacting 2-hydroxybenzohydrazide (SAL) with three different aldehyde, 2-hydroxynapthaldehyde, 4-(diethylamino)-2-hydroxybenzaldehyde, and 3-ethoxy-4-hydroxybenzaldehyde, respectively. Three mononuclear oxovanadium(V) and two μoxo-bridged dinuclear molybdenum(VI) complexes have been synthesized using SALNP and SALSD. Besides, SALVN is used to prepare oxovanadium(V) and dioxomolybdenum(VI) complexes. All five metal complexes along with three amide-imine conjugates are characterized by single crystal XRD analysis. Some of them have been explored as catalyst for oxidation of alkyl benzene and styrene. Antitumor activities of the metal complexes along with ligands have been studied on Dalton lymphoma (DL) and 2PK3 murine lymphoma cells.
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Affiliation(s)
| | | | | | | | - Paula Brandão
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Vítor Félix
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193, Aveiro, Portugal
| | | | - Partha Pratim Manna
- Immunobiology Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221005, India
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47
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Buta CM, Radu MM, Mischie A, Zălaru CM, Ioniţă G, Ferbinteanu M. Experimental and computational characterization of structural and spectroscopic features of mixed ligand copper complexes-prototypes for square-pyramidal stereochemistry. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.06.046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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48
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Gogoi A, Das A, Frontera A, Verma AK, Bhattacharyya MK. Energetically significant unconventional π-π contacts involving fumarate in a novel coordination polymer of Zn(II): In-vitro anticancer evaluation and theoretical studies. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.04.047] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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49
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Ta S, Ghosh M, Ghosh K, Brandão P, Félix V, Hira SK, Manna PP, Das D. Exploring Anticancer and (Bio)catalytic Activities of New Oxovanadium(V), Dioxomolybdenum(VI), and Copper(II) Complexes of Amide–Imine Conjugates. ACS APPLIED BIO MATERIALS 2019; 2:2802-2811. [DOI: 10.1021/acsabm.9b00226] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | | | | | - Paula Brandão
- Department of Chemistry, CICECO − Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Vítor Félix
- Department of Chemistry, CICECO − Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
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50
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Singh R, Ali A, Faizi MSH, Singh R, Iskenderov TS, Dege N. Dichlorido{ N, N, N′-trimethyl- N′-(1 H-pyrazol-1-yl-κ N
2)methyl]ethane-1,2-diamine-κ 2
N, N′}copper(II) methanol monosolvate. IUCRDATA 2019. [DOI: 10.1107/s2414314619006928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
In the title compound, [CuCl2(C9H18N4)]·CH3OH, the central CuII ion is coordinated by three N atoms from the pyrazole derivative ligand and two chloride co-ligands. The coordination geometry around the CuII ion is distorted trigonal–bipyramidal. In the crystal, the molecules are linked by C—H...O, C—H...Cl and O—H...Cl hydrogen bonds, forming a three-dimensional framework with the lattice solvent molecule.
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