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Stackpole BJ, Fredericksen JM, Brasch NE. Exploring the potential of the vitamin B 12 derivative azidocobalamin to undergo Huisgen 1,3-dipolar azide-alkyne cycloaddition reactions. J Inorg Biochem 2024; 254:112504. [PMID: 38412777 DOI: 10.1016/j.jinorgbio.2024.112504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 02/08/2024] [Accepted: 02/09/2024] [Indexed: 02/29/2024]
Abstract
There is considerable interest in using the metalloprotein cofactor vitamin B12 as a vehicle to deliver drugs and diagnostic agents into mammalian or bacterial cells by exploiting the B12-specific active uptake pathways. Conjugation of the cargo via the β-axial site or the 5'-OH of the ribose of the nucleotide are the most desirable sites, to maximise intracellular uptake. Herein we show the potential of conjugation at the beta-azido ligand of the vitamin B12 derivative azidocobalamin via a click-type azide-alkyne 1,3-dipolar cycloaddition (Huisgen cycloaddition) reaction. Reacting azidocobalamin with dimethyl acetylenedicarboxylate at 40 °C results in essentially stoichiometric conversion of azidocobalamin to the corresponding triazolato complex. The stability of the complex as a function of pH and in the presence of cyanide were investigated. The complex is stable in pD 7.0 phosphate buffer for 24 h. The rate of beta-axial ligand substitution was found to be one order of magnitude slower for the triazolatocobalamin complex compared with azidocobalamin.
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Affiliation(s)
- Ben J Stackpole
- School of Science, Auckland University of Technology, Private Bag 92006, Auckland 1142, New Zealand; The Dodd-Walls Centre for Quantum and Photonic Technologies, Dunedin 9054, New Zealand; The Maurice Wilkins Centre for Molecular Biodiscovery, Private Bag 92019, Auckland 1142, New Zealand
| | - Jessica M Fredericksen
- School of Science, Auckland University of Technology, Private Bag 92006, Auckland 1142, New Zealand; The Dodd-Walls Centre for Quantum and Photonic Technologies, Dunedin 9054, New Zealand; The Maurice Wilkins Centre for Molecular Biodiscovery, Private Bag 92019, Auckland 1142, New Zealand
| | - Nicola E Brasch
- School of Science, Auckland University of Technology, Private Bag 92006, Auckland 1142, New Zealand; The Dodd-Walls Centre for Quantum and Photonic Technologies, Dunedin 9054, New Zealand; The Maurice Wilkins Centre for Molecular Biodiscovery, Private Bag 92019, Auckland 1142, New Zealand.
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2
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Mansour AM, Radacki K, Mostafa GAE, Ali EA, Shehab OR. Reactivity of azido terpyridine Pd(ii) and Pt(ii) complexes towards 4,4,4-trifluoro-2-butynoic acid: structural insight into the triazolato coordination mode. RSC Adv 2023; 13:34826-34835. [PMID: 38035227 PMCID: PMC10685405 DOI: 10.1039/d3ra06656h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 11/20/2023] [Indexed: 12/02/2023] Open
Abstract
The mono- and binuclear azido terpyridine square-planar complexes of ionic formulas, [Pd2(N3)2L]2+ and [Pt(N3)L]+ (L = 1,4-bis(2,2':6',2''-terpyridin-4'yl)benzene), underwent the catalyst-free [3 + 2] cycloaddition coupling with 4,4,4-trifluoro-2-butynoic acid at ambient temperature affording the corresponding triazolate complexes. A mixture of triazolate isomers was generated by these inorganic click reactions. An increase in the solubility of the compounds was achieved by replacing the azido ligand with a triazolato ligand. By calculating the vibrational modes and comparing the total electronic and zero-point energy values, the local minimum structures of the complexes and the nature of the predominant triazolate isomer were verified. The theoretical work was complemented with natural bond analysis to get an insight into the natural charge and electronic arrangement of the metal ion, the hybridization of M-L bonds and strength of M-N bonds.
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Affiliation(s)
- Ahmed M Mansour
- Department of Chemistry, United Arab Emirates University Al-Ain United Arab Emirates
| | - Krzysztof Radacki
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg Am Hubland D-97074 Würzburg Germany
| | - Gamal A E Mostafa
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University Riyadh 11451 Saudi Arabia
| | - Essam A Ali
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University Riyadh 11451 Saudi Arabia
| | - Ola R Shehab
- Department of Chemistry, Faculty of Science, Cairo University Gamma Street Giza 12613 Egypt
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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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Moreth D, Hörner G, Müller VVL, Geyer L, Schatzschneider U. Isostructural Series of Ni(II), Pd(II), Pt(II), and Au(III) Azido Complexes with a N^C^N Pincer Ligand to Elucidate Trends in the iClick Reaction Kinetics and Structural Parameters of the Triazolato Products. Inorg Chem 2023; 62:16000-16012. [PMID: 37728290 DOI: 10.1021/acs.inorgchem.3c02122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
An isoelectronic and isostructural series of cyclometalated azido complexes [M(N3)(dpb)] with M = Ni(II), Pd(II), Pt(II), and Au(III) based on the N^C^N pincer ligand 1,3-di(2-pyridyl)phenide (dpb) was characterized by X-ray diffraction analysis and investigated for reactivity in the iClick reaction with a wide range of internal and terminal alkynes by using 1H and 19F NMR spectroscopy. Reaction rate constants were found to increase with greater charge density in the order Ni(II) > Pd(II) > Pt(II) > Au(III). Terminal alkynes R-C≡C-R' with strongly electron-withdrawing groups R and R' exhibited faster kinetics than those with electron-donating substituents in the order CF3 > ketone > ester > H > phenyl ≫ amide, while R = CH3 resulted in complete loss of reactivity. Four symmetrical triazolato complexes [M(triazolatoCOOCH3,COOCH3)(dpb)] with M = Ni(II), Pd(II), Pt(II), and Au(III) as well as four nonsymmetrically substituted triazolato complexes [Pt(triazolatoR,R')(dpb)] originating from terminal and internal alkynes were shown by X-ray crystal structure analysis to exclusively feature N2-coordination of the five-membered ring ligand. However, the Pt(II) triazolato complexes exist as a mixture of N1- and N2-coordinated species in solution. Torsion angles between the mean planes of the N^C^N pincer and the triazolato ligand increase from a nearly coplanar to a perpendicular arrangement when going from Au(III)/Pt(II)/Pd(II) to Ni(II), while different substituents R and R' on the alkyne have no influence on the torsion angle and were rationalized by DFT calculations. Finally, a carbohydrate derivative obtained by glucuronic acid conjugation to methyl propiolate demonstrates the facile biofunctionalization of metal complexes via the iClick reaction.
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Affiliation(s)
- Dominik Moreth
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Gerald Hörner
- Anorganische Chemie IV, Universität Bayreuth, Universitätsstraße 30, D-95447 Bayreuth, Germany
| | - Victoria V L Müller
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Lucia Geyer
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Ulrich Schatzschneider
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
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5
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Mansour AM, Shehab OR. Triazolato Pd(II) and Pt(II) complexes of 2,6-bis(1-ethylbenzimidazol-2'-yl)pyridine formed via catalyst-free [3+2] click reactions. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2023.121379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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6
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Shen YH, Ghiviriga I, Abboud KA, Schanze KS, Veige AS. iClick synthesis of network metallopolymers. Dalton Trans 2022; 51:18520-18527. [PMID: 36444537 DOI: 10.1039/d2dt01624a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Described is an approach to preparing the first iClick network metallopolymers with porous properties. Treating digoldazido complex 2-AuN3 with trigoldacetylide 3-AuPPh3 or 3-AuPEt3, trialkyne 3-H, tetragoldacetylide 4-AuPPh3, or tetraalkyne 4-H in CH2Cl2 affords five iClick network metallopolymers 5-AuPPh3, 5-AuPEt3, 5-H, 6-AuPPh3, and 6-H. Confirmation of the iClick network metallopolymers comes from FTIR, 13C solid-state cross-coupling magic angle spinning (CPMAS) NMR spectroscopy, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and nitrogen and CO2 sorption analysis. Employing model complexes 7-AuPPh3, 7-AuPEt3, 7-H, 8-AuPPh3, and 8-H provides structural insights due to the insolubility of iClick network metallopolymers.
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Affiliation(s)
- Yu-Hsuan Shen
- University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, FL, 32611, USA.
| | - Ion Ghiviriga
- University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, FL, 32611, USA.
| | - Khalil A Abboud
- University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, FL, 32611, USA.
| | - Kirk S Schanze
- University of Texas at San Antonio, Department of Chemistry, One UTSA Circle, San Antonio, TX 78249, USA
| | - Adam S Veige
- University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, FL, 32611, USA.
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7
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Korenev VS, Abramov PA, Sokolov MN. Azide Coordination to Polyoxometalates: Synthesis of (Bu4N)4.3K0.7[PW11O39FeIIIN3]⋅2.5H2O. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622600897] [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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8
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Vala D, Vala RM, Patel HM. Versatile Synthetic Platform for 1,2,3-Triazole Chemistry. ACS OMEGA 2022; 7:36945-36987. [PMID: 36312377 PMCID: PMC9608397 DOI: 10.1021/acsomega.2c04883] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 09/30/2022] [Indexed: 05/31/2023]
Abstract
1,2,3-Triazole scaffolds are not obtained in nature, but they are still intensely investigated by synthetic chemists in various fields due to their excellent properties and green synthetic routes. This review will provide a library of all synthetic routes used in the past 21 years to synthesize 1,2,3-triazoles and their derivatives using various metal catalysts (such as Cu, Ni, Ru, Ir, Rh, Pd, Au, Ag, Zn, and Sm), organocatalysts, metal-free as well as solvent- and catalyst-free neat syntheses, along with their mechanistic cycles, recyclability studies, solvent systems, and reaction condition effects on regioselectivity. Constant developments indicate that 1,2,3-triazoles will help lead to future organic synthesis and are useful for creating molecular libraries of various functionalized 1,2,3-triazoles.
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9
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Vogler D, Schöner M, Kaifer E, Himmel H. Bistriazoles Connected Through a B−B Bridge, Synthesized by Highly Selective Dipolar Cycloaddition Reactions of a Diazido‐diborane(4). Chemistry 2022; 28:e202201389. [PMID: 35703332 PMCID: PMC9544427 DOI: 10.1002/chem.202201389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Indexed: 11/11/2022]
Abstract
In this work we report the first cycloaddition reactions between a diazido diborane(4) and terminal alkynes, providing unique access to bis‐1,2,3‐triazoles connected by a B−B bridge. The catalyst‐free reactions are highly selective, yielding exclusively the thermodynamically disfavored bis‐1,4‐triazoles. The reactions are enabled by the high thermal stability of the diazido‐diborane [B(hpp)(N3)]2 (hpp=1,3,4,6,7,8‐hexahydro‐2H‐pyrimido[1,2‐α]pyrimidinate). Due to the tetra‐coordinate boron atoms in this reagent, the reactions are tolerant with respect to the introduction of Lewis‐basic groups at the alkyne. The scope and limitations of the new reactions are discussed.
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Affiliation(s)
- Daniel Vogler
- Anorganisch-Chemisches Institut Ruprecht-Karls Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Maximilian Schöner
- Anorganisch-Chemisches Institut Ruprecht-Karls Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut Ruprecht-Karls Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Hans‐Jörg Himmel
- Anorganisch-Chemisches Institut Ruprecht-Karls Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
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10
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Roose TR, Verdoorn DS, Mampuys P, Ruijter E, Maes BUW, Orru RVA. Transition metal-catalysed carbene- and nitrene transfer to carbon monoxide and isocyanides. Chem Soc Rev 2022; 51:5842-5877. [PMID: 35748338 PMCID: PMC9580617 DOI: 10.1039/d1cs00305d] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Indexed: 11/21/2022]
Abstract
Transition metal-catalysed carbene- and nitrene transfer to the C1-building blocks carbon monoxide and isocyanides provides heteroallenes (i.e. ketenes, isocyanates, ketenimines and carbodiimides). These are versatile and reactive compounds allowing in situ transformation towards numerous functional groups and organic compounds, including heterocycles. Both one-pot and tandem processes have been developed providing valuable synthetic methods for the organic chemistry toolbox. This review discusses all known transition metal-catalysed carbene- and nitrene transfer reactions towards carbon monoxide and isocyanides and in situ transformation of the heteroallenes hereby obtained, with a special focus on the general mechanistic considerations.
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Affiliation(s)
- T R Roose
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS), Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands.
| | - D S Verdoorn
- Organic Chemistry, Aachen-Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, Urmonderbaan 22, 6167RD Geleen, The Netherlands.
- Organic Synthesis Division, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.
| | - P Mampuys
- Organic Synthesis Division, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.
| | - E Ruijter
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS), Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands.
| | - B U W Maes
- Organic Synthesis Division, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.
| | - R V A Orru
- Organic Chemistry, Aachen-Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, Urmonderbaan 22, 6167RD Geleen, The Netherlands.
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11
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Mansour AM, Radacki K, Shehab OR. Role of the ancillary ligand in determining the antimicrobial activity of Pd(II) complexes with N^N^N-tridentate Coligand. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Maity R, Sarkar B. Chemistry of Compounds Based on 1,2,3-Triazolylidene-Type Mesoionic Carbenes. JACS AU 2022; 2:22-57. [PMID: 35098220 PMCID: PMC8790748 DOI: 10.1021/jacsau.1c00338] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Indexed: 05/04/2023]
Abstract
Mesoionic carbenes (MICs) of the 1,2,3-triazolylidene type have established themselves as a popular class of compounds over the past decade. Primary reasons for this popularity are their modular synthesis and their strong donor properties. While such MICs have mostly been used in combination with transition metals, the past few years have also seen their utility together with main group elements. In this paper, we present an overview of the recent developments on this class of compounds that include, among others, (i) cationic and anionic MIC ligands, (ii) the donor/acceptor properties of these ligands with a focus on the several methods that are known for estimating such donor/acceptor properties, (iii) a detailed overview of 3d metal complexes and main group compounds with these MIC ligands, (iv) results on the redox and photophysical properties of compounds based on MIC ligands, and (v) an overview on electrocatalysis, redox-switchable catalysis, and small-molecule activation to highlight the applications of compounds based on MIC ligands in contemporary chemistry. By discussing several aspects from the synthetic, spectroscopic, and application point of view of these classes of compounds, we highlight the state of the art of compounds containing MICs and present a perspective for future research in this field.
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Affiliation(s)
- Ramananda Maity
- Dr.
R. Maity Department of Chemistry, University
of Calcutta, 92, A. P.
C. Road, Kolkata 700009, India
| | - Biprajit Sarkar
- Prof.
Dr. B. Sarkar Lehrstuhl für Anorganische Koordinationschemie,
Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
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13
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Chang CW, Lee CR, Lee GH, Lu KL. The straightforward synthesis of N-coordinated ruthenium 4-aryl-1,2,3-triazolato complexes by [3 + 2] cycloaddition reactions of a ruthenium azido complex with terminal phenylacetylenes and non-covalent aromatic interactions in structures. RSC Adv 2022; 12:24830-24838. [PMID: 36128372 PMCID: PMC9430631 DOI: 10.1039/d2ra04835c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 08/22/2022] [Indexed: 11/21/2022] Open
Abstract
The first example of synthesis of N-coordinated ruthenium 4-aryl-1,2,3-triazolato complexes by [3 + 2] cycloaddition reactions of a ruthenium azido complex with a series of terminal phenylacetylenes.
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Affiliation(s)
- Chao-Wan Chang
- Division of Preparatory Programs for Overseas Chinese Students, National Taiwan Normal University, Linkou, New Taipei City 24449, Taiwan
| | - Chi-Rung Lee
- Department of Applied Materials Science and Technology, Minghsin University of Science and Technology, Hsinchu 30401, Taiwan
| | - Gene-Hsiang Lee
- Instrumentation Center, National Taiwan University, Taipei 10617, Taiwan
| | - Kuang-Lieh Lu
- Department of Chemistry, Fu Jen Catholic University, New Taipei City 242, Taiwan
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15
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Shen YH, Esper AM, Ghiviriga I, Abboud KA, Schanze KS, Ehm C, Veige AS. SPAAC iClick: progress towards a bioorthogonal reaction in-corporating metal ions. Dalton Trans 2021; 50:12681-12691. [PMID: 34545891 DOI: 10.1039/d1dt02626g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Combining strain-promoted azide-alkyne cycloaddition (SPAAC) and inorganic click (iClick) reactivity provides access to metal 1,2,3-triazolates. Experimental and computational insights demonstrate that iClick reactivity of the tested metal azides (LM-N3, M = Au, W, Re, Ru and Pt) depends on the accessibility of the azide functionality rather than electronic effects imparted by the metal. SPAAC iClick reactivity with cyclooctyne is observed when the azide functionality is sterically unencumbered, e.g. [Au(N3)(PPh3)] (Au-N3), [W(η3-allyl)(N3)(bpy)(CO)2] (W-N3), and [Re(N3)(bpy)(CO)3] [bpy = 2,2'-bipyridine] (Re-N3). Increased steric bulk and/or preequilibria with high activation barriers prevent SPAAC iClick reactivity for the complexes [Ru(N3)(Tp)(PPh3)2] [Tp = tris(pyrazolyl)borate] (Ru-N3), [Pt(N3)(CH3)(PiPr3)2] [iPr = isopropyl] (Pt(II)-N3), and [Pt(N3)(CH3)3]4 ((PtN3)4). Based on these computational insights, the SPAAC iClick reactivity of [Pt(N3)(CH3)3(P(CH3)3)2] (Pt(IV)-N3) was successfully predicted.
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Affiliation(s)
- Yu-Hsuan Shen
- University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, FL, 32611, USA.
| | - Alec M Esper
- University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, FL, 32611, USA.
| | - Ion Ghiviriga
- University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, FL, 32611, USA.
| | - Khalil A Abboud
- University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, FL, 32611, USA.
| | - Kirk S Schanze
- University of Texas at San Antonio, Department of Chemistry, One UTSA Circle, San Antonio, TX 78249, USA
| | - Christian Ehm
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy.
| | - Adam S Veige
- University of Florida, Department of Chemistry, Center for Catalysis, P.O. Box 117200, Gainesville, FL, 32611, USA.
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16
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Mironova A, Gushchin A, Abramov P, Eltsov I, Ryadun A, Sokolov M. [Mo6I8]4+ complexes with tetrazolate ligands: [3+2] cycloaddition of aromatic nitriles to [Mo6I8(N3)6]2−. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Peng K, Moreth D, Schatzschneider U. C^N^N Coordination Accelerates the iClick Reaction of Square-Planar Palladium(II) and Platinum(II) Azido Complexes with Electron-Poor Alkynes and Enables Cycloaddition with Terminal Alkynes. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00293] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Kun Peng
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Dominik Moreth
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Ulrich Schatzschneider
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
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18
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Mansour AM, Radacki K, Shehab OR. Half-sandwich triazolato Rh(III) compound of pyridylbenzimidazole ligand with cell selective toxicity towards Cryptococcus neoformans. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121928] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Yao K, Bertran A, Morgan J, Greenhalgh C, Edkins K, Bowen AM, Farrer NJ. Solvent-Dependent Reactivity and Photochemistry of Dinuclear and Mononuclear Platinum(IV) Azido Triazaolato Complexes. Eur J Inorg Chem 2021; 2021:1397-1404. [PMID: 34248415 PMCID: PMC8251955 DOI: 10.1002/ejic.202100041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/23/2021] [Indexed: 11/07/2022]
Abstract
Reaction between the platinum(IV) azido complex trans,trans,trans-[Pt(py)2(N3)2(OH)2] (1) and 1,4-diphenyl-2-butyne-1,4-dione 2 in MeCN produces the intermediate peroxide-bridged dimeric platinum(IV) azido triazolato species (5), which has been characterised by X-ray crystallography. However, if the reaction between 1 and 2 is conducted in MeOH it results in decomposition. Over time in MeCN, dimer (5) converts into mononuclear complexes trans,trans,trans-[Pt(py)2(N3)(triazole)(OH)2] (3 a/3 b), which are in dynamic exchange. If resuspended in protic solvents (MeOH,H2O), 3 a/3 b undergo a slow (22 d) irreversible rearrangement to a cyclised platinum(IV) species 4 which contains a formally N,O-chelated ligand. Conversion of 3 a/3 b to 4 in d 4-MeOH can be accelerated (384x) by irradiation with visible light, although continued irradiation also produces N3 . and OH. radicals, and the [4-N3]+ species can be readily detected by ESI-MS. Solvent choice significantly effects both the cycloaddition reaction between 1 and 2, and the stability of the resultant complexes.
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Affiliation(s)
- Kezi Yao
- Chemistry Research LaboratoryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUnited Kingdom
| | - Arnau Bertran
- Centre for Advanced Electron Spin Resonance and Inorganic Chemistry Laboratory, Department of ChemistryUniversity of OxfordSouth Parks RoadOxfordOX1 3QRUnited Kingdom
| | - Jacques Morgan
- Chemistry Research LaboratoryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUnited Kingdom
| | - Charlotte Greenhalgh
- Chemistry Research LaboratoryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUnited Kingdom
| | - Katharina Edkins
- School of Health SciencesUniversity of ManchesterOxford RoadManchesterM13 9PLUnited Kingdom
| | - Alice M. Bowen
- Centre for Advanced Electron Spin Resonance and Inorganic Chemistry Laboratory, Department of ChemistryUniversity of OxfordSouth Parks RoadOxfordOX1 3QRUnited Kingdom
- The Department of Chemistry, Photon Science Institute and the National EPR Research FacilityUniversity of ManchesterOxford RoadManchesterM13 9PLUnited Kingdom
| | - Nicola J. Farrer
- Chemistry Research LaboratoryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUnited Kingdom
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20
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Doerksen RS, Hodík T, Hu G, Huynh NO, Shuler WG, Krische MJ. Ruthenium-Catalyzed Cycloadditions to Form Five-, Six-, and Seven-Membered Rings. Chem Rev 2021; 121:4045-4083. [PMID: 33576620 DOI: 10.1021/acs.chemrev.0c01133] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ruthenium-catalyzed cycloadditions to form five-, six-, and seven-membered rings are summarized, including applications in natural product total synthesis. Content is organized by ring size and reaction type. Coverage is limited to processes that involve formation of at least one C-C bond. Processes that are stoichiometric in ruthenium or exploit ruthenium as a Lewis acid (without intervention of organometallic intermediates), ring formations that occur through dehydrogenative condensation-reduction, σ-bond activation-initiated annulations that do not result in net reduction of bond multiplicity, and photochemically promoted ruthenium-catalyzed cycloadditions are not covered.
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Affiliation(s)
- Rosalie S Doerksen
- Department of Chemistry, University of Texas at Austin,, Welch Hall (A5300), 105 East 24th Street, Austin, Texas 78712, United States
| | - Tomáš Hodík
- Department of Chemistry, University of Texas at Austin,, Welch Hall (A5300), 105 East 24th Street, Austin, Texas 78712, United States
| | - Guanyu Hu
- Department of Chemistry, University of Texas at Austin,, Welch Hall (A5300), 105 East 24th Street, Austin, Texas 78712, United States
| | - Nancy O Huynh
- Department of Chemistry, University of Texas at Austin,, Welch Hall (A5300), 105 East 24th Street, Austin, Texas 78712, United States
| | - William G Shuler
- Department of Chemistry, University of Texas at Austin,, Welch Hall (A5300), 105 East 24th Street, Austin, Texas 78712, United States
| | - Michael J Krische
- Department of Chemistry, University of Texas at Austin,, Welch Hall (A5300), 105 East 24th Street, Austin, Texas 78712, United States
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21
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Hoyer C, Schwerk P, Suntrup L, Beerhues J, Nössler M, Albold U, Dernedde J, Tedin K, Sarkar B. Synthesis, Characterization, and Evaluation of Antibacterial Activity of Ferrocenyl‐1,2,3‐Triazoles, Triazolium Salts, and Triazolylidene Complexes of Gold(
i
) and Silver(
i
). Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Carolin Hoyer
- Institut für Chemie und Biochemie Freie Universität Berlin Fabeckstrasse 34–36 14195 Berlin Germany
| | - Peter Schwerk
- Institut für Mikrobiologie und Tierseuchen Freie Universität Berlin Robert-von-Ostertag-Str. 7–13 14163 Berlin Germany
| | - Lisa Suntrup
- Institut für Chemie und Biochemie Freie Universität Berlin Fabeckstrasse 34–36 14195 Berlin Germany
| | - Julia Beerhues
- Lehrstuhl für Anorganische Koordinationschemie Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Maite Nössler
- Institut für Chemie und Biochemie Freie Universität Berlin Fabeckstrasse 34–36 14195 Berlin Germany
| | - Uta Albold
- Institut für Chemie und Biochemie Freie Universität Berlin Fabeckstrasse 34–36 14195 Berlin Germany
| | - Jens Dernedde
- Institut für Laboratoriumsmedizin Klinische Chemie und Pathobiochemie Charité-Universitätsmedizin Berlin Corporate member of Freie Universität Berlin Humboldt-Universität zu Berlin, and Berlin Institute of Health Augustenburger Platz 1 13353 Berlin Germany
| | - Karsten Tedin
- Institut für Mikrobiologie und Tierseuchen Freie Universität Berlin Robert-von-Ostertag-Str. 7–13 14163 Berlin Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie Freie Universität Berlin Fabeckstrasse 34–36 14195 Berlin Germany
- Lehrstuhl für Anorganische Koordinationschemie Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
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22
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Mansour AM, Radacki K, Shehab OR. Role of the ancillary ligand in controlling the lysozyme affinity and electronic properties of terpyridine fac-Re(CO) 3 complexes. Dalton Trans 2021; 50:1197-1201. [PMID: 33475110 DOI: 10.1039/d0dt04140h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The lysozyme binding affinity and the electronic properties of [ReX(CO)3(terpy-κ2N1,N2)] (X = Br- and triazolateCOOCH2CH3,CF3) were reported. The triazolate complex was prepared in a [3 + 2] cycloaddition click reaction. The bromo compound reacted with lysozyme affording adducts with Re(CO)3+ fragments, while the triazolate compound persisted. A red shift of the MLCT band of the triazolate compound in progressively less polar solvents may be due to the negative solvatochromism.
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Affiliation(s)
- Ahmed M Mansour
- Department of Chemistry, Faculty of Science, Cairo University, Gamma Street, Giza, Cairo 12613, Egypt.
| | - Krzysztof Radacki
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Ola R Shehab
- Department of Chemistry, Faculty of Science, Cairo University, Gamma Street, Giza, Cairo 12613, Egypt.
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23
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Mansour AM, Radacki K. Terpyridine based ReX(CO)3 compounds (X = Br–, N3– and triazolate): Spectroscopic and DFT studies. Polyhedron 2021. [DOI: 10.1016/j.poly.2020.114954] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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24
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Mansour AM. Tricarbonyl triazolato Re( i) compounds of pyridylbenzimidazole ligands: spectroscopic and antimicrobial activity evaluation. RSC Adv 2021; 11:22715-22722. [PMID: 35480466 PMCID: PMC9034272 DOI: 10.1039/d1ra03063a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 06/18/2021] [Indexed: 11/21/2022] Open
Abstract
Catalyst-free [3+2] cycloaddition coupling between [Ren(N3)n(CO)3nL] (n = 1, L = 1-ethyl-2-(pyridin-2-yl)benzimidazole (L1) and n = 2, L = 1,1′-(hexane-1,6-diyl)bis[2-(pyridin-2-yl)-1H-benzimidazole] (L2)) and dimethyl acetylene dicarboxylate (DMAD) afforded mono- and binuclear triazolate complexes. Spectroscopic data presented unambiguous evidence for isomerization of the kinetically formed N(1) bound triazolate isomer into the N(2) analogue. The solvatochromism properties were assessed by UV/Vis spectroscopy with the aid of time dependent density functional theory calculations. The free ligands and their tricarbonyl triazolato Re(i) complexes were screened for their potential antimicrobial activity against different bacterial and fungal pathogens. The antimicrobial activity and solvatochromism properties of mono- and binuclear tricarbonyl triazolato Re(i) complexes of pyridylbenzimidazole, formed by catalyst-free [3+2] cycloaddition reaction, were examined.![]()
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Affiliation(s)
- Ahmed M. Mansour
- Department of Chemistry
- Faculty of Science
- Cairo University
- Cairo 12613
- Egypt
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25
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Spectroscopic and antimicrobial activity of photoactivatable tricarbonyl Mn(I) terpyridine compounds. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119806] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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26
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Peng K, Einsele R, Irmler P, Winter RF, Schatzschneider U. The iClick Reaction of a BODIPY Platinum(II) Azido Complex with Electron-Poor Alkynes Provides Triazolate Complexes with Good 1O2 Sensitization Efficiency. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00128] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kun Peng
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Richard Einsele
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Peter Irmler
- Fachbereich Chemie, Universität Konstanz, Universitätsstr. 10, 78457 Konstanz, Germany
| | - Rainer F. Winter
- Fachbereich Chemie, Universität Konstanz, Universitätsstr. 10, 78457 Konstanz, Germany
| | - Ulrich Schatzschneider
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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27
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Farrer NJ, Griffith DM. Exploiting azide-alkyne click chemistry in the synthesis, tracking and targeting of platinum anticancer complexes. Curr Opin Chem Biol 2020; 55:59-68. [PMID: 31945705 PMCID: PMC7254056 DOI: 10.1016/j.cbpa.2019.12.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 11/24/2019] [Accepted: 12/02/2019] [Indexed: 12/31/2022]
Abstract
Click chemistry is fundamentally important to medicinal chemistry and chemical biology. It represents a powerful and versatile tool, which can be exploited to develop novel Pt-based anticancer drugs and to better understand the biological effects of Pt-based anticancer drugs at a cellular level. Innovative azide-alkyne cycloaddition-based approaches are being used to functionalise Pt-based complexes with biomolecules to enhance tumour targeting. Valuable information in relation to the mechanisms of action and resistance of Pt-based drugs is also being revealed through click-based detection, isolation and tracking of Pt drug surrogates in biological and cellular environments. Although less well-explored, inorganic Pt-click reactions enable synthesis of novel (potentially multimetallic) Pt complexes and provide plausible routes to introduce functional groups and monitoring Pt-azido drug localisation.
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Affiliation(s)
- Nicola J Farrer
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Darren M Griffith
- Department of Chemistry, RCSI, 123 St. Stephens Green, Dublin 2, Ireland; SSPC, Synthesis and Solid State Pharmaceutical Centre, Ireland.
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28
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Mansour AM, Shehab OR, Radacki K. Role of Sulfonate Appendage in the Protein Binding Affinity of Half-Sandwich Ruthenium(II)(η6
-p
-Cym) Complexes. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.201901089] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Ahmed M. Mansour
- Chemistry Department; Faculty of Science; Cairo University; Gamma Street, Giza 12613 Cairo Egypt
| | - Ola R. Shehab
- Chemistry Department; Faculty of Science; Cairo University; Gamma Street, Giza 12613 Cairo Egypt
| | - Krzysztof Radacki
- Institut für Anorganische Chemie; Faculty of Science; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
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29
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Mironova AD, Mikhailov MA, Brylev KA, Gushchin AL, Sukhikh TS, Sokolov MN. Phosphorescent complexes of {Mo 6I 8} 4+ with triazolates: [2+3] cycloaddition of alkynes to [Mo 6I 8(N 3) 6] 2−. NEW J CHEM 2020. [DOI: 10.1039/d0nj04259e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
“Click” reaction of activated alkynes with [Mo6I8(N3)6]2− produces novel emissive triazolate complexes with the {Mo6I8}4+ cluster core.
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Affiliation(s)
- Alina D. Mironova
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of the Russian Academy of Sciences
- 630090 Novosibirsk
- Russian Federation
| | - Maksim A. Mikhailov
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of the Russian Academy of Sciences
- 630090 Novosibirsk
- Russian Federation
| | - Konstantin A. Brylev
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of the Russian Academy of Sciences
- 630090 Novosibirsk
- Russian Federation
- Novosibirsk State University
| | - Artem L. Gushchin
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of the Russian Academy of Sciences
- 630090 Novosibirsk
- Russian Federation
- Novosibirsk State University
| | - Taisiya S. Sukhikh
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of the Russian Academy of Sciences
- 630090 Novosibirsk
- Russian Federation
- Novosibirsk State University
| | - Maxim N. Sokolov
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of the Russian Academy of Sciences
- 630090 Novosibirsk
- Russian Federation
- Novosibirsk State University
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30
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Yao K, Bertran A, Howarth A, Goicoechea JM, Hare SM, Rees NH, Foroozandeh M, Bowen AM, Farrer NJ. A visible-light photoactivatable di-nuclear Pt IV triazolato azido complex. Chem Commun (Camb) 2019; 55:11287-11290. [PMID: 31475995 PMCID: PMC6984334 DOI: 10.1039/c9cc05310g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 07/30/2019] [Indexed: 12/14/2022]
Abstract
A novel PtIV triazolato azido complex [3]-[N1,N3] has been synthesised via a strain-promoted double-click reaction (SPDC) between a PtIV azido complex (1) and the Sondheimer diyne (2). Photoactivation of [3]-[N1,N3] with visible light (452 nm) in the presence of 5'-guanosine monophosphate (5'-GMP) produced both PtIV and PtII 5'-GMP species; EPR spectroscopy confirmed the production of both azidyl and hydroxyl radicals. Spin-trapping of photogenerated radicals - particularly hydroxyl radicals - was significantly reduced in the presence of 5'-GMP.
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Affiliation(s)
- Kezi Yao
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
; Tel: +44 (0)1865 285131
| | - Arnau Bertran
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
; Tel: +44 (0)1865 285131
| | - Alison Howarth
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
; Tel: +44 (0)1865 285131
| | - Jose M. Goicoechea
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
; Tel: +44 (0)1865 285131
| | - Samuel M. Hare
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
; Tel: +44 (0)1865 285131
| | - Nicholas H. Rees
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
; Tel: +44 (0)1865 285131
| | - Mohammadali Foroozandeh
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
; Tel: +44 (0)1865 285131
| | - Alice M. Bowen
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
; Tel: +44 (0)1865 285131
| | - Nicola J. Farrer
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
; Tel: +44 (0)1865 285131
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31
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Chen YX, Yang HH, Lin YL, Hou JK, Chu YJ, Liu FC, Lee GH. [3 + 2] cycloaddition of azido-bridged molybdenum(ii) complex with nitriles and alkynes. Dalton Trans 2019; 48:12996-13005. [PMID: 31397830 DOI: 10.1039/c9dt02659b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The azido-bridged molybdenum complex [N(CH3)4][(μ1,1-N3)3{Mo(η3-C3H5)(CO)2}2], 1, was synthesized and its reactions with unsaturated nitriles and alkynes were investigated. The isolated [3 + 2] cycloaddition products were the N(2), N(3) bound tetrazolate complexes [N(CH3)4][(μ1,1-N3)2(μ-N4C{R}-κ2N2:N3){Mo(η3-C3H5)(CO)2}2] (R = C(CN)C(CN)2 (2), C6H4NO2, (3)) and [N(CH3)4][(μ-N4C{R}-κ2N2:N3)2(μ1,1-N3){Mo(η3-C3H5)(CO)2}2] (R = C(CN)C(CN)2 (4), C6H4NO2 (5)), and the N(1), N(2) bound triazolate complexes [N(CH3)4][(μ-N3C2{R}2-κ2N1:N2)(μ1,1-N3)2{Mo(η3-C3H5)(CO)2}2] (R = CO2CH3 (6) and R = CO2CH2CH3 (7). The reactivity of these cycloaddition reactions could be determined by the electronic properties of both metal azide and dipolarophile. In the reaction of 1 with nitriles, at most two bridging azido groups can participate in the cycloaddition reactions and elevated temperature is required for the preparations of 3 and 5. In the case of alkynes, only one azido group is active for the reaction. These complexes are fluxional in solution, and isomers were found in 3 and 5. The molecular structures of the above complexes were determined by single-crystal X-ray diffraction analysis, which reveals a distorted octahedral geometry around each molybdenum atom, and the two metal atoms are connected through three bridging ligands. The formation of these heterocycles demonstrated the [3 + 2] cycloaddition reaction could also be applied to the less electron-rich azido-bridged molybdenum complex.
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Affiliation(s)
- You-Xuan Chen
- Department of Chemistry, National Dong Hwa University, Hualien 974, Taiwan, Republic of China.
| | - Hsueh-Hui Yang
- Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Foundation, Hualien, 970, Taiwan, Republic of China
| | - Yu-Liang Lin
- Department of Chemistry, National Dong Hwa University, Hualien 974, Taiwan, Republic of China.
| | - Ji-Kuan Hou
- Department of Chemistry, National Dong Hwa University, Hualien 974, Taiwan, Republic of China.
| | - Yong-Jui Chu
- Department of Chemistry, National Dong Hwa University, Hualien 974, Taiwan, Republic of China.
| | - Fu-Chen Liu
- Department of Chemistry, National Dong Hwa University, Hualien 974, Taiwan, Republic of China.
| | - Gene-Hsiang Lee
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan, Republic of China
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32
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Chang CW, Lee GH. Synthesis of 1,4,5-trisubstituted triazoles by [3+2] cycloaddition of a ruthenium azido complex with ynoate esters. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.06.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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33
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Kumar R, Ujjval R, Thirupathi N. Half Sandwich Electron Deficient
N
,
N′
,
N′′
‐Triarylguanidinatoruthenium(II) Complexes: Syntheses, Reactivity Studies, and Structural Aspects. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900616] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Robin Kumar
- Department of Chemistry University of Delhi Delhi 110 007 India
| | - Rishabh Ujjval
- Department of Chemistry University of Delhi Delhi 110 007 India
| | | |
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34
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Chang CW, Cheng MC, Lee GH, Peng SM. Facile synthesis of 1,5-disubstituted tetrazoles by reacting a ruthenium acetylide complex with trimethylsilyl azide. Dalton Trans 2019; 48:11732-11742. [PMID: 31298242 DOI: 10.1039/c9dt02363a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Treatment of [Ru]-C[triple bond, length as m-dash]CPh (1, [Ru] = (η5-C5H5)(dppe)Ru, dppe = Ph2PCH2CH2PPh2) with trimethylsilyl azide afforded the cationic nitrile complex {[Ru]NCCH2Ph}[N3] (2) and the further cycloaddition of 2 with trimethylsilyl azide at 60 °C afforded the N(2)-bound tetrazolato complex [Ru]N4CCH2Ph (3). The regiospecific alkylation of 3 gave a series of cationic N(2)-bound N(4)-alkylated-5-benzyl tetrazolato complexes {[Ru]N4(CH2R)CCH2Ph}[Br] (4a, R = C6F5; 4b, R = Ph; 4c, R = 4-CN-C6H4; 4d, R = 2,6-F2-C6H3; 4e, R = 6-CH2Br-C5NH3) and the subsequent cleavage of the Ru-N bond of 4a-4e gave N(1)-alkylated-5-benzyl tetrazoles N4(CH2R)CCH2Ph (5a-5e) in good to excellent yields and [Ru]-Br, which, on reacting with phenylacetylene, resulted in the formation of 1 thus forming a reaction cycle. The structures of 2, 3, 4a, 4c and 5a were confirmed by single-crystal X-ray diffraction analysis.
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Affiliation(s)
- Chao-Wan Chang
- Division of Preparatory Programs for Overseas Chinese Students, National Taiwan Normal University, New Taipei City 24449, Linkou, Taiwan.
| | - Ming-Chuan Cheng
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan and Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Gene-Hsiang Lee
- Instrumentation Center, National Taiwan University, Taipei 10617, Taiwan
| | - Shie-Ming Peng
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan and Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan
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35
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Peng K, Mawamba V, Schulz E, Löhr M, Hagemann C, Schatzschneider U. iClick Reactions of Square-Planar Palladium(II) and Platinum(II) Azido Complexes with Electron-Poor Alkynes: Metal-Dependent Preference for N1 vs N2 Triazolate Coordination and Kinetic Studies with 1H and 19F NMR Spectroscopy. Inorg Chem 2019; 58:11508-11521. [PMID: 31393709 DOI: 10.1021/acs.inorgchem.9b01304] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Two square-planar palladium(II) and platinum(II) azido complexes [M(N3)(L)] with L = N-phenyl-2-[1-(2-pyridinyl)ethylidene]hydrazine carbothioamide reacted with four different electron-poor alkynes R-C≡C-R' with R = R' = COOCH3, COOEt, COOCH2CH2OCH3 or R = CF3, R' = COOEt in a [3 + 2] cycloaddition "iClick" reaction. The resulting triazolate complexes [M(triazolateR,R')(L)] were isolated by simple precipitation and/or washing in high purity and good yield. Six out of the eight new compounds feature the triazolate ligand coordinated to the metal center via the N2 nitrogen atom, but fortuitous solubility properties allowed isolation of the N1 isomer in two cases from acetone. When the solvent was changed to DMSO, the N1 → N2 isomerization could be studied by NMR spectroscopy and took several days to complete. 19F NMR studies of the iClick reaction with F3C-C≡C-COOEt led to identification of a putative early linear intermediate in addition to the N1 and N2 isomers, however with the latter as the final product. Rate constants determined by 1H or 19F NMR spectroscopy increased in the order Pd > Pt and CF3/COOEt > COOR/COOR with R = CH3, Et, CH2CH2OCH3. The second-order rate constant k2 > 3.7 M-1 s-1 determined for the reaction of [Pd(N3)(L)] with F3C-C≡C-COOEt is the fastest observed for an iClick reaction so far and compares favorably with that of the most evolved strained alkynes reported for the SPAAC (strain-promoted azide-alkyne cycloaddition) to date. Selected title compounds were evaluated for their anticancer activity on the GaMG human glioblastoma brain cancer cell line and gave EC50 values in the low micromolar range (2-16 μM). The potency of the Pd(II) complexes increased with the chain length of the substituents in the 4- and 5-positions of the triazolate ligand.
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Affiliation(s)
- Kun Peng
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , D-97074 Würzburg , Germany
| | - Viviane Mawamba
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , D-97074 Würzburg , Germany
| | - Ellina Schulz
- Universitätsklinikum Würzburg , Neurochirurgische Klinik und Poliklinik, Tumorbiologisches Labor , Josef-Schneider-Straße 11 , D-97080 Würzburg , Germany
| | - Mario Löhr
- Universitätsklinikum Würzburg , Neurochirurgische Klinik und Poliklinik, Tumorbiologisches Labor , Josef-Schneider-Straße 11 , D-97080 Würzburg , Germany
| | - Carsten Hagemann
- Universitätsklinikum Würzburg , Neurochirurgische Klinik und Poliklinik, Tumorbiologisches Labor , Josef-Schneider-Straße 11 , D-97080 Würzburg , Germany
| | - Ulrich Schatzschneider
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , D-97074 Würzburg , Germany
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36
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Synthesis of ruthenium triazolato complexes by the [3 + 2] cycloaddition of a ruthenium azido complex with acetylacetylenes. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.05.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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37
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Bläsing K, Bresien J, Labbow R, Michalik D, Schulz A, Thomas M, Villinger A. Boran‐Addukte von Stickstoffwasserstoffsäure und Organischen Aziden: Intermediate bei der Bildung von Aminoboranen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902226] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kevin Bläsing
- Anorganische ChemieInstitut für ChemieUniversität Rostock A.-Einstein-Str. 3a 18059 Rostock Deutschland
| | - Jonas Bresien
- Anorganische ChemieInstitut für ChemieUniversität Rostock A.-Einstein-Str. 3a 18059 Rostock Deutschland
| | - René Labbow
- Anorganische ChemieInstitut für ChemieUniversität Rostock A.-Einstein-Str. 3a 18059 Rostock Deutschland
| | - Dirk Michalik
- Anorganische ChemieInstitut für ChemieUniversität Rostock A.-Einstein-Str. 3a 18059 Rostock Deutschland
- MaterialdesignLeibniz-Institut für Katalyse an der Universität, Rostock A.-Einstein-Str. 29a 18059 Rostock Deutschland
| | - Axel Schulz
- Anorganische ChemieInstitut für ChemieUniversität Rostock A.-Einstein-Str. 3a 18059 Rostock Deutschland
- MaterialdesignLeibniz-Institut für Katalyse an der Universität, Rostock A.-Einstein-Str. 29a 18059 Rostock Deutschland
| | - Max Thomas
- Anorganische ChemieInstitut für ChemieUniversität Rostock A.-Einstein-Str. 3a 18059 Rostock Deutschland
| | - Alexander Villinger
- Anorganische ChemieInstitut für ChemieUniversität Rostock A.-Einstein-Str. 3a 18059 Rostock Deutschland
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38
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Bläsing K, Bresien J, Labbow R, Michalik D, Schulz A, Thomas M, Villinger A. Borane Adducts of Hydrazoic Acid and Organic Azides: Intermediates for the Formation of Aminoboranes. Angew Chem Int Ed Engl 2019; 58:6540-6544. [PMID: 30888089 DOI: 10.1002/anie.201902226] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Indexed: 12/16/2022]
Abstract
The reaction of HN3 with the strong Lewis acid B(C6 F5 )3 led to the formation of a very labile HN3 ⋅B(C6 F5 )3 adduct, which decomposed to an aminoborane, H(C6 F5 )NB(C6 F5 )2 , above -20 °C with release of molecular nitrogen and simultaneous migration of a C6 F5 group from boron to the nitrogen atom. The intermediary formation of azide-borane adducts with B(C6 F5 )3 was also demonstrated for a series of organic azides, RN3 (R=Me3 Si, Ph, 3,5-(CF3 )2 C6 H3 ), which also underwent Staudinger-like decomposition along with C6 F5 group migration. In accord with experiment, computations revealed rather small barriers towards nitrogen release for these highly labile azide adducts for all organic substituents except R=Me3 Si (m.p. 120 °C, Tdec =189 °C). Hydrolysis of the aminoboranes provided C6 F5 -substituted amines, HN(R)(C6 F5 ), in good yields.
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Affiliation(s)
- Kevin Bläsing
- Anorganische Chemie, Institut für Chemie, Universität Rostock, A.-Einstein-Str. 3a, 18059, Rostock, Germany
| | - Jonas Bresien
- Anorganische Chemie, Institut für Chemie, Universität Rostock, A.-Einstein-Str. 3a, 18059, Rostock, Germany
| | - René Labbow
- Anorganische Chemie, Institut für Chemie, Universität Rostock, A.-Einstein-Str. 3a, 18059, Rostock, Germany
| | - Dirk Michalik
- Anorganische Chemie, Institut für Chemie, Universität Rostock, A.-Einstein-Str. 3a, 18059, Rostock, Germany.,Materialdesign, Leibniz-Institut für Katalyse an der Universität Rostock, A.-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Axel Schulz
- Anorganische Chemie, Institut für Chemie, Universität Rostock, A.-Einstein-Str. 3a, 18059, Rostock, Germany.,Materialdesign, Leibniz-Institut für Katalyse an der Universität Rostock, A.-Einstein-Str. 29a, 18059, Rostock, Germany
| | - Max Thomas
- Anorganische Chemie, Institut für Chemie, Universität Rostock, A.-Einstein-Str. 3a, 18059, Rostock, Germany
| | - Alexander Villinger
- Anorganische Chemie, Institut für Chemie, Universität Rostock, A.-Einstein-Str. 3a, 18059, Rostock, Germany
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39
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Zhao XZ, Tsuji K, Hymel D, Burke TR. Development of Highly Selective 1,2,3-Triazole-containing Peptidic Polo-like Kinase 1 Polo-box Domain-binding Inhibitors. Molecules 2019; 24:E1488. [PMID: 31014020 PMCID: PMC6515314 DOI: 10.3390/molecules24081488] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 04/12/2019] [Accepted: 04/14/2019] [Indexed: 01/02/2023] Open
Abstract
Members of the polo-like kinase (Plk) family of serine/threonine protein kinases play crucial roles in cell cycle regulation and proliferation. Of the five Plks (Plk1-5), Plk1 is recognized as an anticancer drug target. Plk1 contains multiple structural components that are important for its proper biological function. These include an N-terminal catalytic domain and a C-terminal non-catalytic polo-box domain (PBD). The PBD binds to phosphothreonine (pT) and phosphoserine-containing sequences. Blocking PBD-dependent interactions offers a potential means of down-regulating Plk1 function that is distinct from targeting its ATP-binding site. Previously, we demonstrated by tethering alkylphenyl chains from the N(π)-position of the His residue in the 5-mer PLHSpT, that we were able to access a hydrophobic "cryptic" binding pocket on the surface of the PBD, and in so doing enhance binding affinities by approximately 1000-fold. More recently, we optimized these PBD-ligand interactions using an oxime ligation-based strategy. Herein, using azide-alkyne cycloaddition reactions, we explore new triazole-containing PBD-binding antagonists. Some of these ligands retain the high PBD-binding affinity of the parent peptide, while showing desirable enhanced selectivity for the PBD of Plk1 relative to the PBDs of Plk2 and Plk3.
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Affiliation(s)
- Xue Zhi Zhao
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA.
| | - Kohei Tsuji
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA.
| | - David Hymel
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA.
| | - Terrence R Burke
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA.
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40
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Sánchez-Sordo I, Díez J, Lastra E, Gamasa MP. Synthesis of Iridium Tetrazolato, Triazolinato, and Triazolato Complexes by [3+2] Cycloaddition of Iridium(III) Azido Complexes with Unsaturated Nitriles. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Irene Sánchez-Sordo
- Departamento de Química Orgánica e Inorgánica-IUQOEM (Unidad Asociada al CSIC), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Oviedo, 33006 Oviedo, Principado de Asturias, Spain
| | - Josefina Díez
- Departamento de Química Orgánica e Inorgánica-IUQOEM (Unidad Asociada al CSIC), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Oviedo, 33006 Oviedo, Principado de Asturias, Spain
| | - Elena Lastra
- Departamento de Química Orgánica e Inorgánica-IUQOEM (Unidad Asociada al CSIC), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Oviedo, 33006 Oviedo, Principado de Asturias, Spain
| | - M. Pilar Gamasa
- Departamento de Química Orgánica e Inorgánica-IUQOEM (Unidad Asociada al CSIC), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Oviedo, 33006 Oviedo, Principado de Asturias, Spain
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41
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Yao K, Bertran A, Morgan J, Hare SM, Rees NH, Kenwright AM, Edkins K, Bowen AM, Farrer NJ. A novel Pt(iv) mono azido mono triazolato complex evolves azidyl radicals following irradiation with visible light. Dalton Trans 2019; 48:6416-6420. [PMID: 31012460 PMCID: PMC6984332 DOI: 10.1039/c9dt01156k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A novel PtIV azido triazolato complex exists as an equilibrium between two species in d3-MeCN and evolves azide radicals (but not hydroxide radicals) when irradiated with visible light.
The platinum(iv) azido complex trans,trans,trans-[PtIV(N3)2(OH)2(py)2] (1) undergoes cycloaddition with 1,4-diphenyl-2-butyne-1,4-dione (2) under mild, catalyst-free conditions, affording a number of mono and bis click products. The major mono click product (3) exists in MeCN as an equilibrium mixture between two species; 3a and 3b rapidly interconvert through nucleophilic attack of the axial Pt–OH group at the adjacent Ph–CO group. The kinetic and thermodynamic parameters for this interconversion have been measured by selective saturation-transfer NMR spectroscopic experiments and are consistent with cyclisation at the Pt centre. Complex 3b was also characterised by X-ray crystallography. Visible light irradiation (440–480 nm) of 3 in d3-MeCN produces azidyl radicals (N3˙), as demonstrated by EPR spin-trapping with DMPO; no generation of hydroxyl radicals was observed. 1H–195Pt HMBC NMR confirmed that the photoproducts were PtIV rather than PtII species, and HPLC was consistent with these being [3–N3]+ species; no facile photoejection of the triazolato ligand was observed, consistent with MS/MS fragmentation of 3. When 3 was irradiated in the presence of 5′-GMP, no 5′-GMP photoproducts were observed, suggesting that complex 3 is likely to exhibit significantly simplified biological activity (release of azidyl radicals but not DNA binding) compared with complex 1.
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Affiliation(s)
- Kezi Yao
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK.
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42
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Kelly JT, Ellington TL, Sexton TM, Fortenberry RC, Tschumper GS, Asmis KR. Communication: Gas phase vibrational spectroscopy of the azide-water complex. J Chem Phys 2018; 149:191101. [DOI: 10.1063/1.5053671] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- John T. Kelly
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universitat Leipzig, Linnéstraße 2, D-04103 Leipzig, Germany
| | - Thomas L. Ellington
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677-1848, USA
| | - Thomas More Sexton
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677-1848, USA
| | - Ryan C. Fortenberry
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677-1848, USA
- Department of Chemistry and Biochemistry, Georgia Southern University, Statesboro, Georgia 30460, USA
| | - Gregory S. Tschumper
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677-1848, USA
| | - Knut R. Asmis
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universitat Leipzig, Linnéstraße 2, D-04103 Leipzig, Germany
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43
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Farrer NJ, Sharma G, Sayers R, Shaili E, Sadler PJ. Platinum(iv) azido complexes undergo copper-free click reactions with alkynes. Dalton Trans 2018; 47:10553-10560. [PMID: 29480314 PMCID: PMC6083821 DOI: 10.1039/c7dt04183g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 01/05/2018] [Indexed: 01/09/2023]
Abstract
We report our investigations into the first examples of copper-free 1,3-dipolar cycloaddition (click) reactions of electrophiles with a PtIV azido complex. The Pt-IV azido complex trans, trans, trans-[PtIV(py)2(N3)2(OH)2] (1) was reactive towards dimethyl acetylenedicarboxylate (DMAD) (2), diethyl acetylenedicarboxylate DEACD (3), N-[(1R,8S,9s)-bicyclo[6.1.0]non-4-yn-9-ylmethyloxycarbonyl]-1,8-diamino-3,6-dioxaoctane (BCN) (11) and dibenzocyclooctyne-amine (DBCO) (12) resulting in formation of the corresponding mono (a) and bis-substituted (b) complexes. Complexes of 2 undergo further reactions between the Pt centre and the carbonyl group to form 2a' and 2b'. This is not seen for the products of the corresponding PtII azido complex trans-[Pt(py)2(N3)2] with acetylene 2. Novel complexes 2a', 2b', 11a and 11b have been characterised by multinuclear NMR, IR and UV-vis spectroscopy and ESI-MS. These reactions represent new synthetic routes to novel Pt(iv) complexes.
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Affiliation(s)
- Nicola J. Farrer
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
; Tel: +44 (0)1865 285155
| | - Gitanjali Sharma
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
; Tel: +44 (0)1865 285155
| | - Rachel Sayers
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
; Tel: +44 (0)1865 285155
| | - Evyenia Shaili
- Department of Chemistry
, University of Warwick
,
Gibbet Hill Road
, Coventry
, CV4 7AL
, UK
| | - Peter J. Sadler
- Department of Chemistry
, University of Warwick
,
Gibbet Hill Road
, Coventry
, CV4 7AL
, UK
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44
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Huxley MT, Burgun A, Ghodrati H, Coghlan CJ, Lemieux A, Champness NR, Huang DM, Doonan CJ, Sumby CJ. Protecting-Group-Free Site-Selective Reactions in a Metal-Organic Framework Reaction Vessel. J Am Chem Soc 2018; 140:6416-6425. [PMID: 29699391 DOI: 10.1021/jacs.8b02896] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Site-selective organic transformations are commonly required in the synthesis of complex molecules. By employing a bespoke metal-organic framework (MOF, 1·[Mn(CO)3N3]), in which coordinated azide anions are precisely positioned within 1D channels, we present a strategy for the site-selective transformation of dialkynes into alkyne-functionalized triazoles. As an illustration of this approach, 1,7-octadiyne-3,6-dione stoichiometrically furnishes the mono-"click" product N-methyl-4-hex-5'-ynl-1',4'-dione-1,2,3-triazole with only trace bis-triazole side-product. Stepwise insights into conversions of the MOF reaction vessel were obtained by X-ray crystallography, demonstrating that the reactive sites are "isolated" from one another. Single-crystal to single-crystal transformations of the Mn(I)-metalated material 1·[Mn(CO)3(H2O)]Br to the corresponding azide species 1·[Mn(CO)3N3] with sodium azide, followed by a series of [3+2] azide-alkyne cycloaddition reactions, are reported. The final liberation of the "click" products from the porous material is achieved by N-alkylation with MeBr, which regenerates starting MOF 1·[Mn(CO)3(H2O)]Br and releases the organic products, as characterized by NMR spectroscopy and mass spectrometry. Once the dialkyne length exceeds the azide separation, site selectivity is lost, confirming the critical importance of isolated azide moieties for this strategy. We postulate that carefully designed MOFs can act as physical protecting groups to facilitate other site-selective and chemoselective transformations.
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Affiliation(s)
- Michael T Huxley
- Department of Chemistry and Centre for Advanced Nanomaterials , The University of Adelaide , Adelaide , South Australia 5005 , Australia
| | - Alexandre Burgun
- Department of Chemistry and Centre for Advanced Nanomaterials , The University of Adelaide , Adelaide , South Australia 5005 , Australia
| | - Hanieh Ghodrati
- Department of Chemistry and Centre for Advanced Nanomaterials , The University of Adelaide , Adelaide , South Australia 5005 , Australia
| | - Campbell J Coghlan
- Department of Chemistry and Centre for Advanced Nanomaterials , The University of Adelaide , Adelaide , South Australia 5005 , Australia
| | - Anthony Lemieux
- Department of Chemistry and Centre for Advanced Nanomaterials , The University of Adelaide , Adelaide , South Australia 5005 , Australia
| | - Neil R Champness
- School of Chemistry , University of Nottingham , Nottingham NG7 2RD , United Kingdom
| | - David M Huang
- Department of Chemistry and Centre for Advanced Nanomaterials , The University of Adelaide , Adelaide , South Australia 5005 , Australia
| | - Christian J Doonan
- Department of Chemistry and Centre for Advanced Nanomaterials , The University of Adelaide , Adelaide , South Australia 5005 , Australia
| | - Christopher J Sumby
- Department of Chemistry and Centre for Advanced Nanomaterials , The University of Adelaide , Adelaide , South Australia 5005 , Australia
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45
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Schmid P, Maier M, Pfeiffer H, Belz A, Henry L, Friedrich A, Schönfeld F, Edkins K, Schatzschneider U. Catalyst-free room-temperature iClick reaction of molybdenum(ii) and tungsten(ii) azide complexes with electron-poor alkynes: structural preferences and kinetic studies. Dalton Trans 2018; 46:13386-13396. [PMID: 28933494 DOI: 10.1039/c7dt03096g] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Two isostructural and isoelectronic group VI azide complexes of the general formula [M(η3-allyl)(N3)(bpy)(CO)2] with M = Mo, W and bpy = 2,2'-bipyridine were prepared and fully characterized, including X-ray structure analysis. Both reacted smoothly with electron-poor alkynes such as dimethyl acetylenedicarboxylate (DMAD) and 4,4,4-trifluoro-2-butynoic acid ethyl ester in a catalyst-free room-temperature iClick [3 + 2] cycloaddition reaction. Reaction with phenyl(trifluoromethyl)acetylene, on the other hand, did not lead to any product formation. X-ray structures of the four triazolate complexes isolated showed the monodentate ligand to be N2-coordinated in all cases, which requires a 1,2-shift of the nitrogen from the terminal azide to the triazolate cycloaddition product. On the other hand, a 19F NMR spectroscopic study of the reaction of the fluorinated alkyne with the tungsten azide complex at 27 °C allowed detection of the N1-coordinated intermediate. With this method, the second-order rate constant was determined as (7.3 ± 0.1) × 10-2 M-1 s-1, which compares favorably with that of first-generation compounds such as difluorocyclooctyne (DIFO) used in the strain-promoted azide-alkyne cycloaddition (SPAAC). In contrast, the reaction of the molybdenum analogue was too fast to be studied with NMR methods. Alternatively, solution IR studies revealed pseudo-first order rate constants of 0.4 to 6.5 × 10-3 s-1, which increased in the order of Mo > W and F3C-C[triple bond, length as m-dash]C-COOEt > DMAD.
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Affiliation(s)
- Paul Schmid
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany.
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46
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Campbell R, Konar S, Hunter S, Pulham C, Portius P. Labile Low-Valent Tin Azides: Syntheses, Structural Characterization, and Thermal Properties. Inorg Chem 2018; 57:400-411. [PMID: 29244498 DOI: 10.1021/acs.inorgchem.7b02621] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first two examples of the class of tetracoordinate low-valent, mixed-ligand tin azido complexes, Sn(N3)2(L)2, are shown to form upon reaction of SnCl2 with NaN3 and SnF2 with Me3SiN3 in either pyridine or 4-picoline (2, L = py; 3, L = pic). These adducts of Sn(N3)2 are shock- and friction-insensitive and stable at r.t. under an atmosphere of pyridine or picoline, respectively. A new, fast, and efficient method for the preparation of Sn(N3)2 (1) directly from SnF2, and by the stepwise de-coordination of py from 2 at r.t., is reported that yields 1 in microcrystalline form, permitting powder X-ray diffraction studies. Reaction of 1 with a nonbulky cationic H-bond donor forms the salt-like compound {C(NH2)3}Sn(N3)3 (4) which is comparably stable despite its high nitrogen content (55%) and the absence of bulky weakly coordinating cations that are conventionally deemed essential in related systems of homoleptic azido metallates. The spectroscopic and crystallographic characterization of the polyazides 1-4 provides insight into azide-based H-bonded networks and unravels the previously unknown structure of 1 as an important lighter binary azide homologue of Pb(N3)2. The atomic coordinates for 1 and 2-4 were derived from powder and single crystal XRD data, respectively; those for 1 are consistent with predictions made by DFT-D calculations under periodic boundary conditions.
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Affiliation(s)
- Rory Campbell
- Department of Chemistry, University of Sheffield , Brook Hill, Sheffield, S3 7HF, U.K
| | - Sumit Konar
- EaStCHEM School of Chemistry, University of Edinburgh , David Brewster Rd., Edinburgh, EH9 3FJ, U.K
| | - Steven Hunter
- EaStCHEM School of Chemistry, University of Edinburgh , David Brewster Rd., Edinburgh, EH9 3FJ, U.K
| | - Colin Pulham
- EaStCHEM School of Chemistry, University of Edinburgh , David Brewster Rd., Edinburgh, EH9 3FJ, U.K
| | - Peter Portius
- Department of Chemistry, University of Sheffield , Brook Hill, Sheffield, S3 7HF, U.K
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47
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Kumar R, Kishan R, Thomas JM, Chinnappan S, Thirupathi N. Probing the factors that influence the conformation of a guanidinato ligand in [(η5-C5Me5)M(NN)X] (NN = chelating N,N′,N′′-tri(o-substituted aryl)guanidinate(1−); X = chloro, azido and triazolato). NEW J CHEM 2018. [DOI: 10.1039/c7nj03766j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The conformational difference illustrated is ascribed to a subtle repulsive interaction between the o-Cl substituent of two proximal aryl rings in the guanidinate ligand.
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Affiliation(s)
- Robin Kumar
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
| | - Ram Kishan
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
| | - Jisha Mary Thomas
- Catalysis and Energy Laboratory
- Department of Chemistry
- Pondicherry University (A Central University)
- Puducherry 605014
- India
| | - Sivasankar Chinnappan
- Catalysis and Energy Laboratory
- Department of Chemistry
- Pondicherry University (A Central University)
- Puducherry 605014
- India
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48
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Mansour AM, Friedrich A. IClick cycloaddition reaction of light-triggered manganese(i) carbonyl complexes. NEW J CHEM 2018. [DOI: 10.1039/c8nj01838c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
For a binuclear blue-light-induced CO-releasing manganese(i) tricarbonyl complex bearing bidentate ligand, the effect of the ancillary ligand on the dark stability and photolysis process was studied.
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Affiliation(s)
- Ahmed M. Mansour
- Department of Chemistry
- Faculty of Science
- Cairo University
- Cairo 12613
- Egypt
| | - Alexandra Friedrich
- Institut für Anorganische Chemie
- Julius-Maximilians-Universität Würzburg
- D-97074 Würzburg
- Germany
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49
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Krest A, Nitsche S, Arefyeva N, Grzesiak I, Werker M, Ruschewitz U, Klein A. Tetraorganopnictonium and Alkali Metal Salts of Pyridine‐2,6‐di‐tetrazolate. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Alexander Krest
- Department für Chemie Institut für Anorganische Chemie Universität zu Köln Greinstraße 6 50939 Köln Germany
| | - Sara Nitsche
- Department für Chemie Institut für Anorganische Chemie Universität zu Köln Greinstraße 6 50939 Köln Germany
| | - Natalia Arefyeva
- Department für Chemie Institut für Anorganische Chemie Universität zu Köln Greinstraße 6 50939 Köln Germany
| | - Ireneus Grzesiak
- Department für Chemie Institut für Anorganische Chemie Universität zu Köln Greinstraße 6 50939 Köln Germany
| | - Melanie Werker
- Department für Chemie Institut für Anorganische Chemie Universität zu Köln Greinstraße 6 50939 Köln Germany
| | - Uwe Ruschewitz
- Department für Chemie Institut für Anorganische Chemie Universität zu Köln Greinstraße 6 50939 Köln Germany
| | - Axel Klein
- Department für Chemie Institut für Anorganische Chemie Universität zu Köln Greinstraße 6 50939 Köln Germany
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50
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Quadri CC, Lalrempuia R, Hessevik J, Törnroos KW, Le Roux E. Structural Characterization of Tridentate N-Heterocyclic Carbene Titanium(IV) Benzyloxide, Silyloxide, Acetate, and Azide Complexes and Assessment of Their Efficacies for Catalyzing the Copolymerization of Cyclohexene Oxide with CO2. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00705] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Coralie C. Quadri
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007, Bergen, Norway
| | - Ralte Lalrempuia
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007, Bergen, Norway
| | - Julie Hessevik
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007, Bergen, Norway
| | - Karl W. Törnroos
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007, Bergen, Norway
| | - Erwan Le Roux
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007, Bergen, Norway
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