1
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de Kler N, Pereverzev AY, Roithová J. Terminal Copper Nitrenoid Formation and Reactivity Induced by Absorption to an Antenna Ligand. Angew Chem Int Ed Engl 2024; 63:e202319270. [PMID: 38314650 DOI: 10.1002/anie.202319270] [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: 12/13/2023] [Revised: 01/22/2024] [Accepted: 02/05/2024] [Indexed: 02/06/2024]
Abstract
Copper nitrenoids are key intermediates in copper-catalyzed direct C-H amination reactions. Further development of this important reaction relies on knowing the properties and reactivity of the nitrenoid intermediates. This work utilizes antenna ligands to form copper nitrenoid complexes and monitor the consecutive C-H amination reactions under well-defined single-molecule conditions in the gas phase. The [Cu(Lphoto)(Lazide)]+ precursors (Lphoto is a bidentate antenna ligand, and Lazide is an organic azide) were stored in an ion trap at 3.5 K and irradiated by visible light, which resulted in denitrogenation of the complex. Further irradiation of the copper nitrenoid led to the consecutive C-H amination of the antenna ligand. The nitrenoid complexes, as well as the products of the C-H amination, were characterized by helium tagging IRPD spectroscopy, and the mechanism was described by DFT calculations. This research demonstrates that the antenna ligands can be used to promote the denitrogenation of metal azides in the gas phase and also channel the internal energy to promote further reactivity, which opens a new way to study the reactivity of highly reactive species under well-defined conditions.
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Affiliation(s)
- Noël de Kler
- Department of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Aleksandr Y Pereverzev
- Department of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Jana Roithová
- Department of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
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2
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Post-Functionalization of Organometallic Complexes via Click-Reaction. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27196494. [PMID: 36235030 PMCID: PMC9614606 DOI: 10.3390/molecules27196494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/21/2022] [Accepted: 09/26/2022] [Indexed: 11/09/2022]
Abstract
CuAAC (Cu catalyzed azide-alkyne cycloaddition) click-reaction is a simple and powerful method for the post-synthetic modification of organometallic complexes of transition metals. This approach allows the selective introduction of additional donor sites or functional groups to the periphery of the ligand environment. This is especially important if a metalloligand with free donor sites, which are of the same nature as the primary site for the coordination of the primary metal, has to be created. The concept of post-synthetic modification of organometallic complexes by click-reaction is relatively recent and the currently available experimental material does not yet allow us to identify trends and formulate recommendations to address specific problems. In the present study, we have applied the CuAAC reaction for the post-synthetic modification of diimine mononuclear complexes Re(I), Pt(II) and Ir(III) with C≡C bonds at the periphery of the ligand environment and demonstrated that click-chemistry is a powerful tool for the tunable chemical post-synthetic modification of coordination compounds.
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3
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Gulledge ZZ, Duda DP, Dixon DA, Carrick JD. Microwave-Assisted, Metal- and Azide-Free Synthesis of Functionalized Heteroaryl-1,2,3-triazoles via Oxidative Cyclization of N-Tosylhydrazones and Anilines. J Org Chem 2022; 87:12632-12643. [PMID: 36126149 DOI: 10.1021/acs.joc.2c01042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
As the search for competent soft-Lewis basic complexants for separations continues to evolve toward identification of a chemoselective moiety for speciation of the minor actinides from the electronically similar lanthanides, synthetic methods must congruently evolve. Synthetic options to convergently construct unsymmetric heteroaryl donor complexants incorporating a 1,2,3-triazole from accessible starting materials for evaluation in separation assays necessitated the development of the described methodology. In this report, metal- and azide-free synthesis of diversely functionalized pyridyl-1,2,3-triazole derivatives facilitated by microwave irradiation was leveraged to prepare a novel class of tridentate ligands. The described work negates the incorporation of thermally sensitive and toxic organoazides by using N-tosylhydrazones and anilines as viable synthetic equivalents in an efficient 12 min reaction time. Adaptation to alternative synthons useful for drug discovery was also realized. Method discovery, optimization, N-tosylhydrazone and aniline substrate scope, as well as a preliminary mechanistic hypotheses supported by DFT calculations are reported herein.
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Affiliation(s)
- Zachary Z Gulledge
- Department of Chemistry, Tennessee Technological University, Cookeville, Tennessee 38505-0001, United States
| | - Damian P Duda
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - David A Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Jesse D Carrick
- Department of Chemistry, Tennessee Technological University, Cookeville, Tennessee 38505-0001, United States
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4
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Kancharla SK, Birudaraju S, Pal A, Krishnakanth Reddy L, Reddy ER, Vagolu SK, Sriram D, Bonige KB, Korupolu RB. Synthesis and biological evaluation of isatin oxime ether-tethered aryl 1 H-1,2,3-triazoles as inhibitors of Mycobacterium tuberculosis. NEW J CHEM 2022. [DOI: 10.1039/d1nj05171g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A series of isatin oxime ether-tethered aryl 1H-1,2,3-triazole hybrids were synthesized and screened for their in vitro antitubercular activity against the M. tuberculosis H37Rv strain.
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Affiliation(s)
- Sampath Kumar Kancharla
- Aragen Life Sciences (Formerly GVK Bioscience), Nacharam, Hyderabad, Telangana State-500076, India
- Department of Engineering Chemistry, Andhra University, Visakhapatnam, Andhra Pradesh-530003, India
| | - Saritha Birudaraju
- Aragen Life Sciences (Formerly GVK Bioscience), Nacharam, Hyderabad, Telangana State-500076, India
| | - Arani Pal
- Aragen Life Sciences (Formerly GVK Bioscience), Nacharam, Hyderabad, Telangana State-500076, India
| | - L. Krishnakanth Reddy
- Aragen Life Sciences (Formerly GVK Bioscience), Nacharam, Hyderabad, Telangana State-500076, India
| | - Eda Rami Reddy
- Department of Chemistry, Indian Institute of Technology, Indore, 453552, India
| | - Siva Krishna Vagolu
- Medicinal Chemistry & Antimycobacterial Research Laboratory, Pharmacy Group, Birla Institute of Technology and Science-Pilani, Hyderabad Campus, Telangana State-500078, India
| | - Dharmarajan Sriram
- Medicinal Chemistry & Antimycobacterial Research Laboratory, Pharmacy Group, Birla Institute of Technology and Science-Pilani, Hyderabad Campus, Telangana State-500078, India
| | - Kishore Babu Bonige
- Department of Engineering Chemistry, Andhra University, Visakhapatnam, Andhra Pradesh-530003, India
| | - Raghu Babu Korupolu
- Department of Engineering Chemistry, Andhra University, Visakhapatnam, Andhra Pradesh-530003, India
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5
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Qami AE, Jismy B, El Hakmaoui A, Akssira M, Abarbri M. Cu/Pd‐Catalyzed One‐Pot Synthesis of 2‐(1,2,3‐Triazolyl)methyl‐3‐alkynylImidazo[1,2‐
a
]pyridines Involving Sequential SN Reaction/[3+2] Cycloaddition/Sonogashira Coupling Reactions. ChemistrySelect 2021. [DOI: 10.1002/slct.202102228] [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]
Affiliation(s)
- Abdelkarim El Qami
- Department of chemistry Université de Tours. Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E) EA 6299 Avenue Monge, Faculté des Sciences, Parc de Grandmont 37200 Tours France
- Department of chemistry Université Hassan II de Casablanca Laboratoire de Chimie Physique et de Chimie Bioorganique, URAC 22 BP Casablanca, 146 28800 Mohammedia Morocco
| | - Badr Jismy
- Department of chemistry Université de Tours. Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E) EA 6299 Avenue Monge, Faculté des Sciences, Parc de Grandmont 37200 Tours France
| | - Ahmed El Hakmaoui
- Department of chemistry Université Hassan II de Casablanca Laboratoire de Chimie Physique et de Chimie Bioorganique, URAC 22 BP Casablanca, 146 28800 Mohammedia Morocco
| | - Mohamed Akssira
- Department of chemistry Université Hassan II de Casablanca Laboratoire de Chimie Physique et de Chimie Bioorganique, URAC 22 BP Casablanca, 146 28800 Mohammedia Morocco
| | - Mohamed Abarbri
- Department of chemistry Université de Tours. Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E) EA 6299 Avenue Monge, Faculté des Sciences, Parc de Grandmont 37200 Tours France
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6
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Khatua H, Das SK, Roy S, Chattopadhyay B. Dual Reactivity of 1,2,3,4‐Tetrazole: Manganese‐Catalyzed Click Reaction and Denitrogenative Annulation. Angew Chem Int Ed Engl 2020; 60:304-312. [DOI: 10.1002/anie.202009078] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/01/2020] [Indexed: 12/20/2022]
Affiliation(s)
- Hillol Khatua
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Sandip Kumar Das
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Satyajit Roy
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
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7
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Khatua H, Das SK, Roy S, Chattopadhyay B. Dual Reactivity of 1,2,3,4‐Tetrazole: Manganese‐Catalyzed Click Reaction and Denitrogenative Annulation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009078] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Hillol Khatua
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Sandip Kumar Das
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Satyajit Roy
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
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8
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Affiliation(s)
- Tara K. K. Dickie
- Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive, Lethbridge, Alberta, Canada T1K 3M4
| | - Ashraf A. Aborawi
- Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive, Lethbridge, Alberta, Canada T1K 3M4
| | - Paul G. Hayes
- Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive, Lethbridge, Alberta, Canada T1K 3M4
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9
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A decade of advances in the reaction of nitrogen sources and alkynes for the synthesis of triazoles. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213217] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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10
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Kawtharani R, Cherry K, Elmasri M, Abarbri M. An Easy Access to 4‐Trifluoromethylated 7‐(4‐Substitued‐1
H
‐1,2,3‐Triazol‐1‐yl)Pyrimido[1,2‐
b
]Pyridazin‐2‐One Systems. ChemistrySelect 2019. [DOI: 10.1002/slct.201902375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Ranin Kawtharani
- Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E). EA 6299. Avenue Monge Faculté des Sciences, Parc de Grandmont 37200 Tours France
- Laboratoire de Chimie Médicinale et de Produit Naturels (LCMPN)Université Libanaise, Faculté des Sciences I Hadat Lebanon
| | - Khalil Cherry
- Laboratoire Matériaux, Catalyse, Environnement et Méthodes Analytiques (MCEMA)Université Libanaise, Faculté des Sciences I, Hadat Lebanon
| | - Mirvat Elmasri
- Laboratoire de Chimie Médicinale et de Produit Naturels (LCMPN)Université Libanaise, Faculté des Sciences I Hadat Lebanon
| | - Mohamed Abarbri
- Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E). EA 6299. Avenue Monge Faculté des Sciences, Parc de Grandmont 37200 Tours France
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11
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Lauridsen PJ, Lu Z, Celaje JJA, Kedzie EA, Williams TJ. Conformational twisting of a formate-bridged diiridium complex enables catalytic formic acid dehydrogenation. Dalton Trans 2018; 47:13559-13564. [PMID: 30206593 PMCID: PMC6168401 DOI: 10.1039/c8dt03268h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We previously reported that iridium complex 1a enables the first homogeneous catalytic dehydrogenation of neat formic acid and enjoys unusual stability through millions of turnovers. Binuclear iridium hydride species 5a, which features a provocative C2-symmetric geometry, was isolated from the reaction as a catalyst resting state. By synthesizing and carefully examining the catalytic initiation of a series of analogues to 1a, we establish here a strong correlation between the formation of C2-twisted iridium dimers analogous to 5a and the reactivity of formic acid dehydrogenation: an efficient C2 twist appears unique to 1a and essential to catalytic reactivity.
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Affiliation(s)
- Paul J Lauridsen
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, 837 Bloom Walk, Los Angeles, CA 90089-1661, USA.
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12
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Copper(II) coordination chain complex with the 2,5-bis(2-pyridyl)-1,3,4-thiadiazole ligand and an asymmetric μ2-1,1-azido double-bridged: Synthesis, crystal structure and magnetic properties. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.07.053] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Valderas C, Marzo L, de la Torre MC, García Ruano JL, Alemán J, Casarrubios L, Sierra MA. Mono- and Bimetallic Alkynyl Metallocenes and Half-Sandwich Complexes: A Simple and Versatile Synthetic Approach. Chemistry 2016; 22:15645-15649. [DOI: 10.1002/chem.201603462] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 08/09/2016] [Indexed: 01/09/2023]
Affiliation(s)
- Carolina Valderas
- Departamento de Química Orgánica; Facultad de Ciencias Químicas; Universidad Complutense; 28040 Madrid Spain
- Centro de Innovación en Química Avanzada (ORFEO-CINQA); Spain
- Instituto de Química Orgánica General; Consejo Superior de Investigaciones Científicas (CSIC), Juan de la Cierva 3; 28006 Madrid Spain
| | - Leyre Marzo
- Organic Chemistry Department; Universidad Autónoma de Madrid; 28049 Madrid Spain
| | - María C. de la Torre
- Centro de Innovación en Química Avanzada (ORFEO-CINQA); Spain
- Instituto de Química Orgánica General; Consejo Superior de Investigaciones Científicas (CSIC), Juan de la Cierva 3; 28006 Madrid Spain
| | | | - José Alemán
- Organic Chemistry Department; Universidad Autónoma de Madrid; 28049 Madrid Spain
| | - Luis Casarrubios
- Departamento de Química Orgánica; Facultad de Ciencias Químicas; Universidad Complutense; 28040 Madrid Spain
- Centro de Innovación en Química Avanzada (ORFEO-CINQA); Spain
| | - Miguel A. Sierra
- Departamento de Química Orgánica; Facultad de Ciencias Químicas; Universidad Complutense; 28040 Madrid Spain
- Centro de Innovación en Química Avanzada (ORFEO-CINQA); Spain
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14
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Thomann A, Zapp J, Hutter M, Empting M, Hartmann RW. Steering the azido-tetrazole equilibrium of 4-azidopyrimidines via substituent variation - implications for drug design and azide-alkyne cycloadditions. Org Biomol Chem 2016; 13:10620-30. [PMID: 26340222 DOI: 10.1039/c5ob01006c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
This paper focuses on an interesting constitutional isomerism called azido-tetrazole equilibrium which is observed in azido-substituted N-heterocycles. We present a systematic investigation of substituent effects on the isomer ratio within a 2-substituted 4-azidopyrimidine model scaffold. NMR- and IR-spectroscopy as well as X-ray crystallography were employed for thorough analysis and characterization of synthesized derivatives. On the basis of this data, we demonstrate the possibility to steer this valence tautomerism towards the isomer of choice by means of substituent variation. We show that the tetrazole form can act as an efficient disguise for the corresponding azido group masking its well known reactivity in azide-alkyne cycloadditions (ACCs). In copper(I)-catalyzed AAC reactions, substituent-stabilized tetrazoles displayed a highly decreased or even abolished reactivity whereas azides and compounds in the equilibrium were directly converted. By use of an acid sensitive derivative, we provide, to our knowledge, the first experimental basis for a possible exploitation of this dynamic isomerism as a pH-dependent azide-protecting motif for selective SPAAC conjugations in aqueous media. Finally, we demonstrate the applicability and efficiency of stabilized tetrazolo[1,5-c]pyrimidines for Fragment-Based Drug Design (FBDD) in the field of quorum sensing inhibitors.
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Affiliation(s)
- A Thomann
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Department for Drug Design and Optimization (DDOP), Campus C2.3, 66123 Saarbrücken, Germany.
| | - J Zapp
- Saarland University, Department of Pharmaceutical Biology, Campus C2.2, 66123 Saarbrücken, Germany
| | - M Hutter
- Saarland University, Center for Bioinformatics, Campus E2.1, 66123 Saarbrücken, Germany
| | - M Empting
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Department for Drug Design and Optimization (DDOP), Campus C2.3, 66123 Saarbrücken, Germany.
| | - R W Hartmann
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Department for Drug Design and Optimization (DDOP), Campus C2.3, 66123 Saarbrücken, Germany. and Saarland University, Department for Pharmaceutical and Medicinal Chemistry, Campus C2.3, 66123 Saarbrücken, Germany
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15
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McCarney EP, Hawes CS, Blasco S, Gunnlaugsson T. Synthesis and structural studies of 1,4-di(2-pyridyl)-1,2,3-triazole dpt and its transition metal complexes; a versatile and subtly unsymmetric ligand. Dalton Trans 2016; 45:10209-21. [DOI: 10.1039/c6dt01416j] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Structural analysis of the 1,4-di(2-pyridyl)-1,2,3-triazole ligand and its transition metal complexes of varying lability demonstrate the coordination chemistry selectivity of this subtly unsymmetric ligand.
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Affiliation(s)
- Eoin P. McCarney
- School of Chemistry and Trinity Biomedical Sciences Institute (TBSI)
- Trinity College Dublin
- The University of Dublin
- Dublin 2
- Ireland
| | - Chris S. Hawes
- School of Chemistry and Trinity Biomedical Sciences Institute (TBSI)
- Trinity College Dublin
- The University of Dublin
- Dublin 2
- Ireland
| | - Salvador Blasco
- School of Chemistry and Trinity Biomedical Sciences Institute (TBSI)
- Trinity College Dublin
- The University of Dublin
- Dublin 2
- Ireland
| | - Thorfinnur Gunnlaugsson
- School of Chemistry and Trinity Biomedical Sciences Institute (TBSI)
- Trinity College Dublin
- The University of Dublin
- Dublin 2
- Ireland
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16
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Harisha MB, Nagaraj M, Muthusubramanian S, Bhuvanesh N. Base free regioselective synthesis of α-triazolylazine derivatives. RSC Adv 2016. [DOI: 10.1039/c6ra10452e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A regioselective α-heteroarylation followed by deoxygenation towards the synthesis of variety of azine triazole from simple azine N-oxides derivatives and N-tosyl-1,2,3-triazoles has been described.
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Affiliation(s)
- Mysore Bhyrappa Harisha
- Department of Organic Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai – 625 021
- India
| | - Muthupandi Nagaraj
- Department of Organic Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai – 625 021
- India
| | | | - Nattamai Bhuvanesh
- X-ray Diffraction Laboratory
- Department of Chemistry
- Texas A & M University
- College Station
- USA
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17
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Bolje A, Urankar D, Košmrlj J. Synthesis and NMR Analysis of 1,4-Disubstituted 1,2,3-Triazoles Tethered to Pyridine, Pyrimidine, and Pyrazine Rings. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403100] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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