1
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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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2
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Jeminejs A, Novosjolova I, Bizdēna Ē, Turks M. Nucleophile-nucleofuge duality of azide and arylthiolate groups in the synthesis of quinazoline and tetrazoloquinazoline derivatives. Org Biomol Chem 2021; 19:7706-7723. [PMID: 34524320 DOI: 10.1039/d1ob01315g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
5-Arylthio-tetrazolo[1,5-c]quinazolines (tautomers of 2-arylthio-4-azido-quinazolines) undergo facile nucleophilic aromatic substitution reactions with amines, alcohols and alkylthiols. This, combined with the recently reported arylsulfanyl group dance, provides straightforward access to 4-azido-2-N-, O-, S-substituted quinazolines and/or their tetrazolo tautomers from commercially available 2,4-dichloroquinazoline. The azidoazomethine-tetrazole tautomeric equilibrium and the electron-withdrawing character of the fused tetrazolo system plays a central role in the developed transformations. 5-Amino-substituted tetrazolo[1,5-c]quinazolines undergo media-controlled tautomeric equilibrium, which permits them to demonstrate the reactivity traditionally associated with the azido substituent. Furthermore, a method for 5-O-substitited tetrazolo[1,5-a]quinazolines from 2,4-diazidoquinazoline was developed during the structural elucidation of the substitution products. The developed methodology will facilitate medicinal chemistry investigations into quinazoline derivatives and the discovered fluorescent properties of some of the products (e.g., 4-(4-phenyl-1H-1,2,3-triazol-1-yl)-2-(4-methylpiperazin-1-yl)quinazoline: λem. = 461 nm, ΦDCM = 0.89) could serve as a starting point for their further applications in analytical and materials science.
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Affiliation(s)
- Andris Jeminejs
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena Str. 3, Riga, LV-1048, Latvia.
| | - Irina Novosjolova
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena Str. 3, Riga, LV-1048, Latvia.
| | - Ērika Bizdēna
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena Str. 3, Riga, LV-1048, Latvia.
| | - Māris Turks
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena Str. 3, Riga, LV-1048, Latvia.
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3
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Ahmed MN, Shabbir S, Batool B, Mahmood T, Rashid U, Yasin KA, Tahir MN, Cassará MLA, Gil DM. A New Insight into Non-covalent Interactions in 1,4-Disubstituted 1H-1,2,3-Triazole: Synthesis, X-ray structure, DFT calculations, in vitro Lipoxygenase Inhibition (LOX) and in silico Studies. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130283] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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4
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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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5
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Chaudhuri S, Carrick JD. Synthetic Access to Functionalized Dipolarophiles of Lewis Basic Complexant Scaffolds through Sonogashira Cross-Coupling. J Org Chem 2018; 83:10261-10271. [PMID: 30016113 DOI: 10.1021/acs.joc.8b01446] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Soft Lewis basic complexants that facilitate selective removal of discrete ions resident in spent nuclear fuel can decrease repository volume and radiotoxicity and are of significant interest. Optimization of chelation efficacy is predicated on modular access to synthons to rapidly evaluate structure-activity relationships. The following work highlights efficient access to functionalized synthons for use as potential dipolarophiles in subsequent cycloaddition processes via Sonogashira coupling of 3-(6-bromo-pyridin-2-yl)-[1,2,4]triazine scaffolds. The 41 examples explored during method development evaluated electrophile and nucleophile diversity affording the desired coupled products in 31-96% isolated yield. Method optimization, substrate scope, a scale-up reaction, and downstream product functionalization are reported herein.
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Affiliation(s)
- Sauradip Chaudhuri
- Department of Chemistry , Tennessee Technological University , 55 University Drive , Cookeville , Tennessee 38505-0001 , United States
| | - Jesse D Carrick
- Department of Chemistry , Tennessee Technological University , 55 University Drive , Cookeville , Tennessee 38505-0001 , United States
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6
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Wang X, Wang X, Wang X, Zhang J, Liu C, Hu Y. In‐situ
Generated and Premade 1‐Copper(I) Alkynes in Cycloadditions. CHEM REC 2017. [DOI: 10.1002/tcr.201700011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Xinyan Wang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of ChemistryTsinghua University Beijing 100084 P. R. China
| | - Xingyong Wang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of ChemistryTsinghua University Beijing 100084 P. R. China
| | - Xuesong Wang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of ChemistryTsinghua University Beijing 100084 P. R. China
| | - Jianlan Zhang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of ChemistryTsinghua University Beijing 100084 P. R. China
| | - Chulong Liu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of ChemistryTsinghua University Beijing 100084 P. R. China
| | - Yuefei Hu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of ChemistryTsinghua University Beijing 100084 P. R. China
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7
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Sharghi H, Aberi M, Shiri P. Highly reusable support‐free copper(II) complex of
para
‐hydroxy‐substituted salen: Novel, efficient and versatile catalyst for C─N bond forming reactions. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3761] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Hashem Sharghi
- Department of ChemistryShiraz University Shiraz 71454 Iran
| | - Mahdi Aberi
- Department of ChemistryShiraz University Shiraz 71454 Iran
| | - Pezhman Shiri
- Department of ChemistryShiraz University Shiraz 71454 Iran
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8
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Singh MS, Chowdhury S, Koley S. Advances of azide-alkyne cycloaddition-click chemistry over the recent decade. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.07.044] [Citation(s) in RCA: 133] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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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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10
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Wang C, Ikhlef D, Kahlal S, Saillard JY, Astruc D. Metal-catalyzed azide-alkyne “click” reactions: Mechanistic overview and recent trends. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.02.010] [Citation(s) in RCA: 219] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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11
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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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12
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Dai J, Li Z, Wang T, Bai R. A highly stable and versatile heterobifunctional fluoroalkylation reagent for preparation of fluorinated organic compounds. Org Biomol Chem 2016; 14:4382-6. [DOI: 10.1039/c6ob00637j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A highly stable heterobifunctional fluoroalkylation reagent, 1-azido-2-chloro-1,1,2-trifluoro-2-iodoethane (ACTI) has been prepared and investigated systematically.
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Affiliation(s)
- Jingwen Dai
- CAS Key Laboratory of Soft Matter Chemistry and Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Zili Li
- CAS Key Laboratory of Soft Matter Chemistry and Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Taisheng Wang
- CAS Key Laboratory of Soft Matter Chemistry and Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Ruke Bai
- CAS Key Laboratory of Soft Matter Chemistry and Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- People's Republic of China
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13
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Sklorz JAW, Müller C. Recent Developments in the Chemistry of 3H-1,2,3,4-Triazaphosphole Derivatives. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500976] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Gabano E, Ravera M, Tinello S, Osella D. Synthesis of PtIV-Biomolecule Conjugates through Click Chemistry. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201501066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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15
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Cheng M, Lu D, Ding YS, Jia QX. 2D Compound Constructed by Cu3Units with Mixed Azido and Tetrazole Double Bridges: Synthesis, Structure, and Theoretical Study on Magnetic Properties. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500223] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Sklorz JAW, Hoof S, Rades N, De Rycke N, Könczöl L, Szieberth D, Weber M, Wiecko J, Nyulászi L, Hissler M, Müller C. Pyridyl-Functionalised 3H-1,2,3,4-Triazaphospholes: Synthesis, Coordination Chemistry and Photophysical Properties of Low-Coordinate Phosphorus Compounds. Chemistry 2015; 21:11096-109. [DOI: 10.1002/chem.201500988] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Indexed: 11/06/2022]
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17
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Lo WKC, Huff GS, Cubanski JR, Kennedy ADW, McAdam CJ, McMorran DA, Gordon KC, Crowley JD. Comparison of inverse and regular 2-pyridyl-1,2,3-triazole "click" complexes: structures, stability, electrochemical, and photophysical properties. Inorg Chem 2015; 54:1572-87. [PMID: 25615621 DOI: 10.1021/ic502557w] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Two inverse 2-pyridyl-1,2,3-triazole "click" ligands, 2-(4-phenyl-1H-1,2,3-triazol-1-yl)pyridine and 2-(4-benzyl-1H-1,2,3-triazol-1-yl)pyridine, and their palladium(II), platinum(II), rhenium(I), and ruthenium(II) complexes have been synthesized in good to excellent yields. The properties of these inverse "click" complexes have been compared to the isomeric regular compounds using a variety of techniques. X-ray crystallographic analysis shows that the regular and inverse complexes are structurally very similar. However, the chemical and physical properties of the isomers are quite different. Ligand exchange studies and density functional theory (DFT) calculations indicate that metal complexes of the regular 2-(1-R-1H-1,2,3-triazol-4-yl)pyridine (R = phenyl, benzyl) ligands are more stable than those formed with the inverse 2-(4-R-1H-1,2,3-triazol-1-yl)pyridine (R = phenyl, benzyl) "click" chelators. Additionally, the bis-2,2'-bipyridine (bpy) ruthenium(II) complexes of the "click" chelators have been shown to have short excited state lifetimes, which in the inverse triazole case, resulted in ejection of the 2-pyridyl-1,2,3-triazole ligand from the complex. Under identical conditions, the isomeric regular 2-pyridyl-1,2,3-triazole ruthenium(II) bpy complexes are photochemically inert. The absorption spectra of the inverse rhenium(I) and platinum(II) complexes are red-shifted compared to the regular compounds. It is shown that conjugation between the substituent group R and triazolyl unit has a negligible effect on the photophysical properties of the complexes. The inverse rhenium(I) complexes have large Stokes shifts, long metal-to-ligand charge transfer (MLCT) excited state lifetimes, and respectable quantum yields which are relatively solvent insensitive.
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Affiliation(s)
- Warrick K C Lo
- Department of Chemistry, University of Otago , P.O. Box 56, Dunedin 9054, New Zealand
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18
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Cheng C, Bai X, Zhang X, Chen M, Huang Q, Hu Z, Tu Y. Facile synthesis of block copolymers from a cinnamate derivative by combination of AGET ATRP and click chemistry. Macromol Res 2014. [DOI: 10.1007/s13233-014-2180-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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19
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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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20
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Sun R, Wang H, Hu J, Zhao J, Zhang H. Pyridine-phosphinimine ligand-accelerated Cu(i)-catalyzed azide–alkyne cycloaddition for preparation of 1-(pyridin-2-yl)-1,2,3-triazole derivatives. Org Biomol Chem 2014; 12:5954-63. [DOI: 10.1039/c4ob01176g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Ahmed MN, Yasin KA, Tahir MN, Bibi A, Andleeb H. Ethyl 6-(4-cyclopropyl-1 H-1,2,3-triazol-1-yl)pyridine-3-carboxylate. Acta Crystallogr Sect E Struct Rep Online 2014; 70:o136. [PMID: 24764862 PMCID: PMC3998301 DOI: 10.1107/s1600536813034673] [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: 12/26/2013] [Accepted: 12/27/2013] [Indexed: 11/10/2022]
Abstract
In the title compound, C13H14N4O2, which has approximate mirror symmetry, the dihedral angles between the triazole ring and the cyclopropane and pyridine rings are 87.1 (2) and 7.60 (9)°, respectively. In the crystal, inversion dimers linked by pairs of both C—H⋯N and C—H⋯O interactions generate R22(6) and R22(18) loops, respectively. Further C—H⋯N interactions form R22(10) loops and link the dimers into [110] chains.
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22
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Wang B, Zhang J, Wang X, Liu N, Chen W, Hu Y. Tandem reaction of 1-copper(I) alkynes for the synthesis of 1,4,5-trisubstituted 5-chloro-1,2,3-triazoles. J Org Chem 2013; 78:10519-23. [PMID: 24032422 DOI: 10.1021/jo401629x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A novel tandem reaction of 1-copper(I) alkynes with azides (cycloaddition) and then NCS (electrophilic substitution) was developed as an efficient method for the synthesis of 1,4,5-trisubstituted 5-chloro-1,2,3-triazoles. The method offers a rare example that a tandem reaction of an organometallic substrate does not involve in the reactivity of the metal-carbon bond in the first step.
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Affiliation(s)
- Bo Wang
- Department of Chemistry, Tsinghua University , Beijing 100084, P. R. China
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23
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Synthesis, characterization, and biological studies of emissive rhenium–glutamine conjugates. J Biol Inorg Chem 2013; 18:831-44. [DOI: 10.1007/s00775-013-1023-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 07/03/2013] [Indexed: 12/23/2022]
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24
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Shestakova TS, Shenkarev ZO, Deev SL, Chupakhin ON, Khalymbadzha IA, Rusinov VL, Arseniev AS. Long-range 1H-15N J couplings providing a method for direct studies of the structure and azide-tetrazole equilibrium in a series of azido-1,2,4-triazines and azidopyrimidines. J Org Chem 2013; 78:6975-82. [PMID: 23751069 DOI: 10.1021/jo4008207] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The selectively (15)N labeled azido-1,2,4-triazine 2*A and azidopyrimidine 4*A were synthesized by treating hydrazinoazines with (15)N-labeled nitrous acid. The synthesized compounds were studied by (1)H, (13)C, and (15)N NMR spectroscopy in DMSO, TFA, and DMSO/TFA solutions, where the azide-tetrazole equilibrium could lead to the formation of two tetrazoles (T, T') and one azide (A) isomer for each compound. The incorporation of the (15)N label led to the appearance of long-range (1)H-(15)N coupling constants (J(HN)), which can be measured easily by using amplitude-modulated 1D (1)H spin-echo experiments with selective inversion of the (15)N nuclei. The observed J(HN) patterns enable the unambiguous determination of the mode of fusion between the azole and azine rings in the two groups of tetrazole isomers (2*T', 4*T' and 2*T, 4*T), even for minor isoforms with a low concentration in solution. However, the azide isomers (2*A and 4*A) are characterized by the absence of detectable J(HN) coupling. The analysis of the J(HN) couplings in (15)N-labeled compounds provides a simple and efficient method for direct NMR studies of the azide-tetrazole equilibrium in solution.
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25
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Pellow MA, Stack TDP, Chidsey CED. Squish and CuAAC: additive-free covalent monolayers of discrete molecules in seconds. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:5383-7. [PMID: 23551032 PMCID: PMC3683963 DOI: 10.1021/la400172w] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
A terminal alkyne is immobilized rapidly into a full monolayer by squishing a small volume of a solution of the alkyne between an azide-modified surface and a copper plate. The monolayer is covalently attached to the surface through a copper-catalyzed alkyne-azide cycloaddition (CuAAC) reaction, and the coverages of the immobilized electroactive alkyne species are quantified by cyclic voltammetry. A reaction time of less than 20 s is possible with no other reagents required. The procedure is effective under aerobic conditions using either an aqueous or aprotic organic solution of the alkyne (1-100 mM).
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Affiliation(s)
- Matthew A Pellow
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
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Wolff M, Munoz L, François A, Carrayon C, Seridi A, Saffon N, Picard C, Machura B, Benoist E. Tricarbonylrhenium complexes from 2-pyridyl-1,2,3-triazole ligands bearing a 4-substituted phenyl arm: a combined experimental and theoretical study. Dalton Trans 2013; 42:7019-31. [DOI: 10.1039/c3dt33071k] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Avila B, Roth A, Streets H, Dwyer DS, Kurth MJ. Triazolbenzo[d]thiazoles: efficient synthesis and biological evaluation as neuroprotective agents. Bioorg Med Chem Lett 2012; 22:5976-8. [PMID: 22892117 PMCID: PMC3432163 DOI: 10.1016/j.bmcl.2012.07.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 07/03/2012] [Accepted: 07/06/2012] [Indexed: 12/27/2022]
Abstract
A number of (1H-1,2,3-triazol-1-yl)benzo[d]thiazoles were synthesized utilizing a versatile Cu-catalyzed azide-alkyne click reaction (CuAAC) on tautomeric benzo[4,5]thiazolo[3,2-d]tetrazole (1) and 2-azidobenzo[d]thiazole (2) starting materials. Moreover, one of the resulting products of this investigation, triazolbenzo[d]thiazole 22, was found to possess significant neuroprotective activity in human neuroblastoma (SH-SY5Y) cells.
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Affiliation(s)
- Belem Avila
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
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