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Karak P, Sreelakshmi PA, Chakraborty B, Pal M, Khatua B, Lal Koner A, Choudhury J. Annulation-Induced Hidden Reactivity of the 1,2,4-Triazole Backbone. Angew Chem Int Ed Engl 2023; 62:e202310603. [PMID: 37610555 DOI: 10.1002/anie.202310603] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/18/2023] [Accepted: 08/23/2023] [Indexed: 08/24/2023]
Abstract
Triazoles are an important class of compounds with widespread applications. Functionalization of the triazole backbone is thus of significant interest. In comparison to 1,2,3-triazoles, C-H activation-functionalization of the congeners 1,2,4-triazoles is surprisingly underdeveloped. Indeed, no such C-H activation-functionalization has been reported for 4-substituted 1,2,4-triazole cores. Furthermore, although denitrogenative ring-opening of 1,2,3-triazoles is well-explored, 1,2,4-triazole/triazolium substrates have not been known to exhibit N-N bond-cleaving ring-opening reactivity so far. In this work, we unveiled an unusual hidden reactivity of the 1,2,4-triazole backbone involving the elusive N-N bond-cleaving ring-opening reaction. This new reactivity was induced by a Satoh-Miura-type C-H activation-annulation at the 1,2,4-triazole motif appended with a pyridine directing group. This unique reaction allowed ready access to a novel class of unsymmetrically substituted 2,2'-dipyridylamines, with one pyridine ring fully-substituted with alkyl groups. The unsymmetrical 2,2'-dipyridylamines were utilized to access unsymmetrical boron-aza-dipyridylmethene fluorescent dyes. Empowered with desirable optical/physical properties such as large Stokes shifts and suitable hydrophobicity arising from optimal alkyl chain length at the fully-substituted pyridine-ring, these dyes were used for intracellular lipid droplet-selective imaging studies, which provided useful information toward designing suitable lipid droplet-selective imaging probes for biomedical applications.
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Affiliation(s)
- Pirudhan Karak
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, 462 066, India
| | - P A Sreelakshmi
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, 462 066, India
| | - Barsha Chakraborty
- Bionanotechnology Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, 462 066, India
| | - Manisha Pal
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, 462 066, India
| | - Bitasik Khatua
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, 462 066, India
| | - Apurba Lal Koner
- Bionanotechnology Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, 462 066, India
| | - Joyanta Choudhury
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, 462 066, India
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Synthesis and photobiological evaluation of Ru(II) complexes with expanded chelate polypyridyl ligands. J Inorg Biochem 2023; 238:112031. [PMID: 36327501 DOI: 10.1016/j.jinorgbio.2022.112031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 10/12/2022] [Accepted: 10/13/2022] [Indexed: 11/06/2022]
Abstract
Photoreactive Ru(II) complexes capable of ejecting ligands have been used extensively for photocaging applications and for the creation of "photocisplatin" reagents. The incorporation of distortion into the structure of the coordination complex lowers the energy of dissociative excited states, increasing the yield of the photosubstitution reaction. While steric clash between ligands induced by adding substituents at the coordinating face of the ligand has been extensively utilized, a lesser known, more subtle approach is to distort the coordination sphere by altering the chelate ring size. Here a systematic study was performed to alter metal-ligand bond lengths, angles, and to cause intraligand distortion by introducing a "linker" atom or group between two pyridine rings. The synthesis, photochemistry, and photobiology of five Ru(II) complexes containing CH2, NH, O, and S-linked dipyridine ligands was investigated. All systems where stable in the dark, and three of the five were photochemically active in buffer. While a clear periodic trend was not observed, this study lays the foundation for the creation of photoactive systems utilizing an alternative type of distortion to facilitate photosubstitution reactions.
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Butnaru I, Constantin CP, Damaceanu MD. Optimization of triphenylamine-based polyimide structure towards molecular sensors for selective detection of heavy/transition metal ions. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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4
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Jakopec S, Pantalon Juraj N, Brozovic A, Jadreško D, Perić B, Kirin SI, Raić‐Malić S. Ferrocene conjugates linked by 1,2,3‐triazole and their Zn(II) and Cu(II) complexes: Synthesis, characterization and biological activity. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6575] [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)
- Silvio Jakopec
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology University of Zagreb Zagreb Croatia
| | - Natalija Pantalon Juraj
- Laboratory for Solid‐State and Complex Compounds Chemistry, Division of Materials Chemistry Ruđer Bošković Institute Zagreb Croatia
| | - Anamaria Brozovic
- Laboratory for Cell Biology and Signalling, Division of Molecular Biology Ruđer Bošković Institute Zagreb Croatia
| | - Dijana Jadreško
- Laboratory for Physical Chemistry of Traces, Division for Marine and Environmental Research Ruđer Bošković Institute Zagreb Croatia
| | - Berislav Perić
- Laboratory for Solid‐State and Complex Compounds Chemistry, Division of Materials Chemistry Ruđer Bošković Institute Zagreb Croatia
| | - Srećko I. Kirin
- Laboratory for Solid‐State and Complex Compounds Chemistry, Division of Materials Chemistry Ruđer Bošković Institute Zagreb Croatia
| | - Silvana Raić‐Malić
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology University of Zagreb Zagreb Croatia
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Selvakumaran B, Murali M. Functional mimic for amine and catechol oxidases: Structural, spectral, electrochemical and catalytic properties of mononuclear copper(II) complex. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Aghahosseini H, Saadati MR, Rezaei SJT, Ramazani A, Asadi N, Yahiro H, Mori M, Shajari N, Kazemizadeh AR. A robust polyfunctional Pd(II)-based magnetic amphiphilic nanocatalyst for the Suzuki-Miyaura coupling reaction. Sci Rep 2021; 11:10239. [PMID: 33986335 PMCID: PMC8119465 DOI: 10.1038/s41598-021-89424-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 04/27/2021] [Indexed: 12/14/2022] Open
Abstract
Herein, a robust Pd(II)-based polyfunctional magnetic amphiphilic artificial metalloenzyme was prepared by anchoring a Pd(2,2'-dipyridylamine)Cl2 bearing hydrophilic monomethyl ether poly(ethylene glycol) (mPEG) chains on the surface of amino-functionalized silica-coated magnetic nanoparticles. The 2,2'-dipyridylamine (dpa) has shown excellent complexation properties for Pd(II) and it could be easily anchored onto functionalized magnetic support by the bridging nitrogen atom. Moreover, the bridging nitrogen atom at the proximity of Pd(II) catalytic center could play an important role in dynamic suppramolecular interactions with substrates. The leaching, air and moisture resistant [Pd(dpa)Cl2] complex endow the dynamic and robust structure to the designed artificial enzyme. Moreover, the water dispersibility of designed artificial metalloenzyme raised from mPEG chains and the magnetic nanoparticles core which could function as protein mimics endow it other necessary characters of artificial enzymes. The prepared artificial metalloenzyme displayed remarkable activity in Suzuki-Miyaura cross-coupling reaction employing low-palladium loading under mild conditions, with the exceptionally high turnover frequency, clean reaction profile, easy work-up procedure, good to excellent products yields and short reaction times. The designed air- and moisture-stable artificial metalloenzyme could recycle more than fifteen times with easy separation procedure in aqueous solution under aerobic conditions without any noticeable loss in activity.
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Affiliation(s)
- Hamideh Aghahosseini
- Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, 45371-38791, Iran
- Department of Biotechnology, Research Institute of Modern Biological Techniques (RIMBT, University of Zanjan, Zanjan, 45371-38791, Iran
| | - Mohammad Reza Saadati
- Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, 45371-38791, Iran
| | | | - Ali Ramazani
- Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, 45371-38791, Iran.
- Department of Biotechnology, Research Institute of Modern Biological Techniques (RIMBT, University of Zanjan, Zanjan, 45371-38791, Iran.
| | - Narges Asadi
- Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, 45371-38791, Iran
| | - Hidenori Yahiro
- Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, Matsuyama, 790-8577, Japan
| | - Masami Mori
- Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, Matsuyama, 790-8577, Japan
| | - Nahid Shajari
- Department of Chemistry, Zanjan Branch, Islamic Azad University, P. O. Box 49195-467, Zanjan, Iran
| | - Ali Reza Kazemizadeh
- Department of Chemistry, Zanjan Branch, Islamic Azad University, P. O. Box 49195-467, Zanjan, Iran
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Jayaprakash H, Guo L, Wang S, Bruneau C, Fischmeister C. Acceptorless and Base-Free Dehydrogenation of Alcohols Mediated by a Dipyridylamine-Iridium(III) Catalyst. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000584] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Harikrishnan Jayaprakash
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; Univ Rennes; 35000 Rennes France
| | - Liwei Guo
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; Univ Rennes; 35000 Rennes France
| | - Shengdong Wang
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; Univ Rennes; 35000 Rennes France
| | - Christian Bruneau
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; Univ Rennes; 35000 Rennes France
| | - Cédric Fischmeister
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; Univ Rennes; 35000 Rennes France
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Kumar A, Bawa S, Ganorkar K, Ghosh SK, Bandyopadhyay A. Syntheses, characterization, multi-acid fluorescence sensing and electroluminescence properties of Cr( ii)-based metallopolymers. Polym Chem 2020. [DOI: 10.1039/d0py00953a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Cr(ii)-Based multifunctional fluorescent metallopolymers with different degrees of backbone rigidity were synthesized and applied as multi-acid sensors and electroluminescent ON–OFF switches.
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Affiliation(s)
- Anil Kumar
- Department of Polymer and Process Engineering
- Saharanpur-247001
- India
| | - Shubham Bawa
- Department of Polymer and Process Engineering
- Saharanpur-247001
- India
| | - Kapil Ganorkar
- Department of Chemistry
- Visvesvaraya National Institute of Technology
- Nagpur
- India
| | - Sujit Kumar Ghosh
- Department of Chemistry
- Visvesvaraya National Institute of Technology
- Nagpur
- India
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