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Manna U, Das G. An overview of anion coordination by hydroxyl, amine and amide based rigid and symmetric neutral dipodal receptors. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213547] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Du Y, Liang F, Hu M, Bu R, Wang M, Tsuda A, Eerdun C. Hydroxychalcone dyes that serve as color indicators for pH and fluoride ions. RSC Adv 2020; 10:37463-37472. [PMID: 35521233 PMCID: PMC9057117 DOI: 10.1039/d0ra06719a] [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: 08/04/2020] [Accepted: 10/03/2020] [Indexed: 01/25/2023] Open
Abstract
A chalcone, which is composed of two aromatic rings bridged by an α,β-unsaturated carbonyl group, exhibits a variety of biological activities. With an objective to develop a novel chalcone-based functional dye, we have synthesized a chalcone diol CLN1, bearing two OH groups at the 2-positions on both phenyl rings, as well as reference compounds CLN2-6, and found that it serves as color indicators for pH and fluoride ions. CLN1 showed a vivid color change from colorless to yellow (halochromism) in water at pH ≥ 10. Furthermore, it presented a selective color change from colorless to red upon the addition of TBAF in an organic solvent such as CH3CN. CLN1 provided a strong red-shifted absorption band in the visible region under alkaline conditions in water and upon the addition of TBAF in CH3CN. The absorption spectral study together with TD-DFT calculations and X-ray crystallographic analysis revealed that the characteristic π-resonant structures of CLN1 caused by the ionization or OH-F- interactions and the planar conformation due to its intramolecular hydrogen bonding may provide a strong charge transfer (CT) absorption in the visible region.
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Affiliation(s)
- Yanqing Du
- Department of Pharmaceutical Sciences, Inner Mongolia Medical University Jinshan Economic & Technology Development District Hohhot Inner Mongolia 010110 China
| | - Fengying Liang
- Department of Pharmaceutical Sciences, Inner Mongolia Medical University Jinshan Economic & Technology Development District Hohhot Inner Mongolia 010110 China
| | - Mixia Hu
- Department of Pharmaceutical Sciences, Inner Mongolia Medical University Jinshan Economic & Technology Development District Hohhot Inner Mongolia 010110 China
| | - Ren Bu
- Department of Pharmaceutical Sciences, Inner Mongolia Medical University Jinshan Economic & Technology Development District Hohhot Inner Mongolia 010110 China
| | - Meiling Wang
- Department of Pharmaceutical Sciences, Inner Mongolia Medical University Jinshan Economic & Technology Development District Hohhot Inner Mongolia 010110 China
| | - Akihiko Tsuda
- Department of Pharmaceutical Sciences, Inner Mongolia Medical University Jinshan Economic & Technology Development District Hohhot Inner Mongolia 010110 China
- Department of Chemistry, Graduate School of Science, Kobe University 1-1 Rokkodai-cho, Nada-ku Kobe 657-8501 Japan
| | - Chaolu Eerdun
- Department of Pharmaceutical Sciences, Inner Mongolia Medical University Jinshan Economic & Technology Development District Hohhot Inner Mongolia 010110 China
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Kanwal S, Ann NU, Fatima S, Emwas AH, Alazmi M, Gao X, Ibrar M, Zaib Saleem RS, Chotana GA. Facile Synthesis of NH-Free 5-(Hetero)Aryl-Pyrrole-2-Carboxylates by Catalytic C-H Borylation and Suzuki Coupling. Molecules 2020; 25:molecules25092106. [PMID: 32365945 PMCID: PMC7248765 DOI: 10.3390/molecules25092106] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 04/26/2020] [Accepted: 04/29/2020] [Indexed: 11/25/2022] Open
Abstract
A convenient two-step preparation of NH-free 5-aryl-pyrrole-2-carboxylates is described. The synthetic route consists of catalytic borylation of commercially available pyrrole-2-carboxylate ester followed by Suzuki coupling without going through pyrrole N–H protection and deprotection steps. The resulting 5-aryl substituted pyrrole-2-carboxylates were synthesized in good- to excellent yields. This synthetic route can tolerate a variety of functional groups including those with acidic protons on the aryl bromide coupling partner. This methodology is also applicable for cross-coupling with heteroaryl bromides to yield pyrrole-thiophene, pyrrole-pyridine, and 2,3’-bi-pyrrole based bi-heteroaryls.
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Affiliation(s)
- Saba Kanwal
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science & Engineering (SBASSE), Lahore University of Management Sciences (LUMS), Lahore 54792, Pakistan; (S.K.); (N.-u.-A.); (S.F.); (M.I.); (R.S.Z.S.)
| | - Noor-ul- Ann
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science & Engineering (SBASSE), Lahore University of Management Sciences (LUMS), Lahore 54792, Pakistan; (S.K.); (N.-u.-A.); (S.F.); (M.I.); (R.S.Z.S.)
| | - Saman Fatima
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science & Engineering (SBASSE), Lahore University of Management Sciences (LUMS), Lahore 54792, Pakistan; (S.K.); (N.-u.-A.); (S.F.); (M.I.); (R.S.Z.S.)
| | - Abdul-Hamid Emwas
- Core Labs, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia;
| | - Meshari Alazmi
- Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division, Computational Bioscience Research Center (CBRC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia; (M.A.); (X.G.)
- College of Computer Science and Engineering, University of Ha’il, P.O. Box 2440, Ha’il 81481, Saudi Arabia
| | - Xin Gao
- Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division, Computational Bioscience Research Center (CBRC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia; (M.A.); (X.G.)
| | - Maha Ibrar
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science & Engineering (SBASSE), Lahore University of Management Sciences (LUMS), Lahore 54792, Pakistan; (S.K.); (N.-u.-A.); (S.F.); (M.I.); (R.S.Z.S.)
| | - Rahman Shah Zaib Saleem
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science & Engineering (SBASSE), Lahore University of Management Sciences (LUMS), Lahore 54792, Pakistan; (S.K.); (N.-u.-A.); (S.F.); (M.I.); (R.S.Z.S.)
| | - Ghayoor Abbas Chotana
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science & Engineering (SBASSE), Lahore University of Management Sciences (LUMS), Lahore 54792, Pakistan; (S.K.); (N.-u.-A.); (S.F.); (M.I.); (R.S.Z.S.)
- Correspondence: ; Tel.: +92-42-3560-8281
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Abstract
Synthetic pyrrole-based anion receptors date back to the 1990s. They have been extensively developed in the context of macrocyclic systems as expanded porphyrins and calixpyrroles, and related systems. The chemistry of open-chain pyrrolic systems is, in many respects, no less venerable. It also has more direct analogy to naturally occurring pyrrole-based anion binding motifs. However, it has not been the subject of a comprehensive review. Presented herein is a summary of efforts devoted to the creation of de novo pyrrole-based receptors, as well as the anion recognition chemistry of naturally occurring pyrrolic systems as prodigiosins and their synthetic analogues.
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Samanta D, Paul I, Schmittel M. Supramolecular five-component nano-oscillator. Chem Commun (Camb) 2017; 53:9709-9712. [DOI: 10.1039/c7cc05235a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A five-component self-sorted metallo-supramolecular nano-oscillator was designed based on the full orthogonality of three different dynamic complexation motifs.
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Affiliation(s)
- Debabrata Samanta
- Center of Micro and Nanochemistry and Engineering
- Organische Chemie I
- Universität Siegen
- D-57068 Siegen
- Germany
| | - Indrajit Paul
- Center of Micro and Nanochemistry and Engineering
- Organische Chemie I
- Universität Siegen
- D-57068 Siegen
- Germany
| | - Michael Schmittel
- Center of Micro and Nanochemistry and Engineering
- Organische Chemie I
- Universität Siegen
- D-57068 Siegen
- Germany
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Maeda H, Fukui A, Yamakado R, Yasuda N. Dipyrrolyphenol as a precursor of π-electronic anion that forms ion pairs with cations. Chem Commun (Camb) 2016; 51:17572-5. [PMID: 26477582 DOI: 10.1039/c5cc07493b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nitro-substituted dipyrrolylphenol was synthesized as a precursor of a π-electronic anion, whose phenolate (phenoxide) moiety upon deprotonation was stabilized by the hydrogen-bond-donating pyrrole NH, thus forming solid-state ion pairs with various cationic species.
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Affiliation(s)
- Hiromitsu Maeda
- College of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu 525-8577, Japan.
| | - Ayaka Fukui
- College of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu 525-8577, Japan.
| | - Ryohei Yamakado
- College of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu 525-8577, Japan.
| | - Nobuhiro Yasuda
- Research and Utilization Division, Japan Synchrotron Radiation Research Institute, Sayo 679-5198, Japan
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Dąbrowa K, Niedbała P, Jurczak J. Anion-tunable control of thermal Z→E isomerisation in basic azobenzene receptors. Chem Commun (Camb) 2014; 50:15748-51. [PMID: 25369943 DOI: 10.1039/c4cc07798a] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Herein, we report that thermal Z→E isomerisation of simple azobenzene urea derivatives is selectively and predictably controlled by anion binding. The rate of this process depends strictly on the anion concentration and its binding affinity to the Z-isomer of the azobenzene host, i.e. increased rate constants are observed for higher anion concentration as well as for more strongly bound guests. The origin of this phenomenon is attributed to the electron density transfer from the anion to the host π-system, resulting in increased repulsion between the lone electron pairs in the N=N bond.
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Affiliation(s)
- Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Science, Kasprzaka 44/52, Warsaw 01-224, Poland.
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