1
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Basavarajappa A, Wang X, Miljanić OŠ. Cycloglycolurils: Hybrid Glycoluril-Cyclobenzil Macrocycles. Org Lett 2024. [PMID: 38626464 DOI: 10.1021/acs.orglett.4c00835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2024]
Abstract
Two novel glycoluril macrocycles have been synthesized from cyclotetrabenzil and cyclotribenzoin precursors using solvent-free condensations with urea. The crystal structure of the cyclotetra(p-phenylene)glycoluril macrocycle shows a twisted ring conformation, while that of the cyclotri(m-phenylene)glycoluril hybrid exhibits a distinct tubular supramolecular packing. These structures establish a potentially broad new class of macrocycles with intriguing guest binding properties owing to their available N-H motifs.
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Affiliation(s)
| | - Xiqu Wang
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| | - Ognjen Š Miljanić
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City 71408, Vietnam
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2
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Del Mauro A, Lapešová J, Rando C, Šindelář V. Merging Bambus[6]uril and Biotin[6]uril into an Enantiomerically Pure Monofunctionalized Hybrid Macrocycle. Org Lett 2024; 26:106-109. [PMID: 38153981 PMCID: PMC10789090 DOI: 10.1021/acs.orglett.3c03715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 12/19/2023] [Accepted: 12/26/2023] [Indexed: 12/30/2023]
Abstract
Bambus[6]urils and biotin[6]urils are macrocycles with an exceptional affinity for inorganic anions. Here, we investigated statistical condensation of 2,4-dibenzylglycoluril and d-biotin, monomers of the corresponding macrocycles, to prepare the enantiomerically pure macrocycle 1 containing a single d-biotin and five glycoluril units. Host-guest properties of 1 in chloroform solution and solid state were investigated. The macrocycle 1 bearing a single functional group was employed in the formation of [1]rotaxane utilizing reversible covalent bonds.
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Affiliation(s)
- Arico Del Mauro
- Department
of Chemistry, Faculty of Science, Masaryk
University, 625 00 Brno, Czech Republic
- RECETOX,
Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
| | - Jana Lapešová
- Department
of Chemistry, Faculty of Science, Masaryk
University, 625 00 Brno, Czech Republic
- RECETOX,
Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
| | - Carola Rando
- Department
of Chemistry, Faculty of Science, Masaryk
University, 625 00 Brno, Czech Republic
- RECETOX,
Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
| | - Vladimír Šindelář
- Department
of Chemistry, Faculty of Science, Masaryk
University, 625 00 Brno, Czech Republic
- RECETOX,
Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
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3
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Khurana R, Alami F, Nijhuis CA, Keinan E, Huskens J, Reany O. Selective Perchlorate Sensing Using Electrochemical Impedance Spectroscopy with Self-Assembled Monolayers of semiaza-Bambusurils. Chemistry 2024; 30:e202302968. [PMID: 37870886 DOI: 10.1002/chem.202302968] [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: 09/12/2023] [Revised: 10/21/2023] [Accepted: 10/23/2023] [Indexed: 10/24/2023]
Abstract
In the last two decades, perchlorate salts have been identified as environmental pollutants and recognized as potential substances affecting human health. We describe self-assembled monolayers (SAMs) of novel semiaza-bambus[6]urils (semiaza-BUs) equipped with thioethers or disulfide (dithiolane) functionalities as surface-anchoring groups on gold electrodes. Cyclic voltammetry (CV) with Fe(CN)6 3-/4- as a redox probe, together with X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and ellipsometry, were employed to characterize the interactions at the interface between the anchoring groups and the metal substrate. Data showed that the anion receptors' packing on the gold strongly depends on the anchoring group. As a result, SAMs of BUs with lipoic amide side chains show a concentration-dependent layer thickness. The BU SAMs are extremely stable on repeated electrochemical potential scans and can selectively recognize perchlorate anions. Our electrochemical impedance spectroscopy (EIS) studies indicated that semiaza-BU equipped with the lipoic amide side chains binds perchlorate (2-100 mM) preferentially over other anions such as F- , Cl- , I- , AcO- , H2 PO4 - , HPO4 2- , SO4 2- , NO2 - , NO3 - , or CO3 2- . The resistance performance is 10 to 100 times more efficient than SAMs containing all other tested anions.
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Affiliation(s)
- Raman Khurana
- Department of Natural Sciences, The Open University of Israel, 1 University Road, Ra'anana, 4353701, Israel
| | - Fuad Alami
- Hybrid Materials for Opto-Electronics Group, MESA+ Institute, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, 7522 NB, Enschede, The Netherlands
| | - Christian A Nijhuis
- Hybrid Materials for Opto-Electronics Group, MESA+ Institute, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, 7522 NB, Enschede, The Netherlands
| | - Ehud Keinan
- Faculty of Chemistry, Technion-Israel Institute of Technology, Technion, Haifa, Israel
| | - Jurriaan Huskens
- Molecular Nanofabrication Group, MESA+ Institute, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, 7522 NB, Enschede, The Netherlands
| | - Ofer Reany
- Department of Natural Sciences, The Open University of Israel, 1 University Road, Ra'anana, 4353701, Israel
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4
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Chvojka M, Madea D, Valkenier H, Šindelář V. Tuning CH Hydrogen Bond-Based Receptors toward Picomolar Anion Affinity via the Inductive Effect of Distant Substituents. Angew Chem Int Ed Engl 2023:e202318261. [PMID: 38063265 DOI: 10.1002/anie.202318261] [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: 11/29/2023] [Indexed: 12/23/2023]
Abstract
Inspired by nature, artificial hydrogen bond-based anion receptors have been developed to achieve high anion selectivity; however, their binding affinity is usually low. The potency of these receptors is usually increased by the introduction of aryl substituents, which withdraw electrons from their binding site through the resonance effect. Here, we show that the polarization of the C(sp3 )-H binding site of bambusuril receptors, and thus their potency to bind anions, can be modulated by the inductive effect. The presence of electron-withdrawing groups on benzyl substituents of bambusurils significantly increases their binding affinities to halides, resulting in the strongest iodide receptor reported to date with an association constant greater than 1013 M-1 in acetonitrile. A Hammett plot showed that while the bambusuril affinity toward halides linearly increases with the electron-withdrawing power of their substituents, their binding selectivity remains essentially unchanged.
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Affiliation(s)
- Matúš Chvojka
- Department of Chemistry, Faculty of Science, Masaryk University, 625 00, Brno, Czech Republic
- RECETOX, Faculty of Science, Masaryk University, 625 00, Brno, Czech Republic
- Engineering of Molecular NanoSystems, École polytechnique de Bruxelles, Université libre de Bruxelles, Avenue F.D. Roosevelt 50, CP165/64, 1050, Brussels, Belgium
| | - Dominik Madea
- Department of Chemistry, Faculty of Science, Masaryk University, 625 00, Brno, Czech Republic
- RECETOX, Faculty of Science, Masaryk University, 625 00, Brno, Czech Republic
| | - Hennie Valkenier
- Engineering of Molecular NanoSystems, École polytechnique de Bruxelles, Université libre de Bruxelles, Avenue F.D. Roosevelt 50, CP165/64, 1050, Brussels, Belgium
| | - Vladimír Šindelář
- Department of Chemistry, Faculty of Science, Masaryk University, 625 00, Brno, Czech Republic
- RECETOX, Faculty of Science, Masaryk University, 625 00, Brno, Czech Republic
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5
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Gorbin SI, Bakibaev AA, Tuguldurova VP, Kotov AV, Sysoev GO, Potapov AS, Pavlov DI, Malkov VS, Knyazev AS, Kurgachev DA, Michalchenkov MV. Synthesis of Novel Phosphorus-Containing Derivatives of 1,3,4-Trimethylglycoluril via the Birum-Oleksyszyn Reaction. Int J Mol Sci 2023; 24:17082. [PMID: 38069405 PMCID: PMC10707106 DOI: 10.3390/ijms242317082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 11/15/2023] [Accepted: 11/23/2023] [Indexed: 12/18/2023] Open
Abstract
This work presents the synthesis of a new compound, 1-[aryl-(diphenylphosphono)methyl]-3,4,6-trimethylglycolurils, via the interaction of benzaldehyde and its mononitro- and monohydroxyderivatives with 1,3,4-trimethylglycoluril and triphenylphosphite. By varying the reaction conditions and the catalysts, the obtained product yields ranged from satisfactory to good. The diastereomers formed during the reaction were separated by semipreparative HPLC on the C18 stationary phase. The isolated diastereomers were characterized by 1H, 13C, and 31P NMR, and the structures of the diastereomers were confirmed using a single-crystal X-ray crystal structure analysis and quantum chemical calculations.
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Affiliation(s)
- Sergey I. Gorbin
- Department of Chemistry, Tomsk State University, 36, Lenin Avenue, Tomsk 634050, Russia
| | - Abdigali A. Bakibaev
- Department of Chemistry, Tomsk State University, 36, Lenin Avenue, Tomsk 634050, Russia
| | - Vera P. Tuguldurova
- Department of Chemistry, Tomsk State University, 36, Lenin Avenue, Tomsk 634050, Russia
| | - Andrey V. Kotov
- Department of Chemistry, Tomsk State University, 36, Lenin Avenue, Tomsk 634050, Russia
| | - Gleb O. Sysoev
- Department of Chemistry, Tomsk State University, 36, Lenin Avenue, Tomsk 634050, Russia
| | - Andrei S. Potapov
- Nikolaev Institute of Inorganic Chemistry, 3 Lavrentiev Avenue, Novosibirsk 630090, Russia
| | - Dmitry I. Pavlov
- Nikolaev Institute of Inorganic Chemistry, 3 Lavrentiev Avenue, Novosibirsk 630090, Russia
| | - Victor S. Malkov
- Department of Chemistry, Tomsk State University, 36, Lenin Avenue, Tomsk 634050, Russia
| | - Alexey S. Knyazev
- Department of Chemistry, Tomsk State University, 36, Lenin Avenue, Tomsk 634050, Russia
| | - Dmitriy A. Kurgachev
- Department of Chemistry, Tomsk State University, 36, Lenin Avenue, Tomsk 634050, Russia
| | - Mark V. Michalchenkov
- Department of Chemistry, Tomsk State University, 36, Lenin Avenue, Tomsk 634050, Russia
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6
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Turebayeva P, Luchsheva V, Fedorishin D, Yerkassov R, Bakibaev A, Bolysbekova S, Tugambayeva T, Sergazina S, Nurmukhanbetova N. Nanoparticles Based on Silver Chloride and Bambusuril[6] for the Fine-Tuning of Biological Activity. Int J Mol Sci 2023; 24:16126. [PMID: 38003315 PMCID: PMC10670921 DOI: 10.3390/ijms242216126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/03/2023] [Accepted: 11/05/2023] [Indexed: 11/26/2023] Open
Abstract
The prevalence of numerous infectious diseases has emerged as a grave concern within the realm of healthcare. Currently, the issue of antibiotic resistance is compelling scientists to explore novel treatment approaches. To combat these infectious diseases, various treatment methods have been developed, harnessing cutting-edge disinfecting nanomaterials. Among the range of metallic nanoparticles employed in medicine, silver nanoparticles (AgNPs) stand out as both highly popular and well-suited for the task. They find extensive utility in cancer diagnosis and therapies and as effective antibacterial agents. The interaction between silver and bacterial cells induces significant structural and morphological alterations, ultimately leading to cell demise. In this study, nanoparticles based on silver and bambusuril[6] (BU[6]) were developed for the first time. These NPs can be used for different biomedical purposes. A simple, single-step, and effective synthesis method was employed to produce bambusuril[6]-protected silver chloride nanoparticles (BU[6]-Ag/AgCl NPs) through the complexation of BU[6] with silver nitrate. The NPs were characterized using X-ray phase analysis (XPS), infrared spectroscopy (IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). When the SEM images were examined, it was seen that the synthesized BU[6]-Ag/AgCl NPs were distributed with homogeneous sizes, and the synthesized NPs were mostly spherical and cubic. The EDS spectra of BU[6]-Ag/AgCl NPs demonstrated the presence of Ag, Cl, and all expected elements. BU[6]-Ag/AgCl NPs showed high antibacterial activity against both E. coli and S. aureus bacteria.
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Affiliation(s)
- Pana Turebayeva
- Department of Chemistry, L.N. Gumilyov Eurasian National University, 010000 Astana, Kazakhstan; (P.T.); (R.Y.)
| | - Venera Luchsheva
- Faculty of Chemistry, National Research Tomsk State University, 634050 Tomsk, Russia; (V.L.); (D.F.)
| | - Dmitriy Fedorishin
- Faculty of Chemistry, National Research Tomsk State University, 634050 Tomsk, Russia; (V.L.); (D.F.)
| | - Rakhmetulla Yerkassov
- Department of Chemistry, L.N. Gumilyov Eurasian National University, 010000 Astana, Kazakhstan; (P.T.); (R.Y.)
| | - Abdigali Bakibaev
- Faculty of Chemistry, National Research Tomsk State University, 634050 Tomsk, Russia; (V.L.); (D.F.)
| | - Saltanat Bolysbekova
- Higher School of Scientific Research, Astana International University, 010000 Astana, Kazakhstan;
| | - Tokzhan Tugambayeva
- Department of Chemistry and Chemical Technologies, Toraighyrov University, 140008 Pavlodar, Kazakhstan;
| | - Samal Sergazina
- Department of Chemistry and Biotechnology, Sh. Ualikhanov University, 020000 Kokshetau, Kazakhstan; (S.S.); (N.N.)
| | - Nurgul Nurmukhanbetova
- Department of Chemistry and Biotechnology, Sh. Ualikhanov University, 020000 Kokshetau, Kazakhstan; (S.S.); (N.N.)
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7
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Abstract
Large water-soluble anions with chaotropic character display surprisingly strong supramolecular interactions in water, for example, with macrocyclic receptors, polymers, biomembranes, and other hydrophobic cavities and interfaces. The high affinity is traced back to a hitherto underestimated driving force, the chaotropic effect, which is orthogonal to the common hydrophobic effect. This review focuses on the binding of large anions with water-soluble macrocyclic hosts, including cyclodextrins, cucurbiturils, bambusurils, biotinurils, and other organic receptors. The high affinity of large anions to molecular receptors has been implemented in several lines of new applications, which are highlighted herein.
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Affiliation(s)
- Khaleel I Assaf
- Constructor University, School of Science, Campus Ring 1, 28759 Bremen, Germany.
- Department of Chemistry, Faculty of Science, Al-Balqa Applied University, 19117 Al-Salt, Jordan.
| | - Werner M Nau
- Constructor University, School of Science, Campus Ring 1, 28759 Bremen, Germany.
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8
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Slávik P, Torrisi J, Jurček P, Sokolov J, Šindelář V. Synthesis of Enantiomerically Pure Bambus[6]urils Utilizing Orthogonal Protection of Glycolurils. J Org Chem 2023; 88:11514-11522. [PMID: 37505936 PMCID: PMC10442914 DOI: 10.1021/acs.joc.3c00667] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Indexed: 07/30/2023]
Abstract
A general strategy for the synthesis of 2N,4N'-disubstituted glycoluril enantiomers on a multigram scale using orthogonal protection is reported. The use of these glycolurils is demonstrated in the synthesis of enantiomerically pure bambus[6]uril macrocycles. Moreover, the deprotection of (S)-1-phenylethyl substituents on the macrocycle was achieved, opening access to various chiral bambus[6]urils via post-macrocyclization modification strategy.
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Affiliation(s)
- Petr Slávik
- Department
of Chemistry, Faculty of Science, Masaryk
University, 625 00 Brno, Czech
Republic
- RECETOX,
Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
| | - Jacopo Torrisi
- Department
of Chemistry, Faculty of Science, Masaryk
University, 625 00 Brno, Czech
Republic
- RECETOX,
Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
| | - Pia Jurček
- Department
of Chemistry, Faculty of Science, Masaryk
University, 625 00 Brno, Czech
Republic
- RECETOX,
Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
| | - Jan Sokolov
- Department
of Chemistry, Faculty of Science, Masaryk
University, 625 00 Brno, Czech
Republic
- RECETOX,
Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
| | - Vladimír Šindelář
- Department
of Chemistry, Faculty of Science, Masaryk
University, 625 00 Brno, Czech
Republic
- RECETOX,
Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
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9
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Bąk KM, Patrick SC, Li X, Beer PD, Davis JJ. Engineered Binding Microenvironments in Halogen Bonding Polymers for Enhanced Anion Sensing. Angew Chem Int Ed Engl 2023; 62:e202300867. [PMID: 36749115 PMCID: PMC10946961 DOI: 10.1002/anie.202300867] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/07/2023] [Accepted: 02/07/2023] [Indexed: 02/08/2023]
Abstract
Mimicking Nature's polymeric protein architectures by designing hosts with binding cavities screened from bulk solvent is a promising approach to achieving anion recognition in competitive media. Accomplishing this, however, can be synthetically demanding. Herein we present a synthetically tractable approach, by directly incorporating potent supramolecular anion-receptive motifs into a polymeric scaffold, tuneable through a judicious selection of the co-monomer. A comprehensive analysis of anion recognition and sensing is demonstrated with redox-active, halogen bonding polymeric hosts. Notably, the polymeric hosts consistently outperform their monomeric analogues, with especially large halide binding enhancements of ca. 50-fold observed in aqueous-organic solvent mixtures. These binding enhancements are rationalised by the generation and presentation of low dielectric constant binding microenvironments from which there is appreciable solvent exclusion.
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Affiliation(s)
- Krzysztof M. Bąk
- Department of ChemistryUniversity of OxfordSouth Parks RoadOxfordOX1 3QZUK
| | - Sophie C. Patrick
- Department of ChemistryUniversity of OxfordSouth Parks RoadOxfordOX1 3QZUK
| | - Xiaoxiong Li
- Department of ChemistryUniversity of OxfordSouth Parks RoadOxfordOX1 3QZUK
| | - Paul D. Beer
- Department of ChemistryUniversity of OxfordSouth Parks RoadOxfordOX1 3QZUK
| | - Jason J. Davis
- Department of ChemistryUniversity of OxfordSouth Parks RoadOxfordOX1 3QZUK
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10
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Dhara A, Fadler RE, Chen Y, Köttner LA, Van Craen D, Carta V, Flood AH. Orthogonal, modular anion-cation and cation-anion self-assembly using pre-programmed anion binding sites. Chem Sci 2023; 14:2585-2595. [PMID: 36908961 PMCID: PMC9993851 DOI: 10.1039/d2sc05121d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 01/20/2023] [Indexed: 02/05/2023] Open
Abstract
Subcomponent self-assembly relies on cation coordination whereas the roles of anions often only emerge during the assembly process. When sites for anions are instead pre-programmed, they have the potential to be used as orthogonal elements to build up structure in a predictable and modular way. We explore this idea by combining cation (M+) and anion (X-) binding sites together and show the orthogonal and modular build up of structure in a multi-ion assembly. Cation binding is based on a ligand (L) made by subcomponent metal-imine chemistry (M+ = Cu+, Au+) while the site for anion binding (X- = BF4 -, ClO4 -) derives from the inner cavity of cyanostar (CS) macrocycles. The two sites are connected by imine condensation between a pyridyl-aldehyde and an aniline-modified cyanostar. The target assembly [LM-CS-X-CS-ML],+ generates two terminal metal complexation sites (LM and ML) with one central anion-bridging site (X) defined by cyanostar dimerization. We showcase modular assembly by isolating intermediates when the primary structure-directing ions are paired with weakly coordinating counter ions. Cation-directed (Cu+) or anion-bridged (BF4 -) intermediates can be isolated along either cation-anion or anion-cation pathways. Different products can also be prepared in a modular way using Au+ and ClO4 -. This is also the first use of gold(i) in subcomponent self-assembly. Pre-programmed cation and anion binding sites combine with judicious selection of spectator ions to provide modular noncovalent syntheses of multi-component architectures.
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Affiliation(s)
- Ayan Dhara
- Department of Chemistry, Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA .,Department of Chemistry and Biochemistry, University of Windsor Windsor Ontario N9B 3P4 Canada
| | - Rachel E Fadler
- Department of Chemistry, Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA .,Wayne State University Law School, Wayne State University 471 W Palmer Ave Detroit MI 48202 USA
| | - Yusheng Chen
- Department of Chemistry, Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA
| | - Laura A Köttner
- Department of Chemistry, Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA .,Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg Nikolaus-Fiebiger-Str. 10 91058 Erlangen Germany
| | - David Van Craen
- Department of Chemistry, Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA .,Department of Chemistry and Chemical Biology, Technische Universität Dortmund Otto-Hahn-Str. 6 44227 Dortmund Germany
| | - Veronica Carta
- Department of Chemistry, Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA
| | - Amar H Flood
- Department of Chemistry, Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA
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11
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Sudan S, Chen DW, Berton C, Fadaei-Tirani F, Severin K. Synthetic Receptors with Micromolar Affinity for Chloride in Water. Angew Chem Int Ed Engl 2023; 62:e202218072. [PMID: 36628647 DOI: 10.1002/anie.202218072] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 01/12/2023]
Abstract
A water-soluble coordination cage was obtained by reaction of Pd(NO3 )2 with a 1,3-di(pyridin-3-yl)benzene ligand featuring a short PEG chain. The cavity of the metal-organic cage contains one nitrate anion, which is readily replaced by chloride. The apparent association constant for chloride binding in buffered aqueous solution is Ka =1.8(±0.1)×105 M-1 . This value is significantly higher than what has been reported for other macrocyclic chloride receptors. The heavier halides Br- and I- compete with binding or self-assembly, but the receptor displays very good selectivity over common anions such as phosphate, acetate, carbonate, and sulfate. A further increase of the chloride binding affinity by a factor of 3 was achieved using a fluorinated dipyridyl ligand.
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Affiliation(s)
- Sylvain Sudan
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Damien W Chen
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Cesare Berton
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Farzaneh Fadaei-Tirani
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Kay Severin
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
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12
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Marchenko E, Luchsheva V, Baigonakova G, Bakibaev A, Vorozhtsov A. Functionalization of the Surface of Porous Nickel-Titanium Alloy with Macrocyclic Compounds. MATERIALS (BASEL, SWITZERLAND) 2022; 16:66. [PMID: 36614409 PMCID: PMC9821612 DOI: 10.3390/ma16010066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/22/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
For the first time, we performed functionalization of the surface of porous titanium nickelide alloys with bambusuril[6]-based macrocyclic compounds by different methods in order to provide the basis for saturation with therapeutic agents to impart antibacterial activity and accelerate its osteogenesis. It has been shown for the first time that the vacuum modification method is preferable for bambusuril deposition, since it provides a uniform deposition of organic matter on both the outer and inner surfaces of the pores. The effect of bambusuril deposition methods on the continuity, structure, and cytocompatibility of the porous titanium nickelide surface was evaluated. In vitro tests proved high biocompatibility and low toxicity of porous TiNi treated with BU[6] under vacuum. The SEM study of the structure of the surface layer of TiNi modified with BU[6] under the vacuum method showed that BU[6] agglomerates are uniformly deposited on the inner and outer surfaces of TiNi pores, which will provide an even saturation of BU[6] cavities with various pharmaceuticals, including antibiotics and inhibitors.
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13
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Galochkin AA, Baranov VV, Kolotyrkina NG, Kravchenko AN. Synthesis of trialkyl semithioglycolurils from alkylthiourea-glyoxal cyclic adducts and dialkylureas. MENDELEEV COMMUNICATIONS 2022. [DOI: 10.1016/j.mencom.2022.11.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Rando C, Vázquez J, Sokolov J, Kokan Z, Nečas M, Šindelář V. Highly Efficient and Selective Recognition of Dicyanoaurate(I) by a Bambusuril Macrocycle in Water. Angew Chem Int Ed Engl 2022; 61:e202210184. [DOI: 10.1002/anie.202210184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Indexed: 11/12/2022]
Affiliation(s)
- Carola Rando
- Department of Chemistry Faculty of Science Masaryk University Kamenice 5 62500 Brno Czech Republic
- RECETOX Faculty of Science Masaryk University Kamenice 5 62500 Brno Czech Republic
| | - Julián Vázquez
- Department of Chemistry Faculty of Science Masaryk University Kamenice 5 62500 Brno Czech Republic
- RECETOX Faculty of Science Masaryk University Kamenice 5 62500 Brno Czech Republic
| | - Jan Sokolov
- Department of Chemistry Faculty of Science Masaryk University Kamenice 5 62500 Brno Czech Republic
- RECETOX Faculty of Science Masaryk University Kamenice 5 62500 Brno Czech Republic
| | - Zoran Kokan
- Department of Chemistry Faculty of Science Masaryk University Kamenice 5 62500 Brno Czech Republic
- RECETOX Faculty of Science Masaryk University Kamenice 5 62500 Brno Czech Republic
| | - Marek Nečas
- Department of Chemistry Faculty of Science Masaryk University Kamenice 5 62500 Brno Czech Republic
| | - Vladimír Šindelář
- Department of Chemistry Faculty of Science Masaryk University Kamenice 5 62500 Brno Czech Republic
- RECETOX Faculty of Science Masaryk University Kamenice 5 62500 Brno Czech Republic
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15
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Rando C, Vázquez J, Sokolov J, Kokan Z, Necas M, Sindelar V. Highly Efficient and Selective Recognition of Dicyanoaurate(I) by a Bambusuril Macrocycle in Water. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Carola Rando
- Masaryk University Faculty of Science: Masarykova univerzita Prirodovedecka Fakulta Department of Chemistry CZECH REPUBLIC
| | - Julián Vázquez
- Masaryk University Faculty of Science: Masarykova univerzita Prirodovedecka Fakulta Department of Chemistry CZECH REPUBLIC
| | - Jan Sokolov
- Masaryk University Faculty of Science: Masarykova univerzita Prirodovedecka Fakulta Department of Chemistry CZECH REPUBLIC
| | - Zoran Kokan
- Masaryk University Faculty of Science: Masarykova univerzita Prirodovedecka Fakulta Deparment of Chemistry CZECH REPUBLIC
| | - Marek Necas
- Masaryk University Faculty of Science: Masarykova univerzita Prirodovedecka Fakulta Department of Chemistry CZECH REPUBLIC
| | - Vladimir Sindelar
- Masaryk University Department of Chemistry Kamenice 5 62500 Brno CZECH REPUBLIC
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16
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Synthesis of Glycoluril Dimers with the Ability to Form Polymeric Self-Associates in Water. CHEMISTRY 2022. [DOI: 10.3390/chemistry4030053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Supramolecular self-assembly in water resulting in polymeric structures is emerging because of its potential in the preparation of adaptive materials with applications in biology and medicine. Here, we report the first example of host molecules based on glycoluril dimers, which self-associate into linear oligomers in water. The degree of polymerization for the resulting supramolecular aggregates was calculated using the isodesmic model and the Carothers equation. The model compound was prepared to enable a deeper understanding of the forces responsible for the self-association of the glycoluril dimer-based monomers in water.
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17
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Bambus[4,6]urils as Dual Scaffolds for Multivalent Iminosugar Presentation and Ion Transport: Access to Unprecedented Glycosidase-Directed Anion Caging Agents. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27154772. [PMID: 35897947 PMCID: PMC9330389 DOI: 10.3390/molecules27154772] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 07/19/2022] [Accepted: 07/21/2022] [Indexed: 11/25/2022]
Abstract
Bambusurils, BU[4] and BU[6], were used for the first time as multivalent scaffolds to link glycosidases inhibitors derived from 1-deoxynojirimycin (DNJ). Two linear DNJ ligands having six or nine carbon alkyl azido linkers or a trivalent DNJ dendron were grafted onto octapropargylated BU[4] and dodecapropargylated BU[6] using copper-catalyzed cycloaddition (CuAAC) to yield corresponding neoglycobambus[4] and neoglycobambus[6]urils bearing 8 to 24 iminosugars. The inhibition potencies of neoglycoBU[4], neoglycoBU[6] and neoglycoBU[6] caging anions were evaluated against Jack Bean α-mannosidase and compared to monovalent DNJ derivatives. Strong affinity enhancements per inhibitory head were obtained for the clusters holding trivalent dendrons with inhibitory constants in the nanomolar range (Ki = 24 nM for BU[4] with 24 DNJ units). Interestingly, the anion (bromide or iodide) encapsulated inside the cavity of BU[6] does not modify the inhibition potency of neoglycoBU[6], opening the way to water-soluble glycosidase-directed anion caging agents that may find applications in important fields such as bio(in)organic chemistry or oncology.
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18
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De Simone NA, Chvojka M, Lapešová J, Martínez-Crespo L, Slávik P, Sokolov J, Butler SJ, Valkenier H, Šindelář V. Monofunctionalized Fluorinated Bambusurils and Their Conjugates for Anion Transport and Extraction. J Org Chem 2022; 87:9829-9838. [PMID: 35862261 DOI: 10.1021/acs.joc.2c00870] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Bambusurils are macrocyclic molecules that are known for their high binding affinity and selectivity toward anions. Here, we present the preparation of two bambusurils bearing fluorinated substituents and one carboxylic function. These monofunctionalized bambusurils were conjugated with crown ether and cholesterol units. The resulting conjugates were successfully tested in liquid-liquid extraction of inorganic salts and chloride/bicarbonate transport across lipid bilayers.
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Affiliation(s)
| | - Matúš Chvojka
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno 62500, Czech Republic.,RECETOX, Faculty of Science, Masaryk University, Kamenice 5, Brno 62500, Czech Republic.,Engineering of Molecular NanoSystems, Ecole polytechnique de Bruxelles, Université libre de Bruxelles, Avenue F.D. Roosevelt 50, CP 165/64, Brussels 1050, Belgium
| | - Jana Lapešová
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno 62500, Czech Republic
| | - Luis Martínez-Crespo
- Engineering of Molecular NanoSystems, Ecole polytechnique de Bruxelles, Université libre de Bruxelles, Avenue F.D. Roosevelt 50, CP 165/64, Brussels 1050, Belgium
| | - Petr Slávik
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno 62500, Czech Republic
| | - Jan Sokolov
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno 62500, Czech Republic
| | - Stephen J Butler
- Department of Chemistry, Loughborough University, Epinal Way, Loughborough LE11 3TU, U.K
| | - Hennie Valkenier
- Engineering of Molecular NanoSystems, Ecole polytechnique de Bruxelles, Université libre de Bruxelles, Avenue F.D. Roosevelt 50, CP 165/64, Brussels 1050, Belgium
| | - Vladimír Šindelář
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno 62500, Czech Republic
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19
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Kubik S. When Molecules Meet in Water-Recent Contributions of Supramolecular Chemistry to the Understanding of Molecular Recognition Processes in Water. Chemistry 2022; 11:e202200028. [PMID: 35373466 PMCID: PMC8977507 DOI: 10.1002/open.202200028] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/17/2022] [Indexed: 12/19/2022]
Abstract
Molecular recognition processes in water differ from those in organic solvents in that they are mediated to a much greater extent by solvent effects. The hydrophobic effect, for example, causes molecules that only weakly interact in organic solvents to stay together in water. Such water‐mediated interactions can be very efficient as demonstrated by many of the synthetic receptors discussed in this review, some of which have substrate affinities matching or even surpassing those of natural binders. However, in spite of considerable success in designing such receptors, not all factors determining their binding properties in water are fully understood. Existing concepts still provide plausible explanations why the reorganization of water molecules often causes receptor‐substrate interactions in water to be strongly exothermic rather than entropically favored as predicted by the classical view of the hydrophobic effect.
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Affiliation(s)
- Stefan Kubik
- Technische Universität Kaiserslautern, Fachbereich Chemie - Organische Chemie, Erwin-Schrödinger-Straße 54, 67663, Kaiserslautern, Germany
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20
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Del Mauro A, Kokan Z, Šindelář V. Dynamic [1]rotaxanes via a reversible covalent bond and host-guest anion recognition. Chem Commun (Camb) 2022; 58:3815-3818. [PMID: 35234240 DOI: 10.1039/d2cc00779g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bambus[6]uril-based [1]rotaxanes were formed quantitatively, utilizing a bis(acyloxy)iodate(I) reversible covalent bond and host-guest anion recognition. These novel [1]rotaxanes exhibited a dynamic nature facilitating carboxylate component exchange reactions in acetonitrile.
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Affiliation(s)
- Arico Del Mauro
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Zoran Kokan
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Vladimír Šindelář
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
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21
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Perchlorate Solid-Contact Ion-Selective Electrode Based on Dodecabenzylbambus[6]uril. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10030115] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Dodecabenzylbambus[6]uril (Bn12BU[6]) is an anion receptor that binds the perchlorate ion the most tightly (stability constant ~1010 M−1) of all anions due to the excellent match between the ion size in relation to the receptor cavity. This new bambusuril compound was used as an ionophore in the ion-selective membrane (ISM) to develop ion selective electrodes (ISEs) for determination of perchlorate concentration utilizing the poly(3,4-ethylenedioxythiophene) (PEDOT) polymer film as a solid-contact material. Variation of the content of Bn12BU[6] and tridodecylmethylammonium chloride (TDMACl) in the plasticized poly(vinyl chloride)-based ISM was also tested. All the prepared solid-contact ISEs and their analytical performance were characterized by potentiometry, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and chronopotentiometry. The ISEs showed rapid response and a sub-Nernstian slope (~57 mV/decade) during potentiometric measurements in perchlorate solutions in the concentration range from 10−1 to 10−6 M simultaneously with their high stability and sufficient selectivity to other common inorganic anions like bromide, chloride, nitrate and sulphate. The function of the ISE was further verified by analysis of real water samples (lake, sea, and mineral water), which gave accurate and precise results.
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22
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Mirzaei S, Espinoza Castro VM, Hernández Sánchez R. Nonspherical anion sequestration by C-H hydrogen bonding. Chem Sci 2022; 13:2026-2032. [PMID: 35308854 PMCID: PMC8849022 DOI: 10.1039/d1sc07041j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 01/22/2022] [Indexed: 12/05/2022] Open
Abstract
Macrocyclic arenes laid the foundations of supramolecular chemistry and their study established the fundamentals of noncovalent interactions. Advancing their frontier, here we designed rigidified resorcin[4]arenes that serve as hosts for large nonspherical anions. In one synthetic step, we vary the host's anion affinity properties by more than seven orders of magnitude. This is possible by engineering electropositive aromatic C–H bond donors in an idealized square planar geometry embedded within the host's inner cavity. The hydrogen atom's electropositivity is tuned by introducing fluorine atoms as electron withdrawing groups. These novel macrocycles, termed fluorocages, are engineered to sequester large anions. Indeed, experimental data shows an increase in the anion association constant (Ka) as the number of F atoms increase. The observed trend is rationalized by DFT calculations of Hirshfeld Charges (HCs). Most importantly, fluorocages in solution showed weak-to-medium binding affinity for large anions like [PF6]− (102< Ka <104 M−1), and high affinity for [MeSO3]− (Ka >106). Fluorocages: new class of rigidified host utilizing nontraditional C–H hydrogen bonds to capture the nonspherical anions.![]()
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Affiliation(s)
- Saber Mirzaei
- Department of Chemistry, University of Pittsburgh 219 Parkman Ave. Pittsburgh Pennsylvania 15260 USA
| | - Victor M Espinoza Castro
- Department of Chemistry, University of Pittsburgh 219 Parkman Ave. Pittsburgh Pennsylvania 15260 USA
| | - Raúl Hernández Sánchez
- Department of Chemistry, University of Pittsburgh 219 Parkman Ave. Pittsburgh Pennsylvania 15260 USA
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23
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Krämer J, Kang R, Grimm LM, De Cola L, Picchetti P, Biedermann F. Molecular Probes, Chemosensors, and Nanosensors for Optical Detection of Biorelevant Molecules and Ions in Aqueous Media and Biofluids. Chem Rev 2022; 122:3459-3636. [PMID: 34995461 PMCID: PMC8832467 DOI: 10.1021/acs.chemrev.1c00746] [Citation(s) in RCA: 109] [Impact Index Per Article: 54.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Synthetic molecular probes, chemosensors, and nanosensors used in combination with innovative assay protocols hold great potential for the development of robust, low-cost, and fast-responding sensors that are applicable in biofluids (urine, blood, and saliva). Particularly, the development of sensors for metabolites, neurotransmitters, drugs, and inorganic ions is highly desirable due to a lack of suitable biosensors. In addition, the monitoring and analysis of metabolic and signaling networks in cells and organisms by optical probes and chemosensors is becoming increasingly important in molecular biology and medicine. Thus, new perspectives for personalized diagnostics, theranostics, and biochemical/medical research will be unlocked when standing limitations of artificial binders and receptors are overcome. In this review, we survey synthetic sensing systems that have promising (future) application potential for the detection of small molecules, cations, and anions in aqueous media and biofluids. Special attention was given to sensing systems that provide a readily measurable optical signal through dynamic covalent chemistry, supramolecular host-guest interactions, or nanoparticles featuring plasmonic effects. This review shall also enable the reader to evaluate the current performance of molecular probes, chemosensors, and nanosensors in terms of sensitivity and selectivity with respect to practical requirement, and thereby inspiring new ideas for the development of further advanced systems.
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Affiliation(s)
- Joana Krämer
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Rui Kang
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Laura M. Grimm
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Luisa De Cola
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Dipartimento
DISFARM, University of Milano, via Camillo Golgi 19, 20133 Milano, Italy
- Department
of Molecular Biochemistry and Pharmacology, Instituto di Ricerche Farmacologiche Mario Negri, IRCCS, 20156 Milano, Italy
| | - Pierre Picchetti
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- P.P.: email,
| | - Frank Biedermann
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- F.B.: email,
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24
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Šakarašvili M, Ustrnul L, Suut E, Nallaparaju JV, Mishra KA, Konrad N, Adamson J, Borovkov V, Aav R. Self-Assembly of Chiral Cyclohexanohemicucurbit[n]urils with Bis(Zn Porphyrin): Size, Shape, and Time-Dependent Binding. Molecules 2022; 27:molecules27030937. [PMID: 35164200 PMCID: PMC8839860 DOI: 10.3390/molecules27030937] [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: 11/12/2021] [Revised: 01/19/2022] [Accepted: 01/25/2022] [Indexed: 12/10/2022] Open
Abstract
In order to investigate the ability of bis(zinc octaethylporphyrin) (bis–ZnOEP) to discriminate cyclohexanohemicucurbit[n]urils (cycHC[n]) of different shapes and sizes, the self-assembly of barrel-shaped chiral cycHC[n] with bis–ZnOEP was studied by various spectroscopic methods (absorption, fluorescence, circular dichroism (CD), and NMR). While the binding of 6-membered cycHC[6] induced a tweezer-like conformation followed by the formation of anti-form of bis–ZnOEP upon further addition of cycHC[6], the interaction of 8-membered cycHC[8] is more complex and proceeds through the featured syn-to-anti conformational change of bis–ZnOEP and further intermolecular self-assembly via multiple noncovalent associations between cycHC[8] and bis–ZnOEP. Whilst bis–porphyrins are known to be effective chemical sensors able to differentiate various guests based on their chirality via induced CD, their ability to sense small differences in the shape and size of relatively large macrocycles, such as chiral cycHC[6] and cycHC[8], is scarcely examined. Both studied complexes exhibited characteristic induced CD signals in the region of porphyrin absorption upon complexation.
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Affiliation(s)
- Marko Šakarašvili
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, 12618 Tallinn, Estonia; (M.Š.); (L.U.); (E.S.); (J.V.N.); (K.A.M.); (N.K.)
| | - Lukas Ustrnul
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, 12618 Tallinn, Estonia; (M.Š.); (L.U.); (E.S.); (J.V.N.); (K.A.M.); (N.K.)
| | - Elina Suut
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, 12618 Tallinn, Estonia; (M.Š.); (L.U.); (E.S.); (J.V.N.); (K.A.M.); (N.K.)
| | - Jagadeesh Varma Nallaparaju
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, 12618 Tallinn, Estonia; (M.Š.); (L.U.); (E.S.); (J.V.N.); (K.A.M.); (N.K.)
| | - Kamini A. Mishra
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, 12618 Tallinn, Estonia; (M.Š.); (L.U.); (E.S.); (J.V.N.); (K.A.M.); (N.K.)
| | - Nele Konrad
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, 12618 Tallinn, Estonia; (M.Š.); (L.U.); (E.S.); (J.V.N.); (K.A.M.); (N.K.)
| | - Jasper Adamson
- Laboratory of Chemical Physics, National Institute of Chemical Physics and Biophysics, 12618 Tallinn, Estonia;
| | - Victor Borovkov
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, 12618 Tallinn, Estonia; (M.Š.); (L.U.); (E.S.); (J.V.N.); (K.A.M.); (N.K.)
- Correspondence: (V.B.); (R.A.)
| | - Riina Aav
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, 12618 Tallinn, Estonia; (M.Š.); (L.U.); (E.S.); (J.V.N.); (K.A.M.); (N.K.)
- Correspondence: (V.B.); (R.A.)
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25
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Zeng Q, Long Q, Lu J, Wang L, You Y, Yuan X, Zhang Q, Ge Q, Cong H, Liu M. Synthesis of a novel aminobenzene-containing hemicucurbituril and its fluorescence spectral properties with ions. Beilstein J Org Chem 2021; 17:2840-2847. [PMID: 34956406 PMCID: PMC8685562 DOI: 10.3762/bjoc.17.195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Accepted: 11/19/2021] [Indexed: 11/23/2022] Open
Abstract
A novel hemicucurbituril-based macrocycle, alternately consisting of amidobenzene and 2-imidazolidione moieties was designed and synthesized. Based on the fragment coupling strategy, nitrobenzene-containing hemicucurbituril was firstly prepared facilely under alkaline environment, and reduction of the nitro groups produced the desired amidobenzene-containing hemicucurbituril. As an original fluorescent chemosensor, it exhibited strong interactions with Fe3+ over other metal cations. The experimental evidence of fluorescence spectra suggested that a 1:1 complex was formed between this macrocycle and Fe3+ with an association constant up to (2.1 ± 0.3) × 104 M−1. Meanwhile, this macrocycle showed no obvious or only slight enhancement of the fluorescence intensity with selected anions.
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Affiliation(s)
- Qingkai Zeng
- Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou Province 550025, PR China
| | - Qiumeng Long
- Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou Province 550025, PR China
| | - Jihong Lu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou Province 550025, PR China
| | - Li Wang
- Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou Province 550025, PR China
| | - Yuting You
- Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou Province 550025, PR China
| | - Xiaoting Yuan
- Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou Province 550025, PR China
| | - Qianjun Zhang
- Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou Province 550025, PR China
| | - Qingmei Ge
- Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou Province 550025, PR China
| | - Hang Cong
- Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou Province 550025, PR China
| | - Mao Liu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou Province 550025, PR China
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26
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Shalima T, Mishra KA, Kaabel S, Ustrnul L, Bartkova S, Tõnsuaadu K, Heinmaa I, Aav R. Cyclohexanohemicucurbit[8]uril Inclusion Complexes With Heterocycles and Selective Extraction of Sulfur Compounds From Water. Front Chem 2021; 9:786746. [PMID: 34926407 PMCID: PMC8678634 DOI: 10.3389/fchem.2021.786746] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/04/2021] [Indexed: 11/13/2022] Open
Abstract
Solid-phase extraction that utilizes selective macrocyclic receptors can serve as a useful tool for removal of chemical wastes. Hemicucurbiturils are known to form inclusion complexes with suitably sized anions; however, their use in selective binding of non-charged species is still very limited. In this study, we found that cyclohexanohemicucurbit[8]uril encapsulates five- and six-membered sulfur- and oxygen-containing unsubstituted heterocycles, which is investigated by single-crystal X-ray diffraction, NMR spectroscopy, isothermal titration calorimetry, and thermogravimetry. The macrocycle acts as a promising selective sorption material for the extraction of sulfur heterocycles, such as 1,3-dithiolane and α-lipoic acid, from water.
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Affiliation(s)
- Tatsiana Shalima
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | - Kamini A Mishra
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | - Sandra Kaabel
- Department of Chemistry, McGill University, Montreal, QC, Canada
| | - Lukas Ustrnul
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | - Simona Bartkova
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | - Kaia Tõnsuaadu
- Laboratory of Inorganic Materials, School of Engineering, Institute of Materials and Environmental Technology, Tallinn University of Technology, Tallinn, Estonia
| | - Ivo Heinmaa
- Laboratory of Chemical Physics, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - Riina Aav
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
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27
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Cohen Y, Slovak S, Avram L. Solution NMR of synthetic cavity containing supramolecular systems: what have we learned on and from? Chem Commun (Camb) 2021; 57:8856-8884. [PMID: 34486595 DOI: 10.1039/d1cc02906a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
NMR has been instrumental in studies of both the structure and dynamics of molecular systems for decades, so it is not surprising that NMR has played a pivotal role in the study of host-guest complexes and supramolecular systems. In this mini-review, selected examples will be used to demonstrate the added value of using (multiparametric) NMR for studying macrocycle-based host-guest and supramolecular systems. We will restrict the discussion to synthetic host systems having a cavity that can engulf their guests thus restricting them into confined spaces. So discussion of selected examples of cavitands, cages, capsules and their complexes, aggregates and polymers as well as organic cages and porous liquids and other porous materials will be used to demonstrate the insights that have been gathered from the extracted NMR parameters when studying such systems emphasizing the information obtained from somewhat less routine NMR methods such as diffusion NMR, diffusion ordered spectroscopy (DOSY) and chemical exchange saturation transfer (CEST) and their variants. These selected examples demonstrate the impact that the results and findings from these NMR studies have had on our understanding of such systems and on the developments in various research fields.
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Affiliation(s)
- Yoram Cohen
- School of Chemistry, The Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 699781, Tel Aviv, Israel.
| | - Sarit Slovak
- School of Chemistry, The Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 699781, Tel Aviv, Israel.
| | - Liat Avram
- Faculty of Chemistry, Weizmann Institute of Science, Rehovot 7610001, Israel
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28
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Ustrnul L, Burankova T, Öeren M, Juhhimenko K, Ilmarinen J, Siilak K, Mishra KA, Aav R. Binding Between Cyclohexanohemicucurbit[ n]urils and Polar Organic Guests. Front Chem 2021; 9:701028. [PMID: 34262895 PMCID: PMC8273652 DOI: 10.3389/fchem.2021.701028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 06/07/2021] [Indexed: 11/13/2022] Open
Abstract
Inherently chiral, barrel-shaped, macrocyclic hosts such as cyclohexanohemicucurbit[n]urils (cycHC[n]) bind zinc porphyrins and trifluoroacetic acid externally in halogenated solvents. In the current study, we tested a set of eighteen organic guests with various functional groups and polarity, namely, thiophenols, phenols, and carboxylic and sulfonic acids, to identify a preference toward hydrogen bond–donating molecules for homologous cycHC[6] and cycHC[8]. Guests were characterized by Hirshfeld partial charges on acidic hydrogens and their binding by 1H and 19F NMR titrations. Evaluation of association constants revealed the complexity of the system and indirectly proved an external binding with stoichiometry over 2:1 for both homologs. It was found that overall binding strength is influenced by the stoichiometry of the formed complexes, the partial atomic charge on the hydrogen atom of the hydrogen bond donor, and the bulkiness of the guest. Additionally, a study on the formation of complexes with halogen anions (Cl− and Br−) in methanol and chloroform, analyzed by 1H NMR, did not confirm complexation. The current study widens the scope of potential applications for host molecules by demonstrating the formation of hydrogen-bonded complexes with multisite hydrogen bond acceptors such as cycHC[6] and cycHC[8].
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Affiliation(s)
- Lukas Ustrnul
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | | | - Mario Öeren
- Optibrium Limited, Cambridge, United Kingdom
| | - Kristina Juhhimenko
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | - Jenni Ilmarinen
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | - Kristjan Siilak
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | - Kamini A Mishra
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | - Riina Aav
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Tallinn, Estonia
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29
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Martínez‐Crespo L, Hewitt SH, De Simone NA, Šindelář V, Davis AP, Butler S, Valkenier H. Transmembrane Transport of Bicarbonate Unravelled*. Chemistry 2021; 27:7367-7375. [PMID: 33932059 PMCID: PMC8251953 DOI: 10.1002/chem.202100491] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Indexed: 02/06/2023]
Abstract
Anion receptors can be used to transport ions across lipid bilayers, which has potential for therapeutic applications. Synthetic bicarbonate transporters are of particular interest, as defects in transmembrane transport of bicarbonate are associated with various diseases. However, no convenient method exists to directly observe bicarbonate transport and study the mechanisms involved. Here, an assay is presented that allows the kinetics of bicarbonate transport into liposomes to be monitored directly and with great sensitivity. The assay utilises an encapsulated europium(III) complex, which exhibits a large increase in emission intensity upon binding bicarbonate. Mechanisms involving CO2 diffusion and the dissipation of a pH gradient are shown to be able to lead to an increase in bicarbonate concentration within liposomes, without transport of the anion occurring at all. By distinguishing these alternative mechanisms from actual bicarbonate transport, this assay will inform the future development of bicarbonate transporters.
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Affiliation(s)
- Luis Martínez‐Crespo
- Université Libre de Bruxelles (ULB)Engineering of Molecular NanoSystems, Ecole polytechnique de BruxellesAvenue F.D. Roosevelt 50, CP165/641050BrusselsBelgium
| | - Sarah H. Hewitt
- Loughborough UniversityDepartment of ChemistryEpinal WayLoughboroughLE11 3TUUK
| | | | - Vladimír Šindelář
- Masaryk UniversityDepartment of Chemistry and RECETOX, Faculty of ScienceKamenice 5625 00BrnoCzech Republic
| | - Anthony P. Davis
- University of BristolSchool of ChemistryCantock's CloseBristolBS8 1TSUK
| | - Stephen Butler
- Loughborough UniversityDepartment of ChemistryEpinal WayLoughboroughLE11 3TUUK
| | - Hennie Valkenier
- Université Libre de Bruxelles (ULB)Engineering of Molecular NanoSystems, Ecole polytechnique de BruxellesAvenue F.D. Roosevelt 50, CP165/641050BrusselsBelgium
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30
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Hamacek J, Sokolov J, Šindelář V. Bambusuril Macrocycles as Mediators of Supramolecular Interactions: Application to the Europium Cage Helicate. Chemistry 2021; 27:5492-5497. [PMID: 33442893 DOI: 10.1002/chem.202005140] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Indexed: 11/07/2022]
Abstract
Herein, it is shown how bambusurils can be used for tuning and/or characterizing supramolecular systems. Indeed, the addition of bambusurils as anion scavengers to metal-mediated self-assemblies allows manipulation of the subtle equilibria in the given system. This is demonstrated for the case of the tetranuclear europium helical cage, which is well suited to different applications. Among the reported results, experimental evidence is provided showing that perchlorate and triflate anions act as a molecular template for the cage assembly. The complexation of inorganic anions with neutral bambusurils resulted in bulky non-coordinating counterions that may trigger the self-assembly process or stimulate specific interactions between components. Moreover, bambusuril was able to selectively remove coordinating nitrates from the mixture with non-coordinating anions, enabling the regeneration of the helical cage.
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Affiliation(s)
- Josef Hamacek
- Centre de Biophysique Moléculaire (CBM), CNRS UPR4301, Rue Charles Sadron, 45071, Orléans, France
| | - Jan Sokolov
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 62500, Brno, Czech Republic
| | - Vladimír Šindelář
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 62500, Brno, Czech Republic
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31
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Mishra KA, Adamson J, Öeren M, Kaabel S, Fomitšenko M, Aav R. Dynamic chiral cyclohexanohemicucurbit[12]uril. Chem Commun (Camb) 2020; 56:14645-14648. [PMID: 33155596 DOI: 10.1039/d0cc06817a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
NMR spectroscopy and DFT modeling studies of chiral cyclohexanohemicucurbit[12]uril indicate that the macrocycle adopts a concave octagonal shape with two distinct conformational flexibilities in solution. Methylene bridge flipping occurs at temperatures above 265 K, while urea monomers rotate at temperatures above 308 K, resulting in the loss of confined space within the macrocycle.
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Affiliation(s)
- Kamini A Mishra
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia.
| | - Jasper Adamson
- Chemical Physics Laboratory, National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia
| | - Mario Öeren
- Optibrium Limited, F5-6 Blenheim House, Denny End Road, Cambridge, CB25 9PB, UK
| | - Sandra Kaabel
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia. and Department of Chemistry, McGill University, 801 Sherbrooke Street West, H3A 0B8, Montreal, Quebec, Canada
| | - Maria Fomitšenko
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia.
| | - Riina Aav
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia.
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32
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Sokolov J, Štefek A, Šindelář V. Functionalized Chiral Bambusurils: Synthesis and Host-Guest Interactions with Chiral Carboxylates. Chempluschem 2020; 85:1307-1314. [PMID: 32558370 DOI: 10.1002/cplu.202000261] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/27/2020] [Indexed: 12/30/2022]
Abstract
Bambusurils are a class of macrocyclic anion receptors that exhibit notable anion recognition properties, able to bind various inorganic anions as well the carboxylates or sulfonates. Recently, we reported enantioselective recognition of chiral carboxylates using non-functionalized chiral bambusuril derivatives. Herein, we report the synthesis and host-guest properties of two new representatives of chiral bambusuril macrocycles bearing ester functional groups, differing by the substituents attached to their portals. Their supramolecular properties in terms of carboxylate binding were studied by means of NMR in DMSO-d6 . The reported bambusurils bind selected chiral carboxylates with enantioselectivity factors up to 3.1. The results indicated that the selectivity towards different carboxylates is governed by the steric constraint of the substituents surrounding bambusuril portals. No clear trend in the binding affinities and their enantioselectivities was found.
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Affiliation(s)
- Jan Sokolov
- Department of Chemistry and RECETOX Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Adam Štefek
- Department of Chemistry and RECETOX Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Vladimír Šindelář
- Department of Chemistry and RECETOX Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
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33
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Lafosse M, Cartier E, Solmont K, Rivollier J, Azazna D, Thuéry P, Boulard Y, Gontier A, Charbonnier JB, Kuhnast B, Heck MP. Clickable Bambusurils to Access Multivalent Architectures. Org Lett 2020; 22:3099-3103. [PMID: 32243185 DOI: 10.1021/acs.orglett.0c00856] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Propargylated bambus[4,6]urils were prepared by an efficient one-step condensation of dipropargylglycoluril with formaldehyde under microwave irradiation. Their functionalization by click chemistry (CuAAC) afforded new multivalent architectures decorated with 8 or 12 ligands. Grafting of glycosides provided water-soluble glycobambus[4,6]uril platforms with glucosyl12BU[6] showing good affinity toward iodide anion in aqueous medium.
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Affiliation(s)
- Marine Lafosse
- Université Paris-Saclay, CEA, Service de Chimie Bio-organique et de Marquage, 91191 Gif-sur-Yvette, France
| | - Elise Cartier
- Université Paris-Saclay, CEA, Service de Chimie Bio-organique et de Marquage, 91191 Gif-sur-Yvette, France
| | - Kathleen Solmont
- Université Paris-Saclay, CEA, Service de Chimie Bio-organique et de Marquage, 91191 Gif-sur-Yvette, France.,Université Paris-Saclay, CEA, Service Hospitalier Frédéric Joliot, IMIV, 91401 Orsay, France
| | - Julie Rivollier
- Université Paris-Saclay, CEA, Service de Chimie Bio-organique et de Marquage, 91191 Gif-sur-Yvette, France
| | - Djamille Azazna
- Université Paris-Saclay, CEA, Service de Chimie Bio-organique et de Marquage, 91191 Gif-sur-Yvette, France
| | - Pierre Thuéry
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette, France
| | - Yves Boulard
- Université Paris-Saclay, CEA, I2BC, 91191 Gif-sur-Yvette, France
| | - Amandine Gontier
- Université Paris-Saclay, CEA, I2BC, 91191 Gif-sur-Yvette, France
| | | | - Bertrand Kuhnast
- Université Paris-Saclay, CEA, Service Hospitalier Frédéric Joliot, IMIV, 91401 Orsay, France
| | - Marie-Pierre Heck
- Université Paris-Saclay, CEA, Service de Chimie Bio-organique et de Marquage, 91191 Gif-sur-Yvette, France
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34
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A search for synthetic routes to tetrabenzylglycoluril. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-019-00941-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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35
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Theoretical study on the complexation of the hexafluorophosphate, hexafluoroarsenate, and hexafluoroantimonate anions with dodecabenzylbambus[6] uril. MONATSHEFTE FUR CHEMIE 2020. [DOI: 10.1007/s00706-020-02569-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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36
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Maršálek K, Šindelář V. Monofunctionalized Bambus[6]urils and Their Conjugates with Crown Ethers for Liquid-Liquid Extraction of Inorganic Salts. Org Lett 2020; 22:1633-1637. [PMID: 32023070 DOI: 10.1021/acs.orglett.0c00216] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bambusurils are a growing family of macrocyclic anion receptors. In this Letter, we present the first syntheses of monofunctionalized bambusurils and their use for the preparation of heteroditopic bambusuril-crown ether conjugates suitable for the extraction of ion pairs from water to chloroform.
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Affiliation(s)
- Kamil Maršálek
- Department of Chemistry and RECETOX, Faculty of Science , Masaryk University , Kamenice 5 , 625 00 Brno , Czech Republic
| | - Vladimír Šindelář
- Department of Chemistry and RECETOX, Faculty of Science , Masaryk University , Kamenice 5 , 625 00 Brno , Czech Republic
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37
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Mondal P, Solel E, Mitra S, Keinan E, Reany O. Equatorial Sulfur Atoms in Bambusurils Spawn Cavity Collapse. Org Lett 2020; 22:204-208. [PMID: 31846336 DOI: 10.1021/acs.orglett.9b04166] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
This study confirms the hypothesis that bambusurils (BUs) with equatorial sulfur atoms cannot assume an anion-binding jigger conformation due to strong intramolecular van der Waals attractive interactions. NMR, X-ray crystallography, and computation with newly synthesized eq-semithio-BU[4] and ax-semiaza-eq-semithio-BU[4]s indicate that they all assume compact conformations. Intramolecular distances and a torsional angle serve as reliable indicators of the conformation of any BU. Chemoselective alkylation at the peripheral (equatorial) thiourea functions provides a convenient entry to novel hetero-BUs.
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Affiliation(s)
- Pravat Mondal
- Department of Natural Sciences , The Open University of Israel , Ra'anana 4353701 , Israel.,The Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Technion City , Haifa 3200003 , Israel
| | - Ephrath Solel
- The Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Technion City , Haifa 3200003 , Israel
| | - Shubhanjan Mitra
- Department of Natural Sciences , The Open University of Israel , Ra'anana 4353701 , Israel.,The Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Technion City , Haifa 3200003 , Israel
| | - Ehud Keinan
- The Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Technion City , Haifa 3200003 , Israel
| | - Ofer Reany
- Department of Natural Sciences , The Open University of Israel , Ra'anana 4353701 , Israel
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38
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Dhiman R, Pen S, Chandrakumar PK, Frankcombe TJ, Day AI. Glycoluril derived cucurbituril analogues and the emergence of the most recent example: tiarauril. Chem Commun (Camb) 2020; 56:2529-2537. [DOI: 10.1039/c9cc07233k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cucurbituril analogues can bear some of the chemical and physical characteristics of their parental origin and are derived wholly or in part from glycolurils (including homologues).
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Affiliation(s)
- Rajni Dhiman
- Chemistry
- School of Science
- University of New South Wales Canberra
- Australian Defence Force Academy
- Canberra
| | - Satyavisal Pen
- Chemistry
- School of Science
- University of New South Wales Canberra
- Australian Defence Force Academy
- Canberra
| | - Pradeep Kumar Chandrakumar
- Chemistry
- School of Science
- University of New South Wales Canberra
- Australian Defence Force Academy
- Canberra
| | - Terry J. Frankcombe
- Chemistry
- School of Science
- University of New South Wales Canberra
- Australian Defence Force Academy
- Canberra
| | - Anthony I. Day
- Chemistry
- School of Science
- University of New South Wales Canberra
- Australian Defence Force Academy
- Canberra
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39
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Cicolani RS, de Oliveira-Filho AGS, de L. Batista AP, Demets GJF. Formation of the non-classical interhalide anion [I2Cl]− in methyl-bambus[6]uril cavity. NEW J CHEM 2020. [DOI: 10.1039/c9nj05352b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Methyl-bambus[6]uril may form a variety of inclusion compounds, especially with anionic species. Uncommon interhalide species may be produced in its cavity.
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Affiliation(s)
- Renato S. Cicolani
- Department of Chemistry
- Faculdade de Filosofia
- Ciências e Letras de Ribeirão Preto
- University of São Paulo
- Ribeirão Preto
| | | | - Ana Paula de L. Batista
- Department of Chemistry
- Faculdade de Filosofia
- Ciências e Letras de Ribeirão Preto
- University of São Paulo
- Ribeirão Preto
| | - Grégoire Jean-François Demets
- Department of Chemistry
- Faculdade de Filosofia
- Ciências e Letras de Ribeirão Preto
- University of São Paulo
- Ribeirão Preto
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40
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Kandrnálová M, Kokan Z, Havel V, Nečas M, Šindelář V. Hypervalent Iodine Based Reversible Covalent Bond in Rotaxane Synthesis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908953] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Markéta Kandrnálová
- Department of Chemistry and RECETOXFaculty of ScienceMasaryk University Kamenice 5 625 00 Brno Czech Republic
| | - Zoran Kokan
- Department of Chemistry and RECETOXFaculty of ScienceMasaryk University Kamenice 5 625 00 Brno Czech Republic
| | - Václav Havel
- Department of Chemistry and RECETOXFaculty of ScienceMasaryk University Kamenice 5 625 00 Brno Czech Republic
| | - Marek Nečas
- Department of Chemistry and RECETOXFaculty of ScienceMasaryk University Kamenice 5 625 00 Brno Czech Republic
| | - Vladimír Šindelář
- Department of Chemistry and RECETOXFaculty of ScienceMasaryk University Kamenice 5 625 00 Brno Czech Republic
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41
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Kandrnálová M, Kokan Z, Havel V, Nečas M, Šindelář V. Hypervalent Iodine Based Reversible Covalent Bond in Rotaxane Synthesis. Angew Chem Int Ed Engl 2019; 58:18182-18185. [PMID: 31587433 DOI: 10.1002/anie.201908953] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Indexed: 12/20/2022]
Abstract
Reversible covalent bonds play a significant role in achieving the high-yielding synthesis of mechanically interlocked molecules. Still, only a handful of such bonds have been successfully employed in synthetic procedures. Herein, we introduce a novel approach for the fast and simple preparation of interlocked molecules, combining the dynamic bond character of bis(acyloxy)iodate(I) anions with macrocyclic bambusuril anion receptors. The proof of principle was demonstrated on rotaxane synthesis, with near-quantitative yields observed in both the classical and "in situ" approach. The rotaxane formation was confirmed in the solid-state and solution by the X-ray and NMR studies. Our novel approach could be utilized in the fields of dynamic combinatorial chemistry, supramolecular polymers, or molecular machines, as well inspire further research on molecules that exhibit dynamic behavior, but owing to their high reactivity, have not been considered as constituents of more elaborate supramolecular structures.
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Affiliation(s)
- Markéta Kandrnálová
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Zoran Kokan
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Václav Havel
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Marek Nečas
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Vladimír Šindelář
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
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42
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Jašíková L, Rodrigues M, Lapešová J, Lízal T, Šindelář V, Roithová J. Bambusurils as a mechanistic tool for probing anion effects. Faraday Discuss 2019; 220:58-70. [PMID: 31503271 PMCID: PMC8609304 DOI: 10.1039/c9fd00038k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Bambusuril macrocycles have high affinity towards anions (X−) such as PF6− and SbF6− or BF4− and ClO4−. Therefore, addition of bambusurils to reaction mixtures containing these anions effectively removes the free anions from the reaction process. Hence, comparing reactions with and without addition of bambusurils can demonstrate whether the anions actively participate in the reaction mechanism or not. We show this approach for gold(i) mediated addition of methanol to an alkyne. The reaction mechanism can proceed via monoaurated intermediates (e.g., in catalysis with [(IPr)AuX]) or via diaurated intermediates (e.g., in catalysis with [(PPh3)AuX]). We show that anions X− slightly affect the reaction rates, however the effect stays almost the same even after their encapsulation in the cavity of bambusurils. We also demonstrate that X− affects the overall reaction rate in the very same way as the reaction rate of the protodeauration step. All results are consistent with the indirect effect of X− by the acidity of the conjugated acid HX on the rate-determining step. There is no evidence that a direct involvement of X− would affect the reaction rate. We present bambusurils, macrocycles which strongly bind anions of different sizes, as a mechanistic tool to probe counter ion effects in metal catalysis.![]()
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Affiliation(s)
- Lucie Jašíková
- Faculty of Science, Charles University in Prague, Hlavova 2030, 12843 Prague 6, Czech Republic
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43
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Mondal P, Solel E, Fridman N, Keinan E, Reany O. Intramolecular van der Waals Interactions Challenge Anion Binding in perthio-Bambusurils. Chemistry 2019; 25:13336-13343. [PMID: 31269313 DOI: 10.1002/chem.201901822] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 06/27/2019] [Indexed: 11/09/2022]
Abstract
Bambusurils (BUs) are known to be rigid cavitands that feature an extended, jigger-like conformation, and the BU[6]s strongly bind anions within their hydrophobic cavity. These features are not necessarily shared by the family of perthio-BUs. This study reveals that perthio-BUs assume a compact conformation and perthio-BU[6]s are poor anion binders, crystallizing as anion-free species from solutions containing halide salts. Computational studies show that the equatorial sulfur atoms compete against guest anions for binding with the glycoluril methine groups via strong van der Waals (vdW) attractive interactions. These competitive contacts not only account for the diminished anion-binding of perthio-BUs, but also explain their compact conformation. The semithio- and perthio-BU[4]s form linear coordination polymers with HgII in the solid-state regardless of their intrinsic molecular conformation. The strong involvement of sulfur atoms in intramolecular interactions differentiates the equatorial from the axial (peripheral) heteroatoms, thus offering chemoselective and regioselective transformations.
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Affiliation(s)
- Pravat Mondal
- Department of Natural Sciences, The Open University of Israel, 1 University road, P.O. Box 808, Ra'anana, 4353701, Israel
| | - Ephrath Solel
- Schulich Faculty of Chemistry, Technion: Israel Institute of Technology, Technion city, Haifa, 3200001, Israel
| | - Natalia Fridman
- Schulich Faculty of Chemistry, Technion: Israel Institute of Technology, Technion city, Haifa, 3200001, Israel
| | - Ehud Keinan
- Schulich Faculty of Chemistry, Technion: Israel Institute of Technology, Technion city, Haifa, 3200001, Israel
| | - Ofer Reany
- Department of Natural Sciences, The Open University of Israel, 1 University road, P.O. Box 808, Ra'anana, 4353701, Israel
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44
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Lízal T, Šindelář V. Bambusuril analogs based on alternating glycoluril and xylylene units. Beilstein J Org Chem 2019; 15:1268-1274. [PMID: 31293674 PMCID: PMC6604679 DOI: 10.3762/bjoc.15.124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 05/29/2019] [Indexed: 11/23/2022] Open
Abstract
The glycoluril monomer is a popular building block in supramolecular chemistry as it is used for the synthesis of versatile host molecules which can interact with cationic, anionic or neutral guest molecules. Here we present the design and synthesis of a new hybrid macrocycle containing glycoluril and aromatic units. The reaction afforded a mixture of macrocyclic homologues from which a two-membered macrocycle was isolated as the main product. Two disastereomers of the macrocycle were separated and characterized by means of NMR spectroscopy and X-ray crystallography. Conformational changes of these diastereomers were investigated using DFT models and variable-temperature NMR.
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Affiliation(s)
- Tomáš Lízal
- Department of Chemistry and RECETOX, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Vladimír Šindelář
- Department of Chemistry and RECETOX, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
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45
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Xue W, Zavalij PY, Isaacs L. Triazole functionalized acyclic cucurbit[n]uril-type receptors: host·guest recognition properties. Org Biomol Chem 2019; 17:5561-5569. [PMID: 31112196 PMCID: PMC6572757 DOI: 10.1039/c9ob00906j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We report the synthesis of three new triazole functionalized acyclic CB[n]-type receptors (2-4) by click chemistry. The compounds have good solubility in water (≥8 mM) and do not undergo strong self-association (Ks ≤ 903 M-1). We measured the binding constants of 2-4 toward guests 9-24 and compared the results to those obtained for the prototypical acyclic CB[n]-type receptor 1. The X-ray crystal structure of 4 is also described.
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Affiliation(s)
- Weijian Xue
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA.
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46
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Chandrakumar PK, Dhiman R, Woodward CE, Iranmanesh H, Beves JE, Day AI. Tiara[ n]uril: A Glycoluril-Based Macrocyclic Host with Cationic Walls. J Org Chem 2019; 84:3826-3831. [PMID: 30813724 DOI: 10.1021/acs.joc.8b02913] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The synthesis of new cationic macrocyclic host molecules is described. These macrocycles are comprised of glycoluril oligomers linked to two pyrazolium groups, which form part of a cationic wall facing into their cavities. A number of derivatives have been prepared with an objective to increasing the cavity size, and each new product has been fully characterized. Preliminary investigations of p Kas of Me10Tu[3]2+ and an interaction of L-glutamine indicate a potential for binding anionic molecules that also carry H-bond donor groups.
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Affiliation(s)
- Pradeep Kumar Chandrakumar
- Chemistry, School of PEMS , University of New South Wales Canberra, Australian Defence Force Academy , Canberra , Australian Capital Territory 2600 , Australia
| | - Rajni Dhiman
- Chemistry, School of PEMS , University of New South Wales Canberra, Australian Defence Force Academy , Canberra , Australian Capital Territory 2600 , Australia
| | - Clifford E Woodward
- Chemistry, School of PEMS , University of New South Wales Canberra, Australian Defence Force Academy , Canberra , Australian Capital Territory 2600 , Australia
| | - Hasti Iranmanesh
- School of Chemistry , UNSW Sydney , Sydney , 2052 New South Wales , Australia
| | - Jonathon E Beves
- School of Chemistry , UNSW Sydney , Sydney , 2052 New South Wales , Australia
| | - Anthony I Day
- Chemistry, School of PEMS , University of New South Wales Canberra, Australian Defence Force Academy , Canberra , Australian Capital Territory 2600 , Australia
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47
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Kaabel S, Stein RS, Fomitšenko M, Järving I, Friščić T, Aav R. Size-Control by Anion Templating in Mechanochemical Synthesis of Hemicucurbiturils in the Solid State. Angew Chem Int Ed Engl 2019; 58:6230-6234. [PMID: 30664335 DOI: 10.1002/anie.201813431] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Indexed: 12/22/2022]
Abstract
Self-organization is one of the most intriguing phenomena of chemical matter. While the self-assembly of macrocycles and cages in dilute solutions has been extensively studied, it remains poorly understood in solvent-free environments. Provided here is the first example of using anionic templates to achieve selective assembly of differently-sized macrocycles in a solvent-free system. Using acid-catalyzed synthesis of cyclohexanohemicucurbiturils as a model, size-controlled, quantitative synthesis of 6- or 8-membered macrocycles by spontaneous anion-directed reorganization of mechanochemically-made oligomers in the solid state is demonstrated.
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Affiliation(s)
- Sandra Kaabel
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia.,Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC, H3A 0B8, Canada
| | - Robin S Stein
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC, H3A 0B8, Canada
| | - Maria Fomitšenko
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Ivar Järving
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Tomislav Friščić
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montreal, QC, H3A 0B8, Canada
| | - Riina Aav
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
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48
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Kaabel S, Stein RS, Fomitšenko M, Järving I, Friščić T, Aav R. Size‐Control by Anion Templating in Mechanochemical Synthesis of Hemicucurbiturils in the Solid State. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201813431] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Sandra Kaabel
- Department of Chemistry and BiotechnologyTallinn University of Technology Akadeemia tee 15 12618 Tallinn Estonia
- Department of ChemistryMcGill University 801 Sherbrooke St. W. Montreal QC H3A 0B8 Canada
| | - Robin S. Stein
- Department of ChemistryMcGill University 801 Sherbrooke St. W. Montreal QC H3A 0B8 Canada
| | - Maria Fomitšenko
- Department of Chemistry and BiotechnologyTallinn University of Technology Akadeemia tee 15 12618 Tallinn Estonia
| | - Ivar Järving
- Department of Chemistry and BiotechnologyTallinn University of Technology Akadeemia tee 15 12618 Tallinn Estonia
| | - Tomislav Friščić
- Department of ChemistryMcGill University 801 Sherbrooke St. W. Montreal QC H3A 0B8 Canada
| | - Riina Aav
- Department of Chemistry and BiotechnologyTallinn University of Technology Akadeemia tee 15 12618 Tallinn Estonia
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49
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Valkenier H, Akrawi O, Jurček P, Sleziaková K, Lízal T, Bartik K, Šindelář V. Fluorinated Bambusurils as Highly Effective and Selective Transmembrane Cl−/HCO3− Antiporters. Chem 2019. [DOI: 10.1016/j.chempr.2018.11.008] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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50
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Abstract
GEST NMR provides dynamic information on host–guest systems. It allows signal amplification of low concentrated complexes, detection of intermolecular interactions and quantification of guest exchange rates.
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Affiliation(s)
- Liat Avram
- Faculty of Chemistry
- Weizmann Institute of Science
- 7610001 Rehovot
- Israel
| | - Amnon Bar-Shir
- Faculty of Chemistry
- Weizmann Institute of Science
- 7610001 Rehovot
- Israel
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