1
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Del Regno R, Palmieri A, Della Sala P, Talotta C, De Rosa M, Campanile G, Argenio C, Gaeta C. Thermodynamically Templated Macrocyclizations: Enhancing the Synthesis of Prism[5]arenes with Tailor-Made Guests. Org Lett 2024. [PMID: 39158014 DOI: 10.1021/acs.orglett.4c02590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/20/2024]
Abstract
The macrocyclization of 2,6-dialkoxynaphthalene monomers to prism[5]arenes is thermodynamically templated by DABCO cations. In this study, we demonstrate that a greater template affinity for prism[5]arene improves the macrocyclization yield. By using novel templating cations, the yield of alkoxy-prism[5]arenes increases significantly compared with those of previously reported procedures, while the purification process becomes easier and faster.
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Affiliation(s)
- Rocco Del Regno
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Anna Palmieri
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Paolo Della Sala
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Carmen Talotta
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Margherita De Rosa
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Giuseppa Campanile
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Claudia Argenio
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Carmine Gaeta
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
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2
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Rivero DS, Pérez-Pérez Y, Perretti MD, Santos T, Scoccia J, Tejedor D, Carrillo R. Kinetic Control of Complexity in Multiple Dynamic Libraries. Angew Chem Int Ed Engl 2024; 63:e202406654. [PMID: 38660925 DOI: 10.1002/anie.202406654] [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: 04/08/2024] [Revised: 04/22/2024] [Accepted: 04/24/2024] [Indexed: 04/26/2024]
Abstract
Multiple dynamic libraries of compounds are generated when more than one reversible reaction comes into play. Commonly, two or more orthogonal reversible reactions are used, leading to non-communicating dynamic libraries which share no building blocks. Only a few examples of communicating libraries have been reported, and in all those cases, building blocks are reversibly exchanged from one library to the other, constituting an antiparallel dynamic covalent system. Herein we report that communication between two different dynamic libraries through an irreversible process is also possible. Indeed, alkyl amines cancel the dynamic regime on the nucleophilic substitution of tetrazines, generating kinetically inert compounds. Interestingly, such amine can be part of another dynamic library, an imine-amine exchange. Thus, both libraries are interconnected with each other by an irreversible process which leads to kinetically inert structures that contain parts from both libraries, causing a collapse of the complexity. Additionally, a latent irreversible intercommunication could be developed. In such a way, a stable molecular system with specific host-guest and fluorescence properties, could be irreversibly transformed when the right stimulus was applied, triggering the cancellation of the original supramolecular and luminescent properties and the emergence of new ones.
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Affiliation(s)
- David S Rivero
- Instituto de Productos Naturales y Agrobiología (IPNA-CSIC), Avda. Astrofísico Fco. Sánchez 3, 38206, La Laguna, Spain
| | - Yaiza Pérez-Pérez
- Instituto de Productos Naturales y Agrobiología (IPNA-CSIC), Avda. Astrofísico Fco. Sánchez 3, 38206, La Laguna, Spain
| | - Marcelle D Perretti
- Instituto de Productos Naturales y Agrobiología (IPNA-CSIC), Avda. Astrofísico Fco. Sánchez 3, 38206, La Laguna, Spain
| | - Tanausú Santos
- Departamento de Química, Centro de Investigación en Síntesis Química, Universidad de La Rioja, 26006, Logroño, Spain
| | - Jimena Scoccia
- Instituto de Productos Naturales y Agrobiología (IPNA-CSIC), Avda. Astrofísico Fco. Sánchez 3, 38206, La Laguna, Spain
| | - David Tejedor
- Instituto de Productos Naturales y Agrobiología (IPNA-CSIC), Avda. Astrofísico Fco. Sánchez 3, 38206, La Laguna, Spain
| | - Romen Carrillo
- Instituto de Productos Naturales y Agrobiología (IPNA-CSIC), Avda. Astrofísico Fco. Sánchez 3, 38206, La Laguna, Spain
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3
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Yeung A, Zwijnenburg MA, Orton GRF, Robertson JH, Barendt TA. Investigating the diastereoselective synthesis of a macrocycle under Curtin-Hammett control. Chem Sci 2024; 15:5516-5524. [PMID: 38638241 PMCID: PMC11023033 DOI: 10.1039/d3sc05715a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 03/04/2024] [Indexed: 04/20/2024] Open
Abstract
This work sheds new light on the stereoselective synthesis of chiral macrocycles containing twisted aromatic units, valuable π-conjugated materials for recognition, sensing, and optoelectronics. For the first time, we use the Curtin-Hammett principle to investigate a chiral macrocyclisation reaction, revealing the potential for supramolecular π-π interactions to direct the outcome of a dynamic kinetic resolution, favouring the opposite macrocyclic product to that expected under reversible, thermodynamically controlled conditions. Specifically, a dynamic, racemic perylene diimide dye (1 : 1 P : M) is strapped with an enantiopure (S)-1,1'-bi-2-naphthol group (P-BINOL) to form two diastereomeric macrocyclic products, the homochiral macrocycle (PP) and the heterochiral species (PM). We find there is notable selectivity for the PM macrocycle (dr = 4 : 1), which is rationalised by kinetic templation from intramolecular aromatic non-covalent interactions between the P-BINOL π-donor and the M-PDI π-acceptor during the macrocyclisation reaction.
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Affiliation(s)
- Angus Yeung
- School of Chemistry, University of Birmingham Edgbaston Birmingham B15 2TT UK
| | - Martijn A Zwijnenburg
- Department of Chemistry, University College London 20 Gordon Street London WC1H 0AJ UK
| | - Georgia R F Orton
- School of Chemistry, University of Birmingham Edgbaston Birmingham B15 2TT UK
| | | | - Timothy A Barendt
- School of Chemistry, University of Birmingham Edgbaston Birmingham B15 2TT UK
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4
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Ibáñez S, Peris E. "Lock and Key" and "Induced-Fit" Host-Guest Models in Two Digold(I)-Based Metallotweezers. Inorg Chem 2023; 62:1820-1826. [PMID: 35360901 PMCID: PMC9974064 DOI: 10.1021/acs.inorgchem.2c00677] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Two different metallotweezers, each with two pyrene-imidazolylidene-gold(I) arms, were used as hosts for a series of planar aromatic guests. The metallotweezer with a dibenzoacridinebis(alkynyl) spacer (1) orients the two pyrene-imidazolylidene-gold(I) arms in a parallel disposition, with an interpanel distance of about 7 Å. The second metallotweezer (2) contains a carbazolylbis(alkynyl) spacer that directs the two pyrene panels in a diverging orientation. Determination of the association constants via 1H NMR titrations demonstrates that the binding strength shown by 1 is significantly larger than that found by 2, with binding affinities as large as 104 M-1 (in CDCl3), for the encapsulation of N,N'-dimethylnaphthalenetetracarboxydiimide with 1. The differences in the binding affinities are due to binding models associated with formation of the related host-guest complexes. While 1 operates via a "lock and key" model, in which the host does not suffer distortions upon formation of the inclusion complex, 2 operates via a guest-induced fit model. The large association constants shown by 1 with two planar guests were used for promotion of the template-directed synthesis of 1, which in the absence of an external template is produced in an equimolecular mixture with its self-aggregated congener, clippane [12]. This observation strongly suggests that the mechanically interlocked clippane is formed through a self-template-directed mechanism, while bonds are broken/formed during the synthetic protocol.
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Affiliation(s)
- Susana Ibáñez
- Institute
of Advanced Materials, Centro de Innovación en Química
Avanzada, Universitat Jaume I, Avenida Vicente Sos Baynat s/n, Castellón E-12071, Spain
| | - Eduardo Peris
- Institute
of Advanced Materials, Centro de Innovación en Química
Avanzada, Universitat Jaume I, Avenida Vicente Sos Baynat s/n, Castellón E-12071, Spain
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5
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Chao Y, Krishna A, Subramaniam M, Liang D, Pujari SP, Sue AC, Li G, Miloserdov FM, Zuilhof H. Sulfur-Phenolate Exchange: SuFEx-Derived Dynamic Covalent Reactions and Degradation of SuFEx Polymers. Angew Chem Int Ed Engl 2022; 61:e202207456. [PMID: 35819248 PMCID: PMC9540147 DOI: 10.1002/anie.202207456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Indexed: 11/15/2022]
Abstract
The products of the SuFEx reaction between sulfonimidoyl fluorides and phenols, sulfonimidates, are shown to display dynamic covalent chemistry with other phenols. This reaction was shown to be enantiospecific, finished in minutes at room temperature in high yields, and useful for both asymmetric synthesis and sustainable polymer production. Its wide scope further extends the usefulness of SuFEx and related click chemistries.
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Affiliation(s)
- Yang Chao
- School of Pharmaceutical Science and TechnologyTianjin University92 Weijin RoadTianjin300072China
| | - Akash Krishna
- School of Pharmaceutical Science and TechnologyTianjin University92 Weijin RoadTianjin300072China
| | - Muthusamy Subramaniam
- School of Pharmaceutical Science and TechnologyTianjin University92 Weijin RoadTianjin300072China
- Laboratory of Organic ChemistryWageningen UniversityStippeneng 46708WEWageningenThe Netherlands
| | - Dong‐Dong Liang
- Laboratory of Organic ChemistryWageningen UniversityStippeneng 46708WEWageningenThe Netherlands
- Department of ChemistryCapital Normal UniversityBeijing100048China
| | - Sidharam P. Pujari
- Laboratory of Organic ChemistryWageningen UniversityStippeneng 46708WEWageningenThe Netherlands
| | | | - Guanna Li
- Laboratory of Organic ChemistryWageningen UniversityStippeneng 46708WEWageningenThe Netherlands
- Biobased Chemistry and TechnologyWageningen UniversityBornse Weilanden 96708WGWageningenThe Netherlands
| | - Fedor M. Miloserdov
- Laboratory of Organic ChemistryWageningen UniversityStippeneng 46708WEWageningenThe Netherlands
| | - Han Zuilhof
- School of Pharmaceutical Science and TechnologyTianjin University92 Weijin RoadTianjin300072China
- Laboratory of Organic ChemistryWageningen UniversityStippeneng 46708WEWageningenThe Netherlands
- Department of Chemical and Materials EngineeringFaculty of EngineeringKing Abdulaziz University21589JeddahSaudi Arabia
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6
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Chao Y, Krishna A, Subramaniam M, Liang D, Pujari SP, Sue AC, Li G, Miloserdov FM, Zuilhof H. Sulfur–Phenolate Exchange: SuFEx‐Derived Dynamic Covalent Reactions and Degradation of SuFEx Polymers. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207456] [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)
- Yang Chao
- School of Pharmaceutical Science and Technology Tianjin University 92 Weijin Road Tianjin 300072 China
| | - Akash Krishna
- School of Pharmaceutical Science and Technology Tianjin University 92 Weijin Road Tianjin 300072 China
| | - Muthusamy Subramaniam
- School of Pharmaceutical Science and Technology Tianjin University 92 Weijin Road Tianjin 300072 China
- Laboratory of Organic Chemistry Wageningen University Stippeneng 4 6708WE Wageningen The Netherlands
| | - Dong‐Dong Liang
- Laboratory of Organic Chemistry Wageningen University Stippeneng 4 6708WE Wageningen The Netherlands
- Department of Chemistry Capital Normal University Beijing 100048 China
| | - Sidharam P. Pujari
- Laboratory of Organic Chemistry Wageningen University Stippeneng 4 6708WE Wageningen The Netherlands
| | | | - Guanna Li
- Laboratory of Organic Chemistry Wageningen University Stippeneng 4 6708WE Wageningen The Netherlands
- Biobased Chemistry and Technology Wageningen University Bornse Weilanden 9 6708WG Wageningen The Netherlands
| | - Fedor M. Miloserdov
- Laboratory of Organic Chemistry Wageningen University Stippeneng 4 6708WE Wageningen The Netherlands
| | - Han Zuilhof
- School of Pharmaceutical Science and Technology Tianjin University 92 Weijin Road Tianjin 300072 China
- Laboratory of Organic Chemistry Wageningen University Stippeneng 4 6708WE Wageningen The Netherlands
- Department of Chemical and Materials Engineering Faculty of Engineering King Abdulaziz University 21589 Jeddah Saudi Arabia
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7
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Orrillo AG, Furlan RLE. Sulfur in Dynamic Covalent Chemistry. Angew Chem Int Ed Engl 2022; 61:e202201168. [PMID: 35447003 DOI: 10.1002/anie.202201168] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Indexed: 12/21/2022]
Abstract
Sulfur has been important in dynamic covalent chemistry (DCC) since the beginning of the field. Mainly as part of disulfides and thioesters, dynamic sulfur-based bonds (DSBs) have a leading role in several remarkable reactions. Part of this success is due to the almost ideal properties of DSBs for the preparation of dynamic covalent systems, including high reactivity and good reversibility under mild aqueous conditions, the possibility of exploiting supramolecular interactions, access to isolable structures, and easy experimental control to turn the reaction on/off. DCC is currently witnessing an increase in the importance of DSBs. The chemical flexibility offered by DSBs opens the door to multiple applications. This Review presents an overview of all the DSBs used in DCC, their applications, and remarks on the interesting properties that they confer on dynamic chemical systems, especially those containing several DSBs.
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Affiliation(s)
- A Gastón Orrillo
- Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, CONICET, Suipacha 531, Rosario, S2002LRK, Argentina
| | - Ricardo L E Furlan
- Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, CONICET, Suipacha 531, Rosario, S2002LRK, Argentina
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8
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Caillaud K, Ladavière C. Water‐soluble (poly)acylhydrazones: Syntheses and Applications. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202200064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kilian Caillaud
- Univ Lyon, CNRS, UMR 5223, Ingénierie des Matériaux Polymères Université Claude Bernard Lyon1, INSA Lyon, Université Jean Monnet Villeurbanne Cédex F‐69622 France
| | - Catherine Ladavière
- Univ Lyon, CNRS, UMR 5223, Ingénierie des Matériaux Polymères Université Claude Bernard Lyon1, INSA Lyon, Université Jean Monnet Villeurbanne Cédex F‐69622 France
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9
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Orrillo AG, Furlan RLE. Sulfur in Dynamic Covalent Chemistry. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201168] [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)
- Alfredo Gastón Orrillo
- Universidad Nacional de Rosario Facultad de Ciencias Bioquimicas y Farmaceuticas Organic Chemistry Suipacha 530 2000 Rosario ARGENTINA
| | - Ricardo L. E. Furlan
- Universidad Nacional de Rosario Facultad de Ciencias Bioquimicas y Farmaceuticas Organic Chemistry Suipacha 530 2000 Rosario ARGENTINA
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10
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Selinger AJ, Cavallin NA, Yanai A, Birol I, Hof F. Template‐Directed Synthesis of Bivalent, Broad‐Spectrum Hosts for Neuromuscular Blocking Agents**. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202113235] [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)
- Allison J. Selinger
- Department of Chemistry University of Victoria 3800 Finnerty Rd. Victoria BC V8P 5C2 Canada
- Centre for Advanced Materials and Related Technology (CAMTEC) University of Victoria 3800 Finnerty Rd. Victoria BC V8W 2Y2 Canada
| | - Natalie A. Cavallin
- Department of Chemistry University of Victoria 3800 Finnerty Rd. Victoria BC V8P 5C2 Canada
- Centre for Advanced Materials and Related Technology (CAMTEC) University of Victoria 3800 Finnerty Rd. Victoria BC V8W 2Y2 Canada
| | - Anat Yanai
- Canada's Michael Smith Genome Sciences Centre BC Cancer Vancouver BC V5Z 4S6 Canada
| | - Inanc Birol
- Canada's Michael Smith Genome Sciences Centre BC Cancer Vancouver BC V5Z 4S6 Canada
- Department of Medical Genetics University of British Columbia Vancouver BC V6T 1Z3 Canada
| | - Fraser Hof
- Department of Chemistry University of Victoria 3800 Finnerty Rd. Victoria BC V8P 5C2 Canada
- Centre for Advanced Materials and Related Technology (CAMTEC) University of Victoria 3800 Finnerty Rd. Victoria BC V8W 2Y2 Canada
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11
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Selinger AJ, Cavallin NA, Yanai A, Birol I, Hof F. Template-Directed Synthesis of Bivalent, Broad-Spectrum Hosts for Neuromuscular Blocking Agents*. Angew Chem Int Ed Engl 2021; 61:e202113235. [PMID: 34889016 DOI: 10.1002/anie.202113235] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Indexed: 12/19/2022]
Abstract
We report on the synthesis of bivalent water-soluble calix[4]arene and calix[5]arene hosts, Super-sCx4 and Super-sCx5 as new broad-spectrum supramolecular binders of neuromuscular blocking agents (NMBAs). Synthesis was achieved using the target bisquaternary amine NMBAs as a template to link two highly anionic p-sulfonatocalixarene building blocks in aqueous solution. Bivalent anionic hosts Super-sCx4 and Super-sCx5 bind by engaging both quaternary amines present on a variety of NMBAs. We report low μM binding to structurally diverse alkyl, steroidal, curarine and benzylisoquinoline NMBAs with high selectivity over the neurotransmitter acetylcholine and a variety of other hydrophobic amines.
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Affiliation(s)
- Allison J Selinger
- Department of Chemistry, University of Victoria, 3800 Finnerty Rd., Victoria, BC V8P 5C2, Canada.,Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, 3800 Finnerty Rd., Victoria, BC V8W 2Y2, Canada
| | - Natalie A Cavallin
- Department of Chemistry, University of Victoria, 3800 Finnerty Rd., Victoria, BC V8P 5C2, Canada.,Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, 3800 Finnerty Rd., Victoria, BC V8W 2Y2, Canada
| | - Anat Yanai
- Canada's Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, BC V5Z 4S6, Canada
| | - Inanc Birol
- Canada's Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, BC V5Z 4S6, Canada.,Department of Medical Genetics, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Fraser Hof
- Department of Chemistry, University of Victoria, 3800 Finnerty Rd., Victoria, BC V8P 5C2, Canada.,Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, 3800 Finnerty Rd., Victoria, BC V8W 2Y2, Canada
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12
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Del Regno R, Della Sala P, Picariello D, Talotta C, Spinella A, Neri P, Gaeta C. per-Hydroxylated Prism[ n]arenes: Supramolecularly Assisted Demethylation of Methoxy-Prism[5]arene. Org Lett 2021; 23:8143-8146. [PMID: 34633199 PMCID: PMC8576831 DOI: 10.1021/acs.orglett.1c02800] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Methoxy-prism[5]arene PrS[5]Me is demethylated
by a supramolecularly assisted reaction.
In the presence of a tetramethylammonium cation, PrS[5]Me is demethylated by BBr3 in high yield, while in its absence a 55/40 mixture of PrS[5]OH/PrS[6]OH is formed. The dealkylation
of prismarenes, such as PrS[6]R (R = Et, nPr) and c-PrS[5]Me, can be easily obtained in high yields in the presence
of BBr3.
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Affiliation(s)
- Rocco Del Regno
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
| | - Paolo Della Sala
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
| | - Davide Picariello
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
| | - Carmen Talotta
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
| | - Aldo Spinella
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
| | - Placido Neri
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
| | - Carmine Gaeta
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy
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13
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Borodin O, Shchukin Y, Robertson CC, Richter S, von Delius M. Self-Assembly of Stimuli-Responsive [2]Rotaxanes by Amidinium Exchange. J Am Chem Soc 2021; 143:16448-16457. [PMID: 34559523 PMCID: PMC8517971 DOI: 10.1021/jacs.1c05230] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Indexed: 01/29/2023]
Abstract
Advances in supramolecular chemistry are often underpinned by the development of fundamental building blocks and methods enabling their interconversion. In this work, we report the use of an underexplored dynamic covalent reaction for the synthesis of stimuli-responsive [2]rotaxanes. The formamidinium moiety lies at the heart of these mechanically interlocked architectures, because it enables both dynamic covalent exchange and the binding of simple crown ethers. We demonstrated that the rotaxane self-assembly follows a unique reaction pathway and that the complex interplay between crown ether and thread can be controlled in a transient fashion by addition of base and fuel acid. Dynamic combinatorial libraries, when exposed to diverse nucleophiles, revealed a profound stabilizing effect of the mechanical bond as well as intriguing reactivity differences between seemingly similar [2]rotaxanes.
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Affiliation(s)
- Oleg Borodin
- Institute
of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Yevhenii Shchukin
- Institute
of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Craig C. Robertson
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K.
| | - Stefan Richter
- Institute
of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Max von Delius
- Institute
of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
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14
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Della Sala P, Del Regno R, Di Marino L, Calabrese C, Palo C, Talotta C, Geremia S, Hickey N, Capobianco A, Neri P, Gaeta C. An intramolecularly self-templated synthesis of macrocycles: self-filling effects on the formation of prismarenes. Chem Sci 2021; 12:9952-9961. [PMID: 34349965 PMCID: PMC8317625 DOI: 10.1039/d1sc02199k] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 06/02/2021] [Indexed: 12/18/2022] Open
Abstract
Ethyl- and propyl-prism[6]arenes are obtained in high yields and in short reaction times, independent of the nature and size of the solvent, in the cyclization of 2,6-dialkoxynaphthalene with paraformaldehyde. PrS[6]Et or PrS[6]nPr adopt, both in solution and in the solid state, a folded cuboid-shaped conformation, in which four inward oriented alkyl chains fill the cavity of the macrocycle. On these bases, we proposed that the cyclization of PrS[6]Et or PrS[6]nPr occurs through an intramolecular thermodynamic self-templating effect. In other words, the self-filling of the internal cavity of PrS[6]Et or PrS[6]nPr stabilizes their cuboid structure, driving the equilibrium toward their formation. Molecular recognition studies, both in solution and in the solid state, show that the introduction of guests into the macrocycle cavity forces the cuboid scaffold to open, through an induced-fit mechanism. An analogous conformational change from a closed to an open state occurs during the endo-cavity complexation process of the pentamer, PrS[5]. These results represent a rare example of a thermodynamically controlled cyclization process driven through an intramolecular self-template effect, which could be exploited in the synthesis of novel macrocycles.
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Affiliation(s)
- Paolo Della Sala
- Dipartimento di Chimica e Biologia, "A. Zambelli" Università di Salerno Via Giovanni Paolo II I-84084 Fisciano Italy
| | - Rocco Del Regno
- Dipartimento di Chimica e Biologia, "A. Zambelli" Università di Salerno Via Giovanni Paolo II I-84084 Fisciano Italy
| | - Luca Di Marino
- Dipartimento di Chimica e Biologia, "A. Zambelli" Università di Salerno Via Giovanni Paolo II I-84084 Fisciano Italy
| | - Carmela Calabrese
- Dipartimento di Chimica e Biologia, "A. Zambelli" Università di Salerno Via Giovanni Paolo II I-84084 Fisciano Italy
| | - Carmine Palo
- Dipartimento di Chimica e Biologia, "A. Zambelli" Università di Salerno Via Giovanni Paolo II I-84084 Fisciano Italy
| | - Carmen Talotta
- Dipartimento di Chimica e Biologia, "A. Zambelli" Università di Salerno Via Giovanni Paolo II I-84084 Fisciano Italy
| | - Silvano Geremia
- Centro di Eccellenza in Biocristallografia, Dipartimento di Scienze Chimiche e Farmaceutiche Università di Trieste Via L. Giorgieri 1 I-34127 Trieste Italy
| | - Neal Hickey
- Centro di Eccellenza in Biocristallografia, Dipartimento di Scienze Chimiche e Farmaceutiche Università di Trieste Via L. Giorgieri 1 I-34127 Trieste Italy
| | - Amedeo Capobianco
- Dipartimento di Chimica e Biologia, "A. Zambelli" Università di Salerno Via Giovanni Paolo II I-84084 Fisciano Italy
| | - Placido Neri
- Dipartimento di Chimica e Biologia, "A. Zambelli" Università di Salerno Via Giovanni Paolo II I-84084 Fisciano Italy
| | - Carmine Gaeta
- Dipartimento di Chimica e Biologia, "A. Zambelli" Università di Salerno Via Giovanni Paolo II I-84084 Fisciano Italy
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15
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Dutta K, Kanjilal P, Das R, Thayumanavan S. Synergistic Interplay of Covalent and Non-Covalent Interactions in Reactive Polymer Nanoassembly Facilitates Intracellular Delivery of Antibodies. Angew Chem Int Ed Engl 2021; 60:1821-1830. [PMID: 33034131 PMCID: PMC7855684 DOI: 10.1002/anie.202010412] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/23/2020] [Indexed: 01/29/2023]
Abstract
The primary impediments in developing large antibodies as drugs against intracellular targets involve their low transfection efficiency and suitable reversible encapsulation strategies for intracellular delivery with retention of biological activity. To address this, we outline an electrostatics-enhanced covalent self-assembly strategy to generate polymer-protein/antibody nanoassemblies. Through structure-activity studies, we down-select the best performing self-immolative pentafluorophenyl containing activated carbonate polymer for bioconjugation. With the help of an electrostatics-aided covalent self-assembly approach, we demonstrate efficient encapsulation of medium to large proteins (HRP, 44 kDa and β-gal, 465 kDa) and antibodies (ca. 150 kDa). The designed polymeric nanoassemblies are shown to successfully traffic functional antibodies (anti-NPC and anti-pAkt) to cytosol to elicit their bioactivity towards binding intracellular protein epitopes and inducing apoptosis.
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Affiliation(s)
| | | | - Ritam Das
- University of Massachusetts, Amherst, MA, 01003, USA
| | - Sankaran Thayumanavan
- Department of Chemistry, Molecular and Cellular Biology Program, and The Center for Bioactive Delivery-Institute for Applied Life Sciences, University of Massachusetts, Amherst, MA, 01003, USA
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16
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Chen XY, Shen D, Cai K, Jiao Y, Wu H, Song B, Zhang L, Tan Y, Wang Y, Feng Y, Stern CL, Stoddart JF. Suit[3]ane. J Am Chem Soc 2020; 142:20152-20160. [PMID: 33180476 DOI: 10.1021/jacs.0c09896] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Suitanes are a class of mechanically interlocked molecules (MIMs) that consist of two components: a body with limbs protruding outward and a suit that fits appropriately around it, so that there is no easy way for the suit to be removed from the body. Herein, we report the synthesis and characterization of a suit[3]ane, which contains a benzotrithiophene derivative (THBTT) with three protruding hexyl chains as the body and a 3-fold symmetric, extended pyridinium-based cage, namely, HexaCage6+, as the suit. Central to its realization is effective templation, provided by THBTT during cage formation, an observation that has been supported by the strong binding constant between benzotrithiophene (BTT) and the empty cage. The solid-state structure of the suit[3]ane reveals that the body is confined within the suit's cavity with its alkyl chains protruding outward through the orifices in the cage. Notably, such a seemingly unstable molecule, having three flexible alkyl chains as its only protruding limbs, does not dissociate after prolonged heating in CD3CN at 100 °C under pressure for 7 days. No evidence for guest exchange with the host was observed at this temperature in a 2:1 mixture of THBTT and HexaCage6+ in CD3CN. The results indicate that flexible protruding limbs are sufficient for a suit[3]ane to remain mechanically stable even at high temperatures in solution.
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Affiliation(s)
- Xiao-Yang Chen
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Dengke Shen
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States.,Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China
| | - Kang Cai
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Yang Jiao
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Huang Wu
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Bo Song
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Long Zhang
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Yu Tan
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Yu Wang
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Yuanning Feng
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Charlotte L Stern
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - J Fraser Stoddart
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States.,School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
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17
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Dutta K, Kanjilal P, Das R, Thayumanavan S. Synergistic Interplay of Covalent and Non‐Covalent Interactions in Reactive Polymer Nanoassembly Facilitates Intracellular Delivery of Antibodies. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010412] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | - Ritam Das
- University of Massachusetts Amherst MA 01003 USA
| | - Sankaran Thayumanavan
- Department of Chemistry, Molecular and Cellular Biology Program, and The Center for Bioactive Delivery-Institute for Applied Life Sciences University of Massachusetts Amherst MA 01003 USA
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18
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Della Sala P, Del Regno R, Talotta C, Capobianco A, Hickey N, Geremia S, De Rosa M, Spinella A, Soriente A, Neri P, Gaeta C. Prismarenes: A New Class of Macrocyclic Hosts Obtained by Templation in a Thermodynamically Controlled Synthesis. J Am Chem Soc 2020; 142:1752-1756. [PMID: 31898458 PMCID: PMC7993634 DOI: 10.1021/jacs.9b12216] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
![]()
The novel title macrocycles, based
on methylene-bridged 1,5-naphthalene
units, have been obtained by template effect in a thermodynamically
controlled synthesis. In detail, the prism[5]arene 1 or
the prism[6]arene 3 was selectively removed from the
equilibrium mixture by using the complementary ammonium-templating
agent. When only the solvent 1,2-DCE was used, the 1,4-confused derivative 2 was obtained. The prism[5]arene here described shows a deep
π-electron-rich aromatic cavity that exhibits a great affinity
for the quaternary ammonium guests, originating from favorable cation···π
and +NC–H···π interactions.
This recognition motif is the basis of the templated synthesis of
the prism[n]arenes here reported.
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Affiliation(s)
- Paolo Della Sala
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia, "A. Zambelli" , Università di Salerno , Via Giovanni Paolo II 132 , I-84084 Fisciano ( SA ), Italy
| | - Rocco Del Regno
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia, "A. Zambelli" , Università di Salerno , Via Giovanni Paolo II 132 , I-84084 Fisciano ( SA ), Italy
| | - Carmen Talotta
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia, "A. Zambelli" , Università di Salerno , Via Giovanni Paolo II 132 , I-84084 Fisciano ( SA ), Italy
| | - Amedeo Capobianco
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia, "A. Zambelli" , Università di Salerno , Via Giovanni Paolo II 132 , I-84084 Fisciano ( SA ), Italy
| | - Neal Hickey
- Centro di Eccellenza in Biocristallografia, Dipartimento di Scienze Chimiche e Farmaceutiche , Università di Trieste , Via L. Giorgieri 1 , I-34127 Trieste , Italy
| | - Silvano Geremia
- Centro di Eccellenza in Biocristallografia, Dipartimento di Scienze Chimiche e Farmaceutiche , Università di Trieste , Via L. Giorgieri 1 , I-34127 Trieste , Italy
| | - Margherita De Rosa
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia, "A. Zambelli" , Università di Salerno , Via Giovanni Paolo II 132 , I-84084 Fisciano ( SA ), Italy
| | - Aldo Spinella
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia, "A. Zambelli" , Università di Salerno , Via Giovanni Paolo II 132 , I-84084 Fisciano ( SA ), Italy
| | - Annunziata Soriente
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia, "A. Zambelli" , Università di Salerno , Via Giovanni Paolo II 132 , I-84084 Fisciano ( SA ), Italy
| | - Placido Neri
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia, "A. Zambelli" , Università di Salerno , Via Giovanni Paolo II 132 , I-84084 Fisciano ( SA ), Italy
| | - Carmine Gaeta
- Laboratory of Supramolecular Chemistry, Dipartimento di Chimica e Biologia, "A. Zambelli" , Università di Salerno , Via Giovanni Paolo II 132 , I-84084 Fisciano ( SA ), Italy
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19
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Solà J, Jimeno C, Alfonso I. Exploiting complexity to implement function in chemical systems. Chem Commun (Camb) 2020; 56:13273-13286. [DOI: 10.1039/d0cc04170j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This feature article reflects a personal overview of the importance of complexity as an additional parameter to be considered in chemical research, being illustrated with selected examples in molecular recognition and catalysis.
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Affiliation(s)
- Jordi Solà
- Department of Biological Chemistry
- Institute of Advanced Chemistry of Catalonia
- IQAC-CSIC
- 08034 Barcelona
- Spain
| | - Ciril Jimeno
- Department of Biological Chemistry
- Institute of Advanced Chemistry of Catalonia
- IQAC-CSIC
- 08034 Barcelona
- Spain
| | - Ignacio Alfonso
- Department of Biological Chemistry
- Institute of Advanced Chemistry of Catalonia
- IQAC-CSIC
- 08034 Barcelona
- Spain
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20
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Núñez-Villanueva D, Hunter CA. Molecular replication using covalent base-pairs with traceless linkers. Org Biomol Chem 2019; 17:9660-9665. [PMID: 31691702 DOI: 10.1039/c9ob02336d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A unique feature of kinetically inert covalent base-pairing is that the nature of the chemical information that is transferred can be modulated by changing the chemical connectivity between the two bases. Formation of esters between phenols and benzoic acids has been used as a base-pairing strategy for sequence information transfer in template-directed synthesis of linear oligomers, but the copy strand produced by this process has the complementary sequence to the template strand. It is possible to form a base-pair between two benzoic acids by using a hydroquinone linker, which is eliminated when the product duplex is hydrolysed. Using this approach, covalent template-directed synthesis was carried out using a benzoic acid 3-mer template to produce an identical copy. This direct replication process was used in iterative rounds of replication leading to an increase of the population of the copied oligomer.
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Affiliation(s)
- Diego Núñez-Villanueva
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.
| | - Christopher A Hunter
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.
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21
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Núñez-Villanueva D, Ciaccia M, Iadevaia G, Sanna E, Hunter CA. Sequence information transfer using covalent template-directed synthesis. Chem Sci 2019; 10:5258-5266. [PMID: 31191881 PMCID: PMC6540929 DOI: 10.1039/c9sc01460h] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 04/22/2019] [Indexed: 12/14/2022] Open
Abstract
Kinetically inert ester bonds were used to attach monomers to a template, dictating the sequence of the polymer product.
Template-directed synthesis is the biological method for the assembly of oligomers of defined sequence, providing the molecular basis for replication and the process of evolution. To apply analogous processes to synthetic oligomeric molecules, methods are required for the transfer of sequence information from a template to a daughter strand. We show that covalent template-directed synthesis is a promising approach for the molecular replication of sequence information in synthetic oligomers. Two monomer building blocks were synthesized: a phenol monomer and a benzoic acid monomer, each bearing an alkyne and an azide for oligomerization via copper catalyzed azide alkyne cycloaddition (CuAAC) reactions. Stepwise synthesis was used to prepare oligomers, where information was encoded as the sequence of phenol (P) and benzoic acid (A) units. Ester base-pairing was used to attach monomers to a mixed sequence template, and CuAAC was used to zip up the backbone. Hydrolysis of the ester base-pairs gave back the starting template and the sequence complementary copy. When the AAP trimer was used as the template, the complementary sequence PPA was obtained as the major product, with a small amount of scrambling resulting in PAP as a side-product. This covalent base-pairing strategy represents a general approach that can be implemented in different formats for the replication of sequence information in synthetic oligomers.
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Affiliation(s)
- Diego Núñez-Villanueva
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
| | - Maria Ciaccia
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
| | - Giulia Iadevaia
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
| | - Elena Sanna
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
| | - Christopher A Hunter
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
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22
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Orrillo AG, Escalante AM, Martinez-Amezaga M, Cabezudo I, Furlan RLE. Molecular Networks in Dynamic Multilevel Systems. Chemistry 2018; 25:1118-1127. [DOI: 10.1002/chem.201804143] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 09/17/2018] [Indexed: 11/07/2022]
Affiliation(s)
- A. Gastón Orrillo
- Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas; Universidad Nacional de Rosario-CONICET; S2002LRK Rosario Argentina
| | - Andrea M. Escalante
- Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas; Universidad Nacional de Rosario-CONICET; S2002LRK Rosario Argentina
| | - Maitena Martinez-Amezaga
- Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas; Universidad Nacional de Rosario-CONICET; S2002LRK Rosario Argentina
| | - Ignacio Cabezudo
- Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas; Universidad Nacional de Rosario-CONICET; S2002LRK Rosario Argentina
| | - Ricardo L. E. Furlan
- Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas; Universidad Nacional de Rosario-CONICET; S2002LRK Rosario Argentina
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23
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Batiste SM, Johnston JN. Evidence for Ion-Templation During Macrocyclooligomerization of Depsipeptides. J Am Chem Soc 2018; 140:4560-4568. [PMID: 29565576 PMCID: PMC5996984 DOI: 10.1021/jacs.7b13148] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The ion-mediated Mitsunobu macrocyclooligomerization (M-MCO) reaction of hydroxy acid depsipeptides provides small collections of cyclic depsipeptides with good mass recovery. The approach can produce good yields of a single macrocycle or provide rapid access to multiple oligomeric macrocycles in good overall yield. While Lewis acidic alkali metal salts are known to play a role in the outcome of MCO reactions, it is unclear whether their effect is due to an organizational (e.g., templating) mechanism. Isothermal titration calorimetry (ITC) was used to study macrocycle-metal ion binding interactions, and this report correlates these thermodynamic measurements to the (kinetically determined) size distributions of depsipeptides formed during a Mitsunobu-based macrocyclooligomerization (MCO). Key trends have been identified in quantitative metal ion-cyclic depsipeptide binding affinity ( Ka), enthalpy of binding (Δ H), and stoichiometry of complexation across discrete series of macrocycles, and they provide the first analytical platform to rationally select a metal-ion template for a targeted size regime of cyclic oligomeric depsipeptides.
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Affiliation(s)
- Suzanne M Batiste
- Department of Chemistry and Vanderbilt Institute of Chemical Biology , Vanderbilt University , Nashville , Tennessee 37235-1822 , United States
| | - Jeffrey N Johnston
- Department of Chemistry and Vanderbilt Institute of Chemical Biology , Vanderbilt University , Nashville , Tennessee 37235-1822 , United States
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24
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Zhang L, Duan P, Liu Y, Sun J, Zhao D, Du C. Anion-directed assembly of lanthanide coordination polymers with SMMs properties based on a dihydrazone ligand. Z KRIST-CRYST MATER 2017. [DOI: 10.1515/zkri-2017-2076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Four new Ln(III)-based coordination polymers (CPs), [Eu(HL)Cl2(DMF)2]·(H2L) (1), [Dy(HL)Cl2(DMF)2]·(H2L) (2), [Er(HL)Cl2(DMF)(CH3OH)]·(DMF) (3) and [Yb(HL)Cl2(DMF)(H2O)]·(DMF) (4) (H2L=2,6-bis[(3-methoxysalicylidene)hydrazinocarbonyl]pyridine) have been synthesized through the reaction of Ln(III) chloride and H2L by using the vapour diffusion method. Interestingly, Cl− as a template agent plays a vital role in the formation of the target complexes. Single-crystal X-ray diffraction studies indicate that 1 and 2 are isostructural and crystallize in triclinic space group P1̅, while complexes 3 and 4 are isostructural and crystallize in monoclinic space group C2/c. Variable temperature magnetization measurement (χ
M
T–T) demonstrates possible antiferromagnetic interactions in complex 2. Alternating-current (ac) susceptibility measurement furthermore indicated frequency dependence for both the in-phase (χ′) and out-of-phase (χ″) components in 2, suggesting that there is a slow relaxation behavior of the magnetization, which is typical of single-molecule magnets (SMMs). This is the first time that Ln(III) CPs based on such a dihydrazone ligand has been reported so far.
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Affiliation(s)
- Lina Zhang
- College of Chemistry and Chemical Engineering , Henan Polytechnic University , Jiaozuo 454000 , P.R. China
- College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou 450052 , P.R. China
| | - Peigao Duan
- College of Chemistry and Chemical Engineering , Henan Polytechnic University , Jiaozuo 454000 , P.R. China
| | - Yang Liu
- College of Materials Science and Engineering , Henan Polytechnic University , Jiaozuo 454000 , P.R. China
| | - Jingxian Sun
- College of Materials Science and Engineering , Henan Polytechnic University , Jiaozuo 454000 , P.R. China
| | - Dan Zhao
- College of Chemistry and Chemical Engineering , Henan Polytechnic University , Jiaozuo 454000 , P.R. China
| | - Chenxia Du
- College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou 450052 , P.R. China
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25
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Komáromy D, Stuart MCA, Monreal Santiago G, Tezcan M, Krasnikov VV, Otto S. Self-Assembly Can Direct Dynamic Covalent Bond Formation toward Diversity or Specificity. J Am Chem Soc 2017; 139:6234-6241. [PMID: 28398730 PMCID: PMC5423079 DOI: 10.1021/jacs.7b01814] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
![]()
With
the advent of reversible covalent chemistry the study of the
interplay between covalent bond formation and noncovalent interactions
has become increasingly relevant. Here we report that the interplay
between reversible disulfide chemistry and self-assembly can give
rise either to molecular diversity, i.e., the emergence of a unprecedentedly
large range of macrocycles or to molecular specificity, i.e., the
autocatalytic emergence of a single species. The two phenomena are
the result of two different modes of self-assembly, demonstrating
that control over self-assembly pathways can enable control over covalent
bond formation.
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Affiliation(s)
- Dávid Komáromy
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Marc C A Stuart
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Guillermo Monreal Santiago
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Meniz Tezcan
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Victor V Krasnikov
- Zernike Institute for Advanced Materials, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Sijbren Otto
- Centre for Systems Chemistry, Stratingh Institute, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
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26
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Dou XQ, Feng CL. Amino Acids and Peptide-Based Supramolecular Hydrogels for Three-Dimensional Cell Culture. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1604062. [PMID: 28112836 DOI: 10.1002/adma.201604062] [Citation(s) in RCA: 231] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 10/16/2016] [Indexed: 05/18/2023]
Abstract
Supramolecular hydrogels assembled from amino acids and peptide-derived hydrogelators have shown great potential as biomimetic three-dimensional (3D) extracellular matrices because of their merits over conventional polymeric hydrogels, such as non-covalent or physical interactions, controllable self-assembly, and biocompatibility. These merits enable hydrogels to be made not only by using external stimuli, but also under physiological conditions by rationally designing gelator structures, as well as in situ encapsulation of cells into hydrogels for 3D culture. This review will assess current progress in the preparation of amino acids and peptide-based hydrogels under various kinds of external stimuli, and in situ encapsulation of cells into the hydrogels, with a focus on understanding the associations between their structures, properties, and functions during cell culture, and the remaining challenges in this field. The amino acids and peptide-based hydrogelators with rationally designed structures have promising applications in the fields of regenerative medicine, tissue engineering, and pre-clinical evaluation.
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Affiliation(s)
- Xiao-Qiu Dou
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiaotong University, 800 Dongchuan Road., 200240, Shanghai, China
| | - Chuan-Liang Feng
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiaotong University, 800 Dongchuan Road., 200240, Shanghai, China
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27
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Galán A, Aragay G, Ballester P. A chiral "Siamese-Twin" calix[4]pyrrole tetramer. Chem Sci 2016; 7:5976-5982. [PMID: 30034738 PMCID: PMC6024643 DOI: 10.1039/c6sc01843b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 05/26/2016] [Indexed: 11/21/2022] Open
Abstract
We describe our results in the attempted template syntheses of oligomacrocycle calix[4]pyrrole dimer 4, using Hay coupling reaction conditions, tetraalkynyl calix[4]pyrrole 5 as starting material and two bipyridyl N-oxides of different length as templates. We found that the short bis-N-oxide 3 was not an efficient template for the macrocyclization reaction producing an insoluble crude reaction mixture containing exclusively oligomerization and polycondensation products. On the other hand, when we used the long bis-N-oxide 6 as template we obtained a soluble crude reaction mixture in which we did not detect the expected calix[4]pyrrole dimer 4. Instead, we isolated, in low yield, an encapsulation complex of the bis-N-oxide 6 in a partially reacted calix[4]pyrrole dimer. The major isolated species was an unprecedented calix[4]pyrrole tetramer encapsulating two molecules of 6. The complex adopted a chiral helical-like conformation in the solid state resembling the previously described so-called "Siamese-Twin porphyrins".
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Affiliation(s)
- Albano Galán
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avgda. Països Catalans 16 , 43007 , Tarragona , Spain .
| | - Gemma Aragay
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avgda. Països Catalans 16 , 43007 , Tarragona , Spain .
| | - Pablo Ballester
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avgda. Països Catalans 16 , 43007 , Tarragona , Spain .
- Institution for Research and Advanced Studies (ICREA) , Passeig Lluís Companys, 23 , 08018 Barcelona , Spain
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28
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Kang P, Jung S, Lee J, Kang HJ, Lee H, Choi MG. Anion induced structural transformation in silver-(3,6-dimethoxy-1,2,4,5-tetrazine) coordination polymers under mechanochemical conditions. Dalton Trans 2016; 45:11949-52. [DOI: 10.1039/c6dt01834c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mechanochemical processes allow the 1D chain of [Ag(dmotz)(CF3SO3)]n to easily convert to a 2D grid network of {[Ag(dmotz)2](ClO4)}n in the presence of [ClO4]−.
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Affiliation(s)
- Philjae Kang
- Department of Chemistry
- Yonsei University
- Seoul
- Korea
| | - Sooyong Jung
- Department of Chemistry
- Yonsei University
- Seoul
- Korea
| | - Junhyung Lee
- Department of Chemistry
- Yonsei University
- Seoul
- Korea
| | - Hye Ji Kang
- Department of Chemistry
- Yonsei University
- Seoul
- Korea
| | - Hyehee Lee
- Department of Chemistry
- Yonsei University
- Seoul
- Korea
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29
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Singh AS, Sun SS. Structurally Flexible C₃-Symmetric Receptors for Molecular Recognition and Their Self-Assembly Properties. CHEM REC 2015. [PMID: 26202256 DOI: 10.1002/tcr.201500021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The bioinspired design and synthesis of building blocks and their assemblies by the supramolecular approach has ever fascinated scientists to utilize such artificial systems for numerous purposes. Flexibility is a basic feature of natural systems. However, in artificial systems this is difficult to control, especially if there is no preorganization of the component(s) of a system. We have designed and synthesized a series of C3 -symmetric N-bridged flexible receptors and successfully utilized them to selectively entrap the notorious and toxic nitrate anion in aqueous medium. This was the first report of highest binding affinity for the nitrate anion in aqueous medium. An impressive self-sorting phenomenon of reversibly formed hydrogen-bonded capsules, which self-assembled from flexible tripodal receptors having branches of similar size and bearing the same amide functionality, has been disclosed. Encapsulated nitrate anion has been further utilized for the photochemical [2+2] cycloaddition reaction for the synthesis of strained four-membered ring structures through dynamic self-assembly. In this Personal Account, we summarize these results showing the utility of naturally inspired flexibility in artificial systems.
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Affiliation(s)
- Ashutosh S Singh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Institute of Physics Campus, Sachivalaya Marg, Near Sainik School, Bhubaneswar, 751005, India
| | - Shih-Sheng Sun
- Institute of Chemistry, Academia Sinica, 115 Nankang, Taipei, Taiwan.
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30
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Wilson EA, Vermeulen NA, McGonigal PR, Avestro AJ, Sarjeant AA, Stern CL, Stoddart JF. Formation of a hetero[3]rotaxane by a dynamic component-swapping strategy. Chem Commun (Camb) 2015; 50:9665-8. [PMID: 25019588 DOI: 10.1039/c4cc03612c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Acid-catalysed scrambling of the mechanically interlocked components between two different homo[3]rotaxanes, constituted of dumbbells containing two secondary dialkylammonium ion recognition sites encircled by two [24]crown-8 rings, each containing a couple of imine bonds, affords a statistical mixture of a hetero[3]rotaxane along with the two homo[3]rotaxanes, indicating that neither selectivity nor cooperativity is operating during the assembly process.
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Affiliation(s)
- Eleanor A Wilson
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3113, USA.
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31
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López-Vidal EM, García MD, Peinador C, Quintela JM. When Self-Assembly Fails: Stepwise Metal-Directed Synthesis of [2]Catenanes. Chemistry 2014; 21:2259-67. [DOI: 10.1002/chem.201405297] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Indexed: 11/06/2022]
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32
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Herrmann A. Dynamic combinatorial/covalent chemistry: a tool to read, generate and modulate the bioactivity of compounds and compound mixtures. Chem Soc Rev 2014; 43:1899-933. [PMID: 24296754 DOI: 10.1039/c3cs60336a] [Citation(s) in RCA: 281] [Impact Index Per Article: 28.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Reversible covalent bond formation under thermodynamic control adds reactivity to self-assembled supramolecular systems, and is therefore an ideal tool to assess complexity of chemical and biological systems. Dynamic combinatorial/covalent chemistry (DCC) has been used to read structural information by selectively assembling receptors with the optimum molecular fit around a given template from a mixture of reversibly reacting building blocks. This technique allows access to efficient sensing devices and the generation of new biomolecules, such as small molecule receptor binders for drug discovery, but also larger biomimetic polymers and macromolecules with particular three-dimensional structural architectures. Adding a kinetic factor to a thermodynamically controlled equilibrium results in dynamic resolution and in self-sorting and self-replicating systems, all of which are of major importance in biological systems. Furthermore, the temporary modification of bioactive compounds by reversible combinatorial/covalent derivatisation allows control of their release and facilitates their transport across amphiphilic self-assembled systems such as artificial membranes or cell walls. The goal of this review is to give a conceptual overview of how the impact of DCC on supramolecular assemblies at different levels can allow us to understand, predict and modulate the complexity of biological systems.
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Affiliation(s)
- Andreas Herrmann
- Firmenich SA, Division Recherche et Développement, Route des Jeunes 1, B. P. 239, CH-1211 Genève 8, Switzerland.
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33
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Storz C, Badoux M, Hauke CM, Šolomek T, Kühnle A, Bally T, Kilbinger AFM. One-Pot Synthesis and AFM Imaging of a Triangular Aramide Macrocycle. J Am Chem Soc 2014; 136:12832-5. [DOI: 10.1021/ja506646s] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christof Storz
- Department
of Chemistry, University of Fribourg, Chemin du Musée 9, CH-1700 Fribourg, Switzerland
| | - Michael Badoux
- Department
of Chemistry, University of Fribourg, Chemin du Musée 9, CH-1700 Fribourg, Switzerland
| | - Christopher M. Hauke
- Institut
für Physikalische Chemie, Johannes Gutenberg Universität Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany
- Graduate School of Excellence Materials Science in Mainz, Staudinger Weg 9, D-55128 Mainz, Germany
| | - Tomáš Šolomek
- Department
of Chemistry, University of Fribourg, Chemin du Musée 9, CH-1700 Fribourg, Switzerland
- RECETOX
and Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Angelika Kühnle
- Institut
für Physikalische Chemie, Johannes Gutenberg Universität Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany
| | - Thomas Bally
- Department
of Chemistry, University of Fribourg, Chemin du Musée 9, CH-1700 Fribourg, Switzerland
| | - Andreas F. M. Kilbinger
- Department
of Chemistry, University of Fribourg, Chemin du Musée 9, CH-1700 Fribourg, Switzerland
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34
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Matache M, Bogdan E, Hădade ND. Selective Host Molecules Obtained by Dynamic Adaptive Chemistry. Chemistry 2014; 20:2106-31. [DOI: 10.1002/chem.201303504] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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35
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Medina-Morales A, Perez A, Brodin JD, Tezcan FA. In vitro and cellular self-assembly of a Zn-binding protein cryptand via templated disulfide bonds. J Am Chem Soc 2013; 135:12013-22. [PMID: 23905754 DOI: 10.1021/ja405318d] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Simultaneously strong and reversible through redox chemistry, disulfide bonds play a unique and often irreplaceable role in the formation of biological and synthetic assemblies. In an approach inspired by supramolecular chemistry, we report here that engineered noncovalent interactions on the surface of a monomeric protein can template its assembly into a unique cryptand-like protein complex ((C81/C96)RIDC14) by guiding the selective formation of multiple disulfide bonds across different interfaces. Owing to its highly interconnected framework, (C81/C96)RIDC14 is well preorganized for metal coordination in its interior, can support a large internal cavity surrounding the metal sites, and can withstand significant alterations in inner-sphere metal coordination. (C81/C96)RIDC14 self-assembles with high fidelity and yield in the periplasmic space of E. coli cells, where it can successfully compete for Zn(II) binding.
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Affiliation(s)
- Annette Medina-Morales
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0356, USA
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Abstract
Photoirradiation of a hexadecameric supramolecular G-quadruplex leads to a diastereoselective [2 + 2] cyclodimerization of half of its constituent subunits, which in turn shifts the equilibrium toward the formation of a precise heteromeric octamer.
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Affiliation(s)
- José M Rivera
- Department of Chemistry, University of Puerto Rico , Río Piedras Campus, Río Piedras, Puerto Rico 00931
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37
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Otsuka H. Reorganization of polymer structures based on dynamic covalent chemistry: polymer reactions by dynamic covalent exchanges of alkoxyamine units. Polym J 2013. [DOI: 10.1038/pj.2013.17] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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38
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Kinetically Controlled Porosity in a Robust Organic Cage Material. Angew Chem Int Ed Engl 2013; 52:3746-9. [DOI: 10.1002/anie.201209922] [Citation(s) in RCA: 128] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Indexed: 11/07/2022]
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39
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Avellaneda A, Valente P, Burgun A, Evans JD, Markwell-Heys AW, Rankine D, Nielsen DJ, Hill MR, Sumby CJ, Doonan CJ. Kinetically Controlled Porosity in a Robust Organic Cage Material. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209922] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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40
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Chifotides HT, Giles ID, Dunbar KR. Supramolecular Architectures with π-Acidic 3,6-Bis(2-pyridyl)-1,2,4,5-tetrazine Cavities: Role of Anion−π Interactions in the Remarkable Stability of Fe(II) Metallacycles in Solution. J Am Chem Soc 2013; 135:3039-55. [DOI: 10.1021/ja3082473] [Citation(s) in RCA: 136] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Helen T. Chifotides
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Ian D. Giles
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Kim R. Dunbar
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
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41
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Zhu Z, Bruns CJ, Li H, Lei J, Ke C, Liu Z, Shafaie S, Colquhoun HM, Stoddart JF. Synthesis and solution-state dynamics of donor–acceptor oligorotaxane foldamers. Chem Sci 2013. [DOI: 10.1039/c3sc00015j] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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42
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Sierra S, Duskova K, Fernández MJ, Gude L, Lorente A. One-step template-directed synthesis of acridine-based rigid cyclophanes. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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43
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Ke C, Smaldone RA, Kikuchi T, Li H, Davis AP, Stoddart JF. Quantitative Emergence of Hetero[4]rotaxanes by Template-Directed Click Chemistry. Angew Chem Int Ed Engl 2012; 52:381-7. [DOI: 10.1002/anie.201205087] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Indexed: 11/06/2022]
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44
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Ke C, Smaldone RA, Kikuchi T, Li H, Davis AP, Stoddart JF. Quantitative Emergence of Hetero[4]rotaxanes by Template-Directed Click Chemistry. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201205087] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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45
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Sekiya R, Fukuda M, Kuroda R. Anion-Directed Formation and Degradation of an Interlocked Metallohelicate. J Am Chem Soc 2012; 134:10987-97. [DOI: 10.1021/ja303634u] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ryo Sekiya
- Department of Life Sciences,
Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Morihiko Fukuda
- Department of Biophysics and
Biochemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Reiko Kuroda
- Department of Life Sciences,
Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
- Department of Biophysics and
Biochemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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46
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Sindelar M, Wanner KT. Library Screening by Means of Mass Spectrometry (MS) Binding Assays-Exemplarily Demonstrated for a Pseudostatic Library Addressing γ-Aminobutyric Acid (GABA) Transporter 1 (GAT1). ChemMedChem 2012; 7:1678-90. [DOI: 10.1002/cmdc.201200201] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Indexed: 11/06/2022]
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47
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Grimster NP, Stump B, Fotsing JR, Weide T, Talley TT, Yamauchi JG, Nemecz Á, Kim C, Ho KY, Sharpless KB, Taylor P, Fokin VV. Generation of candidate ligands for nicotinic acetylcholine receptors via in situ click chemistry with a soluble acetylcholine binding protein template. J Am Chem Soc 2012; 134:6732-40. [PMID: 22394239 DOI: 10.1021/ja3001858] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Nicotinic acetylcholine receptors (nAChRs), which are responsible for mediating key physiological functions, are ubiquitous in the central and peripheral nervous systems. As members of the Cys loop ligand-gated ion channel family, neuronal nAChRs are pentameric, composed of various permutations of α (α2 to α10) and β (β2 to β4) subunits forming functional heteromeric or homomeric receptors. Diversity in nAChR subunit composition complicates the development of selective ligands for specific subtypes, since the five binding sites reside at the subunit interfaces. The acetylcholine binding protein (AChBP), a soluble extracellular domain homologue secreted by mollusks, serves as a general structural surrogate for the nAChRs. In this work, homomeric AChBPs from Lymnaea and Aplysia snails were used as in situ templates for the generation of novel and potent ligands that selectively bind to these proteins. The cycloaddition reaction between building-block azides and alkynes to form stable 1,2,3-triazoles was used to generate the leads. The extent of triazole formation on the AChBP template correlated with the affinity of the triazole product for the nicotinic ligand binding site. Instead of the in situ protein-templated azide-alkyne cycloaddition reaction occurring at a localized, sequestered enzyme active center as previously shown, we demonstrate that the in situ reaction can take place at the subunit interfaces of an oligomeric protein and can thus be used as a tool for identifying novel candidate nAChR ligands. The crystal structure of one of the in situ-formed triazole-AChBP complexes shows binding poses and molecular determinants of interactions predicted from structures of known agonists and antagonists. Hence, the click chemistry approach with an in situ template of a receptor provides a novel synthetic avenue for generating candidate agonists and antagonists for ligand-gated ion channels.
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Affiliation(s)
- Neil P Grimster
- Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
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48
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49
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Belowich ME, Valente C, Smaldone RA, Friedman DC, Thiel J, Cronin L, Stoddart JF. Positive cooperativity in the template-directed synthesis of monodisperse macromolecules. J Am Chem Soc 2012; 134:5243-61. [PMID: 22303894 DOI: 10.1021/ja2107564] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two series of oligorotaxanes R and R' that contain -CH(2)NH(2)(+)CH(2)- recognition sites in their dumbbell components have been synthesized employing template-directed protocols. [24]Crown-8 rings self-assemble by a clipping strategy around each and every recognition site using equimolar amounts of 2,6-pyridinedicarboxaldehyde and tetraethyleneglycol bis(2-aminophenyl) ether to efficiently provide up to a [20]rotaxane. In the R series, the -NH(2)(+)- recognition sites are separated by trismethylene bridges, whereas in the R' series the spacers are p-phenylene linkers. The underpinning idea here is that in the former series, the recognition sites are strategically positioned 3.5 Å apart from one another so as to facilitate efficient [π···π] stacking between the aromatic residues in contiguous rings in the rotaxanes and consequently, a discrete rigid and rod-like conformation is realized; these noncovalent interactions are absent in the latter series rendering them conformationally flexible/nondiscrete. Although in the R' series, the [3]-, [4]-, [8]-, and [12]rotaxanes were isolated after reaction times of <5-30 min in yields of 72-85%, in the R series, the [3]-, [4]-, [5]-, [8]-, [12]-, [16]-, and [20]rotaxanes were isolated in <5 min to 14 h in 88-98% yields. It follows that while in the R' series the higher order oligorotaxanes are formed in lower yields more rapidly, in the R series, the higher order oligorotaxanes are formed in higher yields more slowly. In the R series, the high percentage yields are sustained throughout, despite the fact that up to 39 components are participating in the template-directed self-assembly process. Simple arithmetic reveals that the conversion efficiency for each imine bond formation peaks at 99.9% in the R series and 99.3% in the R' series. This maintenance of reaction efficiency in the R series can be ascribed to positive cooperativity, that is, when one ring is formed it aids and abets the formation of subsequent rings presumably because of stabilizing extended [π···π] stacking interactions between the arene units. Experiments have been performed wherein the dumbbell is starved of the macrocyclic components, and up to five times more of the fully saturated rotaxane is formed than is predicted based on a purely statistical outcome, providing a clear indication that positive cooperativity is operative. Moreover, it would appear that as the R series is traversed from the [3]- to the [4]- to the [5]rotaxane, the cooperativity becomes increasingly positive. This kind of cooperative behavior is not observed for the analogous oligorotaxanes in the R' series. The conventional bevy of analytical techniques (e.g., HR-MS (ESI) and both (1)H and (13)C NMR spectroscopy) help establish the fact that all the oligorotaxanes are pure and monodisperse. Evidence of efficient [π···π] stacking between contiguous arene units in the rings in the R series is revealed by (1)H NMR spectroscopy. Ion-mobility mass spectrometry performed on the R and R' series yielded the collisional cross sections (CCSs), confirming the rigidity of the R oligorotaxanes and the flexibility of the R' ones. The extended [π···π] stacking interactions are found to be present in the solid-state structures of the [3]- and [4]rotaxanes in the R series and also on the basis of molecular mechanics calculations performed on the entire series of oligomers. The collective data presented herein supports our original design in that the extended [π···π] stacking between contiguous arene units in the rings of the R series of oligorotaxanes facilitate an essentially rigid rod-like conformation with evidence that positive cooperativity improves the efficiency of their formation. This situation stands in sharp contrast to the conformationally flexible R' series where the oligorotaxanes form with no cooperativity.
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Affiliation(s)
- Matthew E Belowich
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3133, United States
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50
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