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Gou F, Shi D, Kou B, Li Z, Yan X, Wu X, Jiang YB. One-Pot Cyclization to Large Peptidomimetic Macrocycles by In Situ-Generated β-Turn-Enforced Folding. J Am Chem Soc 2023; 145:9530-9539. [PMID: 37037798 DOI: 10.1021/jacs.2c11684] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
Abstract
Macrocycles have been targets of extensive synthetic efforts for decades because of their potent molecular recognition and self-assembly capabilities. Yet, efficient syntheses of macrocyclic molecules via irreversible covalent bonds remain challenging. Here, we report an efficient approach to large peptidomimetic macrocycles by using the in situ-generated β-turn structural motifs afforded in the amidothiourea moieties from the early steps of the reaction of 2 molecules of bilateral amino acid-based acylhydrazine with 2 molecules of diisothiocyanate. Four chiral and achiral peptidomimetic large macrocycles were successfully synthesized in high yields of 45-63% in a feasible one-pot reaction under sub-molar concentration conditions and were purified by simple filtration. X-ray crystallographic characterization of three macrocycles reveals an important feature that their four β-turn structures, each maintained by four 10-membered intramolecular hydrogen bonds, alternatively network the four aromatic arms. This affords an interesting conformation switching mode upon anion binding. Binding of SO42- to 1L or 1D that contains 4 alanine residues (with the lowest steric hinderance among the macrocycles) leads to an inside-out structural change of the host macrocycle, as confirmed by the X-ray crystal structure of 1L-SO42- and 1D-SO42- complexes, accompanied by an inversion of the CD signals. On the basis of the strong sulfate affinity of the macrocycles, we succeeded in the removal of sulfate anions from water via a macrocycle-mediated liquid-liquid extraction method. Our synthetic protocol can be easily extended to other macrocycles of varying arms and/or chiral amino acid residues; thus, a variety of structurally and functionally diverse macrocycles are expected to be readily made.
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Affiliation(s)
- Fei Gou
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University, Xiamen 361005, China
| | - Di Shi
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University, Xiamen 361005, China
| | - Bohan Kou
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University, Xiamen 361005, China
| | - Zhao Li
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University, Xiamen 361005, China
| | - Xiaosheng Yan
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University, Xiamen 361005, China
- School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Xin Wu
- School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Yun-Bao Jiang
- Department of Chemistry, College of Chemistry and Chemical Engineering, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Xiamen University, Xiamen 361005, China
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2
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Liu C, Li F, Wang J, Zhao X, Zhang T, Huang X, Wu M, Hu Z, Liu X, Li Z. Self-assembly of Supramolecular Planar Macrocycle Driven by Intermolecular Halogen Bonding. ACTA CHIMICA SINICA 2022. [DOI: 10.6023/a22080368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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3
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Xu Y, Long Y, Ye R, Li Q, Ke F, Zhou X. Fe( iii)-catalysed selective C–N bond cleavage of N-phenylamides by an electrochemical method. RSC Adv 2022; 12:24217-24221. [PMID: 36128521 PMCID: PMC9403817 DOI: 10.1039/d2ra04709h] [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: 07/28/2022] [Accepted: 08/17/2022] [Indexed: 11/21/2022] Open
Abstract
An Fe(iii)-catalysed transformation of secondary N-phenyl substituted amides to primary amides by an electrochemical method is developed. Regioselective aryl C–H oxygenation occurs during the reaction, promoting selective C(phenyl)-N bond cleavage to form primary amides in yields of up to 92%. An Fe(iii)-catalysed transformation of secondary N-phenyl substituted amides to primary amides by an electrochemical method is developed.![]()
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Affiliation(s)
- Yiwen Xu
- College of Chemistry, Sichuan University, Wangjiang Road 29, Chengdu 610064, China
| | - Yang Long
- College of Chemistry, Sichuan University, Wangjiang Road 29, Chengdu 610064, China
| | - Runyou Ye
- College of Chemistry, Sichuan University, Wangjiang Road 29, Chengdu 610064, China
| | - Qiang Li
- College of Chemistry, Sichuan University, Wangjiang Road 29, Chengdu 610064, China
| | - Fang Ke
- School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University, Fuzhou 350004, China
| | - Xiangge Zhou
- College of Chemistry, Sichuan University, Wangjiang Road 29, Chengdu 610064, China
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4
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Akhdar A, Gautier A, Hjelmgaard T, Faure S. N-Alkylated Aromatic Poly- and Oligoamides. Chempluschem 2021; 86:298-312. [PMID: 33620768 DOI: 10.1002/cplu.202000825] [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: 12/30/2020] [Revised: 02/15/2021] [Indexed: 01/18/2023]
Abstract
N-alkylated aromatic poly- and oligoamides are a particular class of abiotic foldamers that is deprived of the capability of forming intramolecular hydrogen-bonding networks to stabilize their tri-dimensional structure. The alkylation of the backbone amide nitrogen atoms greatly increases the chemical diversity accessible for aromatic poly- and oligoamides. However, the nature and the conformational preferences of the N,N-disubstituted amides profoundly modify the folding properties of these aromatic poly- and oligoamides. In this Review, representative members of this class of aromatic poly- and oligoamides will be highlighted, among them N-alkylated phenylene terephthalamides, benzanilides, pyridylamides, and aminomethyl benzamide oligomers. The principal synthetic pathways to the main classes of N-alkylated aromatic polyamides with narrow to broad molecular-weight distribution, or oligoamides with specific sequences, will be detailed and their foldameric properties will be discussed. The Review will end by describing the few applications reported to date and future prospects for the field.
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Affiliation(s)
- Ayman Akhdar
- Université Clermont Auvergne, CNRS, SIGMA Clermont, ICCF, 63000, Clermont-Ferrand, France
| | - Arnaud Gautier
- Université Clermont Auvergne, CNRS, SIGMA Clermont, ICCF, 63000, Clermont-Ferrand, France
| | - Thomas Hjelmgaard
- Rockwool International A/S, Hovedgaden 584, 2640, Hedehusene, Denmark
| | - Sophie Faure
- Université Clermont Auvergne, CNRS, SIGMA Clermont, ICCF, 63000, Clermont-Ferrand, France
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5
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Gangarde YM, Das A, Ajit J, Saraogi I. Synthesis and Evaluation of Arylamides with Hydrophobic Side Chains for Insulin Aggregation Inhibition. Chempluschem 2021; 86:750-757. [PMID: 33949802 DOI: 10.1002/cplu.202100036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 04/17/2021] [Indexed: 11/10/2022]
Abstract
Insulin, a peptide hormone, forms fibrils under aberrant physiological conditions leading to a reduction in its biological activity. To ameliorate insulin aggregation, we have synthesized a small library of oligopyridylamide foldamers decorated with different combination of hydrophobic side chains. Screening of these compounds for insulin aggregation inhibition using a Thioflavin-T assay resulted in the identification of a few hit molecules. The best hit molecule, BPAD2 inhibited insulin aggregation with an IC50 value of 0.9 μM. Mechanistic analyses suggested that BPAD2 inhibited secondary nucleation and elongation processes during aggregation. The hit molecules worked in a mechanistically distinct manner, thereby underlining the importance of structure-activity relationship studies in obtaining a molecular understanding of protein aggregation.
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Affiliation(s)
- Yogesh M Gangarde
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, 462066, MP, India
| | - Anirban Das
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, 462066, MP, India
| | - Jainu Ajit
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, 462066, MP, India
| | - Ishu Saraogi
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, 462066, MP, India.,Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, 462066, MP, India
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6
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Zhou Z, Ji H, Li Q, Zhang Q, Li D. Direct C-H aminocarbonylation of N-heteroarenes with isocyanides under transition metal-free conditions. Org Biomol Chem 2021; 19:2917-2922. [PMID: 33885551 DOI: 10.1039/d1ob00245g] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A C-C bond forming amide synthesis through direct C-H aminocarbonylation of N-heteroarenes with isocyanides was developed. The reaction was mediated by an inorganic persulfate salt under transition metal-free conditions. Mechanistic studies suggested a radical pathway for this reaction without the participation of H2O and O2. This method also showed merits of substrate availability, easy operation and atom economy. It provided an efficient route for straightforward synthesis of N-heteroaryl amides.
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Affiliation(s)
- Zhong Zhou
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China.
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7
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Yang P, Wang X, Wang L, He J, Zhang Q, Li D. Oxidative cross-dehydrogenative coupling between iodoarenes and acylanilides for C–N bond formation under metal-free conditions. Org Chem Front 2021. [DOI: 10.1039/d1qo00225b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A metal-free oxidative cross-dehydrogenative coupling between iodoarenes and acylanilides was developed. It gave highly para-selectivie C–N coupling products with the retention of iodine atom which enables further transformations.
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Affiliation(s)
- Peng Yang
- School of Materials and Chemical Engineering
- Hubei University of Technology
- Wuhan 430068
- China
| | - Xia Wang
- School of Materials and Chemical Engineering
- Hubei University of Technology
- Wuhan 430068
- China
| | - Liang Wang
- School of Materials and Chemical Engineering
- Hubei University of Technology
- Wuhan 430068
- China
| | - Jiahua He
- School of Materials and Chemical Engineering
- Hubei University of Technology
- Wuhan 430068
- China
| | - Qian Zhang
- School of Materials and Chemical Engineering
- Hubei University of Technology
- Wuhan 430068
- China
| | - Dong Li
- School of Materials and Chemical Engineering
- Hubei University of Technology
- Wuhan 430068
- China
- Hubei Key Laboratory of Drug Synthesis and Optimization
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8
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Rinaldi S. The Diverse World of Foldamers: Endless Possibilities of Self-Assembly. Molecules 2020; 25:E3276. [PMID: 32708440 PMCID: PMC7397133 DOI: 10.3390/molecules25143276] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/13/2020] [Accepted: 07/16/2020] [Indexed: 02/07/2023] Open
Abstract
Different classes of foldamers, which are synthetic oligomers that adopt well-defined conformations in solution, have been the subject of extensive studies devoted to the elucidation of the forces driving their secondary structures and their potential as bioactive molecules. Regardless of the backbone type (peptidic or abiotic), the most important features of foldamers are the high stability, easy predictability and tunability of their folding, as well as the possibility to endow them with enhanced biological functions, with respect to their natural counterparts, by the correct choice of monomers. Foldamers have also recently started playing a starring role in the self-assembly of higher-order structures. In this review, selected articles will be analyzed to show the striking number of self-assemblies obtained for foldamers with different backbones, which will be analyzed in order of increasing complexity. Starting from the simplest self-associations in solution (e.g., dimers of β-strands or helices, bundles, interpenetrating double and multiple helices), the formation of monolayers, vesicles, fibers, and eventually nanostructured solid tridimensional morphologies will be subsequently described. The experimental techniques used in the structural investigation, and in the determination of the driving forces and mechanisms underlying the self-assemblies, will be systematically reported. Where applicable, examples of biomimetic self-assembled foldamers and their interactions with biological components will be described.
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Affiliation(s)
- Samuele Rinaldi
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche, 60131 Ancona, Italy
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9
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Marafon G, Crisma M, Moretto A. Tunable E- Z Photoisomerization in α,β-Peptide Foldamers Featuring Multiple ( E/ Z)-3-Aminoprop-2-enoic Acid Units. Org Lett 2019; 21:4182-4186. [PMID: 31090420 DOI: 10.1021/acs.orglett.9b01360] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Systems in which an external stimulus elicits a response through some sort of modification at the molecular or supramolecular level bear potential for the development of smart materials and devices. This work describes a versatile synthetic approach suitable for the stepwise incorporation of multiple, even consecutive, units of the simplest Cα,β-unsaturated β-amino acid, ( E/ Z)-3-aminoprop-2-enoic acid, in peptide-based foldamers. The properties of these, including photoinduced E/ Z isomerizations, were investigated.
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Affiliation(s)
- Giulia Marafon
- Department of Chemical Sciences , University of Padova , 35131 Padova , Italy
| | - Marco Crisma
- Institute of Biomolecular Chemistry , Padova Unit, CNR , 35131 Padova , Italy
| | - Alessandro Moretto
- Department of Chemical Sciences , University of Padova , 35131 Padova , Italy.,Institute of Biomolecular Chemistry , Padova Unit, CNR , 35131 Padova , Italy
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10
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Liu CZ, Koppireddi S, Wang H, Zhang DW, Li ZT. Halogen bonding-driven formation of supramolecular macrocycles and double helix. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.02.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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11
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Xing X, Zhao Y. Aromatically functionalized pseudo-crown ethers with unusual solvent response and enhanced binding properties. Org Biomol Chem 2019; 16:1627-1631. [PMID: 29446435 DOI: 10.1039/c8ob00100f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conformational flexibility in the host's structure is often considered detrimental to its binding. Flexible pseudo-crown ethers with aromatic donor/acceptor groups at the chain ends, however, displayed enhanced binding affinity and selectivity, particularly when the direct binding interactions were compromised by unfavorable solvents.
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Affiliation(s)
- Xiaoyu Xing
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, USA.
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12
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Koppireddi S, Liu CZ, Wang H, Zhang DW, Li ZT. Halogen and hydrogen bonding-driven self-assembly of supramolecular macrocycles and double helices from hydrogen-bonded arylamide foldamers. CrystEngComm 2019. [DOI: 10.1039/c8ce02187b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Halogen bonding has been used to hold hydrogen bonded short aromatic amide foldamers to form 2 + 2 or 1 + 1 macrocycles.
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Affiliation(s)
- Satish Koppireddi
- Department of Chemistry
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- and Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM)
- Fudan University
- Shanghai 200438
| | - Chuan-Zhi Liu
- Department of Chemistry
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- and Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM)
- Fudan University
- Shanghai 200438
| | - Hui Wang
- Department of Chemistry
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- and Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM)
- Fudan University
- Shanghai 200438
| | - Dan-Wei Zhang
- Department of Chemistry
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- and Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM)
- Fudan University
- Shanghai 200438
| | - Zhan-Ting Li
- Department of Chemistry
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- and Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM)
- Fudan University
- Shanghai 200438
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13
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Evgrafova Z, Voigt B, Baumann M, Stephani M, Binder WH, Balbach J. Probing Polymer Chain Conformation and Fibril Formation of Peptide Conjugates. Chemphyschem 2018; 20:236-240. [PMID: 30221816 DOI: 10.1002/cphc.201800867] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Indexed: 12/29/2022]
Abstract
Covalent conjugates between a synthetic polymer and a peptide hormone were used to probe the molecular extension of these macromolecules and how the polymer modifies the fibril formation of the hormone. NMR spectroscopy of 15 N labeled parathyroid hormone (PTH) was employed to visualize the conformation of the conjugated synthetic polymer, triggered by small temperature changes via its lower critical solution temperature. A shroud-like polymer conformation dominated the molecular architecture of the conjugated chimeras. PTH readily forms amyloid fibrils, which is probably the physiological storage form of the hormone. The polyacrylate based polymers stimulated the nucleation processes of the peptide.
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Affiliation(s)
- Zhanna Evgrafova
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120, Halle (Saale), Germany
| | - Bruno Voigt
- Institute of Physics, Martin Luther University Halle-Wittenberg, Betty-Heimann-Str. 7, 06120, Halle (Saale), Germany
| | - Monika Baumann
- Institute of Physics, Martin Luther University Halle-Wittenberg, Betty-Heimann-Str. 7, 06120, Halle (Saale), Germany
| | - Madlen Stephani
- Institute of Physics, Martin Luther University Halle-Wittenberg, Betty-Heimann-Str. 7, 06120, Halle (Saale), Germany
| | - Wolfgang H Binder
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120, Halle (Saale), Germany
| | - Jochen Balbach
- Institute of Physics, Martin Luther University Halle-Wittenberg, Betty-Heimann-Str. 7, 06120, Halle (Saale), Germany
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14
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Marafon G, Crisma M, Moretto A. Intrinsically Photoswitchable α/β Peptides toward Two-State Foldamers. Angew Chem Int Ed Engl 2018; 57:10217-10220. [DOI: 10.1002/anie.201806035] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Giulia Marafon
- Department of Chemical Sciences; University of Padova; via Marzolo, 1 Padova Italy
| | - Marco Crisma
- Institute of Biomolecular Chemistry; Padova Unit; CNR; via Marzolo, 1 Padova Italy
| | - Alessandro Moretto
- Department of Chemical Sciences; University of Padova; via Marzolo, 1 Padova Italy
- Institute of Biomolecular Chemistry; Padova Unit; CNR; via Marzolo, 1 Padova Italy
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15
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Marafon G, Crisma M, Moretto A. Intrinsically Photoswitchable α/β Peptides toward Two-State Foldamers. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Giulia Marafon
- Department of Chemical Sciences; University of Padova; via Marzolo, 1 Padova Italy
| | - Marco Crisma
- Institute of Biomolecular Chemistry; Padova Unit; CNR; via Marzolo, 1 Padova Italy
| | - Alessandro Moretto
- Department of Chemical Sciences; University of Padova; via Marzolo, 1 Padova Italy
- Institute of Biomolecular Chemistry; Padova Unit; CNR; via Marzolo, 1 Padova Italy
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16
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Chen L, Wang H, Zhang DW, Zhou Y, Li ZT. Pt⋯Pt and π–π interactions-induced pleated polymeric foldamers. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Yan XY, Lin MD, Zheng ST, Zhan TG, Zhang X, Zhang KD, Zhao X. Recent advances of hexaazatriphenylene (HAT) derivatives: Their applications in self-assembly and porous organic materials. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.01.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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18
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Nitti A, Pacini A, Pasini D. Chiral Nanotubes. NANOMATERIALS (BASEL, SWITZERLAND) 2017; 7:E167. [PMID: 28677640 PMCID: PMC5535233 DOI: 10.3390/nano7070167] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 06/22/2017] [Accepted: 06/28/2017] [Indexed: 01/01/2023]
Abstract
Organic nanotubes, as assembled nanospaces, in which to carry out host-guest chemistry, reversible binding of smaller species for transport, sensing, storage or chemical transformation purposes, are currently attracting substantial interest, both as biological ion channel mimics, or for addressing tailored material properties. Nature's materials and machinery are universally asymmetric, and, for chemical entities, controlled asymmetry comes from chirality. Together with carbon nanotubes, conformationally stable molecular building blocks and macrocycles have been used for the realization of organic nanotubes, by means of their assembly in the third dimension. In both cases, chiral properties have started to be fully exploited to date. In this paper, we review recent exciting developments in the synthesis and assembly of chiral nanotubes, and of their functional properties. This review will include examples of either molecule-based or macrocycle-based systems, and will try and rationalize the supramolecular interactions at play for the three-dimensional (3D) assembly of the nanoscale architectures.
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Affiliation(s)
- Andrea Nitti
- Department of Chemistry, University of Pavia, Viale Taramelli, 12-27100 Pavia, Italy.
| | - Aurora Pacini
- Department of Chemistry, University of Pavia, Viale Taramelli, 12-27100 Pavia, Italy.
- INSTM Research Unit, University of Pavia, Viale Taramelli, 12-27100 Pavia, Italy.
| | - Dario Pasini
- Department of Chemistry, University of Pavia, Viale Taramelli, 12-27100 Pavia, Italy.
- INSTM Research Unit, University of Pavia, Viale Taramelli, 12-27100 Pavia, Italy.
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19
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Zhang DW, Wang H, Li ZT. Polymeric Tubular Aromatic Amide Helices. Macromol Rapid Commun 2017; 38. [DOI: 10.1002/marc.201700179] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 04/10/2017] [Indexed: 12/15/2022]
Affiliation(s)
- Dan-Wei Zhang
- Department of Chemistry; Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Collaborative Innovation Center of Chemistry for Energy Materials (iChEM); Fudan University; Shanghai 200433 China
| | - Hui Wang
- Department of Chemistry; Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Collaborative Innovation Center of Chemistry for Energy Materials (iChEM); Fudan University; Shanghai 200433 China
| | - Zhan-Ting Li
- Department of Chemistry; Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Collaborative Innovation Center of Chemistry for Energy Materials (iChEM); Fudan University; Shanghai 200433 China
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20
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Zhan TG, Wu L, Zhao Z, Zhou ZB, Yun MY, Wei J, Zheng ST, Yin HH, Zhang KD. Reversible conversion between a pleated oligo-tetrathiafulvalene radical foldamer and folded donor-acceptor [3]pseudorotaxane under redox conditions. Chem Commun (Camb) 2017; 53:5396-5399. [PMID: 28451683 DOI: 10.1039/c7cc02526b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Linear tetrathiafulvalene (TTF) oligomers were synthesized, which could not only form a pleated TTF˙+ radical cation foldamer under oxidation conditions, but also interlocked with CBPQT4+ to form folded donor-acceptor [3]pseudorotaxane in the neutral state of TTF. Moreover, switchable transformation between these two folded supramolecular structures was achieved under the alternative regulation of the redox states of TTF units.
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Affiliation(s)
- Tian-Guang Zhan
- College of Chemistry and Life Science, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China.
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21
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Xiao Y, Wang HQ, Zhang H, Jiang ZQ, Wang YQ, Li H, Yin J, Zhu YY, Wu ZQ. Grafting polymerization of single-handed helical poly(phenyl isocyanide)s on graphene oxide and their application in enantioselective separation. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28599] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yi Xiao
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering; Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices; Hefei Anhui Province 230009 China
| | - Hui-Qing Wang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering; Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices; Hefei Anhui Province 230009 China
| | - Hao Zhang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM); Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech); 30 South Puzhu Road Nanjing 211816 China
| | - Zhi-Qiang Jiang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering; Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices; Hefei Anhui Province 230009 China
| | - Ya-Qi Wang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering; Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices; Hefei Anhui Province 230009 China
| | - Hai Li
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM); Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech); 30 South Puzhu Road Nanjing 211816 China
| | - Jun Yin
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering; Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices; Hefei Anhui Province 230009 China
| | - Yuan-Yuan Zhu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering; Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices; Hefei Anhui Province 230009 China
| | - Zong-Quan Wu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering; Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices; Hefei Anhui Province 230009 China
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22
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Shen J, Ren C, Zeng H. Surprisingly High Selectivity and High Affinity in Mercury Recognition by H-Bonded Cavity-Containing Aromatic Foldarands. J Am Chem Soc 2017; 139:5387-5396. [PMID: 28151660 DOI: 10.1021/jacs.6b13342] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In the absence of macrocyclic ring constraints, few synthetic systems, possessing a mostly solvent-independent well-folded conformation that is predisposed for highly selective and high affinity recognition of metal ions, have been demonstrated. We report here such a unique class of conformationally robust modularly tunable folding molecules termed foldarands that can recognize Hg2+ ions surprisingly well over 22 other metal ions. Despite the lack of sulfur atoms and having only oxygen-donor atoms in its structure, the best foldarand molecule, i.e., tetramer 4, exhibits a selectivity factor of at least 19 in differentiating the most tightly bound Hg2+ ion from all other metal ions, and a binding capacity that is ≥18 times that of thio-crown ethers. These two noteworthy binding characters make possible low level removal of Hg2+ ions. With a [4]:[Hg2+] molar ratio of 5:1 and a single biphasic solvent extraction, the concentration of Hg2+ ions could be reduced drastically by 98% (from 200 to 4 ppb) in pure water. 4 could also effect a highly efficient reduction in mercury content by 98% (from 500 to 10 ppb) in artificial groundwater via multiple successive extractions with an overall consumption of 4 being 9:1 in terms of [4]:[Hg2+] molar ratio.
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Affiliation(s)
- Jie Shen
- Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos, Singapore 138669
| | - Changliang Ren
- Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos, Singapore 138669
| | - Huaqiang Zeng
- Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos, Singapore 138669
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23
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Sankar R, Babu SA. Construction of Tertiary Amides: NiII
-Catalyzed N
-Arylation of Secondary Acyclic Amides (2-Picolinamides) with Aryl Halides. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201600596] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Rathinam Sankar
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali; Manauli P.O., Sector 81, SAS Nagar, Mohali, Knowledge City Punjab 140306 India
| | - Srinivasarao Arulananda Babu
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali; Manauli P.O., Sector 81, SAS Nagar, Mohali, Knowledge City Punjab 140306 India
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24
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Li X, Yuan X, Deng P, Chen L, Ren Y, Wang C, Wu L, Feng W, Gong B, Yuan L. Macrocyclic shape-persistency of cyclo[6]aramide results in enhanced multipoint recognition for the highly efficient template-directed synthesis of rotaxanes. Chem Sci 2016; 8:2091-2100. [PMID: 28451329 PMCID: PMC5399641 DOI: 10.1039/c6sc04714a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Accepted: 11/21/2016] [Indexed: 12/16/2022] Open
Abstract
Examples of using two-dimensional shape-persistent macrocycles, i.e. those having noncollapsible and geometrically well-defined skeletons, for constructing mechanically interlocked molecules are scarce, which contrasts the many applications of these macrocycles in molecular recognition and functional self-assembly. Herein, we report the crucial role played by macrocyclic shape-persistency in enhancing multipoint recognition for the highly efficient template-directed synthesis of rotaxanes. Cyclo[6]aramides, with a near-planar conformation, are found to act as powerful hosts that bind bipyridinium salts with high affinities. This unique recognition module, composed of two macrocyclic molecules with one bipyridinium ion thread through the cavity, is observed both in the solid state and in solution, with unusually high binding constants ranging from ∼1013 M-2 to ∼1015 M-2 in acetone. The high efficacy of this recognition motif is embodied by the formation of compact [3]rotaxanes in excellent yields based on either a "click-capping" (91%) or "facile one-pot" (85%) approach, underscoring the great advantage of using H-bonded aromatic amide macrocycles for the highly efficient template-directed synthesis of mechanically interlocked structures. Furthermore, three cyclo[6]aramides bearing different peripheral chains 1-3 demonstrate high specificity in the synthesis of a [3]rotaxane from 1 and 2, and a [2]rotaxane from 3via a "facile one-pot" approach, in each case as the only isolated product. Analysis of the crystal structure of the [3]rotaxane reveals a highly compact binding mode that would be difficult to access using other macrocycles with a flexible backbone. Leveraging this unique recognition motif, resulting from the shape-persistency of these oligoamide macrocycles, in the template-directed synthesis of compact rotaxanes may open up new opportunities for the development of higher order interlocked molecules and artificial molecular machines.
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Affiliation(s)
- Xiaowei Li
- College of Chemistry , Key Laboratory for Radiation Physics and Technology of Ministry of Education , Analytical & Testing Center , Sichuan University , Chengdu 610064 , Sichuan , China . ; ; Tel: +86-28-85412890
| | - Xiangyang Yuan
- College of Chemistry , Key Laboratory for Radiation Physics and Technology of Ministry of Education , Analytical & Testing Center , Sichuan University , Chengdu 610064 , Sichuan , China . ; ; Tel: +86-28-85412890
| | - Pengchi Deng
- College of Chemistry , Key Laboratory for Radiation Physics and Technology of Ministry of Education , Analytical & Testing Center , Sichuan University , Chengdu 610064 , Sichuan , China . ; ; Tel: +86-28-85412890
| | - Lixi Chen
- College of Chemistry , Key Laboratory for Radiation Physics and Technology of Ministry of Education , Analytical & Testing Center , Sichuan University , Chengdu 610064 , Sichuan , China . ; ; Tel: +86-28-85412890
| | - Yi Ren
- College of Chemistry , Key Laboratory for Radiation Physics and Technology of Ministry of Education , Analytical & Testing Center , Sichuan University , Chengdu 610064 , Sichuan , China . ; ; Tel: +86-28-85412890
| | - Chengyuan Wang
- College of Chemistry , Key Laboratory for Radiation Physics and Technology of Ministry of Education , Analytical & Testing Center , Sichuan University , Chengdu 610064 , Sichuan , China . ; ; Tel: +86-28-85412890
| | - Lixin Wu
- State Key Laboratory of Supramolecular Structure and Materials , Jilin University , Changchun 130012 , China
| | - Wen Feng
- College of Chemistry , Key Laboratory for Radiation Physics and Technology of Ministry of Education , Analytical & Testing Center , Sichuan University , Chengdu 610064 , Sichuan , China . ; ; Tel: +86-28-85412890
| | - Bing Gong
- Department of Chemistry , The State University of New York , Buffalo , New York 14260 , USA
| | - Lihua Yuan
- College of Chemistry , Key Laboratory for Radiation Physics and Technology of Ministry of Education , Analytical & Testing Center , Sichuan University , Chengdu 610064 , Sichuan , China . ; ; Tel: +86-28-85412890
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25
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Hydrophobically driven chiral column aggregates of hydrazide macrocycles and side chains-controlled chirality conversion. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.06.090] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Luo Z, Zhu N, Zhao D. Helical Folding Competing with Unfolded Aggregation in Phenylene Ethynylene Foldamers. Chemistry 2016; 22:11028-34. [PMID: 27374725 DOI: 10.1002/chem.201601804] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Indexed: 11/05/2022]
Abstract
The folding and aggregation behavior of a pair of oligo(phenylene ethynylene) (OPE) foldamers are investigated by means of UV/Vis absorption and circular dichroism spectroscopy. With identical OPE backbones, two foldamers, 1 with alkyl side groups and 2 with triethylene glycol side chains, manifest similar helical conformations in solutions in n-hexane and methanol, respectively. However, disparate and competing folding and aggregation processes are observed in alternative solvents. In cyclohexane, oligomer 1 initially adopts the helical conformation, but the self-aggregation of unfolded chains, as a minor component, gradually drives the folding-unfolding transition eventually to the unfolded aggregate state completely. In contrast, in aqueous solution (CH3 OH/H2 O) both folded and unfolded oligomer 2 appear to undergo self-association; aggregates of the folded chains are thermodynamically more stable. In solutions with a high H2 O content, self-aggregation among unfolded oligomers is kinetically favored; these oligomers very slowly transform into aggregates of helical structures with greater thermodynamic stability. The folded-unfolded conformational switch thus takes place with the free (nonaggregated) molecules, and the very slow folding transition is due to the low concentration of molecularly dispersed oligomers.
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Affiliation(s)
- Zhouyang Luo
- Beijing National Laboratory for Molecular Sciences, Department of Applied Chemistry, Center of Soft Matter Science and Engineering and Key Laboratory, of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry, Peking University, Beijing, P.R. China
| | - Ningbo Zhu
- Beijing National Laboratory for Molecular Sciences, Department of Applied Chemistry, Center of Soft Matter Science and Engineering and Key Laboratory, of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry, Peking University, Beijing, P.R. China
| | - Dahui Zhao
- Beijing National Laboratory for Molecular Sciences, Department of Applied Chemistry, Center of Soft Matter Science and Engineering and Key Laboratory, of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry, Peking University, Beijing, P.R. China.
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27
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Du J, Kang K, Hu J, Mao L, Yuan L, Feng W. Effect of Hydrogen Binding on Selective Recognition of Halide Anions. CHINESE J CHEM 2016. [DOI: 10.1002/cjoc.201600237] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Zhang YC, Chen L, Wang H, Zhou YM, Zhang DW, Li ZT. Pleated polymeric foldamers driven by donor–acceptor interaction and conjugated radical cation dimerization. CHINESE CHEM LETT 2016. [DOI: 10.1016/j.cclet.2016.03.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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29
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Luo K, Wang W, Cao R, Feng W. Multiple hydrogen bonds-mediated formation of supramolecular polysiloxanes based on oligoamide duplexes. RUSS J GEN CHEM+ 2016. [DOI: 10.1134/s1070363216040289] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Li X, Li B, Chen L, Hu J, Wen C, Zheng Q, Wu L, Zeng H, Gong B, Yuan L. Liquid-crystalline mesogens based on cyclo[6]aramides: distinctive phase transitions in response to macrocyclic host-guest interactions. Angew Chem Int Ed Engl 2016; 54:11147-52. [PMID: 26352024 DOI: 10.1002/anie.201505278] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Indexed: 11/12/2022]
Abstract
Producing macrocyclic mesogens that are responsive to guest encapsulation presents a significant challenge. Cyclo[6]aramides, a type of macrocycle with a hydrogen-bond-constrained backbone, exhibit thermotropic lamellar, discotic nematic, hexagonal, and rectangular columnar mesophases over a considerably wide temperature range, including at room temperature. Additionally, cyclo[6]aramides show unusual mesophase transitions from lamellar to hexagonal columnar phase mediated by macrocyclic host-guest (H-G) interactions between the macrocycles and alkylammonium salts. The phase transition, triggered by an organic guest engaging in H-G interactions with a macrocyclic cavity, provides a novel strategy for manipulating the properties of liquid-crystalline materials. The crystal structure of a homologous cyclo[6]aramide reveals a disk-shaped, near-planar molecular backbone that facilitates intermolecular π-π stacking and leads to columnar assembly.
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Affiliation(s)
- Xiaowei Li
- College of Chemistry, Key Laboratory for Radiation Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610064 (China)
| | - Bao Li
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012 (China)
| | - Long Chen
- College of Chemistry, Key Laboratory for Radiation Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610064 (China)
| | - Jinchuan Hu
- College of Chemistry, Key Laboratory for Radiation Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610064 (China)
| | - Chengdanyang Wen
- College of Chemistry, Key Laboratory for Radiation Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610064 (China)
| | - Qingdong Zheng
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China)
| | - Lixin Wu
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012 (China)
| | - Huaqiang Zeng
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669 (Singapore)
| | - Bing Gong
- Department of Chemistry, The State University of New York, Buffalo, NY 14260 (USA).
| | - Lihua Yuan
- College of Chemistry, Key Laboratory for Radiation Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610064 (China).
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31
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Zhang P, Zhang L, Wang ZK, Zhang YC, Guo R, Wang H, Zhang DW, Li ZT. Guest-Induced Arylamide Polymer Helicity: Twist-Sense Bias and Solvent-Dependent Helicity Inversion. Chem Asian J 2016; 11:1725-30. [DOI: 10.1002/asia.201600289] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Indexed: 01/07/2023]
Affiliation(s)
- Peng Zhang
- Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM); Fudan University; 220 Handan Road Shanghai 200433 China
| | - Liang Zhang
- Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM); Fudan University; 220 Handan Road Shanghai 200433 China
| | - Ze-Kun Wang
- Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM); Fudan University; 220 Handan Road Shanghai 200433 China
| | - Yun-Chang Zhang
- Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM); Fudan University; 220 Handan Road Shanghai 200433 China
| | - Rong Guo
- Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM); Fudan University; 220 Handan Road Shanghai 200433 China
| | - Hui Wang
- Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM); Fudan University; 220 Handan Road Shanghai 200433 China
| | - Dan-Wei Zhang
- Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM); Fudan University; 220 Handan Road Shanghai 200433 China
| | - Zhan-Ting Li
- Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM); Fudan University; 220 Handan Road Shanghai 200433 China
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32
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Ingole TS, Kotmale AS, Gawade RL, Gonnade RG, Rajamohanan PR, Sanjayan GJ. 3-Aminothiophenecarboxylic acid (3-Atc)-induced folding in peptides. NEW J CHEM 2016. [DOI: 10.1039/c6nj01667g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
This article demonstrates the consequences of incorporating a constrained β-amino acid into a peptide chain and its effect on conformation of oligomers.
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Affiliation(s)
- Tukaram S. Ingole
- Division of Organic Chemistry
- National Chemical Laboratory
- Pune 411 008
- India
| | - Amol S. Kotmale
- Central NMR Facility
- National Chemical Laboratory
- Pune 411 008
- India
| | - Rupesh L. Gawade
- Center for Materials Characterization
- National Chemical Laboratory
- Pune
- India
| | - Rajesh G. Gonnade
- Center for Materials Characterization
- National Chemical Laboratory
- Pune
- India
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33
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Islam MM, Halder M, Roy AS, Chatterjee S, Bhaumik A, Islam SM. Copper(ii) incorporated functionalized polystyrene catalyzed N-arylation of amides under solvent free condition with broad substrate scope. RSC Adv 2016. [DOI: 10.1039/c6ra24459a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new polymer supported Cu(ii) catalyst has been reported for N-arylation of various amides with aryl halides under neat reaction conditions.
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Affiliation(s)
| | - Mita Halder
- Department of Chemistry
- University of Calcutta
- Kolkata 700 009
- India
| | - Anupam Singha Roy
- Catalytic Conversion & Processes Division
- CSIR-Indian Institute of Petroleum
- Dehradun 248005
- India
- European Bioenergy Research Institute
| | - Sauvik Chatterjee
- Department of Material Science
- Indian Association for the Cultivation of Science
- Kolkata – 700032
- India
| | - Asim Bhaumik
- Department of Material Science
- Indian Association for the Cultivation of Science
- Kolkata – 700032
- India
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34
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Suć J, Jerić I. Synthesis of hybrid hydrazino peptides: protected vs unprotected chiral α-hydrazino acids. SPRINGERPLUS 2015; 4:507. [PMID: 26405627 PMCID: PMC4573739 DOI: 10.1186/s40064-015-1288-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 08/28/2015] [Indexed: 11/30/2022]
Abstract
Peptidomimetics based on hydrazino derivatives of α-amino acids represent an important class of peptidic foldamers with promising biological activities, like protease inhibition and antimicrobial activity. However, the lack of straightforward method for the synthesis of optically pure hydrazino acids and efficient incorporation of hydrazino building blocks into peptide sequence hamper wider exploitation of hydrazino peptidomimetics. Here we described the utility of Nα-benzyl protected and unprotected hydrazino derivatives of natural α-amino acids in synthesis of peptidomimetics. While incorporation of Nα-benzyl-hydrazino acids into peptide chain and deprotection of benzyl moiety proceeded with difficulties, unprotected hydrazino acids allowed fast and simple construction of hybrid peptidomimetics.
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35
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Liquid-Crystalline Mesogens Based on Cyclo[6]aramides: Distinctive Phase Transitions in Response to Macrocyclic Host-Guest Interactions. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505278] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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36
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Tinnis F, Stridfeldt E, Lundberg H, Adolfsson H, Olofsson B. Metal-free N-arylation of secondary amides at room temperature. Org Lett 2015; 17:2688-91. [PMID: 25966029 DOI: 10.1021/acs.orglett.5b01079] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The arylation of secondary acyclic amides has been achieved with diaryliodonium salts under mild and metal-free conditions. The methodology has a wide scope, allows synthesis of tertiary amides with highly congested aryl moieties, and avoids the regioselectivity problems observed in reactions with (diacetoxyiodo)benzene.
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Affiliation(s)
- Fredrik Tinnis
- †Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Elin Stridfeldt
- †Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Helena Lundberg
- †Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Hans Adolfsson
- †Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Berit Olofsson
- †Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden.,‡Stellenbosch Institute for Advanced Study (STIAS), Wallenberg Research Centre at Stellenbosch University, Marais Street, Stellenbosch 7600, South Africa
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37
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Le Bailly BAF, Byrne L, Diemer V, Foroozandeh M, Morris GA, Clayden J. Flaws in foldamers: conformational uniformity and signal decay in achiral helical peptide oligomers. Chem Sci 2015; 6:2313-2322. [PMID: 29308146 PMCID: PMC5645781 DOI: 10.1039/c4sc03944k] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 01/19/2015] [Indexed: 11/21/2022] Open
Abstract
Although foldamers, by definition, are extended molecular structures with a well-defined conformation, minor conformers must be populated at least to some extent in solution. We present a quantitative analysis of these minor conformers for a series of helical oligomers built from achiral but helicogenic α-amino acids. By measuring the chain length dependence or chain position dependence of NMR or CD quantities that measure screw-sense preference in a helical oligomer, we quantify values for the decay constant of a conformational signal as it passes through the molecular structure. This conformational signal is a perturbation of the racemic mixture of M and P helices that such oligomers typically adopt by the inclusion of an N or C terminal chiral inducer. We show that decay constants may be very low (<1% signal loss per residue) in non-polar solvents, and we evaluate the increase in decay constant that results in polar solvents, at higher temperatures, and with more conformationally flexible residues such as Gly. Decay constants are independent of whether the signal originates from the N or the C terminus. By interpreting the decay constant in terms of the probability with which conformations containing a screw-sense reversal are populated, we quantify the populations of these alternative minor conformers within the overall ensemble of secondary structures adopted by the foldamer. We deduce helical persistence lengths for Aib polymers that allow us to show that in a non-polar solvent a peptide helix, even in the absence of chiral residues, may continue with the same screw sense for approximately 200 residues.
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Affiliation(s)
- Bryden A F Le Bailly
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK .
| | - Liam Byrne
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK .
| | - Vincent Diemer
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK .
| | | | - Gareth A Morris
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK .
| | - Jonathan Clayden
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK .
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38
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Efficient separation of thorium from rare earths with a hydrogen-bonded oligoaramide extractant in highly acidic media. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-015-3990-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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39
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Chen L, Wang H, Zhang DW, Zhou Y, Li ZT. Quadruple Switching of Pleated Foldamers of Tetrathiafulvalene-Bipyridinium Alternating Dynamic Covalent Polymers. Angew Chem Int Ed Engl 2015; 54:4028-31. [PMID: 25651411 DOI: 10.1002/anie.201410757] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Indexed: 01/04/2023]
Affiliation(s)
- Lan Chen
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University, 220 Handan Road, Shanghai 200433 (China)
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40
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Chen L, Wang H, Zhang DW, Zhou Y, Li ZT. Quadruple Switching of Pleated Foldamers of Tetrathiafulvalene-Bipyridinium Alternating Dynamic Covalent Polymers. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201410757] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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41
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Sarkar R, Debnath M, Maji K, Haldar D. Solvent assisted structural diversity: supramolecular sheet and double helix of a short aromatic γ-peptide. RSC Adv 2015. [DOI: 10.1039/c5ra12831e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Solvent interaction has a significant effect on the molecular motions, folding and self-assembly of short aromatic γ-peptides that leads to a change in initial helical conformation.
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Affiliation(s)
- Rajib Sarkar
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- India
| | - Mintu Debnath
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- India
| | - Krishnendu Maji
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- India
| | - Debasish Haldar
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- India
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42
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Zhang P, Zhang L, Wang H, Zhang DW, Li ZT. Helical folding of an arylamide polymer in water and organic solvents of varying polarity. Polym Chem 2015. [DOI: 10.1039/c5py00096c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An arylamide polymer is driven by the solvophobicity and hydrogen bonding to form helical conformation in solvents of different polarity.
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Affiliation(s)
- Peng Zhang
- Department of Chemistry
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM)
- Fudan University
- Shanghai 200433
- China
| | - Liang Zhang
- Department of Chemistry
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM)
- Fudan University
- Shanghai 200433
- China
| | - Hui Wang
- Department of Chemistry
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM)
- Fudan University
- Shanghai 200433
- China
| | - Dan-Wei Zhang
- Department of Chemistry
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM)
- Fudan University
- Shanghai 200433
- China
| | - Zhan-Ting Li
- Department of Chemistry
- Collaborative Innovation Center of Chemistry for Energy Materials (iChEM)
- Fudan University
- Shanghai 200433
- China
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43
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Ma W, Wang C, Li J, Zhang K, Lu YJ, Huo Y, Zeng H. The Dynamics, energetics and selectivity of water chain-containing aquapores created by the self-assembly of aquafoldamer molecules. Org Biomol Chem 2015; 13:10613-9. [DOI: 10.1039/c5ob01732g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Self-assembled hollow tubular aquapores were found to be stable, very dynamic yet highly selective toward recognition of water molecules.
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Affiliation(s)
- Wenliang Ma
- Faculty of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangdong
- China
| | - Chunquan Wang
- Faculty of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangdong
- China
| | - Juntong Li
- Faculty of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangdong
- China
| | - Kun Zhang
- Faculty of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangdong
- China
- School of Chemical and Environmental Engineering
| | - Yu-Jing Lu
- Faculty of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangdong
- China
| | - Yanping Huo
- Faculty of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangdong
- China
| | - Huaqiang Zeng
- Institute of Bioengineering and Nanotechnology
- The Nanos
- Singapore 138669
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44
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Zhan TG, Lu BY, Lin F, Zhou TY, Zhao X, Li ZT. Donor–acceptor interaction-driven folding of linear naphthalene–glycol oligomers templated by a rigid bipyridinium rod. Org Chem Front 2015. [DOI: 10.1039/c5qo00244c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The construction of folded and helical supramolecular structures through the self-assembly of a series of flexible linear oligomers induced by a rigid rod-like template has been demonstrated.
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Affiliation(s)
- Tian-Guang Zhan
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Ben-Ye Lu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Feng Lin
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Tian-You Zhou
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Xin Zhao
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Zhan-Ting Li
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
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45
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Hydrogen-Bonding-Driven Aromatic Foldamers: Their Structural and Functional Evolution. CHEM REC 2014; 15:233-51. [DOI: 10.1002/tcr.201402046] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Indexed: 12/16/2022]
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46
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Kabanda MM, Tran VT, Tran QT, Ebenso EE. A computational study of pyrazinamide: Tautomerism, acid–base properties, micro-solvation effects and acid hydrolysis mechanism. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2014.07.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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47
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He Y, Xu M, Gao R, Li X, Li F, Wu X, Xu D, Zeng H, Yuan L. Two-component supramolecular gels derived from amphiphilic shape-persistent cyclo[6]aramides for specific recognition of native arginine. Angew Chem Int Ed Engl 2014; 53:11834-9. [PMID: 25213644 DOI: 10.1002/anie.201407092] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 08/14/2014] [Indexed: 01/05/2023]
Abstract
A unique supramolecular two-component gelation system was constructed from amphiphilic shape-persistent cyclo[6]aramides and diethylammonium chloride (or triethylammonium chloride). This system has the ability to discriminate native arginine from 19 other amino acids in a specific fashion. Cyclo[6]aramides show preferential binding for the guanidinium residue over ammonium groups. This specificity was confirmed by both experimental results and theoretical simulations. These results demonstrated a new modular displacement strategy, exploring the use of species-binding hydrogen-bonded macrocyclic foldamers for the construction of two-component gelation systems for selective recognition of native amino acids by competitive host-guest interactions. This strategy may be amenable to developing a variety of functional two-component gelators for specific recognition of various targeted organic molecular species.
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Affiliation(s)
- Youzhou He
- College of Chemistry, Key Laboratory for Radiation Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610064 (China)
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48
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He Y, Xu M, Gao R, Li X, Li F, Wu X, Xu D, Zeng H, Yuan L. Two-Component Supramolecular Gels Derived from Amphiphilic Shape-Persistent Cyclo[6]aramides for Specific Recognition of Native Arginine. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407092] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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49
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Zhang DW, Zhao X, Li ZT. Aromatic amide and hydrazide foldamer-based responsive host-guest systems. Acc Chem Res 2014; 47:1961-70. [PMID: 24673152 DOI: 10.1021/ar5000242] [Citation(s) in RCA: 138] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
CONSPECTUS: In host-guest chemistry, a larger host molecule selectively and noncovalently binds to a smaller guest molecule or ion. Early studies of host-guest chemistry focused on the recognition of spherical metal or ammonium ions by macrocyclic hosts, such as cyclic crown ethers. In these systems, preorganization enables their binding sites to cooperatively contact and attract a guest. Although some open-chain crown ether analogues possess similar, but generally lower, binding affinities, the design of acyclic molecular recognition hosts has remained challenging. One of the most successful examples was rigid molecular tweezers, acyclic covalently bonded preorganized host molecules with open cavities that bind tightly as they stiffen. Depending on the length of the atomic backbones, hydrogen bonding-driven aromatic amide foldamers can form open or closed cavities. Through rational design of the backbones and the introduction of added functional groups, researchers can regulate the shape and size of the cavity. The directionality of hydrogen bonding and the inherent rigidity of aromatic amide units allow researchers to predict both the shape and size of the cavity of an aromatic amide foldamer. Therefore, researchers can then design guest molecules with structure that matches the cavity shape, size, and binding sites of the foldamer host. In addition, because hydrogen bonds are dynamic, researchers can design structures that can adapt to outside stimuli to produce responsive supramolecular architectures. In this Account, we discuss how aromatic amide and hydrazide foldamers induced by hydrogen bonding can produce responsive host-guest systems, based on research by our group and others. First we highlight the helical chirality induced as binding occurs in solution, which includes the induction of helicity by chiral guests in oligomeric and polymeric foldamers, the formation of diastereomeric complexes between chiral foldamer hosts and guests, and the induction of helical chirality by chiral guests into inherently flexible backbones. In addition, molecular or ion-pair guests can produce supramolecular helical chirality in the organogel state. Such structures exhibit remarkable time-dependence and a "Sergeants and Soldiers" effect that are not observed for other two-component organogels that have been reported. We further illustrate that the reversible folding behavior of an aromatic amide foldamer segment can modulate the switching behavior of donor-acceptor interaction-based [2]rotaxanes. Finally we show that a folded oligomer can induce folding in one or two attached intrinsically flexible oligomers, an example of a solvent-responsive intramolecular host-guest system.
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Affiliation(s)
- Dan-Wei Zhang
- Department
of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Xin Zhao
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Zhan-Ting Li
- Department
of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
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50
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Galan JF, Germany E, Pawlowski A, Strickland L, Galinato MGI. Theoretical and spectroscopic analysis of N,N'-diphenylurea and N,N'-dimethyl-N,N'-diphenylurea conformations. J Phys Chem A 2014; 118:5304-15. [PMID: 24971844 DOI: 10.1021/jp503539m] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Structural organization of macromolecules is highly dependent on the conformational propensity of the monomer units. Our goal is to systematically quantify differences in the conformational propensities of aromatic oligourea foldamer units. Specifically, we investigate the conformational propensities of N,N'-diphenylurea and N,N'-dimethyl-N,N'-diphenylurea in different media using a combination of theoretical methods, and infrared and nuclear magnetic resonance spectroscopies. Our results show variation in the conformational behavior upon adding methyl substituents on N,N'-diphenylurea, and varying the environments surrounding the compounds. Our energetic analyses and conformational distributions in the gas phase show predominance of the cis-trans and trans-trans conformations for N,N'-diphenylurea, while cis-cis conformation is favored for N,N'-dimethyl-N,N'-diphenylurea. In solution, our results support the trans-trans conformer as the predominant conformer for N,N'-diphenylurea, whereas the cis-cis and cis-trans forms are favored in N,N'-dimethyl-N,N'-diphenylurea. N,N'-Dimethyl-N,N'-diphenylurea also exhibits a more dynamic conformational behavior in solution, with constant fluctuations between cis-cis and cis-trans conformations. Our detailed quantitative analyses are an important aspect in fine-tuning desired conformations and dynamic properties of this class of oligomers by providing a molecular basis for the behavior at the monomeric level.
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Affiliation(s)
- Jhenny F Galan
- Department of Marine Sciences, Texas A&M University at Galveston , 200 Seawolf Parkway, Galveston, Texas 77553, United States
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