1
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Chiba Y, Jin Z, Nakamura T, Nabeshima T. An Iron(II) Complex of a Tripodal 2,2´-Bipyridine with Perfluoroalkyl Linkers Showing Anion-Dependent fac/ mer Isomer Ratio. CHEM LETT 2022. [DOI: 10.1246/cl.220314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yusuke Chiba
- Faculty of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
| | - Zhehui Jin
- Faculty of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
| | - Takashi Nakamura
- Faculty of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
| | - Tatsuya Nabeshima
- Faculty of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
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2
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Grajda M, Staros G, Jędrzejewska H, Szumna A. Toward Coordination Cages with Hybrid Chirality: Amino Acid-Induced Chirality on Metal Centers. Inorg Chem 2022; 61:11410-11418. [PMID: 35815508 PMCID: PMC9490811 DOI: 10.1021/acs.inorgchem.2c01738] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Tripodal chiral ligands containing amino acid residues
and salicyl-acylhydrazone
units were synthesized and used to obtain coordination cages through
deprotonation and coordination to gallium. These coordination cages
have Ga3L2 stoichiometry and pinwheel geometry
with two types of chiral centers built into their walls: stereogenic
centers at the amino acid backbones and stereoselectively induced
centers at metal ions. The pinwheel geometry is unique among analogous
cages and originates from the partial flexibility of the ligands.
Despite the flexibility, the ligands induce the chirality of metal
centers in a highly stereoselective way, leading to the formation
of cages that are single diastereoisomers. It has also been demonstrated
that stereoselectivity is a unique feature of cage geometry and leads
to effective chiral self-sorting: homochiral cages can be obtained
selectively from the mixtures of racemic ligands. The configuration
of metal centers was determined by circular dichroism, TD DFT calculation,
and X-ray crystallography. Tridentate
ligands containing chiral amino acids were used
to synthesize coordination cages with gallium ions. Chiral induction
on metal centers and chiral self-sorting were observed.
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Affiliation(s)
- Marcin Grajda
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Grzegorz Staros
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Hanna Jędrzejewska
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Agnieszka Szumna
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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3
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Kubik S. Synthetic Receptors Based on Abiotic Cyclo(pseudo)peptides. Molecules 2022; 27:2821. [PMID: 35566168 PMCID: PMC9103335 DOI: 10.3390/molecules27092821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 04/26/2022] [Accepted: 04/27/2022] [Indexed: 11/17/2022] Open
Abstract
Work on the use of cyclic peptides or pseudopeptides as synthetic receptors started even before the field of supramolecular chemistry was firmly established. Research initially focused on the development of synthetic ionophores and involved the use of macrocycles with a repeating sequence of subunits along the ring to facilitate the correlation between structure, conformation, and binding properties. Later, nonnatural amino acids as building blocks were also considered. With growing research in this area, cyclopeptides and related macrocycles developed into an important and structurally diverse receptor family. This review provides an overview of these developments, starting from the early years. The presented systems are classified according to characteristic structural elements present along the ring. Wherever possible, structural aspects are correlated with binding properties to illustrate how natural or nonnatural amino acids affect binding properties.
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Affiliation(s)
- Stefan Kubik
- Fachbereich Chemie-Organische Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
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4
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Morita H, Akine S, Nakamura T, Nabeshima T. Exclusive formation of a meridional complex of a tripodand and perfect suppression of guest recognition. Chem Commun (Camb) 2021; 57:2124-2127. [PMID: 33538748 DOI: 10.1039/d1cc00146a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Tripodal ligands have been utilized for complexation-induced structural change, but all the tripodal complexes reported so far are facial isomers, which do not completely reduce the recognition ability by closing the binding pocket. We now report the first example of the selective synthesis of a meridional tripodal complex. The tripodal ligand with a 1,3,5-triethyl-2,4,6-tris(methylene)benzene pivot possessing 2,2'-bipyridine on each arm exclusively formed a mononuclear complex with the mer-[Fe(bpy)]2+ unit. The meridional tripodal complex has a unique structure in which one bipyridine unit is self-penetrated. As a result of cavity blockage, the ion recognition property of the tripodand has been successfully suppressed.
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Affiliation(s)
- Hiroki Morita
- Faculty of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
| | - Shigehisa Akine
- Graduate School of Natural Science and Technology and WPI Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Takashi Nakamura
- Faculty of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
| | - Tatsuya Nabeshima
- Faculty of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
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5
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Abstract
This Review is devoted to the chemistry of macrocyclic peptides having heterocyclic fragments in their structure. These motifs are present in many natural products and synthetic macrocycles designed against a particular biochemical target. Thiazole and oxazole are particularly common constituents of naturally occurring macrocyclic peptide molecules. This frequency of occurrence is because the thiazole and oxazole rings originate from cysteine, serine, and threonine residues. Whereas other heteroaryl groups are found less frequently, they offer many insightful lessons that range from conformational control to receptor/ligand interactions. Many options to develop new and improved technologies to prepare natural products have appeared in recent years, and the synthetic community has been pursuing synthetic macrocycles that have no precedent in nature. This Review attempts to summarize progress in this area.
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Affiliation(s)
- Ivan V Smolyar
- Department of Chemistry , Moscow State University , Leninskije Gory , 199991 Moscow , Russia
| | - Andrei K Yudin
- Davenport Research Laboratories, Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| | - Valentine G Nenajdenko
- Department of Chemistry , Moscow State University , Leninskije Gory , 199991 Moscow , Russia
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6
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Brown RT, Fletcher NC, Danos L, Halcovitch NR. A Tripodal Ruthenium(II) Polypyridyl Complex with pH Controlled Emissive Quenching. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800891] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rodney T. Brown
- School of Chemistry and Chemical Engineering; Queen's University Belfast; BT9 5AG Belfast Northern Ireland UK
| | - Nicholas C. Fletcher
- Department of Chemistry; Lancaster University; Bailrigg 4YB Lancaster, LA1 UK
- School of Chemistry and Chemical Engineering; Queen's University Belfast; BT9 5AG Belfast Northern Ireland UK
| | - Lefteris Danos
- Department of Chemistry; Lancaster University; Bailrigg 4YB Lancaster, LA1 UK
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7
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8
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Przybyla D, Nubbemeyer U. 4,5-Disubstituted N
-Methylimidazoles as Versatile Building Blocks for Defined Side-Chain Introduction. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601384] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Daniel Przybyla
- Department of Organic Chemistry; Johannes Gutenberg University Mainz; Duesbergweg 12-14 55118 Mainz Germany
| | - Udo Nubbemeyer
- Department of Organic Chemistry; Johannes Gutenberg University Mainz; Duesbergweg 12-14 55118 Mainz Germany
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9
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Nakamura T, Kimura H, Okuhara T, Yamamura M, Nabeshima T. A Hierarchical Self-Assembly System Built Up from Preorganized Tripodal Helical Metal Complexes. J Am Chem Soc 2016; 138:794-7. [PMID: 26744899 DOI: 10.1021/jacs.5b12752] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The hierarchical organization strategy has realized elaborate supramolecular structures that are difficult to achieve by a one-pot thermodynamically driven self-assembly. Self-assembly via Schiff base formation of the preorganized tripodal helical unit 2(2+), which is composed of the tris(bipyridyl) ligand 1 and octahedral metal ion (Ru(II) and Fe(II)), lead to two supramolecular structures, i.e., a macrobicyclic dimer and an interlocked helicate. Notably, the interlocked helicate had a unique motif with an elongated shape (∼ 58 Å) and linearly aligned metal centers with homochiral configurations (all-Δ or all-Λ), which shows potential for allosteric regulation based on the long-range transmittance of the structural information.
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Affiliation(s)
- Takashi Nakamura
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba , 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
| | - Hikaru Kimura
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba , 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
| | - Takashi Okuhara
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba , 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
| | - Masaki Yamamura
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba , 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
| | - Tatsuya Nabeshima
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba , 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
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10
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Zhang LJ, Xu MC, Liu J, Zhang XM. Tandem cycloaddition–decarboxylation of α-keto acid and isocyanide under oxidant-free conditions towards monosubstituted oxazoles. RSC Adv 2016. [DOI: 10.1039/c6ra16031j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
An efficient method, tandem [3 + 2] cycloaddition–decarboxylation of α-keto acid and isocyanide promoted by copper salt, has been developed for constructing monosubstituted oxazole. The elegant approach ingeniously avoids consuming excess oxidants.
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Affiliation(s)
- Ling-Juan Zhang
- School of Chemistry & Material Science
- Shanxi Normal University
- Linfen
- P. R. China
| | - Mei-Chen Xu
- School of Chemistry & Material Science
- Shanxi Normal University
- Linfen
- P. R. China
| | - Jie Liu
- School of Chemistry & Material Science
- Shanxi Normal University
- Linfen
- P. R. China
| | - Xian-Ming Zhang
- School of Chemistry & Material Science
- Shanxi Normal University
- Linfen
- P. R. China
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11
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Ma Y, Yan Z, Bian C, Li K, Zhang X, Wang M, Gao X, Zhang H, Lei A. Synthesis of oxazoles by silver catalysed oxidative decarboxylation–cyclization of α-oxocarboxylates and isocyanides. Chem Commun (Camb) 2015; 51:10524-7. [DOI: 10.1039/c5cc02253c] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
This work developed a silver catalysed synthesis of oxazoles by the oxidative decarboxylation–cyclization of α-oxocarboxylates and isocyanides.
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Affiliation(s)
- Yiyang Ma
- College of Chemistry and Molecular Sciences
- The Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan
- P. R. China
| | - Zhiyuan Yan
- College of Chemistry and Molecular Sciences
- The Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan
- P. R. China
| | - Changliang Bian
- College of Chemistry and Molecular Sciences
- The Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan
- P. R. China
| | - Ke Li
- College of Chemistry and Molecular Sciences
- The Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan
- P. R. China
| | - Xiaowen Zhang
- College of Chemistry and Molecular Sciences
- The Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan
- P. R. China
| | - Mengfan Wang
- College of Chemistry and Molecular Sciences
- The Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan
- P. R. China
| | - Xinlong Gao
- College of Chemistry and Molecular Sciences
- The Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan
- P. R. China
| | - Heng Zhang
- College of Chemistry and Molecular Sciences
- The Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan
- P. R. China
| | - Aiwen Lei
- College of Chemistry and Molecular Sciences
- The Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan
- P. R. China
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12
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Echeverria PG, Cornil J, Férard C, Guérinot A, Cossy J, Phansavath P, Ratovelomanana-Vidal V. Asymmetric transfer hydrogenation of α-amino β-keto ester hydrochlorides through dynamic kinetic resolution. RSC Adv 2015. [DOI: 10.1039/c5ra10385a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The development of Ru-catalyzed asymmetric transfer hydrogenation of α-amino β-keto ester hydrochlorides is described.
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Affiliation(s)
| | - Johan Cornil
- Laboratoire de Chimie Organique
- Institute of Chemistry
- Biology and Innovation (CBI)-UMR 8231
- ESPCI ParisTech
- CNRS
| | - Charlène Férard
- Institut de Recherche de Chimie Paris. Chimie ParisTech
- CNRS
- PSL Research University
- 75005 Paris
- France
| | - Amandine Guérinot
- Laboratoire de Chimie Organique
- Institute of Chemistry
- Biology and Innovation (CBI)-UMR 8231
- ESPCI ParisTech
- CNRS
| | - Janine Cossy
- Laboratoire de Chimie Organique
- Institute of Chemistry
- Biology and Innovation (CBI)-UMR 8231
- ESPCI ParisTech
- CNRS
| | - Phannarath Phansavath
- Institut de Recherche de Chimie Paris. Chimie ParisTech
- CNRS
- PSL Research University
- 75005 Paris
- France
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13
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Haberhauer G, Kallweit C, Wölper C, Bläser D. Eine in ein Cyclopeptid eingebettete Azobenzol-Einheit als Schalter mit vorgegebener Richtung und Art der Bewegung. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301516] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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14
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Haberhauer G, Kallweit C, Wölper C, Bläser D. An azobenzene unit embedded in a cyclopeptide as a type-specific and spatially directed switch. Angew Chem Int Ed Engl 2013; 52:7879-82. [PMID: 23784864 DOI: 10.1002/anie.201301516] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 04/04/2013] [Indexed: 01/23/2023]
Abstract
By embedding an azobenzene unit into a chiral scaffold, switching of azobenzene from the trans-(P) isomer to the cis-(P) isomer and back was achieved (black arrows in picture). The embedding leads to a flipping process in which the phenyl rings can only move directly towards one another in the switching process.
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Affiliation(s)
- Gebhard Haberhauer
- Institut für Organische Chemie, Fakultät für Chemie, Universität Duisburg-Essen, Universitätsstrasse 7, 45117 Essen, Germany.
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15
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Duprey JLHA, Takezawa Y, Shionoya M. Metal-locked DNA three-way junction. Angew Chem Int Ed Engl 2012; 52:1212-6. [PMID: 23238966 DOI: 10.1002/anie.201207338] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Indexed: 02/04/2023]
Affiliation(s)
- Jean-Louis H A Duprey
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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16
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17
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Dong Y, Loong DT, Yuen AK, Black RJ, O'Malley S, Clegg JK, Lindoy LF, Jolliffe KA. Molecular capsules and coordination polymers from a backbone-modified cyclic peptide bearing pyridyl arms. Supramol Chem 2012. [DOI: 10.1080/10610278.2012.688128] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Ying Dong
- a School of Chemistry, The University of Sydney , 2006 NSW , Australia
| | - David T.J. Loong
- a School of Chemistry, The University of Sydney , 2006 NSW , Australia
| | - Alex K.L. Yuen
- a School of Chemistry, The University of Sydney , 2006 NSW , Australia
| | - Richard J. Black
- a School of Chemistry, The University of Sydney , 2006 NSW , Australia
| | - Shane O'Malley
- a School of Chemistry, The University of Sydney , 2006 NSW , Australia
| | - Jack K. Clegg
- a School of Chemistry, The University of Sydney , 2006 NSW , Australia
| | - Leonard F. Lindoy
- a School of Chemistry, The University of Sydney , 2006 NSW , Australia
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18
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Nagasawa K, Iida K, Majima S, Ohtake T, Tera M, Shin-ya K. Design and Synthesis of G-Quadruplex Ligands Bearing Macrocyclic Hexaoxazoles with Four-Way Side Chains. HETEROCYCLES 2012. [DOI: 10.3987/com-11-s(p)88] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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Butler SJ, Jolliffe KA, Lee WYG, McDonough MJ, Reynolds AJ. Synthesis of backbone modified cyclic peptides bearing dipicolylamino sidearms. Tetrahedron 2011. [DOI: 10.1016/j.tet.2010.11.100] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Molina L, Moreno-Clavijo E, Moreno-Vargas AJ, Carmona AT, Robina I. Synthesis of a C3-Symmetric Furyl-Cyclopeptide Platform with Anion Recognition Properties. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000219] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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21
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Molina L, Moreno-Clavijo E, Moreno-Vargas AJ, Carmona AT, Robina I. New Methodology for the Stereoselective Synthesis of α-Furfurylamines from Sugars: Application to the Synthesis of Furyl Amino Acids and 3-Furylisoserines. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000183] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Boshta N, Bomkamp M, Schnakenburg G, Waldvogel S. Stereoselective Formation of Triphenylene Ketals. Chemistry 2010; 16:3459-66. [DOI: 10.1002/chem.200903249] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Albrecht M, Osetska O, Abel T, Haberhauer G, Ziegler E. An enantiomerically pure siderophore type ligand for the diastereoselective 1 : 1 complexation of lanthanide(III) ions. Beilstein J Org Chem 2009; 5:78. [PMID: 20300497 PMCID: PMC2839492 DOI: 10.3762/bjoc.5.78] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2009] [Accepted: 11/24/2009] [Indexed: 11/23/2022] Open
Abstract
A facile synthesis of a highly preorganized tripodal enterobactine-type ligand 1a-H₃ consisting of a chiral C₃-symmetric macrocyclic peptide and three tridentate 2-amido-8-hydroxyquinoline coordinating units is presented. Complex formation with various metal ions (Al(³+), Ga(³+), Fe(³+), La(³+) and Eu(³+)) was investigated by spectrophotometric methods. Only in the case of La(³+) and Eu(³+) were well defined 1 : 1 complexes formed. On the basis of CD spectroscopy and DFT calculations the configuration at the metal centre of the La(³+) complex was determined to show Lambda helicity. The coordination compounds [(1a)Ln] presented should be prototypes for further lanthanide(III) complexes with an enterobactine analogue binding situation.
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Affiliation(s)
- Markus Albrecht
- Institut für Organische Chemie, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
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24
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Dannecker-Dörig I, Linden A, Heimgartner H. Synthesis of Aib-containing cyclopeptides via the ‘azirine/oxazolone method’. ACTA ACUST UNITED AC 2009. [DOI: 10.1135/cccc2009017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The cyclic pentapeptide cyclo[Gly-Phe(2Me)-Aib-Aib-Gly], containing three α,α-disubstituted α-amino acids, was prepared by cyclization of H-Gly-Phe(2Me)-Aib-Aib-Gly-OH with diphenyl phosporazidate (DPPA) in 60% yield. The synthesis of the linear precursor was performed by using the ‘azirine/oxazolone method’, in which the α,α-disubstituted α-amino acids were introduced by coupling of the corresponding amino or peptide acid with a 2,2-disubstituted 3-amino-2H-azirine. Whereas the cyclization of an analogous hexapeptide afforded the cyclopeptide in 42% yield, the corresponding tetrapeptide yielded a 1:2 mixture of the monomeric and dimeric cyclopeptide. In the case of the tripeptide H-Gly-Phe(2Me)-Aib-OH, the cyclization with DPPA led to the dimeric cyclohexapeptide exclusively.
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26
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Crassous J. Chiral transfer in coordination complexes: towards molecular materials. Chem Soc Rev 2009; 38:830-45. [DOI: 10.1039/b806203j] [Citation(s) in RCA: 347] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Pintér Á, Haberhauer G. Synthesis and Investigation of a Chiral Enterobactin Analogue Based on a Macrocyclic Peptide Scaffold. Chemistry 2008; 14:11061-8. [DOI: 10.1002/chem.200801552] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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