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Cao R, Rossdeutcher RB, Wu X, Gong B. Oligo(5-amino- N-acylanthranilic acids): Amide Bond Formation without Coupling Reagent and Folding upon Binding Anions. Org Lett 2020; 22:7496-7501. [PMID: 32959659 DOI: 10.1021/acs.orglett.0c02696] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Oligomers of 5-amino-N-acylanthranilic acid, previously unknown aromatic oligoamides that cannot be obtained with known amide coupling methods, are synthesized based on a new, highly efficient amide-bond formation strategy that takes advantage of the ring-opening of benzoxazinone derivatives. These oligoamides offer multiple backbone NH groups as H-bond donors which, in the presence of iodide or chloride ion, are convergently arranged and H-bonded, which enforces a folded, crescent conformation. These aromatic oligoamides provide a versatile platform based on which anion-dependent foldamers, or anion binders with tunable affinity and specificity, are being constructed.
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Affiliation(s)
- Ruikai Cao
- Department of Chemistry, University at Buffalo, the State University of New York, Buffalo, New York 14260, United States
| | - Robert B Rossdeutcher
- Department of Chemistry, University at Buffalo, the State University of New York, Buffalo, New York 14260, United States
| | - Xiangxiang Wu
- Academy of Chinese Medical Science, Henan University of Chinese Medicine, 156 Jinshui East Road, Zhengzhou 450046, Henan, China
| | - Bing Gong
- Department of Chemistry, University at Buffalo, the State University of New York, Buffalo, New York 14260, United States
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Zhang Y, Zhong Y, Connor AL, Miller DP, Cao R, Shen J, Song B, Baker ES, Tang Q, Pulavarti SVSRK, Liu R, Wang Q, Lu ZL, Szyperski T, Zeng H, Li X, Smith RD, Zurek E, Zhu J, Gong B. Folding and Assembly of Short α, β, γ-Hybrid Peptides: Minor Variations in Sequence and Drastic Differences in Higher-Level Structures. J Am Chem Soc 2019; 141:14239-14248. [DOI: 10.1021/jacs.9b06094] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Yukun Zhang
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yulong Zhong
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Alan L. Connor
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Daniel P. Miller
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Ruikai Cao
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Jie Shen
- The NanoBio Lab, 31 Biopolis Way, The Nanos 138669, Singapore
| | - Bo Song
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - Erin S. Baker
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Quan Tang
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Surya V. S. R. K. Pulavarti
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Rui Liu
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Qiwei Wang
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Zhong-lin Lu
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Thomas Szyperski
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Huaqiang Zeng
- The NanoBio Lab, 31 Biopolis Way, The Nanos 138669, Singapore
| | - Xiaopeng Li
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - Richard D. Smith
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Eva Zurek
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Jin Zhu
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Bing Gong
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
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Arrata I, Grison CM, Coubrough HM, Prabhakaran P, Little MA, Tomlinson DC, Webb ME, Wilson AJ. Control of conformation in α-helix mimicking aromatic oligoamide foldamers through interactions between adjacent side-chains. Org Biomol Chem 2019; 17:3861-3867. [PMID: 30938392 DOI: 10.1039/c9ob00123a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The design, synthesis and structural characterization of non-natural oligomers that adopt well-defined conformations, so called foldamers, is a key objective in developing biomimetic 3D functional architectures. For the aromatic oligoamide foldamer family, use of interactions between side-chains to control conformation is underexplored. The current manuscript addresses this objective through the design, synthesis and conformational analyses of model dimers derived from 3-O-alkylated para-aminobenzoic acid monomers. The O-alkyl groups on these foldamers are capable of adopting syn- or anti-conformers through rotation around the Ar-CO/NH axes. In the syn-conformation this allows the foldamer to act as a topographical mimic of the α-helix whereby the O-alkyl groups mimic the spatial orientation of the i and i + 4 side-chains from the α-helix. Using molecular modelling and 2D NMR analyses, this work illustrates that covalent links and hydrogen-bonding interactions between side-chains can bias the conformation in favour of the α-helix mimicking syn-conformer, offering insight that may be more widely applied to control secondary structure in foldamers.
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Affiliation(s)
- Irene Arrata
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.
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