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Groß P, Ihmels H. Synthesis of Fluorescent, DNA-Binding Benzo[ b]indolonaphthyridinium Derivatives by a Misguided Westphal Condensation. J Org Chem 2022; 87:4010-4017. [PMID: 35239355 DOI: 10.1021/acs.joc.1c02755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel type of azoniahetarene, namely, benzo[b]indolonaphthyridinium, was unexpectedly formed by the reaction of N-alkylated β-carbolinium derivatives and the enolizable 1,2-cyclohexadione under typical conditions of a Westphal reaction. The products exhibit high fluorescence intensities in polar solvents (Φfl = 0.52-0.67) and bind to DNA by intercalation with high affinity (Kb = 1.5 × 106 M-1). Furthermore, under the same conditions, DNA-binding sempervirine derivatives were synthesized in a Westphal reaction from 1,2-diketones that have at least one non-enolizable α-carbon atom, which shows that the reaction pathway is determined by the substrate structure.
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Affiliation(s)
- Philipp Groß
- Department of Chemistry and Biology Center of Micro- and Nanochemistry and (Bio)Technology (Cμ), University of Siegen, Adolf-Reichweinstr. 2, 57068 Siegen, Germany
| | - Heiko Ihmels
- Department of Chemistry and Biology Center of Micro- and Nanochemistry and (Bio)Technology (Cμ), University of Siegen, Adolf-Reichweinstr. 2, 57068 Siegen, Germany
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2
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Bartels F, Weber M, Christmann M. Synthesis of Spongidine A and D and Petrosaspongiolide L Methyl Ester Using Pyridine C-H Functionalization. Org Lett 2020; 22:552-555. [PMID: 31877051 DOI: 10.1021/acs.orglett.9b04315] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient strategy for the synthesis of the potent phospholipase A2 inhibitors spongidine A and D is presented. The tetracyclic core of the natural products was assembled via an intramolecular hydrogen atom transfer initiated Minisci reaction. A divergent late-stage functionalization of the tetracyclic ring system was also used to achieve a concise synthesis of petrosaspongiolide L methyl ester.
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Affiliation(s)
- Florian Bartels
- Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustraße 3 , 14195 Berlin , Germany
| | - Manuela Weber
- Institute of Chemistry and Biochemistry , Freie Universität Berlin , Fabeckstraße 34-36 , 14195 Berlin , Germany
| | - Mathias Christmann
- Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustraße 3 , 14195 Berlin , Germany
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Santra S, Khasanov AF, Mukherjee A, Rahman M, Kovalev IS, Kopchuk DS, Zyryanov GV, Majee A, Chupakhin ON, Charushin VN. Mono- and Polyazatriphenylene-Based Ligands: An Updated Library of Synthetic Strategies (2001-2018). European J Org Chem 2018. [DOI: 10.1002/ejoc.201800635] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Sougata Santra
- Department of Organic and Biomolecular Chemistry; Chemical Engineering Institute; Ural Federal University; 19 Mira Str. 620002 Yekaterinburg, K-2 Russian Federation
| | - Albert F. Khasanov
- Department of Organic and Biomolecular Chemistry; Chemical Engineering Institute; Ural Federal University; 19 Mira Str. 620002 Yekaterinburg, K-2 Russian Federation
| | - Anindita Mukherjee
- Department of Organic and Biomolecular Chemistry; Chemical Engineering Institute; Ural Federal University; 19 Mira Str. 620002 Yekaterinburg, K-2 Russian Federation
| | - Matiur Rahman
- Department of Organic and Biomolecular Chemistry; Chemical Engineering Institute; Ural Federal University; 19 Mira Str. 620002 Yekaterinburg, K-2 Russian Federation
| | - Igor S. Kovalev
- Department of Organic and Biomolecular Chemistry; Chemical Engineering Institute; Ural Federal University; 19 Mira Str. 620002 Yekaterinburg, K-2 Russian Federation
| | - Dmitry S. Kopchuk
- Department of Organic and Biomolecular Chemistry; Chemical Engineering Institute; Ural Federal University; 19 Mira Str. 620002 Yekaterinburg, K-2 Russian Federation
- I. Ya. Postovskiy Institute of Organic Synthesis; Ural Division of the Russian Academy of Sciences; 22 S. Kovalevskoy Str. 620219 Yekaterinburg Russian Federation
| | - Grigory V. Zyryanov
- Department of Organic and Biomolecular Chemistry; Chemical Engineering Institute; Ural Federal University; 19 Mira Str. 620002 Yekaterinburg, K-2 Russian Federation
- I. Ya. Postovskiy Institute of Organic Synthesis; Ural Division of the Russian Academy of Sciences; 22 S. Kovalevskoy Str. 620219 Yekaterinburg Russian Federation
| | - Adinath Majee
- Department of Chemistry; Visva-Bharati (A Central University); 731235 Santiniketan India
| | - Oleg N. Chupakhin
- Department of Organic and Biomolecular Chemistry; Chemical Engineering Institute; Ural Federal University; 19 Mira Str. 620002 Yekaterinburg, K-2 Russian Federation
- I. Ya. Postovskiy Institute of Organic Synthesis; Ural Division of the Russian Academy of Sciences; 22 S. Kovalevskoy Str. 620219 Yekaterinburg Russian Federation
| | - Valery N. Charushin
- Department of Organic and Biomolecular Chemistry; Chemical Engineering Institute; Ural Federal University; 19 Mira Str. 620002 Yekaterinburg, K-2 Russian Federation
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4
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Development of a genetically encodable FRET system using fluorescent RNA aptamers. Nat Commun 2018; 9:18. [PMID: 29295996 PMCID: PMC5750238 DOI: 10.1038/s41467-017-02435-x] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 11/30/2017] [Indexed: 12/21/2022] Open
Abstract
Fluorescent RNA aptamers are useful as markers for tracking RNA molecules inside cells and for creating biosensor devices. Förster resonance energy transfer (FRET) based on fluorescent proteins has been used to detect conformational changes, however, such FRET devices have not yet been produced using fluorescent RNA aptamers. Here we develop an RNA aptamer-based FRET (apta-FRET) system using single-stranded RNA origami scaffolds. To obtain FRET, the fluorescent aptamers Spinach and Mango are placed in close proximity on the RNA scaffolds and a new fluorophore is synthesized to increase spectral overlap. RNA devices that respond to conformational changes are developed, and finally, apta-FRET constructs are expressed in E. coli where FRET is observed, demonstrating that the apta-FRET system is genetically encodable and that the RNA nanostructures fold correctly in bacteria. We anticipate that the RNA apta-FRET system could have applications as ratiometric sensors for real-time studies in cell and synthetic biology. FRET has been used to study protein conformational changes but has never been applied to RNA aptamers. Here the authors develop a genetically encodable RNA aptamer-based FRET system on single-stranded RNA origami scaffolds, and demonstrate it can be used to study RNA conformational changes.
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Yao H, Chang L, Liu C, Jiao X, He S, Liu H, Zeng X. A Novel Styryldehydropyridocolinium Homodimer: Synthesis and Fluorescence Properties Upon Interaction with DNA. J Fluoresc 2015; 25:1637-43. [PMID: 26384336 DOI: 10.1007/s10895-015-1650-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Accepted: 09/09/2015] [Indexed: 11/27/2022]
Abstract
A novel homodimer of the styryldehydropyridocolinium dye (TPTP) has been synthesized and characterized. Free TPTP exhibited low fluorescence quantum yield and large Stokes shift (over 160 nm) in water. However, it showed a significant fluorescence turn-on effect upon intercalation into DNA base pairs. Meanwhile, the fluorescence intensity of the intercalated structures formed by TPTP and DNA decreased quickly upon addition of deoxyribonuclease I, indicating that the dye can be used to monitor deoxyribonuclease I activity and DNA hydrolysis. Electrophoresis analysis revealed that the dye had intercalative binding to DNA and can potentially be used for DNA staining in electrophoresis. Thus, the innate nature of large Stokes shift and excellent fluorescence turn on effect upon interaction with DNA endue the dye with a wide range of applications.
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Affiliation(s)
- Huirong Yao
- Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Material Science & Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Lifang Chang
- Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Material Science & Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Chang Liu
- Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Material Science & Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Xiaojie Jiao
- Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Material Science & Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Song He
- Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Material Science & Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Haijun Liu
- Tianjin Institute of Animal Science and Veterinary Medicine, Tianjin, 300112, China
| | - Xianshun Zeng
- Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Material Science & Engineering, Tianjin University of Technology, Tianjin, 300384, China.
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Luo CZ, Gandeepan P, Cheng CH. A convenient synthesis of quinolizinium salts through Rh(III) or Ru(II)-catalyzed C-H bond activation of 2-alkenylpyridines. Chem Commun (Camb) 2014; 49:8528-30. [PMID: 23938459 DOI: 10.1039/c3cc45004j] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient synthesis of quinolizinium salts from 2-vinylpyridines and alkynes via Rh(III) or Ru(II)-catalyzed C-H activation and annulation reaction is described. A possible mechanism involving pyridine assisted vinylic ortho-C-H activation, alkyne insertion and reductive elimination is proposed.
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Affiliation(s)
- Ching-Zong Luo
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan.
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Chen Z, Zhang S, Qi X, Liu S, Zhang Q, Deng Y. Fluorescent quinolizinium ionic liquids (salts) with unexpectedly high quantum yields up to >99%. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11556a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Interaction of (z)-4-bromo-1,3-di(2-thienyl)- 2-buten-1-one with amines, synthesis of di(2-thienyl)azolo[a]pyridines. Chem Heterocycl Compd (N Y) 2010. [DOI: 10.1007/s10593-010-0578-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Yan CG, Wang QF, Song XK, Sun J. One-Step Synthesis of Pyrido[1,2-a]benzimidazole Derivatives by a Novel Multicomponent Reaction of Chloroacetonitrile, Malononitrile, Aromatic Aldehyde, and Pyridine. J Org Chem 2008; 74:710-8. [DOI: 10.1021/jo802166t] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chao Guo Yan
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Qi Fang Wang
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Xiao Kai Song
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Jing Sun
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
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Affiliation(s)
- Roland E Dolle
- Department of Chemistry, Adolor Corporation, 700 Pennsylvania Drive, Exton, Pennsylvania 19341, USA.
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