1
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Szychta K, Koszarna B, Banasiewicz M, Sobolewski A, O’Mari O, Clark JA, Vullev VI, Barboza CA, Gryko DT. Conformation of the Ester Group Governs the Photophysics of Highly Polarized Benzo[ g]coumarins. JACS AU 2023; 3:1918-1930. [PMID: 37502148 PMCID: PMC10369411 DOI: 10.1021/jacsau.3c00169] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 06/10/2023] [Accepted: 06/13/2023] [Indexed: 07/29/2023]
Abstract
Photosensitizers that display "unusual" emission from upper electronically excited states offer possibilities for initiating higher-energy processes than what the governing Kasha's rule postulates. Achieving conditions for dual fluorescence from multiple states of the same species requires molecular design and conditions that favorably tune the excited-state dynamics. Herein, we switch the position of the electron-donating NMe2 group around the core of benzo[g]coumarins (BgCoum) and tune the electronic coupling and the charge-transfer character of the fluorescent excited states. For solvents with intermediate polarity, three of the four regioisomers exhibit fluorescence from two different excited states with bands that are well separated in the visible and the near-infrared spectral regions. Computational analysis, employing ab initio methods, reveals that the orientation of an ester on the pyrone ring produces two conformers responsible for the observed dual fluorescence. Studies with solid solvating media, which restricts the conformational degrees of freedom, concur with the computational findings. These results demonstrate how "seemingly inconsequential" auxiliary substituents, such as the esters on the pyrone coumarin rings, can have profound effects leading to "anti-Kasha" photophysical behavior important for molecular photonics, materials engineering, and solar-energy science.
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Affiliation(s)
- Kamil Szychta
- Institute
of Organic Chemistry of Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Beata Koszarna
- Institute
of Organic Chemistry of Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Marzena Banasiewicz
- Institute
of Physics of Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland
| | - Andrzej Sobolewski
- Institute
of Physics of Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland
| | - Omar O’Mari
- Department
of Bioengineering, University of California, Riverside, California 92521, United States
| | - John A. Clark
- Department
of Bioengineering, University of California, Riverside, California 92521, United States
| | - Valentine I. Vullev
- Department
of Bioengineering, University of California, Riverside, California 92521, United States
- Department
of Chemistry, Department of Biochemistry, and Materials Science and
Engineering Program, University of California, Riverside, California 92521, United States
| | - Cristina A. Barboza
- Institute
of Physics of Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland
- Department
of Physical and Quantum Chemistry, Faculty of Chemistry, Wroclaw University of Science and Technology, Wrocław 50-370, Poland
| | - Daniel T. Gryko
- Institute
of Organic Chemistry of Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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2
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Kumar S, Prince, Gupta M, Lalji RSK, Singh BK. Microwave assisted regioselective halogenation of benzo[ b][1,4]oxazin-2-ones via sp 2 C-H functionalization. RSC Adv 2023; 13:2365-2371. [PMID: 36741130 PMCID: PMC9841512 DOI: 10.1039/d2ra07259a] [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: 11/15/2022] [Accepted: 12/28/2022] [Indexed: 01/18/2023] Open
Abstract
A microwave assisted, palladium-catalyzed regioselective halogenation of 3-phenyl-2H-benzo[b][1,4]oxazin-2-ones has been demonstrated using inexpensive and readily available N-halosuccinimide. The reaction utilizes the nitrogen atom present in the heterocyclic ring as the directing group to afford regioselective halogenated products in good to moderate yields. The established protocol provides wide substrate scope, high functional group tolerance, and high atom and step economy. The reaction proved to be cost-effective and time-saving as it required only a few minutes for completion and is amenable to gram scale. The halogen atoms present in synthesized products provide further scope for post-functionalization. Several post-functionalized products have also been synthesised to demonstrate the high utility of the reaction in the field of drug discovery and late-stage functionalization.
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Affiliation(s)
- Sandeep Kumar
- Bio-Organic Research Laboratory, Department of Chemistry, University of DelhiDelhi110007India
| | - Prince
- Bio-Organic Research Laboratory, Department of Chemistry, University of DelhiDelhi110007India
| | - Mohit Gupta
- Bio-Organic Research Laboratory, Department of Chemistry, University of DelhiDelhi110007India
| | - Ram Sunil Kumar Lalji
- Bio-Organic Research Laboratory, Department of Chemistry, University of DelhiDelhi110007India,Department of Chemistry, Kirori-mal College, Delhi UniversityDelhi110007India
| | - Brajendra K. Singh
- Bio-Organic Research Laboratory, Department of Chemistry, University of DelhiDelhi110007India
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3
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Ionic liquid-catalyzed synthesis of (1,4-benzoxazin-3-yl) malonate derivatives via cross-dehydrogenative-coupling reactions. HETEROCYCL COMMUN 2022. [DOI: 10.1515/hc-2022-0007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
A convenient C(sp3)–C(sp3) oxidative dehydrogenative coupling reaction of 1,4-benzoxazin-2-ones with malonate esters was developed under mild conditions to obtain the respective ester malonates in high yields. Reactions take place in [omim]FeCl4, acting as both the solvent and the catalyst. Under [omim]Cl/FeCl3-DDQ conditions, derivatives of 1 coupled with malonate 2 to give the target molecules within 1–2 h time periods. The ionic liquid was recovered and reused in the next reactions without losing its efficiency.
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4
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Rusanov AI, Dmitrieva OA, Mamardashvili NZ, Tetko IV. More Is Not Always Better: Local Models Provide Accurate Predictions of Spectral Properties of Porphyrins. Int J Mol Sci 2022. [DOI: https://doi.org/10.3390/ijms23031201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
The development of new functional materials based on porphyrins requires fast and accurate prediction of their spectral properties. The available models in the literature for absorption wavelength and extinction coefficient of the Soret band have low accuracy for this class of compounds. We collected spectral data for porphyrins to extend the literature set and compared the performance of global and local models for their modelling using different machine learning methods. Interestingly, extension of the public database contributed models with lower accuracies compared to the models, which we built using porphyrins only. The later model calculated acceptable RMSE = 2.61 for prediction of the absorption band of 335 porphyrins synthesized in our laboratory, but had a low accuracy (RMSE = 0.52) for extinction coefficient. A development of models using only compounds from our laboratory significantly decreased errors for these compounds (RMSE = 0.5 and 0.042 for absorption band and extinction coefficient, respectively), but limited their applicability only to these homologous series. When developing models, one should clearly keep in mind their potential use and select a strategy that could contribute the most accurate predictions for the target application. The models and data are publicly available.
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5
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Rusanov AI, Dmitrieva OA, Mamardashvili NZ, Tetko IV. More Is Not Always Better: Local Models Provide Accurate Predictions of Spectral Properties of Porphyrins. Int J Mol Sci 2022; 23:ijms23031201. [PMID: 35163123 PMCID: PMC8835262 DOI: 10.3390/ijms23031201] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 01/19/2022] [Indexed: 02/05/2023] Open
Abstract
The development of new functional materials based on porphyrins requires fast and accurate prediction of their spectral properties. The available models in the literature for absorption wavelength and extinction coefficient of the Soret band have low accuracy for this class of compounds. We collected spectral data for porphyrins to extend the literature set and compared the performance of global and local models for their modelling using different machine learning methods. Interestingly, extension of the public database contributed models with lower accuracies compared to the models, which we built using porphyrins only. The later model calculated acceptable RMSE = 2.61 for prediction of the absorption band of 335 porphyrins synthesized in our laboratory, but had a low accuracy (RMSE = 0.52) for extinction coefficient. A development of models using only compounds from our laboratory significantly decreased errors for these compounds (RMSE = 0.5 and 0.042 for absorption band and extinction coefficient, respectively), but limited their applicability only to these homologous series. When developing models, one should clearly keep in mind their potential use and select a strategy that could contribute the most accurate predictions for the target application. The models and data are publicly available.
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Affiliation(s)
- Aleksey I. Rusanov
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 153045 Ivanovo, Russia; (A.I.R.); (O.A.D.); (N.Z.M.)
| | - Olga A. Dmitrieva
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 153045 Ivanovo, Russia; (A.I.R.); (O.A.D.); (N.Z.M.)
| | - Nugzar Zh. Mamardashvili
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 153045 Ivanovo, Russia; (A.I.R.); (O.A.D.); (N.Z.M.)
| | - Igor V. Tetko
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 153045 Ivanovo, Russia; (A.I.R.); (O.A.D.); (N.Z.M.)
- Helmholtz Munich, Institute of Structural Biology, Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH), D-85764 Neuherberg, Germany
- BIGCHEM GmbH, D-85716 Unterschleißheim, Germany
- Correspondence: ; Tel.: +49-89-3187-3575
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6
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Rusanov AI, Dmitrieva OA, Mamardashvili NZ, Tetko IV. More Is Not Always Better: Local Models Provide Accurate Predictions of Spectral Properties of Porphyrins. Int J Mol Sci 2022. [DOI: https:/doi.org/10.3390/ijms23031201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The development of new functional materials based on porphyrins requires fast and accurate prediction of their spectral properties. The available models in the literature for absorption wavelength and extinction coefficient of the Soret band have low accuracy for this class of compounds. We collected spectral data for porphyrins to extend the literature set and compared the performance of global and local models for their modelling using different machine learning methods. Interestingly, extension of the public database contributed models with lower accuracies compared to the models, which we built using porphyrins only. The later model calculated acceptable RMSE = 2.61 for prediction of the absorption band of 335 porphyrins synthesized in our laboratory, but had a low accuracy (RMSE = 0.52) for extinction coefficient. A development of models using only compounds from our laboratory significantly decreased errors for these compounds (RMSE = 0.5 and 0.042 for absorption band and extinction coefficient, respectively), but limited their applicability only to these homologous series. When developing models, one should clearly keep in mind their potential use and select a strategy that could contribute the most accurate predictions for the target application. The models and data are publicly available.
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7
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Cocco A, Caria P, Sanna G, Stagi L, Cadoni E, Corpino R, Ricci PC, Carbonaro CM, Secci F. Synthesis and Photophysical Properties of Fluorescent 6-Aryl-D-π-A Coumarin Derivatives. ACS OMEGA 2021; 6:33708-33716. [PMID: 34926919 PMCID: PMC8675031 DOI: 10.1021/acsomega.1c04810] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 11/10/2021] [Indexed: 06/14/2023]
Abstract
A series of 6-aryl coumarin dyes were synthesized in satisfactory yields by Pd-catalyzed Suzuki cross-coupling reactions with a panel of boronic acids and coumarin bromides. Photophysical studies highlighted a large Stoke shift and interesting fluorescence quantum yield for these compounds. Optical properties were also investigated with the aid of quantum chemical calculations. The treatment of selected coumarin dyes with increasing amounts of trifluoroacetic acid showed that their fluorescence can be strongly influenced by pH (fluorescence quenching at high acid concentrations), while the addition of Fe3+ and Al3+ metal ions allowed to highlight dichotomous behavior with the corresponding reduction in fluorescence with the increase of [Fe3+] or [Al3+]. Finally, biological assays and fluorescence microscopy imaging investigations indicated that these compounds can be used as potential biomarkers in living and fixed cells.
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Affiliation(s)
- Andrea Cocco
- Department
of Chemical and Geological Sciences, University
of Cagliari, Monserrato, 09042 Cagliari, Italy
| | - Paola Caria
- Department
of Biomedical Sciences, University of Cagliari, Monserrato, 09042 Cagliari, Italy
| | - Giuseppina Sanna
- Department
of Biomedical Sciences, University of Cagliari, Monserrato, 09042 Cagliari, Italy
| | - Luigi Stagi
- Department
of Chemistry and Pharmacy, Laboratory of Materials Science and Nanotechnology,
CR-INSTM, University of Sassari, via Vienna 2, 07100 Sassari, Italy
| | - Enzo Cadoni
- Department
of Chemical and Geological Sciences, University
of Cagliari, Monserrato, 09042 Cagliari, Italy
| | - Riccardo Corpino
- Department
of Physics, University of Cagliari, SP 8, Monserrato, 09042 Cagliari, Italy
| | - Pier Carlo Ricci
- Department
of Physics, University of Cagliari, SP 8, Monserrato, 09042 Cagliari, Italy
| | - Carlo Maria Carbonaro
- Department
of Physics, University of Cagliari, SP 8, Monserrato, 09042 Cagliari, Italy
| | - Francesco Secci
- Department
of Chemical and Geological Sciences, University
of Cagliari, Monserrato, 09042 Cagliari, Italy
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8
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Wang H, Schrage BR, Takematsu K, Ziegler CJ. Photophysical properties of a boron analogue of coumarin. Phys Chem Chem Phys 2021; 23:18855-18862. [PMID: 34612423 DOI: 10.1039/d1cp02386a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this report, we present a study into the structure and electronic properties of difluoroboronsalicylaldoxime (DFBS), a boron-based structural analog of coumarin. The modification of the heterocyclic ring of coumarin with boron results in a compound with similar structural parameters and molecular orbitals to coumarin. DFT and TDDFT calculations reveal a significant stabilization of the LUMO in DFBS; this is supported by a ∼40 nm red shift of the lowest electronic transition in the absorption spectrum. Interestingly, DFBS is emissive, while unmodified coumarin is effectively non-radiative. Comparisons between DFBS, emissive coumarin variants, and unmodified coumarin suggest that the charge transfer character of the transition contributes to the fluorescence.
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Affiliation(s)
- Huayi Wang
- Department of Chemistry, University of Akron, Akron, Ohio 44325-3601, USA.
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9
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Intramolecular oxidative rearrangement: I2/TBHP/DMSO-mediated metal free facile access to quinoxalinone derivatives. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Sun X, Xue Y, Li J, Yang Y, Bai Y, Chen Y. Fluorescent labeling and characterization of dicarboxylic cellulose nanocrystals prepared by sequential periodate-chlorite oxidation. RSC Adv 2021; 11:24694-24701. [PMID: 35481032 PMCID: PMC9036875 DOI: 10.1039/d1ra04812k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 07/08/2021] [Indexed: 12/19/2022] Open
Abstract
High-performance fluorescent composites are key to the development and improvement of fluorescent molecular probe technology. In this study, cellulose nanocrystals (CNC) with high carboxyl concentrations were prepared via sequential periodate-chlorite oxidation. Then, fluorescent cellulose nanocrystals (FCNC) were prepared by attaching 7-amino-4-methylcoumarin (AMC) onto CNC under 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride (DMTMM) catalysis. The morphology and fluorescence properties of FCNC were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, elemental analysis, ultraviolet-visible absorbance, fluorescence spectrophotometry, and fluorescence spectroscopy. The results showed that AMC was grafted onto the CNC surface by an amidation reaction, and the absorption and emission maxima for FCNC were blue-shifted from 350 nm and 445 nm of AMC to 335 nm and 440 nm, respectively. FCNC retained the crystallinity and nano-topography size of the CNC. The fluorescence intensity, quantum yield, and fluorescence lifetime of FCNC showed the same change law; it first increased and then decreased with an increase in the graft density of AMC from 0.201 to 0.453 AMC molecules per nm2. The FCNC prepared in this study have good optical properties and can be used in the fields of fluorescent molecular probes and biological imaging.
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Affiliation(s)
- Xiaozheng Sun
- College of Engineering, Northeast Agricultural University No. 600 Changjiang Street HarBin 150030 China
| | - Yanhua Xue
- College of Engineering, Northeast Agricultural University No. 600 Changjiang Street HarBin 150030 China
| | - Jianye Li
- College of Engineering, Northeast Agricultural University No. 600 Changjiang Street HarBin 150030 China
| | - Yu Yang
- College of Engineering, Northeast Agricultural University No. 600 Changjiang Street HarBin 150030 China
| | - Yu Bai
- College of Engineering, Northeast Agricultural University No. 600 Changjiang Street HarBin 150030 China
| | - Yujia Chen
- College of Engineering, Northeast Agricultural University No. 600 Changjiang Street HarBin 150030 China
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11
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Colas K, Doloczki S, Posada Urrutia M, Dyrager C. Prevalent Bioimaging Scaffolds: Synthesis, Photophysical Properties and Applications. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001658] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kilian Colas
- Department of Chemistry – BMC Uppsala University Box 576 75123 Uppsala Sweden
| | - Susanne Doloczki
- Department of Chemistry – BMC Uppsala University Box 576 75123 Uppsala Sweden
| | | | - Christine Dyrager
- Department of Chemistry – BMC Uppsala University Box 576 75123 Uppsala Sweden
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12
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Ni H, Li Y, Deng J, Shi X, Pan Q. Visible-light-promoted/PIFA-mediated direct C–H acylation of quinoxalin-2(1 H)-ones with aldehydes. NEW J CHEM 2021. [DOI: 10.1039/d1nj04805h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
With aldehydes as the radical precursors under visible-light irradiation, a simple and mild PIFA-mediated C–H acylation reaction of quinoxalin-2(1H)-ones has been achieved.
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Affiliation(s)
- Hangcheng Ni
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, Chengdu University, Jinhua, 321007, People's Republic of China
- College of Pharmacy, Jinhua Polytechnic, Jinhua, 321007, People's Republic of China
| | - Yu Li
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, Chengdu University, Jinhua, 321007, People's Republic of China
| | - Jieyi Deng
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, Chengdu University, Jinhua, 321007, People's Republic of China
| | - Xingzi Shi
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, Chengdu University, Jinhua, 321007, People's Republic of China
| | - Qinhai Pan
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, People's Republic of China
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13
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Palmieri A. Synthesis of Heterocyclic Systems Starting from Carbonyl and Carboxyl Functionalized Nitro Compounds by One-Pot Processes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000079] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Alessandro Palmieri
- Green Chemistry Group; School of Science and Technology; Chemistry Division; University of Camerino; Via S. Agostino n. 1 62032 Camerino Italy
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14
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Lu J, He X, Cheng X, Zhang A, Xu G, Xuan J. Photoredox Catalyst Free, Visible Light‐Promoted C3−H Acylation of Quinoxalin‐2(1
H
)‐ones in Water. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000116] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Juan Lu
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical EngineeringAnhui University Hefei, Anhui 230601 People's Republic of China
| | - Xiang‐Kui He
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical EngineeringAnhui University Hefei, Anhui 230601 People's Republic of China
| | - Xiao Cheng
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical EngineeringAnhui University Hefei, Anhui 230601 People's Republic of China
| | - Ai‐Jun Zhang
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical EngineeringAnhui University Hefei, Anhui 230601 People's Republic of China
| | - Guo‐Yong Xu
- Institute of Physical Science and Information TechnologyAnhui University Hefei, Anhui 230601 People's Republic of China
| | - Jun Xuan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical EngineeringAnhui University Hefei, Anhui 230601 People's Republic of China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University)Ministry of Education Hefei 230601 People's Republic of China
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15
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Kasagani VP, Kurma SH, Bhimapaka CR. Stereospecific Synthesis of 3,4-Dihydro-2 H-naphtho-1,4-oxazin-2-ones by Unification of Benzoxepine-4-carboxylates with Chiral Amino Acid Ethyl Esters. J Org Chem 2020; 85:2976-2983. [PMID: 31995711 DOI: 10.1021/acs.joc.9b02624] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel and efficient stereocontrolled method has been developed for the preparation of chiral 3,4-dihydro-2H-naphtho[1,2-b][1,4]oxazin-2-ones by the reaction of benzoxepine-4-carboxylates with chiral amino acid ethyl esters for the first time. The chiral 3,4-dihydro-2H-naphtho-1,4-oxazinones have been achieved in one step by the formation of C-N, C-C, and C-O bonds.
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Affiliation(s)
- Veera Prasad Kasagani
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
| | - Siva Hariprasad Kurma
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
| | - China Raju Bhimapaka
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
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16
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Li Y, Yu T, Su W, Wang Y, Zhao Y, Zhang H. Polycyclic aromatic hydrocarbon-bridged coumarin derivatives for organic light-emitting devices. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2019.05.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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17
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Kielesiński Ł, Gryko DT, Sobolewski AL, Morawski O. The Interplay between Solvation and Stacking of Aromatic Rings Governs Bright and Dark Sites of Benzo[g]coumarins. Chemistry 2019; 25:15305-15314. [PMID: 31523856 DOI: 10.1002/chem.201903018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 08/27/2019] [Indexed: 11/06/2022]
Abstract
Coumarins are classic, strongly polarized fluorophores with multiple applications, and significant efforts have been put into modifying their emission characteristics and elucidating their photophysics. Expecting that π-expansion of these donor-acceptor chromophores could modify their ground- and excited-state characteristics, the authors performed combined, detailed photophysical and computational studies of linearly π-expanded coumarins, that is, 8-dialkylamino-3-carboxyalkyl-benzo[g]coumarins. The investigation led to the conclusion that emission is only possible thanks to the stabilizing effect of the solvent and that breaking of the lactone ring leads to the conical intersection with the ground state and induces the radiationless decay of the electronic excitation. Aiming at the fine-tuning the excited state properties through the construction of covalently linked dye assemblies, the authors designed and synthesized a new bis(benzo[g]coumarin), built from two similar moieties that exhibit different degrees of polarization due to the electron donor at position 8: one possesses a dialkylamino, and the other a weaker amide donor. Comprehensive studies have shown that the observed weak fluorescence of the system is the result of the interplay between the solvation-induced separation of the benzo[g]coumarin moieties, which stabilizes the emitting locally excited singlet state and the π-stacking interactions, favoring their sandwiched orientation and leading to the non-emissive charge-transfer state.
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Affiliation(s)
- Łukasz Kielesiński
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland.,Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668, Warsaw, Poland
| | - Daniel T Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Andrzej L Sobolewski
- Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668, Warsaw, Poland
| | - Olaf Morawski
- Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668, Warsaw, Poland
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18
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Liang Z, Chen X, Li L, Li B, Yang Z. The fate of dietary advanced glycation end products in the body: from oral intake to excretion. Crit Rev Food Sci Nutr 2019; 60:3475-3491. [PMID: 31760755 DOI: 10.1080/10408398.2019.1693958] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Advanced glycation end products (AGEs), which are closely associated with various chronic diseases, are formed through the Maillard reaction when aldehydes react with amines in heated foods or in living organisms. The fate of dietary AGEs after oral intake plays a crucial role in regulating the association between dietary AGEs and their biological effects. However, the complexity and diversity of dietary AGEs make their fate ambiguous. Glycated modifications can impair the digestion, transport and uptake of dietary AGEs. High and low molecular weight AGEs may exhibit individual differences in their distribution, metabolism and excretion. Approximately 50-60% of free AGEs are excreted after dietary intake, whereas protein-bound AGEs exhibit a limited excretion rate. In this article, we summarize several AGE classification criteria and their abundance in foods, and in the body. A standardized static in vitro digestion method is strongly recommended to obtain comparable results of AGE digestibility. Sophisticated hypotheses regarding the intestinal transportation and absorption of drugs, as well as calculated physicochemical parameters, are expected to alleviate the difficulties determining the digestion, transport and uptake of dietary AGEs. Orally supplied AGEs with low or high molecular weights must be supported by well-defined amounts in investigations of excretion. Furthermore, unequivocal evidence should be obtained regarding the degradation and metabolism products of dietary AGEs.
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Affiliation(s)
- Zhili Liang
- School of Food Science, Guangdong Food and Drug Vocational College, Guangzhou, China
| | - Xu Chen
- Engineering Research Center of Health Food Design & Nutrition Regulation, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan, China
| | - Lin Li
- Engineering Research Center of Health Food Design & Nutrition Regulation, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan, China
| | - Bing Li
- School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou, China
| | - Zhao Yang
- School of Food Science, Guangdong Food and Drug Vocational College, Guangzhou, China
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19
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Li B, Zhang D, An R, Zhu Y. A 7-Hydroxybenzoxazinone-Containing Fluorescence Turn-On Probe for Biothiols and Its Bioimaging Applications. Molecules 2019; 24:E3102. [PMID: 31461829 PMCID: PMC6749190 DOI: 10.3390/molecules24173102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 08/22/2019] [Accepted: 08/26/2019] [Indexed: 02/04/2023] Open
Abstract
In this work, a novel 7-hydroxybenzoxazinone-based fluorescent probe (PBD) for the selective sensing of biothiols is reported. Upon treatment with biothiols, PBD shows a strong fluorescence enhancement (up to 70-fold) and a large Stokes shift (155 nm). Meanwhile, this probe exhibits high resistance to interference from other amino acids and competing species. PBD features good linearity ranges with a low detection limit of 14.5 nM for glutathione (GSH), 17.5 nM for cysteine (Cys), and 80.0 nM for homocysteine (Hcy), respectively. Finally, the potential utility of this probe for biothiol sensing in living HeLa cells is demonstrated.
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Affiliation(s)
- Bin Li
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), 3501 Daxue Road, Jinan 250353, China
| | - Datong Zhang
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), 3501 Daxue Road, Jinan 250353, China.
| | - Ruibing An
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), 3501 Daxue Road, Jinan 250353, China
| | - Yaling Zhu
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), 3501 Daxue Road, Jinan 250353, China
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20
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Zhao Y, Wang Y, Li X, Li Y, Wang Y, Yu T. Effects of phenothiazine and phenoxazine on photophysical properties of coumarin derivatives. CHEMICAL PAPERS 2019. [DOI: 10.1007/s11696-019-00882-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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21
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Kielesiński Ł, Morawski OW, Sobolewski AL, Gryko DT. The synthesis and photophysical properties of tris-coumarins. Phys Chem Chem Phys 2019; 21:8314-8325. [PMID: 30951072 DOI: 10.1039/c9cp00978g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A structurally unique cyclic tris-coumarin possessing three identical coumarin units bridged by amide linkers as well as two linear analogs has been synthesized. There is a remarkable agreement between crystallographic data, 1H NMR and results of calculations for the cyclic tris-coumarin, showing in all cases a non-symmetric arrangement of identical coumarin moieties. Weak polarization of the coumarin subunits, resulting from the presence of only CONH- groups as electron-donors, results in a hypsochromic shift of both absorption and emission in this dye. We have proven that in non-cyclic, head-to-tail linked tris-coumarins, the photophysics is controlled not only by the substituents but also by the conformation of the molecule, which in turn depends on the nature of the linker's interactions. These can be controlled by the presence/absence of an amide-type hydrogen atom responsible for the formation of intramolecular hydrogen bonds. The presence of a hydrogen bond favors a stretched trans conformation of the dye, while in its absence, folding of the molecule occurs leading to a more compact conformation. Although, the increased number of covalently linked coumarin units does not drastically change the preferred conformation, the fluorescence quantum yields of tris-coumarins are significantly lower than for analogous bis-coumarins composed of the same units.
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Affiliation(s)
- Łukasz Kielesiński
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
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22
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Kaur N. Synthesis of Three‐Membered and Four‐Membered Heterocycles with the Assistance of Photochemical Reactions. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3491] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Navjeet Kaur
- Department of Chemistry Banasthali Vidyapith Banasthali Rajasthan 304022 India
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23
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Li D, Ollevier T. Iron- or Zinc-Mediated Synthetic Approach to Enantiopure Dihydroquinoxalinones. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801639] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Dazhi Li
- Département de chimie; Université Laval; 1045 avenue de la Médecine Québec, QC, G1V 0A6 Canada
| | - Thierry Ollevier
- Département de chimie; Université Laval; 1045 avenue de la Médecine Québec, QC, G1V 0A6 Canada
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24
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Gonçalves DR, Manthey JA, da Costa PI, Rodrigues MCM, Cesar TB. Analysis of Fluorescence Spectra of Citrus Polymethoxylated Flavones and Their Incorporation into Mammalian Cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:7531-7541. [PMID: 29984997 DOI: 10.1021/acs.jafc.8b02052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Citrus polymethoxylated flavones (PMFs) influence biochemical cascades in human diseases, yet little is known about how these compounds interact with cells and how these associations influence the actions of these compounds. An innate attribute of PMFs is their ultraviolet-light-induced fluorescence, and the fluorescence spectra of 14 PMFs and 7 PMF metabolites were measured in methanol. These spectra were shown to be strongly influenced by the compounds' hydroxy and methoxy substituents. For a subset of these compounds, the fluorescence spectra were measured when bound to human carcinoma Huh7.5 cells. Emission-wavelength maxima of PMF metabolites with free hydroxyl substituents exhibited 70-80 nm red shifts when bound to the Huh7.5 cells. Notable solvent effects of water were observed for nearly all these compounds, and these influences likely reflect the effects of localized microenvironments on the resonance structures of these compounds when bound to human cells.
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Affiliation(s)
- Danielle R Gonçalves
- Department of Food and Nutrition, Laboratory of Nutrition, Faculty of Pharmaceutical Sciences , São Paulo State University (UNESP) , Araraquara 01049-010 , Brazil
| | - John A Manthey
- U.S. Horticultural Research Laboratory, ARS , United States Department of Agriculture , 2001 South Rock Road , Fort Pierce , FL 34945 , United States
| | - Paulo I da Costa
- Clinical Analysis Department, School of Pharmaceutical Sciences , São Paulo State University (UNESP) , Araraquara 01049-010 , Brazil
| | - Marilia C M Rodrigues
- Department of Food and Nutrition, Laboratory of Nutrition, Faculty of Pharmaceutical Sciences , São Paulo State University (UNESP) , Araraquara 01049-010 , Brazil
| | - Thais B Cesar
- Department of Food and Nutrition, Laboratory of Nutrition, Faculty of Pharmaceutical Sciences , São Paulo State University (UNESP) , Araraquara 01049-010 , Brazil
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25
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Xu Y, Ren L, Dang D, Zhi Y, Wang X, Meng L. A Strategy of “Self-Isolated Enhanced Emission” to Achieve Highly Emissive Dual-State Emission for Organic Luminescent Materials. Chemistry 2018; 24:10383-10389. [DOI: 10.1002/chem.201802201] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 05/21/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Yanzi Xu
- School of Science, State Key Laboratory for Mechanical, Behavior of Materials, MOE Key Laboratory for Nonequilibrium, Synthesis and Modulation of Condensed Matter; Xi'an Jiaotong University; Xi'an 710049 P.R. China
| | - Lin Ren
- School of Science, State Key Laboratory for Mechanical, Behavior of Materials, MOE Key Laboratory for Nonequilibrium, Synthesis and Modulation of Condensed Matter; Xi'an Jiaotong University; Xi'an 710049 P.R. China
| | - Dongfeng Dang
- School of Science, State Key Laboratory for Mechanical, Behavior of Materials, MOE Key Laboratory for Nonequilibrium, Synthesis and Modulation of Condensed Matter; Xi'an Jiaotong University; Xi'an 710049 P.R. China
| | - Ying Zhi
- School of Science, State Key Laboratory for Mechanical, Behavior of Materials, MOE Key Laboratory for Nonequilibrium, Synthesis and Modulation of Condensed Matter; Xi'an Jiaotong University; Xi'an 710049 P.R. China
| | - Xiaochi Wang
- School of Science, State Key Laboratory for Mechanical, Behavior of Materials, MOE Key Laboratory for Nonequilibrium, Synthesis and Modulation of Condensed Matter; Xi'an Jiaotong University; Xi'an 710049 P.R. China
| | - Lingjie Meng
- School of Science, State Key Laboratory for Mechanical, Behavior of Materials, MOE Key Laboratory for Nonequilibrium, Synthesis and Modulation of Condensed Matter; Xi'an Jiaotong University; Xi'an 710049 P.R. China
- Instrumental analysis center; Xi'an Jiaotong University; Xi'an 710049 P.R. China
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26
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Eisold U, Sellrie F, Memczak H, Andersson A, Schenk JA, Kumke MU. Dye Tool Box for a Fluorescence Enhancement Immunoassay. Bioconjug Chem 2018; 29:203-214. [PMID: 29268011 DOI: 10.1021/acs.bioconjchem.7b00731] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Immunochemical analytical methods are very successful in clinical diagnostics and are nowadays also emerging in the control of food as well as monitoring of environmental issues. Among the different immunoassays, luminescence based formats are characterized by their outstanding sensitivity making this format especially attractive for future applications. The need for multiparameter detection capabilities calls for a tool box of dye labels in order to transduce the biochemical reaction into an optically detectable signal. Here, in a multiparameter approach each analyte may be detected by a different dye with a unique emission color (covering the blue to red spectral range) or a unique luminescence decay kinetics. In the case of a competitive immunoassay format for each of the different dye labels an individual antibody would be needed. In the present paper a slightly modified approach is presented using a 7-aminocoumarin unit as the basic antigen against which highly specific antibodies were generated. Leaving the epitope region in the dyes unchanged but introducing a side group in positon 3 of the coumarin system allowed us to tune the optical properties of the coumarin dyes without the necessity of new antibody generation. Upon modification of the parent coumarin unit the full spectral range from blue to deep red was accessed. In the manuscript the photophysical characterization of the coumarin derivatives and their corresponding immunocomplexes with two highly specific antibodies is presented. The coumarin dyes and their immunocomplexes were characterized by steady-state and time-resolved absorption as well as emission spectroscopy. Moreover, fluorescence depolarization measurements were carried out to complement the data stressing the different binding modes of the two antibodies. The binding modes were evaluated using the photophysics of 7-aminocoumarins and how it was affected in the respective immunocomplexes, namely, the formation of the intramolecular charge transfer (ICT) as well as the twisted intramolecular charge transfer (TICT). In contrast to other antibody-dye pairs reported a distinct fluorescence enhancement upon formation of the antibody-dye complex up to a factor of 50 was found. Because of the easy emission color tuning by tailoring the coumarin substitution for the antigen binding in nonrelevant position 3 of the parent molecule, a dye tool box is on hand which can be used in the construction of competitive multiparameter fluorescence enhancement immunoassays (FenIA).
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Affiliation(s)
- Ursula Eisold
- Institute of Chemistry, University of Potsdam , Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
| | - Frank Sellrie
- UP Transfer GmbH , Am Neuen Palais 10, 14469 Potsdam, Germany.,Hybrotec GmbH , Am Mühlenberg 11, 14476 Potsdam, Germany
| | | | | | - Jörg A Schenk
- UP Transfer GmbH , Am Neuen Palais 10, 14469 Potsdam, Germany.,Hybrotec GmbH , Am Mühlenberg 11, 14476 Potsdam, Germany
| | - Michael U Kumke
- Institute of Chemistry, University of Potsdam , Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
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27
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Kielesiński Ł, Gryko DT, Sobolewski AL, Morawski OW. Effect of conformational flexibility on photophysics of bis-coumarins. Phys Chem Chem Phys 2018; 20:14491-14503. [DOI: 10.1039/c8cp01084f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The fluorescence of bis-coumarins linked via CONH and COO functionalities is strongly dependant on solvent polarity.
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Affiliation(s)
- Łukasz Kielesiński
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
- Institute of Physics
| | - Daniel T. Gryko
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | | | - Olaf W. Morawski
- Institute of Physics
- Polish Academy of Sciences
- 02-668 Warsaw
- Poland
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28
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Yuan JW, Fu JH, Liu SN, Xiao YM, Mao P, Qu LB. Metal-free oxidative coupling of quinoxalin-2(1H)-ones with arylaldehydes leading to 3-acylated quinoxalin-2(1H)-ones. Org Biomol Chem 2018; 16:3203-3212. [DOI: 10.1039/c8ob00206a] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An efficient protocol for the synthesis of 3-aroylquinoxalin-2(1H)-ones has been developed via a metal-free oxidative cross-coupling reaction of quinoxalin-2(1H)-ones with aryl aldehydes under mild conditions with good yields.
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Affiliation(s)
- Jin-Wei Yuan
- School of Chemistry and Chemical Engineering
- Henan University of Technology
- Zhengzhou 450001
- PR China
| | - Jun-Hao Fu
- School of Chemistry and Chemical Engineering
- Henan University of Technology
- Zhengzhou 450001
- PR China
| | - Shuai-Nan Liu
- School of Chemistry and Chemical Engineering
- Henan University of Technology
- Zhengzhou 450001
- PR China
| | - Yong-Mei Xiao
- School of Chemistry and Chemical Engineering
- Henan University of Technology
- Zhengzhou 450001
- PR China
| | - Pu Mao
- School of Chemistry and Chemical Engineering
- Henan University of Technology
- Zhengzhou 450001
- PR China
| | - Ling-Bo Qu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- PR China
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29
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Burganov TI, Katsyuba SA, Sharipova SM, Kalinin AA, Monari A, Assfeld X. Novel quinoxalinone-based push–pull chromophores with highly sensitive emission and absorption properties towards small structural modifications. Phys Chem Chem Phys 2018; 20:21515-21527. [DOI: 10.1039/c8cp03780a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The photophysical properties of a series of novel push–pull quinoxalinone-based chromophores that strongly absorb and emit light in the broad visible spectrum were comprehensively studied both experimentally and through quantum chemical methods.
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Affiliation(s)
- T. I. Burganov
- Arbuzov Institute of Organic and Physical Chemistry
- FRC Kazan Scientific Center of RAS
- Kazan
- Russia
| | - S. A. Katsyuba
- Arbuzov Institute of Organic and Physical Chemistry
- FRC Kazan Scientific Center of RAS
- Kazan
- Russia
| | - S. M. Sharipova
- Arbuzov Institute of Organic and Physical Chemistry
- FRC Kazan Scientific Center of RAS
- Kazan
- Russia
| | - A. A. Kalinin
- Arbuzov Institute of Organic and Physical Chemistry
- FRC Kazan Scientific Center of RAS
- Kazan
- Russia
| | - A. Monari
- University of Lorraine
- LPCT UMR 7019
- F-54000 Nancy
- France
| | - X. Assfeld
- University of Lorraine
- LPCT UMR 7019
- F-54000 Nancy
- France
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30
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Tamura T, Nakano S, Nakata E, Morii T. Construction of a library of structurally diverse ribonucleopeptides with catalytic groups. Bioorg Med Chem 2017; 25:1881-1888. [PMID: 28223024 DOI: 10.1016/j.bmc.2017.02.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 01/31/2017] [Accepted: 02/03/2017] [Indexed: 01/20/2023]
Abstract
Functional screening of structurally diverse libraries consisting of proteins or nucleic acids is an effective method to obtain receptors or aptamers with unique molecular recognition characteristics. However, further modification of these selected receptors to exert a newly desired function is still a challenging task. We have constructed a library of structurally diverse ribonucleopeptides (RNPs) that are modified with a catalytic group, in which the catalytic group aligns with various orientations against the ATP binding pocket of RNA subunit. As a proof-of-principle, the screening of the constructed RNP library for the catalytic reaction of ester hydrolysis was successfully carried out. The size of both the substrate-binding RNA library and the catalytic group modified peptide library are independently expandable, and thus, the size of RNPs library could be enlarged by a combination of these two subunits. We anticipate that the library of functionalized and structurally diverse RNPs would be expanded for various other catalytic reactions.
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Affiliation(s)
- Tomoki Tamura
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Shun Nakano
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Eiji Nakata
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Takashi Morii
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan.
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31
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Renault K, Renard PY, Sabot C. Photophysical properties of quinoxalin-2(1H)-ones: application in the preparation of an azide-based fluorogenic probe for the detection of hydrogen sulfide. NEW J CHEM 2017. [DOI: 10.1039/c7nj01893b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluorescent quinoxalinones with good quantum yields were obtained and used in the preparation of a probe for the detection of H2S.
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Affiliation(s)
- Kévin Renault
- Normandie Univ
- CNRS
- UNIROUEN
- INSA Rouen
- COBRA (UMR 6014)
| | | | - Cyrille Sabot
- Normandie Univ
- CNRS
- UNIROUEN
- INSA Rouen
- COBRA (UMR 6014)
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32
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Pandit RP, Shim JJ, Kim SH, Lee YR. Copper-catalyzed direct coupling of benzoxazin-2-ones with indoles for the synthesis of diverse 3-indolylbenzoxazin-2-ones: access to natural cephalandole A. RSC Adv 2017. [DOI: 10.1039/c7ra10634c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Diverse and functionalized 3-indolyl benzo[b][1,4]oxazin-2-ones were synthesized via copper-catalyzed direct coupling of benzo[b][1,4]oxazin-2-one and indoles in air.
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Affiliation(s)
| | - Jae-Jin Shim
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan
- Republic of Korea
| | - Sung Hong Kim
- Analysis Research Division
- Daegu Center
- Korea Basic Science Institute
- Daegu 41566
- Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan
- Republic of Korea
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33
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Mtiraoui H, Renault K, Sanselme M, Msaddek M, Renard PY, Sabot C. Metal-free oxidative ring contraction of benzodiazepinones: an entry to quinoxalinones. Org Biomol Chem 2017; 15:3060-3068. [DOI: 10.1039/c7ob00205j] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Herein is reported a practical method for the construction of 3-benzoylquinoxalinones from benzodiazepinones in the presence of DMSO which serves both as a solvent and an oxidant.
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Affiliation(s)
- Hasan Mtiraoui
- Université Monastir
- Laboratory of Heterocyclic Chemistry Natural Products and Reactivity/CHPNR
- Department of Chemistry
- Faculty of Science of Monastir
- 5000 Monastir
| | - Kevin Renault
- Normandie Univ
- CNRS
- UNIROUEN
- INSA Rouen
- COBRA (UMR 6014)
| | - Morgane Sanselme
- Normandie Univ
- France
- UNIROUEN
- Laboratoire SMS EA3233
- F-76821 Mont Saint Aignan
| | - Moncef Msaddek
- Université Monastir
- Laboratory of Heterocyclic Chemistry Natural Products and Reactivity/CHPNR
- Department of Chemistry
- Faculty of Science of Monastir
- 5000 Monastir
| | | | - Cyrille Sabot
- Normandie Univ
- CNRS
- UNIROUEN
- INSA Rouen
- COBRA (UMR 6014)
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34
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An R, Wei P, Zhang D, Su N. A highly selective 7-hydroxy-3-methyl-benzoxazinone based fluorescent probe for instant detection of thiophenols in environmental samples. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.05.107] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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35
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Saeed A, Channar PA, Shabir G, Larik FA. Green Synthesis, Characterization and Electrochemical Behavior of New Thiazole Based Coumarinyl Scaffolds. J Fluoresc 2016; 26:1067-76. [DOI: 10.1007/s10895-016-1795-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 03/27/2016] [Indexed: 11/24/2022]
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36
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Minami Y, Hiyama T. Synthetic Transformations through Alkynoxy-Palladium Interactions and C-H Activation. Acc Chem Res 2016; 49:67-77. [PMID: 26651014 DOI: 10.1021/acs.accounts.5b00414] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Organic synthesis based on straightforward transformations is essential for environmentally benign manufacturing for the invention of novel pharmaceuticals, agrochemicals, and organoelectronic materials in order to ultimately realize a sustainable society. Metal-catalyzed C-H bond-cleaving functionalization has become a promising method for achieving the above goal. For site-selective C-H bond cleavage, so-called directing groups, i.e., ligands attached to substrates, are employed. Commonly utilized directing groups are carbonyls, imines, carboxyls, amides, and pyridyls, which σ-donate electron pairs to metals. On the other hand, unsaturated substrates such as alkenes and alkynes, which participate largely as reactants in organic synthesis, are prepared readily by a wide variety of synthetic transformations and are also employed as reactants in organometallic chemistry. Moreover, such unsaturated groups form complexes with some metals by ligation of their p orbitals via donation and back-donation. However, the use of unsaturated bonds as directing groups has not been studied extensively. We have been involved in the development of methods for the cleavage of C-H bonds by means of transition-metal catalysts to achieve new carbon-carbon bond-forming reactions and incidentally came to focus on the alkynoxy group (-OC≡C-), which shows a ketene-like resonance structure. We expected the alkynoxy group to interact electrophilically with a low-valent transition-metal complex in order to cleave adjacent C-H bonds. In this Account, we summarize our recent achievements on C-H activation based on interactions of palladium with the alkynoxy group in alkynyl aryl ethers. The alkynoxy group plays two roles in the transformation: as a directing group for adjacent C-H bond activation and as an acceptor for the carbon and hydrogen fragments. A typical example is palladium-catalyzed ortho-C-H bond activation in alkynoxyarenes followed by sequential insertion/annulation with internal alkynes and the alkynoxy group to produce 2-methylidene-2H-1-benzopyrans. Mechanistic studies have shown that the presence of both oxygen and alkynyl moieties is essential for selective ortho-C-H bond activation and subsequent annulation. In addition to internal alkynes, norbornene, allenes, isocyanates, and ketenes produce the corresponding oxacycles. It is worthy of note that benzoxadinones formed by the reaction with isocyanates exhibit solid-state luminescence. In addition, 2-methylphenyl alkynyl ethers and 2-alkynoxybiaryls undergo intramolecular annulation at the benzylic γ-position and aryl δ-position via C-H bond activation to give benzofurans and dibenzopyrans, respectively. The disclosed methods allow us to construct useful π-conjugated systems in a straightforward manner.
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Affiliation(s)
- Yasunori Minami
- Research and Development
Initiative, Chuo University, Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Tamejiro Hiyama
- Research and Development
Initiative, Chuo University, Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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37
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Guggilapu SD, Prajapti SK, Nagarsenkar A, Lalita G, Naidu Vegi GM, Babu BN. MoO2Cl2 catalyzed efficient synthesis of functionalized 3,4-dihydropyrimidin-2(1H)-ones/thiones and polyhydroquinolines: recyclability, fluorescence and biological studies. NEW J CHEM 2016. [DOI: 10.1039/c5nj02444g] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
MoO2Cl2 catalyzed Biginelli, Hantzsch reactions exploring spectroscopic and biological properties of novel compounds.
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Affiliation(s)
- Sravanthi Devi Guggilapu
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research
- Hyderabad
- India
| | - Santosh Kumar Prajapti
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research
- Hyderabad
- India
| | - Atulya Nagarsenkar
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research
- Hyderabad
- India
| | - Guntuku Lalita
- Department of Pharmacology and Toxicology
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad 500037
- India
| | - Ganga Modi Naidu Vegi
- Department of Pharmacology and Toxicology
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad 500037
- India
| | - Bathini Nagendra Babu
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research
- Hyderabad
- India
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38
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Pereira TM, Vitório F, Amaral RC, Zanoni KPS, Murakami Iha NY, Kümmerle AE. Microwave-assisted synthesis and photophysical studies of novel fluorescent N-acylhydrazone and semicarbazone-7-OH-coumarin dyes. NEW J CHEM 2016. [DOI: 10.1039/c6nj01532h] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Emissive 7-OH-coumarins were synthesized by a microwave-assisted protocol and spectral changes were induced after conformational changes in low polarity media.
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Affiliation(s)
- Thiago Moreira Pereira
- Laboratório de Diversidade Molecular e Química Medicinal (LaDMol-QM, Molecular Diversity and Medicinal Chemistry Laboratory)
- Departament of Chemistry
- Universidade Federal Rural do Rio de Janeiro
- Rio de Janeiro
- Brazil
| | - Felipe Vitório
- Laboratório de Diversidade Molecular e Química Medicinal (LaDMol-QM, Molecular Diversity and Medicinal Chemistry Laboratory)
- Departament of Chemistry
- Universidade Federal Rural do Rio de Janeiro
- Rio de Janeiro
- Brazil
| | - Ronaldo Costa Amaral
- Laboratory of Photochemistry and Energy Conversion
- Departamento de Química Fundamental
- Instituto de Química
- Universidade de São Paulo
- São Paulo – SP 05508-000
| | - Kassio Papi Silva Zanoni
- Laboratory of Photochemistry and Energy Conversion
- Departamento de Química Fundamental
- Instituto de Química
- Universidade de São Paulo
- São Paulo – SP 05508-000
| | - Neyde Yukie Murakami Iha
- Laboratory of Photochemistry and Energy Conversion
- Departamento de Química Fundamental
- Instituto de Química
- Universidade de São Paulo
- São Paulo – SP 05508-000
| | - Arthur Eugen Kümmerle
- Laboratório de Diversidade Molecular e Química Medicinal (LaDMol-QM, Molecular Diversity and Medicinal Chemistry Laboratory)
- Departament of Chemistry
- Universidade Federal Rural do Rio de Janeiro
- Rio de Janeiro
- Brazil
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39
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Palladium-catalyzed annulation of alkynyl aryl ethers with isocyanates through o-C–H cleavage. Synthesis of solid-state emissive 2-methylidene-2H-1,4-benzoxazin-3(4H)-ones. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.02.062] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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40
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Vitório F, Pereira TM, Castro RN, Guedes GP, Graebin CS, Kümmerle AE. Synthesis and mechanism of novel fluorescent coumarin–dihydropyrimidinone dyads obtained by the Biginelli multicomponent reaction. NEW J CHEM 2015. [DOI: 10.1039/c4nj02155j] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coumarin-β-ketoesters were used to synthesize new blue-fluorescent compounds exhibiting ICT. The Knoevenagel intermediate suggests that our Biginelli reaction passing by this mechanistic way is unlikely.
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Affiliation(s)
- Felipe Vitório
- Laboratório de Diversidade Molecular e Química Medicinal (LaDMol-QM
- Molecular Diversity and Medicinal Chemistry Laboratory)
- Departament of Chemistry
- Universidade Federal Rural do Rio de Janeiro
- Rio de Janeiro
| | - Thiago Moreira Pereira
- Laboratório de Diversidade Molecular e Química Medicinal (LaDMol-QM
- Molecular Diversity and Medicinal Chemistry Laboratory)
- Departament of Chemistry
- Universidade Federal Rural do Rio de Janeiro
- Rio de Janeiro
| | - Rosane Nora Castro
- Programa de Pós-Gradução em Química (PPGQ)
- Universidade Federal Rural do Rio de Janeiro
- Rio de Janeiro
- Brazil
| | - Guilherme Pereira Guedes
- Programa de Pós-Gradução em Química (PPGQ)
- Universidade Federal Rural do Rio de Janeiro
- Rio de Janeiro
- Brazil
| | - Cedric Stephan Graebin
- Laboratório de Diversidade Molecular e Química Medicinal (LaDMol-QM
- Molecular Diversity and Medicinal Chemistry Laboratory)
- Departament of Chemistry
- Universidade Federal Rural do Rio de Janeiro
- Rio de Janeiro
| | - Arthur Eugen Kümmerle
- Laboratório de Diversidade Molecular e Química Medicinal (LaDMol-QM
- Molecular Diversity and Medicinal Chemistry Laboratory)
- Departament of Chemistry
- Universidade Federal Rural do Rio de Janeiro
- Rio de Janeiro
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41
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Synthesis and Photochromic Properties of Spirobiindane Based Bis-coumarins. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES INDIA SECTION A-PHYSICAL SCIENCES 2014. [DOI: 10.1007/s40010-014-0179-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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42
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Minami Y, Kanda M, Hiyama T. Palladium-catalyzed Cycloaddition of Aryl Silylethynyl Ethers with Isocyanates via o-C–H Cleavage. CHEM LETT 2014. [DOI: 10.1246/cl.140452] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Yasunori Minami
- Research and Development Initiative, Chuo University
- ACT-C, JST
| | - Mayuko Kanda
- Department of Applied Chemistry, Chuo University
| | - Tamejiro Hiyama
- Research and Development Initiative, Chuo University
- ACT-C, JST
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Tasior M, Poronik YM, Vakuliuk O, Sadowski B, Karczewski M, Gryko DT. V-Shaped Bis-Coumarins: Synthesis and Optical Properties. J Org Chem 2014; 79:8723-32. [DOI: 10.1021/jo501565r] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Mariusz Tasior
- Institute
of Organic Chemistry of the Polish Academy of Sciences, Kasprzaka
44/52, 01-224 Warsaw, Poland
| | - Yevgen M. Poronik
- Institute
of Organic Chemistry of the Polish Academy of Sciences, Kasprzaka
44/52, 01-224 Warsaw, Poland
| | - Olena Vakuliuk
- Institute
of Organic Chemistry of the Polish Academy of Sciences, Kasprzaka
44/52, 01-224 Warsaw, Poland
- Faculty
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Bartłomiej Sadowski
- Institute
of Organic Chemistry of the Polish Academy of Sciences, Kasprzaka
44/52, 01-224 Warsaw, Poland
| | - Maksymilian Karczewski
- Institute
of Organic Chemistry of the Polish Academy of Sciences, Kasprzaka
44/52, 01-224 Warsaw, Poland
| | - Daniel T. Gryko
- Institute
of Organic Chemistry of the Polish Academy of Sciences, Kasprzaka
44/52, 01-224 Warsaw, Poland
- Faculty
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
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44
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Surya Prakash Rao H, Babu M, Desai A. Synthesis, characterization and spectroscopic properties of water soluble coumarins substituted with oligomeric alkoxy functions. RSC Adv 2014. [DOI: 10.1039/c3ra46704j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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45
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Yan S, Ye L, Liu M, Chen J, Ding J, Gao W, Huang X, Wu H. Unexpected TFA-catalyzed tandem reaction of benzo[d]oxazoles with 2-oxo-2-arylacetic acids: synthesis of 3-aryl-2H-benzo[b][1,4]oxazin-2-ones and cephalandole A. RSC Adv 2014. [DOI: 10.1039/c4ra01605j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
TFA-catalyzed reaction of benzo[d]oxazoles with 2-oxo-2-arylacetic acids: synthesis of 3-aryl-2H-benzo[b][1,4]oxazin-2-ones and the natural product cephalandole A.
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Affiliation(s)
- Shaoxi Yan
- College of Chemistry & Materials Engineering
- Wenzhou University
- Wenzhou 325035, P. R. China
| | - Leping Ye
- The Second Affiliated Hospital
- Wenzhou Medical University
- Wenzhou 325000, P. R. China
| | - Miaochang Liu
- College of Chemistry & Materials Engineering
- Wenzhou University
- Wenzhou 325035, P. R. China
| | - Jiuxi Chen
- College of Chemistry & Materials Engineering
- Wenzhou University
- Wenzhou 325035, P. R. China
| | - Jinchang Ding
- College of Chemistry & Materials Engineering
- Wenzhou University
- Wenzhou 325035, P. R. China
| | - Wenxia Gao
- College of Chemistry & Materials Engineering
- Wenzhou University
- Wenzhou 325035, P. R. China
| | - Xiaobo Huang
- College of Chemistry & Materials Engineering
- Wenzhou University
- Wenzhou 325035, P. R. China
| | - Huayue Wu
- College of Chemistry & Materials Engineering
- Wenzhou University
- Wenzhou 325035, P. R. China
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46
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Mertens MD, Gütschow M. Synthesis and Evaluation of Two Coumarin-Type Derivatization Reagents for Fluorescence Detection of Chiral Amines and Chiral Carboxylic Acids. Chirality 2013; 25:957-64. [DOI: 10.1002/chir.22240] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 07/26/2013] [Accepted: 08/06/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Matthias D. Mertens
- Pharmaceutical Institute, Pharmaceutical Chemistry I; University of Bonn; Bonn Germany
| | - Michael Gütschow
- Pharmaceutical Institute, Pharmaceutical Chemistry I; University of Bonn; Bonn Germany
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47
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Rana DK, Rakshit S, Dhar S, Bhattacharya SC. Spectroscopic probing of the microenvironment of 7-oxy(5-selenocyanato-pentyl)-2H-1-benzopyran-2-one in ionic and nonionic micelles. J Photochem Photobiol A Chem 2013. [DOI: 10.1016/j.jphotochem.2013.07.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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48
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Krzeszewski M, Vakuliuk O, Gryko DT. Color-Tunable Fluorescent Dyes Based on Benzo[c]coumarin. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300374] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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49
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Hachama K, Khodja M, Moulay S, Boutoumi H, Hennig L, Sicker D. Novel 3-(2-Oxo-2 H-benzo[ b][1,4]oxazin-3-yl)propanoates from Dimethyl-2-oxoglutarate and Test of Their Biological Activity. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1520] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kamel Hachama
- Laboratoire de Recherche Plantes Médicinales et Aromatiques, Département de Chimie Industrielle; Université Saâd Dahlab de Blida; 09000 Blida, B. P. 270; Algeria
| | - Mohamed Khodja
- Laboratoire de Recherche Plantes Médicinales et Aromatiques, Département de Chimie Industrielle; Université Saâd Dahlab de Blida; 09000 Blida, B. P. 270; Algeria
| | - Saad Moulay
- Laboratoire Chimie-Physique Moléculaire et Macromoléculaire, Département de Chimie Industrielle; Université Saâd Dahlab de Blida; 09000 Blida, B. P. 270; Algeria
| | - Hocine Boutoumi
- Laboratoire de Recherche Plantes Médicinales et Aromatiques, Département de Chimie Industrielle; Université Saâd Dahlab de Blida; 09000 Blida, B. P. 270; Algeria
| | - Lothar Hennig
- Institut für Organische Chemie der Universität Leipzig; Johannisallee 29; D-04103; Leipzig; Germany
| | - Dieter Sicker
- Institut für Organische Chemie der Universität Leipzig; Johannisallee 29; D-04103; Leipzig; Germany
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50
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Szíjjártó C, Pershagen E, Ilchenko NO, Borbas KE. A versatile long-wavelength-absorbing scaffold for Eu-based responsive probes. Chemistry 2013; 19:3099-109. [PMID: 23307197 DOI: 10.1002/chem.201203957] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Indexed: 12/27/2022]
Abstract
Coumarin-sensitized, long-wavelength-absorbing luminescent Eu(III)-complexes have been synthesized and characterized. The lanthanide binding site consists of a cyclen-based chelating framework that is attached through a short linker to a 7-hydroxycoumarin, a 7-B(OH)(2)-coumarin, a 7-O-(4-pinacolatoboronbenzyl)-coumarin or a 7-O-(4-methoxybenzyl)-coumarin. The syntheses are straightforward, use readily available building blocks, and proceed through a small number of high-yielding steps. The sensitivity of coumarin photophysics to the 7-substituent enables modulation of the antenna-absorption properties, and thus the lanthanide excitation spectrum. Reactions of the boronate-based functionalities (cages) with H(2)O(2) yielded the corresponding 7-hydroxycoumarin species. The same species was produced with peroxynitrite in a ×10(6)-10(7)-fold faster reaction. Both reactions resulted in the emergence of a strong ≈407 nm excitation band, with concomitant decrease of the 366 nm band of the caged probe. In aqueous solution the methoxybenzyl caged Eu-complex was quenched by ONOO(-). We have shown that preliminary screening of simple coumarin-based antennae through UV/Vis absorption spectroscopy is possible as the changes in absorption profile translate with good fidelity to changes in Eu(III)-excitation profile in the fully elaborated complex. Taken together, our results show that the 7-hydroxycoumarin antenna is a viable scaffold for the construction of turn-on and ratiometric luminescent probes.
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Affiliation(s)
- Csongor Szíjjártó
- Department of Chemistry, BMC, Uppsala University, Box 576, 75123 Uppsala, Sweden
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