1
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Segato J, Aneggi E, Baratta W, Campagnolo F, Belpassi L, Belanzoni P, Zuccaccia D. Experimental and Theoretical Investigation of Ion Pairing in Gold(III) Catalysts. Organometallics 2023; 42:2973-2982. [PMID: 37886625 PMCID: PMC10599130 DOI: 10.1021/acs.organomet.3c00293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Indexed: 10/28/2023]
Abstract
The ion pairing structure of the possible species present in solution during the gold(III)-catalyzed hydration of alkynes: [(ppy)Au(NHC)Y]X2 and [(ppy)Au(NHC)X]X [ppy = 2-phenylpyridine, NHC = NHCiPr = 1,3-bis(2,6-di-isopropylphenyl)-imidazol-2-ylidene; NHC = NHCmes = 1,3-bis(2,4,6-trimethylphenyl)-imidazol-2-ylidene X = Cl-, BF4-, OTf-; Y = H2O and 3-hexyne] are determined. The nuclear overhauser effect nuclear magnetic resonance (NMR) experimental measurements integrated with a theoretical description of the system (full optimization of different ion pairs and calculation of the Coulomb potential surface) indicate that the preferential position of the counterion is tunable through the choice of the ancillary ligands (NHCiPr, NHCmes, ppy, and Y) in [(ppy)Au(NHC)(3-hexyne)]X2 activated complexes that undergo nucleophilic attack. The counterion can approach near NHC, pyridine ring of ppy, and gold atom. From these positions, the anion can act as a template, holding water in the right position for the outer-sphere attack, as observed in gold(I) catalysts.
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Affiliation(s)
- Jacopo Segato
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Eleonora Aneggi
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Walter Baratta
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Filippo Campagnolo
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Leonardo Belpassi
- Istituto
di Scienze e Tecnologie Chimiche (SCITEC), Consiglio Nazionale delle
Ricerche c/o Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Paola Belanzoni
- Istituto
di Scienze e Tecnologie Chimiche (SCITEC), Consiglio Nazionale delle
Ricerche c/o Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
- Dipartimento
di Chimica, Biologia e Biotecnologie, Università
degli Studi di Perugia, 06123 Perugia, Italy
| | - Daniele Zuccaccia
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
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2
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O WY, Cui JF, Yu Q, Kung KKY, Chung SF, Leung YC, Wong MK. Isoindolium-Based Allenes: Reactivity Studies and Applications in Fluorescence Temperature Sensing and Cysteine Bioconjugation. Angew Chem Int Ed Engl 2023; 62:e202218038. [PMID: 36670048 DOI: 10.1002/anie.202218038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/19/2023] [Accepted: 01/20/2023] [Indexed: 01/22/2023]
Abstract
The reaction of a series of electron-deficient isoindolium-based allenes with sulfhydryl compounds has been studied, leading to the formation of isoindolium-based vinyl sulfides. The vinyl sulfides generated could be readily converted into the corresponding indanones and amines upon heating at 30-70 °C with good yields up to 61 %. The thermal cleavage reaction of vinyl sulfides was further studied for developing temperature-sensitive systems. Notably, a novel FRET-based fluorescent temperature sensor was designed and synthesized for temperature sensing at 50 °C, giving a 6.5-fold blue fluorescence enhancement. Moreover, chemoselective bioconjugation of cysteine-containing peptides with the isoindolium-based allenes for the construction of multifunctional peptide bioconjugates was investigated. Thermal cleavage of isoindoliums on the modified peptides at 35-70 °C gave indanone bioconjugates with up to >99 % conversion. These results indicated the biocompatibility of this novel temperature-sensitive reaction.
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Affiliation(s)
- Wa-Yi O
- State Key Laboratory of Chemical Biology and Drug Discovery, Research Institute for Future Food, Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China.,The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, 518057, China
| | - Jian-Fang Cui
- Department of Chemistry, Southern University of Science and Technology, 1088 Xueyuan Blvd., Shenzhen, 518055, China
| | - Qiong Yu
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, 518057, China
| | - Karen Ka-Yan Kung
- State Key Laboratory of Chemical Biology and Drug Discovery, Research Institute for Future Food, Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China.,The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, 518057, China
| | - Sai-Fung Chung
- Henry Cheng Research Laboratory for Drug Development, Lo Ka Chung Centre for Natural Anti-Cancer Drug Development, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Yun-Chung Leung
- Henry Cheng Research Laboratory for Drug Development, Lo Ka Chung Centre for Natural Anti-Cancer Drug Development, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Man-Kin Wong
- State Key Laboratory of Chemical Biology and Drug Discovery, Research Institute for Future Food, Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China.,The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, 518057, China
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3
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Tantipanjaporn A, Ka-Yan Kung K, Sit HY, Wong MK. Quinolizinium-based fluorescent probes for formaldehyde detection in aqueous solution, serum, and test strip via 2-aza-Cope rearrangement. RSC Adv 2022; 12:11543-11547. [PMID: 35425039 PMCID: PMC9006350 DOI: 10.1039/d2ra01397e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 04/06/2022] [Indexed: 01/31/2023] Open
Abstract
Formaldehyde is an abundant contaminant in food and environments causing various diseases. Thus, the development of fast, simple, and selective formaldehyde detection is of great interest. Herein, novel quinolizinium-based fluorescent probes were designed based on a 2-aza-Cope rearrangement reaction and showed high selectivity to formaldehyde by fluorescence emission shift. We successfully reduced the detection time by increasing the bulkiness of the homoallylic moiety. The probes were applied to detect formaldehyde in aqueous solution, serum, and paper format.
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Affiliation(s)
- Ajcharapan Tantipanjaporn
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hum Hong Kong China
| | - Karen Ka-Yan Kung
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hum Hong Kong China
| | - Hoi-Yi Sit
- The Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518057 China
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hum Hong Kong China
| | - Man-Kin Wong
- The Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518057 China
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hum Hong Kong China
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4
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Monitoring of the Pre-Equilibrium Step in the Alkyne Hydration Reaction Catalyzed by Au(III) Complexes: A Computational Study Based on Experimental Evidences. Molecules 2021; 26:molecules26092445. [PMID: 33922177 PMCID: PMC8122707 DOI: 10.3390/molecules26092445] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/16/2021] [Accepted: 04/19/2021] [Indexed: 11/18/2022] Open
Abstract
The coordination ability of the [(ppy)Au(IPr)]2+ fragment [ppy = 2-phenylpyridine, IPr = 1,3-bis(2,6-di-isopropylphenyl)-imidazol-2-ylidene] towards different anionic and neutral X ligands (X = Cl−, BF4−, OTf−, H2O, 2-butyne, 3-hexyne) commonly involved in the crucial pre-equilibrium step of the alkyne hydration reaction is computationally investigated to shed light on unexpected experimental observations on its catalytic activity. Experiment reveals that BF4− and OTf− have very similar coordination ability towards [(ppy)Au(IPr)]2+ and slightly less than water, whereas the alkyne complex could not be observed in solution at least at the NMR sensitivity. Due to the steric hindrance/dispersion interaction balance between X and IPr, the [(ppy)Au(IPr)]2+ fragment is computationally found to be much less selective than a model [(ppy)Au(NHC)]2+ (NHC = 1,3-dimethylimidazol-2-ylidene) fragment towards the different ligands, in particular OTf− and BF4−, in agreement with experiment. Effect of the ancillary ligand substitution demonstrates that the coordination ability of Au(III) is quantitatively strongly affected by the nature of the ligands (even more than the net charge of the complex) and that all the investigated gold fragments coordinate to alkynes more strongly than H2O. Remarkably, a stabilization of the water-coordinating species with respect to the alkyne-coordinating one can only be achieved within a microsolvation model, which reconciles theory with experiment. All the results reported here suggest that both the Au(III) fragment coordination ability and its proper computational modelling in the experimental conditions are fundamental issues for the design of efficient catalysts.
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5
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Selective modification of alkyne-linked peptides and proteins by cyclometalated gold(III) (C^N) complex-mediated alkynylation. Bioorg Med Chem 2020; 28:115375. [DOI: 10.1016/j.bmc.2020.115375] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 02/06/2020] [Accepted: 02/07/2020] [Indexed: 12/16/2022]
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6
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Reiersølmoen AC, Csókás D, Øien-Ødegaard S, Vanderkooy A, Gupta AK, Carlsson ACC, Orthaber A, Fiksdahl A, Pápai I, Erdélyi M. Catalytic Activity of trans-Bis(pyridine)gold Complexes. J Am Chem Soc 2020; 142:6439-6446. [PMID: 32168451 PMCID: PMC7343288 DOI: 10.1021/jacs.0c01941] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
![]()
Gold
catalysis has become one of the fastest growing fields in
chemistry, providing new organic transformations and offering excellent
chemoselectivities under mild reaction conditions. Methodological
developments have been driven by wide applicability in the synthesis
of complex structures, whereas the mechanistic understanding of Au(III)-mediated
processes remains scanty and have become the Achilles’ heel
of methodology development. Herein, the systematic investigation of
the reactivity of bis(pyridine)-ligated Au(III) complexes is presented,
based on NMR spectroscopic, X-ray crystallographic, and DFT data.
The electron density of pyridines modulates the catalytic activity
of Au(III) complexes in propargyl ester cyclopropanation of styrene.
To avoid strain induced by a ligand with a nonoptimal nitrogen–nitrogen
distance, bidentate bis(pyridine)–Au(III) complexes convert
into dimers. For the first time, bis(pyridine)Au(I) complexes are
shown to be catalytically active, with their reactivity being modulated
by strain.
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Affiliation(s)
- Ann Christin Reiersølmoen
- Department of Chemistry, Norwegian University of Science and Technology, Høgskoleringen 5, 7491 Trondheim, Norway
| | - Dániel Csókás
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, H1117 Budapest, Hungary
| | - Sigurd Øien-Ødegaard
- Centre for Material Sciences and Nanotechnology, University of Oslo, Sem Sælands vei 26, 0371 Oslo, Norway
| | - Alan Vanderkooy
- Department of Chemistry, BMC Uppsala University, Husargatan 3, 752 37 Uppsala, Sweden
| | - Arvind Kumar Gupta
- Department of Organic Chemistry - Ångström Laboratory, Uppsala University, Lägerhyddsvägen 1, 751 20 Uppsala, Sweden
| | - Anna-Carin C Carlsson
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden
| | - Andreas Orthaber
- Department of Organic Chemistry - Ångström Laboratory, Uppsala University, Lägerhyddsvägen 1, 751 20 Uppsala, Sweden
| | - Anne Fiksdahl
- Department of Chemistry, Norwegian University of Science and Technology, Høgskoleringen 5, 7491 Trondheim, Norway
| | - Imre Pápai
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, H1117 Budapest, Hungary.,Department of Chemistry, University J. Selyeho, 94505 Komárno, Slovakia
| | - Máté Erdélyi
- Department of Chemistry, BMC Uppsala University, Husargatan 3, 752 37 Uppsala, Sweden
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7
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Sit HY, Yang B, Ka-Yan Kung K, Siu-Lun Tam J, Wong MK. Fluorescent Labelling of Glycans with FRET-Based Probes in a Gold(III)-Mediated Three-Component Coupling Reaction. Chempluschem 2020; 84:1739-1743. [PMID: 31943869 DOI: 10.1002/cplu.201900612] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Indexed: 01/18/2023]
Abstract
Single-site multifunctionalization of glycans is of importance in biological studies considering its crucial role in mediating biological events and human diseases. In this paper, a novel approach for multifunctional labelling of glycans has been developed featuring the use of fluorescence resonance energy transfer-based (FRET-based) probes for fluorescent labelling of glycans through a gold(III)-mediated three-component coupling reaction. Oxidation of glycans into aldehydes followed by the A3 -coupling reaction with FRET-based probes resulted in the single-site formation of fluorescent propargylamine products. The conversion of labelled glycans can be revealed by ratiometric analysis of the FRET signals. This labelling approach results in multifunctionalization of glycans with high selectivity and conversion between 66 and 69 %.
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Affiliation(s)
- Hoi-Yi Sit
- The Hong Kong Polytechnic University, Shenzhen Research Institute, Shenzhen, P. R. China.,State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P. R. China
| | - Bin Yang
- The Hong Kong Polytechnic University, Shenzhen Research Institute, Shenzhen, P. R. China.,State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P. R. China
| | - Karen Ka-Yan Kung
- The Hong Kong Polytechnic University, Shenzhen Research Institute, Shenzhen, P. R. China.,State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P. R. China
| | - John Siu-Lun Tam
- The Hong Kong Polytechnic University, Shenzhen Research Institute, Shenzhen, P. R. China.,State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P. R. China
| | - Man-Kin Wong
- The Hong Kong Polytechnic University, Shenzhen Research Institute, Shenzhen, P. R. China.,State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P. R. China
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8
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Segato J, Del Zotto A, Belpassi L, Belanzoni P, Zuccaccia D. Hydration of alkynes catalyzed by [Au(X)(L)(ppy)]X in the green solvent γ-valerolactone under acid-free conditions: the importance of the pre-equilibrium step. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01343a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Stable and robust [Au(H2O)(NHC)(ppy)](X)2 successfully catalyses the hydration of alkynes in GVL, under acid-free conditions. DFT calculation and NMR measurements suggest that pre-equilibrium is the key step of the whole process.
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Affiliation(s)
- Jacopo Segato
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali
- Sezione di Chimica
- Università di Udine
- I-33100 Udine
- Italy
| | - Alessandro Del Zotto
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali
- Sezione di Chimica
- Università di Udine
- I-33100 Udine
- Italy
| | - Leonardo Belpassi
- Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC)
- Consiglio Nazionale delle Ricerche c/o
- Dipartimento di Chimica, Biologia e Biotecnologie
- Università degli Studi di Perugia
- 06123 Perugia
| | - Paola Belanzoni
- Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC)
- Consiglio Nazionale delle Ricerche c/o
- Dipartimento di Chimica, Biologia e Biotecnologie
- Università degli Studi di Perugia
- 06123 Perugia
| | - Daniele Zuccaccia
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali
- Sezione di Chimica
- Università di Udine
- I-33100 Udine
- Italy
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9
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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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10
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Zhang D, Liu D, Li M, Yang Y, Wang Y, Yin H, Liu J, Jia B, Wu X. A simple pyrene-based fluorescent probe for highly selective detection of formaldehyde and its application in live-cell imaging. Anal Chim Acta 2018; 1033:180-184. [PMID: 30172324 DOI: 10.1016/j.aca.2018.05.065] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 05/03/2018] [Accepted: 05/25/2018] [Indexed: 01/25/2023]
Abstract
A novel and simple pyrene-based fluorescent probe (B1) was synthesized and used for the detection of formaldehyde (FA). When B1 was added to FA in CH3CH2OH/HEPES (10 mM, pH = 7.4, 1:99, v/v) solution, the solution system strongly enhanced the fluorescence. Over various small molecular species, probe B1 showed high sensitivity and selectivity for detecting FA, with a low limit of detection (0.107 μM). Furthermore, probe B1 was successfully applied for visualizing FA in human embryonic kidney (HEK293T) cells, demonstrating its value of application in living biomedical samples.
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Affiliation(s)
- Di Zhang
- Institute of Quality Standards and Testing Technology for Agro-Products, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China; Henan Key Laboratory of Grain Quality and Safety and Testing, Zhengzhou, 450002, China; Laboratory of Quality & Safety Risk Assessment for Agro-Products (Zhengzhou), Ministry of Agriculture, Zhengzhou, 450002, China
| | - Dongmei Liu
- Institute of Quality Standards and Testing Technology for Agro-Products, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China; Henan Key Laboratory of Grain Quality and Safety and Testing, Zhengzhou, 450002, China; Laboratory of Quality & Safety Risk Assessment for Agro-Products (Zhengzhou), Ministry of Agriculture, Zhengzhou, 450002, China
| | - Man Li
- Institute of Quality Standards and Testing Technology for Agro-Products, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China; Henan Key Laboratory of Grain Quality and Safety and Testing, Zhengzhou, 450002, China; Laboratory of Quality & Safety Risk Assessment for Agro-Products (Zhengzhou), Ministry of Agriculture, Zhengzhou, 450002, China
| | - Yaqin Yang
- Institute of Quality Standards and Testing Technology for Agro-Products, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China; Henan Key Laboratory of Grain Quality and Safety and Testing, Zhengzhou, 450002, China; Laboratory of Quality & Safety Risk Assessment for Agro-Products (Zhengzhou), Ministry of Agriculture, Zhengzhou, 450002, China
| | - Yun Wang
- Institute of Quality Standards and Testing Technology for Agro-Products, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China; Henan Key Laboratory of Grain Quality and Safety and Testing, Zhengzhou, 450002, China; Laboratory of Quality & Safety Risk Assessment for Agro-Products (Zhengzhou), Ministry of Agriculture, Zhengzhou, 450002, China
| | - Haiyan Yin
- Institute of Quality Standards and Testing Technology for Agro-Products, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China; Henan Key Laboratory of Grain Quality and Safety and Testing, Zhengzhou, 450002, China; Laboratory of Quality & Safety Risk Assessment for Agro-Products (Zhengzhou), Ministry of Agriculture, Zhengzhou, 450002, China
| | - Jihong Liu
- Institute of Quality Standards and Testing Technology for Agro-Products, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China; Henan Key Laboratory of Grain Quality and Safety and Testing, Zhengzhou, 450002, China; Laboratory of Quality & Safety Risk Assessment for Agro-Products (Zhengzhou), Ministry of Agriculture, Zhengzhou, 450002, China
| | - Bin Jia
- Institute of Quality Standards and Testing Technology for Agro-Products, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China; Henan Key Laboratory of Grain Quality and Safety and Testing, Zhengzhou, 450002, China; Laboratory of Quality & Safety Risk Assessment for Agro-Products (Zhengzhou), Ministry of Agriculture, Zhengzhou, 450002, China.
| | - Xujin Wu
- Institute of Quality Standards and Testing Technology for Agro-Products, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China; Henan Key Laboratory of Grain Quality and Safety and Testing, Zhengzhou, 450002, China; Laboratory of Quality & Safety Risk Assessment for Agro-Products (Zhengzhou), Ministry of Agriculture, Zhengzhou, 450002, China.
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11
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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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12
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Ermakova EV, Arslanov VV. Analytical micelles containing amphiphilic aminoanthraquinone solvatochromic reporter receptor. COLLOID JOURNAL 2017. [DOI: 10.1134/s1061933x17060060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Nair AG, McBurney RT, Gatus MRD, Binding SC, Messerle BA. Gold(III) NHC Complexes for Catalyzing Dihydroalkoxylation and Hydroamination Reactions. Inorg Chem 2017; 56:12067-12075. [PMID: 28933838 DOI: 10.1021/acs.inorgchem.7b02161] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A gold(III) complex of an N-heterocyclic carbene based hemilabile ligand with two pendant pyrazole arms (1,3-bis((1H-pyrazol-3-yl)methyl)-2,3-dihydro-1H-imidazole, LH) was synthesized. Complex [LAu(III)Cl3] is an excellent catalyst for promoting dihydroalkoxylation at room temperature, even catalyzing this reaction at 0 °C. [LAu(III)Cl3] is one of the most efficient catalysts reported to date for the spirocyclization of alkynyl diols. Furthermore, [LAu(III)Cl3] catalyzed intra- and intermolecular hydroamination reactions, achieving good to excellent conversions. [LAu(III)Cl3] is a more efficient catalyst than a gold(I) analogue, [LAu(I)Cl]. The dependence of the quantity of weakly coordinating anion [BArF4]- ((3,5-trifluoromethyl)phenyl borate) present on catalysis efficiency was probed for the dihydroalkoxylation reaction. X-ray diffraction analysis of single crystals demonstrated the solid-state structure of gold complexes [LAu(III)Cl3] and [LAu(I)Cl], which displayed the expected square-planar and linear coordination geometries, respectively.
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Affiliation(s)
- Ashwin G Nair
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney 2109, Australia
| | - Roy T McBurney
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney 2109, Australia
| | - Mark R D Gatus
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney 2109, Australia
| | - Samantha C Binding
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney 2109, Australia
| | - Barbara A Messerle
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney 2109, Australia
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14
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Kielesiński Ł, Morawski O, Dobrzycki Ł, Sobolewski AL, Gryko DT. The Coumarin-Dimer Spring-The Struggle between Charge Transfer and Steric Interactions. Chemistry 2017; 23:9174-9184. [PMID: 28500858 DOI: 10.1002/chem.201701387] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Indexed: 01/01/2023]
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
| | - Olaf Morawski
- Institute of Physics; Polish Academy of Sciences; Al. Lotników 32/46 02-668 Warsaw Poland
| | - Łukasz Dobrzycki
- Faculty of Chemistry; Warsaw University; Pasteura 1 00-273 Warsaw Poland
| | - Andrzej L. Sobolewski
- 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
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15
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Querard P, Girard SA, Uhlig N, Li CJ. Gold-catalyzed tandem reactions of amide-aldehyde-alkyne coupling and cyclization-synthesis of 2,4,5-trisubstituted oxazoles. Chem Sci 2015; 6:7332-7335. [PMID: 29861964 PMCID: PMC5950834 DOI: 10.1039/c5sc02933c] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Accepted: 10/05/2015] [Indexed: 12/13/2022] Open
Abstract
We report the first cationic gold(i)-catalyzed one-pot reaction of amide, alkyne and aldehyde followed by cyclization, to successfully access highly substituted oxazoles derivatives in good yields. A single catalyst allows the occurring of this multi-step reaction atom- and step-economically, with water as the only theoretical side product.
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Affiliation(s)
- Pierre Querard
- Department of Chemistry , FQRNT Center for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada .
| | - Simon A Girard
- Department of Chemistry , FQRNT Center for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada .
| | - Nick Uhlig
- Department of Chemistry , FQRNT Center for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada .
| | - Chao-Jun Li
- Department of Chemistry , FQRNT Center for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada .
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