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Si T, Cho H, Kim HY, Oh K. ortho-Naphthoquinone-Catalyzed Aerobic Hydrodeamination of Aryl Amines via in Situ De-diazotization of Aryl Diazonium Species. Org Lett 2022; 24:8531-8535. [DOI: 10.1021/acs.orglett.2c03523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tengda Si
- Center for Metareceptome Research, Graduate School of Pharmaceutical Sciences, Chung-Ang University, 84 Heukseok-ro, Dongjak, Seoul06974, Republic of Korea
| | - Hana Cho
- Center for Metareceptome Research, Graduate School of Pharmaceutical Sciences, Chung-Ang University, 84 Heukseok-ro, Dongjak, Seoul06974, Republic of Korea
| | - Hun Young Kim
- Department of Global Innovative Drugs, Chung-Ang University, 84 Heukseok-ro, Dongjak, Seoul06974, Republic of Korea
| | - Kyungsoo Oh
- Center for Metareceptome Research, Graduate School of Pharmaceutical Sciences, Chung-Ang University, 84 Heukseok-ro, Dongjak, Seoul06974, Republic of Korea
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2
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Naime J, Mamun MSA, Aly Saad Aly M, Maniruzzaman M, Badal MMR, Karim KMR. Synthesis, characterization and application of a novel polyazo dye as a universal acid-base indicator. RSC Adv 2022; 12:28034-28042. [PMID: 36320250 PMCID: PMC9527568 DOI: 10.1039/d2ra04930a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023] Open
Abstract
A novel organic polyazo dye is synthesized by the diazotization of aromatic aniline, followed by coupling it with sulfanilic acid and N,N-dimethylaniline. Characterization was done by 1H-NMR, 13C-NMR, and FTIR spectroscopy. Differential scanning calorimetry (DSC) reveals that phase transition for this molecule is exothermic. The optical band gap is estimated from the absorption cutoff point using UV-Visible spectroscopy. Thermal gravimetric analysis (TGA) addresses the thermal stability of the molecule and is found to be at ∼250 °C. The structure of the synthesized molecule is analogous to that of methyl orange and contains three azo groups. These three azo groups help accept more than two protons and provide two pK a values when diprotic acid or a mixture of acids is used in different titrations. Specifically, when a polybasic acid is in strong base titration, the pK a values were found to be 3.5 and 9.1. Moreover, for strong base and (strong + weak) acid mixture titration, the pK a values are found to be 9.2 and 3.3. Furthermore, the pK a values are found to be 8.6 and 2.8 for (strong and weak) base mixture and (strong and weak) acid mixture titration, respectively. Owing to its increased proton accepting capacity, it can be found in the two pH ranges of 2.1-3.8 for orange color and 8.2-9.8 for yellow color, thus indicating a unique property as a universal indicator for acid-base titration. The dissociation constant of this dye is found to be 3.4 × 10-6, determined in a mixed aqueous solution of 10 wt% ethanol, and a linear relationship between pK a and pH is observed in this solvent system.
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Affiliation(s)
- Jannatul Naime
- Chemistry Discipline, School of Science, Engineering and Technology, Khulna University Khulna-9208 Bangladesh
| | - Muhammad Shamim Al Mamun
- Chemistry Discipline, School of Science, Engineering and Technology, Khulna University Khulna-9208 Bangladesh
| | - Mohamed Aly Saad Aly
- Department of Electrical and Computer Engineering at Georgia Tech Shenzhen Institute (GTSI), Tianjin University Shenzhen Guangdong 518052 China
| | - Md Maniruzzaman
- Department of Chemistry, Khulna University of Engineering and Technology Khulna-9203 Bangladesh
| | - Md Mizanur Rahman Badal
- Department of Chemistry, Khulna University of Engineering and Technology Khulna-9203 Bangladesh
| | - Kaykobad Md Rezaul Karim
- Chemistry Discipline, School of Science, Engineering and Technology, Khulna University Khulna-9208 Bangladesh
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3
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Hofmann L, Altmann LM, Fischer O, Prusko L, Xiao G, Westwood NJ, Heinrich MR. Cleavage of Organosolv Lignin to Phenols Using Nitrogen Monoxide and Hydrazine. ACS OMEGA 2021; 6:19400-19408. [PMID: 34368527 PMCID: PMC8340100 DOI: 10.1021/acsomega.1c00996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 07/01/2021] [Indexed: 06/13/2023]
Abstract
From the variety of methods known for the depolymerization of organosolv lignin, a broad range of diversely substituted aromatic compounds are available today. In the present work, a novel two-step reaction sequence is reported, which is focused on the formation of phenols. While the first step of the depolymerization strategy comprises the 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ)-catalyzed oxidation of organosolv lignin with nitrogen monoxide so that two waste materials are combined, cleavage to the phenolic target compounds is achieved in the second step employing hydrazine and potassium hydroxide under Wolff-Kishner-type conditions. Besides the fact that the novel strategy proceeds via an untypical form of oxidized organosolv lignin, the two-step sequence is further able to provide phenols as cleavage products, which bear no substituent at the 4-position.
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Affiliation(s)
- Laura
Elena Hofmann
- Department
of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Str. 10, 91058 Erlangen, Germany
| | - Lisa-Marie Altmann
- Department
of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Str. 10, 91058 Erlangen, Germany
| | - Oliver Fischer
- Department
of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Str. 10, 91058 Erlangen, Germany
| | - Lea Prusko
- Department
of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Str. 10, 91058 Erlangen, Germany
| | - Ganyuan Xiao
- School
of Chemistry and Biomedical Sciences Research Complex, University of St. Andrews and EaStCHEM North Haugh, St Andrews KY16 9ST, Fife, United Kingdom
| | - Nicholas J. Westwood
- School
of Chemistry and Biomedical Sciences Research Complex, University of St. Andrews and EaStCHEM North Haugh, St Andrews KY16 9ST, Fife, United Kingdom
| | - Markus R. Heinrich
- Department
of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Str. 10, 91058 Erlangen, Germany
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4
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Hofmann LE, Hofmann D, Prusko L, Altmann L, Heinrich MR. Sequential Cleavage of Lignin Systems by Nitrogen Monoxide and Hydrazine. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901641] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Laura Elena Hofmann
- Department of Pharmaceutical ChemistryFriedrich-Alexander Universität Erlangen-Nürnberg 91058 Erlangen
| | - Dagmar Hofmann
- Department of Pharmaceutical ChemistryFriedrich-Alexander Universität Erlangen-Nürnberg 91058 Erlangen
| | - Lea Prusko
- Department of Pharmaceutical ChemistryFriedrich-Alexander Universität Erlangen-Nürnberg 91058 Erlangen
| | - Lisa‐Marie Altmann
- Department of Pharmaceutical ChemistryFriedrich-Alexander Universität Erlangen-Nürnberg 91058 Erlangen
| | - Markus R. Heinrich
- Department of Pharmaceutical ChemistryFriedrich-Alexander Universität Erlangen-Nürnberg 91058 Erlangen
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5
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Felpin FX, Sengupta S. Biaryl synthesis with arenediazonium salts: cross-coupling, CH-arylation and annulation reactions. Chem Soc Rev 2019; 48:1150-1193. [PMID: 30608075 DOI: 10.1039/c8cs00453f] [Citation(s) in RCA: 120] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The rich legacy of arenediazonium salts in the synthesis of unsymmetrical biaryls, built around the seminal works of Pschorr, Gomberg and Bachmann more than a century ago, continues to make important contributions at various evolutionary stages of modern biaryl synthesis. Based on in-depth mechanistic analysis and design of novel pathways and reaction conditions, the scope of biaryl synthesis with arenediazonium salts has enormously expanded in recent years through applications of transition metal/photoredox-catalysed cross-coupling, thermal/photosensitized radical chain CH-arylation of (hetero)arenes and arylative radical annulation reactions with alkynes. These recent developments have provided facile synthetic access to a wide variety of unsymmetrical biaryls of pharmaceutical, agrochemical and optoelectronic importance with green scale-up options and created opportunities for late-stage modification of peptides, nucleosides, carbon nanotubes and electrodes, the details of which are captured in this review.
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Affiliation(s)
- François-Xavier Felpin
- Université de Nantes, UFR des Sciences et des Techniques, CNRS UMR 6230, CEISAM, 2 rue de la Houssinière, 44322 Nantes Cedex 3, France. and Institut Universitaire de France, 1 rue Descartes, 75231 Paris Cedex 05, France
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Hofmann LE, Mach L, Heinrich MR. Nitrogen Oxides and Nitric Acid Enable the Sustainable Hydroxylation and Nitrohydroxylation of Benzenes under Visible Light Irradiation. J Org Chem 2017; 83:431-436. [PMID: 29171756 DOI: 10.1021/acs.joc.7b02333] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A new type of waste recycling strategy is described in which nitrogen oxides or nitric acid are directly employed in photocatalyzed hydroxylations and nitrohydroxylations of benzenes. Through these transformations, otherwise costly denitrification can be combined with the synthesis of valuable compounds for various applications.
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Affiliation(s)
- Laura Elena Hofmann
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg , Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
| | - Leonard Mach
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg , Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
| | - Markus R Heinrich
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg , Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
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7
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Taniguchi T, Murata A, Takeda M, Mizuno T, Nomoto A, Ogawa A. Atom‐Economical Synthesis of Unsymmetrical Diaryl Selenides from Arylhydrazines and Diaryl Diselenides. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700938] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Toshihide Taniguchi
- Seika Corporation 1‐1‐82 Kozaika 641‐0007 Wakayama Japan
- Department of Applied Chemistry Graduate School of Engineering Osaka Prefecture University 1‐1 Gakuen‐cho, Naka‐ku 599‐8531 Sakai, Osaka Japan
| | - Akinori Murata
- Department of Applied Chemistry Graduate School of Engineering Osaka Prefecture University 1‐1 Gakuen‐cho, Naka‐ku 599‐8531 Sakai, Osaka Japan
| | | | - Takumi Mizuno
- Morinomiya Center Osaka Research Institute of Industrial Science and Technology 1‐6‐50 Morinomiya 536‐8553 Joto‐ku, Osaka Japan
| | - Akihiro Nomoto
- Department of Applied Chemistry Graduate School of Engineering Osaka Prefecture University 1‐1 Gakuen‐cho, Naka‐ku 599‐8531 Sakai, Osaka Japan
| | - Akiya Ogawa
- Department of Applied Chemistry Graduate School of Engineering Osaka Prefecture University 1‐1 Gakuen‐cho, Naka‐ku 599‐8531 Sakai, Osaka Japan
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Hofmann J, Gans E, Clark T, Heinrich MR. Radical Arylation of Anilines and Pyrroles via Aryldiazotates. Chemistry 2017; 23:9647-9656. [PMID: 28440884 DOI: 10.1002/chem.201701429] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Indexed: 12/15/2022]
Abstract
The radical arylation of anilines and pyrroles can be achieved under transition-metal- and catalyst-free conditions by using aryldiazotates in strongly alkaline aqueous solutions. The aryldiazotates act as protected diazonium ions, which do not undergo azo coupling with electron-rich aromatic substrates, but can still serve as an aryl radical source at slightly elevated temperatures. Based on an improved preparation of aryldiazotates in aqueous solution, homolytic aromatic substitutions of anilines and pyrroles were conducted with good overall yields and high regioselectivity. Moreover, DFT calculations provided further mechanistic insights.
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Affiliation(s)
- Josefa Hofmann
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander Universität Erlangen-Nürnberg, Schuhstraße 19, 91052, Erlangen, Germany
| | - Eva Gans
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander Universität Erlangen-Nürnberg, Schuhstraße 19, 91052, Erlangen, Germany
| | - Timothy Clark
- Computer-Chemie-Centrum, Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nägelsbachstraße 25, 91052, Erlangen, Germany
| | - Markus R Heinrich
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander Universität Erlangen-Nürnberg, Schuhstraße 19, 91052, Erlangen, Germany
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Taniguchi T, Naka T, Imoto M, Takeda M, Nakai T, Mihara M, Mizuno T, Nomoto A, Ogawa A. Transition-Metal-Free and Oxidant-Free Cross-Coupling of Arylhydrazines with Disulfides: Base-Promoted Synthesis of Unsymmetrical Aryl Sulfides. J Org Chem 2017; 82:6647-6655. [DOI: 10.1021/acs.joc.7b00767] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Toshihide Taniguchi
- Seika Corporation, 1-1-82 Kozaika, Wakayama 641-0007, Japan
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Takuya Naka
- Seika Corporation, 1-1-82 Kozaika, Wakayama 641-0007, Japan
| | | | | | - Takeo Nakai
- Morinomiya
Center, Osaka Research Institute of Industrial Science and Technology, 1-6-50 Morinomiya, Joto-ku, Osaka 536-8553, Japan
| | - Masatoshi Mihara
- Morinomiya
Center, Osaka Research Institute of Industrial Science and Technology, 1-6-50 Morinomiya, Joto-ku, Osaka 536-8553, Japan
| | - Takumi Mizuno
- Morinomiya
Center, Osaka Research Institute of Industrial Science and Technology, 1-6-50 Morinomiya, Joto-ku, Osaka 536-8553, Japan
| | - Akihiro Nomoto
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Akiya Ogawa
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
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Hofmann D, Gans E, Krüll J, Heinrich MR. Sustainable Synthesis of Balsalazide and Sulfasalazine Based on Diazotization with Low Concentrations of Nitrogen Dioxide in Air. Chemistry 2017; 23:4042-4045. [PMID: 28054726 DOI: 10.1002/chem.201605359] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Indexed: 01/07/2023]
Abstract
Low concentrations of nitrogen dioxide, which arises as a side product from a range of industrial processes, can effectively be recycled through the diazotization of anilines. The studies reported herein now demonstrate that the removal of nitrogen dioxide from gas streams is even more effective when hydrophilic anilines are used as starting materials. The diazonium salts, which are obtained in this way in up to quantitative yields, can directly be employed in azo coupling reactions, thus opening up an attractive route to the industrially important group of azo compounds.
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Affiliation(s)
- Dagmar Hofmann
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schuhstraße 19, 91052, Erlangen, Germany
| | - Eva Gans
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schuhstraße 19, 91052, Erlangen, Germany
| | - Jasmin Krüll
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schuhstraße 19, 91052, Erlangen, Germany
| | - Markus R Heinrich
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schuhstraße 19, 91052, Erlangen, Germany
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Kindt S, Wicht K, Heinrich MR. Thermally Induced Carbohydroxylation of Styrenes with Aryldiazonium Salts. Angew Chem Int Ed Engl 2016; 55:8744-7. [PMID: 27273583 PMCID: PMC5089591 DOI: 10.1002/anie.201601656] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 04/21/2016] [Indexed: 01/04/2023]
Abstract
The radical carbohydroxylation of styrenes with aryldiazonium salts has been achieved under mild thermal conditions. A broad range of aryldiazonium salts was tolerated, and the reaction principle based on a radical-polar crossover mechanism could be extended to carboetherification as well as to a two-step, metal-free variant of the Meerwein arylation leading to stilbenes.
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Affiliation(s)
- Stephanie Kindt
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schuhstrasse 19, 91052, Erlangen, Germany
| | - Karina Wicht
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schuhstrasse 19, 91052, Erlangen, Germany
| | - Markus R Heinrich
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schuhstrasse 19, 91052, Erlangen, Germany.
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13
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Kindt S, Wicht K, Heinrich MR. Thermisch induzierte Carbohydroxylierung von Styrolen mit Aryldiazoniumsalzen. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601656] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Stephanie Kindt
- Department Chemie und Pharmazie, Pharmazeutische Chemie; Friedrich-Alexander-Universität Erlangen-Nürnberg; Schuhstraße 19 91052 Erlangen Deutschland
| | - Karina Wicht
- Department Chemie und Pharmazie, Pharmazeutische Chemie; Friedrich-Alexander-Universität Erlangen-Nürnberg; Schuhstraße 19 91052 Erlangen Deutschland
| | - Markus R. Heinrich
- Department Chemie und Pharmazie, Pharmazeutische Chemie; Friedrich-Alexander-Universität Erlangen-Nürnberg; Schuhstraße 19 91052 Erlangen Deutschland
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