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Knauer L, Wattenberg J, Kroesen U, Strohmann C. The smaller, the better? How the aggregate size affects the reactivity of (trimethylsilyl)methyllithium. Dalton Trans 2019; 48:11285-11291. [PMID: 31268108 DOI: 10.1039/c9dt02182e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unexpected influence of the nature of stabilizing additives to alkyllithium compounds on an aggregate's reactivity was examined experimentally and theoretically.
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Affiliation(s)
- Lena Knauer
- Institute for Inorganic Chemistry
- TU Dortmund University
- 44227 Dortmund
- Germany
| | - Jonathan Wattenberg
- Institute for Inorganic Chemistry
- TU Dortmund University
- 44227 Dortmund
- Germany
| | - Ulrike Kroesen
- Institute for Inorganic Chemistry
- TU Dortmund University
- 44227 Dortmund
- Germany
| | - Carsten Strohmann
- Institute for Inorganic Chemistry
- TU Dortmund University
- 44227 Dortmund
- Germany
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2
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Sharma N, Singh A, Dhau JS. Synthesis, Characterization, and Computational Studies of Selenium Derivatives of 3,5‐Dichloropyridine. J Heterocycl Chem 2017. [DOI: 10.1002/jhet.2804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Neha Sharma
- Department of ChemistryPunjabi University Patiala 147002 India
| | - Avtar Singh
- Department of ChemistrySri Guru Teg Bahadur Khalsa College Anandpur Sahib 140118 India
| | - Jaspreet S. Dhau
- Department of ChemistryFlorida Polytechnic University Lakeland FL 33805 USA
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3
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Tung TT, Jakobsen TH, Dao TT, Fuglsang AT, Givskov M, Christensen SB, Nielsen J. Fusaric acid and analogues as Gram-negative bacterial quorum sensing inhibitors. Eur J Med Chem 2016; 126:1011-1020. [PMID: 28033578 DOI: 10.1016/j.ejmech.2016.11.044] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 10/27/2016] [Accepted: 11/21/2016] [Indexed: 12/31/2022]
Abstract
Taking advantage of microwave-assisted synthesis, efficient and expedite procedures for preparation of a library of fusaric acid and 39 analogues are reported. The fusaric acid analogues were tested in cell-based screening assays for inhibition of the las and rhl quorum sensing system in Pseudomonas aeruginosa and the lux quorum sensing system in Vibrio fischeri. Eight of the 40 compounds in the library including fusaric acid inhibited lux quorum sensing and one compound inhibited activity of the las quorum sensing system. To our delight, none of the compounds showed growth inhibitory effects in the tested concentration ranges.
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Affiliation(s)
- Truong Thanh Tung
- Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - Tim Holm Jakobsen
- Costerton Biofilm Center, Faculty of Health Sciences, Department of Immunology and Microbiology, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Trong Tuan Dao
- Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark; Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Anja Thoe Fuglsang
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Michael Givskov
- Costerton Biofilm Center, Faculty of Health Sciences, Department of Immunology and Microbiology, Blegdamsvej 3B, 2200 Copenhagen, Denmark; Singapore Centre for Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, 637551, Singapore
| | - Søren Brøgger Christensen
- Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark.
| | - John Nielsen
- Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark.
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4
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Greer JA, Blair VL, Thompson CD, Andrews PC. Simplifying metal-'ate' chemistry: formation and comprehensive characterisation of a homo-metallic amido lithiate complex. Dalton Trans 2016; 45:10887-90. [PMID: 27327036 DOI: 10.1039/c6dt01630h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Addition of TMEDA to lithium allyl-1-naphthylamide in a 1 : 1 ratio afforded the novel amido lithium/lithiate complex, [Li(TMEDA)2][Li{N(1-naph)(CH2CH[double bond, length as m-dash]CH2)}2]. (7)Li NMR and computational calculations indicate this model to be representative of the solution state, with (1)H and (13)C NMR showing a 1,3-sigmatropic rearrangement. [Li{N(1-naph)(CH2CH[double bond, length as m-dash]CH2)}·Et2O]2, and [Li{N(1-naph) (CH2CH[double bond, length as m-dash]CH2)}·PMDETA] , are presented for comparison.
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Affiliation(s)
- Jamie A Greer
- School of Chemistry, Monash University, Clayton, Victoria 3168, Australia.
| | - Victoria L Blair
- School of Chemistry, Monash University, Clayton, Victoria 3168, Australia.
| | | | - Philip C Andrews
- School of Chemistry, Monash University, Clayton, Victoria 3168, Australia.
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Dhau JS, Singh A, Kasetti Y, Bhatia S, Bharatam PV, Brandão P, Félix V, Singh KN. A study on the BF3 directed lithiation of 3-chloro- and 3-bromopyridine. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.10.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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7
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Mongin F, Harrison-Marchand A. Mixed AggregAte (MAA): A Single Concept for All Dipolar Organometallic Aggregates. 2. Syntheses and Reactivities of Homo/HeteroMAAs. Chem Rev 2013; 113:7563-727. [DOI: 10.1021/cr3002966] [Citation(s) in RCA: 149] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Florence Mongin
- Equipe Chimie et Photonique Moléculaires, Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Bât. 10A, Case 1003, Campus de Beaulieu, Avenue du Général Leclerc, 35042 Rennes Cédex, France
| | - Anne Harrison-Marchand
- Laboratoire COBRA de l′Université de Rouen, INSA de Rouen, CNRS, UMR 6014 & FR 3038, IRCOF, Rue Tesnière, 76821 Mont St Aignan Cédex, France
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8
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Dhau JS, Singh A, Kasetti Y, Bharatam PV. Complex-Induced Proximity Effect in the Regioselective Lithiation of Pyridine Derivatives. European J Org Chem 2012. [DOI: 10.1002/ejoc.201101592] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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9
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Snégaroff K, Nguyen TT, Marquise N, Halauko YS, Harford PJ, Roisnel T, Matulis VE, Ivashkevich OA, Chevallier F, Wheatley AEH, Gros PC, Mongin F. Deprotonative Metalation of Chloro- and Bromopyridines Using Amido-Based Bimetallic Species and Regioselectivity-Computed CH Acidity Relationships. Chemistry 2011; 17:13284-97. [PMID: 22006709 DOI: 10.1002/chem.201101993] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Indexed: 11/07/2022]
Affiliation(s)
- Katia Snégaroff
- Chimie et Photonique Moléculaires, UMR 6510 CNRS, Université de Rennes 1, Bâtiment 10A, Case 1003, Campus Scientifique de Beaulieu, 35042 Rennes Cedex, France
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Jochmann P, Maslek S, Spaniol TP, Okuda J. Allyl Calcium Compounds: Synthesis and Structure of Bis(η3-1-alkenyl)calcium. Organometallics 2011. [DOI: 10.1021/om200012k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Phillip Jochmann
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Stefanie Maslek
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Thomas P. Spaniol
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Jun Okuda
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
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11
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Functional polypyridine ligands from copper-mediated room temperature coupling of 4-chloro-2-trimethylsilylpyridine. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.04.133] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gros PC, Fort Y. Combinations of Alkyllithiums and Lithium Aminoalkoxides for Generation of Functional Pyridine Organometallics and Derivatives. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900324] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Philippe C. Gros
- Groupe SOR, SRSMC, CNRS, Nancy Université, Faculté des Sciences, Boulevard des Aiguillettes, 54506 Vandoeuvre‐Lès‐Nancy, France, Fax: +33‐3‐83684979
| | - Yves Fort
- Groupe SOR, SRSMC, CNRS, Nancy Université, Faculté des Sciences, Boulevard des Aiguillettes, 54506 Vandoeuvre‐Lès‐Nancy, France, Fax: +33‐3‐83684979
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Gros PC, Elaachbouni F. Bromine-lithium exchange under non-cryogenic conditions: TMSCH(2)Li-LiDMAE promoted C-2 lithiation of 2,3-dibromopyridine. Chem Commun (Camb) 2008:4813-5. [PMID: 18830502 DOI: 10.1039/b810453k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first C-2 selective bromine-lithium exchange in 2,3-dibromopyridine was performed at 0 degrees C in toluene using the TMSCH(2)Li-LiDMAE reagent.
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Affiliation(s)
- Philippe C Gros
- Groupe SOR, SRSMC, CNRS, Nancy Université, Faculté des Sciences, Boulevard des Aiguillettes, F-54506, Vandoeuvre-Lès-Nancy, France.
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Schlosser M, Mongin F. Pyridine elaboration through organometallic intermediates: regiochemical control and completeness. Chem Soc Rev 2007; 36:1161-72. [PMID: 17576483 DOI: 10.1039/b706241a] [Citation(s) in RCA: 193] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pyridines carrying heterosubstituents (such as carboxy, amido, amino, alkoxy or trifluoromethyl groups or solely individual halogen atoms) can be readily and site selectively metalated. Subsequent reaction with a suitable electrophile opens rational access to a wealth of new building blocks for the synthesis of biologically active compounds. This approach relies on organometallic methods, which are both efficacious and extremely flexible as far as the substitution site and the product structure are concerned (86 references).
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Affiliation(s)
- Manfred Schlosser
- Institute of Chemical Sciences and Engineering (ISIC), Ecole Polytechnique Fédérale, BCh, CH-1015 Lausanne, Switzerland.
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Doudouh A, Woltermann C, Gros PC. TMSCH2Li and TMSCH2Li−LiDMAE: Efficient Reagents for Noncryogenic Halogen−Lithium Exchange in Bromopyridines. J Org Chem 2007; 72:4978-80. [PMID: 17523672 DOI: 10.1021/jo070620j] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
TMSCH(2)Li and TMSCH(2)Li-LiDMAE have been used efficiently for bromine-lithium exchange in 2-bromo-, 3-bromo-, and 2,5-dibromopyridines under noncryogenic conditions, while low temperatures (-78 to -100 degrees C) are always needed with n-BuLi. The aminoalkoxide LiDMAE induced a remarkable C-2 selectivity with 2,5-dibromopyridines in toluene at 0 degrees C, which was unprecedented at such a temperature. The lithiopyridines were successfully reacted with electrophiles also under noncryogenic conditions giving the expected adducts in good yields.
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Affiliation(s)
- Abdelatif Doudouh
- Synthèse Organométallique et Réactivité, UMR CNRS 7565, Nancy Université, Université Henri Poincaré, Boulevard des Aiguillettes, 54506 Vandoeuvre-lès-Nancy, France
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Gros PC, Doudouh A, Woltermann C. TMSCH2Li-induced regioselective lithiation of (S)-nicotine. Org Biomol Chem 2006; 4:4331-5. [PMID: 17102878 DOI: 10.1039/b612786j] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first regioselective C-4 lithiation of (S)-nicotine has been realized using TMSCH2Li as basic reagent in toluene. The reaction proceeded under mild conditions with a small excess of electrophile. The 4-chloro derivative was subsequently metallated at C-5 with the same basic reagent in THF at -78 degrees C. This methodology opens a straightforward access to functional diversity in (S)-nicotine chemistry.
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Affiliation(s)
- Philippe C Gros
- Synthèse Organométallique et Réactivité, UMR CNRS-UHP 7565 Université Henri Poincaré, Faculté des Sciences, Boulevard des Aiguillettes, 54506, Vandoeuvre-lès-Nancy, France.
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