51
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Khake SM, Jain S, Patel UN, Gonnade RG, Vanka K, Punji B. Mechanism of Nickel(II)-Catalyzed C(2)–H Alkynylation of Indoles with Alkynyl Bromide. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00177] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Shrikant M. Khake
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110 020, India
| | | | - Ulhas N. Patel
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110 020, India
| | | | | | - Benudhar Punji
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110 020, India
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52
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Patel UN, Punji B. A Copper- and Phosphine-Free Nickel(II)-Catalyzed Method for C−H Bond Alkynylation of Benzothiazoles and Related Azoles. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800243] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Ulhas N. Patel
- Organometallic Synthesis and Catalysis Group; Chemical Engineering Division; CSIR-National Chemical Laboratory (CSIR-NCL); Dr. Homi Bhabha Road Pune- 411 008 Maharashtra India
| | - Benudhar Punji
- Organometallic Synthesis and Catalysis Group; Chemical Engineering Division; CSIR-National Chemical Laboratory (CSIR-NCL); Dr. Homi Bhabha Road Pune- 411 008 Maharashtra India
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53
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Ma J, Kass SR. Asymmetric Arylation of 2,2,2-Trifluoroacetophenones Catalyzed by Chiral Electrostatically-Enhanced Phosphoric Acids. Org Lett 2018; 20:2689-2692. [PMID: 29696976 DOI: 10.1021/acs.orglett.8b00900] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A series of highly reactive metal-free chiral phosphoric acids possessing positively charged phosphonium ion substituents are reported and have been applied to Friedel-Crafts alkylations of indoles and 2,2,2-trifluoromethyl aryl ketones. These catalysts are orders-of-magnitude more active and have similar or better enantioselectivities than their noncharged analogues. High tolerance to a range of substrates with electron-withdrawing and electron-donating substituents was also observed.
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Affiliation(s)
- Jie Ma
- Department of Chemistry , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , United States
| | - Steven R Kass
- Department of Chemistry , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , United States
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54
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Liu L, Liu Y, Zhang G, Ge Y, Fan X, Lin F, Wang J, Zheng H, Xie X, Zeng X, Chen PR. Genetically Encoded Chemical Decaging in Living Bacteria. Biochemistry 2017; 57:446-450. [PMID: 29171270 DOI: 10.1021/acs.biochem.7b01017] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report the genetically encoded chemical decaging strategy for protein activation in living bacterial cells. In contrast to the metabolically labile photocaging groups inside Escherichia coli, our chemical decaging strategy that relies on the inverse electron-demand Diels-Alder (iDA) reaction is compatible with the intracellular environment of bacteria, which can be a general tool for gain-of-function study of a given protein in prokaryotic systems. By applying this strategy for in situ activation of the indole-producing enzyme TnaA, we built an orthogonal and chemically inducible indole production pathway inside E. coli cells, which revealed the role of indole in bacterial antibiotic tolerance.
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Affiliation(s)
- Lu Liu
- Beijing National Laboratory for Molecular Sciences, Synthetic and Functional Biomolecules Center, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | - Yanjun Liu
- Beijing National Laboratory for Molecular Sciences, Synthetic and Functional Biomolecules Center, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | - Gong Zhang
- Beijing National Laboratory for Molecular Sciences, Synthetic and Functional Biomolecules Center, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | - Yun Ge
- Beijing National Laboratory for Molecular Sciences, Synthetic and Functional Biomolecules Center, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | - Xinyuan Fan
- Beijing National Laboratory for Molecular Sciences, Synthetic and Functional Biomolecules Center, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | - Feng Lin
- Peking-Tsinghua Center for Life Sciences , Beijing 100871, China.,Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, China
| | - Jie Wang
- Peking-Tsinghua Center for Life Sciences , Beijing 100871, China.,Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, China
| | - Huangtao Zheng
- Peking-Tsinghua Center for Life Sciences , Beijing 100871, China.,Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, China
| | - Xiao Xie
- Beijing National Laboratory for Molecular Sciences, Synthetic and Functional Biomolecules Center, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | - Xiangmei Zeng
- Peking-Tsinghua Center for Life Sciences , Beijing 100871, China.,Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, China
| | - Peng R Chen
- Beijing National Laboratory for Molecular Sciences, Synthetic and Functional Biomolecules Center, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China.,Peking-Tsinghua Center for Life Sciences , Beijing 100871, China.,Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, China
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55
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Quorum-Sensing Systems as Targets for Antivirulence Therapy. Trends Microbiol 2017; 26:313-328. [PMID: 29132819 DOI: 10.1016/j.tim.2017.10.005] [Citation(s) in RCA: 276] [Impact Index Per Article: 39.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 09/26/2017] [Accepted: 10/20/2017] [Indexed: 02/08/2023]
Abstract
The development of novel therapies to control diseases caused by antibiotic-resistant pathogens is one of the major challenges we are currently facing. Many important plant, animal, and human pathogens regulate virulence by quorum sensing, bacterial cell-to-cell communication with small signal molecules. Consequently, a significant research effort is being undertaken to identify and use quorum-sensing-interfering agents in order to control diseases caused by these pathogens. In this review, an overview of our current knowledge of quorum-sensing systems of Gram-negative model pathogens is presented as well as the link with virulence of these pathogens, and recent advances and challenges in the development of quorum-sensing-interfering therapies are discussed.
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56
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Cabrero-Antonino JR, Adam R, Junge K, Beller M. Cobalt-catalysed reductive C-H alkylation of indoles using carboxylic acids and molecular hydrogen. Chem Sci 2017; 8:6439-6450. [PMID: 29163930 PMCID: PMC5632795 DOI: 10.1039/c7sc02117h] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 07/11/2017] [Indexed: 12/29/2022] Open
Abstract
The direct CH-alkylation of indoles using carboxylic acids is presented for the first time. The catalytic system based on the combination of Co(acac)3 and 1,1,1-tris(diphenylphosphinomethyl)-ethane (Triphos, L1), in the presence of Al(OTf)3 as co-catalyst, is able to perform the reductive alkylation of 2-methyl-1H-indole with a wide range of carboxylic acids. The utility of the protocol was further demonstrated through the C3 alkylation of several substituted indole derivatives using acetic, phenylacetic or diphenylacetic acids. In addition, a careful selection of the reaction conditions allowed to perform the selective C3 alkenylation of some indole derivatives. Moreover, the alkenylation of C2 position of 3-methyl-1H-indole was also possible. Control experiments indicate that the aldehyde, in situ formed from the carboxylic acid hydrogenation, plays a central role in the overall process. This new protocol enables the direct functionalization of indoles with readily available and stable carboxylic acids using a non-precious metal based catalyst and hydrogen as reductant.
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Affiliation(s)
- Jose R Cabrero-Antonino
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock , Albert-Einstein-Straße 29a , 18059 Rostock , Germany .
| | - Rosa Adam
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock , Albert-Einstein-Straße 29a , 18059 Rostock , Germany .
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock , Albert-Einstein-Straße 29a , 18059 Rostock , Germany .
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock , Albert-Einstein-Straße 29a , 18059 Rostock , Germany .
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57
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Di Gregorio G, Mari M, Bartoccini F, Piersanti G. Iron-Catalyzed Direct C3-Benzylation of Indoles with Benzyl Alcohols through Borrowing Hydrogen. J Org Chem 2017; 82:8769-8775. [DOI: 10.1021/acs.joc.7b01603] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giovanni Di Gregorio
- Department of Biomolecular
Sciences, University of Urbino “Carlo Bo”, P.zza Rinascimento
6, 61029 Urbino, Pesaro and Urbino (PU), Italy
| | - Michele Mari
- Department of Biomolecular
Sciences, University of Urbino “Carlo Bo”, P.zza Rinascimento
6, 61029 Urbino, Pesaro and Urbino (PU), Italy
| | - Francesca Bartoccini
- Department of Biomolecular
Sciences, University of Urbino “Carlo Bo”, P.zza Rinascimento
6, 61029 Urbino, Pesaro and Urbino (PU), Italy
| | - Giovanni Piersanti
- Department of Biomolecular
Sciences, University of Urbino “Carlo Bo”, P.zza Rinascimento
6, 61029 Urbino, Pesaro and Urbino (PU), Italy
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58
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Hilaire MR, Mukherjee D, Troxler T, Gai F. Solvent Dependence of Cyanoindole Fluorescence Lifetime. Chem Phys Lett 2017; 685:133-138. [PMID: 29225366 DOI: 10.1016/j.cplett.2017.07.038] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Several cyanotryptophans have been shown to be useful biological fluorophores. However, how their fluorescence lifetimes vary with solvent has not been examined. In this regard, herein we measure the fluorescence decay kinetics as well as the absorption and emission spectra of six cyanoindoles in different solvents. In particular, we find, among other results, that only 4-cyanoindole affords a long fluorescence lifetime and hence high quantum yield in H2O. Therefore, our measurements provide not only a guide for choosing which cyanotryptophan to use in practice but also data for computational modeling of the substitution effect on the electronic transitions of indole.
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Affiliation(s)
- Mary Rose Hilaire
- Department of Chemistry, University of Pennsylvania, 231 South 34 Street, Philadelphia, PA 19104, USA
| | - Debopreeti Mukherjee
- Department of Chemistry, University of Pennsylvania, 231 South 34 Street, Philadelphia, PA 19104, USA
| | - Thomas Troxler
- Department of Chemistry, University of Pennsylvania, 231 South 34 Street, Philadelphia, PA 19104, USA.,Ultrafast Optical Processes Laboratory, University of Pennsylvania, 231 South 34 Street, Philadelphia, PA 19104, USA
| | - Feng Gai
- Department of Chemistry, University of Pennsylvania, 231 South 34 Street, Philadelphia, PA 19104, USA.,Ultrafast Optical Processes Laboratory, University of Pennsylvania, 231 South 34 Street, Philadelphia, PA 19104, USA
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59
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Lipase-Catalyzed Synthesis of Indolyl 4H-Chromenes via a Multicomponent Reaction in Ionic Liquid. Catalysts 2017. [DOI: 10.3390/catal7060185] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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60
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Bodelón G, Montes-García V, Costas C, Pérez-Juste I, Pérez-Juste J, Pastoriza-Santos I, Liz-Marzán LM. Imaging Bacterial Interspecies Chemical Interactions by Surface-Enhanced Raman Scattering. ACS NANO 2017; 11:4631-4640. [PMID: 28460167 DOI: 10.1021/acsnano.7b00258] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Microbes produce bioactive chemical compounds to influence the physiology and growth of their neighbors, and our understanding of their biological activities may be enhanced by our ability to visualize such molecules in vivo. We demonstrate here the application of surface-enhanced Raman scattering spectroscopy for simultaneous detection of quorum-sensing-regulated pyocyanin and violacein, produced respectively by Pseudomonas aeruginosa and Chromobacterium violaceum bacterial colonies, grown as a coculture on agar-based plasmonic substrates. Our plasmonic approach allowed us to visualize the expression and spatial distribution of the microbial metabolites in the coculture taking place as a result of interspecies chemical interactions. By combining surface-enhanced Raman scattering spectroscopy with analysis of gene expression we provide insight into the chemical interplay occurring between the interacting bacterial species. This highly sensitive, cost-effective, and easy to implement approach allows spatiotemporal imaging of cellular metabolites in live microbial colonies grown on agar with no need for sample preparation, thereby providing a powerful tool for the analysis of microbial chemotypes.
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Affiliation(s)
- Gustavo Bodelón
- Departamento de Química Física and Biomedical Research Center (CINBIO), Universidade de Vigo , 36310 Vigo, Spain
| | - Verónica Montes-García
- Departamento de Química Física and Biomedical Research Center (CINBIO), Universidade de Vigo , 36310 Vigo, Spain
| | - Celina Costas
- Departamento de Química Física and Biomedical Research Center (CINBIO), Universidade de Vigo , 36310 Vigo, Spain
| | - Ignacio Pérez-Juste
- Departamento de Química Física and Biomedical Research Center (CINBIO), Universidade de Vigo , 36310 Vigo, Spain
| | - Jorge Pérez-Juste
- Departamento de Química Física and Biomedical Research Center (CINBIO), Universidade de Vigo , 36310 Vigo, Spain
| | - Isabel Pastoriza-Santos
- Departamento de Química Física and Biomedical Research Center (CINBIO), Universidade de Vigo , 36310 Vigo, Spain
| | - Luis M Liz-Marzán
- Departamento de Química Física and Biomedical Research Center (CINBIO), Universidade de Vigo , 36310 Vigo, Spain
- Bionanoplasmonics Laboratory, CIC biomaGUNE , Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science , 48013 Bilbao, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN) , 20014 Donostia-San Sebastián, Spain
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61
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Soni V, Khake SM, Punji B. Nickel-Catalyzed C(sp2)–H/C(sp3)–H Oxidative Coupling of Indoles with Toluene Derivatives. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01044] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Vineeta Soni
- Organometallic Synthesis
and Catalysis Group, Chemical Engineering Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, Maharashtra, India
| | - Shrikant M. Khake
- Organometallic Synthesis
and Catalysis Group, Chemical Engineering Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, Maharashtra, India
| | - Benudhar Punji
- Organometallic Synthesis
and Catalysis Group, Chemical Engineering Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, Maharashtra, India
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62
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Disarming the enemy: targeting bacterial toxins with small molecules. Emerg Top Life Sci 2017; 1:31-39. [PMID: 33525814 DOI: 10.1042/etls20160013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 03/01/2017] [Accepted: 03/03/2017] [Indexed: 12/17/2022]
Abstract
The rapid emergence of antibiotic-resistant bacterial strains has prompted efforts to find new and more efficacious treatment strategies. Targeting virulence factors produced by pathogenic bacteria has gained particular attention in the last few years. One of the inherent advantages of this approach is that it provides less selective pressure for the development of resistance mechanisms. In addition, antivirulence drugs could potentially be the answer for diseases in which the use of conventional antibiotics is counterproductive. That is the case for bacterial toxin-mediated diseases, in which the severity of the symptoms is a consequence of the exotoxins produced by the pathogen. Examples of these are haemolytic-uraemic syndrome produced by Shiga toxins, the profuse and dangerous dehydration caused by Cholera toxin or the life-threatening colitis occasioned by clostridial toxins. This review focuses on the recent advances on the development of small molecules with antitoxin activity against Enterohaemorrhagic Escherichia coli, Vibrio cholerae and Clostridium difficile given their epidemiological importance. The present work includes studies of small molecules with antitoxin properties that act directly on the toxin (direct inhibitors) or that act by preventing expression of the toxin (indirect inhibitors).
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63
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Yang Q, Pande GSJ, Wang Z, Lin B, Rubin RA, Vora GJ, Defoirdt T. Indole signalling and (micro)algal auxins decrease the virulence of Vibrio campbellii, a major pathogen of aquatic organisms. Environ Microbiol 2017; 19:1987-2004. [PMID: 28251783 DOI: 10.1111/1462-2920.13714] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 02/25/2017] [Indexed: 12/23/2022]
Abstract
Vibrios belonging to the Harveyi clade are major pathogens of marine vertebrates and invertebrates, causing major losses in wild and cultured organisms. Despite their significant impact, the pathogenicity mechanisms of these bacteria are not yet completely understood. In this study, the impact of indole signalling on the virulence of Vibrio campbellii was investigated. Elevated indole levels significantly decreased motility, biofilm formation, exopolysaccharide production and virulence to crustacean hosts. Indole furthermore inhibited the three-channel quorum sensing system of V. campbellii, a regulatory mechanism that is required for full virulence of the pathogen. Further, indole signalling was found to interact with the stress sigma factor RpoS. Together with the observations that energy-consuming processes (motility and bioluminescence) are downregulated, and microarray-based transcriptomics demonstrating that indole decreases the expression of genes involved in energy and amino acid metabolism, the data suggest that indole is a starvation signal in V. campbellii. Finally, it was found that the auxins indole-3-acetic acid and indole-3-acetamide, which were produced by various (micro)algae sharing the aquatic environment with V. campbellii, have a similar effect as observed for indole. Auxins might, therefore, have a significant impact on the interactions between vibrios, (micro)algae and higher organisms, with major ecological and practical implications.
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Affiliation(s)
- Qian Yang
- Laboratory of Aquaculture & Artemia Reference Center, Ghent University, Gent, Belgium
| | | | - Zheng Wang
- Center for Bio/Molecular Science & Engineering, Naval Research Laboratory, Washington, DC, USA
| | - Baochuan Lin
- Center for Bio/Molecular Science & Engineering, Naval Research Laboratory, Washington, DC, USA
| | - Robert A Rubin
- Mathematics Department, Whittier College, Whittier, CA, USA
| | - Gary J Vora
- Center for Bio/Molecular Science & Engineering, Naval Research Laboratory, Washington, DC, USA
| | - Tom Defoirdt
- Laboratory of Aquaculture & Artemia Reference Center, Ghent University, Gent, Belgium.,Center for Microbial Ecology and Technology (cmet), Ghent University, Gent, Belgium
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64
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Zhang B, Zhang X, Hao J, Yang C. Direct Approach to N-Substituted-2-Fluoroindoles by Sequential Construction of C–N Bonds from gem-Difluorostyrenes. Org Lett 2017; 19:1780-1783. [PMID: 28332836 DOI: 10.1021/acs.orglett.7b00549] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Bin Zhang
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, Shangda Road 99, Shanghai 200436, China
| | - Xiaofei Zhang
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
| | - Jian Hao
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, Shangda Road 99, Shanghai 200436, China
| | - Chunhao Yang
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
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65
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Biswas NN, Yu TT, Kimyon Ö, Nizalapur S, Gardner CR, Manefield M, Griffith R, Black DS, Kumar N. Synthesis of antimicrobial glucosamides as bacterial quorum sensing mechanism inhibitors. Bioorg Med Chem 2017; 25:1183-1194. [DOI: 10.1016/j.bmc.2016.12.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 12/12/2016] [Accepted: 12/19/2016] [Indexed: 10/25/2022]
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66
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Khake SM, Soni V, Gonnade RG, Punji B. A General Nickel-Catalyzed Method for C−H Bond Alkynylation of Heteroarenes Through Chelation Assistance. Chemistry 2017; 23:2907-2914. [DOI: 10.1002/chem.201605306] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Indexed: 01/12/2023]
Affiliation(s)
- Shrikant M. Khake
- Organometallic Synthesis and Catalysis Group; Chemical Engineering Division; CSIR-National Chemical Laboratory (CSIR-NCL); Dr. Homi Bhabha Road Pune 411 008 Maharastra India
| | - Vineeta Soni
- Organometallic Synthesis and Catalysis Group; Chemical Engineering Division; CSIR-National Chemical Laboratory (CSIR-NCL); Dr. Homi Bhabha Road Pune 411 008 Maharastra India
| | - Rajesh G. Gonnade
- Centre for Material Characterization; CSIR-National Chemical Laboratory (CSIR-NCL); Dr. Homi Bhabha Road Pune 411 008 Maharastra India
| | - Benudhar Punji
- Organometallic Synthesis and Catalysis Group; Chemical Engineering Division; CSIR-National Chemical Laboratory (CSIR-NCL); Dr. Homi Bhabha Road Pune 411 008 Maharastra India
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67
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Mazzeo G, Longhi G, Abbate S, Palomba M, Bagnoli L, Marini F, Santi C, Han J, Soloshonok VA, Di Crescenzo E, Ruzziconi R. Solvent-free, uncatalyzed asymmetric “ene” reactions of N-tert-butylsulfinyl-3,3,3-trifluoroacetaldimines: a general approach to enantiomerically pure α-(trifluoromethyl)tryptamines. Org Biomol Chem 2017; 15:3930-3937. [PMID: 28436530 DOI: 10.1039/c7ob00670e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A novel approach to stereoselectively α-trifluoromethylated tryptamines is reported.
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Affiliation(s)
- Giuseppe Mazzeo
- Department of Molecular and Translational Medicine
- Università di Brescia
- 25123 Brescia
- Italy
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine
- Università di Brescia
- 25123 Brescia
- Italy
| | - Sergio Abbate
- Department of Molecular and Translational Medicine
- Università di Brescia
- 25123 Brescia
- Italy
| | - Martina Palomba
- Department of Pharmaceutical Sciences
- University of Perugia Via del Liceo 1
- 06123 Perugia
- Italy
| | - Luana Bagnoli
- Department of Pharmaceutical Sciences
- University of Perugia Via del Liceo 1
- 06123 Perugia
- Italy
| | - Francesca Marini
- Department of Pharmaceutical Sciences
- University of Perugia Via del Liceo 1
- 06123 Perugia
- Italy
| | - Claudio Santi
- Department of Pharmaceutical Sciences
- University of Perugia Via del Liceo 1
- 06123 Perugia
- Italy
| | - Jianlin Han
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Coordination Chemistry
- Nanjing University
- Nanjing
- P. R. China
| | - Vadim A. Soloshonok
- Department of Organic Chemistry I
- Faculty of Chemistry
- University of the Basque Country UPV/EHU
- 20018 San Sebastián
- Spain
| | | | - Renzo Ruzziconi
- Department of Chemistry
- Biology and Biotechnologies
- 06123 Perugia
- Italy
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68
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Rajalaxmi M, Amsa Devi V, Pandian SK. In vitro evaluation of indole-3-carboxaldehyde on Vibrio parahaemolyticus biofilms. Biologia (Bratisl) 2016. [DOI: 10.1515/biolog-2016-0043] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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69
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Kikuchi M, Ueno M, Itoh Y, Suda W, Hattori M. Uremic Toxin-Producing Gut Microbiota in Rats with Chronic Kidney Disease. Nephron Clin Pract 2016; 135:51-60. [PMID: 27701177 DOI: 10.1159/000450619] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 08/31/2016] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND In patients with chronic kidney disease (CKD), many metabolites of gut microbiota retain in the body as uremic toxins (UTs). However, the kinds of bacteria producing UTs are rarely discussed. METHODS We analyzed UT production and the composition of gut microbiota in CKD rats and cecectomized rats. AST-120, a spherical carbon adsorbent, was administrated to evaluate how the precursors of UT affect gut microbiota. Serum and urine levels of UTs were quantified by liquid chromatography/electrospray ionization-tandem mass spectrometry. Gut microbiota were analyzed using 454-pyrosequencing of the 16S rRNA gene. Operational taxonomic unit (OTU) clustering and UniFrac analysis were performed to compare gut microbiota among the groups. RESULTS Serum and urine levels of indoxyl sulfate and phenyl sulfate were higher in CKD versus control rats (p < 0.05). AST-120 administration decreased UT production (p < 0.01) and changed overall gut microbiota composition in CKD rats. UT urinary excretion and gut microbiota composition changed in cecectomized rats, with the relative abundance of Clostridia- and Bacteroidia-affiliated species being significantly reduced (p < 0.01). We identified candidate indole- and phenol-producing intestinal microbiota, 3 Clostridia, and 2 Bacteroidia. These OTUs have a tryptophanase/tyrosine phenol-lyase gene in the closest sequenced genome out of the OTUs declined following cecectomy. CONCLUSION Our data suggest that UT production is correlated with a subset of indigenous gut microbiota. However, UT may be induced by other non-symbiotic microbiota that are influenced by factors other than microbiota populations. The relationship between specific microbiota and UTs in patients requires further clarification.
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Affiliation(s)
- Mami Kikuchi
- Department of Computational Biology, Graduate School of Frontier Sciences, The University of Tokyo, Chiba, Tokyo, Japan
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70
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Indole-3-acetic acid in plant-pathogen interactions: a key molecule for in planta bacterial virulence and fitness. Res Microbiol 2016; 167:774-787. [PMID: 27637152 DOI: 10.1016/j.resmic.2016.09.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 07/06/2016] [Accepted: 09/01/2016] [Indexed: 11/22/2022]
Abstract
The plant pathogenic bacterium Pseudomonas savastanoi, the causal agent of olive and oleander knot disease, uses the so-called "indole-3-acetamide pathway" to convert tryptophan to indole-3-acetic acid (IAA) via a two-step pathway catalyzed by enzymes encoded by the genes in the iaaM/iaaH operon. Moreover, pathovar nerii of P. savastanoi is able to conjugate IAA to lysine to generate the less biologically active compound IAA-Lys via the enzyme IAA-lysine synthase encoded by the iaaL gene. Interestingly, iaaL is now known to be widespread in many Pseudomonas syringae pathovars, even in the absence of the iaaM and iaaH genes for IAA biosynthesis. Here, two knockout mutants, ΔiaaL and ΔiaaM, of strain Psn23 of P. savastanoi pv. nerii were produced. Pathogenicity tests using the host plant Nerium oleander showed that ΔiaaL and ΔiaaM were hypervirulent and hypovirulent, respectively and these features appeared to be related to their differential production of free IAA. Using the Phenotype Microarray approach, the chemical sensitivity of these mutants was shown to be comparable to that of wild-type Psn23. The main exception was 8 hydroxyquinoline, a toxic compound that is naturally present in plant exudates and is used as a biocide, which severely impaired the growth of ΔiaaL and ΔiaaM, as well as growth of the non-pathogenic mutant ΔhrpA, which lacks a functional Type Three Secretion System (TTSS). According to bioinformatics analysis of the Psn23 genome, a gene encoding a putative Multidrug and Toxic compound Extrusion (MATE) transporter, was found upstream of iaaL. Similarly to iaaL and iaaM, its expression appeared to be TTSS-dependent. Moreover, auxin-responsive elements were identified for the first time in the modular promoters of both the iaaL gene and the iaaM/iaaH operon of P. savastanoi, suggesting their IAA-inducible transcription. Gene expression analysis of several genes related to TTSS, IAA metabolism and drug resistance confirmed the presence of a concerted regulatory network in this phytopathogen among virulence, fitness and drug efflux.
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71
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Huang K, Ma Q, Shen X, Gong L, Meggers E. Metal-Templated Asymmetric Catalysis: (Z)-1-Bromo-1-Nitrostyrenes as Versatile Substrates for Friedel-Crafts Alkylation of Indoles. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600288] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Kaifang Huang
- Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 People's Republic of China) address
| | - Qiao Ma
- Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 People's Republic of China) address
| | - Xiang Shen
- Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 People's Republic of China) address
| | - Lei Gong
- Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 People's Republic of China) address
| | - Eric Meggers
- Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 People's Republic of China) address
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35043 Marburg Germany
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72
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Chen J, Tao LX, Xiao W, Ji SS, Wang JR, Li XW, Zhang HY, Guo YW. Design, synthesis and biological evaluation of novel chiral oxazino-indoles as potential and selective neuroprotective agents against Aβ25–35-induced neuronal damage. Bioorg Med Chem Lett 2016; 26:3765-9. [DOI: 10.1016/j.bmcl.2016.05.061] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 05/09/2016] [Accepted: 05/21/2016] [Indexed: 12/21/2022]
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73
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Soni V, Jagtap RA, Gonnade RG, Punji B. Unified Strategy for Nickel-Catalyzed C-2 Alkylation of Indoles through Chelation Assistance. ACS Catal 2016. [DOI: 10.1021/acscatal.6b02003] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Vineeta Soni
- Organometallic Synthesis and Catalysis
Group, Chemical Engineering
Division, and ‡Centre for Material Characterization, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411 008, Maharashtra, India
| | - Rahul A. Jagtap
- Organometallic Synthesis and Catalysis
Group, Chemical Engineering
Division, and ‡Centre for Material Characterization, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411 008, Maharashtra, India
| | - Rajesh G. Gonnade
- Organometallic Synthesis and Catalysis
Group, Chemical Engineering
Division, and ‡Centre for Material Characterization, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411 008, Maharashtra, India
| | - Benudhar Punji
- Organometallic Synthesis and Catalysis
Group, Chemical Engineering
Division, and ‡Centre for Material Characterization, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411 008, Maharashtra, India
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74
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Noland WE, Vijay Kumar H, Lu C, Brown CD, Wiley-Schaber E, Johansson A, LaBelle EV, O’Brian NC, Jensen RC, Tritch KJ. N′-Acylation of (3,2′)-indole dimers. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.03.107] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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75
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Makarov AS, Merkushev AA, Uchuskin MG, Trushkov IV. Oxidative Furan-to-Indole Rearrangement. Synthesis of 2-(2-Acylvinyl)indoles and Flinderole C Analogues. Org Lett 2016; 18:2192-5. [PMID: 27074535 DOI: 10.1021/acs.orglett.6b00805] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Oxidative rearrangement of 2-(2-aminobenzyl)furans affording 2-(2-acylvinyl)indoles in a stereocontrolled manner in good-to-excellent yields has been developed. Thus, (2-aminobenzyl)furans with electron-releasing alkoxy substituents in the phenyl group form only E-isomers of 2-(2-acylvinyl)indoles. Conversely, substrates without such substituents produce target products as Z-isomers exclusively. A short diastereoselective method for the transformation of the obtained 2-(2-acylvinyl)indoles into antimalarial bisindole alkaloid flinderole A-C analogues has been developed.
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Affiliation(s)
- Anton S Makarov
- Department of Chemistry, Perm State University , Bukireva st. 15, Perm 614990, Russia
| | - Anton A Merkushev
- Department of Chemistry, Perm State University , Bukireva st. 15, Perm 614990, Russia.,Institute of Technical Chemistry UrB RAS, Academika Koroleva st. 3, Perm 614013, Russia
| | - Maxim G Uchuskin
- Department of Chemistry, Perm State University , Bukireva st. 15, Perm 614990, Russia
| | - Igor V Trushkov
- Department of Chemistry, M.V. Lomonosov Moscow State University , Leninskie gory 1-3, Moscow 119991, Russia.,Laboratory of Chemical Synthesis, Federal Research Center of Pediatric Hematology, Oncology and Immunology , Samory Mashela 1, Moscow 117997, Russia
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76
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Rajalaxmi M, Beema Shafreen R, Iyer PM, Sahaya Vino R, Balamurugan K, Pandian SK. An in silico, in vitro and in vivo investigation of indole-3-carboxaldehyde identified from the seawater bacterium Marinomonas sp. as an anti-biofilm agent against Vibrio cholerae O1. BIOFOULING 2016; 32:1-12. [PMID: 26939983 DOI: 10.1080/08927014.2016.1154545] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Biofilm formation is a major contributing factor in the pathogenesis of Vibrio cholerae O1 (VCO1) and therefore preventing biofilm formation could be an effective alternative strategy for controlling cholera. The present study was designed to explore seawater bacteria as a source of anti-biofilm agents against VCO1. Indole-3-carboxaldehyde (I3C) was identified as an active principle component in Marinomonas sp., which efficiently inhibited biofilm formation by VCO1 without any selection pressure. Furthermore, I3C applications also resulted in considerable collapsing of preformed pellicles. Real-time PCR studies revealed the down-regulation of virulence gene expression by modulation of the quorum-sensing pathway and enhancement of protease production, which was further confirmed by phenotypic assays. Furthermore, I3C increased the survival rate of Caenorhabditis elegans when infected with VCO1 by significantly reducing in vivo biofilm formation, which was corroborated by a survivability assay. Thus, this study revealed, for the first time, the potential of I3C as an anti-biofilm agent against VCO1.
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Affiliation(s)
- Murugan Rajalaxmi
- a Department of Biotechnology Science Campus , Alagappa University , Karaikudi , India
| | | | - Prasanth M Iyer
- a Department of Biotechnology Science Campus , Alagappa University , Karaikudi , India
| | - Raja Sahaya Vino
- a Department of Biotechnology Science Campus , Alagappa University , Karaikudi , India
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77
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Lee JH, Wood TK, Lee J. Roles of Indole as an Interspecies and Interkingdom Signaling Molecule. Trends Microbiol 2015; 23:707-718. [DOI: 10.1016/j.tim.2015.08.001] [Citation(s) in RCA: 238] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 07/22/2015] [Accepted: 08/05/2015] [Indexed: 02/08/2023]
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78
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Delago A, Mandabi A, Meijler MM. Natural Quorum Sensing Inhibitors - Small Molecules, Big Messages. Isr J Chem 2015. [DOI: 10.1002/ijch.201500052] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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79
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80
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Christmann M, Hu J, Kitamura M, Stoltz B. Tetrahedron reports on organic chemistry. Tetrahedron 2015. [DOI: 10.1016/s0040-4020(15)00744-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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81
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Kothandapani J, Ganesan A, Vairaprakash P, Ganesan SS. Copper(II) chloride assisted aryl exchange in arylmethanes: a simple and efficient route to triarylmethane derivatives. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.054] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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82
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Ganesan A, Kothandapani J, Nanubolu JB, Ganesan SS. Oleic acid: a benign Brønsted acidic catalyst for densely substituted indole derivative synthesis. RSC Adv 2015. [DOI: 10.1039/c5ra02906f] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Oleic acid was identified to catalyse bis(indolyl)methane and densely functionalized 4H-chromene, spirooxindole and spiro[indoline-3,4′-pyrano[2,3-c]pyrazole] derivative synthesis in good to excellent yields.
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Affiliation(s)
- Asaithampi Ganesan
- Department of Chemistry
- School of Chemical and Biotechnology
- SASTRA University
- Thanjavur-613401
- India
| | | | - Jagadeesh Babu Nanubolu
- Room No 150
- Centre for X-ray Crystallography
- Indian Institute of Chemical Technology
- Hyderabad- 500607
- India
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83
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Guo M, Zheng Y, Terell JL, Ad M, Opoku-Temeng C, Bentley WE, Sintim HO. Geminal dihalogen isosteric replacement in hydrated AI-2 affords potent quorum sensing modulators. Chem Commun (Camb) 2015; 51:2617-20. [DOI: 10.1039/c4cc09361e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Geminal dibromo moiety can replace hydrated carbonyl groups in AI-2, a quorum sensing autoinducer, without diminution of activity. This group can form halogen bond with active site electron donor.
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Affiliation(s)
- Min Guo
- Department of Chemistry and Biochemistry
- University of Maryland College Park
- USA
| | - Yue Zheng
- Department of Chemistry and Biochemistry
- University of Maryland College Park
- USA
| | - Jessica L. Terell
- Fischell Department of Bioengineering
- University of Maryland
- College Park
- USA
| | - Michal Ad
- Department of Chemistry and Biochemistry
- University of Maryland College Park
- USA
| | | | - William E. Bentley
- Fischell Department of Bioengineering
- University of Maryland
- College Park
- USA
| | - Herman O. Sintim
- Department of Chemistry and Biochemistry
- University of Maryland College Park
- USA
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84
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85
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Biswas NN, Kutty SK, Barraud N, Iskander GM, Griffith R, Rice SA, Willcox M, Black DS, Kumar N. Indole-based novel small molecules for the modulation of bacterial signalling pathways. Org Biomol Chem 2015; 13:925-37. [DOI: 10.1039/c4ob02096k] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Indole basedN-acylatedl-homoserine lactone (AHL) mimics were developed as quorum sensing (QS) inhibitors for Gram-negative bacteriaPseudomonas aeruginosaand can be used as novel antimicrobial agents.
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Affiliation(s)
| | | | - Nicolas Barraud
- Centre for Marine Bio-Innovation
- School of Biotechnology and Biomolecular Sciences
- UNSW Australia
- Sydney
- Australia
| | | | | | - Scott A. Rice
- Centre for Marine Bio-Innovation
- School of Biotechnology and Biomolecular Sciences
- UNSW Australia
- Sydney
- Australia
| | - Mark Willcox
- School of Optometry and Vision Science
- UNSW Australia
- Sydney
- Australia
| | | | - Naresh Kumar
- School of Chemistry
- UNSW Australia
- Sydney
- Australia
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86
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Rotta-Loria NL, Borzenko A, Alsabeh PG, Lavery CB, Stradiotto M. Utilizing Mor-DalPhos/Palladium-Catalyzed Monoarylation in the Multicomponent One-Pot Synthesis of Indoles. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400903] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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