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Ding L, Zhang SD, Haidar AK, Bajimaya M, Guo Y, Larsen TO, Gram L. Polycyclic Tetramate Macrolactams-A Group of Natural Bioactive Metallophores. Front Chem 2021; 9:772858. [PMID: 34869220 PMCID: PMC8632820 DOI: 10.3389/fchem.2021.772858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 10/25/2021] [Indexed: 12/22/2022] Open
Abstract
New infectious diseases and increase in drug-resistant microbial pathogens emphasize the need for antibiotics with novel mode-of-action. Tetramates represented by fungi-derived tenuazonic acid and bacterial polycyclic tetramate macrolactams (PTMs) are an important family of natural products with a broad spectrum of antimicrobial activities. Despite their potential application as new antibiotics, it remains unknown how PTMs function. In this study, genomic mining revealed that PTM biosynthetic gene clusters (BGCs) are widespread in both Gram-positive and Gram-negative bacteria, and we investigated a sponge endosymbiont Actinoalloteichus hymeniacidonis harboring a potential PTM-BGC. Xanthobaccin A that previously has only been isolated from a Gram-negative bacterium was obtained after a scale-up fermentation, isolation, and structure elucidation through mass spectrometry and nuclear magnetic resonance (NMR) spectroscopy. Xanthobaccin A as well as two previously reported tetramates, equisetin and ikarugamycin, exhibited antibacterial activities against Bacillus subtilis. In addition, these three tetramates were for the first time to be confirmed as metallophores and the stoichiometry of the complexes were shown to be Fe(III)(equisetin)3/Fe(III)(equisetin)2 and Fe(III)(ikarugamycin)2, respectively. Meanwhile, we found that all three tetramates could reduce ferric into ferrous iron, which triggers the Fenton chemistry reaction. Their antibacterial activity was reduced by adding the radical scavenger, vitamin C. Altogether, our work demonstrates that equisetin and PTMs can act as metallophores and their antimicrobial mechanism is possibly mediated through Fenton chemistry.
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Affiliation(s)
- Ling Ding
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Sheng-Da Zhang
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Ahmad Kasem Haidar
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Manila Bajimaya
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Yaojie Guo
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Thomas Ostenfeld Larsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Lone Gram
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
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Mizota I, Maeda M, Imoto K, Shimizu M. Synthesis of Tetramic Acid Derivatives via a Tandem Umpolung Alkylation/Reduction/Cyclization Reaction of γ-Hydrazono β-Ketoester. Org Lett 2020; 22:3079-3083. [PMID: 32227901 DOI: 10.1021/acs.orglett.0c00824] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient method for the one-pot synthesis of tetramic acid derivatives was developed utilizing tandem umpolung N-alkylation/reduction/cyclization of γ-hydrazono β-ketoester. By using this reaction as a key step, the total synthesis of the 3-spiro 7-hydroxamic acid tetralin which possesses an HDAC inhibitory activity was also achieved.
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Affiliation(s)
- Isao Mizota
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Miki Maeda
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Kiho Imoto
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Makoto Shimizu
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan.,School of Energy Science and Engineering College, Nanjing Tech University, Nanjing 211816, Jiangsu Province, China
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Unstable Tetramic Acid Derivatives from the Deep-Sea-Derived Fungus Cladosporium sphaerospermum EIODSF 008. Mar Drugs 2018; 16:md16110448. [PMID: 30445739 PMCID: PMC6266709 DOI: 10.3390/md16110448] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 11/07/2018] [Accepted: 11/12/2018] [Indexed: 01/15/2023] Open
Abstract
Seven new unstable tetramic acid derivatives, cladosporiumins I-O (1–7), together with the known analogue cladodionen (8) were isolated from the extract of the deep-sea-derived fungus Cladosporium sphaerospermum EIODSF 008. Their structures were elucidated by spectroscopic analysis, quantum chemical calculations and ECD spectra. Compound 4 was a Mg complex of tetramic acid derivative. In acidic solvent, 4 could change to 1 and 6, and 7 could change to 5. In addition, 1, 5 and 8 existed as two exchangeable isomers, respectively. The structures of cladosporiumins E-H were reassigned as their Na complexes. The antibacterial and cytotoxic activities of 1–8 were also evaluated. However, because of their instability, all of the isolated compounds did not show significant antibacterial activity as the preliminary EtOAc extracts of the fungal strain.
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Masschelein J, Jenner M, Challis GL. Antibiotics from Gram-negative bacteria: a comprehensive overview and selected biosynthetic highlights. Nat Prod Rep 2017. [PMID: 28650032 DOI: 10.1039/c7np00010c] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Covering: up to 2017The overwhelming majority of antibiotics in clinical use originate from Gram-positive Actinobacteria. In recent years, however, Gram-negative bacteria have become increasingly recognised as a rich yet underexplored source of novel antimicrobials, with the potential to combat the looming health threat posed by antibiotic resistance. In this article, we have compiled a comprehensive list of natural products with antimicrobial activity from Gram-negative bacteria, including information on their biosynthetic origin(s) and molecular target(s), where known. We also provide a detailed discussion of several unusual pathways for antibiotic biosynthesis in Gram-negative bacteria, serving to highlight the exceptional biocatalytic repertoire of this group of microorganisms.
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Affiliation(s)
- J Masschelein
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, UK.
| | - M Jenner
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, UK.
| | - G L Challis
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, UK.
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X-Ray Crystallographic Analysis, EPR Studies, and Computational Calculations of a Cu(II) Tetramic Acid Complex. Bioinorg Chem Appl 2017; 2017:7895023. [PMID: 28316540 PMCID: PMC5337788 DOI: 10.1155/2017/7895023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 11/20/2016] [Accepted: 12/25/2016] [Indexed: 11/26/2022] Open
Abstract
In this work we present a structural and spectroscopic analysis of a copper(II) N-acetyl-5-arylidene tetramic acid by using both experimental and computational techniques. The crystal structure of the Cu(II) complex was determined by single crystal X-ray diffraction and shows that the copper ion lies on a centre of symmetry, with each ligand ion coordinated to two copper ions, forming a 2D sheet. Moreover, the EPR spectroscopic properties of the Cu(II) tetramic acid complex were also explored and discussed. Finally, a computational approach was performed in order to obtain a detailed and precise insight of product structures and properties. It is hoped that this study can enrich the field of functional supramolecular systems, giving place to the formation of coordination-driven self-assembly architectures.
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Zaghouani M, Nay B. 3-Acylated tetramic and tetronic acids as natural metal binders: myth or reality? Nat Prod Rep 2016; 33:540-8. [PMID: 26879987 DOI: 10.1039/c5np00144g] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covering: up to 20153-Acylated tetramic and tetronic acids are characterized by a low pKa and are likely to be deprotonated under physiological conditions. In addition, their structure makes them excellent chelators of metallic cations. We will discuss the significance of these chemical properties with regard to the biological properties and mechanisms of action of these compounds, highlighting the importance of considering them as salts or chelates for biological purposes, rather than acids.
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Affiliation(s)
- Mehdi Zaghouani
- Muséum National d'Histoire Naturelle, CNRS, UMR 7245 Molécules de Communication et Adaptation des Micro-organismes, 57 rue Cuvier (CP 54), 75005 Paris, France.
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N-Acetyl-5-arylidenetetramic acids: synthesis, X-ray structure elucidation and application to the preparation of zinc(II) and copper(II) complexes. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.02.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Still PC, Johnson TA, Theodore CM, Loveridge ST, Crews P. Scrutinizing the scaffolds of marine biosynthetics from different source organisms: Gram-negative cultured bacterial products enter center stage. JOURNAL OF NATURAL PRODUCTS 2014; 77:690-702. [PMID: 24571234 PMCID: PMC4095796 DOI: 10.1021/np500041x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Compounds from macro marine organisms are presumed to owe their biosynthetic origins to associated microbial symbionts, although few definitive examples exist. An upsurge in the recent literature from 2012 to 2013 has shown that four compounds previously reported from macro marine organisms are in fact biosynthesized by non-photosynthetic Gram-negative bacteria (NPGNB). Structural parallels between compounds isolated from macro marine organisms and NPGNB producers form the basis of this review. Although less attention has been given to investigating the chemistry of NPGNB sources, there exists a significant list of structural parallels between NPGNB and macro marine organism-derived compounds. Alternatively, of the thousands of compounds isolated from Gram-positive actinomycetes, few structural parallels with macro marine organisms are known. A summary of small molecules isolated from marine NPGNB sources is presented, including compounds isolated from marine myxobacteria. From this assemblage of structural parallels and diverse chemical structures, it is hypothesized that the potential for the discovery of inspirational molecules from NPGNB sources is vast and that the recent spike in the literature of macro marine compounds owing their biosynthetic origin to NPGNB producers represents a turning point in the field.
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Affiliation(s)
- Patrick C. Still
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95060, United States
| | - Tyler A. Johnson
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95060, United States
| | - Christine M. Theodore
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95060, United States
| | - Steven T. Loveridge
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95060, United States
| | - Phillip Crews
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95060, United States
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Harras M, Bauer T, Kempe R, Schobert R. Selective O-methylations of 3-[(triphenylphosphoranylidene)acetyl]tetronic and -tetramic acids. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Mansson M, Gram L, Larsen TO. Production of bioactive secondary metabolites by marine vibrionaceae. Mar Drugs 2011; 9:1440-1468. [PMID: 22131950 PMCID: PMC3225927 DOI: 10.3390/md9091440] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Revised: 08/11/2011] [Accepted: 08/15/2011] [Indexed: 11/25/2022] Open
Abstract
Bacteria belonging to the Vibrionaceae family are widespread in the marine environment. Today, 128 species of vibrios are known. Several of them are infamous for their pathogenicity or symbiotic relationships. Despite their ability to interact with eukaryotes, the vibrios are greatly underexplored for their ability to produce bioactive secondary metabolites and studies have been limited to only a few species. Most of the compounds isolated from vibrios so far are non-ribosomal peptides or hybrids thereof, with examples of N-containing compounds produced independent of nonribosomal peptide synthetases (NRPS). Though covering a limited chemical space, vibrios produce compounds with attractive biological activities, including antibacterial, anticancer, and antivirulence activities. This review highlights some of the most interesting structures from this group of bacteria. Many compounds found in vibrios have also been isolated from other distantly related bacteria. This cosmopolitan occurrence of metabolites indicates a high incidence of horizontal gene transfer, which raises interesting questions concerning the ecological function of some of these molecules. This account underlines the pending potential for exploring new bacterial sources of bioactive compounds and the challenges related to their investigation.
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Affiliation(s)
- Maria Mansson
- Center from Microbial Biotechnology, Department of Systems Biology, Technical University of Denmark, Søltofts Plads 221, DK-2800 Kgs. Lyngby, Denmark; E-Mail:
| | - Lone Gram
- National Food Institute, Technical University of Denmark, Søltofts Plads 221, DK-2800 Kgs. Lyngby, Denmark; E-Mail:
| | - Thomas O. Larsen
- Center from Microbial Biotechnology, Department of Systems Biology, Technical University of Denmark, Søltofts Plads 221, DK-2800 Kgs. Lyngby, Denmark; E-Mail:
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Schlenk A, Diestel R, Sasse F, Schobert R. A Selective 3-Acylation of Tetramic Acids and the First Synthesis of Ravenic Acid. Chemistry 2010; 16:2599-604. [DOI: 10.1002/chem.200902544] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Gibson CL, Kennedy AR, Morthala RR, Parkinson JA, Suckling CJ. Tetramic acid and imidazolidinone syntheses via unexpected base induced cyclisations of alanine derived Weinreb amides. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.05.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ramana C, Mondal MA, Puranik VG, Gurjar MK. Synthetic studies toward macrocidins: an RCM approach for the construction of the central cyclic core. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.03.192] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Schobert R, Jagusch C. An expedient synthesis of 3-acyltetramic acids of the melophlin family from α-aminoesters and immobilized Ph3PCCO. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.01.036] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Schobert R, Jagusch C, Melanophy C, Mullen G. Synthesis and reactions of polymer-bound Ph3PCCO: a quick route to tenuazonic acid and other optically pure 5-substituted tetramates. Org Biomol Chem 2004; 2:3524-9. [PMID: 15565247 DOI: 10.1039/b412779j] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polystyrene-bound cumulated ylide Ph3PCCO was prepared on a large scale in two steps. It reacts with Grignard compounds, amines and alcohols to give immobilized acyl, amide and ester ylides, respectively. Their Wittig reactions lead to alkenes free of phosphane oxide. Optically pure 5-substituted tetramates were obtained from reactions of resin-bound Ph3PCCO with alpha-ammonium esters in one step. The mycotoxin (-)-tenuazonic acid was accordingly prepared in just three steps.
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Affiliation(s)
- Rainer Schobert
- Organic Chemistry Laboratory, University of Bayreuth, D-95440, Bayreuth, Germany.
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Athanasellis G, Gavrielatos E, Igglessi-Markopoulou O, Markopoulos J. Novel ‘quinolone’ metal complexes: Synthesis and spectroscopic studies of mg(II), zn(II) and ba(II) complexes with N-methyl (or NH)-3-acetyl-4-hydroxy quinolin-2-one ligands. J Heterocycl Chem 2003. [DOI: 10.1002/jhet.5570400413] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Gavrielatos E, Athanasellis G, Igglessi-Markopoulou O, Markopoulos J. Cationic diamineplatinum(II) complexes containing the enolate of N,3-acetyl-4-hydroxypyrrolin-2-one. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(02)01317-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Schmidt A. Heterocyclic Mesomeric Betaines and Analogs in Natural Product Chemistry. Betainic Alkaloids and Nucleobases. ADVANCES IN HETEROCYCLIC CHEMISTRY VOLUME 85 2003. [DOI: 10.1016/s0065-2725(03)85002-x] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Athanasellis G, Gavrielatos E, Igglessi-Markopoulou O. Synthesis and spectroscopic studies of 5-arylidene-3-substituted tetramic acids as possible substrates for catalytic asymmetric hydrogenation. J Heterocycl Chem 2001. [DOI: 10.1002/jhet.5570380527] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Petroliagi M, Igglessi-Maikopoulou O, Markopoulos J. Complexation and Spectroscopic Studies of 5-Benzylidene-3-hexanoyl tetramic acid with Magnesium (II), Zinc(II) and Barium (II) ions. HETEROCYCL COMMUN 2000. [DOI: 10.1515/hc.2000.6.2.157] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Friedrichsen W, Traulsen T, Elguero J, Katritzky AR. Tautomerism of Heterocycles: Five-Membered Rings with One Heteroatom. ADVANCES IN HETEROCYCLIC CHEMISTRY 2000. [DOI: 10.1016/s0065-2725(00)76004-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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Nishino H, Alam Chowdhury F, Kurosawa K. Simple Route to Azabicyclic Peroxides from Tetramic Acid Derivatives Using Manganese(III)-based Molecular Oxygen Trapping Reaction. HETEROCYCLES 1999. [DOI: 10.3987/com-98-8417] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Heaton BT, Jacob C, Markopoulos J, Markopoulou O, Nähring J, Skylaris CK, Smith AK. Rhodium(I) complexes containing the enolate of N-acetyl-3-butanoyltetramic acid (Habta) and the crystal structure of [Rh(abta){P(OPh)3}2]. ACTA ACUST UNITED AC 1996. [DOI: 10.1039/dt9960001701] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Markopoulou O, Markopoulos J, Nicholls D. Synthesis of 3-butanoyl- and 3-benzoyl-4-hydroxy-3-pyrrolin-2-ones and their complexes with metal ions. J Inorg Biochem 1990. [DOI: 10.1016/0162-0134(90)80029-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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