1
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Hayakawa I, Isogai T, Takanishi J, Asai S, Ando C, Tsutsumi T, Watanabe K, Sakakura A, Tsunematsu Y. Synthesis and biological evaluation of coprinoferrin, an acylated tripeptide hydroxamate siderophore. Org Biomol Chem 2024; 22:831-837. [PMID: 38175167 DOI: 10.1039/d3ob01850d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Coprinoferrin (CPF), originally isolated from a genetically engineered strain (ΔlaeA) of the mushroom fungus Coprinopsis cinerea, is an acylated tripeptide hydroxamate consisting of tandem aligned N5-hexanoyl-N5-hydroxy-L-ornithine with modifications of N-acetyl and C-carboxamide. These unique chemical properties make CPF an iron(III) binder (siderophore), which helps in iron acquisition from the environment and promotes hyphal growth as well as fruiting body formation in C. cinerea. However, CPF's detailed mode of action remains enigmatic. In this study, we have accomplished the synthesis of CPF from N-Boc-L-glutamic acid 5-benzyl ester. The physicochemical characteristics, spectroscopic features, and biological activity observed in the synthetic CPF closely match those of natural CPF. This alignment provides unequivocal confirmation of the proposed chemical structure, facilitating a deeper understanding of its physiological role in nature, particularly in fruiting body formation.
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Affiliation(s)
- Ichiro Hayakawa
- Graduate School of Integrated Basic Sciences, Nihon University, 3-25-40 Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan.
| | - Tomoki Isogai
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan.
| | - Jun Takanishi
- Department of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan.
| | - Shihori Asai
- Department of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan.
| | - Chika Ando
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi, 464-8601, Japan.
| | - Tomohiro Tsutsumi
- Graduate School of Integrated Basic Sciences, Nihon University, 3-25-40 Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan.
| | - Kenji Watanabe
- Department of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan.
| | - Akira Sakakura
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan.
| | - Yuta Tsunematsu
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi, 464-8601, Japan.
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2
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Brittain WDG, Cobb SL. Negishi cross-couplings in the synthesis of amino acids. Org Biomol Chem 2018; 16:10-20. [PMID: 29199315 DOI: 10.1039/c7ob02682j] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The Negishi cross-coupling is a powerful C-C bond-forming reaction widely utilised in many areas of organic synthesis. This review details the use of Negishi cross-couplings in the synthesis of unnatural amino acids. The application of this reaction in the preparation of aromatic, heteroaromatic, and, complex amino acid derivatives are reviewed and presented herein.
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Affiliation(s)
| | - Steven L Cobb
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK.
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3
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Pelà M, Saxena P, Luciani R, Santucci M, Ferrari S, Marverti G, Marraccini C, Martello A, Pirondi S, Genovese F, Salvadori S, D’Arca D, Ponterini G, Costi MP, Guerrini R. Optimization of Peptides That Target Human Thymidylate Synthase to Inhibit Ovarian Cancer Cell Growth. J Med Chem 2014; 57:1355-67. [DOI: 10.1021/jm401574p] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michela Pelà
- Department of Chemical and Pharmaceutical Sciences, University of Ferrara, via Fossato di Mortara 17-19, 44100 Ferrara, Italy
| | - Puneet Saxena
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Rosaria Luciani
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Matteo Santucci
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Stefania Ferrari
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Gaetano Marverti
- Department of Biomedical Sciences, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, via Campi 287, 41125 Modena, Italy
| | - Chiara Marraccini
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Andrea Martello
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Silvia Pirondi
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Filippo Genovese
- C.I.G.S. (Centro Interdipartimentale Grandi Strumenti), University of Modena and Reggio Emilia, via Campi 213/A, 41125 Modena, Italy
| | - Severo Salvadori
- Department of Chemical and Pharmaceutical Sciences, University of Ferrara, via Fossato di Mortara 17-19, 44100 Ferrara, Italy
- LTTA (Laboratorio per le Tecnologie delle Terapie Avanzate), via Fossato di Mortara 17-19, 44100 Ferrara, Italy
| | - Domenico D’Arca
- Department of Biomedical Sciences, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, via Campi 287, 41125 Modena, Italy
| | - Glauco Ponterini
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Maria Paola Costi
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Remo Guerrini
- Department of Chemical and Pharmaceutical Sciences, University of Ferrara, via Fossato di Mortara 17-19, 44100 Ferrara, Italy
- LTTA (Laboratorio per le Tecnologie delle Terapie Avanzate), via Fossato di Mortara 17-19, 44100 Ferrara, Italy
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4
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Chang TC, Lai CH, Chien CW, Liang CF, Adak AK, Chuang YJ, Chen YJ, Lin CC. Synthesis and Evaluation of a Photoactive Probe with a Multivalent Carbohydrate for Capturing Carbohydrate–Lectin Interactions. Bioconjug Chem 2013; 24:1895-906. [DOI: 10.1021/bc400306g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
| | | | - Chih-Wei Chien
- Department
of Chemistry and
- Institute
of Chemistry, Academia Sinica, 128 Sec. 2, Academia Rd, Nankang Taipei 115, Taiwan
| | | | | | - Yung-Jen Chuang
- Institute
of Bioinformatics and Structural Biology, National Tsing Hua University, 101 Sec. 2, Kuang Fu Rd., Hsinchu 30013, Taiwan
| | - Yu-Ju Chen
- Institute
of Chemistry, Academia Sinica, 128 Sec. 2, Academia Rd, Nankang Taipei 115, Taiwan
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5
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Miller DK. Facile conversion of chromane-6-triflate to chromane-6-alanines under palladium conditions. Tetrahedron Lett 2013; 54:811-813. [DOI: 10.1016/j.tetlet.2012.11.115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Shih Y, Ke C, Pan C, Huang Y. Transition-metal catalyst free CN coupling with phenol/phenoxide: a green synthesis of a benzoxazole scaffold by an anodic oxidation reaction. RSC Adv 2013. [DOI: 10.1039/c3ra00128h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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7
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Mary YS, Raju K, Yildiz I, Temiz-Arpaci O, Nogueira HIS, Granadeiro CM, Van Alsenoy C. FT-IR, FT-Raman, SERS and computational study of 5-ethylsulphonyl-2-(o-chlorobenzyl)benzoxazole. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 96:617-25. [PMID: 22868334 DOI: 10.1016/j.saa.2012.07.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2012] [Revised: 06/10/2012] [Accepted: 07/05/2012] [Indexed: 05/25/2023]
Abstract
FT-IR, FT-Raman and surface-enhanced Raman scattering spectra of 5-ethylsulphonyl-2-(o-chlorobenzyl)benzoxazole were recorded and analyzed. The vibrational wavenumbers were examined theoretically using the Gaussian09 set of quantum chemistry codes, and the normal modes were assigned by potential energy distribution calculations. The presence of CH(2), SO(2) and CH(3) modes in the SERS spectrum indicates the nearness of the methyl group to the metal surface which affects the orientation and metal molecule interaction. The synthesis, NMR spectra and antibacterial properties are reported. The title compound shows more inhibitory effect against Pseudomonas aeruginosa than ampicillin and found to be more potent against Klebsiella pneumoniae and drug-resistant Bacillus subtilis than the other microorganisms. A computation of the first hyperpolarizability indicates that the compound may be a good candidate as a NLO material. The RMS errors of the observed Raman and IR bands are found to be 30.93, 29.77 for HF and 9.57, 6.75 for DFT methods, respectively.
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Affiliation(s)
- Y Sheena Mary
- Department of Physics, Fatima Mata National College, Kollam, Kerala, India.
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8
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Kopp F, Stratton CF, Akella LB, Tan DS. A diversity-oriented synthesis approach to macrocycles via oxidative ring expansion. Nat Chem Biol 2012; 8:358-65. [PMID: 22406518 PMCID: PMC3359144 DOI: 10.1038/nchembio.911] [Citation(s) in RCA: 128] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Accepted: 01/17/2012] [Indexed: 02/07/2023]
Abstract
Macrocycles are key structural elements in numerous bioactive small molecules and are attractive targets in the diversity-oriented synthesis of natural product-based libraries. However, efficient and systematic access to diverse collections of macrocycles has proven difficult using classical macrocyclization reactions. To address this problem, we have developed a concise, modular approach to the diversity-oriented synthesis of macrolactones and macrolactams involving oxidative cleavage of a bridging double bond in polycyclic enol ethers and enamines. These substrates are assembled in only 4–5 synthetic steps and undergo ring expansion to afford highly functionalized macrocycles bearing handles for further diversification. In contrast to macrocyclization reactions of corresponding seco-acids, the ring expansion reactions are efficient and insensitive to ring size and stereochemistry, overcoming key limitations of conventional approaches to systematic macrocycle synthesis. Cheminformatic analysis indicates that these macrocycles access regions of chemical space that overlap with natural products, distinct from currently-targeted synthetic drugs.
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Affiliation(s)
- Felix Kopp
- Molecular Pharmacology & Chemistry Program, Memorial Sloan-Kettering Cancer Center, New York, New York, USA
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9
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Protein-protein interface-binding peptides inhibit the cancer therapy target human thymidylate synthase. Proc Natl Acad Sci U S A 2011; 108:E542-9. [PMID: 21795601 DOI: 10.1073/pnas.1104829108] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Human thymidylate synthase is a homodimeric enzyme that plays a key role in DNA synthesis and is a target for several clinically important anticancer drugs that bind to its active site. We have designed peptides to specifically target its dimer interface. Here we show through X-ray diffraction, spectroscopic, kinetic, and calorimetric evidence that the peptides do indeed bind at the interface of the dimeric protein and stabilize its di-inactive form. The "LR" peptide binds at a previously unknown binding site and shows a previously undescribed mechanism for the allosteric inhibition of a homodimeric enzyme. It inhibits the intracellular enzyme in ovarian cancer cells and reduces cellular growth at low micromolar concentrations in both cisplatin-sensitive and -resistant cells without causing protein overexpression. This peptide demonstrates the potential of allosteric inhibition of hTS for overcoming platinum drug resistance in ovarian cancer.
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10
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Youssef C, Ammar HB, Belhouchet M, Beydoun K, Salem RB, Doucet H, Dixneuf PH. Syntheses of new benzoxazole derivatives. J Heterocycl Chem 2011. [DOI: 10.1002/jhet.623] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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11
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Affiliation(s)
- Christopher J Farady
- Graduate Group in Biophysics, University of California-San Francisco, San Francisco, CA 94143-2240, USA
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12
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Giménez-Oya V, Villacañas Ó, Obiol-Pardo C, Antolin-Llovera M, Rubio-Martinez J, Imperial S. Design of novel ligands of CDP-methylerythritol kinase by mimicking direct protein-protein and solvent-mediated interactions. J Mol Recognit 2010; 24:71-80. [DOI: 10.1002/jmr.1024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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13
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Ross AJ, Lang HL, Jackson RFW. Much Improved Conditions for the Negishi Cross-Coupling of Iodoalanine Derived Zinc Reagents with Aryl Halides. J Org Chem 2009; 75:245-8. [DOI: 10.1021/jo902238n] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrew J. Ross
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Hannah L. Lang
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Richard F. W. Jackson
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
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14
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Nolasco L, Perez Gonzalez M, Caggiano L, Jackson RFW. Application of Negishi Cross-Coupling to the Synthesis of the Cyclic Tripeptides OF4949-III and K-13. J Org Chem 2009; 74:8280-9. [DOI: 10.1021/jo9018792] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Luca Nolasco
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Manuel Perez Gonzalez
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Lorenzo Caggiano
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Richard F. W. Jackson
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
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15
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Vibrational spectra and molecular structure of 3-(piperidine-1-yl-methyl)-1,3-benzoxazol-2(3H)-one molecule by density functional theory and Hartree–Fock calculations. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2009.02.017] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Synthesis of some novel 2-substituted benzoxazoles as anticancer, antifungal, and antimicrobial agents. Med Chem Res 2008. [DOI: 10.1007/s00044-007-9076-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Negishi cross-coupling reactions of α-amino acid-derived organozinc reagents and aromatic bromides. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.11.031] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Tsantrizos YS, Ferland JM, McClory A, Poirier M, Farina V, Yee NK, Wang XJ, Haddad N, Wei X, Xu J, Zhang L. Olefin ring-closing metathesis as a powerful tool in drug discovery and development – potent macrocyclic inhibitors of the hepatitis C virus NS3 protease. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2006.09.027] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Kruppa M, Imperato G, König B. Synthesis of chiral amino acids with metal ion chelating side chains from l-serine using Negishi cross-coupling reaction. Tetrahedron 2006. [DOI: 10.1016/j.tet.2005.11.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Balasubramanian S, Aridoss G, Parthiban P, Ramalingan C, Kabilan S. Synthesis and Biological Evaluation of Novel Benzimidazol/Benzoxazolylethoxypiperidone Oximes. Biol Pharm Bull 2006; 29:125-30. [PMID: 16394524 DOI: 10.1248/bpb.29.125] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Some novel benzimidazol/benzoxazolylethoxypiperidone oximes were synthesized and their antibacterial activity against Staphylococcus aureus (NCIM-2492), Bacillus subtilis (NCIM-2439), Escherichia coli (NCIM-2345) and Pseudomonas aeruginosa (NCIM-2035) and antifungal activity against Candida albicans (NCIM-C27), Candida-6 (NCIM-C27), Candida-51 (NCIM-C27), Aspergillus niger (NCIM-590) and Aspergillus flavus (NCIM-539) have been evaluated. Compounds 26 and 27 exerted potent in vitro antibacterial activity against Bacillus subtilis, Escherichia coli and Staphylococcus aureus while compounds 26, 29 and 30 exhibited potent in vitro antifungal activity against Candida albicans, Candida-51, and Aspergillus niger.
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21
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Moreno E, Nolasco LA, Caggiano L, Jackson RFW. Synthesis of orthogonally protected biaryl amino acid derivatives. Org Biomol Chem 2006; 4:3639-47. [PMID: 16990939 DOI: 10.1039/b609360d] [Citation(s) in RCA: 13] [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 efficient and direct synthesis of protected biaryl amino acids, including dityrosine (50% overall yield over 3 steps), by Negishi cross-coupling of the serine-derived organozinc reagent 4 with iodo- and di-iodobiaryls, is reported. An improved, although still not perfect, diiodination of 2,2'-biphenol has been achieved using NMe3BnICl2-ZnCl2. Protection of phenolic hydroxyl groups as acetates, rather than benzyl ethers, is required for efficient cross-coupling, and evidence for acetyl migration has been observed during debenzylation of a substituted 2-acetoxy-2'-benzyloxybiaryl. Aromatic C-I to C-Cl conversion has been detected as a minor reaction pathway in the palladium-catalyzed coupling of aryl iodide 3b with organozinc reagent 4.
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Affiliation(s)
- Eduardo Moreno
- Department of Chemistry, Dainton Building, University of Sheffield, Brook Hill, Sheffield, UK S3 7HF
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22
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Chang YP, Chu YH. Using surface plasmon resonance to directly determine binding affinities of combinatorially selected cyclopeptides and their linear analogs to a streptavidin chip. Anal Biochem 2005; 340:74-9. [PMID: 15802132 DOI: 10.1016/j.ab.2005.01.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2004] [Indexed: 11/28/2022]
Abstract
In our recent report, several HPQ-containing streptavidin ligands were identified from a structurally constrained combinatorial library, and the relative affinities in IC(50) of these tight-binding ligands were revealed by a captured enzyme-linked immunosorbent assay. In the present work, surface plasmon resonance was employed to directly evaluate the binding affinities between immobilized streptavidin and combinatorially selected ligands. The equilibrium dissociation constants and kinetic on/off rates of a previously identified N-to-side chain and newly synthesized N-to-C cyclopeptides were readily deduced using Scatchard analysis and computational simulation. It was found that both cyclopeptides bound streptavidin far more tightly than its linear counterpart ( approximately 1000-fold), while the reversed (QPH) linear and cyclic peptidyl ligands were hardly recognized by streptavidin. Consequently, not only was the binding specificity of synthetic ligands distinguished qualitatively but also the entropic advantage of conformationally constrained cyclopeptides over their linear forms was demonstrated quantitatively by surface plasmon resonance.
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Affiliation(s)
- Yi-Pin Chang
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi, Taiwan 621, Republic of China
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23
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Obata R, Ohshiro T, Tomoda H, Nishiyama S. Discovery of halogenated eurypamide B analogues as inhibitors of lipid droplet accumulation in macrophages. Bioorg Med Chem Lett 2005; 15:4189-91. [PMID: 16054812 DOI: 10.1016/j.bmcl.2005.06.070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2005] [Revised: 06/17/2005] [Accepted: 06/27/2005] [Indexed: 11/25/2022]
Abstract
Halogenated cyclic isodityrosine-tripeptides were synthesized as analogues of a marine natural product, eurypamide B. Although the original eurypamides showed no inhibitory activity, the new analogues were found to inhibit lipid droplet accumulation in macrophages with a low micromolar IC50 value.
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Affiliation(s)
- Rika Obata
- Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan
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24
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Goudreau N, Brochu C, Cameron DR, Duceppe JS, Faucher AM, Ferland JM, Grand-Maître C, Poirier M, Simoneau B, Tsantrizos YS. Potent Inhibitors of the Hepatitis C Virus NS3 Protease: Design and Synthesis of Macrocyclic Substrate-Based β-Strand Mimics. J Org Chem 2004; 69:6185-201. [PMID: 15357576 DOI: 10.1021/jo049288r] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The virally encoded NS3 protease is essential to the life cycle of the hepatitis C virus (HCV), an important human pathogen causing chronic hepatitis, cirrhosis of the liver, and hepatocellular carcinoma. The design and synthesis of 15-membered ring beta-strand mimics which are capable of inhibiting the interactions between the HCV NS3 protease enzyme and its polyprotein substrate will be described. The binding interactions between a macrocyclic ligand and the enzyme were explored by NMR and molecular dynamics, and a model of the ligand/enzyme complex was developed.
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Affiliation(s)
- Nathalie Goudreau
- Department of Chemistry, Boehringer Ingelheim Ltd., Research and Development, 2100 Cunard Street, Laval, Quebec, Canada H7S 2G5
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25
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Ramalingan C, Balasubramanian S, Kabilan S, Vasudevan M. Synthesis and study of antibacterial and antifungal activities of novel 1-[2-(benzoxazol-2-yl)ethoxy]- 2,6-diarylpiperidin-4-ones. Eur J Med Chem 2004; 39:527-33. [PMID: 15183911 DOI: 10.1016/j.ejmech.2004.02.005] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2003] [Revised: 02/11/2004] [Accepted: 02/11/2004] [Indexed: 11/27/2022]
Abstract
Some novel benzoxazolylethoxypiperidones have been synthesized and their antibacterial activity against streptococcus faecalis, bacillus subtilis, escherichia coli, staphylococcus aureus aand pseudomonas aeruginosa and antifungal activity against Candida-6, Candida albicans, Aspergillus niger, Candida-51 and Aspergillus flavus were evaluated. Compounds 37, 38 and 39 exerted potent in vitro antibacterial activity against Streptococcus faecalis while compounds 40 and 41 exhibited potent in vitro antifungal activity against Candida-51.
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Affiliation(s)
- C Ramalingan
- Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India
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26
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Anderson JT, Toogood PL, Marsh ENG. A short and efficient synthesis of L-5,5,5,5',5',5'-hexafluoroleucine from N-Cbz-L-serine. Org Lett 2002; 4:4281-3. [PMID: 12443078 DOI: 10.1021/ol026922j] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] 5,5,5,5',5',5'-Hexafluoroleucine (6), a fluorous analogue of leucine, is of considerable interest as a building block in the design of fluorous proteins and peptides. We report a short and efficient synthesis of 6, which is obtained from N-Cbz-L-serine (1) in 50% overall yield, 99% enantiomeric excess, and in multigram quantities. Key steps are addition of a serine-derived organozincate to hexafluoroacetone to construct the hexafluoroleucine side chain, followed by radical-mediated deoxygenation of the resulting tertiary alcohol.
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Affiliation(s)
- James T Anderson
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA
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