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Abstract
The first total syntheses of newly isolated polyazole natural products azolemycins A–D, along with the synthesis of the tetra-oxazole non-natural analogue, are described.
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Affiliation(s)
| | - David J. Fox
- Department of Chemistry
- University of Warwick
- Coventry
- UK
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Houssen WE, Jaspars M. Azole-based cyclic peptides from the sea squirt Lissoclinum patella: old scaffolds, new avenues. Chembiochem 2011; 11:1803-15. [PMID: 20632432 DOI: 10.1002/cbic.201000230] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Wael E Houssen
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Old Aberdeen AB24 3UE, Scotland, UK
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3
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Ciufolini MA, Lefranc D. Micrococcin P1: Structure, biology and synthesis. Nat Prod Rep 2010; 27:330-42. [DOI: 10.1039/b919071f] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Notash B, Safari N, Abedi A, Amani V, Khavasi HR. Cadmium(II) complexes containing 2,2′-dimethyl-4,4′-bithiazole ligand: synthesis, characterization, and crystal structure. J COORD CHEM 2009. [DOI: 10.1080/00958970802672978] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Behrouz Notash
- a Chemistry Department , Shahid Beheshti University , G.C., Tehran, Iran
| | - Nasser Safari
- a Chemistry Department , Shahid Beheshti University , G.C., Tehran, Iran
| | - Anita Abedi
- b Department of Chemistry , North Tehran Branch, Islamic Azad University , Tehran, Iran
| | - Vahid Amani
- a Chemistry Department , Shahid Beheshti University , G.C., Tehran, Iran
| | - Hamid Reza Khavasi
- a Chemistry Department , Shahid Beheshti University , G.C., Tehran, Iran
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Clough JM, Dube H, Martin BJ, Pattenden G, Reddy KS, Waldron IR. Total synthesis of myxothiazols, novel bis-thiazole β-methoxyacrylate-based anti-fungal compounds from myxobacteria. Org Biomol Chem 2006; 4:2906-11. [PMID: 16855739 DOI: 10.1039/b603433k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Convergent total syntheses of myxothiazols A and Z are described. The syntheses are based on elaboration of the (S)-E,E-diene thioamide 22, conversion of 22 into the bis-thiazole 27 and Wittig reactions between 27c and the aldehyde 30. The substituted beta-methoxyacrylate aldehyde 30 was produced via an Evans asymmetric aldol protocol or via the 2H-pyran-2-one 31. An E-selective Wittig reaction between the ylide derived from the phosphonium salt 27c and the (+)-aldehyde 30 led to (+)-myxothiazol Z (1b), and a corresponding reaction with the (+/-)-acrylamide aldehyde 44 gave (+/-)-myxothiazol A (1a). Complementary studies led to synthesis of the ester 47b, corresponding to myxothiazol R and myxothiazol S.
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Affiliation(s)
- John M Clough
- School of Chemistry, University of Nottingham, University Park, UK
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Mahler G, Serra G, Dematteis S, Saldaña J, Domínguez L, Manta E. Synthesis and biological evaluation of simplified mycothiazole analogues. Bioorg Med Chem Lett 2005; 16:1309-11. [PMID: 16384701 DOI: 10.1016/j.bmcl.2005.11.072] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2005] [Revised: 11/15/2005] [Accepted: 11/17/2005] [Indexed: 11/23/2022]
Abstract
Thiazoline and oxazoline analogues of the natural product mycothiazole were synthesized from a common intermediate and evaluated in vitro against HCT-15 colon cancer cells and L(4) larvae of nematode Nippostrongylus brasiliensis. The nature of the heterocyclic moiety seems to modulate the cytotoxic or anthelmintic activity.
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Affiliation(s)
- Graciela Mahler
- Departamento de Química Orgánica, Cátedra de Química Farmacéutica Facultad de Química, Universidad de la República, Montevideo, Uruguay
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9
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Zou Y, Fahmi NE, Vialas C, Miller GM, Hecht SM. Total synthesis of deamido bleomycin a(2), the major catabolite of the antitumor agent bleomycin. J Am Chem Soc 2002; 124:9476-88. [PMID: 12167044 DOI: 10.1021/ja012741l] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Metabolic inactivation of the antitumor antibiotic bleomycin is believed to be mediated exclusively via the action of bleomycin hydrolase, a cysteine proteinase that is widely distributed in nature. While the spectrum of antitumor activity exhibited by the bleomycins is believed to reflect the anatomical distribution of bleomycin hydrolase within the host, little has been done to characterize the product of the putative inactivation at a chemical or biochemical level. The present report describes the synthesis of deamidobleomycin demethyl A(2) (3) and deamido bleomycin A(2) (4), as well as the respective aglycones. These compounds were all accessible via the key intermediate N(alpha)-Boc-N(beta)-[1-amino-3(S)-(4-amino-6-carboxy-5-methylpyrimidin-2-yl)propion-3-yl]-(S)-beta-aminoalanine tert-butyl ester (16). Synthetic deamido bleomycin A(2) was shown to be identical to the product formed by treatment of bleomycin A(2) with human bleomycin hydrolase, as judged by reversed-phase HPLC analysis and (1)H NMR spectroscopy. Deamido bleomycin A(2) was found to retain significant DNA cleavage activity in DNA plasmid relaxation assays and had the same sequence selectivity of DNA cleavage as bleomycin A(2). The most significant alteration of function noted in this study was a reduction in the ability of deamido bleomycin A(2) to mediate double-strand DNA cleavage, relative to that produced by BLM A(2).
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Affiliation(s)
- Ying Zou
- Contribution from the Department of Chemistry, University of Virginia, Charlottesville 22901, USA
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Pfund E, Lequeux T, Masson S, Vazeux M. Synthesis of thiazolines linked to a difluoromethylphosphonate diester via dithioester chemistry. Org Lett 2002; 4:843-6. [PMID: 11869142 DOI: 10.1021/ol025544f] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] A two-step, high-yielding synthesis of delta(2)-thiazolines containing a difluoromethylphosphonate diester moiety has been devised using a building block approach. Racemic or chiral beta-amino alcohols and diols were coupled with methyl difluoro(diethoxyphosphono)dithioacetate to give predominantly the corresponding beta-hydroxythioamides, which were then cyclized to provide a series of novel substituted delta(2)-thiazolines.
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Affiliation(s)
- Emmanuel Pfund
- Laboratoire de Chimie Moléculaire et Thio-organique UMR CNRS 6507 ISMRA, UFR Sciences, Université de Caen, 6 Bd Maréchal Juin, 14050 Caen Cedex, France
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Raman P, Razavi H, Kelly JW. Titanium(IV)-mediated tandem deprotection-cyclodehydration of protected cysteine N-amides: biomimetic syntheses of thiazoline- and thiazole-containing heterocycles. Org Lett 2000; 2:3289-92. [PMID: 11029192 DOI: 10.1021/ol000178q] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The scope and limitations of TiCl(4)-mediated Delta(2)-thiazoline synthesis via tandem deprotection-dehydrocyclization of trityl-protected cysteine N-amides is presented. While chemical yields are acceptable (53-96%), the stereochemical outcomes vary on the basis of structural considerations and reaction conditions (22-99% ee). Racemization at the C(2)-exomethine position limits the utility of this method for the formation of a thiazoline within a peptide. Treatment of a tritylated Cys-Cys dipeptide with TiCl(4) afforded the corresponding thiazole-thiazoline heterocycle 12 (38% yield, 97% ee).
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Affiliation(s)
- P Raman
- Department of Chemistry and The Skaggs Institute of Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road (MB12), La Jolla, California 92037, USA
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Li G, Warner PM, Jebaratnam DJ. Synthesis of a Directly Connected Thiazole-Oxazole Ring System Present in Microcin B17. J Org Chem 1996; 61:778-780. [PMID: 11667005 DOI: 10.1021/jo951023c] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gang Li
- Department of Chemistry, Northeastern University, Boston, Massachusetts 02115
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Steel PJ. Aromatic Biheterocycles: Syntheses, Structures, and Properties. ADVANCES IN HETEROCYCLIC CHEMISTRY 1996. [DOI: 10.1016/s0065-2725(08)60070-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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16
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Tuinman AA, Pettit GR. Analysis of the amino acid sequence of peptides by mass spectrometry. An ion notation proposal. INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH 1990; 36:331-4. [PMID: 2079388 DOI: 10.1111/j.1399-3011.1990.tb01290.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A new nomenclature is proposed that allows a precise and concise description of mass spectrometric fragments derived from peptides. The nomenclature differs from existing methods by specifically accommodating (1) extended or unusual amino acid residues, (2) cyclic- and cyclodepsipeptides, and (3) residues contained in branches of the main chain.
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Affiliation(s)
- A A Tuinman
- Cancer Research Institute, Arizona State University, Tempe
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Iwakawa M, Kobayashi Y, Ikuta SI, Yoshimura J. A FACILE SYNTHETIC APPROACH TO THE FRAGMENT D OF ANTIBIOTIC NOSIHEPTIDE, 2-[1-AMINO-3-CARBOXY-3-HYDROXY-(1S,3S)-PROPYL]-THIAZOLE-4-CARBOXYLIC ACID. CHEM LETT 1982. [DOI: 10.1246/cl.1982.1975] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Schmidt U, Häusler J, Ohler E, Poisel H. Dehydroamino acids, alpha-hydroxy-alpha-amino acids and alpha-mercapto-alpha-amino acids. FORTSCHRITTE DER CHEMIE ORGANISCHER NATURSTOFFE = PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS. PROGRES DANS LA CHIMIE DES SUBSTANCES ORGANIQUES NATURELLES 1979; 37:251. [PMID: 396213 DOI: 10.1007/978-3-7091-8545-2_3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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