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Qiu JK, Hao WJ, Li G, Jiang B. Oxidative Catalytic Spiroketalization Leading to Diastereoselective Synthesis of Spiro[benzofuran-2,1′-isochromene]s. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701149] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jiang-Kai Qiu
- Institute of Chemistry & BioMedical Sciences; Nanjing University; Nanjing 210023 People's Republic of China
- Department of Chemistry and Biochemistry; Texas Tech University; Lubbock, Texas 79409-1061 United States
| | - Wen-Juan Hao
- School of Chemistry and Material Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou 211116 People's Republic of China
| | - Guigen Li
- Institute of Chemistry & BioMedical Sciences; Nanjing University; Nanjing 210023 People's Republic of China
- Department of Chemistry and Biochemistry; Texas Tech University; Lubbock, Texas 79409-1061 United States
| | - Bo Jiang
- Department of Chemistry and Biochemistry; Texas Tech University; Lubbock, Texas 79409-1061 United States
- School of Chemistry and Material Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou 211116 People's Republic of China
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2
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Wilsdorf M, Reissig HU. Towards γ-Rubromycin: Model Studies, Development of a C3Building Block, and Synthesis of 4′-Silyl-γ-rubromycin. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601224] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Michael Wilsdorf
- Institut für Chemie und Biochemie; Freie Universität Berlin; Takustr. 3 14195 Berlin Germany
| | - Hans-Ulrich Reissig
- Institut für Chemie und Biochemie; Freie Universität Berlin; Takustr. 3 14195 Berlin Germany
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3
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Wilsdorf M, Lentz D, Reissig HU. Model Studies towards Functionalized Bisbenzannulated [5,6]-Spiroketals. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501586] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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4
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Yoneda N, Fukata Y, Asano K, Matsubara S. Asymmetric Synthesis of Spiroketals with Aminothiourea Catalysts. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508405] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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5
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Yoneda N, Fukata Y, Asano K, Matsubara S. Asymmetric Synthesis of Spiroketals with Aminothiourea Catalysts. Angew Chem Int Ed Engl 2015; 54:15497-500. [DOI: 10.1002/anie.201508405] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Naoki Yoneda
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku‐Katsura, Nishikyo, Kyoto 615‐8510 (Japan)
| | - Yukihiro Fukata
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku‐Katsura, Nishikyo, Kyoto 615‐8510 (Japan)
| | - Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku‐Katsura, Nishikyo, Kyoto 615‐8510 (Japan)
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku‐Katsura, Nishikyo, Kyoto 615‐8510 (Japan)
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6
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Atkinson DJ, Brimble MA. Isolation, biological activity, biosynthesis and synthetic studies towards the rubromycin family of natural products. Nat Prod Rep 2015; 32:811-40. [DOI: 10.1039/c4np00153b] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The rubromycins are a unique family of natural products. This review covers their isolation, biological activity, biosynthesis and a detailed discussion of the diverse chemistry employed for total synthesis.
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Affiliation(s)
- Darcy J. Atkinson
- School of Chemical Sciences, The University of Auckland
- Auckland
- New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland
- Auckland
| | - Margaret A. Brimble
- School of Chemical Sciences, The University of Auckland
- Auckland
- New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland
- Auckland
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7
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Wang X, Guo P, Wang X, Wang Z, Ding K. Practical Asymmetric Catalytic Synthesis of Spiroketals and Chiral Diphosphine Ligands. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300380] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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8
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Wang W, Xue J, Tian T, Zhang J, Wei L, Shao J, Xie Z, Li Y. Total synthesis of (±)-δ-rubromycin. Org Lett 2013; 15:2402-5. [PMID: 23635026 DOI: 10.1021/ol400864f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Transition-metal-catalyzed spiroketalization cyclization has been performed successfully and has led to the first total synthesis of (±)-δ-rubromycin with a longest linear sequence of 18 steps from commercially available guaiacol in a 2.7% overall yield.
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Affiliation(s)
- Wenjing Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, Gansu, P. R. China
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9
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Li X, Xue J, Huang C, Li Y. Copper(I)-Catalyzed Hydroalkoxylation/Hydrogen-Bonding-Induced Asymmetric Hetero-Diels-Alder Cycloaddition Cascade: An Approach to Aromatic Spiroketals. Chem Asian J 2012; 7:903-6. [DOI: 10.1002/asia.201101056] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Indexed: 11/10/2022]
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10
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Wang X, Han Z, Wang Z, Ding K. Catalytic Asymmetric Synthesis of Aromatic Spiroketals by SpinPhox/Iridium(I)-Catalyzed Hydrogenation and Spiroketalization of α,α′-Bis(2-hydroxyarylidene) Ketones. Angew Chem Int Ed Engl 2011; 51:936-40. [DOI: 10.1002/anie.201106488] [Citation(s) in RCA: 208] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Indexed: 11/06/2022]
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11
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Wang X, Han Z, Wang Z, Ding K. Catalytic Asymmetric Synthesis of Aromatic Spiroketals by SpinPhox/Iridium(I)-Catalyzed Hydrogenation and Spiroketalization of α,α′-Bis(2-hydroxyarylidene) Ketones. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201106488] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Wu KL, Mercado EV, Pettus TRR. A Convergent Total Synthesis of (±)-γ-Rubromycin. J Am Chem Soc 2011; 133:6114-7. [DOI: 10.1021/ja1115524] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kun-Liang Wu
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
| | - Eduardo V. Mercado
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
| | - Thomas R. R. Pettus
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
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13
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Rathwell D, Yang SH, Tsang K, Brimble M. An Efficient Formal Synthesis of the Human Telomerase Inhibitor (±)-γ-Rubromycin. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200903316] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Rathwell D, Yang SH, Tsang K, Brimble M. An Efficient Formal Synthesis of the Human Telomerase Inhibitor (±)-γ-Rubromycin. Angew Chem Int Ed Engl 2009; 48:7996-8000. [DOI: 10.1002/anie.200903316] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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15
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Zhou G, Zhu J, Xie Z, Li Y. An Efficient Synthesis of Highly Functionalized [5,6] Aromatic Spiroketals by Hetero-Diels−Alder Reaction. Org Lett 2008; 10:721-4. [PMID: 18266379 DOI: 10.1021/ol7029068] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guanglian Zhou
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Jianrong Zhu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Zhixiang Xie
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Ying Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
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16
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Lowell AN, Fennie MW, Kozlowski MC. A Concise Synthesis of the Naphthalene Portion of Purpuromycin. J Org Chem 2008; 73:1911-8. [DOI: 10.1021/jo7024114] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew N. Lowell
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Michael W. Fennie
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Marisa C. Kozlowski
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
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17
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Ballini R, Petrini M, Rosini G. Nitroalkanes as central reagents in the synthesis of spiroketals. Molecules 2008; 13:319-30. [PMID: 18305420 PMCID: PMC6244950 DOI: 10.3390/molecules13020319] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2008] [Revised: 02/02/2008] [Accepted: 02/04/2008] [Indexed: 11/28/2022] Open
Abstract
Nitroalkanes can be profitably employed as carbanionic precursors for the assembly of dihydroxy ketone frameworks, suitable for the preparation of spiroketals. The carbon-carbon bond formation is carried out exploiting nitroaldol and Michael reactions, while the nitro to carbonyl conversion (Nef reaction) ensures the correct introduction of the keto group. Several spiroketal systems endowed with considerable biological activity can be prepared using this synthetic strategy.
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Affiliation(s)
- Roberto Ballini
- Dipartimento di Scienze Chimiche, Università di Camerino, via S.Agostino, 1, I-62032 Camerino, Italy; E-mail:
- Author to whom correspondence should be addressed; E-Mail: ; Fax: +39 0737 402297
| | - Marino Petrini
- Dipartimento di Scienze Chimiche, Università di Camerino, via S.Agostino, 1, I-62032 Camerino, Italy; E-mail:
| | - Goffredo Rosini
- Dipartimento di Chimica Organica ‘A. Mangini’, Alma Mater Studiorum–Università di Bologna, Viale del Risorgimento n. 4, 40136 Bologna, Italy; E-mail:
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18
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Wu KL, Wilkinson S, Reich NO, Pettus TRR. Facile synthesis of naphthoquinone spiroketals by diastereoselective oxidative [3 + 2] cycloaddition. Org Lett 2007; 9:5537-40. [PMID: 18044909 PMCID: PMC2430727 DOI: 10.1021/ol702450d] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A highly selective oxidative [3 + 2] cycloaddition of chiral enol ethers and hydroxynaphthoquinone is described. This convergent strategy is amenable to an enantioselective synthesis of beta-rubromycin and related naphthoquinone spiroketals. Several compounds were found to inhibit DNA-polymerase and telomerase in a manner resembling alpha-rubromycin and beta-rubromycin.
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Affiliation(s)
- Kun-Liang Wu
- Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, California 93106-9510, USA
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19
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Akai S, Kakiguchi K, Nakamura Y, Kuriwaki I, Dohi T, Harada S, Kubo O, Morita N, Kita Y. Total synthesis of (+/-)-gamma-rubromycin on the basis of two aromatic Pummerer-type reactions. Angew Chem Int Ed Engl 2007; 46:7458-61. [PMID: 17702074 DOI: 10.1002/anie.200702382] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shuji Akai
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6, Yamada-oka, Suita, Osaka 565-0871, Japan
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20
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Akai S, Kakiguchi K, Nakamura Y, Kuriwaki I, Dohi T, Harada S, Kubo O, Morita N, Kita Y. Total Synthesis of (±)-γ-Rubromycin on the Basis of Two Aromatic Pummerer-Type Reactions. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200702382] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Brasholz M, Sörgel S, Azap C, Reißig H. Rubromycins: Structurally Intriguing, Biologically Valuable, Synthetically Challenging Antitumour Antibiotics. European J Org Chem 2007. [DOI: 10.1002/ejoc.200601054] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Malte Brasholz
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany, Fax: +49‐30‐838‐55367
| | - Sebastian Sörgel
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany, Fax: +49‐30‐838‐55367
| | - Cengiz Azap
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany, Fax: +49‐30‐838‐55367
| | - Hans‐Ulrich Reißig
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany, Fax: +49‐30‐838‐55367
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22
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Synthesis of aromatic spiroacetals related to γ-rubromycin based on a 3H-spiro[1-benzofuran-2,2′-chromane] skeleton. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.02.033] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Sörgel S, Azap C, Reißig HU. Preparation of Highly Alkoxy-Substituted Naphthaldehyde Derivatives – A Regioselective Approach to Building Blocks for the Synthesis of Rubromycins. European J Org Chem 2006. [DOI: 10.1002/ejoc.200600353] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Sörgel S, Azap C, Reissig HU. Synthesis of Bisbenzannulated SpiroketalsModel Studies for a Modular Approach to Rubromycins. Org Lett 2006; 8:4875-8. [PMID: 17020325 DOI: 10.1021/ol061932w] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] A highly flexible synthesis of bisbenzannulated spiroketals is described with additions of lithiated methoxyallene to aryl aldehydes and Heck reactions as key steps. Subsequent hydrogenations and ketalizations afforded the desired spiroketals in good yields and with predominating trans-configuration. With model compound 30, already bearing the fully substituted naphthyl core of rubromycins, the ketalization proceeded efficiently providing the expected product 31 and the isopropoxy compound 32. Both products are advanced model compounds of heliquinomycin.
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Affiliation(s)
- Sebastian Sörgel
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, D-14195 Berlin, Germany
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25
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Convergent route to the purpuromycin bisphenolic spiroketal: hydrogen bonding control of spiroketalization stereochemistry. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.05.044] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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A facile synthesis of fused aromatic spiroacetals based on the 3,4,3′,4′-tetrahydro-2,2′-spirobis(2H-1-benzopyran) skeleton. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.04.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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27
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Zhou G, Zheng D, Da S, Xie Z, Li Y. Expeditious synthesis of the aromatic spiroketal skeleton using hetero-Diels–Alder cycloaddition. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.03.092] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Abstract
[reaction: see text] A strategy for the construction of electron deficient 5,6-aryloxy spiroketal is reported. The process should prove useful for the synthesis of natural products containing similar spiroketals. The strategy uncovers an unexpected rearrangement between ortho and para quinone spiroketals.
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Affiliation(s)
- Christopher C Lindsey
- Department of Chemistry and Biochemistry, University of California at Santa Barbara, 93106-9510, USA
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29
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30
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Tsang KY, Brimble MA, Bremner JB. Use of a Sonogashira−Acetylide Coupling Strategy for the Synthesis of the Aromatic Spiroketal Skeleton of γ-Rubromycin. Org Lett 2003; 5:4425-7. [PMID: 14602016 DOI: 10.1021/ol035723c] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] The synthesis of the fused aromatic spiroketal core of gamma-rubromycin is described via addition of an aryl acetylide fragment to an aryl acetaldehyde fragment. In turn, the aryl acetylene precursor was readily prepared with use of a Sonogashira reaction.
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Affiliation(s)
- Kit Y Tsang
- Department of Chemistry, University of Auckland, 23 Symonds Street, Auckland, New Zealand
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31
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Qin D, Ren RX, Siu T, Zheng C, Danishefsky SJ. Studies in the Total Synthesis of Heliquinomycinone: Proof of Concept and Assembly of a Fully Mature Spirocyclization Precursor. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20011217)113:24<4845::aid-ange4845>3.0.co;2-b] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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32
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Qin D, Ren RX, Siu T, Zheng C, Danishefsky SJ. Studies in the Total Synthesis of Heliquinomycinone: Proof of Concept and Assembly of a Fully Mature Spirocyclization Precursor This work was supported by the National Institutes of Health (Grant numbers: AI 16943 and HL25848). A Postdoctoral Fellowship is gratefully acknowledged by R.X.R. (NIH, Grant Number IF32EY06750-0181). The authors thank Dr. Daniel Chen for important initial experiments, Dr. Brian Bridgewater and Prof. Ged Parkin of Columbia University for X-ray crystal structure analysis of 11 a, and Yashuiro Itagaki for high-resolution mass spectral analyses. Angew Chem Int Ed Engl 2001; 40:4709-4713. [PMID: 12404391 DOI: 10.1002/1521-3773(20011217)40:24<4709::aid-anie4709>3.0.co;2-q] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Donghui Qin
- Department of Chemistry, Columbia University Havemeyer Hall, New York, NY, 10021 (USA)
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33
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Mizushina Y, Ueno T, Oda M, Yamaguchi T, Saneyoshi M, Sakaguchi K. The biochemical mode of inhibition of DNA polymerase beta by alpha-rubromycin. BIOCHIMICA ET BIOPHYSICA ACTA 2000; 1523:172-81. [PMID: 11042381 DOI: 10.1016/s0304-4165(00)00119-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Quinone antibiotics, alpha- and beta-rubromycin, were originally found as inhibitors of retroviral reverse transcriptase. We investigated the effects of these agents on DNA metabolic enzymes including DNA and RNA polymerases as retroviral reverse transcriptase is a kind of the polymerase. As expected, we found that alpha- and beta-rubromycin strongly inhibited not only the retroviral reverse transcriptase activity, but the activities of the mammalian DNA polymerases, telomerase and terminal deoxynucleotidyl transferase in vitro. These agents should therefore be classified as DNA polymerase inhibitors. The Ki values of alpha-rubromycin against nucleotide substrate were 0.66 and 0.17 microM for DNA polymerase alpha and beta (pol. alpha and beta), respectively, and those of beta-rubromycin was 2.40 and 10.5 microM, respectively. Alpha-rubromycin strongly inhibited the pol. beta activity, and showed the strongest pol. beta inhibitory effect reported to date. At least on pol. beta, alpha-rubromycin was suggested to bind to the active region competing with the nucleotide substrate, and subsequently inhibit the catalytic activity. alpha-Rubromycin directly competed with the nucleotide substrate, and indirectly but simultaneously and non-competitively disturbed the template-DNA interaction with pol. beta.
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Affiliation(s)
- Y Mizushina
- Department of Applied Biological Science, Science University of Tokyo, Noda, Chiba, Japan
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34
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Bringmann G, Kraus J, Schmitt U, Puder C, Zeeck A. Determination of the Absolute Configurations of γ-Rubromycin and Related Spiro Compounds by Quantum Chemical CD Calculations. European J Org Chem 2000. [DOI: 10.1002/1099-0690(200008)2000:15<2729::aid-ejoc2729>3.0.co;2-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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35
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Ueno T, Takahashi H, Oda M, Mizunuma M, Yokoyama A, Goto Y, Mizushina Y, Sakaguchi K, Hayashi H. Inhibition of human telomerase by rubromycins: implication of spiroketal system of the compounds as an active moiety. Biochemistry 2000; 39:5995-6002. [PMID: 10821671 DOI: 10.1021/bi992661i] [Citation(s) in RCA: 114] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We found that a group of rubromycins and their analogues, a class of quinone antibiotics that possesses benzofuran and benzodipyran rings to form a spiroketal system, strongly inhibited human telomerase as assessed with a modified telomeric repeat amplification protocol. beta- and gamma-Rubromycins and purpuromycin appeared to be the most potent telomerase inhibitors, with 50% inhibitory concentrations (IC(50)) of about 3 microM, and griseorhodins A and C also showed comparable potencies for the inhibition (IC(50) = 6-12 microM). In contrast, opening of the spiroketal system of beta-rubromycin, giving rise to alpha-rubromycin, substantially decreased its inhibitory potency toward telomerase (IC(50) > 200 microM), indicating the essential role of the spiroketal system in telomerase inhibition. A kinetic study of the inhibition by beta-rubromycin revealed a competitive interaction with respect to the telomerase substrate primer, with a K(i) of 0.74 microM, whereas a mixed type inhibition was observed with respect to the nucleotide substrate. beta-Rubromycin was also potent in inhibiting retroviral reverse transcriptases but had virtually no effect on other DNA/RNA-modifying enzymes including DNA and RNA polymerases, deoxyribonuclease, and topoisomerase. Although beta-rubromycin showed nonspecific cytotoxicities, reducing proliferation of cancer cells (IC(50) approximately 20 microM), we conclude that beta-rubromycin appears to be a lead structure for the development of more potent and selective inhibitors of human telomerase.
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Affiliation(s)
- T Ueno
- Pharmaceuticals & Biotechnology Laboratory, Japan Energy Corporation, Toda-shi, Saitama, 335-8502 Japan
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