1
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Lemos BC, Westphal R, Filho EV, Fiorot RG, Carneiro JWM, Gomes ACC, Guimarães CJ, de Oliveira FCE, Costa PMS, Pessoa C, Greco SJ. Synthetic enamine naphthoquinone derived from lawsone as cytotoxic agents assessed by in vitro and in silico evaluations. Bioorg Med Chem Lett 2021; 53:128419. [PMID: 34715305 DOI: 10.1016/j.bmcl.2021.128419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 10/15/2021] [Accepted: 10/19/2021] [Indexed: 10/20/2022]
Abstract
We synthesized ten enamine naphthoquinones with yields ranging from 43 to 76%. These compounds were screened for their in vitro antiproliferative activities by MTT assay against four types of human cancer cell lines: HCT116, PC3, HL60 and SNB19. The naphthoquinones bearing the picolylamine (7) and quinoline (12) moieties were the most actives (IC50 < 24 μM for all the cell lines), which were comparable or better to the values obtained for the control drugs. In silico evaluations allowed us to develop a qualitative Structure-Activity Relationship which suggest that electrostatic features, particularly the C2-C3 internuclear repulsion and the molecular dipole moment, relate to the biological response. Furthermore, Molecular Docking simulations indicate that the synthetic compounds have the potential to act as anticancer molecules by inhibiting topoisomerase-II and thymidylate synthase.
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Affiliation(s)
- Bárbara C Lemos
- Chemistry Department, Federal University of Espírito Santo, Vitória, Espírito Santo CEP.:29075-910, Brazil
| | - Regina Westphal
- Chemistry Department, Federal University of Espírito Santo, Vitória, Espírito Santo CEP.:29075-910, Brazil
| | - Eclair Venturini Filho
- Chemistry Department, Federal University of Espírito Santo, Vitória, Espírito Santo CEP.:29075-910, Brazil
| | - Rodolfo G Fiorot
- Chemistry Institute, Federal Fluminense University, Outeiro de São João Batista, 24020-141 Niteroi, RJ, Brazil
| | - José Walkimar M Carneiro
- Chemistry Institute, Federal Fluminense University, Outeiro de São João Batista, 24020-141 Niteroi, RJ, Brazil
| | - Anne Caroline C Gomes
- Faculty of Pharmacy, Federal Institute of Rio de Janeiro, Campus Realengo, Rio de Janeiro CEP.: 21715-000, Brazil
| | - Celina J Guimarães
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará., Fortaleza, Ceará CEP.: 60430-275, Brazil; Pharmacy Sector, Foundation of Oncology Control of the state of Amazonas, Manaus, Amazonas CEP.: 69040-010, Brazil
| | - Fátima C E de Oliveira
- Pharmacy Sector, Foundation of Oncology Control of the state of Amazonas, Manaus, Amazonas CEP.: 69040-010, Brazil
| | - Pedro Mikael S Costa
- Pharmacy Sector, Foundation of Oncology Control of the state of Amazonas, Manaus, Amazonas CEP.: 69040-010, Brazil
| | - Claudia Pessoa
- Pharmacy Sector, Foundation of Oncology Control of the state of Amazonas, Manaus, Amazonas CEP.: 69040-010, Brazil
| | - Sandro J Greco
- Chemistry Department, Federal University of Espírito Santo, Vitória, Espírito Santo CEP.:29075-910, Brazil.
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2
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Wang HH, Wang XD, Cao F, Gao WW, Ma SM, Li Z, Deng XM, Shi T, Wang Z. Application of palladium-catalyzed aryl C–H alkylation in total synthesis of (−)-berkelic acid. Org Chem Front 2021. [DOI: 10.1039/d0qo01003k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Total synthesis of the isochroman natural product (–)-berkelic acid.
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Affiliation(s)
- Hui-Hong Wang
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- China
| | | | - Fei Cao
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- China
| | - Wei-Wei Gao
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- China
| | - Shu-Meng Ma
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- China
| | - Zhao Li
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- China
| | - Xue-Mei Deng
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- China
| | - Tao Shi
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- China
| | - Zhen Wang
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- China
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3
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Zhou L, Yu SY, Tang Y, Wang L. Facile Stereoselective Approach to Diverse Spiroheterocyclic Tetrahydropyrans: Concise Synthesis of (+)-Broussonetine G and H. Angew Chem Int Ed Engl 2019; 58:15016-15020. [PMID: 31390139 DOI: 10.1002/anie.201907353] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 07/25/2019] [Indexed: 01/02/2023]
Abstract
A highly diastereoselective copper-catalyzed multicomponent cyclization of exocyclic enol ethers/enamines with methylene malonate and aldehydes has been developed to furnish spiroheterocyclic tetrahydropyrans in high yields with greater than 95:5 d.r. This method is practical, in that 36 examples, including a range of aldehydes and exo-vinyl heterocycles, are presented. By applying the newly developed method, the total synthesis of (+)-broussonetine G and formal synthesis of (+)-broussonetine H were achieved in a concise way.
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Affiliation(s)
- Li Zhou
- The State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, University of Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Shu-Yang Yu
- The State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, University of Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Yong Tang
- The State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, University of Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Lijia Wang
- The State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, University of Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China.,School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Rd., Shanghai, 200241, China
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4
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Zhou L, Yu S, Tang Y, Wang L. Facile Stereoselective Approach to Diverse Spiroheterocyclic Tetrahydropyrans: Concise Synthesis of (+)‐Broussonetine G and H. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907353] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Li Zhou
- The State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, CAS University of Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Shu‐Yang Yu
- The State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, CAS University of Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Yong Tang
- The State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, CAS University of Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Lijia Wang
- The State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, CAS University of Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
- School of Chemistry and Molecular Engineering East China Normal University 500 Dongchuan Rd. Shanghai 200241 China
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5
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Buschbeck-Alvarado ME, Hernández-Fernández G, Hernández-Trujillo J, Cortés-Guzmán F, Cuevas G. Charge transfer and electron localization as the origin of the anomeric effect in the O─C─O segment of dimethoxymethane and spiroketals. J PHYS ORG CHEM 2017. [DOI: 10.1002/poc.3793] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | | | | | | | - Gabriel Cuevas
- Instituto de Química; Universidad Nacional Autónoma de México; Ciudad de México Mexico
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6
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Hamama WS, Hassanien AEDE, Zoorob HH. Advanced Routes in Synthesis and Reactions of Lawsone Molecules (2-Hydroxynaphthalene-1,4-dione). J Heterocycl Chem 2017. [DOI: 10.1002/jhet.2855] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wafaa S. Hamama
- Chemistry Department, Faculty of Science; Mansoura University; El-Gomhoria Street ET-35516 Mansoura Egypt
| | - Alaa El-Din E. Hassanien
- Chemistry Department, Faculty of Science; Mansoura University; El-Gomhoria Street ET-35516 Mansoura Egypt
| | - Hanafi H. Zoorob
- Chemistry Department, Faculty of Science; Mansoura University; El-Gomhoria Street ET-35516 Mansoura Egypt
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7
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Plumbagin triggers DNA damage response, telomere dysfunction and genome instability of human breast cancer cells. Biomed Pharmacother 2016; 82:256-68. [DOI: 10.1016/j.biopha.2016.05.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 05/04/2016] [Accepted: 05/04/2016] [Indexed: 12/21/2022] Open
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8
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Li J, Peng H, Wang F, Wang X, Jiang H, Yin B. 2,5-Oxyarylation of Furans: Synthesis of Spiroacetals via Palladium-Catalyzed Aerobic Oxidative Coupling of Boronic Acids with α-Hydroxyalkylfurans. Org Lett 2016; 18:3226-9. [DOI: 10.1021/acs.orglett.6b01472] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jiuyi Li
- School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510641, China
| | - Hui Peng
- School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510641, China
| | - Furong Wang
- School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510641, China
| | - Xiujun Wang
- School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510641, China
| | - Huanfeng Jiang
- School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510641, China
| | - Biaolin Yin
- School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510641, China
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9
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10
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Xue J, Zhang H, Tian T, Yin K, Liu D, Jiang X, Li Y, Jin X, Yao X. Organohalogenite-Catalyzed Spiroketalization: Enantioselective Synthesis of Bisbenzannulated Spiroketal Cores. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500390] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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11
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Khomutnyk YY, Argüelles AJ, Winschel GA, Sun Z, Zimmerman PM, Nagorny P. Studies of the Mechanism and Origins of Enantioselectivity for the Chiral Phosphoric Acid-Catalyzed Stereoselective Spiroketalization Reactions. J Am Chem Soc 2015; 138:444-56. [DOI: 10.1021/jacs.5b12528] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yaroslav Ya. Khomutnyk
- Department of Chemistry, University of Michigan, 930 North University
Avenue, Ann Arbor, Michigan 48109, United States
| | - Alonso J. Argüelles
- Department of Chemistry, University of Michigan, 930 North University
Avenue, Ann Arbor, Michigan 48109, United States
| | - Grace A. Winschel
- Department of Chemistry, University of Michigan, 930 North University
Avenue, Ann Arbor, Michigan 48109, United States
| | - Zhankui Sun
- Department of Chemistry, University of Michigan, 930 North University
Avenue, Ann Arbor, Michigan 48109, United States
| | - Paul M. Zimmerman
- Department of Chemistry, University of Michigan, 930 North University
Avenue, Ann Arbor, Michigan 48109, United States
| | - Pavel Nagorny
- Department of Chemistry, University of Michigan, 930 North University
Avenue, Ann Arbor, Michigan 48109, United States
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12
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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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13
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Abstract
A short total synthesis, guided by biosynthetic considerations, of racemic merochlorin B is presented. The formation of its isomer, merochlorin A, was not observed under the conditions. Key steps include a directed ortho-metalation (DoM), a selective demethylation, an ortho-allylation, and an oxidative [3 + 2]-cycloaddition mediated by an iodine(III) reagent.
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Affiliation(s)
- Robin Meier
- Department of Chemistry and Center for Integrated Protein Science, University of Munich (LMU) , Butenandtstraße 5-13, 81377 München, Germany
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14
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Synthesis of 5,6- and 6,6-Spirocyclic Compounds. SYNTHESIS OF SATURATED OXYGENATED HETEROCYCLES I 2014. [DOI: 10.1007/978-3-642-41473-2_5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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15
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Peng Y, Xu XB, Xiao J, Wang YW. Nickel-mediated stereocontrolled synthesis of spiroketals via tandem cyclization–coupling of β-bromo ketals and aryl iodides. Chem Commun (Camb) 2014; 50:472-4. [DOI: 10.1039/c3cc47780k] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Borah P, Bhuyan PJ. Synthesis of some novel spiro substituted pyrido[2,3-c]coumarins by exploring ‘tertiary amino effect’ reaction strategy. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.10.055] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Zhu HT, Wang J, Qiu ZH, Wang LJ, Zhong MJ, Liu XY, Liang YM. Electrophile-Promoted Tandem Cyclization of α,β-Diynyl Ketodiols: A Facile Synthesis of Tetrahalogenated Spiroketals. ASIAN J ORG CHEM 2013. [DOI: 10.1002/ajoc.201300202] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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18
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Aitken HRM, Furkert DP, Hubert JG, Wood JM, Brimble MA. Enantioselective access to benzannulated spiroketals using a chiral sulfoxide auxiliary. Org Biomol Chem 2013; 11:5147-55. [DOI: 10.1039/c3ob41065j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Chang S, Britton R. Enantioselective synthesis of spiroacetals via silver(I)-promoted alkylation of hemiacetals: total synthesis of cephalosporolides E and F. Org Lett 2012; 14:5844-7. [PMID: 23145960 DOI: 10.1021/ol302694s] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A silver(I)-promoted intramolecular hemiacetal alkylation has been developed that converts readily available keto-chlorodiols into functionalized spiroacetals containing 5,5-, 5,6-, and 5,7-membered ring systems. The efficiency of this process is demonstrated in a concise total synthesis of the fungal metabolites cephalosporolides E and F.
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Affiliation(s)
- Stanley Chang
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada
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20
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Sun Z, Winschel GA, Borovika A, Nagorny P. Chiral Phosphoric Acid-Catalyzed Enantioselective and Diastereoselective Spiroketalizations. J Am Chem Soc 2012; 134:8074-7. [DOI: 10.1021/ja302704m] [Citation(s) in RCA: 165] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhankui Sun
- Chemistry Department, University of Michigan, Ann Arbor, Michigan 48109,
United States
| | - Grace A. Winschel
- Chemistry Department, University of Michigan, Ann Arbor, Michigan 48109,
United States
| | - Alina Borovika
- Chemistry Department, University of Michigan, Ann Arbor, Michigan 48109,
United States
| | - Pavel Nagorny
- Chemistry Department, University of Michigan, Ann Arbor, Michigan 48109,
United States
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21
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Green JC, Burnett GL, Pettus TRR. New strategies for natural products containing chroman spiroketals. ACTA ACUST UNITED AC 2012; 84:1621-1631. [PMID: 25554712 DOI: 10.1351/pac-con-11-10-34] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Two cycloaddition strategies are described that lead to various chroman spiroketals from assorted exocyclic enol ethers. Unlike conventional thermodynamic ketalization strategies, the stereochemical outcome for this approach is determined by a kinetic cycloaddition reaction. Thus, the stereochemical outcome reflects the olefin geometry of the starting materials along with the orientation of the associated transition state. However, the initial kinetic product can also be equilibrated by acid catalysis and reconstituted into a thermodynamic stereochemical arrangement. Thus, these strategies uniquely enable synthetic access to either the thermodynamic or kinetic conformation of the spiroketal stereocenter itself. Applications of these strategies in the syntheses of berkelic acid, β-rubromycin, and paecilospirone are presented along with the use of a chroman spiroketal for the construction of heliespirones A and C.
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Affiliation(s)
- Jason C Green
- Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA 93106-9510, USA
| | - G Leslie Burnett
- Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA 93106-9510, USA
| | - Thomas R R Pettus
- Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA 93106-9510, USA
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22
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Cohn EPMT, Wu KL, Pettus TRR, Reich NO. A New Strategy for Detection and Development of Tractable Telomerase Inhibitors. J Med Chem 2012; 55:3678-86. [DOI: 10.1021/jm201191d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Elysia P. M. T. Cohn
- Department of Chemistry
and Biochemistry, University of California, Santa Barbara, California
93106, United States
| | - Kun-Liang Wu
- Department of Chemistry
and Biochemistry, University of California, Santa Barbara, California
93106, United States
| | - Thomas R. R. Pettus
- Department of Chemistry
and Biochemistry, University of California, Santa Barbara, California
93106, United States
| | - Norbert O. Reich
- Department of Chemistry
and Biochemistry, University of California, Santa Barbara, California
93106, United States
- Program
in Biomolecular Science and Engineering, University of California,
Santa Barbara, California 93106, United States
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23
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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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24
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Iwasaki H, Tsutsui N, Eguchi T, Ohno H, Yamashita M, Tanaka T. A novel samarium(II)-mediated tandem spirocyclization onto an aromatic ring. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.02.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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25
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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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26
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Sperry J, Wilson ZE, Rathwell DCK, Brimble MA. Isolation, biological activity and synthesis of benzannulated spiroketal natural products. Nat Prod Rep 2010; 27:1117-37. [DOI: 10.1039/b911514p] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Liu G, Wurst JM, Tan DS. Stereoselective synthesis of benzannulated spiroketals: influence of the aromatic ring on reactivity and conformation. Org Lett 2009; 11:3670-3. [PMID: 19634891 PMCID: PMC2760470 DOI: 10.1021/ol901437f] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A systematic stereocontrolled synthesis of benzannulated spiroketals has been developed, using kinetic spirocyclization reactions of glycal epoxides, leading to a new AcOH-induced cyclization and valuable insights into the reactivity and conformations of these systems. One stereochemical series accommodates axial positioning of the aromatic ring while another adopts an alternative (1)C(4) chair conformation to avoid it. Equatorial aromatic rings also participate in nonobvious steric interactions that impact thermodynamic stability. A discovery library of 68 benzannulated spiroketals with systematic variations in stereochemistry, ring size, and positioning of the aromatic substituent has been synthesized for broad biological evaluation.
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Affiliation(s)
- Guodong Liu
- Molecular Pharmacology & Chemistry Program, Memorial Sloan–Kettering Cancer Center, 1275 York Avenue, Box 422, New York, New York 10065
| | - Jacqueline M. Wurst
- Tri-Institutional Training Program in Chemical Biology, and Tri-Institutional Research Program, Memorial Sloan–Kettering Cancer Center, 1275 York Avenue, Box 422, New York, New York 10065
| | - Derek S. Tan
- Molecular Pharmacology & Chemistry Program, Memorial Sloan–Kettering Cancer Center, 1275 York Avenue, Box 422, New York, New York 10065
- Tri-Institutional Training Program in Chemical Biology, and Tri-Institutional Research Program, Memorial Sloan–Kettering Cancer Center, 1275 York Avenue, Box 422, New York, New York 10065
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Iwasaki H, Eguchi T, Tsutsui N, Ohno H, Tanaka T. Samarium(II)-Mediated Spirocyclization by Intramolecular Aryl Radical Addition onto an Aromatic Ring. J Org Chem 2008; 73:7145-52. [DOI: 10.1021/jo800656a] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroki Iwasaki
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Toru Eguchi
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Nozomi Tsutsui
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hiroaki Ohno
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Tetsuaki Tanaka
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
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Marsini MA, Huang Y, Lindsey CC, Wu KL, Pettus TRR. Diastereoselective syntheses of chroman spiroketals via [4 + 2] cycloaddition of enol ethers and o-quinone methides. Org Lett 2008; 10:1477-80. [PMID: 18336038 DOI: 10.1021/ol8003244] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A variety of chroman spiroketals are synthesized via inverse-demand [4 + 2] cycloaddition of enol ethers and ortho-quinone methides (o-QMs). Low temperature o-QM generation in situ allows for the kinetic, diastereoselective construction of these motifs, providing entry to a number of unusual chroman spiroketal natural products.
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Affiliation(s)
- Maurice A Marsini
- Department of Chemistry and Biochemistry, University of California at Santa Barbara Santa Barbara, California 93106-9510, USA
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