1
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Seenadera SD, Long SA, Akee R, Bermudez G, Parsonage G, Strope J, Peer C, Figg WD, Parker KA, Beech DJ, Beutler JA. Biological Effects of Modifications of the Englerin A Glycolate. ACS Med Chem Lett 2022; 13:1472-1476. [PMID: 36105325 PMCID: PMC9465829 DOI: 10.1021/acsmedchemlett.2c00258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 08/15/2022] [Indexed: 11/30/2022] Open
Abstract
Modifications at the glycolate moiety of englerin A were made to explore variations at the most sensitive site on the molecule for activity in the NCI 60 screen, wherein englerin A is highly potent and selective for renal cancer cells. Replacement of the glycolate by other functionalities as well as esterification of the glycolate hydroxyl yielded compounds which displayed excellent selectivity and potency compared with the natural product. TRPC4/5 ion channel experiments with five compounds showed delayed or reduced agonism with TRPC5, at much higher concentrations than englerin A. With TRPC4, these compounds all had no effect at 10 μM. The same compounds were not detectable in mouse serum after a single oral dose of 12.5 mg/kg. At 100 mg/kg p.o., no toxicity was observed, and blood levels were barely detectable. Intravenous administration led to toxicity but at substantially lower doses than for englerin A.
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Affiliation(s)
- Sarath
P. D. Seenadera
- Molecular
Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702 United States
| | - Sarah A. Long
- Molecular
Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702 United States
| | - Rhone Akee
- Leidos
Biomedical, FNLCR, Frederick, Maryland 21702 United States
| | - Gabriela Bermudez
- Department
of Chemistry, Stony Brook University, Stony Brook, New York 11790 United States
| | | | - Jonathan Strope
- Genitourinary
Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892 United States
| | - Cody Peer
- Genitourinary
Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892 United States
| | - W. Douglas Figg
- Genitourinary
Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892 United States
| | - Kathlyn A. Parker
- Department
of Chemistry, Stony Brook University, Stony Brook, New York 11790 United States
| | - David J. Beech
- School
of Medicine, University of Leeds, Leeds, LS2 9JT U.K.
| | - John A. Beutler
- Molecular
Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702 United States
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2
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Liu Z, Yang Y, Jiang X, Song Q, Zanoni G, Liu S, Bi X. Dearomative [4 + 3] cycloaddition of furans with vinyl- N-triftosylhydrazones by silver catalysis: stereoselective access to oxa-bridged seven-membered bicycles. Org Chem Front 2022. [DOI: 10.1039/d2qo00256f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A practical dearomative [4 + 3] cycloaddition of furans with vinylcarbenes to access oxa-bridged seven-membered carbocycles, with complete and predictable stereoselectivity, is achieved by merging silver catalysis and vinyl-N-triftosylhydrazones.
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Affiliation(s)
- Zhaohong Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yong Yang
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Xinyu Jiang
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Qingmin Song
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Giuseppe Zanoni
- Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100, Pavia, Italy
| | - Shaopeng Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Xihe Bi
- Department of Chemistry, Northeast Normal University, Changchun 130024, China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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3
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Kumar Palli K, Reddy Anugu R, Chandrasekhar S. Total Synthesis of (−)‐4‐
epi
‐Englerin A. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kishore Kumar Palli
- Department of Organic Synthesis and Process Chemistry CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Raghunath Reddy Anugu
- Department of Organic Synthesis and Process Chemistry CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Srivari Chandrasekhar
- Department of Organic Synthesis and Process Chemistry CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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4
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Wu Z, Suppo JS, Tumova S, Strope J, Bravo F, Moy M, Weinstein ES, Peer CJ, Figg WD, Chain WJ, Echavarren AM, Beech DJ, Beutler JA. Bridgehead Modifications of Englerin A Reduce TRPC4 Activity and Intravenous Toxicity but not Cell Growth Inhibition. ACS Med Chem Lett 2020; 11:1711-1716. [PMID: 32944138 DOI: 10.1021/acsmedchemlett.0c00186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 08/03/2020] [Indexed: 11/29/2022] Open
Abstract
Modifications at the bridgehead position of englerin A were made to explore the effects of variation at this site on the molecule for biological activity, as judged by the NCI 60 screen, in which englerin A is highly potent and selective for renal cancer cells. Replacement of the isopropyl group by other, larger substituents yielded compounds which displayed excellent selectivity and potency comparable to the natural product. Selected compounds were also evaluated for their effect on the ion channel TRPC4 as well as for intravenous toxicity in mice, and these had lower potency in both assays compared to englerin A.
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Affiliation(s)
- Zhenhua Wu
- Department of Chemistry & Biochemistry, University of Delaware, 163 The Green, Newark, Delaware 19716, United States
| | - Jean-Simon Suppo
- Institute of Chemical Research of Catalonia (ICIQ), 43007 Tarragona, Spain
| | - Sarka Tumova
- School of Medicine, University of Leeds, Leeds LS2 9JT, U.K
| | - Jonathan Strope
- Genitourinary Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892, United States
| | - Fernando Bravo
- Institute of Chemical Research of Catalonia (ICIQ), 43007 Tarragona, Spain
| | - Melody Moy
- Department of Chemistry & Biochemistry, University of Delaware, 163 The Green, Newark, Delaware 19716, United States
| | - Ethan S. Weinstein
- Department of Chemistry & Biochemistry, University of Delaware, 163 The Green, Newark, Delaware 19716, United States
| | - Cody J. Peer
- Genitourinary Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892, United States
| | - William D. Figg
- Genitourinary Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892, United States
| | - William J. Chain
- Department of Chemistry & Biochemistry, University of Delaware, 163 The Green, Newark, Delaware 19716, United States
| | | | - David J. Beech
- School of Medicine, University of Leeds, Leeds LS2 9JT, U.K
| | - John A. Beutler
- Molecular Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
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5
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Reagan C, Trevitt G, Tchabanenko K. Total Synthesis of (±)-Englerin A and Its Tuncated Analogues. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801544] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Colleen Reagan
- School of Chemistry and Chemical Engineering; Queen's University Belfast; David Keir Building BT9 5AG Belfast United Kingdom
| | - Graham Trevitt
- Almac Discovery Ltd.; Almac House, 20 Seagoe Industrial Estate BT63 5QD Craigavon United Kingdom
| | - Kirill Tchabanenko
- School of Chemistry and Chemical Engineering; Queen's University Belfast; David Keir Building BT9 5AG Belfast United Kingdom
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6
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Liu P, Cui Y, Chen K, Zhou X, Pan W, Ren J, Wang Z. Total Syntheses of (−)-Englerins A/B, (+)-Orientalols E/F, and (−)-Oxyphyllol. Org Lett 2018; 20:2517-2521. [DOI: 10.1021/acs.orglett.8b00552] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Pengcai Liu
- State Key Laboratory of Elemento-Organic Chemistry, Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, 94 Weijin Road, Tianjin 300071, PR China
| | - Yutao Cui
- State Key Laboratory of Elemento-Organic Chemistry, Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, 94 Weijin Road, Tianjin 300071, PR China
| | - Kang Chen
- State Key Laboratory of Elemento-Organic Chemistry, Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, 94 Weijin Road, Tianjin 300071, PR China
| | - Xinyue Zhou
- State Key Laboratory of Elemento-Organic Chemistry, Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, 94 Weijin Road, Tianjin 300071, PR China
| | - Wenyan Pan
- State Key Laboratory of Elemento-Organic Chemistry, Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, 94 Weijin Road, Tianjin 300071, PR China
| | - Jun Ren
- State Key Laboratory of Elemento-Organic Chemistry, Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, 94 Weijin Road, Tianjin 300071, PR China
| | - Zhongwen Wang
- State Key Laboratory of Elemento-Organic Chemistry, Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, 94 Weijin Road, Tianjin 300071, PR China
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7
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Yin Z, He Y, Chiu P. Application of (4+3) cycloaddition strategies in the synthesis of natural products. Chem Soc Rev 2018; 47:8881-8924. [DOI: 10.1039/c8cs00532j] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This review summarizes the applications of (4+3) cycloadditions, both classical and formal, in the syntheses of natural products in the last two decades.
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Affiliation(s)
- Zengsheng Yin
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- P. R. China
| | - Yun He
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- P. R. China
| | - Pauline Chiu
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- P. R. China
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8
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Cheng QQ, Deng Y, Lankelma M, Doyle MP. Cycloaddition reactions of enoldiazo compounds. Chem Soc Rev 2017; 46:5425-5443. [PMID: 28726896 PMCID: PMC5575991 DOI: 10.1039/c7cs00324b] [Citation(s) in RCA: 193] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Enoldiazo esters and amides have proven to be versatile reagents for cycloaddition reactions that allow highly efficient construction of various carbocycles and heterocycles. Their versatility is exemplified by (1) [2+n]-cycloadditions (n = 3, 4) by the enol silyl ether units of enoldiazo compounds with retention of the diazo functionality to furnish α-cyclic-α-diazo compounds that are themselves subject to further transformations of the diazo functional group; (2) [3+n]-cycloadditions (n = 1-5) by metallo-enolcarbenes formed by catalytic dinitrogen extrusion from enoldiazo compounds; (3) [2+n]-cycloadditions (n = 3, 4) by donor-acceptor cyclopropenes generated in situ from enoldiazo compounds that produce cyclopropane-fused ring systems. The role of dirhodium(ii) and the emergence of copper(i) catalysts are described, as are the different outcomes of reactions initiated with these catalysts. This comprehensive review on cycloaddition reactions of enoldiazo compounds, with emphasis on methodology development, mechanistic insight, and catalyst-controlled chemodivergence, aims to provide inspiration for future discoveries in the field and to catalyze the application of enoldiazo reagents by the wider synthetic community.
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Affiliation(s)
- Qing-Qing Cheng
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, USA.
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9
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Wu Z, Zhao S, Fash DM, Li Z, Chain WJ, Beutler JA. Englerins: A Comprehensive Review. JOURNAL OF NATURAL PRODUCTS 2017; 80:771-781. [PMID: 28170253 PMCID: PMC6198806 DOI: 10.1021/acs.jnatprod.6b01167] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In the decade since the discovery of englerin A (1) and its potent activity in cancer models, this natural product and its analogues have been the subject of numerous chemical, biological, and preclinical studies by many research groups. This review summarizes published findings and proposes further research directions required for entry of an englerin analogue into clinical trials for kidney cancer and other conditions.
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Affiliation(s)
- Zhenhua Wu
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Senzhi Zhao
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - David M. Fash
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Zhenwu Li
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - William J. Chain
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - John A. Beutler
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
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10
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Batova A, Altomare D, Creek KE, Naviaux RK, Wang L, Li K, Green E, Williams R, Naviaux JC, Diccianni M, Yu AL. Englerin A induces an acute inflammatory response and reveals lipid metabolism and ER stress as targetable vulnerabilities in renal cell carcinoma. PLoS One 2017; 12:e0172632. [PMID: 28296891 PMCID: PMC5351975 DOI: 10.1371/journal.pone.0172632] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 02/06/2017] [Indexed: 12/14/2022] Open
Abstract
Renal cell carcinoma (RCC) is among the top ten most common forms of cancer and is the most common malignancy of the kidney. Clear cell renal carcinoma (cc-RCC), the most common type of RCC, is one of the most refractory cancers with an incidence that is on the rise. Screening of plant extracts in search of new anti-cancer agents resulted in the discovery of englerin A, a guaiane sesquiterpene with potent cytotoxicity against renal cancer cells and a small subset of other cancer cells. Though a few cellular targets have been identified for englerin A, it is still not clear what mechanisms account for the cytotoxicity of englerin A in RCC, which occurs at concentrations well below those used to engage the targets previously identified. Unlike any prior study, the current study used a systems biology approach to explore the mechanism(s) of action of englerin A. Metabolomics analyses indicated that englerin A profoundly altered lipid metabolism by 24 h in cc-RCC cell lines and generated significant levels of ceramides that were highly toxic to these cells. Microarray analyses determined that englerin A induced ER stress signaling and an acute inflammatory response, which was confirmed by quantitative PCR and Western Blot analyses. Additionally, fluorescence confocal microscopy revealed that englerin A at 25 nM disrupted the morphology of the ER confirming the deleterious effect of englerin A on the ER. Collectively, our findings suggest that cc-RCC is highly sensitive to disruptions in lipid metabolism and ER stress and that these vulnerabilities can be targeted for the treatment of cc-RCC and possibly other lipid storing cancers. Furthermore, our results suggest that ceramides may be a mediator of some of the actions of englerin A. Lastly, the acute inflammatory response induced by englerin A may mediate anti-tumor immunity.
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Affiliation(s)
- Ayse Batova
- Department of Pediatrics, University of California, San Diego, California, United States of America
- * E-mail:
| | - Diego Altomare
- Department of Drug Discovery and Biomedical Sciences, South Carolina College of Pharmacy, University of South Carolina, Columbia, South Carolina, United States of America
| | - Kim E. Creek
- Department of Drug Discovery and Biomedical Sciences, South Carolina College of Pharmacy, University of South Carolina, Columbia, South Carolina, United States of America
| | - Robert K. Naviaux
- Department of Pediatrics, University of California, San Diego, California, United States of America
- The Mitochondrial and Metabolic Disease Center, Department of Pathology, University of California, San Diego, San Diego, California, United States of America
- Department of Medicine, University of California, San Diego, California, United States of America
| | - Lin Wang
- The Mitochondrial and Metabolic Disease Center, Department of Pathology, University of California, San Diego, San Diego, California, United States of America
| | - Kefeng Li
- The Mitochondrial and Metabolic Disease Center, Department of Pathology, University of California, San Diego, San Diego, California, United States of America
| | - Erica Green
- Department of Drug Discovery and Biomedical Sciences, South Carolina College of Pharmacy, University of South Carolina, Columbia, South Carolina, United States of America
| | - Richard Williams
- Department of Pediatrics, University of California, San Diego, California, United States of America
| | - Jane C. Naviaux
- The Mitochondrial and Metabolic Disease Center, Department of Pathology, University of California, San Diego, San Diego, California, United States of America
| | - Mitchell Diccianni
- Department of Pediatrics, University of California, San Diego, California, United States of America
| | - Alice L. Yu
- Department of Pediatrics, University of California, San Diego, California, United States of America
- Institute of Stem Cell and Translational Cancer Research, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
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11
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Gu Y, Huang J, Gong J, Yang Z. Total synthesis of orientalol F via gold-catalyzed cycloisomerization of alkynediol. Org Chem Front 2017. [DOI: 10.1039/c7qo00654c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The total synthesis of orientalol F was accomplished in 13 steps using gold-catalyzed tandem cycloisomerization of alkynediol as a key step.
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Affiliation(s)
- Yueqing Gu
- Laboratory of Chemical Genomics
- School of Chemical Biology and Biotechnology
- Peking University Shenzhen Graduate School
- Shenzhen 518055
- China
| | - Jun Huang
- Laboratory of Chemical Genomics
- School of Chemical Biology and Biotechnology
- Peking University Shenzhen Graduate School
- Shenzhen 518055
- China
| | - Jianxian Gong
- Laboratory of Chemical Genomics
- School of Chemical Biology and Biotechnology
- Peking University Shenzhen Graduate School
- Shenzhen 518055
- China
| | - Zhen Yang
- Laboratory of Chemical Genomics
- School of Chemical Biology and Biotechnology
- Peking University Shenzhen Graduate School
- Shenzhen 518055
- China
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12
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Nelson R, Gulías M, Mascareñas JL, López F. Concise, Enantioselective, and Versatile Synthesis of (-)-Englerin A Based on a Platinum-Catalyzed [4C+3C] Cycloaddition of Allenedienes. Angew Chem Int Ed Engl 2016; 55:14359-14363. [PMID: 27735111 DOI: 10.1002/anie.201607348] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Indexed: 01/01/2023]
Abstract
A practical synthesis of (-)-englerin A was accomplished in 17 steps and 11 % global yield from commercially available achiral precursors. The key step consists of a platinum-catalyzed [4C+3C] allenediene cycloaddition that directly delivers the trans-fused guaiane skeleton with complete diastereoselectivity. The high enantioselectivity (99 % ee) stems from an asymmetric ruthenium-catalyzed transfer hydrogenation of a readily assembled diene-ynone. The synthesis also features a highly stereoselective oxygenation, and a late-stage cuprate alkylation that enables the preparation of previously inaccessible structural analogues.
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Affiliation(s)
- Ronald Nelson
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Moisés Gulías
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - José L Mascareñas
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Fernando López
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain. .,Instituto de Química Orgánica General (CSIC), Juan de la Cierva, 3, 28006, Madrid, Spain.
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13
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Nelson R, Gulías M, Mascareñas JL, López F. Concise, Enantioselective, and Versatile Synthesis of (−)-Englerin A Based on a Platinum-Catalyzed [4C+3C] Cycloaddition of Allenedienes. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607348] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ronald Nelson
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Moisés Gulías
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - José L. Mascareñas
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Fernando López
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
- Instituto de Química Orgánica General (CSIC); Juan de la Cierva, 3 28006 Madrid Spain
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14
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Simeonov SP, Nunes JPM, Guerra K, Kurteva VB, Afonso CAM. Synthesis of Chiral Cyclopentenones. Chem Rev 2016; 116:5744-893. [DOI: 10.1021/cr500504w] [Citation(s) in RCA: 159] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Svilen P. Simeonov
- Institute
of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str, bl.9, 1113 Sofia, Bulgaria
| | - João P. M. Nunes
- Department
of Chemistry, University College London, London WC1H 0AJ, United Kingdom
| | - Krassimira Guerra
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Vanya B. Kurteva
- Institute
of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str, bl.9, 1113 Sofia, Bulgaria
| | - Carlos A. M. Afonso
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
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15
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Krainz T, Chow S, Korica N, Bernhardt PV, Boyle GM, Parsons PG, Davies HML, Williams CM. Rhodium-Catalyzed [4+3] Cycloaddition to Furans: Direct Access to Functionalized Bicyclo[5.3.0]decane Derivatives. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501271] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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16
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Kusama H, Tazawa A, Ishida K, Iwasawa N. Total Synthesis of (±)-Englerin A Using An Intermolecular [3+2] Cycloaddition Reaction of Platinum-Containing Carbonyl Ylide. Chem Asian J 2015; 11:64-7. [DOI: 10.1002/asia.201500935] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Hiroyuki Kusama
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
- Department of Chemistry; Faculty of Science; Gakushuin University; 1-5-1 Mejiro, Toshima-ku Tokyo 171-8588 Japan
| | - Aoi Tazawa
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
| | - Kento Ishida
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
- Department of Chemistry; Faculty of Science; Gakushuin University; 1-5-1 Mejiro, Toshima-ku Tokyo 171-8588 Japan
| | - Nobuharu Iwasawa
- Department of Chemistry; Tokyo Institute of Technology; 2-12-1 O-okayama, Meguro-ku Tokyo 152-8551 Japan
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Hanari T, Shimada N, Kurosaki Y, Thrimurtulu N, Nambu H, Anada M, Hashimoto S. Asymmetric Total Synthesis of (−)-Englerin A through Catalytic Diastereo- and Enantioselective Carbonyl Ylide Cycloaddition. Chemistry 2015; 21:11671-6. [DOI: 10.1002/chem.201502009] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Indexed: 12/20/2022]
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18
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Fuse S, Yoshida H, Oosumi K, Takahashi T. Rapid and Structurally Diverse Synthesis of Multi-Substituted β-Keto Amide Derivatives Based on a Dioxinone Scaffold. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402478] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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Williams RT, Yu AL, Diccianni MB, Theodorakis EA, Batova A. Renal cancer-selective Englerin A induces multiple mechanisms of cell death and autophagy. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2013; 32:57. [PMID: 23958461 PMCID: PMC3765946 DOI: 10.1186/1756-9966-32-57] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 08/08/2013] [Indexed: 12/28/2022]
Abstract
Renal cell carcinoma (RCC), the most common malignancy of the kidney, is refractory to standard therapy and has an incidence that continues to rise. Screening of plant extracts in search of new agents to treat RCC resulted in the discovery of englerin A (EA), a natural product exhibiting potent selective cytotoxicity against renal cancer cells. Despite the establishment of synthetic routes to the synthesis of EA, very little is known about its mechanism of action. The results of the current study demonstrate for the first time that EA induces apoptosis in A498 renal cancer cells in addition to necrosis. The induction of apoptosis by EA required at least 24 h and was caspase independent. In addition, EA induced increased levels of autophagic vesicles in A498 cells which could be inhibited by nonessential amino acids (NEAA), known inhibitors of autophagy. Interestingly, inhibition of autophagy by NEAA did not diminish cell death suggesting that autophagy is not a cell death mechanism and likely represents a cell survival mechanism which ultimately fails. Apart from cell death, our results demonstrated that cells treated with EA accumulated in the G2 phase of the cell cycle indicating a block in G2/M transition. Moreover, our results determined that EA inhibited the activation of both AKT and ERK, kinases which are activated in cancer and implicated in unrestricted cell proliferation and induction of autophagy. The phosphorylation status of the cellular energy sensor, AMPK, appeared unaffected by EA. The high renal cancer selectivity of EA combined with its ability to induce multiple mechanisms of cell death while inhibiting pathways driving cell proliferation, suggest that EA is a highly unique agent with great potential as a therapeutic lead for the treatment of RCC.
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Affiliation(s)
- Richard T Williams
- Department of Chemistry and Biochemistry, University of California, 9500 Gilman Drive, La Jolla, CA 92093, USA.
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20
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Abstract
This review covers the isolation, structural determination, synthesis and chemical and microbiological transformations of natural sesquiterpenoids. The literature from January to December 2012 is reviewed, and 471 references are cited.
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Affiliation(s)
- Braulio M Fraga
- Instituto de Productos Naturales y Agrobiología, CSIC, 38206-La Laguna, Tenerife, Canary Islands, Spain
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21
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Priebbenow DL, Zou LH, Becker P, Bolm C. The Disubstitution of Acetals to Prepare δ,δ-Bis(aryl) β-Keto Esters. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300446] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Zahel M, Keßberg A, Metz P. Eine kurze enantioselektive Totalsynthese von (−)-Englerin A. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301247] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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23
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Zahel M, Keßberg A, Metz P. A Short Enantioselective Total Synthesis of (−)-Englerin A. Angew Chem Int Ed Engl 2013; 52:5390-2. [DOI: 10.1002/anie.201301247] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Indexed: 11/08/2022]
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24
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Wang J, Chen SG, Sun BF, Lin GQ, Shang YJ. Collective Total Synthesis of Englerin A and B, Orientalol E and F, and Oxyphyllol: Application of the Organocatalytic [4+3] Cycloaddition Reaction. Chemistry 2013; 19:2539-47. [DOI: 10.1002/chem.201203467] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Indexed: 11/06/2022]
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25
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Sulzmaier FJ, Li Z, Nakashige ML, Fash DM, Chain WJ, Ramos JW. Englerin a selectively induces necrosis in human renal cancer cells. PLoS One 2012; 7:e48032. [PMID: 23144724 PMCID: PMC3481555 DOI: 10.1371/journal.pone.0048032] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Accepted: 09/26/2012] [Indexed: 12/19/2022] Open
Abstract
The number of renal cancers has increased over the last ten years and patient survival in advanced stages remains very poor. Therefore, new therapeutic approaches for renal cancer are essential. Englerin A is a natural product with a very potent and selective cytotoxicity against renal cancer cells. This makes it a promising drug candidate that may improve current treatment standards for patients with renal cancers in all stages. However, little is known about englerin A's mode of action in targeting specifically renal cancer cells. Our study is the first to investigate the biological mechanism of englerin A action in detail. We report that englerin A is specific for renal tumor cells and does not affect normal kidney cells. We find that englerin A treatment induces necrotic cell death in renal cancer cells but not in normal kidney cells. We further show that autophagic and pyroptotic proteins are unaffected by the compound and that necrotic signaling in these cells coincided with production of reactive oxygen species and calcium influx into the cytoplasm. As the first study to analyze the biological effects of englerin A, our work provides an important basis for the evaluation and validation of the compound's use as an anti-tumor drug. It also provides a context in which to identify the specific target or targets of englerin A in renal cancer cells.
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Affiliation(s)
- Florian J. Sulzmaier
- Cancer Biology Program, University of Hawaii
Cancer Center, University of Hawaii at Manoa, Honolulu, Hawaii, United States of
America
- Department of Molecular Biosciences and
Bioengineering, University of Hawaii at Manoa, Honolulu, Hawaii, United States
of America
| | - Zhenwu Li
- Department of Chemistry, University of Hawaii
at Manoa, Honolulu, Hawaii, United States of America
| | - Mika L. Nakashige
- Department of Chemistry, University of Hawaii
at Manoa, Honolulu, Hawaii, United States of America
| | - David M. Fash
- Department of Chemistry, University of Hawaii
at Manoa, Honolulu, Hawaii, United States of America
| | - William J. Chain
- Cancer Biology Program, University of Hawaii
Cancer Center, University of Hawaii at Manoa, Honolulu, Hawaii, United States of
America
- Department of Chemistry, University of Hawaii
at Manoa, Honolulu, Hawaii, United States of America
| | - Joe W. Ramos
- Cancer Biology Program, University of Hawaii
Cancer Center, University of Hawaii at Manoa, Honolulu, Hawaii, United States of
America
- Department of Molecular Biosciences and
Bioengineering, University of Hawaii at Manoa, Honolulu, Hawaii, United States
of America
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26
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Gao P, Cook SP. A Reductive-Heck Approach to the Hydroazulene Ring System: A Formal Synthesis of the Englerins. Org Lett 2012; 14:3340-3. [DOI: 10.1021/ol3013167] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peng Gao
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405-7102, United States
| | - Silas P. Cook
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405-7102, United States
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27
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Lee J, Parker KA. A formal synthesis of (-)-englerin A by relay ring closing metathesis and transannular etherification. Org Lett 2012; 14:2682-5. [PMID: 22564056 DOI: 10.1021/ol3007524] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A bicyclization approach to englerin A has culminated in a formal asymmetric total synthesis. Key transformations in the 10-step sequence are a regiospecific epoxide opening and a relay ene-yne-ene metathesis that converts linear substrates specifically to Δ(4,6)-guaiadiene-9,10 diol derivatives. Regiospecific functionalization of the diene moiety installs the oxygen bridge required for the englerin tricyclic core.
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Affiliation(s)
- Jungyong Lee
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11733, USA
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