1
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Wang C, He J, Mei H, Makarem A, Han J. Visible-Light-Triggered Difluoroacetylation/Cyclization of Chromone-Tethered Alkenes Enabling Synthesis of Tetrahydroxanthones. J Org Chem 2024; 89:5619-5633. [PMID: 38581081 DOI: 10.1021/acs.joc.4c00129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2024]
Abstract
Hydroxanthones have attracted considerable attention due to their significance in organic and biological chemistry, yet their synthesis remains a great challenge. In this study, a series of chromone-tethered alkenes are designed, and a radical cyclization reaction of these chromone derivatives has been achieved under photoredox conditions. The reaction uses bromodifluoroacetamides or bromodifluoroacetates as coupling partners, affording a broad range of functionalized tetrahydroxanthone products with up to 85% yields. The reaction is triggered via the generation of difluoroacetate radicals or alkene radical cations with fac-Ir(ppy)3 or 2,3,5,6-tetrakis(carbazol-9-yl)-1,4-dicyanobenzene as a photocatalyst. This approach offers access to various tetrahydroxanthone derivatives from readily available starting materials and enriches the research content of heteroarene-tethered alkenes.
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Affiliation(s)
- Chengting Wang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Jingrui He
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Haibo Mei
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Ata Makarem
- Department of Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany
| | - Jianlin Han
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
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2
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Jia J, Wang Y, Zhou Q, Chen R, Chen X. Formal Synthesis of Ecteinascidin 743 from N-Cbz-l-tyrosine. J Org Chem 2023. [PMID: 37463501 DOI: 10.1021/acs.joc.3c00931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
A formal total synthesis of ecteinascidin 743 and lurbinectedin is achieved. Key features involve a Pictet-Spengler cyclization coupling of the tetrahydroisoquinoline and phenylalaninol moieties prepared by a common route with high yield and selectivity, a Parikh-Doering oxidation with good chemoselectivity and functionality tolerance, and a light-mediated A-ring elaboration of pentacyclic methoxyquinone substrates. By the approach, the known advanced intermediate (4-step conversion to Et-743) can be obtained conveniently in 21 total steps from N-Cbz-l-tyrosine.
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Affiliation(s)
- Junhao Jia
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, PR China
| | - Yue Wang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, PR China
| | - Qin Zhou
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, PR China
| | | | - Xiaochuan Chen
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, PR China
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3
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Kong L, Deng Z, You D. Chemistry and biosynthesis of bacterial polycyclic xanthone natural products. Nat Prod Rep 2022; 39:2057-2095. [PMID: 36083257 DOI: 10.1039/d2np00046f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Covering: up to the end of 2021Bacterial polycyclic xanthone natural products (BPXNPs) are a growing family of natural xanthones featuring a pentangular architecture with various modifications to the tricyclic xanthone chromophore. Their structural diversities and various activities have fueled biosynthetic and chemical synthetic studies. Moreover, their more potent activities than the clinically used drugs make them potential candidates for the treatment of diseases. Future unraveling of structure activity relationships (SARs) will provide new options for the (bio)-synthesis of drug analogues with higher activities. This review summarizes the isolation, structural elucidation and biological activities and more importantly, the recent strategies for the microbial biosynthesis and chemical synthesis of BPXNPs. Regarding their biosynthesis, we discuss the recent progress in enzymes that synthesize tricyclic xanthone, the protein candidates for structural moieties (methylene dioxygen bridge and nitrogen heterocycle), tailoring enzymes for methylation and halogenation. The chemical synthesis part summarizes the recent methodology for the division synthesis and coupling construction of achiral molecular skeletons. Ultimately, perspectives on the biosynthetic study of BPXNPs are discussed.
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Affiliation(s)
- Lingxin Kong
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Zixin Deng
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Delin You
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
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4
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Wang FX, Yan JL, Liu Z, Zhu T, Liu Y, Ren SC, Lv WX, Jin Z, Chi YR. Assembly of multicyclic isoquinoline scaffolds from pyridines: formal total synthesis of fredericamycin A. Chem Sci 2021; 12:10259-10265. [PMID: 34377413 PMCID: PMC8336465 DOI: 10.1039/d1sc02442f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 06/26/2021] [Indexed: 11/21/2022] Open
Abstract
The construction of an isoquinoline skeleton typically starts with benzene derivatives as substrates with the assistance of acids or transition metals. Disclosed here is a concise approach to prepare isoquinoline analogues by starting with pyridines to react with β-ethoxy α,β-unsaturated carbonyl compounds under basic conditions. Multiple substitution patterns and a relatively large number of functional groups (including those sensitive to acidic conditions) can be tolerated in our method. In particular, our protocol allows for efficient access to tricyclic isoquinolines found in hundreds of natural products with interesting bioactivities. The efficiency and operational simplicity of introducing structural complexity into the isoquinoline frameworks can likely enable the collective synthesis of a large set of natural products. Here we show that fredericamycin A could be obtained via a short route by using our isoquinoline synthesis as a key step. A concise approach for rapid assembly of multicyclic isoquinoline scaffolds from pyridines and β-ethoxy α,β-unsaturated carbonyl compounds was developed, which enabled the formal total synthesis of fredericamycin A. ![]()
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Affiliation(s)
- Fang-Xin Wang
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Jia-Lei Yan
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Zhixin Liu
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Tingshun Zhu
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Yingguo Liu
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Shi-Chao Ren
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Wen-Xin Lv
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Zhichao Jin
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University Huaxi District Guiyang 550025 China
| | - Yonggui Robin Chi
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore.,State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University Huaxi District Guiyang 550025 China
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5
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Nurkanto A, Jeelani G, Santos HJ, Rahmawati Y, Mori M, Nakamura Y, Goto K, Saikawa Y, Annoura T, Tozawa Y, Sakura T, Inaoka DK, Shiomi K, Nozaki T. Characterization of Plasmodium falciparum Pantothenate Kinase and Identification of Its Inhibitors From Natural Products. Front Cell Infect Microbiol 2021; 11:639065. [PMID: 33768012 PMCID: PMC7985445 DOI: 10.3389/fcimb.2021.639065] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 01/29/2021] [Indexed: 12/17/2022] Open
Abstract
Coenzyme A (CoA) is a well-known cofactor that plays an essential role in many metabolic reactions in all organisms. In Plasmodium falciparum, the most deadly among Plasmodium species that cause malaria, CoA and its biosynthetic pathway have been proven to be indispensable. The first and rate-limiting reaction in the CoA biosynthetic pathway is catalyzed by two putative pantothenate kinases (PfPanK1 and 2) in this parasite. Here we produced, purified, and biochemically characterized recombinant PfPanK1 for the first time. PfPanK1 showed activity using pantetheine besides pantothenate, as the primary substrate, indicating that CoA biosynthesis in the blood stage of P. falciparum can bypass pantothenate. We further developed a robust and reliable screening system to identify inhibitors using recombinant PfPanK1 and identified four PfPanK inhibitors from natural compounds.
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Affiliation(s)
- Arif Nurkanto
- Research Center for Biology, Indonesian Institute of Sciences (LIPI), Cibinong, Indonesia.,Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Ghulam Jeelani
- Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Herbert J Santos
- Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yulia Rahmawati
- Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Mihoko Mori
- Kitasato Institute for Life Sciences, Kitasato University, Tokyo, Japan.,Biological Resource Center, National Institute of Technology and Evaluation (NITE), Chiba, Japan
| | - Yumi Nakamura
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama, Japan
| | - Kana Goto
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama, Japan
| | - Yoko Saikawa
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama, Japan
| | - Takeshi Annoura
- Department of Parasitology, National Institute of Infectious Diseases (NIID), Tokyo, Japan
| | - Yuzuru Tozawa
- Graduate School of Science and Engineering, Saitama University, Saitama, Japan
| | - Takaya Sakura
- Department of Molecular Infection Dynamics, School of Tropical Medicine and Global Health, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Daniel Ken Inaoka
- Department of Molecular Infection Dynamics, School of Tropical Medicine and Global Health, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Kazuro Shiomi
- Kitasato Institute for Life Sciences, Kitasato University, Tokyo, Japan
| | - Tomoyoshi Nozaki
- Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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6
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Chen K, Xie T, Shen Y, He H, Zhao X, Gao S. Calixanthomycin A: Asymmetric Total Synthesis and Structural Determination. Org Lett 2021; 23:1769-1774. [DOI: 10.1021/acs.orglett.1c00193] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Kuanwei Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Tao Xie
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Yanfang Shen
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Xiaoli Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
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7
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Xie T, Zheng C, Chen K, He H, Gao S. Asymmetric Total Synthesis of the Complex Polycyclic Xanthone FD‐594. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915787] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tao Xie
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Chaoying Zheng
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Kuanwei Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug DevelopmentEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug DevelopmentEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
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8
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Xie T, Zheng C, Chen K, He H, Gao S. Asymmetric Total Synthesis of the Complex Polycyclic Xanthone FD‐594. Angew Chem Int Ed Engl 2020; 59:4360-4364. [DOI: 10.1002/anie.201915787] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 01/12/2020] [Indexed: 01/01/2023]
Affiliation(s)
- Tao Xie
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Chaoying Zheng
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Kuanwei Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug DevelopmentEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical, ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug DevelopmentEast China Normal University 3663 North Zhongshan Road Shanghai 200062 China
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9
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Jia J, Chen R, Jia Y, Gu H, Zhou Q, Chen X. Convergent Formal Synthesis of Ecteinascidin 743. J Org Chem 2019; 84:13696-13706. [PMID: 31523959 DOI: 10.1021/acs.joc.9b01778] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A concise formal synthesis of ecteinascidin 743 is described. Key features involve the coupling of the multisubstituted tetrahydroisoquinoline and phenylalaninol moieties via a regio- and stereoselective Pictet-Spengler cyclization as well as the subsequent chemoselective MOM protection of the phenol group, which opens a rapid access to the desirable pentacycle. The synthesis successfully delivered the advanced intermediate with the characteristic macrolactone from sesamol in 23 steps.
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Affiliation(s)
- Junhao Jia
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , P.R. China
| | - Ruijiao Chen
- Jining Medical College , Jining 272067 , P.R. China
| | - Yuanliang Jia
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , P.R. China
| | - He Gu
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , P.R. China
| | - Qin Zhou
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , P.R. China
| | - Xiaochuan Chen
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , P.R. China
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10
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Abstract
The kigamicins are polycyclic aromatic natural products featuring a tetrahydroxanthone and up to four sugar residues. They are toxic to human cancer cells under nutrient-poor conditions. A synthesis of the natural product skeleton has been achieved from chiral pool materials. Key steps include a regioselective hydration of a diarylalkyne and two oxidative cyclizations.
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Affiliation(s)
- Ai-Jun Ma
- Department of Biochemistry , University of Texas Southwestern Medical Center , 5323 Harry Hines Boulevard , Dallas , Texas 75390-9038 , United States.,School of Biotechnology and Health Sciences , Wuyi University , Jiangmen 529020 , China
| | - Joseph M Ready
- Department of Biochemistry , University of Texas Southwestern Medical Center , 5323 Harry Hines Boulevard , Dallas , Texas 75390-9038 , United States
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11
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Toward the total synthesis of citreamicin η: Synthesis of the pentacyclic core and GAB-ring annelation model studies. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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12
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Abstract
The synthesis of kibdelone C, a polycyclic natural xanthone isolated from a soil actinomycete, was achieved through a convergent approach. A 6π-electrocyclization was applied to construct the highly substituted dihydrophenanthrenol fragment (B-C-D ring). InBr3-promoted lactonization was employed to build the isocoumarin ring, which served as a common precursor for the formation of isoquinolinone ring (A-B ring). A key DMAP-mediated oxa-Michael/aldol cascade reaction was developed to install the tetrahydroxanthone fragment (E-F ring). This approach provides a new solution to prepare its derivatives and structurally related natural products.
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Affiliation(s)
- Yihua Dai
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes , School of Chemistry and Molecular Engineering, East China Normal University , Shanghai 200062 , China
| | - Feixia Ma
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes , School of Chemistry and Molecular Engineering, East China Normal University , Shanghai 200062 , China
| | - Yanfang Shen
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes , School of Chemistry and Molecular Engineering, East China Normal University , Shanghai 200062 , China
| | - Tao Xie
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes , School of Chemistry and Molecular Engineering, East China Normal University , Shanghai 200062 , China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes , School of Chemistry and Molecular Engineering, East China Normal University , Shanghai 200062 , China.,Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development , East China Normal University , Shanghai 200062 , China
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13
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Xu S, Wang G, Xu F, Li W, Lin A, Yao H, Xu J. Concise Total Synthesis of (±)-Deguelin and (±)-Tephrosin Using a Vinyl Iodide as a Key Building Block. JOURNAL OF NATURAL PRODUCTS 2018; 81:1055-1059. [PMID: 29442505 DOI: 10.1021/acs.jnatprod.7b00794] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A concise and protecting-group-free total synthesis of the antiproliferative natural product (±)-deguelin (2) was accomplished in four steps and 62% overall yield from commercially available precursors. The key transformation employed a vinyl iodide as the pivotal building block to construct the 4-acylchromene substructure present in deguelin. Subsequent Cu2O-mediated α-hydroxylation of deguelin (2) afforded tephrosin (3) in 90% yield.
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Affiliation(s)
- Shengtao Xu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing 210009 , People's Republic of China
| | - Guangyu Wang
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing 210009 , People's Republic of China
| | - Feijie Xu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing 210009 , People's Republic of China
| | - Wenlong Li
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing 210009 , People's Republic of China
| | - Aijun Lin
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing 210009 , People's Republic of China
| | - Hequan Yao
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing 210009 , People's Republic of China
| | - Jinyi Xu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry , China Pharmaceutical University , 24 Tong Jia Xiang , Nanjing 210009 , People's Republic of China
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14
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Zhou X, Zhang Z, Zhao H, Lu P, Wang Y. Rh-Catalyzed Annulations of N-Methoxybenzamides and Ketenimines: Sterically and Electronically Controlled Synthesis of Isoquinolinones and Isoindolinones. J Org Chem 2017; 82:3787-3797. [DOI: 10.1021/acs.joc.7b00258] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaorong Zhou
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Zhiyin Zhang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Hongyang Zhao
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Ping Lu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Yanguang Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
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15
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Abstract
The citreamicins comprise a novel class of polycyclic xanthone natural products that have not yet yielded to total synthesis. A concise 11-step synthesis of the pentacyclic core of citreamicin η is now reported that features the use of a general approach for the synthesis of 1,4-dioxygenated xanthones. The synthesis also showcases improved techniques for effecting regioselective bromination of certain substituted phenols and coupling of acetylides with hindered ketones.
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Affiliation(s)
- Shawn Blumberg
- Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Stephen F Martin
- Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
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16
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Rujirawanich J, Kim S, Ma AJ, Butler JR, Wang Y, Wang C, Rosen M, Posner B, Nijhawan D, Ready JM. Synthesis and Biological Evaluation of Kibdelone C and Its Simplified Derivatives. J Am Chem Soc 2016; 138:10561-70. [PMID: 27459345 DOI: 10.1021/jacs.6b05484] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Poylcyclic tetrahydroxanthones comprise a large class of cytototoxic natural products. No mechanism of action has been described for any member of the family. We report the synthesis of kibdelone C and several simplified analogs. Both enantiomers of kibdeleone C show low nanomolar cytotoxicity toward multiple human cancer cell lines. Moreover, several simplified derivatives with improved chemical stability display higher activity than the natural product itself. In vitro studies rule out interaction with DNA or inhibition of topoisomerase, both of which are common modes of action for polycyclic aromatic compounds. However, celluar studies reveal that kibdelone C and its simplified derivatives disrupt the actin cytoseketon without directly binding actin or affecting its polymerization in vitro.
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Affiliation(s)
- Janjira Rujirawanich
- Department of Biochemistry and ‡Department of Internal Medicine, UT Southwestern Medical Center , 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Soyeon Kim
- Department of Biochemistry and ‡Department of Internal Medicine, UT Southwestern Medical Center , 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Ai-Jun Ma
- Department of Biochemistry and ‡Department of Internal Medicine, UT Southwestern Medical Center , 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - John R Butler
- Department of Biochemistry and ‡Department of Internal Medicine, UT Southwestern Medical Center , 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Yizhong Wang
- Department of Biochemistry and ‡Department of Internal Medicine, UT Southwestern Medical Center , 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Chao Wang
- Department of Biochemistry and ‡Department of Internal Medicine, UT Southwestern Medical Center , 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Michael Rosen
- Department of Biochemistry and ‡Department of Internal Medicine, UT Southwestern Medical Center , 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Bruce Posner
- Department of Biochemistry and ‡Department of Internal Medicine, UT Southwestern Medical Center , 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Deepak Nijhawan
- Department of Biochemistry and ‡Department of Internal Medicine, UT Southwestern Medical Center , 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Joseph M Ready
- Department of Biochemistry and ‡Department of Internal Medicine, UT Southwestern Medical Center , 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
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17
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Qin T, Iwata T, Ransom TT, Beutler JA, Porco JA. Syntheses of Dimeric Tetrahydroxanthones with Varied Linkages: Investigation of "Shapeshifting" Properties. J Am Chem Soc 2015; 137:15225-33. [PMID: 26544765 PMCID: PMC4863954 DOI: 10.1021/jacs.5b09825] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The 2,4'- and 4,4'-linked variants of the cytotoxic agent secalonic acid A and their analogues have been synthesized. Kinetic resolution of an unprotected tetrahydroxanthone scaffold followed by copper-mediated biaryl coupling allowed for efficient access to these compounds. Evaluation of the "shapeshifting" properties of 2,2'-, 2,4'-, and 4,4'-linked variants of the secalonic acids A in a polar solvent in conjunction with assays of the compounds against select cancer cell lines was conducted to study possible correlations between linkage variation and cytotoxicity.
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Affiliation(s)
- Tian Qin
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Takayuki Iwata
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Tanya T. Ransom
- Molecular Targets Laboratory, Frederick National Laboratory for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - John A. Beutler
- Molecular Targets Laboratory, Frederick National Laboratory for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - John A. Porco
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
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18
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Turner PA, Samiullah, Geden JV, White A, Clarkson GJ, Shipman M. New strategies for the synthesis and functionalization of tetrahydroxanthones. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.10.051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Li L, Zhao YL, Wang Q, Lin T, Liu Q. Base-Promoted Oxidative C–H Functionalization of α-Amino Carbonyl Compounds under Mild Metal-Free Conditions: Using Molecular Oxygen as the Oxidant. Org Lett 2015; 17:370-3. [DOI: 10.1021/ol503495h] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Lei Li
- Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Yu-Long Zhao
- Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Qian Wang
- Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Tao Lin
- Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Qun Liu
- Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
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20
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Zhang W, Ready JM. The Ketene-Surrogate Coupling: Catalytic Conversion of Aryl Iodides into Aryl Ketenes through Ynol Ethers. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Zhang W, Ready JM. The ketene-surrogate coupling: catalytic conversion of aryl iodides into aryl ketenes through ynol ethers. Angew Chem Int Ed Engl 2014; 53:8980-4. [PMID: 24975840 DOI: 10.1002/anie.201405036] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Indexed: 11/10/2022]
Abstract
tert-Butoxyacetylene is shown to undergo Sonogashira coupling with aryl iodides to yield aryl-substituted tert-butyl ynol ethers. These intermediates participate in a [1,5]-hydride shift, which results in the extrusion of isobutylene and the generation of aryl ketenes. The ketenes are trapped in situ with multiple nucleophiles or undergo electrocyclic ring closure to yield hydroxynaphthalenes and quinolines.
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Affiliation(s)
- Wenhan Zhang
- Department of Biochemistry, Division of Chemistry, UT Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-0938 (USA) http://www4.utsouthwestern.edu/readylab/index.htm
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22
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Castillo-Contreras EB, Dake GR. DMAP Promoted Tandem Addition Reactions Forming Substituted Tetrahydroxanthones. Org Lett 2014; 16:1642-5. [DOI: 10.1021/ol5002945] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Gregory R. Dake
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver, B.C., Canada, V6T 1Z1
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23
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Xiao Z, Cai S, Shi Y, Yang B, Gao S. A photo-induced C-O bond formation methodology to construct tetrahydroxanthones. Chem Commun (Camb) 2013; 50:5254-7. [PMID: 24301299 DOI: 10.1039/c3cc47426g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A metal-free, photo-induced C-O bond formation methodology was developed to construct tetrahydroxanthones. This mild and efficient methodology was based on intramolecular oxygen trapping of the reactive species produced by photolytic activation of a C-Cl bond. We believe this method could be used in the synthesis of related xanthone-type natural products.
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Affiliation(s)
- Zheming Xiao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663N Zhongshan Road, Shanghai 200062, China.
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