1
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Zhang Y, Chen L, Jia Y. Total Synthesis of Pallamolides A-E. Angew Chem Int Ed Engl 2024; 63:e202319127. [PMID: 38504637 DOI: 10.1002/anie.202319127] [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: 12/19/2023] [Revised: 03/12/2024] [Accepted: 03/19/2024] [Indexed: 03/21/2024]
Abstract
We have achieved the first total synthesis of pallamolides A-E. Of these compounds, pallamolides B-E possess intriguing tetracyclic skeletons with novel intramolecular transesterifications. Key transformations include highly diastereoselective sequential Michael addition reactions to construct the bicyclo[2.2.2]octane core with the simultaneous generation of two quaternary carbon centers, a one-pot SmI2-mediated intramolecular ketyl-enoate cyclization/ketone reduction to generate the key oxabicyclo[3.3.1]nonane moiety, and an acid-mediated deprotection/oxa-Michael addition/β-hydroxy elimination cascade sequence to assemble the tetracyclic pallamolide skeleton. Kinetic resolution of ketone 14 through Corey-Bakshi-Shibata reduction enabled the asymmetric synthesis of pallamolides A-E.
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Affiliation(s)
- Yu Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing, 100191, P. R. China
| | - Lijun Chen
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing, 100191, P. R. China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing, 100191, P. R. China
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2
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Biçer E, Yılmaz M. Recent Advances in Manganese(III)-Assisted Radical Cyclization for the Synthesis of Natural Products: A Comprehensive Review. Molecules 2024; 29:2264. [PMID: 38792125 PMCID: PMC11123744 DOI: 10.3390/molecules29102264] [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: 03/30/2024] [Revised: 05/03/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
Natural products play an important part in synthetic chemistry since they have many pharmacological properties and are used as active drug compounds in pharmaceutical chemistry. However, synthesis of these complex molecules is difficult due to the requirement of various synthetic steps, which include highly regio- and stereoselectivity. Therefore, oxidative radical cyclization assisted by manganese(III) acetate serves as an important step in obtaining spiro-, tricyclic, tetracyclic, and polycyclic derivatives of these compounds. Manganese(III)-based reactions offer a single-step regio- and stereoselective cyclizations and α-acetoxidations, reducing the number of synthetic steps. Also, the manganese(III)-mediated oxidative free radical cyclization method has been successfully applied for the synthesis of cyclic structures found in many natural products. This article presents a broad overview of manganese(III)-based radical reactions of natural products as a key step in overall synthesis. The authors have classified natural product synthesis processes assisted by manganese(III) acetate as intermolecular, intramolecular, oxidation, acetoxidation, aromatization, and polymerization reactions, respectively.
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Affiliation(s)
- Emre Biçer
- Faculty of Engineering and Natural Sciences, Sivas University of Science and Technology, 58010 Sivas, Türkiye
| | - Mehmet Yılmaz
- Department of Chemistry, Faculty of Art and Sciences, Kocaeli University, 41380 Umuttepe, Türkiye;
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3
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Kisszékelyi P, Šebesta R. Enolates ambushed - asymmetric tandem conjugate addition and subsequent enolate trapping with conventional and less traditional electrophiles. Beilstein J Org Chem 2023; 19:593-634. [PMID: 37180457 PMCID: PMC10167861 DOI: 10.3762/bjoc.19.44] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 04/21/2023] [Indexed: 05/16/2023] Open
Abstract
Metal enolates are useful intermediates and building blocks indispensable in many organic synthetic transformations. Chiral metal enolates obtained by asymmetric conjugate additions of organometallic reagents are structurally complex intermediates that can be employed in many transformations. In this review, we describe this burgeoning field that is reaching maturity after more than 25 years of development. The effort of our group to broaden possibilities to engage metal enolates in reactions with new electrophiles is described. The material is divided according to the organometallic reagent employed in the conjugate addition step, and thus to the particular metal enolate formed. Short information on applications in total synthesis is also given.
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Affiliation(s)
- Péter Kisszékelyi
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
| | - Radovan Šebesta
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
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4
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Suzuki T, Ikeda W, Kanno A, Ikeuchi K, Tanino K. Diastereoselective Synthesis of trans-anti-Hydrophenanthrenes via Ti-mediated Radical Cyclization and Total Synthesis of Kamebanin. Chemistry 2023; 29:e202203511. [PMID: 36529687 DOI: 10.1002/chem.202203511] [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: 11/11/2022] [Revised: 12/16/2022] [Accepted: 12/17/2022] [Indexed: 12/23/2022]
Abstract
Ent-kaurenes consist of an ABC-ring based on a trans-anti-hydrophenanthrene skeleton and a D ring with an exomethylene. Highly oxygen-functionalized ent-kauren-15-ones have promising antiinflammatory pharmacological activity. In this study, we developed a novel diastereoselective synthesis of trans-anti-hydrophenanthrenes via a Ti-mediated reductive radical cyclization. We also demonstrated the applicability of this method by developing the first total synthesis of (±)-kamebanin (longest linear sequence; 17 steps, overall yield; 6.5 %). Furthermore, this synthesis provided a formal semi-pinacol rearrangement for the construction of the quaternary carbon at C8 and a novel Thorpe-Ziegler-type reaction for the construction of the D-ring.
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Affiliation(s)
- Takahiro Suzuki
- Department of Chemistry, Faculty of Science, Hokkaido University, 060-0810, Sapporo, Hokkaido, Japan
| | - Wataru Ikeda
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, 060-0810, Sapporo, Hokkaido, Japan
| | - Ayaka Kanno
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, 060-0810, Sapporo, Hokkaido, Japan
| | - Kazutada Ikeuchi
- Department of Chemistry, Faculty of Science, Hokkaido University, 060-0810, Sapporo, Hokkaido, Japan
| | - Keiji Tanino
- Department of Chemistry, Faculty of Science, Hokkaido University, 060-0810, Sapporo, Hokkaido, Japan
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5
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Chen Y, Gao S. Total Synthesis of (–)-Principinol C. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202300001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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6
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Fay N, Blieck R, Kouklovsky C, de la Torre A. Total synthesis of grayanane natural products. Beilstein J Org Chem 2022; 18:1707-1719. [PMID: 36570567 PMCID: PMC9764858 DOI: 10.3762/bjoc.18.181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 11/16/2022] [Indexed: 12/14/2022] Open
Abstract
Grayananes are a broad family of diterpenoids found in Ericaceae plants, comprising more than 160 natural products. Most of them exhibit interesting biological activities, often representative of Ericaceae use in traditional medicine. Over the last 50 years, various strategies were described for the total synthesis of these diterpenoids. In this review, we survey the literature for synthetic approaches to access grayanane natural products. We will focus mainly on completed total syntheses, but will also mention unfinished synthetic efforts. This work aims at providing a critical perspective on grayanane synthesis, highlighting the advantages and downsides of each strategy, as well as the challenges remaining to be tackled.
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Affiliation(s)
- Nicolas Fay
- Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), Université Paris-Saclay, CNRS, 15, rue Georges Clémenceau, 91405 Orsay Cedex, France
| | - Rémi Blieck
- Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), Université Paris-Saclay, CNRS, 15, rue Georges Clémenceau, 91405 Orsay Cedex, France
| | - Cyrille Kouklovsky
- Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), Université Paris-Saclay, CNRS, 15, rue Georges Clémenceau, 91405 Orsay Cedex, France
| | - Aurélien de la Torre
- Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), Université Paris-Saclay, CNRS, 15, rue Georges Clémenceau, 91405 Orsay Cedex, France
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7
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Ma T, Cheng H, Pitchakuntla M, Ma W, Jia Y. Total Synthesis of (−)-Principinol C. J Am Chem Soc 2022; 144:20196-20200. [DOI: 10.1021/jacs.2c08694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tianhao Ma
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Hao Cheng
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Mallesham Pitchakuntla
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Weihao Ma
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
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8
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Zhou YF, Yan BC, Yang Q, Long XY, Zhang DQ, Luo RH, Wang HY, Sun HD, Xue XS, Zheng YT, Puno PT. Harnessing Natural Products by a Pharmacophore-Oriented Semisynthesis Approach for the Discovery of Potential Anti-SARS-CoV-2 Agents. Angew Chem Int Ed Engl 2022; 61:e202201684. [PMID: 35484726 PMCID: PMC9074085 DOI: 10.1002/anie.202201684] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Indexed: 12/11/2022]
Abstract
Natural products possessing unique scaffolds may have antiviral activity but their complex structures hinder facile synthesis. A pharmacophore‐oriented semisynthesis approach was applied to (−)‐maoelactone A (1) and oridonin (2) for the discovery of anti‐SARS‐CoV‐2 agents. The Wolff rearrangement/lactonization cascade (WRLC) reaction was developed to construct the unprecedented maoelactone‐type scaffold during semisynthesis of 1. Further mechanistic study suggested a concerted mechanism for Wolff rearrangement and a water‐assisted stepwise process for lactonization. The WRLC reaction then enabled the creation of a novel family by assembly of the maoelactone‐type scaffold and the pharmacophore of 2, whereby one derivative inhibited SARS‐CoV‐2 replication in HPA EpiC cells with a low EC50 value (19±1 nM) and a high TI value (>1000), both values better than those of remdesivir.
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Affiliation(s)
- Yuan-Fei Zhou
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Kunming, 650201, China
| | - Bing-Chao Yan
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Kunming, 650201, China
| | - Qian Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Kunming, 650201, China
| | - Xin-Yan Long
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
| | - Dan-Qi Zhang
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.,Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Rong-Hua Luo
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
| | - Han-Yu Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Kunming, 650201, China
| | - Han-Dong Sun
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Kunming, 650201, China
| | - Xiao-Song Xue
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.,Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Yong-Tang Zheng
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
| | - Pema-Tenzin Puno
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Kunming, 650201, China
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9
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Zhou YF, Yan BC, Yang Q, Long XY, Zhang DQ, Luo RH, Wang HY, Sun HD, Xue XS, Zheng YT, Puno PT. Harnessing Natural Products by a Pharmacophore‐Oriented Semisynthesis Approach for the Discovery of Potential Anti‐SARS‐CoV‐2 Agents. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuan-Fei Zhou
- Kunming Institute of Botany Chinese Academy of Sciences State Key Laboratory of Phytochemistry and Plant Resources in West China CHINA
| | - Bing-Chao Yan
- Kunming Institute of Botany Chinese Academy of Sciences State Key Laboratory of Phytochemistry and Plant Resources in West China CHINA
| | - Qian Yang
- Kunming Institute of Botany Chinese Academy of Sciences State Key Laboratory of Phytochemistry and Plant Resources in West China CHINA
| | - Xin-Yan Long
- Kunming Institute of Zoology Chinese Academy of Sciences Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences CHINA
| | - Dan-Qi Zhang
- Nankai University State Key Laboratory of Elemento-organic Chemistry CHINA
| | - Rong-Hua Luo
- Kunming Institute of Zoology Chinese Academy of Sciences Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences CHINA
| | - Han-Yu Wang
- Kunming Institute of Botany Chinese Academy of Sciences State Key Laboratory of Phytochemistry and Plant Resources in West China CHINA
| | - Han-Dong Sun
- Kunming Institute of Botany Chinese Academy of Sciences State Key Laboratory of Phytochemistry and Plant Resources in West China CHINA
| | - Xiao-Song Xue
- Nankai University State Key Laboratory of Elemento-organic Chemistry CHINA
| | - Yong-Tang Zheng
- Kunming Institute of Zoology Chinese Academy of Sciences Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences CHINA
| | - Pema-Tenzin Puno
- Kunming Institute of Botany Chinese Academy of Sciences State Key Laboratory of Phytochemistry and Plant Resources in West China No. 132, Lanhei Road 650201 Kunming CHINA
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10
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Ao J, Sun C, Chen B, Yu N, Liang G. Total Synthesis of Isorosthin L and Isoadenolin I. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114489] [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)
- Junli Ao
- State Key Laboratory of Elemento-organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
- School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Chao Sun
- School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Bolin Chen
- State Key Laboratory of Elemento-organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
| | - Na Yu
- School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Guangxin Liang
- School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
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11
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Ao J, Sun C, Chen B, Yu N, Liang G. Total Synthesis of Isorosthin L and Isoadenolin I. Angew Chem Int Ed Engl 2021; 61:e202114489. [PMID: 34773349 DOI: 10.1002/anie.202114489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Indexed: 11/05/2022]
Abstract
Total syntheses of two Isodon diterpenes, isorosthin L and isoadenolin I, are reported. The synthetic strategy features a quick assembly of two simple building blocks through a diastereoselective intermolecular aldol reaction and a subsequent radical cyclization for efficient construction of a rather complex advanced intermediate bearing a quaternary stereocenter present in all Isodon diterpenes. Oxidative cleavage of the C-C bond in the cyclopentane enabled the conversion to a lactone moiety which is desired for the construction of the molecular skeleton through reductive coupling with an aldehyde carbonyl group.
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Affiliation(s)
- Junli Ao
- Nankai University, College of Chemistry, 300071, Tianjin, CHINA
| | - Chao Sun
- ShanghaiTech University, School of Physical Science and Technology, 201210, Shanghai, CHINA
| | - Bolin Chen
- Nankai University, College of Chemistry, 300071, CHINA
| | - Na Yu
- ShanghaiTech University, School of Physical Science and Technology, 201210, Shanghai, CHINA
| | - Guangxin Liang
- ShanghaiTech University, School of Physical Science and Technology, 94 Weijin Road, Nankai District, 300071, Tianjin, CHINA
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12
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Wang Z, Hui C, Xie Y. Natural STAT3 inhibitors: A mini perspective. Bioorg Chem 2021; 115:105169. [PMID: 34333418 DOI: 10.1016/j.bioorg.2021.105169] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 07/03/2021] [Accepted: 07/09/2021] [Indexed: 12/22/2022]
Abstract
Signal transducer and activator of transcription 3 (STAT3) plays pivotal role in several cellular processes such as cell proliferation and survival and has been found to be aberrantly activated in many cancers. STAT3 is largely believed to be one of the key oncogenes and crucial therapeutic targets. Much research has suggested the leading mechanisms for regulating the STAT3 pathway and its role in promoting tumorigenesis. Therefore, intensive efforts have been devoted to develop potent STAT3 inhibitors and several of them are currently undergoing clinical trials. Nevertheless, many natural products were identified as STAT3 inhibitors but attract less attention compared to the small molecule counterpart. In this review, the development of natural STAT3 inhibitors with an emphasis on their biological profile and chemical synthesis are detailed. The current state of STAT3 inhibitors and the future directions and opportunities for STAT3 inhibitor are discussed.
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Affiliation(s)
- Zhuo Wang
- Southern University of Science and Technology, School of Medicine, Shenzhen 518055, People's Republic of China.
| | - Chunngai Hui
- Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Yusheng Xie
- Department of Pharmacology, School of Basic Medical Sciences, Shandong University, Jinan 250012, China
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13
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Zhao X, Cacherat B, Hu Q, Ma D. Recent advances in the synthesis of ent-kaurane diterpenoids. Nat Prod Rep 2021; 39:119-138. [PMID: 34263890 DOI: 10.1039/d1np00028d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Covering: 2015 to 2020The ent-kaurane diterpenoids are integral parts of tetracyclic natural products that are widely distributed in terrestrial plants. These compounds have been found to possess interesting bioactivities, ranging from antitumor, antifungal and antibacterial to anti-inflammatory activities. Structurally, the different tetracyclic moieties of ent-kauranes can be seen as the results of intramolecular cyclizations, oxidations, C-C bond cleavages, degradation, or rearrangements, starting from their parent skeleton. During the past decade, great efforts have been made to develop novel strategies for synthesizing these natural products. The purpose of this review is to describe the recent advances in the total synthesis of ent-kaurane diterpenoids covering the period from 2015 to date.
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Affiliation(s)
- Xiangbo Zhao
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.
| | - Bastien Cacherat
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.
| | - Qifei Hu
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.
| | - Dawei Ma
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.
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14
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Zong Y, Xu Z, Zhu R, Su A, Liu X, Zhu M, Han J, Zhang J, Xu Y, Lou H. Enantioselective Total Syntheses of Manginoids A and C and Guignardones A and C. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yan Zong
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Ze‐Jun Xu
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Rong‐Xiu Zhu
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 China
| | - Ai‐Hong Su
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Xu‐Yuan Liu
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Ming‐Zhu Zhu
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Jing‐Jing Han
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Jiao‐Zhen Zhang
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Yu‐Liang Xu
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
| | - Hong‐Xiang Lou
- Department of Natural Products Chemistry Key Lab of Chemical Biology School of Pharmaceutical Sciences Shandong University Jinan 250012 China
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15
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Zong Y, Xu ZJ, Zhu RX, Su AH, Liu XY, Zhu MZ, Han JJ, Zhang JZ, Xu YL, Lou HX. Enantioselective Total Syntheses of Manginoids A and C and Guignardones A and C. Angew Chem Int Ed Engl 2021; 60:15286-15290. [PMID: 33876516 DOI: 10.1002/anie.202104182] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/19/2021] [Indexed: 12/23/2022]
Abstract
An enantioselective synthetic approach for preparing manginoids and guignardones, two types of biogenetically related meroterpenoids, is reported. This bioinspired and divergent synthesis employs an oxidative 1,3-dicarbonyl radical-initiated cyclization and cyclodehydration of the common precursor to forge the central ring of the manginoids and guignardones, respectively, at a late stage. Key synthetic steps include silica-gel-promoted semipinacol rearrangement to form the 6-oxabicyclo[3.2.1]octane skeleton and the Suzuki-Miyaura reaction of vinyl bromide to achieve fragment coupling. This synthesis protocol enables the asymmetric syntheses of four fungal meroterpenoids from commercially available materials.
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Affiliation(s)
- Yan Zong
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Ze-Jun Xu
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Rong-Xiu Zhu
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China.,School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Ai-Hong Su
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Xu-Yuan Liu
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Ming-Zhu Zhu
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Jing-Jing Han
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Jiao-Zhen Zhang
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Yu-Liang Xu
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Hong-Xiang Lou
- Department of Natural Products Chemistry, Key Lab of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
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16
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Wang B, Liu Z, Tong Z, Gao B, Ding H. Asymmetric Total Syntheses of 8,9‐Seco‐
ent
‐kaurane Diterpenoids Enabled by an Electrochemical ODI‐[5+2] Cascade. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104410] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Bingnan Wang
- Department of Chemistry Zhejiang University Hangzhou 310058 China
| | - Zhaobo Liu
- Department of Chemistry Zhejiang University Hangzhou 310058 China
| | - Zhenzhong Tong
- Department of Chemistry Zhejiang University Hangzhou 310058 China
| | - Beiling Gao
- Department of Chemistry Zhejiang University Hangzhou 310058 China
| | - Hanfeng Ding
- Department of Chemistry Zhejiang University Hangzhou 310058 China
- State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
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17
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Wang B, Liu Z, Tong Z, Gao B, Ding H. Asymmetric Total Syntheses of 8,9-Seco-ent-kaurane Diterpenoids Enabled by an Electrochemical ODI-[5+2] Cascade. Angew Chem Int Ed Engl 2021; 60:14892-14896. [PMID: 33900670 DOI: 10.1002/anie.202104410] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Indexed: 12/11/2022]
Abstract
An electrochemical ODI-[5+2] cascade reaction was developed which enables the rapid assembly of diversely functionalized bicyclo[3.2.1]octadienones from sensitive ethynylphenols. By combining a directed retro-aldol/aldol process, a [2,3]-sigmatropic rearrangement, and an Al(O-iPr)3 -promoted reductive 1,3-transposition, the asymmetric total syntheses of five 8,9-seco-ent-kauranoids-(-)-shikoccin, (-)-O-methylshikoccin, (-)-epoxyshikoccin, (+)-O-methylepoxyshikoccin, and (+)-rabdo-hakusin-have been achieved in a concise and efficient manner.
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Affiliation(s)
- Bingnan Wang
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Zhaobo Liu
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Zhenzhong Tong
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Beiling Gao
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Hanfeng Ding
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
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18
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Tu Q, Wang Z, Zhang Z, Huang J, Yang Z. Synthetic Strategy for Construction of Highly Congested Tetracyclic Core (6-5-7-4) of Harziane Diterpenoids. Org Lett 2021; 23:4088-4093. [PMID: 33988367 DOI: 10.1021/acs.orglett.1c00769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The structurally intriguing tetracyclic core of complex harziane diterpenoid was constructed in 14 steps from commercially available 3-ethoxycyclohex-2-en-1-one. The key steps were a Mn/Cu-mediated oxidative 1,3-dicarbonyl radical cascade cyclization reaction, which diastereoselectively formed the core of dimethylbicyclo[3.2.1]octane structure, and a Au-catalyzed diastereoselective formal [2 + 2] cycloaddition for construction of the harziane diterpenoid tetracyclic framework. The developed method paves the way for achieving total synthesis of this type of complex natural product.
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Affiliation(s)
- Qian Tu
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Zheyuan Wang
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Zhongchao Zhang
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Jun Huang
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Zhen Yang
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China.,Shenzhen Bay Laboratory, Shenzhen 518055, China
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19
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Webster CG, Park H, Ennis AF, Hong J. Synthetic efforts toward the bicyclo[3.2.1]octane fragment of rhodojaponin III. Tetrahedron Lett 2021; 71:153055. [PMID: 34054153 PMCID: PMC8153367 DOI: 10.1016/j.tetlet.2021.153055] [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] [Indexed: 10/21/2022]
Abstract
Rhodojaponin III is a grayanane-type diterpenoid natural product with a novel chemical scaffold. It shows potent antinociceptive activity and may represent a new class of natural non-opioid analgesics with a novel mode of action. We explored the Au(I)-catalyzed Conia-ene cyclization and the Mn(III)-mediated radical cyclization of alkynyl ketones for the synthesis of the bicyclo[3.2.1]octane fragment of rhodojaponin III. These strategies will be applicable in the synthesis of rhodojaponin III and analogs for future biological studies.
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Affiliation(s)
- Caroline G Webster
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Hyeri Park
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Amanda F Ennis
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Jiyong Hong
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
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20
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Abstract
The field of total synthesis has reached a stage in which emphasis has been increasingly focused on synthetic efficiency rather than merely achieving the synthesis of a target molecule. The pursuit of synthetic efficiency, typically represented by step count and overall yield, is a rich source of inspiration and motivation for synthetic chemists to invent innovative strategies and methods. Among them, convergent strategy has been well recognized as an effective approach to improve efficiency. This strategy generally involves coupling of fragments with similar complexity to furnish the target molecule via subsequent cyclization or late-stage functionalization. Thus, methodologies that enable effective connection of fragments are critical to devising a convergent plan. In our laboratory, convergent strategy has served as a long-standing principle for pursuing efficient synthesis during the course of planning and implementing synthetic projects. In this Account, we summarize our endeavors in the convergent synthesis of natural products over the last ten years. We show how we identify reasonable bond disconnections and employ enabling synthetic methodologies to maximize convergency, leading to the efficient syntheses of over two-dozen highly complex molecules from eight disparate families.In detail, we categorize our work into three parts based on the diverse reaction types for fragment assembly. First, we demonstrate the application of a powerful single-electron reducing agent, SmI2, in a late-stage cyclization step, forging the polycyclic skeletons of structurally fascinating Galbulimima alkaloids and Leucosceptrum sesterterpenoids. Next, we showcase how three different types of cycloaddition reactions can simultaneously construct two challenging C-C bonds in a single step, providing concise entries to three distinct families, namely, spiroquinazoline alkaloids, gracilamine, and kaurane diterpenoids. In the third part, we describe convergent assembly of ent-kaurane diterpenoids, gelsedine-type alkaloids, and several drug molecules via employing some bifunctional synthons. To access highly oxidized ent-kaurane diterpenoids, we introduce the hallmark bicyclo[3.2.1]octane ring system at an early stage, and then execute coupling and cyclization by means of a Hoppe's homoaldol reaction and a Mukaiyama-Michael-type addition, respectively. Furthermore, we showcase how the orchestrated combination of an asymmetric Michael addition, a tandem oxidation-aldol reaction and a pinacol rearrangement can dramatically improve the efficiency in synthesizing gelsedine-type alkaloids, with nary a protecting group. Finally, to address the supply issue of several drugs, including anti-influenza drug zanamivir and antitumor agent Et-743, we exploit scalable and practical approaches to provide advantages over current routes in terms of cost, ease of execution, and efficiency.
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Affiliation(s)
- Yang Gao
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
| | - Dawei Ma
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
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21
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Zhang T, Li N, Zhou N, Ma W, Wei H, Zhang B, Chen L, Hai G, Duan Y, Bai S. Design, Synthesis and Biological Evaluation of Novel Thiazole-Fused Glaucocalyxin A Derivatives. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202101058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Liu W, Hong B, Wang J, Lei X. New Strategies in the Efficient Total Syntheses of Polycyclic Natural Products. Acc Chem Res 2020; 53:2569-2586. [PMID: 33136373 DOI: 10.1021/acs.accounts.0c00531] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Polycyclic natural products are an inexhaustible source of medicinal agents, and their complex molecular architecture renders challenging synthetic targets where innovative and effective approaches for their rapid construction are urgently required. The total synthesis of polycyclic natural products has witnessed exponential progression along with the emergence of new synthetic strategies and concepts, such as sequential C-H functionalizations, radical-based transformations, and functional group pairing strategies. Our group exerts continued interest in the construction of bioactive and structurally complex natural products as well as evaluation of the mode of action of these molecules. In this Account, we will showcase how these new synthetic strategies are employed and guide our total synthesis endeavors.During the last two decades, a series of remarkable advances in C-H functionalization have led to the emergence of many new approaches to directly functionalize C-H bonds into useful functional groups. These selective transformations have provided a great opportunity for the step- and atom-economical construction of key fragments in complex molecule synthesis. We recently furnished the total syntheses for polycyclic natural products: incarviatone A, chrysomycin A, polycarcin V, and gilvocarcin V by employing a multiple C-H bond functionalization strategy. The polysubstituted benzene or naphthalene skeleton was constructed through sequential and site-selective C-H functionalizations from readily available simple starting materials, which reduced the number of steps and streamlined synthesis.Recently, we have also completed the total syntheses for a number of skeletally diverse tetracyclic Isodon diterpenoids inspired by their biogenesis and radical-based retrosynthetic disconnections. Radical transformations are strategically and tactically utilized in our syntheses, and radical-based reactions, including organo-SOMO catalysis, Birch reduction, regioselective 1,6-dienyne reductive cyclization, visible-light-mediated Schenck ene reaction, and photoradical-mediated late-stage skeletal rearrangement, play significant roles in our synthetic endeavors. Protecting-group-free and scalable syntheses are also built into our work to achieve the "ideal" synthesis. Furthermore, our synthetic work reveals that late-stage skeletal rearrangement through a photo radical process is possible in a biological setting in complement with nature's carbocation chemistry in complex natural product biosynthesis.Lycopodium alkaloids are a large family of structurally unique polycyclic natural products with impressive biological activities. Owing to their fascinating polycyclic architectures and diverse biological activities, these alkaloids have continued to serve as targets as well as inspirations for the synthetic community for decades. To access these bioactive natural products or natural product-like molecules for biological exploration and drug discovery, we applied a novel functional group pairing strategy to furnish the total syntheses for several Lycopodium alkaloids and obtained numerous skeletally diverse compounds with structural complexity comparable to natural products.
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Affiliation(s)
- Weilong Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering and Department of Chemical Biology, Synthetic and Functional Biomolecules Center, Peking University, Beijing 100871, China
| | - Benke Hong
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering and Department of Chemical Biology, Synthetic and Functional Biomolecules Center, Peking University, Beijing 100871, China
| | - Jin Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering and Department of Chemical Biology, Synthetic and Functional Biomolecules Center, Peking University, Beijing 100871, China
| | - Xiaoguang Lei
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering and Department of Chemical Biology, Synthetic and Functional Biomolecules Center, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
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23
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Liu W, Yue Z, Wang Z, Li H, Lei X. Syntheses of Skeletally Diverse Tetracyclic Isodon Diterpenoid Scaffolds Guided by Dienyne Radical Cyclization Logic. Org Lett 2020; 22:7991-7996. [PMID: 33021378 DOI: 10.1021/acs.orglett.0c02920] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We report herein the diversity-oriented synthesis of various tetracyclic Isodon diterpenoid scaffolds guided by radical cyclization logic. Our substrate-based dienyne radical cyclization approach is distinctive from reagent-based rearrangement approaches that are generally applied in biosynthesis or previous synthetic studies. An unprecedented cyclization at C14 via 1,5-radical translocation/5-exo-trig cyclization is observed, which enriches our radical cyclization pattern. Furthermore, biological evaluations revealed that several new natural product-like compounds showed promising anticancer activities against various cancer cell lines.
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24
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Xu Z, Zong Y, Qiao Y, Zhang J, Liu X, Zhu M, Xu Y, Zheng H, Fang L, Wang X, Lou H. Divergent Total Synthesis of Euphoranginol C, Euphoranginone D,
ent
‐Trachyloban‐3β‐ol,
ent
‐Trachyloban‐3‐one, Excoecarin E, and
ent
‐16α‐Hydroxy‐atisane‐3‐one. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009128] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Ze‐Jun Xu
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Yan Zong
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Ya‐Nan Qiao
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Jiao‐Zhen Zhang
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Xuyuan Liu
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Ming‐Zhu Zhu
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Yuliang Xu
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Hongbo Zheng
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Liyuan Fang
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Xiao‐ning Wang
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Hong‐Xiang Lou
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
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25
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Xu Z, Zong Y, Qiao Y, Zhang J, Liu X, Zhu M, Xu Y, Zheng H, Fang L, Wang X, Lou H. Divergent Total Synthesis of Euphoranginol C, Euphoranginone D,
ent
‐Trachyloban‐3β‐ol,
ent
‐Trachyloban‐3‐one, Excoecarin E, and
ent
‐16α‐Hydroxy‐atisane‐3‐one. Angew Chem Int Ed Engl 2020; 59:19919-19923. [PMID: 32696611 DOI: 10.1002/anie.202009128] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Indexed: 02/06/2023]
Affiliation(s)
- Ze‐Jun Xu
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Yan Zong
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Ya‐Nan Qiao
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Jiao‐Zhen Zhang
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Xuyuan Liu
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Ming‐Zhu Zhu
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Yuliang Xu
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Hongbo Zheng
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Liyuan Fang
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Xiao‐ning Wang
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
| | - Hong‐Xiang Lou
- Department of Natural Products Chemistry Key Lab of Chemical Biology (MOE) School of Pharmaceutical Sciences Shandong University No. 44 West Wenhua Road Jinan 250012 P. R. China
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