1
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Okuyama M, Umekubo N, Akimoto K, Shimizu T, Kubokoya K, Nakajima N, Nishiyama Y, Yokoshima S. Total syntheses of macleanine and lycoposerramine-S. Org Biomol Chem 2023; 21:6289-6292. [PMID: 37505101 DOI: 10.1039/d3ob01065a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Total syntheses of fawcettimine-class Lycopodium alkaloids having an imino bridge between C5 and C13 were accomplished. Fawcettimine was first prepared in 10 steps from a known compound, and the characteristic structures, including the imino bridge, were constructed via the formation of a bridgehead imine.
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Affiliation(s)
- Masahiro Okuyama
- Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya 464-8601, Japan.
| | - Nariyoshi Umekubo
- Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya 464-8601, Japan.
| | - Kenta Akimoto
- Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya 464-8601, Japan.
| | - Takahisa Shimizu
- Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya 464-8601, Japan.
| | - Kazuhiro Kubokoya
- Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya 464-8601, Japan.
| | - Nagayasu Nakajima
- Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya 464-8601, Japan.
| | - Yoshitake Nishiyama
- Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya 464-8601, Japan.
| | - Satoshi Yokoshima
- Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya 464-8601, Japan.
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2
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He F, Feng S, Zhao Y, Shi H, Duan X, Li H, Xie X, She X. Collective Total Syntheses of Five
Lycopodium
Alkaloids. Angew Chem Int Ed Engl 2022; 61:e202205439. [DOI: 10.1002/anie.202205439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Feifei He
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Tianshui Road 222 Lanzhou 730000 Gansu P. R. China
| | - Shangbiao Feng
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Tianshui Road 222 Lanzhou 730000 Gansu P. R. China
| | - Yulong Zhao
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Tianshui Road 222 Lanzhou 730000 Gansu P. R. China
| | - Hongliang Shi
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Tianshui Road 222 Lanzhou 730000 Gansu P. R. China
| | - Xiaoguang Duan
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Tianshui Road 222 Lanzhou 730000 Gansu P. R. China
| | - Huilin Li
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Tianshui Road 222 Lanzhou 730000 Gansu P. R. China
| | - Xingang Xie
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Tianshui Road 222 Lanzhou 730000 Gansu P. R. China
| | - Xuegong She
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Tianshui Road 222 Lanzhou 730000 Gansu P. R. China
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3
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He F, Feng S, Zhao Y, Shi H, Duan X, Li H, Xie X, She X. Collective Total Syntheses of Five Lycopodium Alkaloids. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Feifei He
- Lanzhou University Department of Chemistry CHINA
| | | | - Yulong Zhao
- Lanzhou University Department of Chemistry CHINA
| | | | | | - Huilin Li
- Lanzhou University Department of Chemistry CHINA
| | - Xingang Xie
- Lanzhou University Department of Chemistry CHINA
| | - Xuegong She
- Lanzhou University Department of Chemistry Tianshui Road 730000 Lanzhou CHINA
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4
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Kurose T, Itoga M, Nanjo T, Takemoto Y, Tsukano C. Total Synthesis of Lyconesidine B: Approach to a Three-Dimensional Tetracyclic Skeleton of Amine-Type Fawcettimine Core and Studies of Asymmetric Synthesis. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20220049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tomohiro Kurose
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501
| | - Moeko Itoga
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501
| | - Takeshi Nanjo
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501
| | - Chihiro Tsukano
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502
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5
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Zhong LR, Huang BB, Yang XL, Wang S, Yao ZJ. Concise Unified Access to (-)-8-Deoxy-13-dehydroserratinine, (+)-Fawcettimine, (+)-Fawcettidine, and (-)-8-Deoxyserratinine Using a Direct Intramolecular Reductive Coupling. Org Lett 2021; 23:3578-3583. [PMID: 33891425 DOI: 10.1021/acs.orglett.1c00977] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A short, scalable, and collective total synthesis of four fawcettimine-type Lycopodium alkaloids in eight or nine steps is disclosed. A dense multi-small-ring spiro-α-aminocyclopentanone successfully served as the key intermediate, which was directly accessed by a LiDBB-mediated intramolecular reductive coupling of the aliphatic imine and an ester-carbonyl. Compared to those that employ classical Heathcock intermediate(s) containing a nine-membered ring, the new strategy shows the significant improvement of the synthetic step and redox economies as well as excellent stereochemical control.
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Affiliation(s)
- Lin-Rui Zhong
- State Key Laboratory of Coordination Chemistry and Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Bing-Bing Huang
- State Key Laboratory of Coordination Chemistry and Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Xiao-Liang Yang
- State Key Laboratory of Coordination Chemistry and Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Shaozhong Wang
- State Key Laboratory of Coordination Chemistry and Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Zhu-Jun Yao
- State Key Laboratory of Coordination Chemistry and Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
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6
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Kurose T, Tsukano C, Nanjo T, Takemoto Y. Total Synthesis of Lyconesidine B, a Lycopodium Alkaloid with an Oxygenated, Amine-Type Fawcettimine Core. Org Lett 2021; 23:676-681. [PMID: 33325708 DOI: 10.1021/acs.orglett.0c03816] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This report describes the total synthesis of the complex, oxygenated tetracyclic alkaloid, lyconesidine B. The key synthetic challenge involves diastereoselective generation of a decahydroquinoline ring with a quaternary carbon at the angular position via domino cyclopropanation, ring-opening, and reduction. Another crucial step is the domino ene-yne metathesis involving a quaternary ammonium ion, leading to the construction of a decahydroazaazulen framework.
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Affiliation(s)
- Tomohiro Kurose
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Chihiro Tsukano
- Graduate School of Agriculture, Kyoto University, Kitashirakawa oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Takeshi Nanjo
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
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7
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Gao W, Wang X, Yao L, Tang B, Mu G, Shi T, Wang Z. Synthesis of an isomer of lycoplanine A via cascade cyclization to construct the spiro-N,O-acetal moiety. Org Biomol Chem 2021; 19:1748-1751. [DOI: 10.1039/d0ob02399j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A 6/10/5/5 tetracyclic isomer of lycoplanine A is synthesized using D–A reaction and cascade cyclization to respectively establish the [9.2.2] pentadecane skeleton and spirocenter, providing sufficient experience to synthesize lycoplanine A.
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Affiliation(s)
- Weiwei Gao
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- China
| | - Xiaodong Wang
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- China
| | - Linbin Yao
- Department of Chemical and Environmental Engineering
- Faculty of Science and Engineering
- The University of Nottingham Ningbo China
- Ningbo
- China
| | - Bencan Tang
- Department of Chemical and Environmental Engineering
- Faculty of Science and Engineering
- The University of Nottingham Ningbo China
- Ningbo
- China
| | - Guohao Mu
- Department of Chemical and Environmental Engineering
- Faculty of Science and Engineering
- The University of Nottingham Ningbo China
- Ningbo
- China
| | - Tao Shi
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- China
| | - Zhen Wang
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- China
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8
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Evolution of Pauson-Khand Reaction: Strategic Applications in Total Syntheses of Architecturally Complex Natural Products (2016–2020). Catalysts 2020. [DOI: 10.3390/catal10101199] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Metal-mediated cyclizations are important transformations in a natural product total synthesis. The Pauson-Khand reaction, particularly powerful for establishing cyclopentenone-containing structures, is distinguished as one of the most attractive annulation processes routinely employed in synthesis campaigns. This review covers Co, Rh, and Pd catalyzed Pauson-Khand reaction and summarizes its strategic applications in total syntheses of structurally complex natural products in the last five years. Additionally, the hetero-Pauson-Khand reaction in the synthesis of heterocycles will also be discussed. Focusing on the panorama of organic synthesis, this review highlights the strategically developed Pauson-Khand reaction in fulfilling total synthetic tasks and its synthetic attractiveness is aimed to be illustrated.
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9
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10
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Abstract
Plants in the Schisandraceae family are important components of the traditional Chinese herbal medicines and are often used to treat various illnesses. Therefore, these Schisandraceae plants are valuable sources for the discovery of new chemical entities for novel therapeutic development. Considerable progress has been made in the identification of bioactive and structurally novel triterpenoids from the Schisandraceae family in the past two decades. In particular, Sun and co-workers have successfully isolated over 100 nortriterpenoids from the Schisandraceae family. Some of these nortriterpenoids have strong inhibitory activities toward hepatitis, tumors, and HIV-1. However, the natural scarcity of these nortriterpenoids in the Schisandraceae plants has hampered their isolation and further biomedical development, and their biosynthesis has not been fully elucidated. It is therefore important and urgent to develop efficient and streamlined total syntheses of these medicinally important nortriterpenoids. Such syntheses will provide sufficient materials for detailed biological studies as well as new synthetic analogues and probe molecules to improve their biological functions and elucidate their mode of actions. However, because of their structural novelty and complexity, the total syntheses of these nortriterpenoid natural products present a significant challenge for synthetic chemists, despite the progress made in organic synthesis, particularly total synthesis, in the 20th century and since the beginning of the 21st century. New synthetic methodologies and strategies therefore need to be invented and developed to facilitate the total syntheses of these nortriterpenoid natural products. With this in mind, our group has spent the last 15 years, ever since the isolation of micrandilactone A (1) by Sun and co-workers in 2003 ( Sun et al. Org. Lett. 2003 , 5 , 1023 - 1026 ), working on synthetic studies with a view to developing methods and strategies for the total syntheses of schinortriterpenoids. Enabling methods such as a thiourea/Pd-catalyzed alkocycarbonylative annulation and a thiourea/Co-catalyzed Pauson-Khand reaction have been developed under these circumstances to form the key ring systems and stereocenters of these complex target molecules. These methodological advances have led us to the first total syntheses of schindilactone A (2), lancifodilactone G acetate (6a), 19-dehydroxyarisandilactone A (9), and propindilactone G (10) with diverse structural features via a branching-oriented strategy. The chemistry developed during our total synthesis campaign has not only helped us to deal with various challenges encountered in the syntheses of the four target molecules, but has also opened up new avenues for synthesizing other naturally occurring schinortriterpenoids and their derivatives, which will likely result in molecules with improved biological functions and tool compounds to enable elucidation of their mechanism of actions or potential cellular targets. This Account highlights the chemistry evolution of our schinortriterpenoid syntheses.
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Affiliation(s)
- Zhen Yang
- Beijing National Laboratory for Molecular Science and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education, College of Chemistry and Molecular Engineering and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
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11
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Ma K, Martin BS, Yin X, Dai M. Natural product syntheses via carbonylative cyclizations. Nat Prod Rep 2019; 36:174-219. [PMID: 29923586 DOI: 10.1039/c8np00033f] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review summarizes the application of various transition metal-catalyzed/mediated carbonylative cyclization reactions in natural product total synthesis.
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Affiliation(s)
- Kaiqing Ma
- Department of Chemistry
- Center for Cancer Research
- Institute for Drug Discovery
- Purdue University
- West Lafayette
| | - Brandon S. Martin
- Department of Chemistry
- Center for Cancer Research
- Institute for Drug Discovery
- Purdue University
- West Lafayette
| | - Xianglin Yin
- Department of Chemistry
- Center for Cancer Research
- Institute for Drug Discovery
- Purdue University
- West Lafayette
| | - Mingji Dai
- Department of Chemistry
- Center for Cancer Research
- Institute for Drug Discovery
- Purdue University
- West Lafayette
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12
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Affiliation(s)
- Lei Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Zhuang Chen
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Xiwu Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
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13
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Kurose T, Tsukano C, Takemoto Y. Synthesis of Octahydro- and Decahydroquinolines by a One-Pot Cascade Reaction of Tetrasubstituted Enecarbamate. Org Lett 2017; 19:4762-4765. [DOI: 10.1021/acs.orglett.7b02122] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tomohiro Kurose
- Graduate School of Pharmaceutical
Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Chihiro Tsukano
- Graduate School of Pharmaceutical
Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical
Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
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14
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Mukai C. Creation of Novel Cyclization Methods Using sp-Hybridized Carbon Units and Syntheses of Bioactive Compounds. Chem Pharm Bull (Tokyo) 2017; 65:511-523. [PMID: 28566644 DOI: 10.1248/cpb.c17-00088] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Some recent results on the development of new and reliable procedures for the construction of diverse ring systems based on the chemistry of sp-hybridized species, especially allene functionality, are described. This review includes: (i) synthesis of the multi-cyclic skeletons by combination of the π-component of allene with suitable other π-components such as alkyne, alkene, or additional allene under Rh-catalyzed conditions; (ii) synthesis of heterocycles as well as carbocycles by reaction of the sp-hybridized center of allene with some nucleophiles in an endo-mode manner; and (iii) total syntheses of natural products and related compounds from the sp-hybridized starting materials.
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Affiliation(s)
- Chisato Mukai
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University
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15
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Zweig JE, Kim DE, Newhouse TR. Methods Utilizing First-Row Transition Metals in Natural Product Total Synthesis. Chem Rev 2017; 117:11680-11752. [PMID: 28525261 DOI: 10.1021/acs.chemrev.6b00833] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
First-row transition-metal-mediated reactions constitute an important and growing area of research due to the low cost, low toxicity, and exceptional synthetic versatility of these metals. Currently, there is considerable effort to replace existing precious-metal-catalyzed reactions with first-row analogs. More importantly, there are a plethora of unique transformations mediated by first-row metals, which have no classical second- or third-row counterpart. Herein, the application of first-row metal-mediated methods to the total synthesis of natural products is discussed. This Review is intended to highlight strategic uses of these metals to realize efficient syntheses and highlight the future potential of these reagents and catalysts in organic synthesis.
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Affiliation(s)
- Joshua E Zweig
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Daria E Kim
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Timothy R Newhouse
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
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16
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Wang FX, Du JY, Wang HB, Zhang PL, Zhang GB, Yu KY, Zhang XZ, An XT, Cao YX, Fan CA. Total Synthesis of Lycopodium Alkaloids Palhinine A and Palhinine D. J Am Chem Soc 2017; 139:4282-4285. [DOI: 10.1021/jacs.6b13401] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fang-Xin Wang
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Ji-Yuan Du
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Hui-Bin Wang
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Peng-Lin Zhang
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Guo-Biao Zhang
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Ke-Yin Yu
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Xiang-Zhi Zhang
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Xian-Tao An
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Ye-Xing Cao
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Chun-An Fan
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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17
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Abd El-Gaber MK, Yasuda S, Iida E, Mukai C. Enantioselective Total Synthesis of (+)-Sieboldine A. Org Lett 2017; 19:320-323. [DOI: 10.1021/acs.orglett.6b03416] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mohammed K. Abd El-Gaber
- Division of Pharmaceutical
Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Shigeo Yasuda
- Division of Pharmaceutical
Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Eisuke Iida
- Division of Pharmaceutical
Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Chisato Mukai
- Division of Pharmaceutical
Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
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18
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Kandepedu N, Abrunhosa-Thomas I, Troin Y. Stereoselective strategies for the construction of polysubstituted piperidinic compounds and their applications in natural products’ synthesis. Org Chem Front 2017. [DOI: 10.1039/c7qo00262a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An abridged and far-reaching review communication on the construction of the polysubstituted piperidinic core using diverse methodologies for the benefit of organic chemists interested in the total synthesis of biologically active compounds.
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Affiliation(s)
- Nishanth Kandepedu
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - Isabelle Abrunhosa-Thomas
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - Yves Troin
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
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19
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Kogure N, Maruyama M, Wongseripipatana S, Kitajima M, Takayama H. New Lycopodine-Type Alkaloids from Lycopodium carinatum. Chem Pharm Bull (Tokyo) 2016; 64:793-9. [PMID: 27020466 DOI: 10.1248/cpb.c16-00171] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The structures of new lycopodine-type alkaloids, lycopocarinamines A-F, which were isolated from Lycopodium carinatum, were elucidated by spectroscopic analysis and chemical conversions. The proposed structure of lycocarinatine A was revised.
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Affiliation(s)
- Noriyuki Kogure
- Graduate School of Pharmaceutical Sciences, Chiba University
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20
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Tian YQ, Hu GW, Guo MQ. Components and Anti-HepG2 Activity Comparison of Lycopodium Alkaloids from Four Geographic Origins. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2016; 2016:4631843. [PMID: 27022402 PMCID: PMC4789059 DOI: 10.1155/2016/4631843] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 02/02/2016] [Accepted: 02/03/2016] [Indexed: 12/18/2022]
Abstract
Lycopodium japonicum Thunb. has attracted great interests due to its rich alkaloids with significant anticancer activity. However, significant chemical differences often exist in a plant species from different geographic origins and affect its quality and bioactivities. Thus, it is urgent to reveal their chemical and biological distinctions at the molecular level. In this context, a comparative chemical analysis of LAs using HPLC-UV-ESI-MS/MS was firstly conducted and resulted in the detection of 46 LAs, 28 of which were identified, and a series of unique LAs markers, such as peaks 2, 9, 10, and 11, were further found to be characteristic LAs and selected as markers from four different origins for their quality control. In parallel, the comparative bioactivity assay revealed that the total LAs from Hubei province exhibited much higher inhibitory rate at 65.95% against HepG2 cells than those at 26.72%, 20.26%, and 33.62% for Kenya, Guangxi province, and Zhejiang province in China, respectively. To this end, significant chemical fingerprinting differences and discrepancies in bioactivity of LAs were explored firstly, which could provide valuable information for quality control and further activity studies on LAs from different sources and promote their better pharmaceutical applications in the future as well.
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Affiliation(s)
- Yong-Qiang Tian
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- Graduate University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guang-Wan Hu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China
| | - Ming-Quan Guo
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China
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21
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Affiliation(s)
- Benjamin M. Williams
- Department of Chemistry; Ludwig-Maximilians-Universität München; 81377 Munich Germany
| | - Dirk Trauner
- Department of Chemistry; Ludwig-Maximilians-Universität München; 81377 Munich Germany
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22
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Williams BM, Trauner D. Expedient Synthesis of (+)-Lycopalhine A. Angew Chem Int Ed Engl 2016; 55:2191-4. [PMID: 26748762 DOI: 10.1002/anie.201509602] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Indexed: 11/09/2022]
Abstract
Two amino acids play a key role in the first total synthesis of lycopalhine A. L-glutamic acid serves as a convenient chiral starting material for the 13-step synthesis, and l-proline promotes an unusual 5-endo-trig Mannich cyclization that generates the central pyrrolidine ring of the Lycopodium alkaloid. The bicyclo[3.3.0]octanol moiety of the molecule is formed through an intramolecular aldol addition that may occur spontaneously in nature.
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Affiliation(s)
- Benjamin M Williams
- Department of Chemistry, Ludwig-Maximilians-Universität München, 81377, Munich, Germany
| | - Dirk Trauner
- Department of Chemistry, Ludwig-Maximilians-Universität München, 81377, Munich, Germany.
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23
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Liu YC, Fan M, Jiang WW, Liu F, Wu XD, He J, Cheng X, Peng LY, Su J, Zhang ZJ, Zhao QS. Four new fawcettimine-related alkaloids from Phlegmariurus squarrosus. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2015; 17:967-975. [PMID: 26287979 DOI: 10.1080/10286020.2015.1043281] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Four new fawcettimine-related alkaloids (1-4), together with 17 known ones, were isolated from club moss Phlegmariurus squarrosus. Notably, compound 1 was the derivative of lycoflexine with an unprecedented additional methyl group at C-17. Their structures were determined by extensive spectroscopic analysis, including 1D and 2D NMR, and HR-MS, as well as by comparison with the literature data. All new compounds were tested for their β-site amyloid precursor protein (APP)-cleaving enzyme 1 (BACE1) and acetylcholinesterase (AChE) inhibitory activities.
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Affiliation(s)
- Yu-Chen Liu
- a State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650204 , China
- b University of the Chinese Academy of Sciences , Beijing 100049 , China
| | - Min Fan
- a State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650204 , China
- b University of the Chinese Academy of Sciences , Beijing 100049 , China
| | - Wei-Wei Jiang
- a State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650204 , China
- b University of the Chinese Academy of Sciences , Beijing 100049 , China
| | - Fei Liu
- a State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650204 , China
- b University of the Chinese Academy of Sciences , Beijing 100049 , China
| | - Xing-De Wu
- a State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650204 , China
| | - Juan He
- a State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650204 , China
| | - Xiao Cheng
- a State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650204 , China
| | - Li-Yan Peng
- a State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650204 , China
| | - Jia Su
- a State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650204 , China
| | - Zhi-Jun Zhang
- a State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650204 , China
| | - Qin-Shi Zhao
- a State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650204 , China
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24
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Chen JP, He W, Yang ZY, Yao ZJ. Synthesis of Tricyclo[4,3,1,01,5]decane Core of Plumisclerin A Using Pauson–Khand Annulation and SmI2-Mediated Radical Cyclization. Org Lett 2015; 17:3379-81. [DOI: 10.1021/acs.orglett.5b01563] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ji-Peng Chen
- State Key Laboratory of Bioorganic
and Natural Products Chemistry, Collaborative Innovation Center of
Chemistry for Life Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Wei He
- State Key Laboratory of Bioorganic
and Natural Products Chemistry, Collaborative Innovation Center of
Chemistry for Life Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Zhen-Yu Yang
- State Key Laboratory of Bioorganic
and Natural Products Chemistry, Collaborative Innovation Center of
Chemistry for Life Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Zhu-Jun Yao
- State Key Laboratory of Bioorganic
and Natural Products Chemistry, Collaborative Innovation Center of
Chemistry for Life Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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25
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Mukai C, Arima K, Hirata S, Yasuda S. Synthesis of a carbon analogue of scytonemin. Chem Pharm Bull (Tokyo) 2015; 63:273-7. [PMID: 25832021 DOI: 10.1248/cpb.c14-00838] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The synthesis of a carbon analogue of scytonemin was accomplished on the basis of molybdenum-mediated intramolecular double Pauson-Khand type reaction of bis(allenyne), followed by the double aldol condensation of the formed double Pauson-Khand type adduct.
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Affiliation(s)
- Chisato Mukai
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University
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26
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Zeng C, Zhao J, Zhao G. Enantioselective divergent total syntheses of fawcettimine-type Lycopodium alkaloids. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.11.041] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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27
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28
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29
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Ishida H, Kimura S, Kogure N, Kitajima M, Takayama H. The first asymmetric total synthesis of lycoposerramine-R. Org Biomol Chem 2015; 13:7762-71. [DOI: 10.1039/c5ob00827a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The first asymmetric total synthesis of lycoposerramine-R was accomplished by a strategy featuring the stereoselective intramolecular aldol cyclization giving a cis-fused 5/6 bicyclic skeleton and a new method for the construction of the pyridone ring via the aza-Wittig reaction, thereby establishing the absolute configuration of the natural product.
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Affiliation(s)
- Hiroaki Ishida
- Graduate School of Pharmaceutical Sciences
- Chiba University
- Chiba 260-8675
- Japan
| | - Shinya Kimura
- Graduate School of Pharmaceutical Sciences
- Chiba University
- Chiba 260-8675
- Japan
| | - Noriyuki Kogure
- Graduate School of Pharmaceutical Sciences
- Chiba University
- Chiba 260-8675
- Japan
| | - Mariko Kitajima
- Graduate School of Pharmaceutical Sciences
- Chiba University
- Chiba 260-8675
- Japan
| | - Hiromitsu Takayama
- Graduate School of Pharmaceutical Sciences
- Chiba University
- Chiba 260-8675
- Japan
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30
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Orgué S, León T, Riera A, Verdaguer X. Asymmetric Intermolecular Cobalt-Catalyzed Pauson–Khand Reaction Using a P-Stereogenic Bis-phosphane. Org Lett 2014; 17:250-3. [DOI: 10.1021/ol503329g] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Sílvia Orgué
- Institute for Research in Biomedicine (IRB Barcelona), Baldiri Reixac 10, 08028 Barcelona, Spain
| | - Thierry León
- Institute for Research in Biomedicine (IRB Barcelona), Baldiri Reixac 10, 08028 Barcelona, Spain
| | - Antoni Riera
- Institute for Research in Biomedicine (IRB Barcelona), Baldiri Reixac 10, 08028 Barcelona, Spain
- Departament
de Química Orgànica, Universitat de Barcelona, Martí
i Franquès 1, 08028 Barcelona, Spain
| | - Xavier Verdaguer
- Institute for Research in Biomedicine (IRB Barcelona), Baldiri Reixac 10, 08028 Barcelona, Spain
- Departament
de Química Orgànica, Universitat de Barcelona, Martí
i Franquès 1, 08028 Barcelona, Spain
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31
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Fager-Jokela E, Muuronen M, Khaizourane H, Vázquez-Romero A, Verdaguer X, Riera A, Helaja J. Regioselectivity of Intermolecular Pauson–Khand Reaction of Aliphatic Alkynes: Experimental and Theoretical Study of the Effect of Alkyne Polarization. J Org Chem 2014; 79:10999-1010. [DOI: 10.1021/jo502035t] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Erika Fager-Jokela
- Laboratory
of Organic Chemistry, Department of Chemistry, University of Helsinki, A. I. Virtasen aukio 1, P.O. Box 55, University
of Helsinki FIN-00014, Finland
| | - Mikko Muuronen
- Laboratory
of Organic Chemistry, Department of Chemistry, University of Helsinki, A. I. Virtasen aukio 1, P.O. Box 55, University
of Helsinki FIN-00014, Finland
| | - Héléa Khaizourane
- Institute for Research in Biomedicine (IRB Barcelona), Baldiri Reixac, 10, Barcelona 08028, Spain
| | - Ana Vázquez-Romero
- Institute for Research in Biomedicine (IRB Barcelona), Baldiri Reixac, 10, Barcelona 08028, Spain
| | - Xavier Verdaguer
- Institute for Research in Biomedicine (IRB Barcelona), Baldiri Reixac, 10, Barcelona 08028, Spain
- Departament
de Química Orgànica, Universitat de Barcelona, Martí
i Franquès, 1-11, Barcelona 08028, Spain
| | - Antoni Riera
- Institute for Research in Biomedicine (IRB Barcelona), Baldiri Reixac, 10, Barcelona 08028, Spain
- Departament
de Química Orgànica, Universitat de Barcelona, Martí
i Franquès, 1-11, Barcelona 08028, Spain
| | - Juho Helaja
- Laboratory
of Organic Chemistry, Department of Chemistry, University of Helsinki, A. I. Virtasen aukio 1, P.O. Box 55, University
of Helsinki FIN-00014, Finland
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32
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García JM, Odriozola JM, Razkin J, Lapuerta I, Odriozola A, Urruzuno I, Vera S, Oiarbide M, Palomo C. Catalytic Enantioselective Quick Route to Aldol-Tethered 1,6- and 1,7-Enynes from ω-Unsaturated Aldehydes. Chemistry 2014; 20:15543-54. [DOI: 10.1002/chem.201404452] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Indexed: 11/07/2022]
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33
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Zhang LD, Zhou TT, Qi SX, Xi J, Yang XL, Yao ZJ. Total Syntheses of Lycoposerramine-V and 5-epi-Lycoposerramine-V. Chem Asian J 2014; 9:2740-4. [DOI: 10.1002/asia.201402614] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Indexed: 01/30/2023]
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34
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Zaimoku H, Taniguchi T. Redox Divergent Synthesis of Fawcettimine-TypeLycopodiumAlkaloids. Chemistry 2014; 20:9613-9. [DOI: 10.1002/chem.201403163] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Indexed: 11/06/2022]
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35
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Hagendorn T, Bräse S. A new route to dithia- and thiaoxacyclooctynes via Nicholas reaction. RSC Adv 2014. [DOI: 10.1039/c4ra01345j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
By using the Nicholas reaction we managed to design a concise synthesis that only uses three steps to build the eight-membered ring. It was also possible to functionalize said alkyne with a fluorophore.
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Affiliation(s)
- Tobias Hagendorn
- Institute of Organic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe, Germany
| | - Stefan Bräse
- Institute of Organic Chemistry
- Karlsruhe Institute of Technology
- 76131 Karlsruhe, Germany
- Institute of Toxicology and Genetics
- KIT
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36
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Xu K, Cheng B, Li Y, Xu T, Yu C, Zhang J, Ma Z, Zhai H. Stereocontrolled Total Syntheses of (±)-Fawcettimine, (±)-Lycoflexine, and (±)-Lycoflexine N-Oxide. Org Lett 2013; 16:196-9. [DOI: 10.1021/ol403185g] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ke Xu
- The
State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Bin Cheng
- The
State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Yun Li
- The
State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Tingting Xu
- The
State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Cunming Yu
- The
State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Jun Zhang
- The
State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Zhiqiang Ma
- Division
of Chemistry, Department of Biochemistry, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Hongbin Zhai
- The
State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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37
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Zeng C, Zheng C, Zhao J, Zhao G. Divergent total syntheses of (-)-lycopladine D, (+)-fawcettidine, and (+)-lycoposerramine Q. Org Lett 2013; 15:5846-9. [PMID: 24188014 DOI: 10.1021/ol402906y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enantioselective total syntheses of (+)-fawcettidine and (+)-lycoposerramine Q as well as the first total synthesis of (-)-lycopladine D from a common intermediate have been accomplished by a divergent path. The common intermediate was derived from a Hajos-Parrish-like diketone by a stereoselective Birch reduction and a Suzuki coupling. The synthesis of (-)-lycopladine D featured an allylic oxidation and a biomimetic aminoketalization while the route to (+)-fawcettidine and (+)-lycoposerramine Q highlighted an oxidative rearrangement.
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Affiliation(s)
- Chen Zeng
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, China
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38
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Hou SH, Tu YQ, Liu L, Zhang FM, Wang SH, Zhang XM. Divergent and Efficient Syntheses of theLycopodiumAlkaloids (−)-Lycojaponicumin C, (−)-8-Deoxyserratinine, (+)-Fawcettimine, and (+)-Fawcettidine. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306369] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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39
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Hou SH, Tu YQ, Liu L, Zhang FM, Wang SH, Zhang XM. Divergent and Efficient Syntheses of theLycopodiumAlkaloids (−)-Lycojaponicumin C, (−)-8-Deoxyserratinine, (+)-Fawcettimine, and (+)-Fawcettidine. Angew Chem Int Ed Engl 2013; 52:11373-6. [DOI: 10.1002/anie.201306369] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Indexed: 11/10/2022]
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40
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Shi LL, Shen HJ, Fang LC, Huang J, Li CC, Yang Z. Development of an expedient intramolecular Pauson–Khand reaction approach to stereoselectively construct the trans-decalin with a C1 quaternary chiral center. Chem Commun (Camb) 2013; 49:8806-8. [DOI: 10.1039/c3cc45170d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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