1
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Chen CM, Lin SK, Hsieh CT, Reddy JS, Teoh YN, Cheng MJ, Hsieh HP. Influence of Ring Strain on the Formation of Rearrangement vs Cyclization Isotwistane Products in the Acyl Radical Reaction of Bicyclo[2.2.2]octanone. Org Lett 2023; 25:7757-7762. [PMID: 37738398 PMCID: PMC10630961 DOI: 10.1021/acs.orglett.3c02374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Indexed: 09/24/2023]
Abstract
An acyl radical reaction of bicyclo[2.2.2]octenone to yield either rearranged or cyclized isotwistane products is described. The influence of ring strain on the reaction was demonstrated by alternating the sizes of the fused ring in the starting material. DFT calculations showed that the reaction is under thermodynamic control and proceeds via a 5-exo-trig cyclization intermediate, which undergoes either hydrogen-atom transfer (HAT) to give a cyclized product or rearrangement via a twistane intermediate to give a rearranged product.
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Affiliation(s)
- Chih-Ming Chen
- Institute
of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 350, Taiwan, ROC
| | - Sheng-Kuo Lin
- Institute
of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 350, Taiwan, ROC
- Department
of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan, ROC
| | - Chi-Tien Hsieh
- Department
of Chemistry, National Cheng Kung University, Tainan 701, Taiwan, ROC
| | - Julakanti Satyanarayana Reddy
- Institute
of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 350, Taiwan, ROC
| | - Yi Ning Teoh
- Institute
of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 350, Taiwan, ROC
- Department
of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan, ROC
| | - Mu-Jeng Cheng
- Department
of Chemistry, National Cheng Kung University, Tainan 701, Taiwan, ROC
| | - Hsing-Pang Hsieh
- Institute
of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli County 350, Taiwan, ROC
- Department
of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan, ROC
- Biomedical
Translation Research Center, Academia Sinica, Taipei City 115, Taiwan, ROC
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2
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Qin X, Zou N, Nong C, Mo D. Recent Advances on the Synthesis of Nine-Membered N-Heterocycles. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202206035] [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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3
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Chen C, Hsieh H. Recent advances in total synthesis of natural products by masked
ortho
‐benzoquinones. J CHIN CHEM SOC-TAIP 2022. [DOI: 10.1002/jccs.202200276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chih‐Ming Chen
- Institute of Biotechnology and Pharmaceutical Research National Health Research Institutes Zhunan Taiwan
- Biomedical Translation Research Center Academia Sinica Taipei City Taiwan
| | - Hsing‐Pang Hsieh
- Institute of Biotechnology and Pharmaceutical Research National Health Research Institutes Zhunan Taiwan
- Biomedical Translation Research Center Academia Sinica Taipei City Taiwan
- Department of Chemistry National Tsing Hua University Hsinchu Taiwan
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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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Hsu D, Hwang T. Stereoselective Formal Synthesis of Platencin. ChemistrySelect 2022. [DOI: 10.1002/slct.202103794] [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)
- Day‐Shin Hsu
- Department of Chemistry and Biochemistry National Chung Cheng University Minhsiung, Chiayi Taiwan 62102
| | - Tai‐Yun Hwang
- Department of Chemistry and Biochemistry National Chung Cheng University Minhsiung, Chiayi Taiwan 62102
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6
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Qin X, Zou N, Cheng X, Liang C, Mo D. Synthesis of Chiral Nine‐Membered N‐Heterocycles through Silver(I)‐Promoted Cycloaddition and Rearrangement from
N
‐Vinyl‐α,β‐Unsaturated Nitrones with Chiral 3‐Propioloyloxazolidin‐2‐Ones. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Xiao‐Ting Qin
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Collaborative Innovation Center for Guangxi Ethnic Medicine School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004, People's Republic of China
| | - Ning Zou
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Collaborative Innovation Center for Guangxi Ethnic Medicine School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004, People's Republic of China
| | - Xiao‐Ling Cheng
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Collaborative Innovation Center for Guangxi Ethnic Medicine School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004, People's Republic of China
| | - Cui Liang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Collaborative Innovation Center for Guangxi Ethnic Medicine School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004, People's Republic of China
| | - Dong‐Liang Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Collaborative Innovation Center for Guangxi Ethnic Medicine School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004, People's Republic of China
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7
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Qu P, Snyder SA. Concise and Stereoselective Total Syntheses of Annotinolides C, D, and E. J Am Chem Soc 2021; 143:11951-11956. [PMID: 34338524 PMCID: PMC8397315 DOI: 10.1021/jacs.1c05942] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
![]()
The annotinolides are one of the
most recent additions to the Lycopodium family of
alkaloids, with its members possessing
challenging, caged structures that include a [3.2.1]-bicyclic core
bearing six contiguous stereocenters, including four that are fully
substituted. Herein, we document a concise and stereoselective route
that achieves the first total syntheses of three of its members: annotinolides
C, D, and E. Key operations include a gold(I)-catalyzed Conia-ene
reaction that fashions much of the main core in a single operation,
as well as a number of other challenging and chemoselective transformations
to generate the remaining elements. Moreover, efforts utilizing the
natural products themselves, seeking adjustments in their oxidation
states and the rearrangement of individual ring systems, shed light
on their potential biogenesis with some outcomes counter to those
originally proposed. Finally, formal enantioenriched syntheses of
the target molecules are also presented.
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Affiliation(s)
- Pei Qu
- Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Scott A Snyder
- Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
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8
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Nakhla MC, Cook CD, Wood JL. Synthetic studies towards (±)-isopalhinine A: Preparation of the bicyclic core via Nazarov cyclization. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Affiliation(s)
- Dominik Gaugele
- Eberhard Karls Universität Tübingen Institut für Organische Chemie Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Martin E. Maier
- Eberhard Karls Universität Tübingen Institut für Organische Chemie Auf der Morgenstelle 18 72076 Tübingen Germany
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10
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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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11
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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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12
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Strategies and Efforts towards the Total Synthesis of Palhinine Alkaloids. Molecules 2020; 25:molecules25184211. [PMID: 32937904 PMCID: PMC7570941 DOI: 10.3390/molecules25184211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 09/10/2020] [Accepted: 09/10/2020] [Indexed: 11/17/2022] Open
Abstract
The palhinine family of Lycopodium alkaloids were first reported in 2010, which feature an intriguing isotwistane carbon cage and a nine-membered azonane ring. It is noteworthy that the tetracyclic 5/6/6/9 skeleton was unprecedented in Lycopodium alkaloids before their seminal discovery. Over the past decade, extensive synthetic efforts stemming from seven research groups have resulted in two racemic total syntheses to date. This review article takes the opportunity to survey these efforts and achievements so as to promote further research towards the asymmetric total synthesis of palhinine alkaloids.
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13
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Abstract
Previously, we have finished the total synthesis of lycojaponicumin A (2) via development of an efficient synthetic strategy using semipinacol rearrangement as a key step. In order to further demonstrate the generality of this synthetic route, herein, we report the total synthesis of another fawcettimine-type alkaloid sieboldine A (1) from the same intermediate, which possesses an A/B/D tricyclic ring system and vicinal quaternary centers of 1. The synthesis features late-stage site-selective redox reactions, Schmidt glycosylation cyclization, and highly selective transformations.
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Affiliation(s)
- Hui Shao
- School of Chemistry and Chemical Engineering, Frontiers Science Center of Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.,Key Laboratory of Applied Surface and Colloid Chemistry & School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Yun-Peng Wang
- School of Chemistry and Chemical Engineering, Frontiers Science Center of Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Kun Fang
- School of Chemistry and Chemical Engineering, Frontiers Science Center of Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Yu-Ming Zhao
- Key Laboratory of Applied Surface and Colloid Chemistry & School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Yong-Qiang Tu
- School of Chemistry and Chemical Engineering, Frontiers Science Center of Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
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14
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Bonjoch J, Diaba F. Radical Reactions in Alkaloid Synthesis: A Perspective from Carbon Radical Precursors. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000391] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Josep Bonjoch
- Laboratori de Química Orgànica Facultat de Farmàcia, IBUB Universitat de Barcelona Av. Joan XXIII s/n 08028 Barcelona Spain
| | - Faiza Diaba
- Laboratori de Química Orgànica Facultat de Farmàcia, IBUB Universitat de Barcelona Av. Joan XXIII s/n 08028 Barcelona Spain
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15
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Zhu QF, Zhao QS. Chemical constituents and biological activities of lycophytes and ferns. Chin J Nat Med 2020; 17:887-891. [PMID: 31882041 DOI: 10.1016/s1875-5364(19)30108-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Indexed: 11/17/2022]
Abstract
Lycophytes and ferns are unique and charismatic members of many terrestrial ecosystems and occupy the pivotal position in land plant origin and evolution. The Chinese lycophytes and ferns flora, with approximately 2000 species, contributes a substantial component to the global lycophytes and ferns diversity, with estimates of 12 000 species. Among them, about 433 species are medicinally recorded and researches based on their phytochemical properties are important topics in natural medicines. This paper reviewed the research history and current status of chemical constituents and biological activities of lycophytes and ferns, which had highlighted the research progress of our group.
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Affiliation(s)
- Qin-Feng Zhu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Qin-Shi Zhao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
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16
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Shao H, Fang K, Wang YP, Zhang XM, Ding TM, Zhang SY, Chen ZM, Tu YQ. Total Synthesis of Fawcettimine-Type Alkaloid, Lycojaponicumin A. Org Lett 2020; 22:3775-3779. [PMID: 32330061 DOI: 10.1021/acs.orglett.0c00961] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The efficient total synthesis of lycojaponicumin A (1) has been accomplished for the first time. The remarkable features of this novel strategy include the following: (1) rapid construction of tricyclic intermediate 4 through a regio- and stereoselective semipinacol ring expansion, which simplified the construction of rings A and B of 1; (2) the subsequent regio- and stereoselective formation of the highly strained rings C-E of 1 through a tandem oxa-hetero [3 + 2] cycloaddition/N-cycloalkylation.
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Affiliation(s)
- Hui Shao
- School of Chemistry and Chemical Engineering, Frontiers Science Center of Transformative Molecules, Shanghai Jiao Tong University, Shanghai, P. R. China, 200240
| | - Kun Fang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, P. R. China, 730000
| | - Yun-Peng Wang
- School of Chemistry and Chemical Engineering, Frontiers Science Center of Transformative Molecules, Shanghai Jiao Tong University, Shanghai, P. R. China, 200240
| | - Xiao-Ming Zhang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, P. R. China, 730000
| | - Tong-Mei Ding
- School of Chemistry and Chemical Engineering, Frontiers Science Center of Transformative Molecules, Shanghai Jiao Tong University, Shanghai, P. R. China, 200240
| | - Shu-Yu Zhang
- School of Chemistry and Chemical Engineering, Frontiers Science Center of Transformative Molecules, Shanghai Jiao Tong University, Shanghai, P. R. China, 200240
| | - Zhi-Min Chen
- School of Chemistry and Chemical Engineering, Frontiers Science Center of Transformative Molecules, Shanghai Jiao Tong University, Shanghai, P. R. China, 200240
| | - Yong-Qiang Tu
- School of Chemistry and Chemical Engineering, Frontiers Science Center of Transformative Molecules, Shanghai Jiao Tong University, Shanghai, P. R. China, 200240.,State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, P. R. China, 730000
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17
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Han C, Chen Y, Ching YC, Lee CS, He S. An approach towards the construction of the tetracyclic skeleton of palhinine alkaloids. Org Chem Front 2020. [DOI: 10.1039/d0qo00554a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A bifunctional Lewis acid catalyzed Diels–Alder/carbocyclization cascade process was developed for the rapid construction of the tetracyclic core of palhinine alkaloids.
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Affiliation(s)
- Congcong Han
- School of Pharmaceutical Sciences
- and Guizhou Engineering Laboratory for Synthetic Drugs
- Guizhou University
- Guiyang
- China
| | - Yang Chen
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering
- Key Laboratory of Green Pesticide and Agricultural Bioengineering
- Ministry of Education
- Guizhou University
- Guiyang 550025
| | - Yin-Cheung Ching
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- Hong Kong SAR
| | - Chi-Sing Lee
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- Hong Kong SAR
| | - Shuzhong He
- School of Pharmaceutical Sciences
- and Guizhou Engineering Laboratory for Synthetic Drugs
- Guizhou University
- Guiyang
- China
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18
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Ma X, Nong C, Zhao J, Lu X, Liang C, Mo D. Yb(OTf)
3
‐Catalyzed Cycloaddition/[3,3]‐Rearrangement of
N
‐Vinyl‐α,β‐Unsaturated Ketonitrones with Methylenecycloprop‐anes: Stereoselective Synthesis of Nine‐Membered Nitrogen Heterocycles. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901206] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Xiao‐Pan Ma
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China; School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004 People's Republic of China
| | - Cai‐Mei Nong
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China; School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004 People's Republic of China
| | - Jie Zhao
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China; School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004 People's Republic of China
| | - Xiuqiang Lu
- Fuqing Branch of Fujian Normal University, Fuzhou Fujian 350300 People's Republic of China
| | - Cui Liang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China; School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004 People's Republic of China
| | - Dong‐Liang Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China; School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004 People's Republic of China
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19
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Burtea A, DeForest J, Li X, Rychnovsky SD. Total Synthesis of (-)-Himeradine A. Angew Chem Int Ed Engl 2019; 58:16193-16197. [PMID: 31491044 DOI: 10.1002/anie.201910129] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Indexed: 01/09/2023]
Abstract
(-)-Himeradine A is a complex lycopodium alkaloid with seven rings and ten stereogenic centers that shows anticancer activity against lymphoma L1210 cells. A total synthesis has been developed that builds off prior work on (+)-fastigiatine. A 2,4,6-trisubstitited piperidine ring forms the core of the quinolizidine segment, and was prepared by diastereoselective reduction of a pyridine and classic resolution of an intermediate. The remaining secondary amine was introduced with a catalyst-controlled Overman rearrangement. The piperidine segment was coupled in a B-alkyl Suzuki reaction with a bicyclic bromoenone, which was a key intermediate for the synthesis of (+)-fastigiatine. The final transformation featured a transannular Mannich reaction and cyclization to complete the quinolizidine. Five bonds and four new rings were generated in this one-pot procedure. (-)-Himeradine A was prepared in 17 steps in the longest linear sequence.
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Affiliation(s)
- Alexander Burtea
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, Irvine, CA, 92697, USA
| | - Jacob DeForest
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, Irvine, CA, 92697, USA
| | - Xinting Li
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, Irvine, CA, 92697, USA
| | - Scott D Rychnovsky
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, Irvine, CA, 92697, USA
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20
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Burtea A, DeForest J, Li X, Rychnovsky SD. Total Synthesis of (−)‐Himeradine A. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201910129] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Alexander Burtea
- Department of Chemistry1102 Natural Sciences IIUniversity of California, Irvine Irvine CA 92697 USA
| | - Jacob DeForest
- Department of Chemistry1102 Natural Sciences IIUniversity of California, Irvine Irvine CA 92697 USA
| | - Xinting Li
- Department of Chemistry1102 Natural Sciences IIUniversity of California, Irvine Irvine CA 92697 USA
| | - Scott D. Rychnovsky
- Department of Chemistry1102 Natural Sciences IIUniversity of California, Irvine Irvine CA 92697 USA
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21
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Lu SC, Liang YY, Li L, Wang XL, Zhang SP, Gong YL, Xu S. Synthesis of the Tricyclic Caged Core of Palhinine Alkaloids Based on a Non-Diels-Alder-Type Strategy. Org Lett 2019; 21:5567-5569. [PMID: 31241967 DOI: 10.1021/acs.orglett.9b01898] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A concise synthesis of the tricyclo[4.3.1.03,7]decane caged core of palhinine alkaloids was developed with SmI2-mediated cyclization and light-initiated radical addition-fragmentation as key steps. Compared with the reported racemic routes which are all based on Diels-Alder-type key reactions, our strategy would be more readily accessible to the asymmetric total syntheses of the palhinine alkaloids.
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Affiliation(s)
- Shi-Chao Lu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , 2A NanWei Road , Xicheng District, Beijing 100050 , China
| | - Yu-Yan Liang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , 2A NanWei Road , Xicheng District, Beijing 100050 , China
| | - Liang Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , 2A NanWei Road , Xicheng District, Beijing 100050 , China
| | - Xiao-Lei Wang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , 2A NanWei Road , Xicheng District, Beijing 100050 , China
| | - Shi-Peng Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , 2A NanWei Road , Xicheng District, Beijing 100050 , China
| | - Ya-Ling Gong
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , 2A NanWei Road , Xicheng District, Beijing 100050 , China
| | - Shu Xu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , 2A NanWei Road , Xicheng District, Beijing 100050 , China
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