1
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Kang G, Park S, Han S. Synthesis of High-Order and High-Oxidation State Securinega Alkaloids. Acc Chem Res 2023; 56:140-156. [PMID: 36594722 DOI: 10.1021/acs.accounts.2c00719] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Securinega alkaloids, composed of more than 100 members characterized by the compact tetracyclic scaffold, have fascinated the synthetic community with their structural diversity and notable bioactivities. On the basis of the structural phenotype, oligomerizations and oxidations are major biosynthetic diversification modes of the basic Securinega framework. Despite the rich history of synthesis of basic monomeric Securinega alkaloids, the synthesis of oligomeric Securinega alkaloids, as well as oxidized derivatives, has remained relatively unexplored because of their extra structural complexity. In the first half of this Account, our synthetic studies toward high-order Securinega alkaloids are described. We aimed to establish a reliable synthetic method to form C14-C15' and C12-C15' bonds, which are prevalent connection modes between monomers. During our total synthesis of flueggenine C (9), we have invented an accelerated Rauhut-Currier reaction capable of forming the C14-C15' bond stereoselectively. Installation of the nucleophilic functionality to the Michael acceptor, which ushers the C-C bond forming conjugate addition to follow the intramolecular pathway, was the key to success. The C12-C15' linkage, which was inaccessible via an accelerated Rauhut-Currier reaction, was established by devising a complementary cross-coupling/conjugate reduction-based dimerization strategy that enabled the total synthesis of flueggenines D (11) and I (14). In this approach, the C12-C15' linkage was established via a Stille cross-coupling, and the stereochemistry of the C15' position was controlled during the following conjugate reduction step. In the later half of this Account, our achievements in the field of high-oxidation state Securinega alkaloids synthesis are depicted. We have developed oxidative transformations at the N1 and C2-C4 positions, where the biosynthetic oxidation event occurs most frequently. The discovery of a VO(acac)2-mediated regioselective Polonovski reaction allowed us to access the key 2,3-dehydroallosecurinine (112). Divergent synthesis of secu'amamine A (62) and fluvirosaones A (60) and B (61) was accomplished by exploiting the versatile reactivities of the C2/C3 enamine moiety in 112. We have also employed a fragment-coupling strategy between menisdaurilide and piperidine units, which allowed the installation of various oxygen-containing functionality on the piperidine ring. Combined with the late-stage, light-mediated epimerization and well-orchestrated oxidative modifications, collective total synthesis of seven C4-oxygenated securinine-type natural products was achieved. Lastly, the synthesis of flueggeacosine B (70) via two synthetic routes from allosecurinine (103) was illustrated. The first-generation synthesis (seven overall steps) employing Pd-catalyzed cross-coupling between stannane and thioester to form the key C3-C15' bond enabled the structural revision of the natural product. In the second-generation synthesis, we have invented visible-light-mediated, Cu-catalyzed cross-dehydrogenative coupling (CDC) between an aldehyde and electron-deficient olefin, which streamlined the synthetic pathway into four overall steps. Organisms frequently utilize dimerization (oligomerization) and oxidations during the biosynthesis as a means to expand the chemical space of their secondary metabolites. Therefore, methods and strategies for dimerizations and oxidations that we have developed using the Securinega alkaloids as a platform would be broadly applicable to other alkaloids. It is our sincere hope that lessons we have learned during our synthetic journey would benefit other chemists working on organic synthesis.
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Affiliation(s)
- Gyumin Kang
- Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Sangbin Park
- Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Sunkyu Han
- Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 34141, Republic of Korea
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2
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Deng Y, Shi X, Shi G, Lu X, Luo J, Deng L. One-Step Asymmetric Construction of 1,4-Stereocenters via Tandem Mannich-Isomerization Reactions Mediated by a Dual-Functional Betaine Catalyst. JACS AU 2022; 2:2678-2685. [PMID: 36590254 PMCID: PMC9795573 DOI: 10.1021/jacsau.2c00465] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 11/07/2022] [Accepted: 11/08/2022] [Indexed: 06/17/2023]
Abstract
The construction of chiral motifs containing nonadjacent stereocenters stands out as a major challenge as they are usually constructed in separate steps utilizing different chiral catalysts. Therefore, the development of new strategies to streamline the construction of such complex motifs has become a major focus of asymmetric synthesis. We report here an unprecedented asymmetric tandem Mannich-isomerization reaction that allows the direct construction of 1,4-stereocenters in a highly stereoselective manner. This asymmetric transformation demonstrated the potential of a tandem nucleophilic addition-isomerization reaction as a broadly useful strategy for the efficient construction of 1,4-stereocenters. Notably, this tandem reaction was mediated by a single chiral betaine as a dual-functional catalyst, promoting first an enantioselective intermolecular C-C bond forming reaction and next a stereoselective intramolecular 1,3-proton transfer reaction.
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Affiliation(s)
- Yu Deng
- Key
Laboratory of Precise Synthesis of Functional Molecules of Zhejiang
Province, Department of Chemistry, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province China
- Department
of Chemistry, Brandeis University, Waltham, Massachusetts 02454-9110, United States
| | - Xiaohuo Shi
- Key
Laboratory of Precise Synthesis of Functional Molecules of Zhejiang
Province, School of Science, Instrumentation and Service Center for
Molecular Sciences, Westlake University, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
| | - Guangfa Shi
- Key
Laboratory of Precise Synthesis of Functional Molecules of Zhejiang
Province, Department of Chemistry, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province China
| | - Xingyu Lu
- Key
Laboratory of Precise Synthesis of Functional Molecules of Zhejiang
Province, School of Science, Instrumentation and Service Center for
Molecular Sciences, Westlake University, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
| | - Jisheng Luo
- Key
Laboratory of Precise Synthesis of Functional Molecules of Zhejiang
Province, Department of Chemistry, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province China
| | - Li Deng
- Key
Laboratory of Precise Synthesis of Functional Molecules of Zhejiang
Province, Department of Chemistry, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province China
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3
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Yeshi K, Turpin G, Jamtsho T, Wangchuk P. Indigenous Uses, Phytochemical Analysis, and Anti-Inflammatory Properties of Australian Tropical Medicinal Plants. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27123849. [PMID: 35744969 PMCID: PMC9231311 DOI: 10.3390/molecules27123849] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 06/07/2022] [Accepted: 06/11/2022] [Indexed: 11/16/2022]
Abstract
Australian tropical plants have been a rich source of food (bush food) and medicine to the first Australians (Aboriginal people), who are believed to have lived for more than 50,000 years. Plants such as spreading sneezeweed (Centipeda minima), goat’s foot (Ipomoea pes-caprae), and hop bush (Dodonaea viscosa and D. polyandra) are a few popular Aboriginal medicinal plants. Thus far, more than 900 medicinal plants have been recorded in the tropical region alone, and many of them are associated with diverse ethnomedicinal uses that belong to the traditional owners of Aboriginal people. In our effort to find anti-inflammatory lead compounds in collaboration with Aboriginal communities from their medicinal plants, we reviewed 78 medicinal plants used against various inflammation and inflammatory-related conditions by Aboriginal people. Out of those 78 species, we have included only 45 species whose crude extracts or isolated pure compounds showed anti-inflammatory properties. Upon investigating compounds isolated from 40 species (for five species, only crude extracts were studied), 83 compounds were associated with various anti-inflammatory properties. Alphitolic acid, Betulinic acid, Malabaric acid, and Hispidulin reduced proinflammatory cytokines and cyclooxygenase enzymes (COX-1 and 2) with IC50 values ranging from 11.5 to 46.9 uM. Other promising anti-inflammatory compounds are Brevilin A (from Centipeda minima), Eupalestin, and 5′-methoxy nobiletin (from Ageratum conyzoides), Calophyllolide (from Calophyllum inophyllum), and Brusatol (from Brucea javanica). D. polyandra is one example of an Aboriginal medicinal plant from which a novel anti-inflammatory benzoyl ester clerodane diterpenoid compound was obtained (compound name not disclosed), and it is in the development of topical medicines for inflammatory skin diseases. Medicinal plants in the tropics and those associated with indigenous knowledge of Aboriginal people could be a potential alternative source of novel anti-inflammatory therapeutics.
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Affiliation(s)
- Karma Yeshi
- Centre for Molecular Therapeutics, Australian Institute of Tropical Health and Medicine, James Cook University, Building E4, McGregor Rd, Smithfield, Cairns, QLD 4878, Australia;
- Correspondence:
| | - Gerry Turpin
- Tropical Herbarium of Australia, James Cook University, Building E1, McGregor Rd, Smithfield, Cairns, QLD 4878, Australia;
| | - Tenzin Jamtsho
- Yangchenphug High School, Ministry of Education, Thimphu 11001, Bhutan;
| | - Phurpa Wangchuk
- Centre for Molecular Therapeutics, Australian Institute of Tropical Health and Medicine, James Cook University, Building E4, McGregor Rd, Smithfield, Cairns, QLD 4878, Australia;
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4
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He Q, Wu Z, Li L, Sun W, Wang G, Jiang R, Hu L, Shi L, He R, Wang Y, Ye W. Discovery of Neuritogenic
Securinega
Alkaloids from
Flueggea suffruticosa
by a Building Blocks‐Based Molecular Network Strategy. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103878] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Qi‐Fang He
- Center for Bioactive Natural Molecules and Innovative Drugs Research College of Pharmacy Jinan University Guangzhou 510632 China
| | - Zhen‐Long Wu
- Center for Bioactive Natural Molecules and Innovative Drugs Research College of Pharmacy Jinan University Guangzhou 510632 China
| | - Liuren Li
- Center for Bioactive Natural Molecules and Innovative Drugs Research College of Pharmacy Jinan University Guangzhou 510632 China
| | - Wan‐Yang Sun
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research Jinan University Guangzhou 510632 China
| | - Gui‐Yang Wang
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research Jinan University Guangzhou 510632 China
| | - Ren‐Wang Jiang
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research Jinan University Guangzhou 510632 China
| | - Li‐Jun Hu
- Center for Bioactive Natural Molecules and Innovative Drugs Research College of Pharmacy Jinan University Guangzhou 510632 China
| | - Lei Shi
- Center for Bioactive Natural Molecules and Innovative Drugs Research College of Pharmacy Jinan University Guangzhou 510632 China
| | - Rong‐Rong He
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research Jinan University Guangzhou 510632 China
| | - Ying Wang
- Center for Bioactive Natural Molecules and Innovative Drugs Research College of Pharmacy Jinan University Guangzhou 510632 China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research Jinan University Guangzhou 510632 China
| | - Wen‐Cai Ye
- Center for Bioactive Natural Molecules and Innovative Drugs Research College of Pharmacy Jinan University Guangzhou 510632 China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research Jinan University Guangzhou 510632 China
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5
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He QF, Wu ZL, Li L, Sun WY, Wang GY, Jiang RW, Hu LJ, Shi L, He RR, Wang Y, Ye WC. Discovery of Neuritogenic Securinega Alkaloids from Flueggea suffruticosa by a Building Blocks-Based Molecular Network Strategy. Angew Chem Int Ed Engl 2021; 60:19609-19613. [PMID: 34196083 DOI: 10.1002/anie.202103878] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 06/28/2021] [Indexed: 12/22/2022]
Abstract
A combined strategy of building blocks recognition and molecular network construction, termed the building blocks-based molecular network (BBMN), was first presented to facilitate the efficient discovery of novel natural products. By mapping the BBMN of the total alkaloid fraction of Flueggea suffruticosa, three Securinega alkaloids (SEAs) with unusual chemical architectures, suffranidines A-C (1-3), were discovered and isolated. Compound 1 characterizes an unprecedented 8/5/6/5/6/6/6/6-fused octacyclic scaffold with a unique cage-shaped 3-azatricyclo[6.4.0.03,11 ]dodecane core. Compounds 2 and 3 are highly modified SEA dimers that incorporate additional C6 motifs. A hypothetical biosynthetic pathway for 1-3 was proposed. In addition, 1 significantly induced neuronal differentiation and neurite extension by upregulating eukaryotic elongation factor 2 (eEF2)-mediated protein synthesis.
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Affiliation(s)
- Qi-Fang He
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou, 510632, China
| | - Zhen-Long Wu
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou, 510632, China
| | - Liuren Li
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou, 510632, China
| | - Wan-Yang Sun
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou, 510632, China
| | - Gui-Yang Wang
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou, 510632, China
| | - Ren-Wang Jiang
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou, 510632, China
| | - Li-Jun Hu
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou, 510632, China
| | - Lei Shi
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou, 510632, China
| | - Rong-Rong He
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou, 510632, China
| | - Ying Wang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou, 510632, China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou, 510632, China
| | - Wen-Cai Ye
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou, 510632, China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou, 510632, China
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6
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5-Bromoisoxazolidines: synthesis, reactivity and NMR study. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Kang G, Park S, Han S. The Chemistry of High‐Oxidation State Securinega Alkaloids. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001610] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Gyumin Kang
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro, Yuseong-gu Daejeon 34141, Republic of Korea E-mail: synthesis.kaist.ac.kr
| | - Sangbin Park
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro, Yuseong-gu Daejeon 34141, Republic of Korea E-mail: synthesis.kaist.ac.kr
| | - Sunkyu Han
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro, Yuseong-gu Daejeon 34141, Republic of Korea E-mail: synthesis.kaist.ac.kr
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8
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Thakur S, Das A, Das T. 1,3-Dipolar cycloaddition of nitrones: synthesis of multisubstituted, diverse range of heterocyclic compounds. NEW J CHEM 2021. [DOI: 10.1039/d1nj02023d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The 1,3-dipolar cycloaddition reaction of nitrone is one of the most important methods for the synthesis of different sizes of heterocycles which have enormous applications in natural products, biologically active molecules and pharmaceuticals.
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Affiliation(s)
- Seema Thakur
- Department of Chemistry
- NIT Jamshedpur
- Jamshedpur 831014
- India
| | - Arunima Das
- Department of Chemistry
- NIT Jamshedpur
- Jamshedpur 831014
- India
| | - Tapas Das
- Department of Chemistry
- NIT Jamshedpur
- Jamshedpur 831014
- India
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9
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Xie QJ, Zhang WY, Wu ZL, Xu MT, He QF, Huang XJ, Che CT, Wang Y, Ye WC. Alkaloid constituents from the fruits of Flueggea virosa. Chin J Nat Med 2020; 18:385-392. [PMID: 32451096 DOI: 10.1016/s1875-5364(20)30045-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Indexed: 10/24/2022]
Abstract
Three new indole alkaloids, flueindolines A-C (1-3), along with nine known alkaloids (4-12), were isolated from the fruits of Flueggea virosa (Roxb. ex Willd.) Voigt. Compounds 1 and 2 are two new fused tricyclic indole alkaloids possessing an unusual pyrido[1, 2-a]indole framework, and 3 presents a rare spiro (pyrrolizidinyl-oxindole) backbone. Their structures with absolute configurations were elucidated by means of comprehensive spectroscopic analysis, chemical calculation, as well as X-ray crystallography. Chiral resolution and absolute configuration determination of the known compounds 4, 10, and 11 were reported for the first time. The hypothetical biogenetical pathways of 1-3 were herein also proposed.
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Affiliation(s)
- Qiu-Jie Xie
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China; Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
| | - Wei-Yan Zhang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China; Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
| | - Zhen-Long Wu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China; Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
| | - Ming-Tao Xu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China; Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
| | - Qi-Fang He
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China; Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
| | - Xiao-Jun Huang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China; Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
| | - Chun-Tao Che
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago 60612, United States
| | - Ying Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China; Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China.
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China; Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China.
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10
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Breugst M, Reissig H. The Huisgen Reaction: Milestones of the 1,3-Dipolar Cycloaddition. Angew Chem Int Ed Engl 2020; 59:12293-12307. [PMID: 32255543 PMCID: PMC7383714 DOI: 10.1002/anie.202003115] [Citation(s) in RCA: 236] [Impact Index Per Article: 59.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Indexed: 12/21/2022]
Abstract
The concept of 1,3-dipolar cycloadditions was presented by Rolf Huisgen 60 years ago. Previously unknown reactive intermediates, for example azomethine ylides, were introduced to organic chemistry and the (3+2) cycloadditions of 1,3-dipoles to multiple-bond systems (Huisgen reaction) developed into one of the most versatile synthetic methods in heterocyclic chemistry. In this Review, we present the history of this research area, highlight important older reports, and describe the evolution and further development of the concept. The most important mechanistic and synthetic results are discussed. Quantum-mechanical calculations support the concerted mechanism always favored by R. Huisgen; however, in extreme cases intermediates may be involved. The impact of 1,3-dipolar cycloadditions on the click chemistry concept of K. B. Sharpless will also be discussed.
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Affiliation(s)
- Martin Breugst
- Department für ChemieUniversität zu KölnGreinstrasse 450939KölnGermany
| | - Hans‐Ulrich Reissig
- Institut für Chemie und BiochemieFreie Universität BerlinTakustrasse 314195BerlinGermany
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11
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Breugst M, Reißig H. Die Huisgen‐Reaktion: Meilensteine der 1,3‐dipolaren Cycloaddition. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003115] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Martin Breugst
- Department für Chemie Universität zu Köln Greinstraße 4 50939 Köln Deutschland
| | - Hans‐Ulrich Reißig
- Institut für Chemie und Biochemie Freie Universität Berlin Takustr. 3 14195 Berlin Deutschland
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12
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Wu ZL, Huang XJ, Hu LJ, Zhang WY, Xie QJ, Jiang RW, Wang Y, Ye WC. Absolute Configurations and Stereochemical Inversion Mechanism of Epimeric Securinega Alkaloids from Flueggea suffruticosa. Org Lett 2020; 22:3673-3678. [PMID: 32319780 DOI: 10.1021/acs.orglett.0c01167] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Three pairs of Securinega alkaloid epimers with a piperidin-2-yl moiety (1-6) were isolated from Flueggea suffruticosa, and their structures including absolute configurations were definitely characterized. An interconvertible C-2' epimerization process within each pair of epimers was observed. The following comprehensive experimental and theoretical investigations demonstrated an unusual stereochemical inversion mechanism of an N-substituted carbon stereogenic center, which was evidenced to be a protic solvent mediated process involving a tandem 1,4-elimination/1,4-addition as the key step.
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Affiliation(s)
- Zhen-Long Wu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Xiao-Jun Huang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Li-Jun Hu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Wei-Yan Zhang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Qiu-Jie Xie
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Ren-Wang Jiang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Ying Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
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13
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Huang D, Luo X, Yin Z, Xu J, Gu Q. Diterpenoids from the aerial parts of Flueggea acicularis and their activity against RANKL-induced osteoclastogenesis. Bioorg Chem 2020; 94:103453. [DOI: 10.1016/j.bioorg.2019.103453] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Revised: 11/13/2019] [Accepted: 11/16/2019] [Indexed: 12/22/2022]
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14
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Park KJ, Kim CS, Khan Z, Oh J, Kim SY, Choi SU, Lee KR. Securinega Alkaloids from the Twigs of Securinega suffruticosa and Their Biological Activities. JOURNAL OF NATURAL PRODUCTS 2019; 82:1345-1353. [PMID: 31082231 DOI: 10.1021/acs.jnatprod.9b00142] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Seven new Securinega alkaloids, securingines A-G (1-7), together with seven known analogues (8-14), were isolated from the twigs of Securinega suffruticosa. Their chemical structures were elucidated by a combined approach of spectroscopic analysis, chemical methods, ECD calculations, and DP4+ probability analysis. The full NMR assignments and the absolute configuration of compound 8 are also reported. In addition, all the isolated phytochemicals (1-14) were assessed for their cytotoxic, anti-inflammatory, and potential neuroprotective activities. Compound 4 showed cytotoxic activity (IC50 values of 1.5-6.8 μM) against four human cell lines (A549, SK-OV-3, SK-MEL-2, and HCT15). Compounds 3, 10, 12, and 13 showed potent inhibitory effects on nitric oxide production (IC50 values of 12.6, 12.1, 1.1, and 7.7 μM, respectively) in lipopolysaccharide-stimulated murine microglia BV-2 cells. Compound 5 exhibited a nerve growth factor production effect (172.6 ± 1.2%) in C6 glioma cells at 20 μg/mL.
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Affiliation(s)
- Kyoung Jin Park
- Natural Products Laboratory, School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Chung Sub Kim
- Natural Products Laboratory, School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Zahra Khan
- Gachon Institute of Pharmaceutical Science , Gachon University , Incheon 21936 , Republic of Korea
- College of Pharmacy , Gachon University , #191, Hambakmoero , Yeonsu-gu, Incheon 21936 , Republic of Korea
| | - Joonseok Oh
- Department of Chemistry , Yale University , New Haven , Connecticut 06520 , United States
- Chemical Biology Institute , Yale University , West Haven , Connecticut 06516 , United States
| | - Sun Yeou Kim
- Gachon Institute of Pharmaceutical Science , Gachon University , Incheon 21936 , Republic of Korea
- College of Pharmacy , Gachon University , #191, Hambakmoero , Yeonsu-gu, Incheon 21936 , Republic of Korea
| | - Sang Un Choi
- Korea Research Institute of Chemical Technology , Daejeon 34114 , Republic of Korea
| | - Kang Ro Lee
- Natural Products Laboratory, School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
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15
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Zhao E, Zhou F, Zhao Y. Lewis Acids Promoted 3 + 2 Cycloaddition of Oxaziridines and Cyclic Allylic Alcohols through Carbonyl Imine Intermediates. J Org Chem 2019; 84:4282-4293. [PMID: 30869515 DOI: 10.1021/acs.joc.9b00246] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Syntheses of isoxazolidines through the carbonyl imine intermediates are currently limited to monosubstituted olefin substrates. Herein, we reported syntheses of novel bicyclic isoxazolidine-containing compounds through 1,3-dipolar cycloaddition reactions using cyclic allylic alcohols as substrates, which proved challenging in previous reports. Generally, the reaction yields range from good to high, and the reaction substrates tolerate various functional groups, including the cyclopropyl and amine groups. Mechanistic studies suggest that an allylic cation and a carbonyl imine intermediate are involved and responsible for the observed stereochemistry and diastereoselectivity.
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Affiliation(s)
- Erbao Zhao
- Nano Science and Technology Institute , University of Science and Technology of China , Suzhou , Jiangsu 215123 , China.,State Key Laboratory of Drug Research , Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zuchongzhi Road , Shanghai 201203 , China
| | - Feilong Zhou
- State Key Laboratory of Drug Research , Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zuchongzhi Road , Shanghai 201203 , China
| | - Yujun Zhao
- State Key Laboratory of Drug Research , Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zuchongzhi Road , Shanghai 201203 , China.,School of Pharmacy , Yancheng Teachers University , Yancheng , Jiangsu 224007 , China
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16
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Mandal R, Singh M, Krishnan AAV, Dahat YH, Bharitkar YP, Ravichandiran V, Hazra A. Semi-synthesis of a novel hybrid isoxazolidino withaferin via chemoselective and diastereoselective 1,3-dipolar nitrone cycloaddition reaction. Nat Prod Res 2019; 34:2208-2218. [PMID: 30938170 DOI: 10.1080/14786419.2019.1582045] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A facile, atom-economic synthesis of isoxazilidino withaferin, a novel hybrid of withaferin A, has been accomplished via two-step reaction of nitrone synthesis followed by nitrone 1,3-dipolar cycloaddition. The reaction is highly chemoselective (preferential reaction only on one of the two double bonds present on withaferin A) and diastereoselective affording exclusively the cis-fused products. The structure was determined by detailed analysis of 1D, 2D NMR and mass spectral data.
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Affiliation(s)
- Ramkrishna Mandal
- National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, India
| | - Meenakshi Singh
- National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, India
| | - Amrutha A V Krishnan
- National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, India
| | - Yogita H Dahat
- National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, India
| | - Yogesh P Bharitkar
- National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, India
| | - V Ravichandiran
- National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, India
| | - Abhijit Hazra
- National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, India
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17
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Wang XF, Liu FF, Zhu Z, Fang QQ, Qu SJ, Zhu W, Yang L, Zuo JP, Tan CH. Flueggenoids A – E, new dinorditerpenoids from Flueggea virosa. Fitoterapia 2019; 133:96-101. [DOI: 10.1016/j.fitote.2018.12.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 12/22/2018] [Accepted: 12/29/2018] [Indexed: 11/17/2022]
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18
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Wu ZL, Huang XJ, Xu MT, Ma X, Li L, Shi L, Wang WJ, Jiang RW, Ye WC, Wang Y. Flueggeacosines A-C, Dimeric Securinine-Type Alkaloid Analogues with Neuronal Differentiation Activity from Flueggea suffruticosa. Org Lett 2018; 20:7703-7707. [PMID: 30484660 DOI: 10.1021/acs.orglett.8b03432] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Flueggeacosines A-C (1-3), three dimeric securinine-type alkaloid analogues with unprecedented skeletons, were isolated from Flueggea suffruticosa. Compounds 1 and 2 are the first examples of C-3-C-15' connected dimeric securinine-type alkaloids. Compound 3 is an unprecedented heterodimer of securinine-type and benzoquinolizidine alkaloids. Biosynthetic pathways for 1-3 were proposed on the basis of the coexisting alkaloid monomers as the precursors. Compound 2 exhibited significant activity in promoting neuronal differentiation of Neuro-2a cells.
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Affiliation(s)
- Zhen-Long Wu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Xiao-Jun Huang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Ming-Tao Xu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Xuanyue Ma
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Liuren Li
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Lei Shi
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Wen-Jing Wang
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Ren-Wang Jiang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Ying Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
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19
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Hughes JM, Gleason JL. A bio-inspired cascade and a late-stage directed sp3 C H lithiation enables a concise total synthesis of (−)-virosaine A. Tetrahedron 2018. [DOI: 10.1016/j.tet.2017.12.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Luo XK, Cai J, Yin ZY, Luo P, Li CJ, Ma H, Seeram NP, Gu Q, Xu J. Fluvirosaones A and B, Two Indolizidine Alkaloids with a Pentacyclic Skeleton from Flueggea virosa. Org Lett 2018; 20:991-994. [DOI: 10.1021/acs.orglett.7b03935] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiang-Kun Luo
- Research
Center for Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People’s Republic of China
| | - Jie Cai
- Research
Center for Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People’s Republic of China
| | - Zhi-Yong Yin
- Research
Center for Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People’s Republic of China
| | - Pan Luo
- Research
Center for Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People’s Republic of China
| | - Chan-Juan Li
- Research
Center for Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People’s Republic of China
| | - Hang Ma
- Bioactive
Botanical Research Laboratory, Department of Biomedical and Pharmaceutical
Sciences, College of Pharmacy, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Navindra P. Seeram
- Bioactive
Botanical Research Laboratory, Department of Biomedical and Pharmaceutical
Sciences, College of Pharmacy, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Qiong Gu
- Research
Center for Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People’s Republic of China
| | - Jun Xu
- Research
Center for Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People’s Republic of China
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21
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Ellis BD, Vanderwal CD. Virosain A nach Hughes und Gleason - die Kunst der Synthese. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bryan D. Ellis
- Department of Chemistry; University of California; Irvine CA 92697-2025 USA
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22
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Ellis BD, Vanderwal CD. Hughes and Gleason's Virosaine A-Appreciating the Art in Synthesis. Angew Chem Int Ed Engl 2017; 56:13940-13942. [DOI: 10.1002/anie.201708051] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 09/09/2017] [Indexed: 01/05/2023]
Affiliation(s)
- Bryan D. Ellis
- Department of Chemistry; University of California; Irvine CA 92697-2025 USA
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23
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Komlaga G, Genta-Jouve G, Cojean S, Dickson RA, Mensah ML, Loiseau PM, Champy P, Beniddir MA. Antiplasmodial Securinega alkaloids from Phyllanthus fraternus: Discovery of natural (+)-allonorsecurinine. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.08.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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24
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Hughes JME, Gleason JL. A Concise Enantioselective Total Synthesis of (−)-Virosaine A. Angew Chem Int Ed Engl 2017; 56:10830-10834. [DOI: 10.1002/anie.201706273] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Jonathan M. E. Hughes
- Department of Chemistry; McGill University; 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
| | - James L. Gleason
- Department of Chemistry; McGill University; 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
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25
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Hughes JME, Gleason JL. A Concise Enantioselective Total Synthesis of (−)-Virosaine A. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706273] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jonathan M. E. Hughes
- Department of Chemistry; McGill University; 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
| | - James L. Gleason
- Department of Chemistry; McGill University; 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
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26
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Wehlauch R, Gademann K. Securinega
Alkaloids: Complex Structures, Potent Bioactivities, and Efficient Total Syntheses. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700142] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Robin Wehlauch
- Department of Chemistry; University of Zurich; Winterthurerstrasse 190 8057 Zurich Switzerland
| | - Karl Gademann
- Department of Chemistry; University of Zurich; Winterthurerstrasse 190 8057 Zurich Switzerland
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27
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Li Y, Li J, Ding H, Li A. Recent advances on the total synthesis of alkaloids in mainland China. Natl Sci Rev 2017. [DOI: 10.1093/nsr/nwx050] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
AbstractAlkaloids are a large family of natural products that mostly contain basic nitrogen atoms. Because of their intriguing structures and important functions, they have long been popular targets for synthetic organic chemists. China's chemists have made significant progress in the area of alkaloid synthesis over past decades. In this article, selected total syntheses of alkaloids from research groups in mainland China during the period 2011–16 are highlighted.
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Affiliation(s)
- Yong Li
- 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, Shanghai 200032, China
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China
| | - Jian Li
- 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, Shanghai 200032, China
| | - Hanfeng Ding
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Ang Li
- 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, Shanghai 200032, China
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28
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Zhang YB, Zhang XL, Chen NH, Wu ZN, Ye WC, Li YL, Wang GC. Four Matrine-Based Alkaloids with Antiviral Activities against HBV from the Seeds of Sophora alopecuroides. Org Lett 2017; 19:424-427. [DOI: 10.1021/acs.orglett.6b03685] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yu-Bo Zhang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People’s Republic of China
- Guangdong
Province Key Laboratory of Pharmacodynamic Constituents of TCM and
New Drugs Research, Jinan University, Guangzhou 510632, People’s Republic of China
| | - Xiao-Li Zhang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People’s Republic of China
- Guangdong
Province Key Laboratory of Pharmacodynamic Constituents of TCM and
New Drugs Research, Jinan University, Guangzhou 510632, People’s Republic of China
| | - Neng-Hua Chen
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People’s Republic of China
- Guangdong
Province Key Laboratory of Pharmacodynamic Constituents of TCM and
New Drugs Research, Jinan University, Guangzhou 510632, People’s Republic of China
| | - Zhong-Nan Wu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People’s Republic of China
- Guangdong
Province Key Laboratory of Pharmacodynamic Constituents of TCM and
New Drugs Research, Jinan University, Guangzhou 510632, People’s Republic of China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People’s Republic of China
- Guangdong
Province Key Laboratory of Pharmacodynamic Constituents of TCM and
New Drugs Research, Jinan University, Guangzhou 510632, People’s Republic of China
| | - Yao-Lan Li
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People’s Republic of China
- Guangdong
Province Key Laboratory of Pharmacodynamic Constituents of TCM and
New Drugs Research, Jinan University, Guangzhou 510632, People’s Republic of China
| | - Guo-Cai Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, People’s Republic of China
- Guangdong
Province Key Laboratory of Pharmacodynamic Constituents of TCM and
New Drugs Research, Jinan University, Guangzhou 510632, People’s Republic of China
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29
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Berthet M, Cheviet T, Dujardin G, Parrot I, Martinez J. Isoxazolidine: A Privileged Scaffold for Organic and Medicinal Chemistry. Chem Rev 2016; 116:15235-15283. [PMID: 27981833 DOI: 10.1021/acs.chemrev.6b00543] [Citation(s) in RCA: 169] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The isoxazolidine ring represents one of the privileged structures in medicinal chemistry, and there have been an increasing number of studies on isoxazolidine and isoxazolidine-containing compounds. Optimization of the 1,3-dipolar cycloaddition (1,3-DC), original methods including electrophilic or palladium-mediated cyclization of unsaturated hydroxylamine, has been developed to obtain isoxazolidines. Novel reactions involving the isoxazolidine ring have been highlighted to accomplish total synthesis or to obtain bioactive compounds, one of the most significant examples being probably the thermic ring contraction applied to the total synthesis of (±)-Gelsemoxonine. The unique isoxazolidine scaffold also exhibits an impressive potential as a mimic of nucleosides, carbohydrates, PNA, amino acids, and steroid analogs. This review aims to be a comprehensive and general summary of the different isoxazolidine syntheses, their use as starting building blocks for the preparation of natural compounds, and their main biological activities.
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Affiliation(s)
- Mathéo Berthet
- Institut des Biomolécules Max Mousseron , IBMM UMR-5247 CNRS, Université de Montpellier, ENSCM, CC17-03, Pl. E. Bataillon, 34095 Montpellier Cedex 5, France
| | - Thomas Cheviet
- Institut des Biomolécules Max Mousseron , IBMM UMR-5247 CNRS, Université de Montpellier, ENSCM, CC17-03, Pl. E. Bataillon, 34095 Montpellier Cedex 5, France
| | - Gilles Dujardin
- Institut des Molécules et Matériaux du Mans , IMMM UMR 6283 CNRS, Université du Maine, UFR Sciences et Techniques, Avenue Olivier Messiaen, 72085 Le Mans, France
| | - Isabelle Parrot
- Institut des Biomolécules Max Mousseron , IBMM UMR-5247 CNRS, Université de Montpellier, ENSCM, CC17-03, Pl. E. Bataillon, 34095 Montpellier Cedex 5, France
| | - Jean Martinez
- Institut des Biomolécules Max Mousseron , IBMM UMR-5247 CNRS, Université de Montpellier, ENSCM, CC17-03, Pl. E. Bataillon, 34095 Montpellier Cedex 5, France
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30
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Han JC, Li CC. Ruthenium-Catalyzed Metathesis Cascade Reactions in Natural Products Synthesis. CHEM REC 2016; 17:499-517. [PMID: 27775863 DOI: 10.1002/tcr.201600110] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 09/12/2016] [Indexed: 12/20/2022]
Abstract
In this account, we provide a brief summary of recent developments in ruthenium-catalyzed metathesis cascade reactions towards the total synthesis of natural products. We also highlight recent progress from our own laboratory regarding the synthesis of securinega alkaloids and humulanolides, which has resulted in the development of novel ruthenium-catalyzed metathesis cascade reactions. Inspired and guided by the pioneering and elegant research conducted in this area, we developed a regio-controlled relay dienyne metathesis cascade reaction and a cyclobutene-promoted RCM/ROM/RCM cascade reaction for the synthesis of securinega alkaloids and humulanolides, respectively.
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Affiliation(s)
- Jing-Chun Han
- Department of Chemistry, South University of Science and Technology of China, Shenzhen, 518055, China
| | - Chuang-Chuang Li
- Department of Chemistry, South University of Science and Technology of China, Shenzhen, 518055, China
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31
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Wang GY, Wang AT, Zhao BX, Lei XP, Zhang DM, Jiang RW, Wang Y, Ye WC. Norsecurinamines A and B, two norsecurinine-derived alkaloid dimers from the fruits of Flueggea virosa. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.06.113] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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32
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Zhang H, Zhu KK, Han YS, Luo C, Wainberg MA, Yue JM. Flueggether A and Virosinine A, Anti-HIV Alkaloids from Flueggea virosa. Org Lett 2015; 17:6274-7. [PMID: 26632657 DOI: 10.1021/acs.orglett.5b03320] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two new alkaloids, flueggether A (1) and virosinine A (2), were isolated from a Chinese medicinal plant, Flueggea virosa. Their structures were assigned via spectroscopic methods with the absolute configurations of 1 and 2 being established by X-ray diffraction analysis and calculated electronic circular dichroism data, respectively. Compound 1 represents the first example with an ether bridge of Securinega alkaloid oligomers, and 2 bears a new heterocyclic backbone. Both alkaloids showed mild in vitro anti-HIV activity.
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Affiliation(s)
- Hua Zhang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, P. R. China
| | - Kong-Kai Zhu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, P. R. China
| | - Ying-Shan Han
- McGill University Aids Centre , The Lady Davis Institute for Medical Research, Jewish General Hospital, 3755 Cote Ste-Catherine Road, Montreal, Quebec H3T 1E2, Canada
| | - Cheng Luo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, P. R. China
| | - Mark A Wainberg
- McGill University Aids Centre , The Lady Davis Institute for Medical Research, Jewish General Hospital, 3755 Cote Ste-Catherine Road, Montreal, Quebec H3T 1E2, Canada
| | - Jian-Min Yue
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, P. R. China
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33
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Fan L, Huang XJ, Fan CL, Li GQ, Wu ZL, Li SG, He ZD, Wang Y, Ye WC. Two New Oxindole Alkaloid Glycosides from the Leaves of Nauclea officinalis. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501001218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Two new oxindole alkaloid glycosides, nauclealomide A and (3 S,7 R)-javaniside, were isolated from the leaves of Nauclea officinalis. Their structures and absolute configurations were elucidated by means of NMR, HRESIMS, X-ray diffraction, acid hydrolysis and quantum chemical CD calculation. Nauclealomide A is a novel monoterpenoid oxindole alkaloid possessing a rare tetrahydro-2 H–1,3-oxazine ring.
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Affiliation(s)
- Long Fan
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research, Jinan University, Guangzhou 510632, P. R. China
- Department of Pharmacy, School of Medicine, Shenzhen University, Shenzhen 518060, P. R. China
| | - Xiao-Jun Huang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research, Jinan University, Guangzhou 510632, P. R. China
| | - Chun-Lin Fan
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Guo-Qiang Li
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Zhen-Long Wu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research, Jinan University, Guangzhou 510632, P. R. China
| | - Shuo-Guo Li
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research, Jinan University, Guangzhou 510632, P. R. China
| | - Zhen-Dan He
- Department of Pharmacy, School of Medicine, Shenzhen University, Shenzhen 518060, P. R. China
| | - Ying Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research, Jinan University, Guangzhou 510632, P. R. China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research, Jinan University, Guangzhou 510632, P. R. China
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Zhang H, Han YS, Wainberg MA, Yue JM. Anti-HIV Securinega alkaloid oligomers from Flueggea virosa. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.10.064] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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35
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Chirkin E, Atkatlian W, Porée FH. The Securinega Alkaloids. THE ALKALOIDS: CHEMISTRY AND BIOLOGY 2015; 74:1-120. [DOI: 10.1016/bs.alkal.2014.11.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Hu YQ, Li C, Zhao BX, Li JY, Huang XJ, Lin J, Wang Y, Ye WC, Chen WM. Regioselective and stereoselective photodimerization of securinine-type and norsecurinine-type alkaloids. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.05.061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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38
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Efficient Total Synthesis of Bioactive Natural Products: A Personal Record. CHEM REC 2014; 14:606-22. [DOI: 10.1002/tcr.201402015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Indexed: 11/07/2022]
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Zhou L, Zhao BX, Jiang RW, Huang XJ, Wu ZL, Wang Y, Ye WC. Securinega alkaloids from the fruits of Flueggea suffruticosa. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2014; 16:593-601. [PMID: 24957326 DOI: 10.1080/10286020.2014.930443] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 05/29/2014] [Indexed: 06/03/2023]
Abstract
Phytochemical investigation on the fruits of Flueggea suffruticosa resulted in the isolation of three new Securinega alkaloids, secu'amamine H (1), 15β-methoxy-14,15-dihydrosecurinine (3), and securinol E (7), as well as eight known ones (2, 4-6, and 8-11). Their structures were elucidated by means of spectroscopic techniques (1D and 2D NMR, MS, UV, and IR). The absolute configurations of the new compounds were established by single-crystal X-ray diffraction and CD analyses.
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Affiliation(s)
- Li Zhou
- a Department of Natural Medicinal Chemistry , China Pharmaceutical University , Nanjing 210009 , China
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40
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Wu ZL, Zhao BX, Huang XJ, Tang GY, Shi L, Jiang RW, Liu X, Wang Y, Ye WC. Suffrutines A and B: A Pair ofZ/EIsomeric Indolizidine Alkaloids from the Roots ofFlueggea suffruticosa. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201400048] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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41
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Wu ZL, Zhao BX, Huang XJ, Tang GY, Shi L, Jiang RW, Liu X, Wang Y, Ye WC. Suffrutines A and B: a pair of Z/E isomeric indolizidine alkaloids from the roots of Flueggea suffruticosa. Angew Chem Int Ed Engl 2014; 53:5796-9. [PMID: 24729281 DOI: 10.1002/anie.201400048] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Indexed: 11/11/2022]
Abstract
Suffrutines A (1) and B (2), a pair of novel photochemical Z/E isomeric indolizidine alkaloids, with a unique and highly conjugated C20 skeleton, were isolated from the roots of Flueggea suffruticosa. The structures were elucidated by extensive analysis of NMR spectra and single-crystal X-ray diffraction. The light-induced isomerization and hypothetical biogenetic pathway to 1 and 2, as well as their activity for regulating the morphology of Neuro-2a cells are also discussed.
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Affiliation(s)
- Zhen-Long Wu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, 510632 Guangzhou (China); JNU-HKUST Joint Laboratory for Neuroscience & Innovation Drug Research, Jinan University, 510632 Guangzhou (China)
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42
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Li P, Yin ZQ, Li SL, Huang XJ, Ye WC, Zhang QW. SIMULTANEOUS DETERMINATION OF EIGHT FLAVONOIDS AND POGOSTONE IN POGOSTEMON CABLIN BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2013.809545] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Ping Li
- a State Key Laboratory of Quality Research in Chinese Medicine , Institute of Chinese Medical Sciences, University of Macau , Macau
| | - Zhi-Qi Yin
- b Department of Natural Medicinal Chemistry , China Pharmaceutical University , Nanjing , China
| | - Song-Lin Li
- a State Key Laboratory of Quality Research in Chinese Medicine , Institute of Chinese Medical Sciences, University of Macau , Macau
- c Department of Pharmaceutical Analysis and Metabolomics , Jiangsu Province Academy of Traditional Chinese Medicine , Nanjing , China
| | - Xiao-Jun Huang
- a State Key Laboratory of Quality Research in Chinese Medicine , Institute of Chinese Medical Sciences, University of Macau , Macau
- d Institute of Traditional Chinese Medicine and Natural Products, Jinan University , Guangzhou , China
| | - Wen-Cai Ye
- d Institute of Traditional Chinese Medicine and Natural Products, Jinan University , Guangzhou , China
| | - Qing-Wen Zhang
- a State Key Laboratory of Quality Research in Chinese Medicine , Institute of Chinese Medical Sciences, University of Macau , Macau
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43
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Chao CH, Cheng JC, Shen DY, Wu TS. Anti-hepatitis C virus dinorditerpenes from the roots of Flueggea virosa. JOURNAL OF NATURAL PRODUCTS 2014; 77:22-28. [PMID: 24400834 DOI: 10.1021/np400528h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Along with four known terpenoids (1-4), eight new dinorditerpenes (5-12) were isolated and identified from the roots of Flueggea virosa. The absolute configurations of 4-6 were determined by the Mosher's method, and that of 5 was confirmed by single-crystal X-ray diffraction analysis. Using the hepatitis C virus cell culture infection system, compounds 1, 3, 11, and 12 exhibited significant anti-HCV activity with EC50 values of 5.6, 5.0, 7.5, and 6.6 μM, respectively. Compounds 11 and 12 were nontoxic toward the tested Huh7.5 cell lines.
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Affiliation(s)
- Chih-Hua Chao
- School of Pharmacy, China Medical University , Taichung 40402, Taiwan
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44
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Chao CH, Cheng JC, Hwang TL, Shen DY, Wu TS. Trinorditerpenes from the roots of Flueggea virosa. Bioorg Med Chem Lett 2013; 24:447-9. [PMID: 24388689 DOI: 10.1016/j.bmcl.2013.12.051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 12/11/2013] [Accepted: 12/13/2013] [Indexed: 11/19/2022]
Abstract
Two trinorditerpenes, flueggrenes A and B (1 and 2), have been isolated from the roots of Flueggea virosa. Their structures were established by extensive analyses of spectroscopic data. The isolates were evaluated for anti-HCV activity, as well as the inhibition of superoxide anion generation and elastase release in response to FMLP/cytochalasin B.
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Affiliation(s)
- Chih-Hua Chao
- School of Pharmacy, China Medical University, Taichung 404, Taiwan; Chinese Medicine Research and Development Center, China Medical University Hospital, Taichung 404, Taiwan.
| | - Ju-Chien Cheng
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung 404, Taiwan
| | - Tsong-Long Hwang
- Graduate Institute of Natural Products, Chang Gung University, Taoyuan 333, Taiwan
| | - De-Yang Shen
- Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan
| | - Tian-Shung Wu
- Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan.
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45
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Li XL, Zhao BX, Huang XJ, Zhang DM, Jiang RW, Li YJ, Jian YQ, Wang Y, Li YL, Ye WC. (+)- and (-)-Cajanusine, a pair of new enantiomeric stilbene dimers with a new skeleton from the leaves of Cajanus cajan. Org Lett 2013; 16:224-7. [PMID: 24295169 DOI: 10.1021/ol403211a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A pair of new enantiomeric stilbene dimers, (+)- and (-)-cajanusine [(+)-1 and (-)-1], with a unique coupling pattern were isolated from the leaves of Cajanus cajan . Their structures including absolute configurations were elucidated on the basis of comprehensive spectroscopic and single-crystal X-ray diffraction analyses, as well as CD calculations. The plausible biogenetic pathway of 1 was also proposed. Additionally, (±)-1, (+)-1, and (-)-1 exhibited inhibitory activities on the growth of human hepatocellular carcinoma cells.
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Affiliation(s)
- Xiao-Long Li
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University , Guangzhou 510632, People's Republic of China
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46
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Painter PP, Pemberton RP, Wong BM, Ho KC, Tantillo DJ. The Viability of Nitrone–Alkene (3 + 2) Cycloadditions in Alkaloid Biosynthesis. J Org Chem 2013; 79:432-5. [DOI: 10.1021/jo402487d] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Phillip P. Painter
- Department of Chemistry, University of California, Davis, 1 Shields Avenue, Davis, California 95616, United States
| | - Ryan P. Pemberton
- Department of Chemistry, University of California, Davis, 1 Shields Avenue, Davis, California 95616, United States
| | - Bonnie M. Wong
- Department of Chemistry, University of California, Davis, 1 Shields Avenue, Davis, California 95616, United States
| | - Krystina C. Ho
- Department of Chemistry, University of California, Davis, 1 Shields Avenue, Davis, California 95616, United States
| | - Dean J. Tantillo
- Department of Chemistry, University of California, Davis, 1 Shields Avenue, Davis, California 95616, United States
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47
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Krenske EH, Patel A, Houk KN. Does Nature Click? Theoretical Prediction of an Enzyme-Catalyzed Transannular 1,3-Dipolar Cycloaddition in the Biosynthesis of Lycojaponicumins A and B. J Am Chem Soc 2013; 135:17638-42. [DOI: 10.1021/ja409928z] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elizabeth H. Krenske
- School
of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Ashay Patel
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - K. N. Houk
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
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48
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Huo JP, Deng GH, Wu W, Xiong JF, Zhong ML, Wang ZY. Electrophoretic Deposition Polymerization of Diacetylenes with Tunable Structure. Macromol Rapid Commun 2013; 34:1779-84. [DOI: 10.1002/marc.201300637] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 09/21/2013] [Indexed: 01/08/2023]
Affiliation(s)
- Jing Pei Huo
- School of Chemistry and Environment; South China Normal University, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education; Guangzhou 510006 P. R. China
- School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Guo Hua Deng
- School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Wei Wu
- School of Chemistry and Environment; South China Normal University, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education; Guangzhou 510006 P. R. China
| | - Jin Feng Xiong
- School of Chemistry and Environment; South China Normal University, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education; Guangzhou 510006 P. R. China
| | - Ming Li Zhong
- School of Chemistry and Environment; South China Normal University, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education; Guangzhou 510006 P. R. China
| | - Zhao Yang Wang
- School of Chemistry and Environment; South China Normal University, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education; Guangzhou 510006 P. R. China
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49
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Zhao BX, Wang Y, Li C, Wang GC, Huang XJ, Fan CL, Li QM, Zhu HJ, Chen WM, Ye WC. Flueggedine, a novel axisymmetric indolizidine alkaloid dimer from Flueggea virosa. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.06.097] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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50
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Zhang H, Wei W, Yue JM. From monomer to tetramer and beyond: the intriguing chemistry of Securinega alkaloids from Flueggea virosa. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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