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Gao ZX, Wang H, Su AH, Li QY, Liang Z, Zhang YQ, Liu XY, Zhu MZ, Zhang HX, Hou YT, Li X, Sun LR, Li J, Xu ZJ, Lou HX. Asymmetric Synthesis and Biological Evaluation of Platensilin, Platensimycin, Platencin, and Their Analogs via a Bioinspired Skeletal Reconstruction Approach. J Am Chem Soc 2024; 146:18967-18978. [PMID: 38973592 DOI: 10.1021/jacs.4c02256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/09/2024]
Abstract
Platensilin, platensimycin, and platencin are potent inhibitors of β-ketoacyl-acyl carrier protein synthase (FabF) in the bacterial and mammalian fatty acid synthesis system, presenting promising drug leads for both antibacterial and antidiabetic therapies. Herein, a bioinspired skeleton reconstruction approach is reported, which enables the unified synthesis of these three natural FabF inhibitors and their skeletally diverse analogs, all stemming from a common ent-pimarane core. The synthesis features a diastereoselective biocatalytic reduction and an intermolecular Diels-Alder reaction to prepare the common ent-pimarane core. From this intermediate, stereoselective Mn-catalyzed hydrogen atom-transfer hydrogenation and subsequent Cu-catalyzed carbenoid C-H insertion afford platensilin. Furthermore, the intramolecular Diels-Alder reaction succeeded by regioselective ring opening of the newly formed cyclopropane enables the construction of the bicyclo[3.2.1]-octane and bicyclo[2.2.2]-octane ring systems of platensimycin and platencin, respectively. This skeletal reconstruction approach of the ent-pimarane core facilitates the preparation of analogs bearing different polycyclic scaffolds. Among these analogs, the previously unexplored cyclopropyl analog 47 exhibits improved antibacterial activity (MIC80 = 0.0625 μg/mL) against S. aureus compared to platensimycin.
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Affiliation(s)
- Zong-Xu Gao
- Department of Natural Products Chemistry, Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, No. 44, Wenhuaxi Rd, Jinan 250012, P. R. China
| | - Hongliang Wang
- School of Pharmaceutical Sciences & Institute of Materia Medica, State Key Laboratory of Advanced Drug Delivery System, Shandong First Medical University & Shandong Academy of Medical Sciences, No. 6699, Qingdao Rd, Jinan 250117, P. R. China
| | - Ai-Hong Su
- Department of Natural Products Chemistry, Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, No. 44, Wenhuaxi Rd, Jinan 250012, P. R. China
| | - Qian-Ying Li
- Department of Natural Products Chemistry, Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, No. 44, Wenhuaxi Rd, Jinan 250012, P. R. China
| | - Zhen Liang
- Department of Natural Products Chemistry, Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, No. 44, Wenhuaxi Rd, Jinan 250012, P. R. China
| | - Yue-Qing Zhang
- Department of Natural Products Chemistry, Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, No. 44, Wenhuaxi Rd, Jinan 250012, P. R. China
| | - Xu-Yuan Liu
- Department of Natural Products Chemistry, Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, No. 44, Wenhuaxi Rd, Jinan 250012, P. R. China
| | - Ming-Zhu Zhu
- Department of Natural Products Chemistry, Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, No. 44, Wenhuaxi Rd, Jinan 250012, P. R. China
| | - Hai-Xia Zhang
- Department of Natural Products Chemistry, Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, No. 44, Wenhuaxi Rd, Jinan 250012, P. R. China
| | - Yue-Tong Hou
- Department of Natural Products Chemistry, Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, No. 44, Wenhuaxi Rd, Jinan 250012, P. R. China
| | - Xin Li
- School of Pharmaceutical Sciences & Institute of Materia Medica, State Key Laboratory of Advanced Drug Delivery System, Shandong First Medical University & Shandong Academy of Medical Sciences, No. 6699, Qingdao Rd, Jinan 250117, P. R. China
| | - Long-Ru Sun
- Department of Natural Products Chemistry, Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, No. 44, Wenhuaxi Rd, Jinan 250012, P. R. China
| | - Jian Li
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, No. 429, Zhangheng Rd, Shanghai 200213, P. R. China
| | - Ze-Jun Xu
- Department of Natural Products Chemistry, Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, No. 44, Wenhuaxi Rd, Jinan 250012, P. R. China
| | - Hong-Xiang Lou
- Department of Natural Products Chemistry, Key Laboratory of Chemical Biology, School of Pharmaceutical Sciences, Shandong University, No. 44, Wenhuaxi Rd, Jinan 250012, P. R. China
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2
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Lin B, Liu T, Luo T. Gold-catalyzed cyclization and cycloaddition in natural product synthesis. Nat Prod Rep 2024; 41:1091-1112. [PMID: 38456472 DOI: 10.1039/d3np00056g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
Covering: 2016 to mid 2023Transition metal catalysis, known for its remarkable capacity to expedite the assembly of molecular complexity from readily available starting materials in a single operation, occupies a central position in contemporary chemical synthesis. Within this landscape, gold-catalyzed reactions present a novel and versatile paradigm, offering robust frameworks for accessing diverse structural motifs. In this review, we highlighted a curated selection of publications in the past 8 years, focusing on the deployment of homogeneous gold catalysis in the ring-forming step for the total synthesis of natural products. These investigations are categorized based on the specific ring formations they engender, accentuating the prevailing gold-catalyzed methodologies applied to surmount intricate challenges in natural products synthesis.
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Affiliation(s)
- Boxu Lin
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry of Education, Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
| | - Tianran Liu
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry of Education, Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
| | - Tuoping Luo
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry of Education, Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
- Institute of Molecular Physiology, Shenzhen Bay Laboratory, Shenzhen, Guangdong 518055, China
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Yamamoto T, Asakura M, Yamanomoto K, Shibata T, Endo K. Creation of a Chiral All-Carbon Quaternary Center Induced by CF 3 and CH 3 Substituents via Cu-Catalyzed Asymmetric Conjugate Addition. Org Lett 2024; 26:5312-5317. [PMID: 38869935 PMCID: PMC11217942 DOI: 10.1021/acs.orglett.4c01691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 06/05/2024] [Accepted: 06/10/2024] [Indexed: 06/14/2024]
Abstract
Cu-catalyzed asymmetric construction of a chiral quaternary center bearing CH3 and CF3 groups was achieved with high to excellent enantioselectivity using our originally developed ligands. The asymmetric conjugate addition of Me3Al to β-CF3-substituted enones and unsaturated ketoesters proceeded efficiently. The use of unsaturated ketoesters gives optically active furanones in high yields with high enantioselectivities. The perfluoroalkyl-substituted enone does not seem to be favorable in the present reaction.
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Affiliation(s)
- Taiyo Yamamoto
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, Shinjuku, Tokyo 162-8601, Japan
| | - Masayuki Asakura
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, Shinjuku, Tokyo 162-8601, Japan
| | - Ken Yamanomoto
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, Shinjuku, Tokyo 162-8601, Japan
| | - Takanori Shibata
- Department
of Chemistry and Biochemistry, Graduate School of Science and Technology, Waseda University, Shinjuku, Tokyo 169-8555, Japan
| | - Kohei Endo
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, Shinjuku, Tokyo 162-8601, Japan
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4
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Du J, Fu S, Liu B. A Photoinduced Radical Cascade Cyclization for the Synthesis of Angularly Fused Tricyclic Compounds. Org Lett 2024. [PMID: 38805032 DOI: 10.1021/acs.orglett.4c01497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
A photoinduced electron transfer (PET)-triggered cascade reaction has been devised for the conversion of second-generation enol silyl ethers into angularly fused tricyclic scaffolds. Utilizing readily available and cost-effective DCA and phenanthrene as the catalytic systems, this cascade transformation is achieved with high efficiency. The reaction demonstrates a good substrate scope and excellent stereoselectivity, thereby enriching the realm of PET-induced cascade reactions. Additionally, the radical adducts generated through this process can serve as valuable subunits for the synthesis of complex molecules.
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Affiliation(s)
- Jiaxin Du
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Shaomin Fu
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Bo Liu
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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5
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Xu H, Dickschat JS. Isotopic labelings for mechanistic studies. Methods Enzymol 2024; 699:163-186. [PMID: 38942502 DOI: 10.1016/bs.mie.2024.01.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/30/2024]
Abstract
The intricate mechanisms in the biosynthesis of terpenes belong to the most challenging problems in natural product chemistry. Methods to address these problems include the structure-based site-directed mutagenesis of terpene synthases, computational approaches, and isotopic labeling experiments. The latter approach has a long tradition in biosynthesis studies and has recently experienced a revival, after genome sequencing enabled rapid access to biosynthetic genes and enzymes. Today, this allows for a combined approach in which isotopically labeled substrates can be incubated with recombinant terpene synthases. These clearly defined reaction setups can give detailed mechanistic insights into the reactions catalyzed by terpene synthases, and recent developments have substantially deepened our understanding of terpene biosynthesis. This chapter will discuss the state of the art and introduce some of the most important methods that make use of isotopic labelings in mechanistic studies on terpene synthases.
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Affiliation(s)
- Houchao Xu
- Kekulé-Institute for Organic Chemistry and Biochemistry, Rheinische Friedrich-Wilhelms-University of Bonn, Bonn, Germany
| | - Jeroen S Dickschat
- Kekulé-Institute for Organic Chemistry and Biochemistry, Rheinische Friedrich-Wilhelms-University of Bonn, Bonn, Germany.
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6
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Zhuang QB, Tian JR, Lu K, Zhang XM, Zhang FM, Tu YQ, Fan R, Li ZH, Zhang YD. Catalytic Asymmetric Polycyclization of Tertiary Enamides with Silyl Enol Ethers: Total Synthesis of (-)-Cephalocyclidin A. J Am Chem Soc 2023. [PMID: 38019148 DOI: 10.1021/jacs.3c11178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
A catalytic enantioselective polycyclization of tertiary enamides with terminal silyl enol ethers has been developed by virtue of Cu(OTf)2 catalysis with a novel spiropyrroline-derived oxazole (SPDO) ligand. This tandem reaction offers an effective approach to assemble bicyclic and tricyclic N-heterocycles bearing both aza- and oxa-quaternary stereogenic centers, which are primal subunits in a range of natural alkaloids. Strategic application of this methodology and a late-stage radical cyclization as key steps have been showcased in the concise total synthesis of (-)-cephalocyclidin A.
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Affiliation(s)
- Qing-Bo Zhuang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Jin-Rui Tian
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Ka Lu
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Xiao-Ming Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yong-Qiang Tu
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
- School of Chemistry and Chemical Engineering, Frontier Scientific Center of Transformative Molecules, Shanghai Key Laboratory of Chiral Drugs and Engineering, Shanghai Jiao Tong University, Shanghai Minhang 200240, China
| | - Rong Fan
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Zhi-Hao Li
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yu-Dong Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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7
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Xu Z, Li X, Rose JA, Herzon SB. Finding activity through rigidity: syntheses of natural products containing tricyclic bridgehead carbon centers. Nat Prod Rep 2023; 40:1393-1431. [PMID: 37140079 PMCID: PMC10472132 DOI: 10.1039/d3np00008g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Covering: up to 2022Tricyclic bridgehead carbon centers (TBCCs) are a synthetically challenging substructure found in many complex natural products. Here we review the syntheses of ten representative families of TBCC-containing isolates, with the goal of outlining the strategies and tactics used to install these centers, including a discussion of the evolution of the successful synthetic design. We provide a summary of common strategies to inform future synthetic endeavors.
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Affiliation(s)
- Zhi Xu
- Department of Chemistry, Yale University, New Haven, Connecticut, 06520, USA.
| | - Xin Li
- Department of Chemistry, Yale University, New Haven, Connecticut, 06520, USA.
| | - John A Rose
- Department of Chemistry, Yale University, New Haven, Connecticut, 06520, USA.
| | - Seth B Herzon
- Department of Chemistry, Yale University, New Haven, Connecticut, 06520, USA.
- Departments of Pharmacology and Therapeutic Radiology, Yale School of Medicine, New Haven, Connecticut, 06520, USA
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8
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Wang Y, Su Y, Jia Y. Total Synthesis of (+)-Aberrarone. J Am Chem Soc 2023; 145:9459-9463. [PMID: 37084250 DOI: 10.1021/jacs.3c02511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023]
Abstract
The structurally intriguing diterpene (+)-aberrarone has been assembled in only 12 steps from the commercially available (S,S)-carveol without protecting group manipulations. This concise synthesis features a Cu-catalyzed asymmetric hydroboration to generate the chiral methyl group, a Ni-catalyzed reductive coupling to link two fragments, and a Mn-mediated radical cascade cyclization to construct the triquinane system.
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Affiliation(s)
- Yang Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Yongjian Su
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
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9
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Shi L, Gao Z, Li Y, Dai Y, Liu Y, Shi L, Hao HD. Synthetic study toward the diterpenoid aberrarone. Beilstein J Org Chem 2022; 18:1625-1628. [DOI: 10.3762/bjoc.18.173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 11/16/2022] [Indexed: 12/05/2022] Open
Abstract
An approach to aberrarone, an antimalarial diterpenoid natural product with tetracyclic skeleton is reported. Key to the stereoselective preparation of the 6-5-5 tricyclic skeleton includes the mediation of Nagata reagent for constructing the C1 all-carbon quaternary centers and gold-catalyzed cyclopentenone synthesis through C–H insertion.
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10
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Wang X, Liu F, Xu T. Catalytic diastereoselective construction of multiple contiguous quaternary carbon stereocenters via [2 + 2] cycloaddition and mechanistic insight. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.06.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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11
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Wang YP, Fang K, Tu YQ, Yin JJ, Zhao Q, Ke T. An efficient approach to angular tricyclic molecular architecture via Nazarov-like cyclization and double ring-expansion cascade. Nat Commun 2022; 13:2335. [PMID: 35484150 PMCID: PMC9050659 DOI: 10.1038/s41467-022-29947-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 03/17/2022] [Indexed: 01/13/2023] Open
Abstract
A modular and efficient method for constructing angular tri-carbocyclic architectures containing quaternary carbon center(s) from 1,3-dicycloalkylidenyl ketones is established, which involves an unconventional synergistic cascade of a Nazarov cyclization and two ring expansions. It features high selectivity, mild conditions and convenient operation, wide scope and easy availability of substrate. Substitution with R1 and R2 at the 4πe-system with electron-donating group favors this reaction, while that with electron-withdrawing group or proton disfavors. The electron-donating group as R1 directs the initial ring expansion at its own site, while the p-π- or n-π- associated substituent as R2 favors selectively the later ring expansion near its location because of the beneficial maintenance of an original conjugated system. The stereoselectivity has proved to be governed by either the steric effect of R3 and R4 at the expanded rings, or the migration ability of the migrating atom. Density Functional Theory calculation suggests the initial Nazarov cyclization would be the rate-determining step. A racemic total synthesis of the natural (±)-waihoensene is realized in 18 steps by use of this methodology.
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Affiliation(s)
- Yun-Peng Wang
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Kun Fang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Yong-Qiang Tu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, China. .,State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
| | - Jun-Jie Yin
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, China.,A training graduate student from Harbin Institute of Technology, Shenzhen, 518055, China
| | - Qi Zhao
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Tian Ke
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, China
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12
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Abstract
Terpenoids constitute a broad class of natural compounds with tremendous variability in structure and bioactivity, which resulted in a strong interest of the chemical community to this class of natural products over the last 150 years. The presence of strained small rings renders the terpenoid targets interesting for chemical synthesis, due to limited number of available methods and stability issues. In this feature article, a number of recent examples of total syntheses of terpenoids with complex carbon frameworks featuring small rings are discussed. Specific emphasis is given to the new developments in strategical and tactical approaches to construction of such systems.
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Affiliation(s)
- Gleb A Chesnokov
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.
| | - Karl Gademann
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.
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13
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Liu B, Qi J, Wu Y, Li JH, Li Y, Duan XY. The N-heterocyclic carbene-catalyzed [3 + 2] annulation of isoindigos with enals: the enantioselective construction of three contiguous stereogenic centers. Org Chem Front 2022. [DOI: 10.1039/d1qo01507a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
An NHC-catalyzed enantioselective [3 + 2] annulation of enals and isoindigo is introduced as an efficient strategy for the construction of dimeric spirocyclic bisindoline alkaloid derivatives with moderate yields and good enantioselectivities.
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Affiliation(s)
- Binghao Liu
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Jing Qi
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People's Republic of China
| | - Yatong Wu
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Jia-Hui Li
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Yanting Li
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Xiao-Yong Duan
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People's Republic of China
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14
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Yang P, Zhang Y, Chen M, Zhao Q, Ren ZH, Guan ZH. Rhodium-Catalyzed Enantioselective and Desymmetrizative Pauson-Khand Reaction: Access to Tricyclo[6.2.1.0 4,11]undecenes. Org Lett 2021; 23:9241-9245. [PMID: 34767367 DOI: 10.1021/acs.orglett.1c03589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Rhodium-catalyzed asymmetric desymmetrization Pauson-Khand reaction of C4-alkynyl-tethered cyclohexadienones has been developed as a novel strategy for access to fused 6-5-5 tricycles bearing three consecutive stereogenic centers. An array of chiral tricyclo[6.2.1.04,11]undecenes have been synthesized in high yields and enantioselectivities in a single step under mild conditions. This strategy employs readily accessible internal-olefin-containing 1,6-enynes, providing a potentially powerful tool for constructing chiral polycyclic scaffolds of complex molecules containing cyclopentenones and cyclohexenones.
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Affiliation(s)
- Pengfei Yang
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University. Xi'an 710127, PR China
| | - Yaodu Zhang
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University. Xi'an 710127, PR China
| | - Ming Chen
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University. Xi'an 710127, PR China
| | - Qingyang Zhao
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, PR China
| | - Zhi-Hui Ren
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University. Xi'an 710127, PR China
| | - Zheng-Hui Guan
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University. Xi'an 710127, PR China
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15
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Zhou W, Voituriez A. Synthesis of Cyclopentenones with C4-Quaternary Stereocenters via Stereospecific [3,3]-Sigmatropic Rearrangement and Applications in Total Synthesis of Sesquiterpenoids. J Am Chem Soc 2021; 143:17348-17353. [PMID: 34661403 DOI: 10.1021/jacs.1c07966] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A cationic gold(I)-catalyzed asymmetric [3,3]-sigmatropic rearrangement of sulfonium leads after cyclization to cyclopentenones with a C4-quaternary stereocenter. Starting with simple vinyl sulfoxides and propargyl silane, numerous compounds were isolated with moderate to good yields and excellent enantiomeric excesses (26 examples). The application of this simple methodology allowed the efficient total synthesis of five natural sesquiterpenoids, including enokipodin A and B, hitoyopodin A, lagopodin A, and isocuparene-3,4-diol.
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Affiliation(s)
- Weiping Zhou
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Arnaud Voituriez
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
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16
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Abstract
Peyssonnoside A is a marine-derived sulfated diterpenoid glucoside with a unique 5/6/3/6 tetracyclic skeleton with a highly substituted cyclopropane ring deeply embedded into the structure. Herein, we report the first total synthesis of this natural product in a concise, efficient, scalable, and highly diastereoselective fashion. The aglucone peyssonnosol was synthesized in 21% overall yield after 15 steps, featuring a Simmons-Smith cyclopropanation and Mukaiyama hydration, fully controlled by the spatial structure of the substrates.
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Affiliation(s)
- Gleb A Chesnokov
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Karl Gademann
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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17
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Trost BM, Zhang G, Gholami H, Zell D. Total Synthesis of Kadcoccinic Acid A Trimethyl Ester. J Am Chem Soc 2021; 143:12286-12293. [PMID: 34324806 DOI: 10.1021/jacs.1c05521] [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
The first total synthesis of the trimethyl ester of kadcoccinic acid A is described. The central structural element of our synthesis is a cyclopentenone motif that allows the assembly of the natural product skeleton. A gold(I)-catalyzed cyclization of an enynyl acetate led to efficient construction of the cyclopentenone scaffold. In this step, optimization studies revealed that the stereochemistry of the enynyl acetate dictates regioisomeric cyclopentenone formation. The synthesis further highlights an efficient copper-mediated conjugate addition, merged with a gold(I)-catalyzed Conia-ene reaction to connect the two fragments, thereby forging the D-ring of the natural product. The synthetic strategy reported herein can provide a general platform to access the skeleton of other members of this family of natural products.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry, Stanford University, Stanford, California 94305-5580, United States
| | - Guoting Zhang
- Department of Chemistry, Stanford University, Stanford, California 94305-5580, United States
| | - Hadi Gholami
- Department of Chemistry, Stanford University, Stanford, California 94305-5580, United States
| | - Daniel Zell
- Department of Chemistry, Stanford University, Stanford, California 94305-5580, United States
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18
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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
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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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19
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Yang D, Wu X, Zheng XJ, Xie JH, Zhou QL. Dynamic Kinetic Resolution of γ-Substituted Cyclic β-Ketoesters via Asymmetric Hydrogenation: Constructing Chiral Cyclic β-Hydroxyesters with Three Contiguous Stereocenters. Org Lett 2021; 23:5153-5157. [PMID: 34152152 DOI: 10.1021/acs.orglett.1c01689] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
An efficient asymmetric hydrogenation of racemic γ-substituted cyclic β-ketoesters via dynamic kinetic resolution to provide chiral cyclic β-hydroxy esters with three contiguous stereocenters is reported. Using a chiral spiro iridium catalyst (R)-5 (Ir-SpiroSAP), a series of racemic γ-aryl/alkyl substituted cyclic β-ketoesters were hydrogenated to the corresponding chiral cyclic β-hydroxy esters in high yields (84-97%) with good to excellent enantioselectivities (69->99% ee) and cis,cis-selectivities (up to >99:1).
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Affiliation(s)
- Dan Yang
- State Key Laboratory and Institute of Elemento-organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiong Wu
- State Key Laboratory and Institute of Elemento-organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiao-Jie Zheng
- State Key Laboratory and Institute of Elemento-organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jian-Hua Xie
- State Key Laboratory and Institute of Elemento-organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Qi-Lin Zhou
- State Key Laboratory and Institute of Elemento-organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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20
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Xin Z, Wang H, He H, Zhao X, Gao S. Asymmetric Total Synthesis of Norzoanthamine. Angew Chem Int Ed Engl 2021; 60:12807-12812. [PMID: 33822444 DOI: 10.1002/anie.202102643] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 03/26/2021] [Indexed: 11/08/2022]
Abstract
We report herein the asymmetric total synthesis of norzoanthamine using radical reactions as key steps for rapid access to the congested carbocyclic core, which is the major synthetic challenge for most zoanthamine alkaloids. (1) The Ueno-Stork radical cyclization was applied to construct the adjacent quaternary centers at the C-9 and C-22 positions; (2) a Co-catalyzed HAT radical reaction was successfully applied to construct the quaternary center at C-12 via Csp3 -Csp2 bond formation; (3) a Mn-catalyzed HAT radical reaction was used to stereospecifically reduce the tetra-substituted olefin (C13=C18) and install the contiguous stereocenters in proximity to the quaternary center. A one-pot bio-inspired cyclization step was finally applied to forge the unstable bis-amino acetal skeleton. Our approach can precisely control the stereochemistry of seven vicinal stereocenters and effectively construct the highly congested heptacyclic skeleton.
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Affiliation(s)
- Zhengyuan Xin
- Shanghai Key Laboratory of Green Chemistry and Chemical, Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
| | - Hui Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical, Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
| | - Xiaoli Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical, Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical, Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China.,Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
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21
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Xin Z, Wang H, He H, Zhao X, Gao S. Asymmetric Total Synthesis of Norzoanthamine. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhengyuan Xin
- Shanghai Key Laboratory of Green Chemistry and Chemical, Processes School of Chemistry and Molecular Engineering East China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Hui Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical, Processes School of Chemistry and Molecular Engineering East China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development East China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Xiaoli Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical, Processes School of Chemistry and Molecular Engineering East China Normal University 3663 North Zhongshan Road Shanghai 200062 China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical, Processes School of Chemistry and Molecular Engineering East China Normal University 3663 North Zhongshan Road Shanghai 200062 China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development East China Normal University 3663 North Zhongshan Road Shanghai 200062 China
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22
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Recent advances in the total synthesis of natural products bearing the contiguous all-carbon quaternary stereocenters. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153029] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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23
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Rosenbaum L, Häfner M, Gaich T. Total Synthesis of the Diterpene Waihoensene. Angew Chem Int Ed Engl 2021; 60:2939-2942. [PMID: 33103334 PMCID: PMC7898921 DOI: 10.1002/anie.202011298] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Indexed: 12/01/2022]
Abstract
A racemic and scalable enantioselective total synthesis of (+)-waihoensene was accomplished. (+)-Waihoensene belongs to the diterpene natural product family, and it features an angular triquinane substructure motif. Its tetracyclic [6.5.5.5]backbone is all-cis-fused, containing six contiguous stereocenters, four of which are quaternary. These structural features were efficiently installed by means of a diastereoselective radical cyclization, followed by an intramolecular Pauson-Khand reaction, a diastereoselective α-alkylation, and a diastereoselective 1,4-addition reaction. Enantioselectivity was introduced at an early stage, by an asymmetric palladium catalyzed decarboxylative allylation reaction on gram scale.
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Affiliation(s)
| | - Maximilian Häfner
- Department of ChemistryUniversity of KonstanzUniversitätsstrasse 1078464KonstanzGermany
| | - Tanja Gaich
- Department of ChemistryUniversity of KonstanzUniversitätsstrasse 1078464KonstanzGermany
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24
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Rosenbaum L, Häfner M, Gaich T. Total Synthesis of the Diterpene Waihoensene. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202011298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Maximilian Häfner
- Department of Chemistry University of Konstanz Universitätsstrasse 10 78464 Konstanz Germany
| | - Tanja Gaich
- Department of Chemistry University of Konstanz Universitätsstrasse 10 78464 Konstanz Germany
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25
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Abstract
Cyclohexane-angularly-fused triquinanes, 6-5-5-5 tetracycles, have attracted the attention of synthetic chemists due to their highly congested core structures and multiple quaternary carbon centers. This review focuses on the six completed total synthesis of naturally occurring cyclohexane-angularly-fused triquinanes in addition to seven notable methodologies that have been developed for the synthesis of these structures.
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Affiliation(s)
- Hongjun Jeon
- Department of Chemistry, University of Pennsylvania, 231 S. 34 Street, Philadelphia, PA 19104-6323, USA
- Therapeutics and Biotechnology Division, Korea Research Institute of Chemical Technology, Daejeon, 34114, Korea
| | - Jeffrey D Winkler
- Department of Chemistry, University of Pennsylvania, 231 S. 34 Street, Philadelphia, PA 19104-6323, USA
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26
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Evolution of Pauson-Khand Reaction: Strategic Applications in Total Syntheses of Architecturally Complex Natural Products (2016–2020). Catalysts 2020. [DOI: 10.3390/catal10101199] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Metal-mediated cyclizations are important transformations in a natural product total synthesis. The Pauson-Khand reaction, particularly powerful for establishing cyclopentenone-containing structures, is distinguished as one of the most attractive annulation processes routinely employed in synthesis campaigns. This review covers Co, Rh, and Pd catalyzed Pauson-Khand reaction and summarizes its strategic applications in total syntheses of structurally complex natural products in the last five years. Additionally, the hetero-Pauson-Khand reaction in the synthesis of heterocycles will also be discussed. Focusing on the panorama of organic synthesis, this review highlights the strategically developed Pauson-Khand reaction in fulfilling total synthetic tasks and its synthetic attractiveness is aimed to be illustrated.
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27
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Chi HM, Cole CJF, Hu P, Taylor CA, Snyder SA. Total syntheses of spiroviolene and spirograterpene A: a structural reassignment with biosynthetic implications. Chem Sci 2020; 11:10939-10944. [PMID: 34094343 PMCID: PMC8162393 DOI: 10.1039/d0sc04686h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 09/26/2020] [Indexed: 01/01/2023] Open
Abstract
The recent natural product isolates spiroviolene and spirograterpene A are two relatively non-functionalized linear triquinane terpenes with a large number of structural homologies. Nevertheless, three significant areas of structural disparity exist based on their original assignments, one of which implies a key stereochemical divergence early in their respective biosyntheses. Herein, using two known bicyclic ketone intermediates, a core Pd-catalyzed Heck cyclization sequence, and several chemoselective transformations, we describe concise total syntheses of both natural product targets and propose that the structure of spiroviolene should be reassigned. As a result, these natural products possess greater homology than previously anticipated.
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Affiliation(s)
- Hyung Min Chi
- Department of Chemistry, University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Charles J F Cole
- Department of Chemistry, University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Pengfei Hu
- Department of Chemistry, University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Cooper A Taylor
- Department of Chemistry, University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
| | - Scott A Snyder
- Department of Chemistry, University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
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28
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Wang S, Si R, Zhuang Q, Guo X, Ke T, Zhang X, Zhang F, Tu Y. Collective Total Synthesis of Aspidofractinine Alkaloids through the Development of a Bischler–Napieralski/Semipinacol Rearrangement Reaction. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009238] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Shuang‐Hu Wang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry Lanzhou University Lanzhou 730000 P. R. China
| | - Rui‐Qi Si
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry Lanzhou University Lanzhou 730000 P. R. China
| | - Qing‐Bo Zhuang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry Lanzhou University Lanzhou 730000 P. R. China
| | - Xiang Guo
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry Lanzhou University Lanzhou 730000 P. R. China
| | - Tian Ke
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong University Shanghai 200240 P. R. China
| | - Xiao‐Ming Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry Lanzhou University Lanzhou 730000 P. R. China
| | - Fu‐Min Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry Lanzhou University Lanzhou 730000 P. R. China
| | - Yong‐Qiang Tu
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry Lanzhou University Lanzhou 730000 P. R. China
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong University Shanghai 200240 P. R. China
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29
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Wang S, Si R, Zhuang Q, Guo X, Ke T, Zhang X, Zhang F, Tu Y. Collective Total Synthesis of Aspidofractinine Alkaloids through the Development of a Bischler–Napieralski/Semipinacol Rearrangement Reaction. Angew Chem Int Ed Engl 2020; 59:21954-21958. [DOI: 10.1002/anie.202009238] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Indexed: 01/01/2023]
Affiliation(s)
- Shuang‐Hu Wang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry Lanzhou University Lanzhou 730000 P. R. China
| | - Rui‐Qi Si
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry Lanzhou University Lanzhou 730000 P. R. China
| | - Qing‐Bo Zhuang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry Lanzhou University Lanzhou 730000 P. R. China
| | - Xiang Guo
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry Lanzhou University Lanzhou 730000 P. R. China
| | - Tian Ke
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong University Shanghai 200240 P. R. China
| | - Xiao‐Ming Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry Lanzhou University Lanzhou 730000 P. R. China
| | - Fu‐Min Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry Lanzhou University Lanzhou 730000 P. R. China
| | - Yong‐Qiang Tu
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry Lanzhou University Lanzhou 730000 P. R. China
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong University Shanghai 200240 P. R. China
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30
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Hoveyda AH, Zhou Y, Shi Y, Brown MK, Wu H, Torker S. Sulfonate N-Heterocyclic Carbene-Copper Complexes: Uniquely Effective Catalysts for Enantioselective Synthesis of C-C, C-B, C-H, and C-Si Bonds. Angew Chem Int Ed Engl 2020; 59:21304-21359. [PMID: 32364640 DOI: 10.1002/anie.202003755] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Indexed: 12/21/2022]
Abstract
A copper-based complex that contains a sulfonate N-heterocyclic carbene ligand was first reported 15 years ago. Since then, these organometallic entities have proven to be uniquely effective in catalyzing an assortment of enantioselective transformations, including allylic substitutions, conjugate additions, proto-boryl additions to alkenes, boryl and silyl substitutions, hydride-allyl additions to alkenyl boronates, and additions of boron-containing allyl moieties to N-H ketimines. In this review article, we detail the shortcomings in the state-of-the-art that fueled the development of this air stable ligand class, members of which can be prepared on multigram scale. For each reaction type, when relevant, the prior art at the time of the advance involving sulfonate NHC-Cu catalysts and/or subsequent key developments are briefly analyzed, and the relevance of the advance to efficient and enantioselective total or formal synthesis of biologically active molecules is underscored. Mechanistic analysis of the structural attributes of sulfonate NHC-Cu catalysts that are responsible for their ability to facilitate transformations with high efficiency as well as regio- and enantioselectivity are detailed. This review contains several formerly undisclosed methodological advances and mechanistic analyses, the latter of which constitute a revision of previously reported proposals.
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Affiliation(s)
- Amir H Hoveyda
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA.,Supramolecular Science and Engineering Institute, University of Strasbourg, CNRS, 67000, Strasbourg, France
| | - Yuebiao Zhou
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Ying Shi
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - M Kevin Brown
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Hao Wu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Sebastian Torker
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA.,Supramolecular Science and Engineering Institute, University of Strasbourg, CNRS, 67000, Strasbourg, France
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31
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Eggert A, Etling C, Lübken D, Saxarra M, Kalesse M. Contiguous Quaternary Carbons: A Selection of Total Syntheses. Molecules 2020; 25:molecules25173841. [PMID: 32847075 PMCID: PMC7504199 DOI: 10.3390/molecules25173841] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/14/2020] [Accepted: 08/18/2020] [Indexed: 12/11/2022] Open
Abstract
Contiguous quaternary carbons in terpene natural products remain a major challenge in total synthesis. Synthetic strategies to overcome this challenge will be a pivotal prerequisite to the medicinal application of natural products and their analogs or derivatives. In this review, we cover syntheses of natural products that exhibit a dense assembly of quaternary carbons and whose syntheses were uncompleted until recently. While discussing their syntheses, we not only cover the most recent total syntheses but also provide an update on the status quo of modern syntheses of complex natural products. Herein, we review (±)-canataxpropellane, (+)-waihoensene, (–)-illisimonin A and (±)-11-O-debenzoyltashironin as prominent examples of natural products bearing contiguous quaternary carbons.
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Affiliation(s)
- Alina Eggert
- Institut für Organische Chemie, Gottfried Wilhelm Leibniz University Hannover und Biomolekulares Wirkstoffzentrum (BMWZ), Schneiderberg 1B, D-30167 Hannover, Germany; (A.E.); (C.E.); (D.L.); (M.S.)
| | - Christoph Etling
- Institut für Organische Chemie, Gottfried Wilhelm Leibniz University Hannover und Biomolekulares Wirkstoffzentrum (BMWZ), Schneiderberg 1B, D-30167 Hannover, Germany; (A.E.); (C.E.); (D.L.); (M.S.)
| | - Dennis Lübken
- Institut für Organische Chemie, Gottfried Wilhelm Leibniz University Hannover und Biomolekulares Wirkstoffzentrum (BMWZ), Schneiderberg 1B, D-30167 Hannover, Germany; (A.E.); (C.E.); (D.L.); (M.S.)
- Helmholtz Zentrum für Infektionsforschung(HZI), Inhoffenstraße 7, D-38124 Braunschweig, Germany
| | - Marius Saxarra
- Institut für Organische Chemie, Gottfried Wilhelm Leibniz University Hannover und Biomolekulares Wirkstoffzentrum (BMWZ), Schneiderberg 1B, D-30167 Hannover, Germany; (A.E.); (C.E.); (D.L.); (M.S.)
| | - Markus Kalesse
- Institut für Organische Chemie, Gottfried Wilhelm Leibniz University Hannover und Biomolekulares Wirkstoffzentrum (BMWZ), Schneiderberg 1B, D-30167 Hannover, Germany; (A.E.); (C.E.); (D.L.); (M.S.)
- Helmholtz Zentrum für Infektionsforschung(HZI), Inhoffenstraße 7, D-38124 Braunschweig, Germany
- Correspondence: ; Tel.: +49-(0)511-7624688
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32
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Wang Z. Construction of all-carbon quaternary stereocenters by catalytic asymmetric conjugate addition to cyclic enones in natural product synthesis. Org Chem Front 2020. [DOI: 10.1039/d0qo00763c] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review discusses the construction of all-carbon quaternary stereocenters using catalytic asymmetric conjugate addition and its application in natural product synthesis.
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Affiliation(s)
- Zhuo Wang
- Southern University of Science and Technology
- School of Medicine
- Shenzhen
- People's Republic of China
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