1
|
Zhang X, Wang D, Chang M, Xu X, Li W, Wang W. Pd(II)-Catalyzed tandem selective dehydrogenative [4+2] annulation of 2-methyl-1,3-cycloalkanediones with olefins. Chem Commun (Camb) 2024; 60:594-597. [PMID: 38099810 DOI: 10.1039/d3cc05191a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
A practical and effective palladium-catalyzed selective dehydrogenative [4+2] annulation of 2-methyl-1,3-cycloalkanediones with olefins was reported. The active 2-methylene-1,3-cycloalkanedione was in situ generated via Pd-catalyzed enolate oxidation processes, and it subsequently reacted with a wide variety of olefins to afford various polysubstituted dihydropyran derivatives in good to excellent yields.
Collapse
Affiliation(s)
- Xu Zhang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Di Wang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Mengfan Chang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Xuefeng Xu
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Wenguang Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Wanya Wang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| |
Collapse
|
2
|
Huck CJ, Boyko YD, Sarlah D. Dearomative logic in natural product total synthesis. Nat Prod Rep 2022; 39:2231-2291. [PMID: 36173020 PMCID: PMC9772301 DOI: 10.1039/d2np00042c] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Covering: 2011 to 2022The natural world is a prolific source of some of the most interesting, rare, and complex molecules known, harnessing sophisticated biosynthetic machinery evolved over billions of years for their production. Many of these natural products represent high-value targets of total synthesis, either for their desirable biological activities or for their beautiful structures outright; yet, the high sp3-character often present in nature's molecules imparts significant topological complexity that pushes the limits of contemporary synthetic technology. Dearomatization is a foundational strategy for generating such intricacy from simple materials that has undergone considerable maturation in recent years. This review highlights the recent achievements in the field of dearomative methodology, with a focus on natural product total synthesis and retrosynthetic analysis. Disconnection guidelines and a three-phase dearomative logic are described, and a spotlight is given to nature's use of dearomatization in the biosynthesis of various classes of natural products. Synthetic studies from 2011 to 2021 are reviewed, and 425 references are cited.
Collapse
Affiliation(s)
| | - Yaroslav D. Boyko
- Department of Chemistry, University of Illinois, Urbana, IL 61801, USA
| | - David Sarlah
- Department of Chemistry, University of Illinois, Urbana, IL 61801, USA,Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| |
Collapse
|
3
|
Munda M, Niyogi S, Shaw K, Kundu S, Nandi R, Bisai A. Electrocatalysis as a key strategy for the total synthesis of natural products. Org Biomol Chem 2022; 20:727-748. [PMID: 34989383 DOI: 10.1039/d1ob02115j] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Electrochemical strategies have been a powerful approach for the synthesis of valuable intermediates, in particular heterocyclic motifs. Because of the mild nature, a wide range of nonclassical bond disconnections have been achieved via in situ-generated radical intermediates in a highly efficient manner. In particular, anodic electrochemical oxidative strategies have been utilized for the total synthesis of many structurally intriguing natural products. In this review article, we have discussed a number of total syntheses of structurally intriguing alkaloids and terpenoids in which electrochemical processes play an important role as a key methodology.
Collapse
Affiliation(s)
- Mintu Munda
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal - 462 066, Madhya Pradesh, India
| | - Sovan Niyogi
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia-741246, West Bengal, India.
| | - Kundan Shaw
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal - 462 066, Madhya Pradesh, India
| | - Sourav Kundu
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal - 462 066, Madhya Pradesh, India
| | - Rhituparna Nandi
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal - 462 066, Madhya Pradesh, India
| | - Alakesh Bisai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal - 462 066, Madhya Pradesh, India.,Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia-741246, West Bengal, India.
| |
Collapse
|
4
|
Majhi S. Applications of ultrasound in total synthesis of bioactive natural products: A promising green tool. ULTRASONICS SONOCHEMISTRY 2021; 77:105665. [PMID: 34298310 PMCID: PMC8322467 DOI: 10.1016/j.ultsonch.2021.105665] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 07/03/2021] [Accepted: 07/05/2021] [Indexed: 05/04/2023]
Abstract
Total synthesisis frequently compared to climbing as it provides a suitable route to reach a high point from the floor, the complex natural product from simple and commercially available materials. The total synthesis has a privileged position of trust in confirming the hypothetical complex structures of natural products despite sophisticated analytical and spectroscopic instrumentation and techniques that are available presently. Moreover, total synthesis is also useful to prepare rare bioactive natural products in the laboratory as several bioactive secondary metabolites are obtained in small quantities from natural sources. The artistic aspect of the total synthesis of bioactive natural products continues to be praised today as it may provide environmental protection through the concept of green or clean chemistry. The use of ultrasound waves as a non-polluting source of energy is of great interest in the field of sustainable and pharmaceutical chemistry as it differs from conventional energy sources in terms of reaction rates, yields, selectivities, and purity of the products. The present review highlights the application of ultrasound as a green tool in the total synthesis of bioactive natural products as well as this article is also aimed to offer an overview of natural sources, structures, and biological activities of the promising natural products for the first time from 2005 to 2020 elegantly.
Collapse
Affiliation(s)
- Sasadhar Majhi
- Department of Chemistry (UG & PG), Triveni Devi Bhalotia College, Raniganj, West Bengal 713347, India.
| |
Collapse
|
5
|
Selenium-Containing Polysaccharides—Structural Diversity, Biosynthesis, Chemical Modifications and Biological Activity. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11083717] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Selenosugars are a group of sugar derivatives of great structural diversity (e.g., molar masses, selenium oxidation state, and selenium binding), obtained as a result of biosynthesis, chemical modification of natural compounds, or chemical synthesis. Seleno-monosaccharides and disaccharides are known to be non-toxic products of the natural metabolism of selenium compounds in mammals. In the case of the selenium-containing polysaccharides of natural origin, their formation is also postulated as a form of detoxification of excess selenium in microorganisms, mushroom, and plants. The valency of selenium in selenium-containing polysaccharides can be: 0 (encapsulated nano-selenium), IV (selenites of polysaccharides), or II (selenoglycosides or selenium built into the sugar ring to replace oxygen). The great interest in Se-polysaccharides results from the expected synergy between selenium and polysaccharides. Several plant- and mushroom-derived polysaccharides are potent macromolecules with antitumor, immunomodulatory, antioxidant, and other biological properties. Selenium, a trace element of fundamental importance to human health, has been shown to possess several analogous functions. The mechanism by which selenium exerts anticancer and immunomodulatory activity differs from that of polysaccharide fractions, but a similar pharmacological effect suggests a possible synergy of these two agents. Various functions of Se-polysaccharides have been explored, including antitumor, immune-enhancement, antioxidant, antidiabetic, anti-inflammatory, hepatoprotective, and neuroprotective activities. Due to being non-toxic or much less toxic than inorganic selenium compounds, Se-polysaccharides are potential dietary supplements that could be used, e.g., in chemoprevention.
Collapse
|
6
|
Peddinti RK, Dua N, Ghosh S. Zn(OTf)2-Catalyzed 1,6-Conjugate Addition of Benzoxazinones to p-Quinone Methides: Access to 3,3-Diaryl-2-(2-oxo-2H-1,4-benzoxazin-3-yl)propanoic Acid Esters. Synlett 2021. [DOI: 10.1055/s-0040-1706600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractAn effective method for the synthesis of 3,3-diaryl-2-(2-oxo-2H-1,4-benzoxazin-3-yl)propanoic acid esters is reported. A novel zinc triflate-catalyzed regioselective 1,6-conjugate addition of vinylogous carbamates to p-quinone methides for accessing the title compounds has been developed. This protocol furnished the hybrid compounds in good to excellent yields. The reaction is rapid and has a broad substrate scope.
Collapse
Affiliation(s)
| | - Neha Dua
- Department of Chemistry, Indian Institute of Technology Roorkee
| | - Sonali Ghosh
- Supramolecular and Structural Chemistry Laboratory, School of Basic Sciences, Indian Institute of Technology Bhubaneswar
| |
Collapse
|
7
|
Leyva-Padrón G, Vanegas-Espinoza PE, Evangelista-Lozano S, Del Villar-Martínez AA, Bazaldúa C. Chemical analysis of callus extracts from toxic and non-toxic varieties of Jatropha curcas L. PeerJ 2020; 8:e10172. [PMID: 33240600 PMCID: PMC7666564 DOI: 10.7717/peerj.10172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 09/22/2020] [Indexed: 02/02/2023] Open
Abstract
Jatropha curcas L. belongs to Euphorbiaceae family, and it synthesizes flavonoid and diterpene compounds that have showed antioxidant, anti-inflammatory, anticancer, antiviral, antimicrobial, antifungal and insecticide activity. Seeds of this plant accumulate phorbol esters, which are tigliane type diterpenes, reported as toxic and, depending on its concentration, toxic and non-toxic varieties has been identified. The aim of this work was to characterize the chemical profile of the extracts from seeds, leaves and callus of both varieties (toxic and non-toxic) of Jatropha curcas, to verify the presence of important compounds in dedifferentiated cells and consider the possibility of using these cultures for the massive production of metabolites. Callus induction was obtained using NAA (1.5 mg L−1) and BAP (1.5 mg L−1) after 21 d for both varieties. Thin layer chromatography analysis showed differences in compounds accumulation in callus from non-toxic variety throughout the time of culture, diterpenes showed an increase along the time, in contrast with flavonoids which decreased. Based on the results obtained through microQTOF-QII spectrometer it is suggested a higher accumulation of phorbol esters, derived from 12-deoxy-16-hydroxy-phorbol (m/z 365 [M+H]+), in callus of 38 d than those of 14 d culture, from both varieties. Unlike flavonoids accumulation, the MS chromatograms analysis allowed to suggest lower accumulation of flavonoids as the culture time progresses, in callus from both varieties. The presence of six glycosylated flavonoids is also suggested in leaf and callus extracts derived from both varieties (toxic and non-toxic), including: apigenin 6-C-α-L-arabinopyranosyl-8-C-β-D-xylopyranoside (m/z 535 [M+H]+), apigenin 4′-O-rhamnoside (m/z 417 [M+H]+), vitexin (m/z 433 [M+H]+), vitexin 4′-O-glucoside-2″-O-rhamnoside (m/z 741 [M+H]+), vicenin-2 (m/z 595 [M+H]+), and vicenin-2,6″-O-glucoside (m/z 757 [M+H]+).
Collapse
Affiliation(s)
- Gerardo Leyva-Padrón
- Centro de Desarrollo de Productos Bióticos, Instituto Politécnico Nacional, Yautepec, Morelos, México
| | | | - Silvia Evangelista-Lozano
- Centro de Desarrollo de Productos Bióticos, Instituto Politécnico Nacional, Yautepec, Morelos, México
| | | | - Crescencio Bazaldúa
- Centro de Desarrollo de Productos Bióticos, Instituto Politécnico Nacional, Yautepec, Morelos, México
| |
Collapse
|
8
|
Zheng L, Hua R. Recent Advances in Construction of Polycyclic Natural Product Scaffolds via One-Pot Reactions Involving Alkyne Annulation. Front Chem 2020; 8:580355. [PMID: 33195069 PMCID: PMC7596902 DOI: 10.3389/fchem.2020.580355] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 08/31/2020] [Indexed: 12/12/2022] Open
Abstract
Polycyclic scaffolds are omnipresent in natural products and drugs, and the synthetic strategies and methods toward construction of these scaffolds are of particular importance. Compared to simple cyclic ring systems, polycyclic scaffolds have higher structure complexity and diversity, making them suitable for charting broader chemical space, yet bringing challenges for the syntheses. In this review, we surveyed progress in the past decade on synthetic methods for polycyclic natural product scaffolds, in which the key steps are one-pot reactions involving intermolecular or intramolecular alkyne annulation. Synthetic strategies of selected polycyclic carbocycles and heterocycles with at least three fused, bridged, or spiro rings are discussed with emphasis on the synthetic efficiency and product diversity. Recent examples containing newly developed synthetic concepts or toolkits such as collective and divergent total synthesis, gold catalysis, C–H functionalization, and dearomative cyclization are highlighted. Finally, several “privileged synthetic strategies” for “privileged polycyclic scaffolds” are summarized, with discussion of remained challenges and future perspectives.
Collapse
Affiliation(s)
- Liyao Zheng
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, China
| | - Ruimao Hua
- Department of Chemistry, Tsinghua University, Beijing, China
| |
Collapse
|
9
|
Min L, Hu YJ, Fan JH, Zhang W, Li CC. Synthetic applications of type II intramolecular cycloadditions. Chem Soc Rev 2020; 49:7015-7043. [PMID: 32869796 DOI: 10.1039/d0cs00365d] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Type II intramolecular cycloadditions ([4+2], [4+3], [4+4] and [5+2]) have emerged recently as an efficient and powerful strategy for the construction of bridged ring systems. In general, type II cycloadditions provide access to a wide range of bridged bicyclo[m.n.1] ring systems with high regio- and diastereoselectivity in an easy and straightforward manner. In each section of this review, an overview of the corresponding type II cycloadditions is presented, which is followed by highlights of method development and synthetic applications in natural product synthesis. The goal of this review is to provide a survey of recent advances in the field covering literature up to 2020. The review will serve as a useful reference for organic chemists engaged in the total synthesis of natural products containing bridged bicyclo[m.n.1] ring systems and provide strong stimulus for invention and further advances in this exciting research field.
Collapse
Affiliation(s)
- Long Min
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China.
| | | | | | | | | |
Collapse
|
10
|
Shadrikova VА, Golovin EV, Rybakov VB, Klimochkin YN. Transformations of 1-[2-(Adamantan-1-Yl)-2-Hydroxyethyl]-1,2,3,6-Tetrahydropyridines by the Action of Trifluoromethanesulfonic Acid. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02747-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
11
|
Transformations of 1-phenethyl-1,2,3,6-tetrahydropyridines in the presence of trifluoromethanesulfonic acid. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02748-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
12
|
Affiliation(s)
- Jian-Quan Liu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China.,Department of Chemistry, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Andrey Shatskiy
- Department of Chemistry, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Markus D Kärkäs
- Department of Chemistry, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
| |
Collapse
|
13
|
Hu YJ, Li LX, Han JC, Min L, Li CC. Recent Advances in the Total Synthesis of Natural Products Containing Eight-Membered Carbocycles (2009-2019). Chem Rev 2020; 120:5910-5953. [PMID: 32343125 DOI: 10.1021/acs.chemrev.0c00045] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Natural products containing eight-membered carbocycles constitute a class of structurally intriguing and biologically important molecules such as the famous diterpenes taxol and vinigrol. Such natural products are being increasingly investigated because of their fascinating architectural features and potent medicinal properties. However, synthesis of natural products with cyclooctane moieties has proved to be highly challenging. This review highlights the recently completed total syntheses of natural products with eight-membered carbocycles with a focus on strategic considerations. A collection of 27 representative studies from the literature covering the decade from 2009 to 2019 is described in chronological order with relevant studies grouped together, including syntheses of the same natural product by different research groups using different strategies. Finally, a summary and outlook including a discussion of the major features of each strategy used in the syntheses are presented. This review illustrates the diversity and creativity in the elegant synthetic designs of eight-membered carbocycles. We hope this review will provide timely illumination and beneficial guidance for future synthetic efforts for organic chemists who are interested in this area.
Collapse
Affiliation(s)
- Ya-Jian Hu
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China
| | - Li-Xuan Li
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China
| | - Jing-Chun Han
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China
| | - Long Min
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China
| |
Collapse
|
14
|
Affiliation(s)
- Kai Rossen
- H. Lundbeck A/S Ottiliavej 9 , 2500 Valby , Denmark
| |
Collapse
|
15
|
Abstract
The bicyclo[3.3.1]nonane architecture is a privileged structural motif found in over 1000 natural products with relevance to neurodegenerative disease, bacterial and parasitic infection, and cancer among others. Despite disparate biosynthetic machinery, alkaloid, terpene, and polyketide-producing organisms have all evolved pathways to incorporate this carbocyclic ring system. Natural products of mixed polyketide/terpenoid origins (meroterpenes) are a particularly rich and important source of biologically active bicyclo[3.3.1]nonane-containing molecules. Herein we detail a fully synthetic strategy toward this broad family of targets based on an abiotic annulation/rearrangement strategy resulting in a 10-step total synthesis of garsubellin A, an enhancer of choline acetyltransferase and member of the large family of polycyclic polyprenylated acylphloroglucinols. This work solidifies a strategy for making multiple, diverse meroterpene chemotypes in a programmable assembly process involving a minimal number of chemical transformations.
Collapse
|
16
|
Hernandez LW, Sarlah D. Empowering Synthesis of Complex Natural Products. Chemistry 2019; 25:13248-13270. [DOI: 10.1002/chem.201901808] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 06/08/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Lucas W. Hernandez
- Department of Chemistry University of Illinois at Urbana-Champaign 600 South Mathews Avenue 270 RAL, Box 107-5 Urbana IL 61801 USA
| | - David Sarlah
- Department of Chemistry University of Illinois at Urbana-Champaign 600 South Mathews Avenue 270 RAL, Box 107-5 Urbana IL 61801 USA
| |
Collapse
|
17
|
Onomura O, Kuriyama M, Kamogawa S, Yamamoto K. β-Trichloroacetylation of Cyclic Amines: Application to Synthesis of Chiral Azabicyclo-N-oxyls. HETEROCYCLES 2019. [DOI: 10.3987/com-18-s(f)68] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
18
|
Condakes M, Rosen RZ, Harwood SJ, Maimone TJ. A copper-catalyzed double coupling enables a 3-step synthesis of the quassinoid core architecture. Chem Sci 2019. [DOI: 10.1039/c8sc03835j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
A cross coupling/SN2′ tandem reaction is described to construct the polycyclic core architecture of the quassinoids, a fascinating class of degraded triterpenes with potent anticancer activity.
Collapse
Affiliation(s)
| | - Rachel Z. Rosen
- Department of Chemistry
- University of California, Berkeley
- Berkeley
- USA
| | | | - Thomas J. Maimone
- Department of Chemistry
- University of California, Berkeley
- Berkeley
- USA
| |
Collapse
|
19
|
Luo J, Xie C, Zhang Y, Huang SH, Zhu L, Hong R. Total syntheses of melinonine-E and strychnoxanthine: Evolution of the synthetic strategy enabled by novel method development. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.08.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
20
|
Liu W, Qin W, Wang X, Xue F, Liu XY, Qin Y. Bioinspired Synthesis of (+)-Cinchonidine Using Cascade Reactions. Angew Chem Int Ed Engl 2018; 57:12299-12302. [PMID: 30084528 DOI: 10.1002/anie.201804848] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 07/09/2018] [Indexed: 11/06/2022]
Abstract
The development of efficient syntheses of complex natural products has long been a major challenge in synthetic chemistry. Designing cascade reactions and employing bioinspired transformations are an important and reliable means of achieving this goal. Presented here is a combination of these two strategies, which allow efficient asymmetric synthesis of the cinchona alkaloid (+)-cinchonidine. The key steps of this synthesis are a controllable, visible-light-induced photoredox radical cascade reaction to efficiently access the tetracyclic monoterpenoid indole alkaloid core, as well as a practical biomimetic cascade rearrangement for the indole to quinoline transformation. The use of stereoselective chemical transformations in this work makes it an efficient synthesis of (+)-cinchonidine.
Collapse
Affiliation(s)
- Wentao Liu
- School of Pharmaceutic Science, Chongqing University, Chongqing, 401331, P. R. China
| | - Wenfang Qin
- School of Pharmaceutic Science, Chongqing University, Chongqing, 401331, P. R. China
| | - Xiaobei Wang
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, and Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, P. R. China
| | - Fei Xue
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, and Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, P. R. China
| | - Xiao-Yu Liu
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, and Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, P. R. China
| | - Yong Qin
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, and Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, P. R. China
| |
Collapse
|
21
|
Liu W, Qin W, Wang X, Xue F, Liu XY, Qin Y. Bioinspired Synthesis of (+)-Cinchonidine Using Cascade Reactions. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804848] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wentao Liu
- School of Pharmaceutic Science; Chongqing University; Chongqing 401331 P. R. China
| | - Wenfang Qin
- School of Pharmaceutic Science; Chongqing University; Chongqing 401331 P. R. China
| | - Xiaobei Wang
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education; and Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology; West China School of Pharmacy; Sichuan University; Chengdu 610041 P. R. China
| | - Fei Xue
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education; and Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology; West China School of Pharmacy; Sichuan University; Chengdu 610041 P. R. China
| | - Xiao-Yu Liu
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education; and Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology; West China School of Pharmacy; Sichuan University; Chengdu 610041 P. R. China
| | - Yong Qin
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education; and Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology; West China School of Pharmacy; Sichuan University; Chengdu 610041 P. R. China
| |
Collapse
|
22
|
Kärkäs MD. Electrochemical strategies for C-H functionalization and C-N bond formation. Chem Soc Rev 2018; 47:5786-5865. [PMID: 29911724 DOI: 10.1039/c7cs00619e] [Citation(s) in RCA: 580] [Impact Index Per Article: 96.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Conventional methods for carrying out carbon-hydrogen functionalization and carbon-nitrogen bond formation are typically conducted at elevated temperatures, and rely on expensive catalysts as well as the use of stoichiometric, and perhaps toxic, oxidants. In this regard, electrochemical synthesis has recently been recognized as a sustainable and scalable strategy for the construction of challenging carbon-carbon and carbon-heteroatom bonds. Here, electrosynthesis has proven to be an environmentally benign, highly effective and versatile platform for achieving a wide range of nonclassical bond disconnections via generation of radical intermediates under mild reaction conditions. This review provides an overview on the use of anodic electrochemical methods for expediting the development of carbon-hydrogen functionalization and carbon-nitrogen bond formation strategies. Emphasis is placed on methodology development and mechanistic insight and aims to provide inspiration for future synthetic applications in the field of electrosynthesis.
Collapse
Affiliation(s)
- Markus D Kärkäs
- Department of Chemistry, Organic Chemistry, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
| |
Collapse
|
23
|
Kuriyama M, Nakashima S, Miyagi T, Sato K, Yamamoto K, Onomura O. Palladium-catalyzed chemoselective anaerobic oxidation of N-heterocycle-containing alcohols. Org Chem Front 2018. [DOI: 10.1039/c8qo00421h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A palladium-catalyzed chemoselective anaerobic oxidation for N-heterocycle-containing alcohols has been achieved with chloroarenes as oxidants.
Collapse
Affiliation(s)
- Masami Kuriyama
- Graduate School of Biomedical Sciences
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Sho Nakashima
- Graduate School of Biomedical Sciences
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Tsubasa Miyagi
- Graduate School of Biomedical Sciences
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Kanako Sato
- Graduate School of Biomedical Sciences
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Kosuke Yamamoto
- Graduate School of Biomedical Sciences
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Osamu Onomura
- Graduate School of Biomedical Sciences
- Nagasaki University
- Nagasaki 852-8521
- Japan
| |
Collapse
|
24
|
Brill ZG, Condakes ML, Ting CP, Maimone TJ. Navigating the Chiral Pool in the Total Synthesis of Complex Terpene Natural Products. Chem Rev 2017; 117:11753-11795. [PMID: 28293944 PMCID: PMC5638449 DOI: 10.1021/acs.chemrev.6b00834] [Citation(s) in RCA: 186] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The pool of abundant chiral terpene building blocks (i.e., "chiral pool terpenes") has long served as a starting point for the chemical synthesis of complex natural products, including many terpenes themselves. As inexpensive and versatile starting materials, such compounds continue to influence modern synthetic chemistry. This review highlights 21st century terpene total syntheses which themselves use small, terpene-derived materials as building blocks. An outlook to the future of research in this area is highlighted as well.
Collapse
Affiliation(s)
- Zachary G. Brill
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720
| | - Matthew L. Condakes
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720
| | - Chi P. Ting
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720
| | - Thomas J. Maimone
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720
| |
Collapse
|
25
|
Reddy TN, Ravinder M, Bikshapathi R, Sujitha P, Kumar CG, Rao VJ. Design, synthesis, and biological evaluation of 4-H pyran derivatives as antimicrobial and anticancer agents. Med Chem Res 2017. [DOI: 10.1007/s00044-017-1982-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
26
|
Golonka AN, Schindler CS. Iron(III) chloride-catalyzed synthesis of 3-carboxy-2,5-disubstituted furans from γ-alkynyl aryl- and alkylketones. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.04.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
27
|
Wang J, Tong R. A NMR method for relative stereochemical assignments of the tricyclic core of cephalosporolides, penisporolides and related synthetic analogues. Org Chem Front 2017. [DOI: 10.1039/c6qo00556j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A new NMR method is developed to discriminate the four possible diastereomeric SAFLs, leading to revisions of 11 synthetic compounds.
Collapse
Affiliation(s)
- Jian Wang
- Department of Chemistry
- Hong Kong University of Science and Technology
- Kowloon
- China
| | - Rongbiao Tong
- Department of Chemistry
- Hong Kong University of Science and Technology
- Kowloon
- China
- HKUST Shenzhen Research Institute
| |
Collapse
|
28
|
Abstract
Some recent examples of conceptually different bioinspired total syntheses of complex terpenoids are presented that highlight the numerous benefits of pursuing bioinspired strategies.
Collapse
Affiliation(s)
- Cedric L. Hugelshofer
- Department of Chemistry and Pharmacy
- Ludwig-Maximilians-University Munich
- 81377 Munich
- Germany
| | - Thomas Magauer
- Department of Chemistry and Pharmacy
- Ludwig-Maximilians-University Munich
- 81377 Munich
- Germany
| |
Collapse
|
29
|
Bebbington MWP. Natural product analogues: towards a blueprint for analogue-focused synthesis. Chem Soc Rev 2017; 46:5059-5109. [DOI: 10.1039/c6cs00842a] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A review of approaches to natural product analogues leads to the suggestion of new methods for the generation of biologically active natural product-like scaffolds.
Collapse
|
30
|
The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2015. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
31
|
Just-Baringo X, Clark J, Gutmann MJ, Procter DJ. Selective Synthesis of Cyclooctanoids by Radical Cyclization of Seven-Membered Lactones: Neutron Diffraction Study of the Stereoselective Deuteration of a Chiral Organosamarium Intermediate. Angew Chem Int Ed Engl 2016; 55:12499-502. [PMID: 27600354 PMCID: PMC5113801 DOI: 10.1002/anie.201606792] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Indexed: 11/09/2022]
Abstract
Seven-membered lactones undergo selective SmI2 -H2 O-promoted radical cyclization to form substituted cyclooctanols. The products arise from an exo-mode of cyclization rather than the usual endo-attack employed in the few radical syntheses of cyclooctanes. The process is terminated by the quenching of a chiral benzylic samarium. A labeling experiment and neutron diffraction study have been used for the first time to probe the configuration and highly diastereoselective deuteration of a chiral organosamarium intermediate.
Collapse
Affiliation(s)
| | - Jemma Clark
- School of Chemistry, University of Manchester, Manchester, M13 9PL, UK
| | - Matthias J Gutmann
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, UK
| | - David J Procter
- School of Chemistry, University of Manchester, Manchester, M13 9PL, UK.
| |
Collapse
|
32
|
Just-Baringo X, Clark J, Gutmann MJ, Procter DJ. Selective Synthesis of Cyclooctanoids by Radical Cyclization of Seven-Membered Lactones: Neutron Diffraction Study of the Stereoselective Deuteration of a Chiral Organosamarium Intermediate. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606792] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Jemma Clark
- School of Chemistry; University of Manchester; Manchester M13 9PL UK
| | - Matthias J. Gutmann
- ISIS Facility; Rutherford Appleton Laboratory; Chilton, Didcot Oxfordshire OX11 0QX UK
| | - David J. Procter
- School of Chemistry; University of Manchester; Manchester M13 9PL UK
| |
Collapse
|
33
|
Watson RB, Golonka AN, Schindler CS. Iron(III) Chloride Catalyzed Formation of 3,4-Dihydro-2H-pyrans from α-Alkylated 1,3-Dicarbonyls. Selective Synthesis of α- and β-Lapachone. Org Lett 2016; 18:1310-3. [DOI: 10.1021/acs.orglett.6b00254] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Rebecca B. Watson
- University of Michigan, Department of Chemistry, Willard Henry Dow Laboratory, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Alexander N. Golonka
- University of Michigan, Department of Chemistry, Willard Henry Dow Laboratory, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Corinna S. Schindler
- University of Michigan, Department of Chemistry, Willard Henry Dow Laboratory, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| |
Collapse
|
34
|
Abstract
The carbon–carbon (C–C) bond forms the ‘backbone’ of nearly every organic molecule, and lies at the heart of the chemical sciences! Let us explore designing of carbon–carbon frameworks at ambient conditions.
Collapse
Affiliation(s)
- Goutam Brahmachari
- Laboratory of Natural Products & Organic Synthesis
- Department of Chemistry
- Visva-Bharati (a Central University)
- Santiniketan-731235
- India
| |
Collapse
|
35
|
Brown DG, Boström J. Analysis of Past and Present Synthetic Methodologies on Medicinal Chemistry: Where Have All the New Reactions Gone? J Med Chem 2015; 59:4443-58. [DOI: 10.1021/acs.jmedchem.5b01409] [Citation(s) in RCA: 826] [Impact Index Per Article: 91.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Dean G. Brown
- AstraZeneca Neurosciences, IMED Biotech Unit, AstraZeneca R&D Boston, 141 Portland Street, Cambridge, Massachusetts 02139, United States
| | - Jonas Boström
- CVMD
Innovative Medicines, IMED Biotech Unit, AstraZeneca, Mölndal SE-431 83, Sweden
| |
Collapse
|
36
|
Brahmachari G. Design of Organic Transformations at Ambient Conditions: Our Sincere Efforts to the Cause of Green Chemistry Practice. CHEM REC 2015; 16:98-123. [DOI: 10.1002/tcr.201500229] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Goutam Brahmachari
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (Central University); Santiniketan 731 235 West Bengal India
| |
Collapse
|