1
|
Wu K, Kang K, Liu D, Zhang C, Wang X, Zhang M, Li Q. Gold-catalyzed endo-selective Ring-opening of Epoxides and its Application in Construction of Poly-ethers. Chemistry 2024; 30:e202400234. [PMID: 38273816 DOI: 10.1002/chem.202400234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 01/23/2024] [Indexed: 01/27/2024]
Abstract
Tetrahydropyran and tetrahydropyran-fused poly-ethers scaffolds are found in many classes of natural products and medicinally relevant small molecules. Here we describe a catalytic system for 6-endo selective ring-opening of epoxides by Au(I) or Au(III) catalyst that provides rapid access to various tetrahydropyran-derived motifs. It also could efficiently construct the subunits of marine ladder-like poly-ethers through emulating the Nakanishi's hypothesis on the biosynthesis of these toxins. The synthetic utility of this method is also demonstrated in the preparation of the tricyclic core of tetrahydropyran-containing macrolide natural products lituarines A-C.
Collapse
Affiliation(s)
- Kehuan Wu
- Small-Molecule Drug Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai, 201203, China
| | - Kaiwen Kang
- Small-Molecule Drug Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Dan Liu
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Chiyue Zhang
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Xinyu Wang
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Miaocheng Zhang
- Small-Molecule Drug Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qi Li
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, 210023, China
- Small-Molecule Drug Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| |
Collapse
|
2
|
Bowen JI, Wang L, Crump MP, Willis CL. Synthetic and biosynthetic methods for selective cyclisations of 4,5-epoxy alcohols to tetrahydropyrans. Org Biomol Chem 2022; 20:1150-1175. [PMID: 35029626 PMCID: PMC8827043 DOI: 10.1039/d1ob01905h] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Accepted: 12/21/2021] [Indexed: 12/20/2022]
Abstract
Tetrahydropyrans (THPs) are common structural motifs found in natural products and synthetic therapeutic molecules. In Nature these 6-membered oxygen heterocycles are often assembled via intramolecular reactions involving either oxy-Michael additions or ring opening of epoxy-alcohols. Indeed, the polyether natural products have been particularly widely studied due to their fascinating structures and important biological properties; these are commonly formed via endo-selective epoxide-opening cascades. In this review we outline synthetic approaches for endo-selective intramolecular epoxide ring opening (IERO) of 4,5-epoxy-alcohols and their applications in natural product synthesis. In addition, the biosynthesis of THP-containing natural products which utilise IERO reactions are reviewed.
Collapse
Affiliation(s)
- James I Bowen
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Luoyi Wang
- CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Matthew P Crump
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Christine L Willis
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| |
Collapse
|
3
|
Mori Y. The Power of Small Wins. J SYN ORG CHEM JPN 2021. [DOI: 10.5059/yukigoseikyokaishi.79.874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yuji Mori
- Faculty of Pharmacy, Meijo University
| |
Collapse
|
4
|
Loeffler CR, Tartaglione L, Friedemann M, Spielmeyer A, Kappenstein O, Bodi D. Ciguatera Mini Review: 21st Century Environmental Challenges and the Interdisciplinary Research Efforts Rising to Meet Them. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:3027. [PMID: 33804281 PMCID: PMC7999458 DOI: 10.3390/ijerph18063027] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/12/2021] [Accepted: 03/12/2021] [Indexed: 12/19/2022]
Abstract
Globally, the livelihoods of over a billion people are affected by changes to marine ecosystems, both structurally and systematically. Resources and ecosystem services, provided by the marine environment, contribute nutrition, income, and health benefits for communities. One threat to these securities is ciguatera poisoning; worldwide, the most commonly reported non-bacterial seafood-related illness. Ciguatera is caused by the consumption of (primarily) finfish contaminated with ciguatoxins, potent neurotoxins produced by benthic single-cell microalgae. When consumed, ciguatoxins are biotransformed and can bioaccumulate throughout the food-web via complex pathways. Ciguatera-derived food insecurity is particularly extreme for small island-nations, where fear of intoxication can lead to fishing restrictions by region, species, or size. Exacerbating these complexities are anthropogenic or natural changes occurring in global marine habitats, e.g., climate change, greenhouse-gas induced physical oceanic changes, overfishing, invasive species, and even the international seafood trade. Here we provide an overview of the challenges and opportunities of the 21st century regarding the many facets of ciguatera, including the complex nature of this illness, the biological/environmental factors affecting the causative organisms, their toxins, vectors, detection methods, human-health oriented responses, and ultimately an outlook towards the future. Ciguatera research efforts face many social and environmental challenges this century. However, several future-oriented goals are within reach, including digital solutions for seafood supply chains, identifying novel compounds and methods with the potential for advanced diagnostics, treatments, and prediction capabilities. The advances described herein provide confidence that the tools are now available to answer many of the remaining questions surrounding ciguatera and therefore protection measures can become more accurate and routine.
Collapse
Affiliation(s)
- Christopher R. Loeffler
- National Reference Laboratory of Marine Biotoxins, Department Safety in the Food Chain, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany; (A.S.); (O.K.); (D.B.)
- Department of Pharmacy, School of Medicine and Surgery, University of Napoli Federico II, Via D. Montesano 49, 80131 Napoli, Italy;
| | - Luciana Tartaglione
- Department of Pharmacy, School of Medicine and Surgery, University of Napoli Federico II, Via D. Montesano 49, 80131 Napoli, Italy;
- CoNISMa—National Inter-University Consortium for Marine Sciences, Piazzale Flaminio 9, 00196 Rome, Italy
| | - Miriam Friedemann
- Department Exposure, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany;
| | - Astrid Spielmeyer
- National Reference Laboratory of Marine Biotoxins, Department Safety in the Food Chain, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany; (A.S.); (O.K.); (D.B.)
| | - Oliver Kappenstein
- National Reference Laboratory of Marine Biotoxins, Department Safety in the Food Chain, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany; (A.S.); (O.K.); (D.B.)
| | - Dorina Bodi
- National Reference Laboratory of Marine Biotoxins, Department Safety in the Food Chain, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany; (A.S.); (O.K.); (D.B.)
| |
Collapse
|
5
|
Kelley EH, Jamison TF. Synthesis of the EFG Framework of Tamulamides A and B. Org Lett 2019; 21:8027-8030. [PMID: 31523969 PMCID: PMC6778004 DOI: 10.1021/acs.orglett.9b03015] [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: 11/29/2022]
Abstract
Synthesis of the fused polycyclic ether motif comprising the EFG rings of the marine ladder polyethers tamulamides A and B has been achieved via two different etherification strategies. Ultimately, a reductive etherification approach proved most successful due to tolerance of the G ring substitution and provided the EFG 6,7,6 ring system in 58% yield.
Collapse
Affiliation(s)
- Elizabeth H Kelley
- Department of Chemistry , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Timothy F Jamison
- Department of Chemistry , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| |
Collapse
|
6
|
Molgó J, Schlumberger S, Sasaki M, Fuwa H, Louzao MC, Botana LM, Servent D, Benoit E. Gambierol Potently Increases Evoked Quantal Transmitter Release and Reverses Pre- and Post-Synaptic Blockade at Vertebrate Neuromuscular Junctions. Neuroscience 2019; 439:106-116. [PMID: 31255710 DOI: 10.1016/j.neuroscience.2019.06.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Revised: 06/15/2019] [Accepted: 06/18/2019] [Indexed: 11/25/2022]
Abstract
Gambierol is a marine polycyclic ether toxin, first isolated from cultured Gambierdiscus toxicus dinoflagellates collected in French Polynesia. The chemical synthesis of gambierol permitted the analyses of its mode of action which includes the selective inhibition of voltage-gated K+ (KV) channels. In the present study we investigated the action of synthetic gambierol at vertebrate neuromuscular junctions using conventional techniques. Gambierol was studied on neuromuscular junctions in which muscle nicotinic ACh receptors have been blocked with d-tubocurarine (postsynaptic block), or in junctions in which quantal ACh release has been greatly reduced by a low Ca2+-high Mg2+ medium or by botulinum neurotoxin type-A (BoNT/A) (presynaptic block). Results show that nanomolar concentrations of gambierol inhibited the fast K+ current and prolonged the duration of the presynaptic action potential in motor nerve terminals, as revealed by presynaptic focal current recordings, increased stimulus-evoked quantal content in junctions blocked by high Mg2+-low Ca2+ medium, and by BoNT/A, reversed the postsynaptic block produced by d-tubocurarine and increased the transient Ca2+ signals in response to nerve-stimulation (1-10 Hz) in nerve terminals loaded with fluo-3/AM. The results suggest that gambierol, which on equimolar basis is more potent than 3,4-diaminopyridine, can have potential application in pathologies in which it is necessary to antagonize pre- or post-synaptic neuromuscular block, or both. This article is part of a Special Issue entitled: Honoring Ricardo Miledi - outstanding neuroscientist of XX-XXI centuries.
Collapse
Affiliation(s)
- Jordi Molgó
- CEA, Institut des sciences du vivant Frédéric Joliot, Service d'Ingénierie Moléculaire des Protéines, Université Paris-Saclay, bâtiment 152, 91191 Gif sur Yvette, France; Institut des Neurosciences Paris-Saclay, UMR 9197 CNRS / Université Paris-Sud, CNRS, Gif sur Yvette, France.
| | - Sébastien Schlumberger
- Institut des Neurosciences Paris-Saclay, UMR 9197 CNRS / Université Paris-Sud, CNRS, Gif sur Yvette, France
| | - Makoto Sasaki
- Graduate School of Life Sciences, Tohoku University, Sendai, Japan
| | - Haruhiko Fuwa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University 1-13-27 Kasuga, Bunkyo, Tokyo 112-8551, Japan
| | - M Carmen Louzao
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo, Spain
| | - Luis M Botana
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo, Spain
| | - Denis Servent
- CEA, Institut des sciences du vivant Frédéric Joliot, Service d'Ingénierie Moléculaire des Protéines, Université Paris-Saclay, bâtiment 152, 91191 Gif sur Yvette, France
| | - Evelyne Benoit
- CEA, Institut des sciences du vivant Frédéric Joliot, Service d'Ingénierie Moléculaire des Protéines, Université Paris-Saclay, bâtiment 152, 91191 Gif sur Yvette, France; Institut des Neurosciences Paris-Saclay, UMR 9197 CNRS / Université Paris-Sud, CNRS, Gif sur Yvette, France
| |
Collapse
|
7
|
Khan T, Yaragorla S. Iodocyclization of Propargyl Alcohols: Highly Facile Approach to Hetero/Carbocyclic Iodides. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900474] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Tabassum Khan
- School of Chemistry; University of Hyderabad; P.O.Central Universit; 500046 Gachibowli Hyderabad India
| | - Srinivasarao Yaragorla
- School of Chemistry; University of Hyderabad; P.O.Central Universit; 500046 Gachibowli Hyderabad India
| |
Collapse
|
8
|
Mori Y. Development of New Synthetic Methods Using Oxiranyl Anions and Application in the Syntheses of Polycyclic Ether Marine Natural Products. Chem Pharm Bull (Tokyo) 2019; 67:1-17. [DOI: 10.1248/cpb.c18-00699] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yuji Mori
- Faculty of Pharmacy, Meijo University
| |
Collapse
|
9
|
Sakai T, Fukuta A, Nakamura K, Nakano M, Mori Y. Total Synthesis of Brevisamide Using an Oxiranyl Anion Strategy. J Org Chem 2016; 81:3799-808. [PMID: 27057586 DOI: 10.1021/acs.joc.6b00484] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A total synthesis of brevisamide, a marine monocyclic ether amide isolated from the dinoflagellate Karenia brevis, has been achieved in 18 steps starting from 4-(benzyloxy)butanol. The synthesis involves oxiranyl anion coupling between an epoxy sulfone and a triflate, intramolecular etherification of a hydroxy-bromoketone, diastereoselective introduction of the axial methyl group by hydroxyl-directed hydrogenation of an exocyclic olefin, and installation of an acetamide side chain by nucleophilic substitution of an N-acetyl carbamate. The dienal side chain is assembled using a Horner-Wadsworth-Emmons reaction to complete the synthesis.
Collapse
Affiliation(s)
- Takeo Sakai
- Faculty of Pharmacy, Meijo University , 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Ayumi Fukuta
- Faculty of Pharmacy, Meijo University , 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Kumiko Nakamura
- Faculty of Pharmacy, Meijo University , 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Masato Nakano
- Faculty of Pharmacy, Meijo University , 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Yuji Mori
- Faculty of Pharmacy, Meijo University , 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| |
Collapse
|
10
|
Candeias NR, Paterna R, Gois PMP. Homologation Reaction of Ketones with Diazo Compounds. Chem Rev 2016; 116:2937-81. [DOI: 10.1021/acs.chemrev.5b00381] [Citation(s) in RCA: 201] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Nuno R. Candeias
- Department
of Chemistry and Bioengineering, Tampere University of Technology, Korkeakoulunkatu 8, Tampere, FI-33101 Finland
| | - Roberta Paterna
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidad of Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | - Pedro M. P. Gois
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidad of Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| |
Collapse
|
11
|
Sakai T, Matsushita S, Arakawa S, Mori K, Tanimoto M, Tokumasu A, Yoshida T, Mori Y. Total Synthesis of Gymnocin-A. J Am Chem Soc 2015; 137:14513-6. [PMID: 26521846 DOI: 10.1021/jacs.5b10082] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A convergent total synthesis of cytotoxic marine natural polycyclic ether, gymnocin-A (1), is described. The synthesis features three iterations of an oxiranyl anion strategy, involving base-mediated cycloetherification, ring expansion, and reductive etherification, for the construction of the FGH fragment and for its coupling with the ABC and KLMN fragments.
Collapse
Affiliation(s)
- Takeo Sakai
- Faculty of Pharmacy, Meijo University , Yagotoyama 150, Tempaku-ku, Nagoya 468-8503, Japan
| | - Shingo Matsushita
- Faculty of Pharmacy, Meijo University , Yagotoyama 150, Tempaku-ku, Nagoya 468-8503, Japan
| | - Shogo Arakawa
- Faculty of Pharmacy, Meijo University , Yagotoyama 150, Tempaku-ku, Nagoya 468-8503, Japan
| | - Koichi Mori
- Faculty of Pharmacy, Meijo University , Yagotoyama 150, Tempaku-ku, Nagoya 468-8503, Japan
| | - Miki Tanimoto
- Faculty of Pharmacy, Meijo University , Yagotoyama 150, Tempaku-ku, Nagoya 468-8503, Japan
| | - Akihiro Tokumasu
- Faculty of Pharmacy, Meijo University , Yagotoyama 150, Tempaku-ku, Nagoya 468-8503, Japan
| | - Tatsuji Yoshida
- Faculty of Pharmacy, Meijo University , Yagotoyama 150, Tempaku-ku, Nagoya 468-8503, Japan
| | - Yuji Mori
- Faculty of Pharmacy, Meijo University , Yagotoyama 150, Tempaku-ku, Nagoya 468-8503, Japan
| |
Collapse
|
12
|
|
13
|
Sakai T, Asano H, Furukawa K, Oshima R, Mori Y. Synthesis of the KLMN Fragment of Gymnocin-A Using Oxiranyl Anion Convergent Methodology. Org Lett 2014; 16:2268-71. [DOI: 10.1021/ol500788c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takeo Sakai
- Faculty
of Pharmacy, Meijo University, Yagotoyama
150, Tempaku-ku, Nagoya 468-8503, Japan
| | - Haruka Asano
- Faculty
of Pharmacy, Meijo University, Yagotoyama
150, Tempaku-ku, Nagoya 468-8503, Japan
| | - Kyoko Furukawa
- Faculty
of Pharmacy, Meijo University, Yagotoyama
150, Tempaku-ku, Nagoya 468-8503, Japan
| | - Rie Oshima
- Faculty
of Pharmacy, Meijo University, Yagotoyama
150, Tempaku-ku, Nagoya 468-8503, Japan
| | - Yuji Mori
- Faculty
of Pharmacy, Meijo University, Yagotoyama
150, Tempaku-ku, Nagoya 468-8503, Japan
| |
Collapse
|
14
|
Domon D, Fujiwara K, Kawamura N, Katoono R, Kawai H, Suzuki T. A New Variant of Fused Cyclic Ether Synthesis Based on Ireland-Claisen Rearrangement and RCM. Nat Prod Commun 2013. [DOI: 10.1177/1934578x1300800718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A new variant of fused cyclic ether synthesis based on Ireland-Claisen rearrangement and ring-closing olefin metathesis (RCM) was developed. The Ireland-Claisen rearrangement and ring-closing olefin metathesis (RCM) was developed. The Ireland-Claisen rearrangement of a ( Z)-3-alkoxyprop-2-en-1-yl glycolate ester having a cyclic ether on the oxygen at C3 of the ( Z)-prop-2-en-1-yl group stereoselectively produced an anti-α,β-dialkoxyester which was successfully transformed to a fused bicyclic ether via a reaction sequence including RCM.
Collapse
Affiliation(s)
- Daisuke Domon
- Department of Chemistry Faculty of Science Hokkaido University Sapporo 606-0810 Japan
| | - Kenshu Fujiwara
- Department of Chemistry Faculty of Science Hokkaido University Sapporo 606-0810 Japan
| | - Natsumi Kawamura
- Department of Chemistry Faculty of Science Hokkaido University Sapporo 606-0810 Japan
| | - Ryo Katoono
- Department of Chemistry Faculty of Science Hokkaido University Sapporo 606-0810 Japan
| | - Hidetoshi Kawai
- Department of Chemistry Faculty of Science Hokkaido University Sapporo 606-0810 Japan
| | - Takanori Suzuki
- Department of Chemistry Faculty of Science Hokkaido University Sapporo 606-0810 Japan
| |
Collapse
|
15
|
|
16
|
Nogoshi K, Domon D, Fujiwara K, Kawamura N, Katoono R, Kawai H, Suzuki T. An Ireland–Claisen rearrangement/RCM based approach for the construction of the EF-ring of ciguatoxin 3C. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.12.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
17
|
Wang Q, Xu Z, Fan X. Selective synthesis of oxygen-containing heterocycles via tandem reactions of 1,2-allenic ketones with ethyl 4-chloroacetoacetate. RSC Adv 2013. [DOI: 10.1039/c3ra23432k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
18
|
Sakai T, Sugimoto A, Tatematsu H, Mori Y. Divergent synthesis of trans-fused polycyclic ethers by a convergent oxiranyl anion strategy. J Org Chem 2012; 77:11177-91. [PMID: 23214941 DOI: 10.1021/jo302267f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Octacyclic polyethers that correspond to the CDEFGHIJ-ring system of yessotoxin as well as G- and/or I-ring-modified analogues were synthesized in a divergent manner, starting from a common intermediate, using an [X + 2 + Y]-type convergent method. Reaction of a triflate with the oxiranyl anion generated from an epoxy sulfone, followed by ring expansion, allowed for the incorporation of medium-sized ring ethers into the key intermediate. Subsequent acetal formation and reductive etherification afforded various octacycles containing seven- and eight-membered ether rings.
Collapse
Affiliation(s)
- Takeo Sakai
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | | | | | | |
Collapse
|
19
|
Purino MA, Ramírez MA, Daranas AH, Martín VS, Padrón JI. Iron(III) Catalyzed Direct Synthesis of cis-2,7-Disubstituted Oxepanes. The Shortest Total Synthesis of (+)-Isolaurepan. Org Lett 2012; 14:5904-7. [DOI: 10.1021/ol3028016] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Martín A. Purino
- Instituto Universitario de Bio-Orgánica “Antonio González”, Departamento de Química Orgánica, Universidad de La Laguna, C/Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain, and Instituto de Productos Naturales y Agrobiología, CSIC, C/Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Miguel A. Ramírez
- Instituto Universitario de Bio-Orgánica “Antonio González”, Departamento de Química Orgánica, Universidad de La Laguna, C/Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain, and Instituto de Productos Naturales y Agrobiología, CSIC, C/Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Antonio H. Daranas
- Instituto Universitario de Bio-Orgánica “Antonio González”, Departamento de Química Orgánica, Universidad de La Laguna, C/Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain, and Instituto de Productos Naturales y Agrobiología, CSIC, C/Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Víctor S. Martín
- Instituto Universitario de Bio-Orgánica “Antonio González”, Departamento de Química Orgánica, Universidad de La Laguna, C/Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain, and Instituto de Productos Naturales y Agrobiología, CSIC, C/Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Juan I. Padrón
- Instituto Universitario de Bio-Orgánica “Antonio González”, Departamento de Química Orgánica, Universidad de La Laguna, C/Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain, and Instituto de Productos Naturales y Agrobiología, CSIC, C/Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| |
Collapse
|
20
|
Sakai T, Ito S, Furuta H, Kawahara Y, Mori Y. Mechanism of the Regio- and Diastereoselective Ring Expansion Reaction Using Trimethylsilyldiazomethane. Org Lett 2012; 14:4564-7. [DOI: 10.1021/ol302032w] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takeo Sakai
- Faculty of Pharmacy, Meijo University, Tempaku-ku, Nagoya, 468-8503, Japan
| | - Satoshi Ito
- Faculty of Pharmacy, Meijo University, Tempaku-ku, Nagoya, 468-8503, Japan
| | - Hiroki Furuta
- Faculty of Pharmacy, Meijo University, Tempaku-ku, Nagoya, 468-8503, Japan
| | - Yuki Kawahara
- Faculty of Pharmacy, Meijo University, Tempaku-ku, Nagoya, 468-8503, Japan
| | - Yuji Mori
- Faculty of Pharmacy, Meijo University, Tempaku-ku, Nagoya, 468-8503, Japan
| |
Collapse
|
21
|
Alonso E, Fuwa H, Vale C, Suga Y, Goto T, Konno Y, Sasaki M, LaFerla FM, Vieytes MR, Giménez-Llort L, Botana LM. Design and synthesis of skeletal analogues of gambierol: attenuation of amyloid-β and tau pathology with voltage-gated potassium channel and N-methyl-D-aspartate receptor implications. J Am Chem Soc 2012; 134:7467-79. [PMID: 22475455 DOI: 10.1021/ja300565t] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Gambierol is a potent neurotoxin that belongs to the family of marine polycyclic ether natural products and primarily targets voltage-gated potassium channels (K(v) channels) in excitable membranes. Previous work in the chemistry of marine polycyclic ethers has suggested the critical importance of the full length of polycyclic ether skeleton for potent biological activity. Although we have previously investigated structure-activity relationships (SARs) of the peripheral functionalities of gambierol, it remained unclear whether the whole polycyclic ether skeleton is needed for its cellular activity. In this work, we designed and synthesized two truncated skeletal analogues of gambierol comprising the EFGH- and BCDEFGH-rings of the parent compound, both of which surprisingly showed similar potency to gambierol on voltage-gated potassium channels (K(v)) inhibition. Moreover, we examined the effect of these compounds in an in vitro model of Alzheimer's disease (AD) obtained from triple transgenic (3xTg-AD) mice, which expresses amyloid beta (Aβ) accumulation and tau hyperphosphorylation. In vitro preincubation of the cells with the compounds resulted in significant inhibition of K(+) currents, a reduction in the extra- and intracellular levels of Aβ, and a decrease in the levels of hyperphosphorylated tau. In addition, pretreatment with these compounds reduced the steady-state level of the N-methyl-D-aspartate (NMDA) receptor subunit 2A without affecting the 2B subunit. The involvement of glutamate receptors was further suggested by the blockage of the effect of gambierol on tau hyperphosphorylation by glutamate receptor antagonists. The present study constitutes the first discovery of skeletally simplified, designed polycyclic ethers with potent cellular activity and demonstrates the utility of gambierol and its synthetic analogues as chemical probes for understanding the function of K(v) channels as well as the molecular mechanism of Aβ metabolism modulated by NMDA receptors.
Collapse
Affiliation(s)
- Eva Alonso
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo, Spain
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
|
23
|
Sakai T, Sugimoto A, Mori Y. A Convergent Strategy for the Synthesis of Polycyclic Ethers by Using Oxiranyl Anions. Org Lett 2011; 13:5850-3. [DOI: 10.1021/ol202467z] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takeo Sakai
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Ai Sugimoto
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Yuji Mori
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| |
Collapse
|
24
|
Zhu HT, Ji KG, Yang F, Wang LJ, Zhao SC, Ali S, Liu XY, Liang YM. Electrophilic Carbocyclization of Aryl Propargylic Alcohols: A Facile Synthesis of Diiodinated Carbocycles and Heterocycles. Org Lett 2011; 13:684-7. [DOI: 10.1021/ol1029194] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hai-Tao Zhu
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, and State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, P.R. China
| | - Ke-Gong Ji
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, and State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, P.R. China
| | - Fang Yang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, and State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, P.R. China
| | - Li-Jing Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, and State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, P.R. China
| | - Shu-Chun Zhao
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, and State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, P.R. China
| | - Shaukat Ali
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, and State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, P.R. China
| | - Xue-Yuan Liu
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, and State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, P.R. China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, and State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, P.R. China
| |
Collapse
|
25
|
Smith JA, Molesworth PP, Hyland CJ, Ryan JH. Seven-Membered Rings. PROGRESS IN HETEROCYCLIC CHEMISTRY 2011. [DOI: 10.1016/s0959-6380(11)22016-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
26
|
Six-Membered Ring Systems:. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/s0959-6380(11)22015-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
27
|
Fuwa H. Total Synthesis of Structurally Complex Marine Oxacyclic Natural Products. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2010. [DOI: 10.1246/bcsj.20100209] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
28
|
Schlumberger S, Ouanounou G, Girard E, Sasaki M, Fuwa H, Louzao MC, Botana LM, Benoit E, Molgó J. The marine polyether gambierol enhances muscle contraction and blocks a transient K+ current in skeletal muscle cells. Toxicon 2010; 56:785-91. [DOI: 10.1016/j.toxicon.2010.06.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2009] [Revised: 05/29/2010] [Accepted: 06/01/2010] [Indexed: 01/12/2023]
|
29
|
Nakata T. SmI2-induced cyclizations and their applications in natural product synthesis. CHEM REC 2010; 10:159-72. [PMID: 20503205 DOI: 10.1002/tcr.200900027] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Since the isolation of brevetoxin-B, a red tide toxin, many bioactive marine natural products featuring synthetically challenging trans-fused polycyclic ether ring systems have been reported. We have developed SmI(2)-induced cyclization of beta-alkoxyacrylate with aldehyde, affording 2,6-syn-2,3-trans-tetrahydropyran (THP) or 2,7-syn-2,3-trans-oxepane with complete stereoselection, as a key reaction of efficient iterative and bi-directional strategies for the construction of these polycyclic ethers. This reaction is also applicable to the synthesis of 3-, 5-, and 6-methyl-THPs and 3,5-dimethyl-THP. The synthesis of 2-methyl- and 2,6-dimethyl-THPs was accomplished by means of a unique methyl insertion. Recently, the SmI(2)-induced cyclization was extended to similar reactions using beta-alkoxyvinyl sulfone and sulfoxide. Reaction of (E)- and (Z)-beta-alkoxyvinyl sulfone-aldehyde afforded 2,6-syn-2,3-trans- and 2,6-syn-2,3-cis- THPs, respectively. Reaction of (E)-beta-alkoxyvinyl (R)- and (S)-sulfoxides gave 2,6-anti-2,3-cis- and 2,6-syn-2,3-trans-THPs, respectively. Reaction of (Z)-beta-alkoxyvinyl (R)-sulfoxides gave 2,6-syn-2,3-cis-THP and an olefinic product, while that of (Z)-beta-alkoxyvinyl (S)-sulfoxide afforded a mixture of many products. These SmI(2)-induced cyclizations have been applied to the total syntheses of various natural products, including brevetoxin-B, mucocin, pyranicin, and pyragonicin. Synthetic studies on gambierol and maitotoxin are also introduced.
Collapse
Affiliation(s)
- Tadashi Nakata
- Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo162-8601, Japan.
| |
Collapse
|
30
|
Furuta H, Hasegawa Y, Hase M, Mori Y. Total Synthesis of Gambierol by Using Oxiranyl Anions. Chemistry 2010; 16:7586-95. [DOI: 10.1002/chem.201000497] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
31
|
Vilotijevic I, Jamison TF. Synthesis of marine polycyclic polyethers via endo-selective epoxide-opening cascades. Mar Drugs 2010; 8:763-809. [PMID: 20411125 PMCID: PMC2857356 DOI: 10.3390/md8030763] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2010] [Revised: 03/11/2010] [Accepted: 03/18/2010] [Indexed: 11/17/2022] Open
Abstract
The proposed biosynthetic pathways to ladder polyethers of polyketide origin and oxasqualenoids of terpenoid origin share a dramatic epoxide-opening cascade as a key step. Polycyclic structures generated in these biosynthetic pathways display biological effects ranging from potentially therapeutic properties to extreme lethality. Much of the structural complexity of ladder polyether and oxasqualenoid natural products can be traced to these hypothesized cascades. In this review we summarize how such epoxide-opening cascade reactions have been used in the synthesis of ladder polyethers and oxasqualenoid natural products.
Collapse
Affiliation(s)
- Ivan Vilotijevic
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA; E-Mail:
(I.V.)
| | - Timothy F. Jamison
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA; E-Mail:
(I.V.)
| |
Collapse
|
32
|
|
33
|
Nakata T. SmI2-induced reductive cyclizations for the synthesis of cyclic ethers and applications in natural product synthesis. Chem Soc Rev 2010; 39:1955-72. [DOI: 10.1039/b902737h] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|