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Kashiwazaki G, Watanabe R, Tsuzuki T, Yamamoto C, Nishikawa A, Ohtomo S, Yoshikawa T, Kitamura Y, Utaka Y, Kawai Y, Tsuchida N, Kitayama T. Brønsted acid-induced transannulation of the phytochemical zerumbone. Org Biomol Chem 2021; 19:10444-10454. [PMID: 34812828 DOI: 10.1039/d1ob01634b] [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: 11/21/2022]
Abstract
The sesquiterpene zerumbone was treated with HCl in ethyl acetate under the light-protected condition, and the time-dependent conversions were analyzed by gas chromatography. Nine products were isolated, and their structures were revealed by several NMR measurements such as 1H NMR, 13C{1H} NMR, distortionless enhancement by polarization transfer (DEPT)-135, 1H-1H correlation spectroscopy (COSY), 1H-13C heteronuclear multiple quantum coherence (HMQC), and 1H-13C heteronuclear multiple bond coherence (HMBC). The X-ray crystallography determined the stereochemistries of the three products and the two derivatives. After all, this acidic reaction was found to provide the (2Z,6E,10E)-isomer, the two HCl adducts, the two 7,6-bicyclic compounds, the valence isomers cycloheptatriene and norcaradiene, and the two dihydronaphthalenes. Based on the product analyses of the reactions from the isolated intermediates as well as the mechanistic considerations, these products were arranged into two paths: one of the paths ended in the two dihydronaphthalenes the same as previously reported under the Lewis acid condition; the other ended in the 7,6-bicyclic compound, the epimer of which was known. In addition, density functional theory (DFT) calculations indicated that the (2Z,6E,10E)-isomer was more stable than the (2E,6E,10Z)-isomer as well as that the activation energy for the isomerization at the C2-C3 double bond decreased to half by protonation. The closely examined reaction mechanisms under the simple acidic condition were established upon the intensive characterization of the intermediates and products, and these findings would add to the attractive value of zerumbone and would help understand the unknown biosynthetic pathway around sesquiterpenoids.
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Affiliation(s)
- Gengo Kashiwazaki
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara, Nara 631-8505, Japan.
| | - Ryo Watanabe
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara, Nara 631-8505, Japan.
| | - Terutaka Tsuzuki
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara, Nara 631-8505, Japan.
| | - Chieko Yamamoto
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara, Nara 631-8505, Japan.
| | - Atsuya Nishikawa
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara, Nara 631-8505, Japan.
| | - Satoru Ohtomo
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara, Nara 631-8505, Japan.
| | - Tomomi Yoshikawa
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara, Nara 631-8505, Japan.
| | - Yuto Kitamura
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara, Nara 631-8505, Japan.
| | - Yoshimi Utaka
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara, Nara 631-8505, Japan.
| | - Yasushi Kawai
- Faculty of Bioscience, Nagahama Institute of Bio-Science and Technology, Nagahama, Shiga 526-0829, Japan
| | - Noriko Tsuchida
- Faculty of Medicine, Saitama Medical University, Moroyama, Saitama 350-0495, Japan
| | - Takashi Kitayama
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara, Nara 631-8505, Japan.
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Biji M, Prabha B, Lankalapalli RS, Radhakrishnan KV. Transition Metal/Lewis Acid Catalyzed Reactions of Zerumbone for Diverse Molecular Motifs. CHEM REC 2021; 21:3943-3953. [PMID: 34708494 DOI: 10.1002/tcr.202100206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 09/12/2021] [Accepted: 09/13/2021] [Indexed: 11/09/2022]
Abstract
Zerumbone is a naturally occurring humulene type sesquiterpene, isolated from the rhizomes of Zingiber zerumbet (L.) Smith with excellent therapeutic potential and is recognized as a valuable synthon for the construction of diverse array of natural product motifs. In this review, we intended to highlight our achievements in utilizing abundant natural product zerumbone and its derivatives for the development of pharmacologically relevant molecular scaffolds. We provided an account of the transition-metal catalyzed 1,4-conjugate addition reactions of zerumbone and its derivatives along with palladium-catalyzed cross-couplings, transition metal-based Lewis acid promoted interrupted Nazarov cyclisation reaction with substituted indoles and transannular cyclizations, photo-induced transformations of zerumbone and its epoxide.
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Affiliation(s)
- Mohanan Biji
- Organic Chemistry Section, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, India-, 695019.,Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Bernard Prabha
- Organic Chemistry Section, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, India-, 695019
| | - Ravi S Lankalapalli
- Organic Chemistry Section, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, India-, 695019.,Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Kokkuvayil Vasu Radhakrishnan
- Organic Chemistry Section, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, India-, 695019.,Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, India
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3
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Biji M, Radhakrishnan KV, Lankalapalli RS. Tandem Photoisomerization and Transannular Cyclizations of Zerumbone Epoxide: A Model for Diversity-Oriented Synthesis Using Abundant Natural Products. Org Lett 2021; 23:5871-5875. [PMID: 34254812 DOI: 10.1021/acs.orglett.1c01997] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Photoirradiation of (6E,9E)-zerumbone-2,3-epoxide afforded a diverse range of transannular cyclized products in the presence of a catalytic amount of Sc(OTf)3. At the behest of the geometrical isomers produced by photoirradiation, the diversity encompasses an unprecedented eudesmane core and oxo-bridged hydroxy-olefin skeletons. Structure elucidation and the stereochemical outcome of the products are described via extensive NMR analysis. The present study serves as a model for tandem photoisomerization and transannular cyclization of natural products with enone/dienone functionality.
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Affiliation(s)
- Mohanan Biji
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, India.,Academy of Scientific & Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Kokkuvayil Vasu Radhakrishnan
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, India.,Academy of Scientific & Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ravi S Lankalapalli
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, India.,Academy of Scientific & Innovative Research (AcSIR), Ghaziabad 201002, India
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4
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Veena KS, Gopalan G, Madhukrishnan M, Varughese S, Radhakrishnan KV, Lankalapalli RS. Putative Biomimetic Route to 8-Oxabicyclo[3.2.1]octane Motif from a Humulene Sesquiterpenoid Zerumbone. Org Lett 2020; 22:6409-6413. [PMID: 32806166 DOI: 10.1021/acs.orglett.0c02220] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An approach to expand the diversity of terpenes to novel polycyclic skeletons with contiguous stereogenic centers is described. An unprecedented 8-oxabicyclo[3.2.1]octane motif was obtained in quantitative yield by photoirradiation of zerumbone in the presence of a catalytic amount of Lewis acid. The vital role of light in the isomerization of double bonds in zerumbone, which ensued cyclization via tertiary carbocation intermediate, emulates a biosynthetic route. Synthetic diversification of the phototransformed product afforded epoxy derivatives with up to seven contiguous stereogenic centers and eight-member ring fused tricyclic motifs. The present work sheds light on the possible role of UV irradiation in the biosynthesis of oxo-bridged tricyclic structures from polyene terpenes.
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Affiliation(s)
- Kollery S Veena
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram-695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Greeshma Gopalan
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram-695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Murali Madhukrishnan
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram-695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Sunil Varughese
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram-695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Kokkuvayil Vasu Radhakrishnan
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram-695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Ravi S Lankalapalli
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram-695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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Utaka Y, Kashiwazaki G, Tsuchida N, Fukushima M, Takahashi I, Kawai Y, Kitayama T. Remarkable Potential of Zerumbone to Generate a Library with Six Natural Product-like Skeletons by Natural Material-Related Diversity-Oriented Synthesis. J Org Chem 2020; 85:8371-8386. [PMID: 32524816 DOI: 10.1021/acs.joc.0c00689] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Diversity-oriented synthesis (DOS) is an effective strategy for the quick creation of diverse and high three-dimensional compounds from simple starting materials. The selection of a starting material is the key to constructing useful, chemically diverse compound libraries for the development of new drugs. Here, we report a novel, general, and facile strategy for the creation of diverse compounds with high structural diversity from readily available natural products, such as zerumbone, as the synthetic starting material. Zerumbone is the major component of the essential oil from wild ginger, Zingiber zerumbet Smith. It is noteworthy that zerumbone has a powerful latent reactivity, partly because of its three double bonds, two conjugated and one isolated, and a double conjugated carbonyl group in an 11-membered ring structure. In fact, zerumbone has been shown to be a successful example of natural material-related DOS (NMRDOS). We will report that zerumbone can be converted in one chemical step from four zerumbone derivatives into rare and markedly different scaffolds by transannulation.
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Affiliation(s)
- Yoshimi Utaka
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara 631-8505, Japan
| | - Gengo Kashiwazaki
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara 631-8505, Japan
| | - Noriko Tsuchida
- Faculty of Medicine, Saitama Medical University, Saitama 350-0495, Japan
| | - Miyuki Fukushima
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara 631-8505, Japan
| | - Issei Takahashi
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara 631-8505, Japan
| | - Yasushi Kawai
- Nagahama Institute of Bio-Science and Technology, Nagahama, Shiga 526-0829, Japan
| | - Takashi Kitayama
- Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara 631-8505, Japan
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Tan YP, Savchenko AI, Agnew-Francis KA, Boyle GM, Bernhardt PV, Fraser JA, Williams CM. Kalparinol, a Salvialane (Isodaucane) Sesquiterpenoid Derived from Native Australian Dysphania Species That Suggests a Putative Biogenetic Link to Zerumbone. JOURNAL OF NATURAL PRODUCTS 2020; 83:1473-1479. [PMID: 32302147 DOI: 10.1021/acs.jnatprod.9b01039] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Dysphania is a genus of plants endemic to the Australian continent, occurring primarily in arid and temperate zones. Despite their prevalence, very little in the way of phytochemical and/or bioactivity investigation of native Dysphania has been performed. Herein reported is the isolation and elucidation of (6E,9E)-zerumbone epoxide and a hitherto unreported isomer, (6Z,9E)-zerumbone epoxide, from D. kalpari. In addition, a novel isodaucane sesquiterepene, kalparinol, was isolated from both D. kalpari and D. rhadinostachya. The coisolation of the humulene and isodaucane skeletons, combined with the lack of any cadalane systems, could suggest an alternate novel biogenetic pathway originating from zerumbone, which is unlike any other proposals for the isodaucene system.
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Affiliation(s)
- Yuen Ping Tan
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072 Queensland, Australia
| | - Andrei I Savchenko
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072 Queensland, Australia
| | - Kylie A Agnew-Francis
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072 Queensland, Australia
| | - Glen M Boyle
- QIMR Berghofer Medical Research Institute, PO Royal Brisbane Hospital, Brisbane, 4029 Queensland, Australia
| | - Paul V Bernhardt
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072 Queensland, Australia
| | - James A Fraser
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072 Queensland, Australia
| | - Craig M Williams
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072 Queensland, Australia
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Christiaens M, Hullaert J, Van Hecke K, Laplace D, Winne JM. Stereoselective and Modular Assembly Method for Heterocycle-Fused Daucane Sesquiterpenoids. Chemistry 2018; 24:13783-13787. [DOI: 10.1002/chem.201803248] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Indexed: 01/31/2023]
Affiliation(s)
- Mien Christiaens
- Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 Gent 9000 Belgium
| | - Jan Hullaert
- Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 Gent 9000 Belgium
| | - Kristof Van Hecke
- Department of Chemistry; Ghent University; Krijgslaan 281 S3 Gent 9000 Belgium
| | - Duchan Laplace
- Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 Gent 9000 Belgium
| | - Johan M. Winne
- Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 Gent 9000 Belgium
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