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Kanehara R, Oinuma Y, Maeda H, Okazaki M, Konno K, Tanaka K, Hashimoto M. Pseudo-Enantiomeric Paraphaeolactones and Their Biosynthetic Derivatives from Paraphaeosphaeria sp. KT4192: A Proposition of a Favorskii Rearrangement for Their Biosynthesis. JOURNAL OF NATURAL PRODUCTS 2023; 86:1832-1843. [PMID: 37385971 DOI: 10.1021/acs.jnatprod.3c00373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Abstract
Paraphaeolactones A1, A2, B1, and B2 (1-4, respectively), known arthropsadiol D (5), massariphenone (6) and its positional isomer 7, and massarilactones E (8) and G (9) were isolated from the culture broth of Paraphaeosphaeria sp. KT4192. Although the structural resemblance between 1 and 2 implies that these comprised a diastereomeric pair at the C-2 stereogenic center, electronic circular dichroism (ECD) spectral analyses revealed that they were pseudo-enantiomers possessing the common (2R)-configuration. Paraphaeolactones B1 and B2 (3 and 4) were the derivatives of 2, which equipped the 3-(1-hydroxy-2-oxopropyl)-4-methylcatechol moiety via an acetal bond at C-10. The relative configurations of their acetal carbons were elucidated by NOE experiments, and those of C-8' were deduced independently by ECD spectral analysis. The present study disclosed that 1-5, 8, and 9 contain a methylcyclohexene substructure with the same absolute configuration. This prompted us to reinvestigate the absolute configurations of known structurally related fungal metabolites, allowing us to conclude that the methylcyclohexene moieties of these natural products have the same absolute configuration despite the variety of configurations of other stereogenic centers. The plausible biosynthetic routes for 1-9 are discussed on the basis of the above conclusion. We propose a Favorskii rearrangement as the key transformation for biosyntheses of 1-4.
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Affiliation(s)
- Ryuhi Kanehara
- Faculty of Agriculture and Life Science, Hirosaki University, 3-Bunkyo-cho, Hirosaki, 036-8561, Japan
| | - Yuki Oinuma
- Faculty of Agriculture and Life Science, Hirosaki University, 3-Bunkyo-cho, Hirosaki, 036-8561, Japan
| | - Hayato Maeda
- Faculty of Agriculture and Life Science, Hirosaki University, 3-Bunkyo-cho, Hirosaki, 036-8561, Japan
| | - Masaaki Okazaki
- Graduate School of Science and Technology, Hirosaki University, 3-Bunkyo-cho, Hirosaki, 036-8561, Japan
| | - Katsuhiro Konno
- Institute of Natural Medicine, University of Toyama, Toyama, 930-0194, Japan
| | - Kazuaki Tanaka
- Faculty of Agriculture and Life Science, Hirosaki University, 3-Bunkyo-cho, Hirosaki, 036-8561, Japan
| | - Masaru Hashimoto
- Faculty of Agriculture and Life Science, Hirosaki University, 3-Bunkyo-cho, Hirosaki, 036-8561, Japan
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Kim JH, Lagojda A, Kuehne D, Tshitenge DT, Chaudhuri S, Walker DP, Head G. Determination of Cotton as a Larval Feeding Source for Lepidopteran Moths Using a Derivative from Cotton Metabolites as a Marker by LC-MS/MS Method. J Chem Ecol 2020; 46:956-966. [DOI: 10.1007/s10886-020-01219-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 08/12/2020] [Accepted: 09/09/2020] [Indexed: 11/28/2022]
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3
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Arayama M, Maeda H, Tanaka K, Takada N, Nehira T, Hashimoto M. Achaetolide-II isolated from Helminthosporium velutinum TS28. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.08.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Neomacrophorin I, II, and III, novel drimenyl cyclohexanes with hydroxylated butanoates from Trichoderma sp. 1212-03. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.12.087] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Yasumura R, Tanaka K, Nehira T, Hashimoto M. Structural corrections of photinides A, B and their novel derivatives. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.06.108] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Pridgen LN, De Brosse C. Reliable (13)C NMR Method of Making Relative Stereochemical Assignments to Certain N-[alpha-Hetero-beta-hydroxy(acetoxy)-beta-(substituted phenyl)-1'-oxopropyl]-2-oxazolidinones. J Org Chem 1997; 62:216-220. [PMID: 11671387 DOI: 10.1021/jo951798l] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lendon N. Pridgen
- Synthetic Chemistry Department, Chemical, R&D, SmithKline & Beecham Pharmaceuticals Post Office Box 1539, King of Prussia, Pennsylvania 19406
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