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Usuki Y, Tanaka Y, Morii M, Satoh T. Total synthesis of isoneoantimycin. Org Biomol Chem 2023; 21:2398-2404. [PMID: 36857695 DOI: 10.1039/d3ob00099k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Antimycins are one of the well-known antifungal metabolites produced by Streptomyces bacteria. Neoantimycin and its analogues, the ring-expanded antimycins featuring a 15-membered tetraester ring, have been shown to be effective regulators of the oncogenic proteins GRP78/BiP and K-Ras. Isoneoantimycin was isolated from Streptomyces fradiae IFO12773 (ISP 5063) as a minor metabolite during the fermentation of neoantimycin and is the first reported antibiotic of the antimycin family without the macrolide core. In this study, we explored the total synthesis and stereochemical assignment of isoneoantimycin as an approach to perform structure-activity studies on neoantimycins. Taking the neoantimycin biosynthesis pathway into account, we presumed that the stereochemistry of isoneoantimycin is the same as that of neoantimycin. The synthesis of our target molecule with the (1S,2R,5S,6S,14R,15R,17S) configuration has been achieved by using chiral-pool building blocks. A comparison of the spectroscopic data between the synthetic and natural samples verified our presumption of the stereochemistry of natural isoneoantimycin.
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Affiliation(s)
- Yoshinosuke Usuki
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan.
| | - Yuka Tanaka
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan.
| | - Miyu Morii
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan.
| | - Tetsuya Satoh
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan.
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Hennessy MC, O'Sullivan TP. Recent advances in the transesterification of β-keto esters. RSC Adv 2021; 11:22859-22920. [PMID: 35480467 PMCID: PMC9036406 DOI: 10.1039/d1ra03513d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 06/13/2021] [Indexed: 12/15/2022] Open
Abstract
The ability to selectively transesterify β-keto esters is a useful transformation in organic synthesis. The increasing interest in transesterification for the synthesis of compounds of pharmaceutical importance, as well as for biodiesel production, has led to the development of a variety of different approaches. This article aims to summarise recent advances in the transesterifications of β-keto esters. Particular interest has been paid to methodologies with minimal environmental impact. This review summarises the many advances in the selective transesterification of β-keto esters, with a particular focus on the past 30 years.![]()
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Affiliation(s)
- M C Hennessy
- School of Chemistry, University College Cork Cork Ireland .,Analytical and Biological Chemistry Research Facility, University College Cork Cork Ireland
| | - T P O'Sullivan
- School of Chemistry, University College Cork Cork Ireland .,Analytical and Biological Chemistry Research Facility, University College Cork Cork Ireland.,School of Pharmacy, University College Cork Cork Ireland
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3
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Hamada C, Usuki Y, Takeuchi D, Ogawa H, Abe R, Satoh T. Total Syntheses and Configuration Assignments of JBIR-06 and Related Depsipeptides. Org Lett 2019; 21:965-968. [DOI: 10.1021/acs.orglett.8b03944] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chie Hamada
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Yoshinosuke Usuki
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Daiki Takeuchi
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Hikaru Ogawa
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Ryota Abe
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Tetsuya Satoh
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
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Chojnacka MW, Batey RA. Total Synthesis of (+)-Prunustatin A: Utility of Organotrifluoroborate-Mediated Prenylation and Shiina MNBA Esterification and Macrolactonization To Avoid a Competing Thorpe–Ingold Effect Accelerated Transesterification. Org Lett 2018; 20:5671-5675. [DOI: 10.1021/acs.orglett.8b02396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maja W. Chojnacka
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto ON, Canada M5S 3H6
| | - Robert A. Batey
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto ON, Canada M5S 3H6
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Usuki Y, Hamada C, Satoh T. Total syntheses and configuration assignments of JBIR-04 and unantimycin A. Org Biomol Chem 2017; 15:7346-7351. [DOI: 10.1039/c7ob01732d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(2S,4S,6S,7R,9S,28S) configuration was assigned via total syntheses of JBIR-04 and unantimycin A.
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Affiliation(s)
- Yoshinosuke Usuki
- Department of Chemistry
- Graduate School of Science
- Osaka City University
- Osaka 558-8585
- Japan
| | - Chie Hamada
- Department of Chemistry
- Graduate School of Science
- Osaka City University
- Osaka 558-8585
- Japan
| | - Tetsuya Satoh
- Department of Chemistry
- Graduate School of Science
- Osaka City University
- Osaka 558-8585
- Japan
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Nallasivam JL, Fernandes RA. Pd-Catalyzed Site-Selective Mono-allylic Substitution and Bis-arylation by Directed Allylic C-H Activation: Synthesis of anti-γ-(Aryl,Styryl)-β-hydroxy Acids and Highly Substituted Tetrahydrofurans. J Am Chem Soc 2016; 138:13238-13245. [PMID: 27618469 DOI: 10.1021/jacs.6b06438] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
An efficient palladium-catalyzed site-selective arylation of γ-vinyl-γ-lactone by aryl boronic acid has been developed. γ-Vinyl-γ-lactone 1a has been contemplated as allyl electrophile donor for allylic arylation via π-allyl palladium intermediate using 1.5 equiv of aryl boronic acid 2. Using 3.0 equiv of the latter resulted in mono-arylation by allylic substitution and subsequent site-selective second arylation by directed allylic C-H activation giving stereoselectively anti-γ-(aryl,styryl)-β-hydroxy acids. Presence of O2 was crucial for the second arylation via Pd(II) catalysis. Thus, a good synergy of dual catalysis by Pd(0) and Pd(II) was observed. This methodology has been elaborated to synthesize highly substituted tetrahydrofurans including aryl-Hagen's gland lactone analogues via intramolecular iodoetherification.
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Affiliation(s)
- Jothi L Nallasivam
- Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai 400076, India
| | - Rodney A Fernandes
- Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai 400076, India
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Manaviazar S, Nockemann P, Hale KJ. Total Synthesis of the GRP78-Downregulatory Macrolide (+)-Prunustatin A, the Immunosuppressant (+)-SW-163A, and a JBIR-04 Diastereoisomer That Confirms JBIR-04 Has Nonidentical Stereochemistry to (+)-Prunustatin A. Org Lett 2016; 18:2902-5. [DOI: 10.1021/acs.orglett.6b01235] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Soraya Manaviazar
- School of Chemistry & Chemical Engineering and Centre for Cancer Research and Cell Biology (CCRCB), Queen’s University Belfast, Stranmillis Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
| | - Peter Nockemann
- School of Chemistry & Chemical Engineering and Centre for Cancer Research and Cell Biology (CCRCB), Queen’s University Belfast, Stranmillis Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
| | - Karl J. Hale
- School of Chemistry & Chemical Engineering and Centre for Cancer Research and Cell Biology (CCRCB), Queen’s University Belfast, Stranmillis Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
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