1
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Spieß P, Matheu SA, Bauer A, Coussanes G, Shaaban S, Maulide N. Ni-Catalyzed Stereoconvergent Reductive Dimerization of Bromocyclobutenes. Org Lett 2024; 26:355-359. [PMID: 38147458 PMCID: PMC10789092 DOI: 10.1021/acs.orglett.3c03909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/18/2023] [Accepted: 12/20/2023] [Indexed: 12/28/2023]
Abstract
A nickel-catalyzed reductive dimerization of bromocyclobutenes to produce unusual and unprecedented cyclobutene dimers was developed. In a stereoconvergent procedure, various bromocyclobutenes were readily dimerized in good yields, with good diastereoselectivities and broad functional group tolerance. Notably, the presence of a carbonyl group in the starting material appears to dictate diastereoselectivity.
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Affiliation(s)
| | | | - Adriano Bauer
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Guilhem Coussanes
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Saad Shaaban
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Nuno Maulide
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
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2
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Feng KN, Zhang Y, Zhang M, Yang YL, Liu JK, Pan L, Zeng Y. A flavin-monooxygenase catalyzing oxepinone formation and the complete biosynthesis of vibralactone. Nat Commun 2023; 14:3436. [PMID: 37301868 PMCID: PMC10257657 DOI: 10.1038/s41467-023-39108-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 05/25/2023] [Indexed: 06/12/2023] Open
Abstract
Oxepinone rings represent one of structurally unusual motifs of natural products and the biosynthesis of oxepinones is not fully understood. 1,5-Seco-vibralactone (3) features an oxepinone motif and is a stable metabolite isolated from mycelial cultures of the mushroom Boreostereum vibrans. Cyclization of 3 forms vibralactone (1) whose β-lactone-fused bicyclic core originates from 4-hydroxybenzoate, yet it remains elusive how 4-hydroxybenzoate is converted to 3 especially for the oxepinone ring construction in the biosynthesis of 1. In this work, using activity-guided fractionation together with proteomic analyses, we identify an NADPH/FAD-dependent monooxygenase VibO as the key enzyme performing a crucial ring-expansive oxygenation on the phenol ring to generate the oxepin-2-one structure of 3. The crystal structure of VibO reveals that it forms a dimeric phenol hydroxylase-like architecture featured with a unique substrate-binding pocket adjacent to the bound FAD. Computational modeling and solution studies provide insight into the likely VibO active site geometry, and suggest possible involvement of a flavin-C4a-OO(H) intermediate.
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Affiliation(s)
- Ke-Na Feng
- State Key Laboratory of Phytochemistry and Plant Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - Yue Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Mingfang Zhang
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Yan-Long Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Ji-Kai Liu
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan, 430074, China
| | - Lifeng Pan
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200032, China.
| | - Ying Zeng
- State Key Laboratory of Phytochemistry and Plant Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China.
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3
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Dobler D, Leitner M, Moor N, Reiser O. 2‐Pyrone – A Privileged Heterocycle and Widespread Motif in Nature. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101112] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Daniel Dobler
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Michael Leitner
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Natalija Moor
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Oliver Reiser
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Germany
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4
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Biletskyi B, Colonna P, Masson K, Parrain JL, Commeiras L, Chouraqui G. Small rings in the bigger picture: ring expansion of three- and four-membered rings to access larger all-carbon cyclic systems. Chem Soc Rev 2021; 50:7513-7538. [PMID: 34002179 DOI: 10.1039/d0cs01396j] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The release of the inherent ring strain of cyclobutane and cyclopropane derivatives allows a rapid build-up of molecular complexity. This review highlights the state-of-the-art of the ring expansions of three- and four-membered cycles and is organised by types of reactions with emphasis on the reaction mechanisms. Selected examples are discussed to illustrate the synthetic potential of this elegant synthetic tool.
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Affiliation(s)
- Bohdan Biletskyi
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Pierre Colonna
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Kévin Masson
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Jean-Luc Parrain
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Laurent Commeiras
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Gaëlle Chouraqui
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
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5
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Fernandes RA, Kumar P, Choudhary P. Advances in catalytic and protecting-group-free total synthesis of natural products: a recent update. Chem Commun (Camb) 2020; 56:8569-8590. [PMID: 32537619 DOI: 10.1039/d0cc02659j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Catalytic processes in protecting-group-free syntheses of natural products are fast emerging towards achieving the goal of efficiency and economy in total synthesis. Present day sustainable development in synthesis of natural products does not permit the luxury of using stoichiometric reagents and protecting groups. Catalysis and step-economy can contribute significantly toward economy and efficiency of synthesis. This feature article details the ingenious efforts by many researchers in the last couple of years toward concise total syntheses, based on catalytic steps and protecting-group-free-strategies. These would again serve as guidelines in future development of reagents and catalysts aimed at achieving higher efficiency and chemoselectivity to the point that catalysis and protecting-group-free synthesis will be an accepted common practice.
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Affiliation(s)
- Rodney A Fernandes
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, Maharashtra, India.
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6
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Structurally diverse vibralactones produced by the fungus Stereum hirsutum. Bioorg Chem 2020; 99:103760. [DOI: 10.1016/j.bioorg.2020.103760] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 02/13/2020] [Accepted: 03/13/2020] [Indexed: 02/07/2023]
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7
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Nistanaki SK, Nelson HM. Dewar Heterocycles as Versatile Monomers for Ring-Opening Metathesis Polymerization. ACS Macro Lett 2020; 9:731-735. [PMID: 34306822 DOI: 10.1021/acsmacrolett.0c00227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
We report the utility of readily available heterocycles as precursors to unique ring-opening metathesis polymerization (ROMP) monomers. Photochemical valence isomerization reactions of pyridones, dihydropyridines, and pyrones dearomatize the parent heterocycles to their highly strained Dewar isomers, which readily engage in controlled ROMP reactions using Grubbs catalysts. This strategy is used to access polymer backbones that contain strained β-lactam and azetidine cores, which can be further derivatized using post-polymerization chemistries. We demonstrate this through the synthesis of water-soluble β-amino acid polymers that have potential applications as biomedical materials, along with the synthesis of highly-soluble poly(acetylene) derivatives, which have potential applications as organic conductive materials derived from bio-feedstock chemicals.
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Affiliation(s)
- Sepand K Nistanaki
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Hosea M Nelson
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
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8
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Lautié E, Russo O, Ducrot P, Boutin JA. Unraveling Plant Natural Chemical Diversity for Drug Discovery Purposes. Front Pharmacol 2020; 11:397. [PMID: 32317969 PMCID: PMC7154113 DOI: 10.3389/fphar.2020.00397] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 03/16/2020] [Indexed: 12/11/2022] Open
Abstract
The screening and testing of extracts against a variety of pharmacological targets in order to benefit from the immense natural chemical diversity is a concern in many laboratories worldwide. And several successes have been recorded in finding new actives in natural products, some of which have become new drugs or new sources of inspiration for drugs. But in view of the vast amount of research on the subject, it is surprising that not more drug candidates were found. In our view, it is fundamental to reflect upon the approaches of such drug discovery programs and the technical processes that are used, along with their inherent difficulties and biases. Based on an extensive survey of recent publications, we discuss the origin and the variety of natural chemical diversity as well as the strategies to having the potential to embrace this diversity. It seemed to us that some of the difficulties of the area could be related with the technical approaches that are used, so the present review begins with synthetizing some of the more used discovery strategies, exemplifying some key points, in order to address some of their limitations. It appears that one of the challenges of natural product-based drug discovery programs should be an easier access to renewable sources of plant-derived products. Maximizing the use of the data together with the exploration of chemical diversity while working on reasonable supply of natural product-based entities could be a way to answer this challenge. We suggested alternative ways to access and explore part of this chemical diversity with in vitro cultures. We also reinforced how important it was organizing and making available this worldwide knowledge in an "inventory" of natural products and their sources. And finally, we focused on strategies based on synthetic biology and syntheses that allow reaching industrial scale supply. Approaches based on the opportunities lying in untapped natural plant chemical diversity are also considered.
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Affiliation(s)
- Emmanuelle Lautié
- Centro de Valorização de Compostos Bioativos da Amazônia (CVACBA)-Instituto de Ciências Biológicas, Universidade Federal do Pará (UFPA), Belém, Brazil
| | - Olivier Russo
- Institut de Recherches Internationales SERVIER, Suresnes, France
| | - Pierre Ducrot
- Molecular Modelling Department, 'PEX Biotechnologie, Chimie & Biologie, Institut de Recherches SERVIER, Croissy-sur-Seine, France
| | - Jean A Boutin
- Institut de Recherches Internationales SERVIER, Suresnes, France
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9
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Feng K, Yang Y, Xu Y, Zhang Y, Feng T, Huang S, Liu J, Zeng Y. A Hydrolase‐Catalyzed Cyclization Forms the Fused Bicyclic β‐Lactone in Vibralactone. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000710] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ke‐Na Feng
- State Key Laboratory of Phytochemistry and Plant Resources in West ChinaYunnan Key Laboratory of Natural Medicinal ChemistryKunming Institute of BotanyChinese Academy of Sciences Kunming 650201 Yunnan China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Yan‐Long Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West ChinaYunnan Key Laboratory of Natural Medicinal ChemistryKunming Institute of BotanyChinese Academy of Sciences Kunming 650201 Yunnan China
| | - Yu‐Xing Xu
- State Key Laboratory of Phytochemistry and Plant Resources in West ChinaYunnan Key Laboratory of Natural Medicinal ChemistryKunming Institute of BotanyChinese Academy of Sciences Kunming 650201 Yunnan China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Yue Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West ChinaYunnan Key Laboratory of Natural Medicinal ChemistryKunming Institute of BotanyChinese Academy of Sciences Kunming 650201 Yunnan China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Tao Feng
- School of Pharmaceutical SciencesSouth-Central University for Nationalities Wuhan 430074 Hubei China
| | - Sheng‐Xiong Huang
- State Key Laboratory of Phytochemistry and Plant Resources in West ChinaYunnan Key Laboratory of Natural Medicinal ChemistryKunming Institute of BotanyChinese Academy of Sciences Kunming 650201 Yunnan China
| | - Ji‐Kai Liu
- School of Pharmaceutical SciencesSouth-Central University for Nationalities Wuhan 430074 Hubei China
| | - Ying Zeng
- State Key Laboratory of Phytochemistry and Plant Resources in West ChinaYunnan Key Laboratory of Natural Medicinal ChemistryKunming Institute of BotanyChinese Academy of Sciences Kunming 650201 Yunnan China
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10
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Feng K, Yang Y, Xu Y, Zhang Y, Feng T, Huang S, Liu J, Zeng Y. A Hydrolase‐Catalyzed Cyclization Forms the Fused Bicyclic β‐Lactone in Vibralactone. Angew Chem Int Ed Engl 2020; 59:7209-7213. [PMID: 32050043 DOI: 10.1002/anie.202000710] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 02/11/2020] [Indexed: 12/21/2022]
Affiliation(s)
- Ke‐Na Feng
- State Key Laboratory of Phytochemistry and Plant Resources in West China Yunnan Key Laboratory of Natural Medicinal Chemistry Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 Yunnan China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Yan‐Long Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China Yunnan Key Laboratory of Natural Medicinal Chemistry Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 Yunnan China
| | - Yu‐Xing Xu
- State Key Laboratory of Phytochemistry and Plant Resources in West China Yunnan Key Laboratory of Natural Medicinal Chemistry Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 Yunnan China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Yue Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China Yunnan Key Laboratory of Natural Medicinal Chemistry Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 Yunnan China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Tao Feng
- School of Pharmaceutical Sciences South-Central University for Nationalities Wuhan 430074 Hubei China
| | - Sheng‐Xiong Huang
- State Key Laboratory of Phytochemistry and Plant Resources in West China Yunnan Key Laboratory of Natural Medicinal Chemistry Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 Yunnan China
| | - Ji‐Kai Liu
- School of Pharmaceutical Sciences South-Central University for Nationalities Wuhan 430074 Hubei China
| | - Ying Zeng
- State Key Laboratory of Phytochemistry and Plant Resources in West China Yunnan Key Laboratory of Natural Medicinal Chemistry Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 Yunnan China
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11
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Affiliation(s)
- Susannah C. Coote
- Department of Chemistry; Lancaster University; Bailrigg Lancaster LA1 4YB UK
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12
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Williams JD, Otake Y, Coussanes G, Saridakis I, Maulide N, Kappe CO. Towards a Scalable Synthesis of 2-Oxabicyclo[2.2.0]hex-5-en-3-one Using Flow Photochemistry. CHEMPHOTOCHEM 2019; 3:229-232. [PMID: 31423462 PMCID: PMC6686974 DOI: 10.1002/cptc.201900017] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 01/31/2019] [Indexed: 12/12/2022]
Abstract
Cyclobutene lactones hold great potential as synthetic building blocks, yet their preparation by photochemical rearrangement in batch can often be a bottleneck in synthetic studies. We report the use of flow photochemistry as a tool to enable a higher-throughput approach to the synthesis of 2-oxabicyclo[2.2.0]hex-5-en-3-one, which reduces reaction times from 24 h to 10 min. Accordingly, a significantly improved throughput of 144 mg/h (vs 14-21 mg/h in batch) was achieved. Scale-out experiments showed problematic reactor fouling and steps were taken to explore and minimize this effect.
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Affiliation(s)
- Jason D. Williams
- Center for Continuous Flow Synthesis and Processing (CCFLOW)Research Center Pharmaceutical Engineering GmbH (RCPE)Inffeldgasse 138010GrazAustria
- Institute of ChemistryUniversity of Graz NAWI GrazHeinrichstrasse 288010 GrazAustria
| | - Yuma Otake
- Institute of ChemistryUniversity of Graz NAWI GrazHeinrichstrasse 288010 GrazAustria
- Present address: Laboratory for Chemistry and Life ScienceInstitute of Innovative Research Tokyo Institute of Technology 4259 Nagatsuta-cho, Midori-kuYokohama226-8503Japan
| | - Guilhem Coussanes
- Institute of Organic ChemistryUniversity of ViennaWähringer Strasse 381090ViennaAustria
| | - Iakovos Saridakis
- Institute of Organic ChemistryUniversity of ViennaWähringer Strasse 381090ViennaAustria
| | - Nuno Maulide
- Institute of Organic ChemistryUniversity of ViennaWähringer Strasse 381090ViennaAustria
| | - C. Oliver Kappe
- Center for Continuous Flow Synthesis and Processing (CCFLOW)Research Center Pharmaceutical Engineering GmbH (RCPE)Inffeldgasse 138010GrazAustria
- Institute of ChemistryUniversity of Graz NAWI GrazHeinrichstrasse 288010 GrazAustria
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