1
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Guth FM, Lindner F, Rydzek S, Peil A, Friedrich S, Hauer B, Hahn F. Rieske Oxygenase-Catalyzed Oxidative Late-Stage Functionalization during Complex Antifungal Polyketide Biosynthesis. ACS Chem Biol 2023; 18:2450-2456. [PMID: 37948749 DOI: 10.1021/acschembio.3c00498] [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: 11/12/2023]
Abstract
Rieske oxygenases (ROs) from natural product biosynthetic pathways are a poorly studied group of enzymes with significant potential as oxidative functionalization biocatalysts. A study on the ROs JerL, JerP, and AmbP from the biosynthetic pathways of jerangolid A and ambruticin VS-3 is described. Their activity was successfully reconstituted using whole-cell bioconversion systems coexpressing the ROs and their respective natural flavin-dependent reductase (FDR) partners. Feeding authentic biosynthetic intermediates and synthetic surrogates to these strains confirmed the involvement of the ROs in hydroxymethylpyrone and dihydropyran formation and revealed crucial information about the RO's substrate specificity. The pronounced dependence of JerL and JerP on the presence of a methylenolether allowed the precise temporal assignment of RO catalysis to the ultimate steps of jerangolid biosynthesis. JerP and AmbP stand out among the biosynthetic ROs studied so far for their ability to catalyze clean tetrahydropyran desaturation without further functionalizing the formed electron-rich double bonds. This work highlights the remarkable ability of ROs to highly selectively oxidize complex molecular scaffolds.
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Affiliation(s)
- Florian M Guth
- Professur für Organische Chemie (Lebensmittelchemie), Fakultät für Biologie, Chemie und Geowissenschaften, Department of Chemistry, Universität Bayreuth, 95447 Bayreuth, Germany
| | - Frederick Lindner
- Professur für Organische Chemie (Lebensmittelchemie), Fakultät für Biologie, Chemie und Geowissenschaften, Department of Chemistry, Universität Bayreuth, 95447 Bayreuth, Germany
| | - Simon Rydzek
- Professur für Organische Chemie (Lebensmittelchemie), Fakultät für Biologie, Chemie und Geowissenschaften, Department of Chemistry, Universität Bayreuth, 95447 Bayreuth, Germany
| | - Andreas Peil
- Professur für Organische Chemie (Lebensmittelchemie), Fakultät für Biologie, Chemie und Geowissenschaften, Department of Chemistry, Universität Bayreuth, 95447 Bayreuth, Germany
| | - Steffen Friedrich
- Professur für Organische Chemie (Lebensmittelchemie), Fakultät für Biologie, Chemie und Geowissenschaften, Department of Chemistry, Universität Bayreuth, 95447 Bayreuth, Germany
| | - Bernhard Hauer
- Institute of Technical Biochemistry, Universität Stuttgart, Allmandring 31, 70569 Stuttgart, Germany
| | - Frank Hahn
- Professur für Organische Chemie (Lebensmittelchemie), Fakultät für Biologie, Chemie und Geowissenschaften, Department of Chemistry, Universität Bayreuth, 95447 Bayreuth, Germany
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2
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Banwell MG, White LV, Ye SY. Formal Total Syntheses of (+)- and (-)-Aspidophytine from a Common, Homochiral Precursor. J Org Chem 2022; 87:14407-14421. [PMID: 36194193 DOI: 10.1021/acs.joc.2c01864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A formal total synthesis of (-)-aspidophytine (2), a key substructure associated with the heterodimeric indole alkaloid haplophytine (1) and itself a natural product, has been established by employing the homochiral and enzymatically derived cis-1,2-dihydrocatechol 8 as a starting material. Specifically, compound 8 has been converted into the pentacyclic product 26, an advanced intermediate associated with a previously reported synthesis of aspidophytine (2). Simple modifications to the reaction sequence have also allowed for the identification of a synthetic pathway leading from dihydrocatechol 8 to (+)-aspidophytine (ent-2).
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Affiliation(s)
- Martin G Banwell
- Guangdong Key Laboratory for Research and the Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang, Guangdong 524023, China.,Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou, Guangdong 510632, China
| | - Lorenzo V White
- Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou, Guangdong 510632, China
| | - Sebastian Young Ye
- Research School of Chemistry, The Australian National University Canberra, ACT 2601, Australia
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3
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Habaz L, Bedard K, Smith M, Du L, Kornienko A, Hudlicky T. Design and Synthesis of C-1 Methoxycarbonyl Derivative of Narciclasine and Its Biological Activity. Molecules 2022; 27:molecules27123809. [PMID: 35744934 PMCID: PMC9230822 DOI: 10.3390/molecules27123809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/08/2022] [Accepted: 06/09/2022] [Indexed: 02/04/2023] Open
Abstract
A 15-step chemoenzymatic total synthesis of C-1 methoxycarbonyl narciclasine (10) was accomplished. The synthesis began with the toluene dioxygenase-mediated dihydroxylation of ortho-dibromobenzene to provide the corresponding cis-dihydrodiol (12) as a single enantiomer. Further key steps included a nitroso Diels–Alder reaction and an intramolecular Heck cyclization. The C-1 homolog 10 was tested and evaluated for antiproliferative activity against natural narciclasine (1) as the positive control. Experimental and spectral data are reported for all novel compounds.
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Affiliation(s)
- Lihi Habaz
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON L2S 3A1, Canada;
- Correspondence: (L.H.); (A.K.)
| | - Korey Bedard
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON L2S 3A1, Canada;
| | - Mitchell Smith
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX 78666, USA; (M.S.); (L.D.)
| | - Liqin Du
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX 78666, USA; (M.S.); (L.D.)
| | - Alexander Kornienko
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX 78666, USA; (M.S.); (L.D.)
- Correspondence: (L.H.); (A.K.)
| | - Tomas Hudlicky
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON L2S 3A1, Canada;
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4
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Ticli V, Zhao Z, Du L, Kornienko A, Hudlicky T. Synthesis and biological evaluation of 10-benzyloxy-Narciclasine. Tetrahedron 2021; 101. [PMID: 35058668 DOI: 10.1016/j.tet.2021.132505] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A chemoenzymatic convergent synthesis of 10-benzyloxy narciclasine from bromobenzene was accomplished in 16 steps. The key transformations included toluene dioxygenase-mediated hydroxylation, nitroso Diels-Alder reaction and intramolecular Heck cyclization. The unnatural derivative of narciclasine was subjected to biological evaluation and its activity was compared to other C-10 and C-7 compounds prepared previously.
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Affiliation(s)
- Vincenzo Ticli
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON, L2R 3A1, Canada
| | - Zhenze Zhao
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX, 78666, USA
| | - Liqin Du
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX, 78666, USA
| | - Alexander Kornienko
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, TX, 78666, USA
| | - Tomas Hudlicky
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON, L2R 3A1, Canada
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5
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Ye S, Banwell MG. Chemoenzymatic and Enantiomeric Switching Regimes Enabling the Synthesis of Homochiral Cyclohexa-2,5-dienones Incorporating All-Carbon Quaternary Centers. J Org Chem 2021; 86:15403-15412. [PMID: 34617772 DOI: 10.1021/acs.joc.1c01931] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The enantiomerically pure, bromobenzene-derived metabolite 5 has been transformed into enone 20 using a reaction sequence involving Suzuki-Miyaura cross-coupling and Eschenmoser-Claisen rearrangement processes. Treatment of compound 20 with lithium hydroxide results in an acetonide fragmentation reaction that delivers the 4,4-disubstituted cyclohexa-2,5-dienone 21, reductive de-oxygenation of which leads to congener 22. A closely related sequence of reactions can be used to convert the same homochiral starting material 5 into compound ent-22.
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Affiliation(s)
- Sebastian Ye
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Martin G Banwell
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.,Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou 510632, China
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Zhang Z, Zhou YJ, Liang XW. Total synthesis of natural products using photocycloaddition reactions of arenes. Org Biomol Chem 2021; 18:5558-5566. [PMID: 32677654 DOI: 10.1039/d0ob01204a] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The photocycloaddition reaction of benzene with alkenes has become a significant approach for organic chemists and thus has been frequently utilized as a key step in the total synthesis of natural products. In this mini-review, the recent developments in [4 + 2] and [2 + 2] photocycloaddition reactions will be emphasized in constructing core scaffolds of complex natural products. By combining them together, we aim to demonstrate the utility and reinstate the importance of this methodology.
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Affiliation(s)
| | - Ying-Jun Zhou
- Xiang-Ya School of Pharmaceutical Sciences, Central South University, Changsha 410013, China.
| | - Xiao-Wei Liang
- Xiang-Ya School of Pharmaceutical Sciences, Central South University, Changsha 410013, China.
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Hu N, White LV, Lan P, Banwell MG. The Chemical Synthesis of the Crinine and Haemanthamine Alkaloids: Biologically Active and Enantiomerically-Related Systems that Serve as Vehicles for Showcasing New Methodologies for Molecular Assembly. Molecules 2021; 26:molecules26030765. [PMID: 33540725 PMCID: PMC7867252 DOI: 10.3390/molecules26030765] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/14/2021] [Accepted: 01/15/2021] [Indexed: 11/16/2022] Open
Abstract
The title alkaloids, often referred to collectively as crinines, are a prominent group of structurally distinct natural products with additional members being reported on a regular basis. As such, and because of their often notable biological properties, they have attracted attention as synthetic targets since the mid-1950s. Such efforts continue unabated and more recent studies on these alkaloids have focused on using them as vehicles for showcasing the utility of new synthetic methods. This review provides a comprehensive survey of the nearly seventy-year history of these synthetic endeavors.
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8
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Stewart SG, Harfoot GJ, McRae KJ, Teng Y, Yu LJ, Chen B, Cammi R, Coote ML, Banwell MG, Willis AC. High-Pressure-Promoted and Facially Selective Diels–Alder Reactions of Enzymatically Derived cis-1,2-Dihydrocatechols and Their Acetonide Derivatives: Enantiodivergent Routes to Homochiral and Polyfunctionalized Bicyclo[2.2.2]octenes. J Org Chem 2020; 85:13080-13095. [DOI: 10.1021/acs.joc.0c01767] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Scott G. Stewart
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
| | - Gwion J. Harfoot
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
| | - Kenneth J. McRae
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
| | - Yinglai Teng
- Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou 510632, China
| | - Li-Juan Yu
- Research School of Chemistry, Institute of Advanced Studies and ARC Centre of Excellence for Electromaterials Science, Research School of Chemistry, The Australian National University, Canberra, ACT 2601 Australia
| | - Bo Chen
- Donostia International Physics Center, Paseo Manuel de Lardizabal, 4, 20018 Donostia-San Sebastian, Spain
- IKERBASQUE, Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain
| | - Roberto Cammi
- Department of Chemical Science, Life Science and Environmental Sustainability, University of Parma, I-43100 Parma, Italy
| | - Michelle L. Coote
- Research School of Chemistry, Institute of Advanced Studies and ARC Centre of Excellence for Electromaterials Science, Research School of Chemistry, The Australian National University, Canberra, ACT 2601 Australia
| | - Martin G. Banwell
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
- Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou 510632, China
| | - Anthony C. Willis
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
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9
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Huck CJ, Sarlah D. Shaping Molecular Landscapes: Recent Advances, Opportunities, and Challenges in Dearomatization. Chem 2020; 6:1589-1603. [PMID: 32715154 PMCID: PMC7380651 DOI: 10.1016/j.chempr.2020.06.015] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Dearomatization is a fundamental chemical transformation, and it underlies some of the most efficient tactics for generating three-dimensional complexity from basic two-dimensional precursors. The dearomative toolbox, once restricted to only a handful of reactions, has begun to grow more sophisticated as novel methods are added, introducing more functionality under milder conditions and with more control over chemo-, regio-, and stereoselectivity than ever before. Over the past two decades, major developments in dearomative processes have bolstered significant total-synthesis endeavors and greatly expanded the scope and complexity of chemical building blocks accessible from feedstock arenes. In this Perspective, we highlight some of the recent advances and key challenges that remain in this vibrant area of organic chemistry.
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Affiliation(s)
- Christopher J. Huck
- Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Champaign, IL 61801, USA
| | - David Sarlah
- Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Champaign, IL 61801, USA
- Dipartimento di Chimica Organica, Universita di Pavia, Via Taramelli 12, 27100 Pavia, Italy
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10
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Siddiqi Z, Wertjes WC, Sarlah D. Chemical Equivalent of Arene Monooxygenases: Dearomative Synthesis of Arene Oxides and Oxepines. J Am Chem Soc 2020; 142:10125-10131. [PMID: 32383862 DOI: 10.1021/jacs.0c02724] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Direct epoxidation of aromatic nuclei by cytochrome P450 monooxygenases is one of the major metabolic pathways of arenes in eukaryotes. The resulting arene oxides serve as versatile precursors to phenols, oxepines, or trans-dihydrodiol-based metabolites. Although such compounds have an important biological and chemical relevance, the lack of methods for their production has hampered access to their utility. Herein, we report a general arenophile-based strategy for the dearomative synthesis of arene oxides. The mildness of this method permits access to sensitive monocyclic arene oxides without any noticeable decomposition to phenols. Moreover, this method enables direct conversion of polycyclic arenes and heteroarenes into the corresponding oxepines. Finally, these studies provided direct connection between simple aromatic precursors and complex small organic molecules via arene oxides and oxepines.
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Affiliation(s)
- Zohaib Siddiqi
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - William C Wertjes
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - David Sarlah
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
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11
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Blüchel CG, Mikusek J, Willis AC, Gardiner MG, Banwell MG. Syntheses of Dimethyl (1 S,2 R)-3-Bromocyclohexa-3,5-diene-1,2-dicarboxylate and Its Enantiomer. J Org Chem 2020; 85:2303-2311. [PMID: 31873013 DOI: 10.1021/acs.joc.9b03014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The title compounds, (-)-2 and (+)-2, representing potentially valuable building blocks for chemical synthesis, have each been prepared from cyclopentanone in eight steps. The pivotal one involves a resolution, through the quinine- or quinidine-promoted methanolysis of the cyclic anhydride (±)-10, leading to chromatographically separable pairs of enantiomerically pure forms of regioisomeric methyl half esters.
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Affiliation(s)
- Christian G Blüchel
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , Australian Capital Territory 2601 , Australia
| | - Jiri Mikusek
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , Australian Capital Territory 2601 , Australia
| | - Anthony C Willis
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , Australian Capital Territory 2601 , Australia
| | - Michael G Gardiner
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , Australian Capital Territory 2601 , Australia
| | - Martin G Banwell
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , Australian Capital Territory 2601 , Australia
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