1
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Chan M, Hafeman NJ, Fulton TJ, Stoltz BM. Systematic Route to Construct the 5-5-6 Tricyclic Core of Furanobutenolide-Derived Cembranoids and Norcembranoids. Org Lett 2024; 26:6320-6323. [PMID: 39046190 DOI: 10.1021/acs.orglett.4c01820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
Herein, we present a highly efficient method for constructing the intricate 5-5-6 fused ring system commonly found in the polycyclic furanobutenolide-derived cembranoid and norcembranoid natural product family with remarkable diastereoselectivity, utilizing an intramolecular Diels-Alder reaction as the cornerstone. Notably, employing a propargyl ether tether as the dienophile yields significant enhancements in the transformation process compared to its propargyl ester counterpart, as demonstrated in our previous total synthesis of havellockate. This advancement holds promising implications for future investigations, offering a streamlined pathway for rapidly assembling the tricyclic core characteristic of this diverse family of natural products.
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Affiliation(s)
- Melinda Chan
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, MC 101-20, Pasadena, California 91125, United States
| | - Nicholas J Hafeman
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, MC 101-20, Pasadena, California 91125, United States
| | - Tyler J Fulton
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, MC 101-20, Pasadena, California 91125, United States
| | - Brian M Stoltz
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, MC 101-20, Pasadena, California 91125, United States
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2
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Sahoo SS, Kataria P, Kontham R. Concise and collective total syntheses of 2,4-disubstituted furan-derived natural products from hydroxyoxetanyl ketones. Org Biomol Chem 2024; 22:1475-1483. [PMID: 38284832 DOI: 10.1039/d3ob01924a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
The furan moiety, prevalent in bioactive natural products and essential drugs, presents intriguing structural features that have spurred our exploration into streamlined chemical synthesis routes for related natural products. In this study, we demonstrate the concise total synthesis of eight 2,4-disubstituted furan-derived natural products (including methylfuroic acid, rabdoketones A and B, paleofurans A and B, tournefolin C, and shikonofurans A and B). Our methodology revolves around the utilization of hydroxyoxetanyl ketones as pivotal intermediates. The approach encompasses transformations such as selective organo-catalyzed cross-ketol addition, synthesis of hydroxymethyl-tethered furans through Bi(OTf)3 catalyzed dehydrative cycloisomerization of α-hydroxyoxetanyl ketones, and a hydrogen atom transfer (HAT)-mediated oxidation of primary alcohols into the corresponding acids. This comprehensive synthetic strategy highlights the versatility of hydroxyoxetanyl ketones as invaluable building blocks in the synthesis of furan-containing natural products.
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Affiliation(s)
- Shubhranshu Shekhar Sahoo
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune-411008, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Priyanka Kataria
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune-411008, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Ravindar Kontham
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune-411008, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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3
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Gross B, Han SJ, Virgil SC, Stoltz BM. A Convergent Total Synthesis of (+)-Ineleganolide. J Am Chem Soc 2023; 145:7763-7767. [PMID: 36989438 PMCID: PMC10544024 DOI: 10.1021/jacs.3c02142] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Indexed: 03/31/2023]
Abstract
We report the total synthesis of the furanobutenolide-derived diterpenoid (+)-ineleganolide. The synthetic approach relies on a convergent strategy based on the coupling of two enantioenriched fragments, which are derived from (-)-linalool and (+)-norcarvone, respectively. A high-yielding, one-step Michael addition and aldol cascade furnishes a pentacyclic framework as a single diastereomer, thereby overcoming previous challenges in controlling stereochemistry. The endgame features an O2-facilitated C-H oxidation and a samarium diiodide-induced semipinacol rearrangement to furnish the highly rigid central seven-membered ring.
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Affiliation(s)
- Benjamin
M. Gross
- The
Warren and Katharine Schlinger Laboratory for Chemistry and Chemical
Engineering, California Institute of Technology, MC-101-20, Pasadena, California 91125, United States
| | - Seo-Jung Han
- The
Warren and Katharine Schlinger Laboratory for Chemistry and Chemical
Engineering, California Institute of Technology, MC-101-20, Pasadena, California 91125, United States
- Chemical
and Biological Integrative Research Center, KIST and Division of Bio-Medical
Science & Technology, KIST-School, UST, Seoul, 02792, Republic of Korea
| | - Scott C. Virgil
- The
Warren and Katharine Schlinger Laboratory for Chemistry and Chemical
Engineering, California Institute of Technology, MC-101-20, Pasadena, California 91125, United States
| | - Brian M. Stoltz
- The
Warren and Katharine Schlinger Laboratory for Chemistry and Chemical
Engineering, California Institute of Technology, MC-101-20, Pasadena, California 91125, United States
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4
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Oger S, Duchemin N, Bendiab YM, Birlirakis N, Skiredj A, Rharrabti S, Jullian JC, Poupon E, Smietana M, Arseniyadis S, Evanno L. Expanding the 'aplysinospin cascade' through DNA-templated [2+2] photocycloaddition. Chem Commun (Camb) 2023; 59:4221-4224. [PMID: 36939749 DOI: 10.1039/d3cc00673e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Abstract
Inspired by the unique ability of nucleic acids to template chemical transformations that are otherwise impossible in solution, we embarked on the generalisation of our DNA-templated [2+2] photo-induced homo- and heterodimerization of aplysinopsins. Our process ensures a straightforward access to cyclobutane containing natural products and analogues thereof. Most importantly, this conceptual biomimetic achievement presents interesting arguments to build a biosynthetic scenario.
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Affiliation(s)
- Samuel Oger
- Université Paris-Saclay, CNRS, BioCIS, 17, Avenue des Sciences, 91400, Orsay, France.
| | - Nicolas Duchemin
- Queen Mary University of London, Department of Chemistry, Mile End Road, E1 4NS, London, UK.
| | - Yara Mayssa Bendiab
- Université Paris-Saclay, CNRS, BioCIS, 17, Avenue des Sciences, 91400, Orsay, France.
| | - Nicolas Birlirakis
- Département de Chimie, Ecole Normale Supérieure, PSL Research University, CNRS, Laboratoire des Biomolecules (LBM), 24 rue Lhomond, 75005, Paris, France
| | - Adam Skiredj
- Université Paris-Saclay, CNRS, BioCIS, 17, Avenue des Sciences, 91400, Orsay, France.
| | - Somia Rharrabti
- Université Paris-Saclay, CNRS, BioCIS, 17, Avenue des Sciences, 91400, Orsay, France.
| | | | - Erwan Poupon
- Université Paris-Saclay, CNRS, BioCIS, 17, Avenue des Sciences, 91400, Orsay, France.
| | - Michael Smietana
- Institut des Biomolécules Max Mousseron, Université de Montpellier, CNRS, ENSCM, 1919 Route de Mende, 34095, Montpellier, France.
| | - Stellios Arseniyadis
- Queen Mary University of London, Department of Chemistry, Mile End Road, E1 4NS, London, UK.
| | - Laurent Evanno
- Université Paris-Saclay, CNRS, BioCIS, 17, Avenue des Sciences, 91400, Orsay, France.
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5
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Wu J, Li SJ, Jiang L, Ma XC, Lan Y, Shen L. UV light-driven late-stage skeletal reorganization to diverse limonoid frameworks: A proof of concept for photobiosynthesis. SCIENCE ADVANCES 2023; 9:eade2981. [PMID: 36706176 PMCID: PMC9882982 DOI: 10.1126/sciadv.ade2981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 12/29/2022] [Indexed: 06/18/2023]
Abstract
Late-stage skeletal reorganization (LSSR) is a type of fascinating organic transformation processes in natural product total synthesis. However, few facile and effective LSSR methodologies have hitherto been developed. Here, LSSR of limonoid natural products via photochemical cascades is first reported. Starting from xyloelves A and B, nine distinct limonoid products with five unprecedented scaffolds are generated. The photocascade pathways of these natural products and mechanistic rationale via intramolecular triplet energy transfer are revealed by quantum mechanical calculations. Most notably, ultraviolet light-driven transannular and stereoselective C → C 1,4-acyl migration is first found as a photochemical approach, particularly for LSSR of natural products. This approach holds promise for designing LSSR strategies to access bioactive cage-like molecules. Besides that, our findings provide a clear proof of concept for natural product photobiosynthesis. Xyloelf A, substantially ameliorating concanavalin A-induced liver injury in mice, could be used as a unique molecular template for hepatoprotective drug discovery.
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Affiliation(s)
- Jun Wu
- Guangdong Key Laboratory of Natural Medicine Research and Development, College of Pharmacy, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan 523808, China
| | - Shi-Jun Li
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Long Jiang
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
| | - Xiao-Chi Ma
- Pharmaceutical Research Center, Second Affiliated Hospital, Dalian Medical University, Dalian 116044, China
| | - Yu Lan
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, China
| | - Li Shen
- Guangdong Key Laboratory of Natural Medicine Research and Development, College of Pharmacy, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan 523808, China
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6
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Hoff O, Kratena N, Aynetdinova D, Christensen KE, Donohoe TJ. A Vicinal Diol Approach for the Total Synthesis of Molestin E, ent-Sinulacembranolide A and ent-Sinumaximol A. Chemistry 2022; 28:e202202464. [PMID: 35946550 PMCID: PMC9826425 DOI: 10.1002/chem.202202464] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Indexed: 01/11/2023]
Abstract
In this work an approach for the synthesis of furanocembranoid natural products containing the C-7,8-diol moiety is disclosed. This culminated in the first total synthesis of the natural product molestin E, together with ent-sinulacembranolide A and ent-sinumaximol A as well as a thorough exploration of their chemistry. Late-stage ring-closure of the C-7,8-diols to the corresponding epoxides was also demonstrated. Key features of this synthetic strategy include a stereoselective Baylis-Hillman reaction, ring-closing metathesis and Shiina macrolactonisation. Chiral-pool materials were deployed to ensure the desired absolute stereochemistry which was confirmed by late-stage single crystal X-ray diffraction.
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Affiliation(s)
- Oskar Hoff
- Department of ChemistryUniversity of OxfordChemistry Research LaboratoryMansfield RoadOxfordOX1 3TAUK
| | - Nicolas Kratena
- Department of ChemistryUniversity of OxfordChemistry Research LaboratoryMansfield RoadOxfordOX1 3TAUK
| | - Daniya Aynetdinova
- Department of ChemistryUniversity of OxfordChemistry Research LaboratoryMansfield RoadOxfordOX1 3TAUK
| | - Kirsten E. Christensen
- Department of ChemistryUniversity of OxfordChemistry Research LaboratoryMansfield RoadOxfordOX1 3TAUK
| | - Timothy J. Donohoe
- Department of ChemistryUniversity of OxfordChemistry Research LaboratoryMansfield RoadOxfordOX1 3TAUK
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7
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Hafeman NJ, Chan M, Fulton TJ, Alexy EJ, Loskot SA, Virgil SC, Stoltz BM. Asymmetric Total Synthesis of Havellockate. J Am Chem Soc 2022; 144:20232-20236. [PMID: 36287147 PMCID: PMC9997676 DOI: 10.1021/jacs.2c09583] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first total synthesis of the furanobutenolide-derived cembranoid diterpenoid havellockate is disclosed. Our convergent strategy employs a Julia-Kocienski olefination to join two enantioenriched fragments to produce a diene that is subsequently used in a propiolic acid esterification/Diels-Alder cascade. This sequence generates the fused carbocyclic core of the natural product in short order. A challenging Zn-mediated Barbier allylation then forges the final C-C bond and also establishes two vicinal stereogenic centers. Finally, a Cu-catalyzed aerobic oxidation facilitates the formation of the β-hydroxybutanolide to complete the total synthesis.
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Affiliation(s)
| | | | | | | | | | | | - Brian M. Stoltz
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, MC 101-20, Pasadena, California, 91125, United States
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8
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Bouthillette LM, Aniebok V, Colosimo DA, Brumley D, MacMillan JB. Nonenzymatic Reactions in Natural Product Formation. Chem Rev 2022; 122:14815-14841. [PMID: 36006409 DOI: 10.1021/acs.chemrev.2c00306] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Biosynthetic mechanisms of natural products primarily depend on systems of protein catalysts. However, within the field of biosynthesis, there are cases in which the inherent chemical reactivity of metabolic intermediates and substrates evades the involvement of enzymes. These reactions are difficult to characterize based on their reactivity and occlusion within the milieu of the cellular environment. As we continue to build a strong foundation for how microbes and higher organisms produce natural products, therein lies a need for understanding how protein independent or nonenzymatic biosynthetic steps can occur. We have classified such reactions into four categories: intramolecular, multicomponent, tailoring, and light-induced reactions. Intramolecular reactions is one of the most well studied in the context of biomimetic synthesis, consisting of cyclizations and cycloadditions due to the innate reactivity of the intermediates. There are two subclasses that make up multicomponent reactions, one being homologous multicomponent reactions which results in dimeric and pseudodimeric natural products, and the other being heterologous multicomponent reactions, where two or more precursors from independent biosynthetic pathways undergo a variety of reactions to produce the mature natural product. The third type of reaction discussed are tailoring reactions, where postmodifications occur on the natural products after the biosynthetic machinery is completed. The last category consists of light-induced reactions involving ecologically relevant UV light rather than high intensity UV irradiation that is traditionally used in synthetic chemistry. This review will cover recent nonenzymatic biosynthetic mechanisms and include sources for those reviewed previously.
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Affiliation(s)
- Leah M Bouthillette
- Deparment of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, United States
| | - Victor Aniebok
- Deparment of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, United States
| | - Dominic A Colosimo
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390 United States
| | - David Brumley
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390 United States
| | - John B MacMillan
- Deparment of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, United States.,Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390 United States
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9
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Hetzler BE, Trauner D, Lawrence AL. Natural product anticipation through synthesis. Nat Rev Chem 2022; 6:170-181. [PMID: 36747591 PMCID: PMC9899497 DOI: 10.1038/s41570-021-00345-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/13/2021] [Indexed: 02/08/2023]
Abstract
Natural product synthesis remains one of the most vibrant and intellectually rewarding areas of chemistry, although the justifications for pursuing it have evolved over time. In the early years, the emphasis lay on structure elucidation and confirmation through synthesis, as exemplified by celebrated studies on cocaine, morphine, strychnine and chlorophyll. This was followed by a phase where the sheer demonstration that highly complex molecules could be recreated in the laboratory in a rational manner was enough to justify the economic expense and intellectual agonies of a synthesis. Since then, syntheses of natural products have served as platforms for the demonstration of elegant strategies, for inventing new methodology 'on the fly' or to demonstrate the usefulness and scope of methods established with simpler molecules. We now add another aspect that we find fascinating, viz. 'natural product anticipation'. In this Review, we survey cases where the synthesis of a compound in the laboratory has preceded its isolation from nature. The focus of our Review lies on examples where this anticipation of a natural product has triggered a successful search or where synthesis and isolation have occurred independently. Finally, we highlight cases where a potential natural product structure has been suggested as a result of synthetic endeavours but not yet confirmed by isolation, inviting further collaborations between synthetic and natural product chemists.
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Affiliation(s)
| | - Dirk Trauner
- Department of Chemistry, New York University, New York, NY, USA
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10
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Abstract
The first total synthesis of (±)-jujuyane, a cyclooctanoid natural product, was accomplished from a (5 + 3) dimerization product of oxidopyrylium ylide that forms the cyclooctanoid core structure along with inherited stereochemical bias. Selective functional group modifications of the highly oxygenated dimeric structure, followed by the tactical functional group manipulation around the eight-membered carbocyclic core, enabled the total synthesis of (±)-jujuyane, which will serve a guide for future applications of oxidopyrylium dimers to the natural product total synthesis.
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Affiliation(s)
- Sanghyeon Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | | | | | - Jiheon Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Hee-Yoon Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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11
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Scesa PD, West LM, Roche SP. Role of Macrocyclic Conformational Steering in a Kinetic Route toward Bielschowskysin. J Am Chem Soc 2021; 143:7566-7577. [PMID: 33945689 DOI: 10.1021/jacs.1c03336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Macrocyclic furanobutenolide-derived cembranoids (FBCs) are the biosynthetic precursors to a wide variety of highly congested and oxygenated polycyclic (nor)diterpenes (e.g. plumarellide, verrillin, and bielschowskysin). These architecturally complex metabolites are thought to originate from site-selective oxidation of the macrocycle backbone and a series of intricate transannular reactions. Yet the development of a common biomimetic route has been hampered by a lack of synthetic methods for the pivotal furan dearomatization in a regio- and stereoselective manner. To address these shortcomings, a concise strategy of epoxidation followed by a kinetically controlled furan dearomatization is reported. The surprising switch of facial α:β-discrimination observed in the epoxidation of the most strained E-acerosolide versus E-deoxypukalide and E-bipinnatin J derived macrocycles has been rationalized by the variation of the 3D conformational landscape between macrocyclic scaffolds. A careful conformational analysis of these macrocycles by VT-NMR and NOESY experiments at low temperature was supported by DFT calculations to characterize these equilibrating macrocyclic conformers. The shift in conformational topology associated with a swing of the butenolide ring in E-deoxypukalide is in general agreement with the reversal of β-selectivity observed in the epoxidation. We also describe the downstream functionalization of FBC-macrocycles and how the C-7 epoxide configuration is retentively translated to the C-3 stereogenicity in dearomatized products under kinetic control to secure the requisite 3S,7S,8S configurations for the bielschowskysin synthesis. Unlike previously speculated, our results suggest that the most strained FBC-macrocycles bearing a E-(Δ7,8)-alkene moiety may stand as the true biosynthetic precursors to bielschowskysin and several other polycyclic natural products of this class.
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Affiliation(s)
- Paul D Scesa
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431, United States
| | - Lyndon M West
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431, United States
| | - Stéphane P Roche
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431, United States
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12
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Tantillo DJ. Interrogating chemical mechanisms in natural products biosynthesis using quantum chemical calculations. WIRES COMPUTATIONAL MOLECULAR SCIENCE 2020. [DOI: 10.1002/wcms.1453] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dean J. Tantillo
- Department of Chemistry University of California–Davis Davis California
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13
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Palframan MJ, Pattenden G. Biosynthetic Interrelationships within Polycyclic Cembranoids Isolated from Corals: Conjecture, Biomimetic Synthesis and Reality. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901438] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Matthew J. Palframan
- School of Chemistry; The University of Nottingham; University Park Nottingham NG7 2RD UK
| | - Gerald Pattenden
- School of Chemistry; The University of Nottingham; University Park Nottingham NG7 2RD UK
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14
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Hong B, Liu W, Wang J, Wu J, Kadonaga Y, Cai PJ, Lou HX, Yu ZX, Li H, Lei X. Photoinduced Skeletal Rearrangements Reveal Radical-Mediated Synthesis of Terpenoids. Chem 2019. [DOI: 10.1016/j.chempr.2019.04.023] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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15
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Tong B, Maimone TJ. Enlightening Terpene Synthesis. Chem 2019. [DOI: 10.1016/j.chempr.2019.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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Deng M, Zhang X, Li Z, Chen H, Zang S, Liang G. Rapid Construction of the Common [5-5-6] Tricyclic Ring Skeleton in Polycyclic Cembranoids and Norcembranoids via Intramolecular 1,3-Dipolar Cycloaddition. Org Lett 2019; 21:1493-1496. [PMID: 30789271 DOI: 10.1021/acs.orglett.9b00285] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A synthetically challenging bowl-shaped [5-5-6] tricyclic framework commonly seen in many polycyclic cembranoids and norcembranoids was strategically established in a convenient six-step sequence featuring an intramolecular 1, 3-dipolar cycloaddition reaction. Synthetic manipulations of such a valuable intermediate were explored for future applications.
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Affiliation(s)
- Meng Deng
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Xiao Zhang
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Zining Li
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Hongbin Chen
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Shaoli Zang
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Guangxin Liang
- State Key Laboratory of Elemento-organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China
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17
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Tang B, Paton RS. Biosynthesis of Providencin: Understanding Photochemical Cyclobutane Formation with Density Functional Theory. Org Lett 2019; 21:1243-1247. [DOI: 10.1021/acs.orglett.8b03838] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bencan Tang
- Department of Chemical and Environment Engineering, Science and Engineering Building, The University of Nottingham Ningbo China, 199 Taikang East Road, Ningbo 315100, China
| | - Robert S. Paton
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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18
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Matmin J, Jalani MA, Osman H, Omar Q, Ab'lah N, Elong K, Kasim MF. Photochemical Synthesis of Nanosheet Tin Di/Sulfide with Sunlight Response on Water Pollutant Degradation. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E264. [PMID: 30769911 PMCID: PMC6410158 DOI: 10.3390/nano9020264] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 02/06/2019] [Accepted: 02/07/2019] [Indexed: 12/16/2022]
Abstract
The photochemical synthesis of two-dimensional (2D) nanostructured from semiconductor materials is unique and challenging. We report, for the first time, the photochemical synthesis of 2D tin di/sulfide (PS-SnS₂-x, x = 0 or 1) from thioacetamide (TAA) and tin (IV) chloride in an aqueous system. The synthesized PS-SnS₂-x were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), a particle size distribution analyzer, X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), thermal analysis, UV⁻Vis diffuse reflectance spectroscopy (DR UV⁻Vis), and photoluminescence (PL) spectroscopy. In this study, the PS-SnS₂-x showed hexagonally closed-packed crystals having nanosheets morphology with the average size of 870 nm. Furthermore, the nanosheets PS-SnS₂-x demonstrated reusable photo-degradation of methylene blue (MB) dye as a water pollutant, owing to the stable electronic conducting properties with estimated bandgap (Eg) at ~2.5 eV. Importantly, the study provides a green protocol by using photochemical synthesis to produce 2D nanosheets of semiconductor materials showing photo-degradation activity under sunlight response.
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Affiliation(s)
- Juan Matmin
- Centre of Foundation Studies UiTM, Universiti Teknologi MARA (UiTM), Cawangan Selangor, Kampus Dengkil, 43800 Dengkil, Selangor, Malaysia.
| | - Mohamad Azani Jalani
- Kolej PERMATA Insan, Universiti Sains Islam Malaysia (USIM), Kompleks PERMATA Insan, Bandar, Baru Nilai, 71800 Nilai, Negeri Sembilan, Malaysia.
| | - Hazwanee Osman
- Centre of Foundation Studies UiTM, Universiti Teknologi MARA (UiTM), Cawangan Selangor, Kampus Dengkil, 43800 Dengkil, Selangor, Malaysia.
| | - Qistina Omar
- Centre of Foundation Studies UiTM, Universiti Teknologi MARA (UiTM), Cawangan Selangor, Kampus Dengkil, 43800 Dengkil, Selangor, Malaysia.
| | - NorulNazilah Ab'lah
- Centre of Foundation Studies UiTM, Universiti Teknologi MARA (UiTM), Cawangan Selangor, Kampus Dengkil, 43800 Dengkil, Selangor, Malaysia.
| | - Kelimah Elong
- Centre for Nanomaterials Research, Institute of Science, Universiti Teknologi MARA (UiTM), Level 3, Block C, 40450 Shah Alam, Selangor, Malaysia.
| | - Muhd Firdaus Kasim
- Centre for Nanomaterials Research, Institute of Science, Universiti Teknologi MARA (UiTM), Level 3, Block C, 40450 Shah Alam, Selangor, Malaysia.
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19
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Impulsive UV-pump/X-ray probe study of vibrational dynamics in glycine. Sci Rep 2018; 8:15466. [PMID: 30337694 PMCID: PMC6193943 DOI: 10.1038/s41598-018-33607-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 09/27/2018] [Indexed: 11/24/2022] Open
Abstract
We report an ab-initio study of a pump-probe experiment on the amino-acid glycine. We consider an UV pump followed by an X-ray probe tuned to carbon K-edge and study the vibronic structure of the core transition. The simulated experiment is feasible using existing free electron laser or high harmonic generation sources and thanks to the localization of the core orbitals posseses chemical selectivity. The present theory applies to other experimental schemes, including the use of a THz probe, available with present soft X-ray free electron lasers and/or high harmonic generation sources.
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20
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Duchemin N, Skiredj A, Mansot J, Leblanc K, Vasseur J, Beniddir MA, Evanno L, Poupon E, Smietana M, Arseniyadis S. DNA‐Templated [2+2] Photocycloaddition: A Straightforward Entry into the Aplysinopsin Family of Natural Products. Angew Chem Int Ed Engl 2018; 57:11786-11791. [DOI: 10.1002/anie.201806357] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Nicolas Duchemin
- Queen Mary University of LondonSchool of Biological and Chemical Sciences Mile End Road London E1 4NS UK
| | - Adam Skiredj
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCISUniversité Paris-SudUniversité Paris-Saclay 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Justine Mansot
- Institut des Biomolécules Max MousseronCNRS, UMR 5247 Université de MontpellierENSCM Place Eugène Bataillon 34095 Montpellier France
| | - Karine Leblanc
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCISUniversité Paris-SudUniversité Paris-Saclay 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Jean‐Jacques Vasseur
- Institut des Biomolécules Max MousseronCNRS, UMR 5247 Université de MontpellierENSCM Place Eugène Bataillon 34095 Montpellier France
| | - Mehdi A. Beniddir
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCISUniversité Paris-SudUniversité Paris-Saclay 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Laurent Evanno
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCISUniversité Paris-SudUniversité Paris-Saclay 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Erwan Poupon
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCISUniversité Paris-SudUniversité Paris-Saclay 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Michael Smietana
- Institut des Biomolécules Max MousseronCNRS, UMR 5247 Université de MontpellierENSCM Place Eugène Bataillon 34095 Montpellier France
| | - Stellios Arseniyadis
- Queen Mary University of LondonSchool of Biological and Chemical Sciences Mile End Road London E1 4NS UK
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21
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Duchemin N, Skiredj A, Mansot J, Leblanc K, Vasseur JJ, Beniddir MA, Evanno L, Poupon E, Smietana M, Arseniyadis S. DNA-Templated [2+2] Photocycloaddition: A Straightforward Entry into the Aplysinopsin Family of Natural Products. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806357] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Nicolas Duchemin
- Queen Mary University of London; School of Biological and Chemical Sciences; Mile End Road London E1 4NS UK
| | - Adam Skiredj
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS; Université Paris-Sud; Université Paris-Saclay; 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Justine Mansot
- Institut des Biomolécules Max Mousseron; CNRS, UMR 5247 Université de Montpellier; ENSCM; Place Eugène Bataillon 34095 Montpellier France
| | - Karine Leblanc
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS; Université Paris-Sud; Université Paris-Saclay; 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Jean-Jacques Vasseur
- Institut des Biomolécules Max Mousseron; CNRS, UMR 5247 Université de Montpellier; ENSCM; Place Eugène Bataillon 34095 Montpellier France
| | - Mehdi A. Beniddir
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS; Université Paris-Sud; Université Paris-Saclay; 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Laurent Evanno
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS; Université Paris-Sud; Université Paris-Saclay; 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Erwan Poupon
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS; Université Paris-Sud; Université Paris-Saclay; 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Michael Smietana
- Institut des Biomolécules Max Mousseron; CNRS, UMR 5247 Université de Montpellier; ENSCM; Place Eugène Bataillon 34095 Montpellier France
| | - Stellios Arseniyadis
- Queen Mary University of London; School of Biological and Chemical Sciences; Mile End Road London E1 4NS UK
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22
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Bejcek LP, Murelli RP. Oxidopyrylium [5+2] Cycloaddition Chemistry: Historical Perspective and Recent Advances (2008-2018). Tetrahedron 2018; 74:2501-2521. [PMID: 30455508 PMCID: PMC6238658 DOI: 10.1016/j.tet.2018.04.006] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Lauren P Bejcek
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, NY, Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY
| | - Ryan P Murelli
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, NY, Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY
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23
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Scesa P, Wangpaichitr M, Savaraj N, West L, Roche SP. A Kinetic Dearomatization Strategy for an Expedient Biomimetic Route to the Bielschowskysin Skeleton. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711780] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Paul Scesa
- Department of Chemistry & Biochemistry; Florida Atlantic University; 777 Glades Road Boca Raton FL 33431 USA
| | - Medhi Wangpaichitr
- University of Miami School of Medicine; 1475 NW 12 Ave Miami FL 33136 USA
| | - Niramol Savaraj
- University of Miami School of Medicine; 1475 NW 12 Ave Miami FL 33136 USA
| | - Lyndon West
- Department of Chemistry & Biochemistry; Florida Atlantic University; 777 Glades Road Boca Raton FL 33431 USA
| | - Stéphane P. Roche
- Department of Chemistry & Biochemistry; Florida Atlantic University; 777 Glades Road Boca Raton FL 33431 USA
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24
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Scesa P, Wangpaichitr M, Savaraj N, West L, Roche SP. A Kinetic Dearomatization Strategy for an Expedient Biomimetic Route to the Bielschowskysin Skeleton. Angew Chem Int Ed Engl 2018; 57:1316-1321. [DOI: 10.1002/anie.201711780] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Indexed: 01/14/2023]
Affiliation(s)
- Paul Scesa
- Department of Chemistry & Biochemistry; Florida Atlantic University; 777 Glades Road Boca Raton FL 33431 USA
| | - Medhi Wangpaichitr
- University of Miami School of Medicine; 1475 NW 12 Ave Miami FL 33136 USA
| | - Niramol Savaraj
- University of Miami School of Medicine; 1475 NW 12 Ave Miami FL 33136 USA
| | - Lyndon West
- Department of Chemistry & Biochemistry; Florida Atlantic University; 777 Glades Road Boca Raton FL 33431 USA
| | - Stéphane P. Roche
- Department of Chemistry & Biochemistry; Florida Atlantic University; 777 Glades Road Boca Raton FL 33431 USA
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25
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Winter N, Trauner D. Thiocarbonyl Ylide Chemistry Enables a Concise Synthesis of (±)-Hippolachnin A. J Am Chem Soc 2017; 139:11706-11709. [DOI: 10.1021/jacs.7b06815] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nils Winter
- Department
of Chemistry, Ludwig-Maximilians-Universität München, Butenandtstraße
5-13, 81377 Munich, Germany
| | - Dirk Trauner
- Department
of Chemistry, Ludwig-Maximilians-Universität München, Butenandtstraße
5-13, 81377 Munich, Germany
- Department
of Chemistry, New York University, Silver Center, 100 Washington Square
East, Room 712, New York, 10003, United States
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26
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Hughes JME, Gleason JL. A Concise Enantioselective Total Synthesis of (−)-Virosaine A. Angew Chem Int Ed Engl 2017; 56:10830-10834. [DOI: 10.1002/anie.201706273] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Jonathan M. E. Hughes
- Department of Chemistry; McGill University; 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
| | - James L. Gleason
- Department of Chemistry; McGill University; 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
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27
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Hughes JME, Gleason JL. A Concise Enantioselective Total Synthesis of (−)-Virosaine A. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706273] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jonathan M. E. Hughes
- Department of Chemistry; McGill University; 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
| | - James L. Gleason
- Department of Chemistry; McGill University; 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
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28
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Lam HC, Pepper HP, Sumby CJ, George JH. Biomimetic Total Synthesis of (±)‐Verrubenzospirolactone. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hiu C. Lam
- Department of Chemistry University of Adelaide Adelaide SA 5005 Australia
| | - Henry P. Pepper
- Department of Chemistry University of Adelaide Adelaide SA 5005 Australia
| | | | - Jonathan H. George
- Department of Chemistry University of Adelaide Adelaide SA 5005 Australia
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29
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Craig RA, Stoltz BM. Polycyclic Furanobutenolide-Derived Cembranoid and Norcembranoid Natural Products: Biosynthetic Connections and Synthetic Efforts. Chem Rev 2017; 117:7878-7909. [PMID: 28520418 PMCID: PMC5497599 DOI: 10.1021/acs.chemrev.7b00083] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The polycyclic furanobutenolide-derived cembranoid and norcembranoid natural products are a family of congested, stereochemically complex, and extensively oxygenated polycyclic diterpenes and norditerpenes. Although the elegant architectures and biological activity profiles of these natural products have captured the attention of chemists since the isolation of the first members of the family in the 1990s, the de novo synthesis of only a single polycyclic furanobutenolide-derived cembranoid and norcembranoid has been accomplished. This article begins with a brief discussion of the proposed biosyntheses and biosynthetic connections among the polycyclic furanobutenolide-derived cembranoids and norcembranoids and then provides a comprehensive review of the synthetic efforts toward each member of the natural product family, including biomimetic, semisynthetic, and de novo synthetic strategies. This body of knowledge has been gathered to provide insight into the reactivity and constraints of these compact and highly oxygenated polycyclic structures, as well as to offer guidance for future synthetic endeavors.
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Affiliation(s)
- Robert A. Craig
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Brian M. Stoltz
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
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30
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Hao HD, Trauner D. Furans as Versatile Synthons: Total Syntheses of Caribenol A and Caribenol B. J Am Chem Soc 2017; 139:4117-4122. [DOI: 10.1021/jacs.7b00234] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Hong-Dong Hao
- Department of Chemistry and Center for
Integrated Protein Science, Ludwig-Maximilians-Universität München, Butenandtstrasse
5-13, 81377 München, Germany
| | - Dirk Trauner
- Department of Chemistry and Center for
Integrated Protein Science, Ludwig-Maximilians-Universität München, Butenandtstrasse
5-13, 81377 München, Germany
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31
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Lam HC, Pepper HP, Sumby CJ, George JH. Biomimetic Total Synthesis of (±)‐Verrubenzospirolactone. Angew Chem Int Ed Engl 2017; 56:8532-8535. [DOI: 10.1002/anie.201700114] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Indexed: 12/20/2022]
Affiliation(s)
- Hiu C. Lam
- Department of Chemistry University of Adelaide Adelaide SA 5005 Australia
| | - Henry P. Pepper
- Department of Chemistry University of Adelaide Adelaide SA 5005 Australia
| | | | - Jonathan H. George
- Department of Chemistry University of Adelaide Adelaide SA 5005 Australia
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32
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Gorobets E, Wong NE, Paton RS, Derksen DJ. Divergent Photocyclization/1,4-Sigmatropic Rearrangements for the Synthesis of Sesquiterpenoid Derivatives. Org Lett 2017; 19:484-487. [PMID: 28124915 DOI: 10.1021/acs.orglett.6b03635] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Combined experimental and computational efforts have demonstrated the utility of divergent photocyclization/1,4-sigmatropic rearrangement reactions for developing a general strategy toward the synthesis of cubebane-, spiroaxane-, and guaiane-type sesquiterpenes and related analogues. The configuration of the bridgehead substituent, the choice of solvent, and the wavelength of irradiation all impact diastereoselectivity in this tandem reaction process.
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Affiliation(s)
- Evgueni Gorobets
- Department of Chemistry, University of Calgary , 2500 University Drive NW, Calgary, Alberta Canada T2N 1N4
| | - Norman E Wong
- Department of Chemistry, University of Calgary , 2500 University Drive NW, Calgary, Alberta Canada T2N 1N4
| | - Robert S Paton
- Chemistry Research Laboratory, Oxford University , Mansfield Road, Oxford OX1 3TA, U.K
| | - Darren J Derksen
- Department of Chemistry, University of Calgary , 2500 University Drive NW, Calgary, Alberta Canada T2N 1N4
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33
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Matsuura BS, Kölle P, Trauner D, de Vivie-Riedle R, Meier R. Unravelling Photochemical Relationships Among Natural Products from Aplysia dactylomela. ACS CENTRAL SCIENCE 2017; 3:39-46. [PMID: 28149951 PMCID: PMC5269658 DOI: 10.1021/acscentsci.6b00293] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Indexed: 06/06/2023]
Abstract
Aplydactone (1) is a brominated ladderane sesquiterpenoid that was isolated from the sea hare Aplysia dactylomela together with the chamigranes dactylone (2) and 10-epi-dactylone (3). Given the habitat of A. dactylomela, it seems likely that 1 is formed from 2 through a photochemical [2 + 2] cycloaddition. Here, we disclose a concise synthesis of 1, 2, and 3 that was guided by excited state theory and relied on several highly stereoselective transformations. Our experiments and calculations confirm the photochemical origin of 1 and explain why it is formed as the sole isomer. Irradiation of 3 with long wavelength UV light resulted in a [2 + 2] cycloaddition that proceeded with opposite regioselectivity. On the basis of this finding, it seems likely that the resulting regioisomer, termed "8-epi-isoaplydactone", could also be found in A. dactylomela.
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34
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Divergent synthesis and identification of the cellular targets of deoxyelephantopins. Nat Commun 2016; 7:12470. [PMID: 27539788 PMCID: PMC4992173 DOI: 10.1038/ncomms12470] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 06/23/2016] [Indexed: 12/12/2022] Open
Abstract
Herbal extracts containing sesquiterpene lactones have been extensively used in traditional medicine and are known to be rich in α,β-unsaturated functionalities that can covalently engage target proteins. Here we report synthetic methodologies to access analogues of deoxyelephantopin, a sesquiterpene lactone with anticancer properties. Using alkyne-tagged cellular probes and quantitative proteomics analysis, we identified several cellular targets of deoxyelephantopin. We further demonstrate that deoxyelephantopin antagonizes PPARγ activity in situ via covalent engagement of a cysteine residue in the zinc-finger motif of this nuclear receptor. Deoxyelephantopin is a naturally occurring sesquiterpene lactone with known anticancer properties. Here, the authors synthesize deoxyelephantopins and a range of analogues including alkyne-tagged probes, using them to identify its cellular targets.
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35
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Affiliation(s)
- Robin Meier
- Department Chemie; Ludwig-Maximilians-Universität München; 81377 München Deutschland
| | - Dirk Trauner
- Department Chemie; Ludwig-Maximilians-Universität München; 81377 München Deutschland
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36
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Meier R, Trauner D. A Synthesis of (±)-Aplydactone. Angew Chem Int Ed Engl 2016; 55:11251-5. [DOI: 10.1002/anie.201604102] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Indexed: 02/02/2023]
Affiliation(s)
- Robin Meier
- Department of Chemistry; Ludwig-Maximilians-Universität München; 81377 Munich Germany
| | - Dirk Trauner
- Department of Chemistry; Ludwig-Maximilians-Universität München; 81377 Munich Germany
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37
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Farcet JB, Mulzer J, Himmelbauer MK. An Approach Toward the Bridged 14-Membered Carbon Macrocycle of Bielschowskysin. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600271] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jean-Baptiste Farcet
- Department of Organic Chemistry; University of Vienna; Währinger Straße 38 1090 Vienna Austria
| | - Johann Mulzer
- Department of Organic Chemistry; University of Vienna; Währinger Straße 38 1090 Vienna Austria
| | - Martin K. Himmelbauer
- Department of Organic Chemistry; University of Vienna; Währinger Straße 38 1090 Vienna Austria
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38
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Siadati SA. The Effect of Position Replacement of Functional Groups on the Stepwise character of 1,3-Dipolar Reaction of a Nitrile Oxide and an Alkene. Helv Chim Acta 2016. [DOI: 10.1002/hlca.201500165] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Seyyed Amir Siadati
- Department of Chemistry; Qaemshahr Branch; Islamic Azad University; Qaemshahr Iran
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39
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Abstract
This review covers the literature published in 2014 for marine natural products (MNPs), with 1116 citations (753 for the period January to December 2014) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1378 in 456 papers for 2014), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
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40
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Guidotti BB, Coelho F. Sequential Morita–Baylis–Hillman/Achmatowicz reactions: an expeditious access to pyran-3(6H)-ones with a unique substitution pattern. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.09.120] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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41
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Zhou J, Zhang J, Cheng A, Xiong Y, Liu L, Lou H. Highly Rigid Labdane-Type Diterpenoids from a Chinese Liverwort and Light-Driven Structure Diversification. Org Lett 2015; 17:3560-3. [PMID: 26111119 DOI: 10.1021/acs.orglett.5b01664] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two unprecedented labdane-type diterpenoids haplomintrins A (1) and B (2) with six rings system were isolated from a Chinese liverwort Haplomitrium mnioides. Light-driven reaction of homologous haplomitrenonolides C (6), A (4), and D (3) afforded haplomintrins A-C (1, 2, and 7), respectively, while 4 was converted to more complex congeners haplomintrins D-G (8-11) through intramolecular cyclization. Formation of 1 and 2 from compounds 6 and 4, respectively, helps us to postulate that a photochemical reaction is involved in the biosynthetic pathway. These structure features can be used as molecular markers of H. mnioides, and their allelopathic effects are also preliminarily tested.
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Affiliation(s)
- Jinchuan Zhou
- †Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, P. R. China
| | - Jiaozhen Zhang
- †Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, P. R. China
| | - Aixia Cheng
- †Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, P. R. China
| | - Yuanxin Xiong
- ‡College of Life Sciences, Guizhou Unversity, Guiyang 550025, P. R. China
| | - Lei Liu
- †Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, P. R. China
| | - Hongxiang Lou
- †Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, P. R. China
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