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Zhang Y, Ji Y, Franzoni I, Guo C, Jia H, Hong B, Li H. Enantioselective Total Synthesis of Berkeleyone A and Preaustinoids. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yang Zhang
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Road No. 38 Beijing 100191 China
| | - Yunpeng Ji
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Road No. 38 Beijing 100191 China
| | - Ivan Franzoni
- NuChem Sciences 2350 rue Cohen Suite 201, Saint-Laurent Quebec H4R 2N6 Canada
| | - Chuning Guo
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Road No. 38 Beijing 100191 China
| | - Hongli Jia
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Road No. 38 Beijing 100191 China
| | - Benke Hong
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Road No. 38 Beijing 100191 China
| | - Houhua Li
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Road No. 38 Beijing 100191 China
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Zhang Y, Ji Y, Franzoni I, Guo C, Jia H, Hong B, Li H. Enantioselective Total Synthesis of Berkeleyone A and Preaustinoids. Angew Chem Int Ed Engl 2021; 60:14869-14874. [PMID: 33856105 DOI: 10.1002/anie.202104014] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Indexed: 01/09/2023]
Abstract
Herein we report the first enantioselective total synthesis of 3,5-dimethylorsellinic acid-derived meroterpenoids (-)-berkeleyone A and its five congeners ((-)-preaustinoids A, A1, B, B1, and B2) in 12-15 steps, starting from commercially available 2,4,6-trihydroxybenzoic acid hydrate. Based upon the recognition of latent symmetry within D-ring, our convergent synthesis features two critical reactions: 1) a symmetry-breaking, diastereoselective dearomative alkylation to assemble the entire carbon core, and 2) a Sc(OTf)3 -mediated sequential Krapcho dealkoxycarbonylation/carbonyl α-tert-alkylation to forge the intricate bicyclo[3.3.1]nonane framework. We also conducted our preliminary biomimetic investigations and uncovered a series of rearrangements (α-ketol, α-hydroxyl-β-diketone, etc.) responsible for the biomimetic diversification of (-)-berkeleyone A into its five preaustinoid congeners.
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Affiliation(s)
- Yang Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Yunpeng Ji
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Ivan Franzoni
- NuChem Sciences, 2350 rue Cohen Suite 201, Saint-Laurent, Quebec, H4R 2N6, Canada
| | - Chuning Guo
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Hongli Jia
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Benke Hong
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Houhua Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
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Powers Z, Scharf A, Cheng A, Yang F, Himmelbauer M, Mitsuhashi T, Barra L, Taniguchi Y, Kikuchi T, Fujita M, Abe I, Porco JA. Biomimetic Synthesis of Meroterpenoids by Dearomatization-Driven Polycyclization. Angew Chem Int Ed Engl 2019; 58:16141-16146. [PMID: 31515901 PMCID: PMC6814491 DOI: 10.1002/anie.201910710] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Indexed: 12/16/2022]
Abstract
A biomimetic route to farnesyl pyrophosphate and dimethyl orsellinic acid (DMOA)-derived meroterpenoid scaffolds has yet to be reported despite great interest from the chemistry and biomedical research communities. A concise synthetic route with the potential to access DMOA-derived meroterpenoids is highly desirable to create a library of related compounds. Herein, we report novel dearomatization methodology followed by polyene cyclization to access DMOA-derived meroterpenoid frameworks in six steps from commercially available starting materials. Furthermore, several farnesyl alkene substrates were used to generate structurally novel, DMOA-derived meroterpenoid derivatives. DFT calculations combined with experimentation provided a rationale for the observed thermodynamic distribution of polycyclization products.
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Affiliation(s)
- Zachary Powers
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts, 02215, USA
| | - Adam Scharf
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts, 02215, USA
| | - Andrea Cheng
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts, 02215, USA
| | - Feng Yang
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts, 02215, USA
| | - Martin Himmelbauer
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts, 02215, USA
| | - Takaaki Mitsuhashi
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyoku, Tokyo, 113-0033, Japan
| | | | - Yoshimasa Taniguchi
- Central Laboratories for Key Technologies, Kirin Holdings Co. Ltd., 1-13-5, Fukuura Kanazawaku, Yokohama-shi, Kanagawa, 236-0004, Japan
| | - Takashi Kikuchi
- Rigaku Corporation, 3-9-12 Matsubaracho, Akishima-shi, Tokyo, 196-8666, Japan
| | - Makoto Fujita
- Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyoku, Tokyo, 113-8656, Japan
| | - Ikuro Abe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyoku, Tokyo, 113-0033, Japan
| | - John A Porco
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts, 02215, USA
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Powers Z, Scharf A, Cheng A, Yang F, Himmelbauer M, Mitsuhashi T, Barra L, Taniguchi Y, Kikuchi T, Fujita M, Abe I, Porco JA. Biomimetic Synthesis of Meroterpenoids by Dearomatization‐Driven Polycyclization. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201910710] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Zachary Powers
- Department of ChemistryCenter for Molecular Discovery (BU-CMD)Boston University 590 Commonwealth Avenue Boston Massachusetts 02215 USA
| | - Adam Scharf
- Department of ChemistryCenter for Molecular Discovery (BU-CMD)Boston University 590 Commonwealth Avenue Boston Massachusetts 02215 USA
| | - Andrea Cheng
- Department of ChemistryCenter for Molecular Discovery (BU-CMD)Boston University 590 Commonwealth Avenue Boston Massachusetts 02215 USA
| | - Feng Yang
- Department of ChemistryCenter for Molecular Discovery (BU-CMD)Boston University 590 Commonwealth Avenue Boston Massachusetts 02215 USA
| | - Martin Himmelbauer
- Department of ChemistryCenter for Molecular Discovery (BU-CMD)Boston University 590 Commonwealth Avenue Boston Massachusetts 02215 USA
| | - Takaaki Mitsuhashi
- Graduate School of Pharmaceutical SciencesThe University of Tokyo 7-3-1 Hongo, Bunkyoku Tokyo 113-0033 Japan
| | | | - Yoshimasa Taniguchi
- Central Laboratories for Key TechnologiesKirin Holdings Co. Ltd. 1-13-5, Fukuura Kanazawaku Yokohama-shi Kanagawa 236-0004 Japan
| | - Takashi Kikuchi
- Rigaku Corporation 3-9-12 Matsubaracho, Akishima-shi Tokyo 196-8666 Japan
| | - Makoto Fujita
- Department of Applied ChemistryGraduate School of EngineeringThe University of Tokyo 7-3-1 Hongo, Bunkyoku Tokyo 113-8656 Japan
| | - Ikuro Abe
- Graduate School of Pharmaceutical SciencesThe University of Tokyo 7-3-1 Hongo, Bunkyoku Tokyo 113-0033 Japan
| | - John A. Porco
- Department of ChemistryCenter for Molecular Discovery (BU-CMD)Boston University 590 Commonwealth Avenue Boston Massachusetts 02215 USA
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Wen S, Boyce JH, Kandappa SK, Sivaguru J, Porco JA. Regiodivergent Photocyclization of Dearomatized Acylphloroglucinols: Asymmetric Syntheses of (-)-Nemorosone and (-)-6- epi-Garcimultiflorone A. J Am Chem Soc 2019; 141:11315-11321. [PMID: 31264859 DOI: 10.1021/jacs.9b05600] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Regiodivergent photocyclization of dearomatized acylphloroglucinol substrates has been developed to produce type A polycyclic polyprenylated acylphloroglucinol (PPAP) derivatives using an excited-state intramolecular proton transfer (ESIPT) process. Using this strategy, we achieved the enantioselective total syntheses of the type A PPAPs (-)-nemorosone and (-)-6-epi-garcimultiflorone A. Diverse photocyclization substrates have been investigated leading to divergent photocyclization processes as a function of tether length. Photophysical studies were performed, and photocyclization mechanisms were proposed based on investigation of various substrates as well as deuterium-labeling experiments.
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Affiliation(s)
- Saishuai Wen
- Department of Chemistry, Center for Molecular Discovery (BU-CMD) , Boston University , 590 Commonwealth Avenue , Boston , Massachusetts 02215 , United States
| | - Jonathan H Boyce
- Department of Chemistry, Center for Molecular Discovery (BU-CMD) , Boston University , 590 Commonwealth Avenue , Boston , Massachusetts 02215 , United States
| | - Sunil K Kandappa
- Center for Photochemical Sciences and the Department of Chemistry , Bowling Green State University , Bowling Green , Ohio 43403-0001 , United States
| | - Jayaraman Sivaguru
- Center for Photochemical Sciences and the Department of Chemistry , Bowling Green State University , Bowling Green , Ohio 43403-0001 , United States
| | - John A Porco
- Department of Chemistry, Center for Molecular Discovery (BU-CMD) , Boston University , 590 Commonwealth Avenue , Boston , Massachusetts 02215 , United States
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Lui MY, Noè M, Masters AF, Maschmeyer T. Selective Catalytic Methylation of Phloroglucinol with Dimethyl Carbonate in the Presence of Heterogeneous Acids. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Matthew Y. Lui
- Laboratory of Advanced Catalysis for Sustainability; School of Chemistry F11; The University of Sydney; 2006 Sydney, NSW Australia
| | - Marco Noè
- Laboratory of Advanced Catalysis for Sustainability; School of Chemistry F11; The University of Sydney; 2006 Sydney, NSW Australia
| | - Anthony F. Masters
- Laboratory of Advanced Catalysis for Sustainability; School of Chemistry F11; The University of Sydney; 2006 Sydney, NSW Australia
| | - Thomas Maschmeyer
- Laboratory of Advanced Catalysis for Sustainability; School of Chemistry F11; The University of Sydney; 2006 Sydney, NSW Australia
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Mellerup SK, Li C, Wang X, Wang S. Controlling Isomerization Selectivity in Chiral, Photochromic N,C-Chelate Organoboron Systems with Extended π-Conjugation. J Org Chem 2018; 83:11970-11977. [PMID: 30178675 DOI: 10.1021/acs.joc.8b01856] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Alkyne-functionalized chelate boron compounds with extended π-conjugation on one of the aryl groups attached to boron display thermally reversible and regioselective isomerization on the more delocalized substituent, forming base-stabilized boriranes with an intense color. Linking two of such boron chromophores through a 1,4-phenylene spacer via ethynyl moieties leads to photochemically inert molecules, while connecting them by a nonconjugated silicon bridge yields photochromic systems capable of switching at a single boron center.
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Affiliation(s)
- Soren K Mellerup
- Department of Chemistry , Queen's University , Kingston , Ontario K7L 3N6 , Canada
| | - Cally Li
- Department of Chemistry , Queen's University , Kingston , Ontario K7L 3N6 , Canada
| | - Xiang Wang
- Department of Chemistry , Queen's University , Kingston , Ontario K7L 3N6 , Canada
| | - Suning Wang
- Department of Chemistry , Queen's University , Kingston , Ontario K7L 3N6 , Canada
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Bellavance G, Barriault L. Modular Total Syntheses of Hyperforin, Papuaforins A, B, and C via Gold(I)-Catalyzed Carbocyclization. J Org Chem 2018; 83:7215-7230. [PMID: 29732886 DOI: 10.1021/acs.joc.8b00426] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The remarkable biological activities of polyprenylated polycyclic acylphloroglucinols (PPAPs) combined with their highly oxygenated and densely functionalized frameworks have stimulated the interest of synthetic organic chemists over the past decade. Herein, we report the concise total syntheses of four natural products PPAPs, of which some have antibacterial properties, notably hyperforin and papuaforin A. The salient features of this strategy are the short and gram-scalable synthesis of densely substituted PPAPs scaffolds via a Au(I)-catalyzed carbocyclization and the late-stage functionalization for a unified access to a wide variety of PPAPs.
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Affiliation(s)
- Gabriel Bellavance
- Centre for Catalysis, Research and Innovation, Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa K1N 6N5 , Canada
| | - Louis Barriault
- Centre for Catalysis, Research and Innovation, Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa K1N 6N5 , Canada
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