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Yan P, Stegbauer S, Wu Q, Kolodzeiski E, Stein CJ, Lu P, Bach T. Enantioselective Intramolecular ortho Photocycloaddition Reactions of 2-Acetonaphthones. Angew Chem Int Ed Engl 2024; 63:e202318126. [PMID: 38275271 DOI: 10.1002/anie.202318126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/22/2024] [Accepted: 01/23/2024] [Indexed: 01/27/2024]
Abstract
2-Acetonaphthones, which bear an alkenyl group tethered to its C1 carbon atom via an oxygen atom, were found to undergo an enantioselective intramolecular ortho photocycloaddition reaction. A chiral oxazaborolidine Lewis acid leads to a bathochromic absorption shift of the substrate and enables an efficient enantioface differentiation. Visible light irradiation (λ=450 nm) triggers the reaction which is tolerant of various groups at almost any position except carbon atom C8 (16 examples, 53-99 % yield, 80-97 % ee). Consecutive reactions were explored including a sensitized rearrangement to tetrahydrobiphenylenes, which occurred with full retention of configuration. Evidence was collected that the catalytic photocycloaddition occurs via triplet intermediates, and the binding mode of the acetonaphthone to the chiral Lewis acid was elucidated by DFT calculations.
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Affiliation(s)
- Peng Yan
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, China
| | - Simone Stegbauer
- Department Chemie and Catalysis Research Center (CRC) School of Natural Sciences, Technische Universität München, Lichtenbergstraße 4, D-85747, Garching, Germany
| | - Qinqin Wu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, China
| | - Elena Kolodzeiski
- Department Chemie and Catalysis Research Center (CRC) School of Natural Sciences, Technische Universität München, Lichtenbergstraße 4, D-85747, Garching, Germany
| | - Christopher J Stein
- Department Chemie and Catalysis Research Center (CRC) School of Natural Sciences, Technische Universität München, Lichtenbergstraße 4, D-85747, Garching, Germany
| | - Ping Lu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, China
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC) School of Natural Sciences, Technische Universität München, Lichtenbergstraße 4, D-85747, Garching, Germany
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2
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Proessdorf J, Jandl C, Pickl T, Bach T. Arene Activation through Iminium Ions: Product Diversity from Intramolecular Photocycloaddition Reactions. Angew Chem Int Ed Engl 2022; 61:e202208329. [PMID: 35920713 PMCID: PMC9826208 DOI: 10.1002/anie.202208329] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Indexed: 01/11/2023]
Abstract
While 2-alk-ω-enyloxy-sustituted benzaldehydes do not display any photochemical reactivity at the arene core, the respective iminium perchlorates were found to undergo efficient reactions either upon direct irradiation (λ=366 nm) or under sensitizing conditions (λ=420 nm, 2.5 mol% thioxanthen-9-one). Three pathways were found: (a) Most commonly, the reaction led to benzoxacyclic products in which the olefin in the tether underwent a formal, yet unprecedented carboformylation (13 examples, 44-99 % yield). The cascade process occurred with high diastereoselectivity and was found to be stereoconvergent. (b) If a substituent resides in the 3-position of the benzene ring, a meta photocycloaddition was observed which produced tetracyclic skeletons with five stereogenic centers in excellent regio- and diastereoselectivity (2 examples, 58-79 % yield). (c) If the tether was internally substituted at the alkene, an arene photocycloaddition was avoided and an azetidine was formed in an aza Paternò-Büchi reaction (2 examples, 95-98 % yield).
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Affiliation(s)
- Johanna Proessdorf
- Department Chemie and Catalysis Research Center (CRC)School of Natural SciencesTechnische Universität MünchenLichtenbergstraße 485747GarchingGermany
| | - Christian Jandl
- Department Chemie and Catalysis Research Center (CRC)School of Natural SciencesTechnische Universität MünchenLichtenbergstraße 485747GarchingGermany
| | - Thomas Pickl
- Department Chemie and Catalysis Research Center (CRC)School of Natural SciencesTechnische Universität MünchenLichtenbergstraße 485747GarchingGermany
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC)School of Natural SciencesTechnische Universität MünchenLichtenbergstraße 485747GarchingGermany
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3
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Proessdorf J, Jandl C, Pickl T, Bach T. Arene Activation through Iminium Ions: Product Diversity from Intramolecular Photocycloaddition Reactions. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208329] [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)
- Johanna Proessdorf
- Technische Universität München: Technische Universitat Munchen Department Chemie GERMANY
| | - Christian Jandl
- Technische Universität München: Technische Universitat Munchen Department Chemie GERMANY
| | - Thomas Pickl
- Technische Universität München: Technische Universitat Munchen Department Chemie GERMANY
| | - Thorsten Bach
- Technische Universität München Lehrstuhl für Organische Chemie I Lichtenbergstr. 4 85747 Garching GERMANY
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4
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Rauscher N, Næsborg L, Jandl C, Bach T. Concise Total Synthesis of Agarozizanol B via a Strained Photocascade Intermediate. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202110009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Niklas Rauscher
- Technische Universität München School of Natural Sciences Department of Chemistry and Catalysis Research Center Lichtenbergstrasse 4 85747 Garching Germany
| | - Line Næsborg
- Technische Universität München School of Natural Sciences Department of Chemistry and Catalysis Research Center Lichtenbergstrasse 4 85747 Garching Germany
| | - Christian Jandl
- Technische Universität München School of Natural Sciences Department of Chemistry and Catalysis Research Center Lichtenbergstrasse 4 85747 Garching Germany
| | - Thorsten Bach
- Technische Universität München School of Natural Sciences Department of Chemistry and Catalysis Research Center Lichtenbergstrasse 4 85747 Garching Germany
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5
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Rauscher N, Næsborg L, Jandl C, Bach T. Concise Total Synthesis of Agarozizanol B via a Strained Photocascade Intermediate. Angew Chem Int Ed Engl 2021; 60:24039-24042. [PMID: 34519408 PMCID: PMC8596452 DOI: 10.1002/anie.202110009] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Indexed: 11/22/2022]
Abstract
The prezizane-type sesquiterpene agarozizanol B was synthesized employing a photochemical cascade reaction as the key step. Starting from a readily available 1-indanone with a tethered olefin, a strained tetracyclic skeleton was assembled which contained all carbon atoms of the sesquiterpene with the correct relative configuration. The conversion into the tricyclic prezizane skeleton was accomplished by a strategic cyclopropane bond cleavage. Prior to the cyclopropane ring opening an adaption of the oxidation state was required, which could be combined with a reductive resolution step. After removal of two functional groups, the natural product was obtained both in racemic form or, if resolved, as the (+)-enantiomer which was shown to be identical to the natural product.
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Affiliation(s)
- Niklas Rauscher
- Technische Universität MünchenSchool of Natural SciencesDepartment of Chemistry and Catalysis Research CenterLichtenbergstrasse 485747GarchingGermany
| | - Line Næsborg
- Technische Universität MünchenSchool of Natural SciencesDepartment of Chemistry and Catalysis Research CenterLichtenbergstrasse 485747GarchingGermany
| | - Christian Jandl
- Technische Universität MünchenSchool of Natural SciencesDepartment of Chemistry and Catalysis Research CenterLichtenbergstrasse 485747GarchingGermany
| | - Thorsten Bach
- Technische Universität MünchenSchool of Natural SciencesDepartment of Chemistry and Catalysis Research CenterLichtenbergstrasse 485747GarchingGermany
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6
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Yan P, Zhong C, Zhang J, Liu Y, Fang H, Lu P. 3‐(Methoxycarbonyl)Cyclobutenone as a Reactive Dienophile in Enantioselective Diels–Alder Reactions Catalyzed by Chiral Oxazaborolidinium Ions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Peng Yan
- Department of Research Center for Molecular Recognition and Synthesis Department of Chemistry Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Changxu Zhong
- Department of Research Center for Molecular Recognition and Synthesis Department of Chemistry Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Jie Zhang
- College of Chemistry and Life Advanced Institute of Materials Science Changchun University of Technology Changchun 130012 P. R. China
| | - Yu Liu
- College of Chemistry and Life Advanced Institute of Materials Science Changchun University of Technology Changchun 130012 P. R. China
| | - Huayi Fang
- School of Materials Science and Engineering Tianjin Key Lab for Rare Earth Materials and Applications Nankai University Tianjin 300350 P. R. China
| | - Ping Lu
- Department of Research Center for Molecular Recognition and Synthesis Department of Chemistry Fudan University 220 Handan Lu Shanghai 200433 P. R. China
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7
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Yan P, Zhong C, Zhang J, Liu Y, Fang H, Lu P. 3-(Methoxycarbonyl)Cyclobutenone as a Reactive Dienophile in Enantioselective Diels-Alder Reactions Catalyzed by Chiral Oxazaborolidinium Ions. Angew Chem Int Ed Engl 2021; 60:4609-4613. [PMID: 33201584 DOI: 10.1002/anie.202014308] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/16/2020] [Indexed: 11/06/2022]
Abstract
Cyclobutenone has been used as a highly reactive dienophile in Diels-Alder reactions, however, no enantioselective example has been reported. We disclose herein a chiral oxazaborolidine-aluminum bromide catalyzed enantioselective Diels-Alder reaction of 3-alkoxycarbonyl cyclobutenone with a variety of dienes. Furthermore, a total synthesis of (-)-kingianin F was completed for the first time via enantioenriched cycloadduct bicyclo[4.2.0]octane derivative.
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Affiliation(s)
- Peng Yan
- Department of Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, P. R. China
| | - Changxu Zhong
- Department of Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, P. R. China
| | - Jie Zhang
- College of Chemistry and Life, Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, P. R. China
| | - Yu Liu
- College of Chemistry and Life, Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, P. R. China
| | - Huayi Fang
- School of Materials Science and Engineering, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, Tianjin, 300350, P. R. China
| | - Ping Lu
- Department of Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai, 200433, P. R. China
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8
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He C, Han W, Cui B, Wan N, Chen Y. Efficient Assembly of Molecular Complexity Enabled by Palladium‐Catalyzed Heck Coupling/C(
sp
2
)−H Activation/ C(
sp
3
)−H Activation Cascade. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000488] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Chen He
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou ProvinceGeneric Drug Research Center of Guizhou ProvinceGreen Pharmaceuticals Engineering Research Center of Guizhou ProvinceSchool of PharmacyZunyi Medical University Zunyi 563006 People's Republic of China
| | - Wen‐Yong Han
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou ProvinceGeneric Drug Research Center of Guizhou ProvinceGreen Pharmaceuticals Engineering Research Center of Guizhou ProvinceSchool of PharmacyZunyi Medical University Zunyi 563006 People's Republic of China
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of EducationZunyi Medical University Zunyi 563006 People's Republic of China
| | - Bao‐Dong Cui
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou ProvinceGeneric Drug Research Center of Guizhou ProvinceGreen Pharmaceuticals Engineering Research Center of Guizhou ProvinceSchool of PharmacyZunyi Medical University Zunyi 563006 People's Republic of China
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of EducationZunyi Medical University Zunyi 563006 People's Republic of China
| | - Nan‐Wei Wan
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou ProvinceGeneric Drug Research Center of Guizhou ProvinceGreen Pharmaceuticals Engineering Research Center of Guizhou ProvinceSchool of PharmacyZunyi Medical University Zunyi 563006 People's Republic of China
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of EducationZunyi Medical University Zunyi 563006 People's Republic of China
| | - Yong‐Zheng Chen
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou ProvinceGeneric Drug Research Center of Guizhou ProvinceGreen Pharmaceuticals Engineering Research Center of Guizhou ProvinceSchool of PharmacyZunyi Medical University Zunyi 563006 People's Republic of China
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of EducationZunyi Medical University Zunyi 563006 People's Republic of China
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9
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Næsborg L, Jandl C, Zech A, Bach T. Complex Carbocyclic Skeletons from Aryl Ketones through a Three-Photon Cascade Reaction. Angew Chem Int Ed Engl 2020; 59:5656-5659. [PMID: 31868273 PMCID: PMC7687228 DOI: 10.1002/anie.201915731] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Indexed: 12/12/2022]
Abstract
Starting from readily available 7-substituted 1-indanones, products with a tetracyclo[5.3.1.01,7 04,11 ]undec-2-ene skeleton were obtained upon irradiation at λ=350 nm (eight examples, 49-67 % yield). The assembly of the structurally complex carbon framework proceeds in a three-photon process comprising an ortho photocycloaddition, a disrotatory [4π] photocyclization, and a di-π-methane rearrangement. The flat aromatic core of the starting material is converted into a functionalized polycyclic hydrocarbon with exit vectors in three dimensions. Ring opening reactions at the central cyclopropane ring were explored, which enable the preparation of tricyclo[5.3.1.04,11 ]undec-2-enes and of tricyclo[6.2.1.01,5 ]undecanes.
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Affiliation(s)
- Line Næsborg
- Department Chemie and Catalysis Research Center (CRC)Technische Universität MünchenLichtenbergstr. 485747GarchingGermany
| | - Christian Jandl
- Department Chemie and Catalysis Research Center (CRC)Technische Universität MünchenLichtenbergstr. 485747GarchingGermany
| | - Andreas Zech
- Department Chemie and Catalysis Research Center (CRC)Technische Universität MünchenLichtenbergstr. 485747GarchingGermany
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC)Technische Universität MünchenLichtenbergstr. 485747GarchingGermany
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10
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Næsborg L, Jandl C, Zech A, Bach T. Complex Carbocyclic Skeletons from Aryl Ketones through a Three‐Photon Cascade Reaction. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Line Næsborg
- Department Chemie and Catalysis Research Center (CRC) Technische Universität München Lichtenbergstr. 4 85747 Garching Germany
| | - Christian Jandl
- Department Chemie and Catalysis Research Center (CRC) Technische Universität München Lichtenbergstr. 4 85747 Garching Germany
| | - Andreas Zech
- Department Chemie and Catalysis Research Center (CRC) Technische Universität München Lichtenbergstr. 4 85747 Garching Germany
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC) Technische Universität München Lichtenbergstr. 4 85747 Garching Germany
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11
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Lan P, Ye S, Banwell MG. The Application of Dioxygenase-Based Chemoenzymatic Processes to the Total Synthesis of Natural Products. Chem Asian J 2020; 14:4001-4012. [PMID: 31609526 DOI: 10.1002/asia.201900988] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 09/18/2019] [Indexed: 12/14/2022]
Abstract
This Minireview describes the exploitation of certain enzymatically derived, readily accessible, and enantiomerically pure cis-1,2-dihydrocatechols as starting materials in the chemical synthesis of a range of biologically active natural products, most notably sesquiterpenoids and alkaloids.
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Affiliation(s)
- Ping Lan
- Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou, 510632, China
| | - Sebastian Ye
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT, 2601, Australia
| | - Martin G Banwell
- Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou, 510632, China.,Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT, 2601, Australia
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12
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Ciamician‐González‐Vorlesung: N. Martín / Premio a la excelencia investigadora: R. Fernández / Leibniz‐Preis: T. Bach. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Ciamician–González Lectureship: N. Martín / Premio a la excelencia investigadora: R. Fernández / Leibniz Prize: T. Bach. Angew Chem Int Ed Engl 2020; 59:533. [DOI: 10.1002/anie.201915394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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