1
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Roy CP, Karmakar S, Dash J. Synthesis of Phenanthrenes and 1-Hydroxyphenanthrenes via Aromatization-Assisted Ring-Closing Metathesis: toward Polynuclear Aromatic Hydrocarbons. J Org Chem 2024; 89:10511-10523. [PMID: 39007427 DOI: 10.1021/acs.joc.4c00723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
This study presents an efficient synthetic strategy for phenanthrenes and 1-hydroxyphenanthrenes through aromatization-assisted ring-closing metathesis (RCM). It involves vinylation of 1-bromo-2-naphthaldehyde derivatives, Barbier allylation, and subsequent one-pot RCM/dehydration of the diene precursors to yield phenanthrene derivatives. Further, the corresponding keto analogues of diene precursors produce 1-hydroxyphenanthrenes through RCM and aromatization-driven keto-enol tautomerism. This pathway enables rapid access to a diverse array of functionalized phenanthrenes and 1-hydroxyphenanthrenes, including synthetically challenging derivatives containing both -OH and -OMe groups via the sequential construction of the terminal phenanthrene ring.
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Affiliation(s)
- Charles Patriot Roy
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Shilpi Karmakar
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Jyotirmayee Dash
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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2
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Spence KA, Hoffmann M, Garg NK. Total Synthesis of Phenanthroindolizidines Using Strained Azacyclic Alkynes. Org Lett 2023; 25:5044-5048. [PMID: 37379230 PMCID: PMC10460089 DOI: 10.1021/acs.orglett.3c01740] [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: 06/30/2023]
Abstract
We report a concise approach to phenanthroindolizidine alkaloids, wherein strained azacyclic alkynes are intercepted in Pd-catalyzed annulations. Two types of strained intermediates were evaluated: a functionalized piperidyne and a new strained intermediate, an indolizidyne. We show that each can be employed, ultimately allowing access to three natural products: tylophorine, tylocrebine, and isotylocrebine. These efforts demonstrate the successful merger of strained azacyclic alkyne chemistry with transition-metal catalysis for the construction of complex heterocycles.
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Affiliation(s)
- Katie A Spence
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Marie Hoffmann
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Neil K Garg
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
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3
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The effect of diphenylethane side-chain substituents on dibenzocyclohexadiene formation and their inhibition of α-synuclein aggregation in vitro. Bioorg Med Chem 2023; 78:117147. [PMID: 36587551 DOI: 10.1016/j.bmc.2022.117147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/13/2022] [Accepted: 12/22/2022] [Indexed: 12/27/2022]
Abstract
The naturally-occurring di-catechol lignan nordihydroguaiaretic acid (NDGA) and an analog without methyl groups on the butyl linker both undergo intramolecular cyclization at pH 7.4 to form dibenzocyclooctadienes. Both NDGA and these dibenzocyclooctadienes have been shown to prevent in vitro aggregation of α-synuclein, an intrinsically disordered protein associated with Parkinson's disease. NDGA possesses two vicinal methyl groups on the butyl linker and the presence of these methyl groups attenuates the rate of intramolecular cyclization versus the unsubstituted analog, in opposition to the anticipated Thorpe-Ingold effect, likely due to steric repulsions during cyclization. Numerous 1,2-bis-ethane di-catechols are known to inhibit α-synuclein aggregation in vitro and we hypothesize that these compounds undergo a similar intramolecular cyclization and the cyclized products may be responsible for the activity. To test this hypothesis we prepared a series of 1,2-bis-ethane di-catechols with 0, 2 and 4 methyl substituents on the linker. We have confirmed that these compounds undergo intramolecular cyclization to form dibenzocyclohexadienes and that steric interactions between the methyl substituents leads to an increase in the rate of intramolecular cyclization, which is in contrast to what was observed for lignan di-catechols. The rate of cyclization to form six-membered rings is 10-30 times more rapid than formation of eight membered rings and the dibenzocyclohexadienes also prevent in vitro aggregation of α-synuclein.
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4
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Nanda SK, Mallik R. Transition Metal‐Catalyzed Carboamination of Alkenes and Allenes: Recent Progress. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100552] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Santosh Kumar Nanda
- Department of Chemistry, School of Applied Science Centurion University of Technology and Management Paralakhemundi Odisha 761211 India
| | - Rosy Mallik
- Department of Chemistry, School of Applied Science Centurion University of Technology and Management Paralakhemundi Odisha 761211 India
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5
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Alyabyev SB, Beletskaya IP. Gold as a catalyst. Part III. Addition to double bonds. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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6
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Khalifa A, Evans P. The Titanium-Mediated Double Reductive Cleavage of Cyclic Sulfonamides for the Synthesis of Aryl Pyrrolidines. J Org Chem 2019; 84:2969-2975. [PMID: 30681337 DOI: 10.1021/acs.joc.8b02827] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Reduction of a range of benzo-fused cyclic sulfonamides has been accomplished using low-valent titanium. This operationally simple method generates the corresponding aryl-substituted cyclic amines, typically, with good conversion. Notably, unlike our previous Li-NH3-based method, loss of heteroatom-based substituents (X) on the aromatic ring does not readily occur, and the robustness of this method was demonstrated with a synthesis of the Sceletium alkaloid mesembrane.
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Affiliation(s)
- Aisha Khalifa
- School of Chemistry, Center for Synthesis and Chemical Biology , University College Dublin , Dublin D04 N2E5 , Ireland
| | - Paul Evans
- School of Chemistry, Center for Synthesis and Chemical Biology , University College Dublin , Dublin D04 N2E5 , Ireland
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7
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Šafář P, Marchalín Š, Balónová B, Šoral M, Moncol J, Ghinet A, Rigo B, Daïch A. The Reactivity of Enantiopure (S
)-6-Oxopipecolic Acid and Corresponding Pyridoisoquinolines Under Acidic Conditions. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800908] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Peter Šafář
- Department of Organic Chemistry; Faculty of Chemical and Food Technology; Slovak University of Technology; 81237 Bratislava Slovakia
| | - Štefan Marchalín
- Department of Organic Chemistry; Faculty of Chemical and Food Technology; Slovak University of Technology; 81237 Bratislava Slovakia
- Normandie Univ.; UNILEHAVRE, FR 3038 CNRS, URCOM, 76600 Le Havre, France EA 3221, INC3M CNRS-FR 3038, UFR ST; BP: 1123; BP: 1123, 25 rue Philipe Lebon 76063 Le Havre Cedex France
| | - Barbora Balónová
- University of Kent School of Physical Sciences; Ingram 307 CT2 7NH Canterbury Kent UK
| | - Michal Šoral
- Central Laboratories; Faculty of Chemical and Food Technology; Slovak University of Technology; 81237 Bratislava Slovakia
| | - Ján Moncol
- Department of Inorganic Chemistry; Faculty of Chemical and Food Technology; Slovak University of Technology; 81237 Bratislava Slovakia
| | - Alina Ghinet
- HEI, Yncréa Hauts-de-France; Laboratoire de Pharmacochimie; 13 rue de Toul 59046 Lille France
- INSERM; U995-LIRIC; CHRU de Lile; Faculté de Médecine-Pôle Recherche Université Lille; U995-LIRIC, CHRU de Lille -59045 Lille France
- Alexandru Ioan Cuza' University of Iasi; Faculty of Chemistry; Bd. Carol I nr. 11 700506 Iasi Romania
| | - Benoît Rigo
- HEI, Yncréa Hauts-de-France; Laboratoire de Pharmacochimie; 13 rue de Toul 59046 Lille France
- INSERM; U995-LIRIC; CHRU de Lile; Faculté de Médecine-Pôle Recherche Université Lille; U995-LIRIC, CHRU de Lille -59045 Lille France
| | - Adam Daïch
- Normandie Univ.; UNILEHAVRE, FR 3038 CNRS, URCOM, 76600 Le Havre, France EA 3221, INC3M CNRS-FR 3038, UFR ST; BP: 1123; BP: 1123, 25 rue Philipe Lebon 76063 Le Havre Cedex France
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8
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Kou X, Shao Q, Ye C, Yang G, Zhang W. Asymmetric Aza-Wacker-Type Cyclization of N-Ts Hydrazine-Tethered Tetrasubstituted Olefins: Synthesis of Pyrazolines Bearing One Quaternary or Two Vicinal Stereocenters. J Am Chem Soc 2018; 140:7587-7597. [PMID: 29804449 DOI: 10.1021/jacs.8b02865] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We have developed an asymmetric aza-Wacker-type cyclization of N-Ts hydrazine-tethered tetrasubstituted olefins, affording optically active pyrazolines bearing chiral tetrasubstituted carbon stereocenters. This reaction is tolerant to a broad range of substrates under mild reaction conditions, giving the desired chiral products with high enantioselectivities. Generation of two vicinal stereocenters on the C═C double bonds was also achieved with high selectivities, a process which has been rarely studied for Wacker-type reactions. A mechanistic study revealed that this aza-Wacker-type cyclization undergoes a syn-aminopalladation process. It was also found that for substrates bearing two linear alkyl substituents on the outer carbon atom of the olefin, both of which are larger than a methyl group, the alkyl substituent that is cis to the intranucleophilic group participates more readily in β-hydride elimination. When one of the two alkyl substituents on the outer carbon atom of the olefin is a methyl group, β-hydride elimination proceeds selectively at the methylene side, thus both diastereomers can be prepared via switching the configuration of the olefin. Furthermore, the product can be converted to a pharmaceutical compound in high yields over three steps.
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Affiliation(s)
- Xuezhen Kou
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering , Shanghai Jiao Tong University , 800 Dongchuan Road , Shanghai 200240 , P. R. China
| | - Qihang Shao
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering , Shanghai Jiao Tong University , 800 Dongchuan Road , Shanghai 200240 , P. R. China
| | - Chenghao Ye
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering , Shanghai Jiao Tong University , 800 Dongchuan Road , Shanghai 200240 , P. R. China
| | - Guoqiang Yang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering , Shanghai Jiao Tong University , 800 Dongchuan Road , Shanghai 200240 , P. R. China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering , Shanghai Jiao Tong University , 800 Dongchuan Road , Shanghai 200240 , P. R. China
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9
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Li R, Liu CF, Yu CJ, Gu P. Total synthesis of ( R )-tylophorine by using an asymmetric hydrogenation of the allyl alcohol. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.04.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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10
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Groso EJ, Golonka AN, Harding RA, Alexander BW, Sodano TM, Schindler CS. 3-Aryl-2,5-Dihydropyrroles via Catalytic Carbonyl-Olefin Metathesis. ACS Catal 2018; 8:2006-2011. [PMID: 30276008 PMCID: PMC6162066 DOI: 10.1021/acscatal.7b03769] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein, we describe the development of a synthetic strategy towards chiral 3-pyrrolines based on the design principle of iron(III)-catalyzed carbonyl-olefin metathesis. This approach takes advantage of commercially available amino acids as chiral pool reagents and FeCl3 as a Lewis acid catalyst. Our strategy is characterized by its operational simplicity, mild reaction conditions and functional group tolerance. Investigations show that an electron-deficient nitrogen protecting group overcomes limitations arising from competitive binding of the Lewis acid catalyst to unfavorable Lewis basic sites, which ultimately enables catalytic turnover.
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Affiliation(s)
- Emilia J. Groso
- Department of Chemistry, Willard Henry Dow Laboratory, University of Michigan, 930 North University Ave., Ann Arbor, Michigan 48109, United States
| | - Alexander N. Golonka
- Department of Chemistry, Willard Henry Dow Laboratory, University of Michigan, 930 North University Ave., Ann Arbor, Michigan 48109, United States
| | - Ryan A. Harding
- Department of Chemistry, Willard Henry Dow Laboratory, University of Michigan, 930 North University Ave., Ann Arbor, Michigan 48109, United States
| | - Brandon W. Alexander
- Department of Chemistry, Willard Henry Dow Laboratory, University of Michigan, 930 North University Ave., Ann Arbor, Michigan 48109, United States
| | - Taylor M. Sodano
- Department of Chemistry, Willard Henry Dow Laboratory, University of Michigan, 930 North University Ave., Ann Arbor, Michigan 48109, United States
| | - Corinna S. Schindler
- Department of Chemistry, Willard Henry Dow Laboratory, University of Michigan, 930 North University Ave., Ann Arbor, Michigan 48109, United States
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11
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Chemler SR, Karyakarte SD, Khoder ZM. Stereoselective and Regioselective Synthesis of Heterocycles via Copper-Catalyzed Additions of Amine Derivatives and Alcohols to Alkenes. J Org Chem 2017; 82:11311-11325. [PMID: 28910106 DOI: 10.1021/acs.joc.7b02072] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
This Perspective describes the development of a family of copper(II)-catalyzed alkene difunctionalization reactions that enable stereoselective addition of amine derivatives and alcohols onto pendant unactivated alkenes to provide a range of valuable saturated nitrogen and oxygen heterocycles. 2-Vinylanilines and related substrates undergo alternative oxidative amination or allylic amination pathways, and these reactions will also be discussed. The involvement of both polar and radical steps in the reaction mechanisms have been implicated. Major product formation is a function of the lowest energy pathway, which in turn is a function of structural aspects of the various reaction components.
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Affiliation(s)
- Sherry R Chemler
- Department of Chemistry, State University of New York at Buffalo , Buffalo, New York 14260, United States
| | - Shuklendu D Karyakarte
- Department of Chemistry, State University of New York at Buffalo , Buffalo, New York 14260, United States
| | - Zainab M Khoder
- Department of Chemistry, State University of New York at Buffalo , Buffalo, New York 14260, United States
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12
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Miyabe H. Unique Strategies for Controlling Enantioselective Stereochemistry of Cyclizations via Radical Intermediates. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700036] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Hideto Miyabe
- School of Pharmacy; Hyogo University of Health Sciences; 650-8530 Minatojima, Chuo-ku Kobe Japan
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13
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Yamaoka Y. Efficient Synthesis of Polyaromatic Hydrocarbon <i>via</i> a Formal [2+2] Cycloaddition. YAKUGAKU ZASSHI 2016; 136:1517-1523. [DOI: 10.1248/yakushi.16-00202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yousuke Yamaoka
- Graduate School of Pharmaceutical Sciences, Kyoto University
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14
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Liu GQ, Reimann M, Opatz T. Total Synthesis of Phenanthroindolizidine Alkaloids by Combining Iodoaminocyclization with Free Radical Cyclization. J Org Chem 2016; 81:6142-8. [PMID: 27314476 DOI: 10.1021/acs.joc.6b01161] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gong-Qing Liu
- Institute
of Organic Chemistry, Johannes Gutenberg University, Duesbergweg
10−14, 55128 Mainz, Germany
| | - Marcel Reimann
- Institute
of Organic Chemistry, Johannes Gutenberg University, Duesbergweg
10−14, 55128 Mainz, Germany
| | - Till Opatz
- Institute
of Organic Chemistry, Johannes Gutenberg University, Duesbergweg
10−14, 55128 Mainz, Germany
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15
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Gupta V, Rao VUB, Das T, Vanka K, Singh RP. Intramolecular Dehydrogenative Coupling of 2,3-Diaryl Acrylic Compounds: Access to Substituted Phenanthrenes. J Org Chem 2016; 81:5663-9. [PMID: 27232691 DOI: 10.1021/acs.joc.6b00507] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A simple, facile, and environmentally benign intramolecular dehydrogenative coupling of various 1,2-diarylethylenes for the synthesis of phenanthrenes in excellent yield has been described. This new methodology uses ceric ammonium nitrate (CAN) as a promoter at room temperature and has been extended to intermolecular synthesis of biaryl compounds. The electron transfer from methoxyarene to cerium leads to cationic radical formation, which further proceeds to intramolecular coupling. Preliminary mechanistic investigation by EPR spectroscopy and density functional theory calculation suggested a similar view.
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Affiliation(s)
- Vijay Gupta
- Department of Chemistry, Indian Institute of Technology , Delhi, Hauz Khas, New Delhi, 110016, India
| | - V U Bhaskara Rao
- Department of Chemistry, Indian Institute of Technology , Delhi, Hauz Khas, New Delhi, 110016, India
| | - Tamal Das
- Physical and Materials Chemistry Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India
| | - Kumar Vanka
- Physical and Materials Chemistry Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India
| | - Ravi P Singh
- Department of Chemistry, Indian Institute of Technology , Delhi, Hauz Khas, New Delhi, 110016, India
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16
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Mailyan AK, Eickhoff JA, Minakova AS, Gu Z, Lu P, Zakarian A. Cutting-Edge and Time-Honored Strategies for Stereoselective Construction of C–N Bonds in Total Synthesis. Chem Rev 2016; 116:4441-557. [DOI: 10.1021/acs.chemrev.5b00712] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Artur K. Mailyan
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - John A. Eickhoff
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Anastasiia S. Minakova
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Zhenhua Gu
- Department
of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Ping Lu
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Armen Zakarian
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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17
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Anton-Torrecillas C, Loza MI, Brea J, Gonzalez-Gomez JC. Concise asymmetric syntheses of novel phenanthroquinolizidines. Org Biomol Chem 2016; 14:2264-71. [PMID: 26790584 DOI: 10.1039/c5ob02624e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The first preparation of enantioenriched phenanthroquinolizidines with a quaternary center at C14a was accomplished in seven steps from readily available starting materials. Key steps were an efficient dynamic kinetic allylation of a diastereomeric mixture of chiral tert-butylsulfinyl ketimines and the construction of a piperidine E ring by rhodium catalyzed hydroformylation. The Stevens rearrangement of the corresponding N-benzyl derivatives took place smoothly, allowing the installation of a benzyl moiety at C9 in a trans relationship with the methyl group. The cytoxicity of the prepared phenanthroquinolizidines was evaluated against different human cancer cell lines.
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Affiliation(s)
- Cintia Anton-Torrecillas
- Departamento de Química Orgánica, Facultad de Ciencias and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain.
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18
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Anton-Torrecillas C, Gonzalez-Gomez JC. Short asymmetric synthesis of phenanthroindolizidines through chiral homoallylic sulfinamines. Org Biomol Chem 2015; 12:7018-25. [PMID: 25070561 DOI: 10.1039/c4ob01133c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An efficient stereocontrolled preparation of chiral phenanthroindolizidines is detailed. The synthesis relies on the stereoselective indium-mediated allylation of 2-(phenanthren-9-yl)acetaldehyde derivatives with chiral tert-butylsulfinamide. Chemoselective transformations from the corresponding homoallylic sulfinamine allow the synthesis of the phenanthroindolizidines in only three synthetic operations, without any detectable racemization. Following this procedure, the synthesis of natural (-)-tylophorine was successfully accomplished.
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Affiliation(s)
- Cintia Anton-Torrecillas
- Departamento de Química Orgánica, Facultad de Ciencias and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain.
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19
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Anton-Torrecillas C, Bosque I, Gonzalez-Gomez JC, Loza MI, Brea J. Syntheses and Cytotoxicity of (R)- and (S)-7-Methoxycryptopleurine. J Org Chem 2015; 80:1284-90. [DOI: 10.1021/jo502660r] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Cintia Anton-Torrecillas
- Departamento
de Química Orgánica, Facultad de Ciencias and Instituto
de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | - Irene Bosque
- Departamento
de Química Orgánica, Facultad de Ciencias and Instituto
de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | - Jose C. Gonzalez-Gomez
- Departamento
de Química Orgánica, Facultad de Ciencias and Instituto
de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | - María Isabel Loza
- Grupo
de Investigación Biofarma, USEF Screening Platform, Centro
de Investigación en Medicina Molecular y Enfermedades Crónicas
(CIMUS), Universidad de Santiago de Compostela, Avda de Barcelona s/n, Santiago de Compostela, Spain
| | - José Brea
- Grupo
de Investigación Biofarma, USEF Screening Platform, Centro
de Investigación en Medicina Molecular y Enfermedades Crónicas
(CIMUS), Universidad de Santiago de Compostela, Avda de Barcelona s/n, Santiago de Compostela, Spain
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20
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Wehming K, Schubert M, Schnakenburg G, Waldvogel SR. Oxidative Cyclization Reaction of 2-Aryl-Substituted Cinnamates To Form Phenanthrene Carboxylates by Using MoCl5. Chemistry 2014; 20:12463-9. [DOI: 10.1002/chem.201403442] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Indexed: 12/12/2022]
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21
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Zheng Y, Liu Y, Wang Q. Collective Asymmetric Synthesis of (−)-Antofine, (−)-Cryptopleurine, (−)-Tylophorine, and (−)-Tylocrebrine with tert-Butanesulfinamide as a Chiral Auxiliary. J Org Chem 2014; 79:3348-57. [DOI: 10.1021/jo500013e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Yanlong Zheng
- State Key Laboratory of Elemento-Organic
Chemistry, Research Institute of Elemento-Organic Chemistry, Collaborative
Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People’s Republic of China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic
Chemistry, Research Institute of Elemento-Organic Chemistry, Collaborative
Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People’s Republic of China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic
Chemistry, Research Institute of Elemento-Organic Chemistry, Collaborative
Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People’s Republic of China
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22
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Dang L, Liang L, Qian C, Fu M, Ma T, Xu D, Jiang H, Zeng W. Cu(OAc)2-Promoted Cascade Carboamination/Oxidative Cyclization of C-Acylimines with Alkenes. J Org Chem 2014; 79:769-76. [DOI: 10.1021/jo402705w] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ling Dang
- School of Chemistry
and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Libo Liang
- School of Chemistry
and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Cheng Qian
- School of Chemistry
and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Meiqin Fu
- School of Chemistry
and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Tongmei Ma
- School of Chemistry
and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Dingguo Xu
- College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Huanfeng Jiang
- School of Chemistry
and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Wei Zeng
- School of Chemistry
and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
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23
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Majumdar KC, Sinha B. Coinage metals (Cu, Ag and Au) in the synthesis of natural products. RSC Adv 2014. [DOI: 10.1039/c3ra44336a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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24
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Su B, Zhang H, Deng M, Wang Q. An enantioselective strategy for the total synthesis of (S)-tylophorine via catalytic asymmetric allylation and a one-pot DMAP-promoted isocyanate formation/Lewis acid catalyzed cyclization sequence. Org Biomol Chem 2014; 12:3616-21. [DOI: 10.1039/c4ob00200h] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A novel total synthesis of (S)-tylophorine is reported, featuring asymmetric allylation and cascade isocyanate formation and cyclization.
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Affiliation(s)
- Bo Su
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071, People's Republic of China
| | - Hui Zhang
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071, People's Republic of China
| | - Meng Deng
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071, People's Republic of China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071, People's Republic of China
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25
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Deng M, Su B, Zhang H, Liu Y, Wang Q. Total synthesis of phenanthroindolizidine alkaloids via asymmetric deprotonation of N-Boc-pyrrolidine. RSC Adv 2014. [DOI: 10.1039/c3ra47465h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
A concise synthesis of two typical phenanthroindolizidine alkaloids via an asymmetric deprotonation/diastereoselective carbonyl addition strategy is described.
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Affiliation(s)
- Meng Deng
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Tianjin 300071, People's Republic of China
| | - Bo Su
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Tianjin 300071, People's Republic of China
| | - Hui Zhang
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Tianjin 300071, People's Republic of China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Tianjin 300071, People's Republic of China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Tianjin 300071, People's Republic of China
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26
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27
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Brown AR, Uyeda C, Brotherton CA, Jacobsen EN. Enantioselective thiourea-catalyzed intramolecular cope-type hydroamination. J Am Chem Soc 2013; 135:6747-9. [PMID: 23597402 PMCID: PMC3689223 DOI: 10.1021/ja402893z] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Catalysis of Cope-type rearrangements of bis-homoallylic hydroxylamines is demonstrated using chiral thiourea derivatives. This formal intramolecular hydroamination reaction provides access to highly enantioenriched α-substituted pyrrolidine products and represents a complementary approach to metal-catalyzed methods.
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Affiliation(s)
- Adam R. Brown
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Christopher Uyeda
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Carolyn A. Brotherton
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Eric N. Jacobsen
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
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28
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29
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Geoghegan K, Evans P. Double Reduction of Cyclic Aromatic Sulfonamides: Synthesis of (+)-Mesembrine and (+)-Mesembranol. J Org Chem 2013; 78:3410-5. [DOI: 10.1021/jo4000306] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Kimberly Geoghegan
- Centre for Synthesis and
Chemical Biology, School of
Chemistry and Chemical Biology, University College Dublin, Dublin 4, Ireland
| | - Paul Evans
- Centre for Synthesis and
Chemical Biology, School of
Chemistry and Chemical Biology, University College Dublin, Dublin 4, Ireland
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30
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Stoye A, Peez TE, Opatz T. Left, right, or both? On the configuration of the phenanthroindolizidine alkaloid tylophorine from Tylophora indica. JOURNAL OF NATURAL PRODUCTS 2013; 76:275-278. [PMID: 23369033 DOI: 10.1021/np300838w] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The alkaloid (-)-tylophorine was isolated from a sample of Tylophora indica, and the crude extract was analyzed by HPLC/MS(n) and chiral HPLC/MS. While the literature states that the naturally occurring form of this alkaloid is the R-enantiomer and that its S-antipode is usually not found in nature, we confirmed the hypothesis of Govindachari and Nagarajan that natural levorotatory tylophorine is indeed a nearly racemic mixture with a slight excess of the R-enantiomer.
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Affiliation(s)
- Alexander Stoye
- Institute of Organic Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, Mainz, Germany
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31
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Synthesis of Saturated Heterocycles via Metal-Catalyzed Alkene Carboamination or Carboalkoxylation Reactions. TOPICS IN HETEROCYCLIC CHEMISTRY 2013. [DOI: 10.1007/7081_2012_98] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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32
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Wang X, Fu JM, Snieckus V. Directed MetalationCross-Coupling Strategies. Total Syntheses of the Alleged and the Revised Phenanthrene Natural Product Gymnopusin. Helv Chim Acta 2012. [DOI: 10.1002/hlca.201200564] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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33
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Lin YD, Cho CL, Ko CW, Pulte A, Wu YT. Palladium-catalyzed annulation of 2,2'-diiodobiphenyls with alkynes: synthesis and applications of phenanthrenes. J Org Chem 2012; 77:9979-88. [PMID: 23078637 DOI: 10.1021/jo302013x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A range of phenanthrene derivatives were efficiently synthesized by the palladium-catalyzed annulation of 2,2'-diiodobiphenyls with alkynes. The scope, limitations and regioselectivity of the reaction were investigated. The described method was adopted to synthesize 9,10-dialkylphenanthrenes, sterically overcrowded 4,5-disubstituted phenanthrenes and phenanthrene-based alkaloids. Reactions of highly methoxy-substituted biphenyls with 2-(2-propynyl)pyrrolidine and 2-(2-propynyl)piperidine gave 2-(9-phenanthylmethyl)pyrrolidines and 2-(9-phenanthylmethyl)piperidines, respectively. The products were transformed to phenanthroindolizidine and phenanthroquinolizidine alkaloids by the Pictet-Spengler reaction.
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Affiliation(s)
- Yu-De Lin
- Department of Chemistry, National Cheng Kung University, No. 1 Ta-Hsueh Road, 70101 Tainan, Taiwan
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34
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Niphakis MJ, Gay BC, Hong KH, Bleeker NP, Georg GI. Synthesis and evaluation of the anti-proliferative and NF-κB activities of a library of simplified tylophorine analogs. Bioorg Med Chem 2012; 20:5893-900. [DOI: 10.1016/j.bmc.2012.07.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2012] [Revised: 07/14/2012] [Accepted: 07/24/2012] [Indexed: 01/20/2023]
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35
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Medina F, Michon C, Agbossou-Niedercorn F. Intermolecular Mono- and Dihydroamination of Activated Alkenes Using a Recoverable Gold Catalyst. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200891] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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36
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Xu X, Liu Y, Park CM. Rhodium(III)-catalyzed intramolecular annulation through C-H activation: total synthesis of (±)-antofine, (±)-septicine, (±)-tylophorine, and rosettacin. Angew Chem Int Ed Engl 2012; 51:9372-6. [PMID: 22907635 DOI: 10.1002/anie.201204970] [Citation(s) in RCA: 254] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Indexed: 11/07/2022]
Affiliation(s)
- Xianxiu Xu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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37
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Xu X, Liu Y, Park CM. Rhodium(III)-Catalyzed Intramolecular Annulation through CH Activation: Total Synthesis of (±)-Antofine, (±)-Septicine, (±)-Tylophorine, and Rosettacin. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201204970] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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38
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Lahm G, Stoye A, Opatz T. A Five-Step Synthesis of (±)-Tylophorine via a Nitrile-Stabilized Ammonium Ylide. J Org Chem 2012; 77:6620-3. [DOI: 10.1021/jo3011045] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Günther Lahm
- Institute
of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Alexander Stoye
- Institute
of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Till Opatz
- Institute
of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
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39
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Barrett TN, Braddock DC, Monta A, Webb MR, White AJP. Total synthesis of the marine metabolite (±)-polysiphenol via highly regioselective intramolecular oxidative coupling. JOURNAL OF NATURAL PRODUCTS 2011; 74:1980-1984. [PMID: 21875052 DOI: 10.1021/np200596q] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
(±)-Polysiphenol (1), an atropisomerically stable 4,5-dibrominated 9,10-dihydrophenanthrene from Polysiphonia ferulacea, was prepared by a biomimetically inspired highly regioselective intramolecular oxidative coupling of a dibrominated dihydrostilbene. The installation of the two bromine atoms prior to oxidative coupling prevents further oxidation to a planar aromatized phenanthrene. By this strategy, the synthesis of (±)-polysiphenol was achieved in four steps in 70% overall yield. Synthesis of the naturally occurring 5,5'-(ethane-1,2-diyl)bis(3-bromobenzene-1,2-diol) (2) (the likely biogenetic precursor of polysiphenol) and 5,5'-(ethane-1,2-diyl)bis(3,4,6-tribromobenzene-1,2-diol) (9) are also reported. The origins of the regioselectivity in the oxidative coupling are explored.
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Affiliation(s)
- Tim N Barrett
- Department of Chemistry, Imperial College London, London, South Kensington SW7 2AZ, UK
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40
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Hsu SF, Ko CW, Wu YT. Cobalt-Catalyzed Carbon-Carbon Bond Formation: Synthesis and Applications of Enantiopure Pyrrolidine Derivatives[1]. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100220] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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Abstract
Copper(II) carboxylates and chiral copper(II) triflate·bis(oxazoline) complexes promote and catalyze intramolecular alkene carboamination, diamination and aminooxygenation reactions, creating an array of nitrogen heterocycles. High diastereoselectivity and enantioselectivity can be achieved in these transformations. This account reviews the discovery and development of these useful and interesting reactions.
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Affiliation(s)
- Sherry R Chemler
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, NY 14260, USA
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42
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Radicals in transition metal catalyzed reactions? transition metal catalyzed radical reactions?: a fruitful interplay anyway: part 3: catalysis by group 10 and 11 elements and bimetallic catalysis. Top Curr Chem (Cham) 2011; 320:323-451. [PMID: 22143611 DOI: 10.1007/128_2011_288] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review summarizes the current status of transition metal catalyzed reactions involving radical intermediates in organic chemistry. This part focuses on radical-based methods catalyzed by group 10 and group 11 metal complexes. Reductive and redox-neutral C-C bond formations catalyzed by low-valent metal complexes as well as catalytic oxidative methods are reviewed. Catalytic processes which rely on the combination of two metal complexes are also covered.
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43
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Mai DN, Wolfe JP. Asymmetric palladium-catalyzed carboamination reactions for the synthesis of enantiomerically enriched 2-(arylmethyl)- and 2-(alkenylmethyl)pyrrolidines. J Am Chem Soc 2010; 132:12157-9. [PMID: 20718417 DOI: 10.1021/ja106989h] [Citation(s) in RCA: 171] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The enantioselective synthesis of 2-(arylmethyl)- and 2-(alkenylmethyl)pyrrolidine derivatives via Pd-catalyzed alkene carboamination reactions is described. These transformations generate enantiomerically enriched products with up to 94% ee from readily available alkenyl or aryl bromides and N-boc-pent-4-enylamines. The application of this method to a concise asymmetric synthesis of (-)-tylophorine is also discussed.
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Affiliation(s)
- Duy N Mai
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, USA
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44
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Michon C, Medina F, Capet F, Roussel P, Agbossou-Niedercorn F. Inter- and Intramolecular Hydroamination of Unactivated Alkenes Catalysed by a Combination of Copper and Silver Salts: The Unveiling of a Brønstedt Acid Catalysis. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000536] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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45
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Massah AR, Ross AJ, Jackson RFW. In Situ trapping of Boc-2-pyrrolidinylmethylzinc Iodide with Aryl Iodides: Direct Synthesis of 2-Benzylpyrrolidines. J Org Chem 2010; 75:8275-8. [DOI: 10.1021/jo101503p] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ahmad Reza Massah
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Andrew J. Ross
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Richard F. W. Jackson
- Department of Chemistry, The University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
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46
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Yang CW, Lee YZ, Kang IJ, Barnard DL, Jan JT, Lin D, Huang CW, Yeh TK, Chao YS, Lee SJ. Identification of phenanthroindolizines and phenanthroquinolizidines as novel potent anti-coronaviral agents for porcine enteropathogenic coronavirus transmissible gastroenteritis virus and human severe acute respiratory syndrome coronavirus. Antiviral Res 2010; 88:160-8. [PMID: 20727913 PMCID: PMC7114283 DOI: 10.1016/j.antiviral.2010.08.009] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 08/07/2010] [Accepted: 08/12/2010] [Indexed: 11/28/2022]
Abstract
The discovery and development of new, highly potent anti-coronavirus agents and effective approaches for controlling the potential emergence of epidemic coronaviruses still remains an important mission. Here, we identified tylophorine compounds, including naturally occurring and synthetic phenanthroindolizidines and phenanthroquinolizidines, as potent in vitro inhibitors of enteropathogenic coronavirus transmissible gastroenteritis virus (TGEV). The potent compounds showed 50% maximal effective concentration (EC₅₀) values ranging from 8 to 1468 nM as determined by immunofluorescent assay of the expression of TGEV N and S proteins and by real time-quantitative PCR analysis of viral yields. Furthermore, the potent tylophorine compounds exerted profound anti-TGEV replication activity and thereby blocked the TGEV-induced apoptosis and subsequent cytopathic effect in ST cells. Analysis of the structure-activity relations indicated that the most active tylophorine analogues were compounds with a hydroxyl group at the C14 position of the indolizidine moiety or at the C3 position of the phenanthrene moiety and that the quinolizidine counterparts were more potent than indolizidines. In addition, tylophorine compounds strongly reduced cytopathic effect in Vero 76 cells induced by human severe acute respiratory syndrome coronavirus (SARS CoV), with EC₅₀ values ranging from less than 5 to 340 nM. Moreover, a pharmacokinetic study demonstrated high and comparable oral bioavailabilities of 7-methoxycryptopleurine (52.7%) and the naturally occurring tylophorine (65.7%) in rats. Thus, our results suggest that tylophorine compounds are novel and potent anti-coronavirus agents that may be developed into therapeutic agents for treating TGEV or SARS CoV infection.
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Affiliation(s)
- Cheng-Wei Yang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Miaoli, Taiwan, ROC
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47
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Cui M, Song H, Feng A, Wang Z, Wang Q. Asymmetric Synthesis of (R)-Antofine and (R)-Cryptopleurine via Proline-Catalyzed Sequential α-Aminoxylation and Horner−Wadsworth−Emmons Olefination of Aldehyde. J Org Chem 2010; 75:7018-21. [DOI: 10.1021/jo101510x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Mingbo Cui
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Hongjian Song
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Anzheng Feng
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Ziwen Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
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48
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Dangerfield EM, Plunkett CH, Win-Mason AL, Stocker BL, Timmer MSM. Protecting-Group-Free Synthesis of Amines: Synthesis of Primary Amines from Aldehydes via Reductive Amination. J Org Chem 2010; 75:5470-7. [DOI: 10.1021/jo100004c] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Emma M. Dangerfield
- Malaghan Institute of Medical Research, PO Box 7060, Wellington, New Zealand
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
| | - Catherine H. Plunkett
- Malaghan Institute of Medical Research, PO Box 7060, Wellington, New Zealand
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
| | - Anna L. Win-Mason
- Malaghan Institute of Medical Research, PO Box 7060, Wellington, New Zealand
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
| | - Bridget L. Stocker
- Malaghan Institute of Medical Research, PO Box 7060, Wellington, New Zealand
| | - Mattie S. M. Timmer
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
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49
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Yang X, Shi Q, Bastow KF, Lee KH. Antitumor agents. 274. A new synthetic strategy for E-ring SAR study of antofine and cryptopleurine analogues. Org Lett 2010; 12:1416-9. [PMID: 20196574 DOI: 10.1021/ol902819j] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new versatile synthetic methodology for the synthesis of enantiomerically pure natural phenanthroindolizidines and phenanthroquinolizidines has been established and described. Natural products R-antofine and R-cryptopleurine, as well as a novel E-ring expanded analogue 13c (E7), 12-oxo-S-antofine (17), and 12N-methyl-12-aza-S-antofine (18) were synthesized with the new method. This strategy will greatly facilitate future SAR studies on the natural alkaloids with E-ring variations.
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Affiliation(s)
- Xiaoming Yang
- Natural Products Research Laboratories, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599-7568, USA
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50
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Total synthesis of the tylophora alkaloids rusplinone, 13aα-secoantofine, and antofine using a multicatalytic oxidative aminochlorocarbonylation/Friedel–Crafts reaction. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.03.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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