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Tan S, Zard SZ, Pham LN, Coote ML, Banwell MG, Lan P, White LV. Short Formal Syntheses of Lycorine and Congeners Using a 5 -Endo-Trig/6 -Endo-Trig Radical Cyclization Sequence. Org Lett 2024; 26:4292-4296. [PMID: 38728657 DOI: 10.1021/acs.orglett.4c01271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2024]
Abstract
Here, we report a practical route to medicinally interesting lycorine congeners alongside formal syntheses of various lycorine-type natural products, including lycorine itself. The efficiency of our strategy derives from a back-to-back 5-endo-trig/6-endo-trig radical cyclization sequence, which we systematically studied both experimentally and computationally. The results of our work will facilitate future development of urgently needed antiviral therapeutics based on lycorine.
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Affiliation(s)
- Shen Tan
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou, Guangdong 510632, China
- Laboratoire de Synthèse Organique, CNRS, École Polytechnique, Palaiseau 91128, France
| | - Samir Z Zard
- Laboratoire de Synthèse Organique, CNRS, École Polytechnique, Palaiseau 91128, France
| | - Le Nhan Pham
- Institute for Nanoscale Science and Technology, College of Science and Engineering, Flinders University, Adelaide, South Australia 5042, Australia
| | - Michelle L Coote
- Institute for Nanoscale Science and Technology, College of Science and Engineering, Flinders University, Adelaide, South Australia 5042, Australia
| | - Martin G Banwell
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou, Guangdong 510632, China
| | - Ping Lan
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou, Guangdong 510632, China
| | - Lorenzo V White
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou, Guangdong 510632, China
- Laboratoire de Synthèse Organique, CNRS, École Polytechnique, Palaiseau 91128, France
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2
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Bautista DD, Reyes MAV, González EAB, Bugarin A. Synthetic Approaches to α-, β-, γ-, and δ-lycoranes. European J Org Chem 2023; 26:e202300404. [PMID: 37927304 PMCID: PMC10624333 DOI: 10.1002/ejoc.202300404] [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: 04/27/2023] [Indexed: 11/07/2023]
Abstract
Lycorane is a pentacyclic core presented in alkaloids isolated from the Amaryllidaceae family of herbaceous flowering plants. Members of this class of natural products have shown to display important biological properties including analgesic, antiviral, and antiproliferative activities. This review presents the known synthetic routes toward α-, β-, γ-, and δ-lycoranes. α-(19 routes), β-(10 routes), γ-(38 routes), and δ-(6 routes).
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Affiliation(s)
- Diego Díaz Bautista
- Universidad Juárez Autónoma de Tabasco, Division Académica de Ciencias Básicas, carretera Cunduacán-Jalpa Km. 0.5, Cunduacán Tabasco 86690, México
| | - Miguel A Vilchis Reyes
- Universidad Juárez Autónoma de Tabasco, Division Académica de Ciencias Básicas, carretera Cunduacán-Jalpa Km. 0.5, Cunduacán Tabasco 86690, México
| | - Ever A Blé González
- Universidad Juárez Autónoma de Tabasco, Division Académica de Ciencias Básicas, carretera Cunduacán-Jalpa Km. 0.5, Cunduacán Tabasco 86690, México
- Department of Chemistry and Physics, Florida Gulf Coast University, 10501 FGCU Boulevard South, Fort Myers, FL, 33965
| | - Alejandro Bugarin
- Department of Chemistry and Physics, Florida Gulf Coast University, 10501 FGCU Boulevard South, Fort Myers, FL, 33965
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3
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Hall CJJ, Marriott IS, Christensen KE, Day AJ, Goundry WRF, Donohoe TJ. Extension of hydrogen borrowing alkylation reactions for the total synthesis of (-)-γ-lycorane. Chem Commun (Camb) 2022; 58:4966-4968. [PMID: 35348143 DOI: 10.1039/d2cc01248k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The total synthesis of (-)-γ-lycorane (10 steps) and synthesis of (±)-γ-lycorane (8 steps) was completed from cyclohexenone. A new two step hydrogen borrowing alkylation of an aziridinyl alcohol, coupled with a Ph* (Me5C6) deprotection/cyclisation procedure was developed for de novo formation of the fused 6,5 heterocyclic ring. This work is one of the first examples of hydrogen borrowing C-C bond formation being used as a key step in a total synthesis project.
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Affiliation(s)
- Christopher J J Hall
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK.
| | - Indi S Marriott
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK.
| | - Kirsten E Christensen
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK.
| | - Aaron J Day
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK.
| | - William R F Goundry
- Early Chemical Development, Pharmaceutical Sciences, R&D, AstraZeneca, Macclesfield, UK
| | - Timothy J Donohoe
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK.
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Wilson KB, Nedzbala HS, Simpson SR, Ericson MN, Westendorff KS, Chordia MD, Dickie DA, Harman WD. Hydroamination of Dihapto-Coordinated Benzene and Diene Complexes of Tungsten: Fundamental Studies and the Synthesis of γ-Lycorane. Helv Chim Acta 2022; 104. [PMID: 35125509 DOI: 10.1002/hlca.202100103] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Reactions are described for complexes of the form WTp(NO)(PMe3)(η2-arene) and various amines, where the arene is benzene or benzene with an electron-withdrawing substituent (CF3, SO2Ph, SO2Me). The arene complex is first protonated to form an η2-arenium species, which then selectively adds the amine. The resulting η2-5-amino-1,3-cyclohexadiene complexes can then be subjected to the same sequence with a second nucleophile to form 3-aminocyclohexene complexes, where up to three stereocenters originate from the arene carbons. Alternatively, 1,3-cyclohexadiene complexes containing an ester group at the 5 position (also prepared from an arene) can be treated with acid followed by an amine to form trisubstituted 3-aminocyclohexenes. When the amine is primary, ring closure can occur to form a cis-fused bicyclic γ-lactam. Highly functionalized cyclohexenes can be liberated from the tungsten through oxidative decomplexation. The potential utility of this methodology is demonstrated in the synthesis of the alkaloid γ-lycorane. An enantioenriched synthesis of a lactam precursor to γ-lycorane is also described. This compound is prepared from an enantioenriched version of the tungsten benzene complex. Regio- and stereochemical assignments for the reported compounds are supported by detailed 2D-NMR analysis and 13 molecular structure determinations (SC-XRD).
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Affiliation(s)
- Katy B Wilson
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - Hannah S Nedzbala
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - Spenser R Simpson
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - Megan N Ericson
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - Karl S Westendorff
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - Mahendra D Chordia
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - Diane A Dickie
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - W Dean Harman
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
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5
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Uphade MB, Prasad KR. Total synthesis of (+)-γ-lycorane from ethyl lactate using iterative Claisen and Overman rearrangement reactions. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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A concise total synthesis of (−)-γ-lycorane via an aromatic C H alkylation of unactivated secondary alkyl iodide. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151733] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Wahl MH, Jandl C, Bach T. A [2 + 2] Photocycloaddition–Fragmentation Approach toward the Carbon Skeleton of cis-Fused Lycorine-type Alkaloids. Org Lett 2018; 20:7674-7678. [DOI: 10.1021/acs.orglett.8b03402] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Maike H. Wahl
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany
| | - Christian Jandl
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany
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Lankri D, Albarghouti G, Mahameed M, Tsvelikhovsky D. Multifaceted α-Enaminone: Adaptable Building Block for Synthesis of Heterocyclic Scaffolds Through Conceptually Distinct 1,2-, 1,3-, 1,4-, and C-O Bond Forming Annulations. J Org Chem 2017. [PMID: 28627896 DOI: 10.1021/acs.joc.7b00516] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The new reactivity of α,β-unsaturated enaminones driven by their "dual electronic attitude" is reported. We introduce unexplored, α-enaminone synthones and reveal the unusual functionalities of these building blocks. The feasibility of this new concept is demonstrated in the direct functionalization of enaminone precursors, such as alkylation; 1,2- 1,3-, or 1,4-addition; and C-O bond formation. The general and potential applicability is presented through the collective synthesis of several important classes of heterocycles via controlled cyclizations of easily accessible common precursors. The rapid composition of novel key α-enaminone synthones yields an assembly of oxazines, azaspirones, quinolinones, and quinolinols in a regio- and chemoselective fashion.
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Affiliation(s)
- David Lankri
- The Institute for Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem , Jerusalem 91120, Israel
| | - Ghassan Albarghouti
- The Institute for Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem , Jerusalem 91120, Israel
| | - Mohamed Mahameed
- The Institute for Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem , Jerusalem 91120, Israel
| | - Dmitry Tsvelikhovsky
- The Institute for Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem , Jerusalem 91120, Israel
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9
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Monaco A, Szulc BR, Rao ZX, Barniol-Xicota M, Sehailia M, Borges BMA, Hilton ST. Short Total Synthesis of (±)-γ-Lycorane by a Sequential Intramolecular Acylal Cyclisation (IAC) and Intramolecular Heck Addition Reaction. Chemistry 2017; 23:4750-4755. [PMID: 28217842 DOI: 10.1002/chem.201700143] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Indexed: 01/23/2023]
Abstract
An intramolecular acylal cyclisation (IAC) approach to the synthesis of a range of bicyclic heterocycles is reported. As an example of the utility of the IAC reaction, the methodology was applied in a protecting-group-free five-step total synthesis of (±)-γ-lycorane, incorporating a new intramolecular Heck addition reaction to generate the pentacyclic core structure of the natural product in good yield.
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Affiliation(s)
- Alessandra Monaco
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, UK
| | - Blanka R Szulc
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, UK
| | - Zenobia X Rao
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, UK
| | - Marta Barniol-Xicota
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, Institute of Biomedicine (IBUB), Universitat de Barcelona, Av. Joan XXIII, s/n, 08028, Barcelona, Spain
| | - Moussa Sehailia
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, UK
| | - Bruno M A Borges
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, UK
| | - Stephen T Hilton
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, UK
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Liu C, Xie JH, Li YL, Chen JQ, Zhou QL. Asymmetric Hydrogenation of α,α′-Disubstituted Cycloketones through Dynamic Kinetic Resolution: An Efficient Construction of Chiral Diols with Three Contiguous Stereocenters. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201207561] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Liu C, Xie JH, Li YL, Chen JQ, Zhou QL. Asymmetric Hydrogenation of α,α′-Disubstituted Cycloketones through Dynamic Kinetic Resolution: An Efficient Construction of Chiral Diols with Three Contiguous Stereocenters. Angew Chem Int Ed Engl 2012; 52:593-6. [DOI: 10.1002/anie.201207561] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Indexed: 11/07/2022]
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13
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