1
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Kim A, Ngamnithiporn A, Du E, Stoltz BM. Recent Advances in the Total Synthesis of the Tetrahydroisoquinoline Alkaloids (2002-2020). Chem Rev 2023; 123:9447-9496. [PMID: 37429001 PMCID: PMC10416225 DOI: 10.1021/acs.chemrev.3c00054] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Indexed: 07/12/2023]
Abstract
The tetrahydroisoquinoline (THIQ) natural products constitute one of the largest families of alkaloids and exhibit a wide range of structural diversity and biological activity. Ranging from simple THIQ natural products to complex trisTHIQ alkaloids such as the ecteinascidins, the chemical syntheses of these alkaloids and their analogs have been thoroughly investigated due to their intricate structural features and functionalities, as well as their high therapeutic potential. This review describes the general structure and biosynthesis of each family of THIQ alkaloids as well as recent advancements of the total synthesis of these natural products from 2002 to 2020. Recent chemical syntheses that have emerged harnessing novel, creative synthetic design, and modern chemical methodology will be highlighted. This review will hopefully serve as a guide for the unique strategies and tools used in the total synthesis of THIQ alkaloids, as well as address the longstanding challenges in their chemical and biosynthesis.
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Affiliation(s)
- Alexia
N. Kim
- The
Warren and Katharine Schlinger Laboratory for Chemistry and Chemical
Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Aurapat Ngamnithiporn
- Laboratory
of Medicinal Chemistry, Chulabhorn Research
Institute, 54 Kamphaeng
Phet 6 Road, Bangkok 10210, Thailand
| | - Emily Du
- The
Warren and Katharine Schlinger Laboratory for Chemistry and Chemical
Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Brian M. Stoltz
- The
Warren and Katharine Schlinger Laboratory for Chemistry and Chemical
Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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2
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Tang Y, Zhang Y, Zhao J, Xue F, He H, Xue F, Liu XY, Qin Y. Asymmetric total synthesis of buprenorphine and dihydroetorphine. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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3
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Construction of Benzo‐Fused Heterocycles by Epoxide–Heteronucleophile Cyclization: Applications in the Synthesis of Natural Products and Designed Molecules. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101034] [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]
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4
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Qin Y, He H, Xue F, Hu Z, Li P, Xiao Q, Zhang M, Xue F, Zhang D, Song H, Liu XY, Zheng ZB, Li S, Zhong W. Concise total synthesis of opioids. Org Chem Front 2022. [DOI: 10.1039/d2qo00202g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Morphine and related alkaloids are among the most representative natural medicines that have benefited human beings for over two centuries. Industrial manufacturing of these therapeutically valuable and structurally fascinating molecules...
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5
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Wicks C, Hudlicky T, Rinner U. Morphine alkaloids: History, biology, and synthesis. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2021; 86:145-342. [PMID: 34565506 DOI: 10.1016/bs.alkal.2021.04.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
This chapter provides a short overview of the history of morphine since it's isolation by Sertürner in 1805. The biosynthesis of the title alkaloid as well as all total and formal syntheses of morphine and codeine published after 1996 are discussed in detail. The last section of this chapter provides a detailed overview of medicinally relevant derivatives of the title alkaloid.
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Affiliation(s)
- Christopher Wicks
- Department of Chemistry and Centre for Biotechnology, Brock University, St. Catharines, ON, Canada
| | - Tomas Hudlicky
- Department of Chemistry and Centre for Biotechnology, Brock University, St. Catharines, ON, Canada
| | - Uwe Rinner
- IMC Fachhochschule Krems/IMC University of Applied Sciences Krems, Krems, Austria.
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6
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Golec JC, Carter EM, Ward JW, Whittingham WG, Simón L, Paton RS, Dixon DJ. BIMP-Catalyzed 1,3-Prototropic Shift for the Highly Enantioselective Synthesis of Conjugated Cyclohexenones. Angew Chem Int Ed Engl 2020; 59:17417-17422. [PMID: 32558981 PMCID: PMC7540019 DOI: 10.1002/anie.202006202] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/03/2020] [Indexed: 12/18/2022]
Abstract
A bifunctional iminophosphorane (BIMP)-catalysed enantioselective synthesis of α,β-unsaturated cyclohexenones through a facially selective 1,3-prototropic shift of β,γ-unsaturated prochiral isomers, under mild reaction conditions and in short reaction times, on a range of structurally diverse substrates, is reported. α,β-Unsaturated cyclohexenone products primed for downstream derivatisation were obtained in high yields (up to 99 %) and consistently high enantioselectivity (up to 99 % ee). Computational studies into the reaction mechanism and origins of enantioselectivity, including multivariate linear regression of TS energy, were carried out and the obtained data were found to be in good agreement with experimental findings.
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Affiliation(s)
- Jonathan C. Golec
- Department of ChemistryChemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
| | - Eve M. Carter
- Department of ChemistryChemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
| | - John W. Ward
- Leverhulme Research Centre for Functional Materials DesignThe Materials Innovation FactoryDepartment of ChemistryUniversity of LiverpoolLiverpoolL7 3NYUK
| | | | - Luis Simón
- Facultad de Ciencias QuímicasUniversidad de SalamancaPlaza de los Caídos 1–537008SalamancaSpain
| | - Robert S. Paton
- Department of ChemistryColorado State University1301 Center AveFt. CollinsCO80523-1872USA
| | - Darren J. Dixon
- Department of ChemistryChemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
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7
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Golec JC, Carter EM, Ward JW, Whittingham WG, Simón L, Paton RS, Dixon DJ. BIMP‐Catalyzed 1,3‐Prototropic Shift for the Highly Enantioselective Synthesis of Conjugated Cyclohexenones. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006202] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Jonathan C. Golec
- Department of Chemistry Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Eve M. Carter
- Department of Chemistry Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - John W. Ward
- Leverhulme Research Centre for Functional Materials Design The Materials Innovation Factory Department of Chemistry University of Liverpool Liverpool L7 3NY UK
| | | | - Luis Simón
- Facultad de Ciencias Químicas Universidad de Salamanca Plaza de los Caídos 1–5 37008 Salamanca Spain
| | - Robert S. Paton
- Department of Chemistry Colorado State University 1301 Center Ave Ft. Collins CO 80523-1872 USA
| | - Darren J. Dixon
- Department of Chemistry Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA UK
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8
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Afanasyev OI, Kuchuk E, Usanov DL, Chusov D. Reductive Amination in the Synthesis of Pharmaceuticals. Chem Rev 2019; 119:11857-11911. [PMID: 31633341 DOI: 10.1021/acs.chemrev.9b00383] [Citation(s) in RCA: 306] [Impact Index Per Article: 61.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Reductive amination plays a paramount role in pharmaceutical and medicinal chemistry owing to its synthetic merits and the ubiquitous presence of amines among biologically active compounds. It is one of the key approaches to C-N bond construction due to its operational easiness and a wide toolbox of protocols. Recent studies show that at least a quarter of C-N bond-forming reactions in the pharmaceutical industry are performed via reductive amination. This Review concisely compiles information on 71 medical substances that are synthesized by reductive amination. Compounds are grouped according to the principle of action, which includes drugs affecting the central nervous system, drugs affecting the cardiovascular system, anticancer drugs, antibiotics, antiviral and antifungal medicines, drugs affecting the urinary system, drugs affecting the respiratory system, antidiabetic medications, drugs affecting the gastrointestinal tract, and drugs regulating metabolic processes. A general synthetic scheme is provided for each compound, and the description is focused on reductive amination steps. The green chemistry metric of reaction mass efficiency was calculated for all reactions.
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Affiliation(s)
- Oleg I Afanasyev
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences , Vavilova St. 28 , Moscow 119991 , Russian Federation
| | - Ekaterina Kuchuk
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences , Vavilova St. 28 , Moscow 119991 , Russian Federation
| | - Dmitry L Usanov
- Broad Institute of MIT and Harvard , 415 Main Street , Cambridge , Massachusetts 02142 , United States
| | - Denis Chusov
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences , Vavilova St. 28 , Moscow 119991 , Russian Federation.,National Research University Higher School of Economics , Miasnitskaya Str. 20 , Moscow 101000 , Russian Federation.,Peoples' Friendship University of Russia , 6 Miklukho-Maklaya Street , Moscow 117198 , Russian Federation
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9
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O’Broin CQ, Guiry PJ. Construction of All-Carbon Quaternary Stereocenters by Palladium-Catalyzed Decarboxylative Propargylation. Org Lett 2019; 21:5402-5406. [DOI: 10.1021/acs.orglett.9b01493] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Calvin Q. O’Broin
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Patrick J. Guiry
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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10
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Enantioselective synthesis of cis-hydrobenzofurans bearing all-carbon quaternary stereocenters and application to total synthesis of (‒)-morphine. Nat Commun 2019; 10:2507. [PMID: 31175289 PMCID: PMC6555830 DOI: 10.1038/s41467-019-10398-4] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 05/07/2019] [Indexed: 12/31/2022] Open
Abstract
(‒)-Morphine, which is selected as an essential medicine by World Health Organization, is widely applied in the treatment of the pain-related diseases. Due to its synthetically challenging molecular architecture and important clinical role, extensive synthetic studies of morphine-type alkaloids have been conducted. However, catalytic asymmetric total synthesis of (‒)-morphine remains a long-standing challenge. Here, we disclose an efficient enantioselective total synthesis of (‒)-morphine in a longest linear sequence of 16 steps. The key transformation features a highly enantioselective Robinson annulation enabled by our spiro-pyrrolidine catalyst to rapidly construct the densely functionalized cis-hydrodibenzofuran framework containing vicinal stereocenters with an all-carbon quaternary center. This asymmetric approach provides an alternative strategy for the synthesis of (‒)-morphine and its analogues. (‒)-Morphine is an essential medicine selected by the World Health Organization, however its catalytic asymmetric syntheses have been rarely reported. Here, the authors developed an intramolecular enantioselective Michael addition leading to (‒)-morphine in a longest linear sequence of 16 steps.
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11
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Abstract
A nine-step stereoselective formal synthesis of (±)-morphine from readily available o-vanillin is presented. The carbocyclic structure of morphine was quickly assembled through an orchestration of the intermolecular Diels-Alder/Claisen/Friedel-Crafts sequential reaction. This approach involves many one-pot procedures and no protecting groups, and only a few chromatographic purifications are required.
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Affiliation(s)
- Julie Brousseau
- Center for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , Canada K1N 6N5
| | - Amandine Xolin
- Center for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , Canada K1N 6N5
| | - Louis Barriault
- Center for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , Canada K1N 6N5
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12
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Yang X, Li Y, Kong L, Li X. Access to Quaternary Stereogenic Centers via Rhodium(III)-Catalyzed Annulations between 2-Phenylindoles and Ketenes. Org Lett 2018; 20:1957-1960. [DOI: 10.1021/acs.orglett.8b00497] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Xifa Yang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yunyun Li
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lingheng Kong
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xingwei Li
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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13
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Rautschek J, Jäger A, Metz P. Formal Synthesis of (−)-Codeine by Application of Temporary Thio Derivatization. Org Lett 2018; 20:832-835. [DOI: 10.1021/acs.orglett.7b03972] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Julia Rautschek
- Fakultät Chemie und Lebensmittelchemie,
Organische Chemie I, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
| | - Anne Jäger
- Fakultät Chemie und Lebensmittelchemie,
Organische Chemie I, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
| | - Peter Metz
- Fakultät Chemie und Lebensmittelchemie,
Organische Chemie I, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
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14
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Shi Y, Wang Q, Gao S. Recent advances in the intramolecular Mannich reaction in natural products total synthesis. Org Chem Front 2018. [DOI: 10.1039/c7qo01079f] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This review focuses on selected applications of the intramolecular Mannich reaction as a key step in the total synthesis of natural products (2000–2017).
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Affiliation(s)
- Yingbo Shi
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- China
| | - Qiaoling Wang
- East China Normal University Library
- Shanghai 200062
- China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
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15
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Ho Kenny Park K, Chen R, Chen DYK. Programmed serial stereochemical relay and its application in the synthesis of morphinans. Chem Sci 2017; 8:7031-7037. [PMID: 29147530 PMCID: PMC5642196 DOI: 10.1039/c7sc03189k] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 08/15/2017] [Indexed: 11/21/2022] Open
Abstract
Herein we report a rationally designed, serial point-to-axial and axial-to-point stereoinduction and its integration into multi-step and target-oriented organic synthesis. In this proof-of-concept study, the configurational stability of several carefully designed atropisomeric intermediates and the fidelity of their unconventional stereoinductions were systematically investigated. The highly functionalized prepared synthetic intermediate was further applied in a novel chemical method to access the morphinans and it is potentially applicable to other structurally related alkaloids.
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Affiliation(s)
- Kun Ho Kenny Park
- Department of Chemistry , Seoul National University , Gwanak-1 Gwanak-ro, Gwanak-gu , Seoul 151-742 , South Korea .
| | - Rui Chen
- Department of Chemistry , Seoul National University , Gwanak-1 Gwanak-ro, Gwanak-gu , Seoul 151-742 , South Korea .
| | - David Y-K Chen
- Department of Chemistry , Seoul National University , Gwanak-1 Gwanak-ro, Gwanak-gu , Seoul 151-742 , South Korea .
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16
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Umihara H, Yokoshima S, Inoue M, Fukuyama T. Total Synthesis of (−)-Morphine. Chemistry 2017; 23:6993-6995. [DOI: 10.1002/chem.201701438] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Hirotatsu Umihara
- Graduate School of Pharmaceutical Sciences; University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Satoshi Yokoshima
- Graduate School of Pharmaceutical Sciences; Nagoya University, Furo-cho, Chikusa, Nagoya; Aichi 464-8601 Japan
| | - Masayuki Inoue
- Graduate School of Pharmaceutical Sciences; University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Tohru Fukuyama
- Graduate School of Pharmaceutical Sciences; Nagoya University, Furo-cho, Chikusa, Nagoya; Aichi 464-8601 Japan
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17
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Zhang H, Ma S, Xing Z, Liu L, Fang B, Xie X, She X. Rapid construction of the 6/6/5 tricyclic framework via a tandem radical cyclization reaction and its application to the synthesis of 5-epi-7-deoxy-isoabietenin A. Org Chem Front 2017. [DOI: 10.1039/c7qo00550d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A tandem radical cyclization towards the 6/6/5 tricyclic skeleton, which exists in numerous natural products, was developed in modest to good yields.
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Affiliation(s)
- Hao Zhang
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou 730000
- China
| | - Shiqiang Ma
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou 730000
- China
| | - Zhimin Xing
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou 730000
- China
| | - Lin Liu
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou 730000
- China
| | - Bowen Fang
- Chemical Engineering Institute
- Northwest University for Nationalities
- Lanzhou
- China
| | - Xingang Xie
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou 730000
- China
| | - Xuegong She
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou 730000
- China
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18
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Hu J, Bian M, Ding H. Recent application of oxa-Michael reaction in complex natural product synthesis. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.11.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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19
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Chu S, Münster N, Balan T, Smith MD. A Cascade Strategy Enables a Total Synthesis of (±)-Morphine. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608526] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shuyu Chu
- Chemistry Research Laboratory; University of Oxford; 12 Mansfield Road Oxford OX1 3TA UK
| | - Niels Münster
- Chemistry Research Laboratory; University of Oxford; 12 Mansfield Road Oxford OX1 3TA UK
| | - Tudor Balan
- Chemistry Research Laboratory; University of Oxford; 12 Mansfield Road Oxford OX1 3TA UK
| | - Martin D. Smith
- Chemistry Research Laboratory; University of Oxford; 12 Mansfield Road Oxford OX1 3TA UK
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20
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Chu S, Münster N, Balan T, Smith MD. A Cascade Strategy Enables a Total Synthesis of (±)-Morphine. Angew Chem Int Ed Engl 2016; 55:14306-14309. [PMID: 27735107 PMCID: PMC5129523 DOI: 10.1002/anie.201608526] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Indexed: 11/09/2022]
Abstract
Morphine has been a target for synthetic chemists since Robinson proposed its correct structure in 1925, resulting in a large number of total syntheses of morphine alkaloids. Here we report a total synthesis of (±)‐morphine that employs two key strategic cyclizations: 1) a diastereoselective light‐mediated cyclization of an O‐arylated butyrolactone to form a tricyclic cis‐fused benzofuran and 2) a cascade ene–yne–ene ring closing metathesis to forge the tetracyclic morphine core. This approach enables a short and stereoselective synthesis of morphine in an overall yield of 6.6 %.
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Affiliation(s)
- Shuyu Chu
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Niels Münster
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Tudor Balan
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Martin D Smith
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK.
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21
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Asymmetric construction of all-carbon quaternary stereocenters in the total synthesis of natural products. Sci China Chem 2016. [DOI: 10.1007/s11426-016-0055-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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