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Ďurina L, Ďurinová A, Trejtnar F, Janotka Ľ, Messingerová L, Doháňošová J, Moncol J, Fischer R. Highly stereocontrolled total synthesis of racemic codonopsinol B through isoxazolidine-4,5-diol vinylation. Beilstein J Org Chem 2021; 17:2781-2786. [PMID: 34900008 PMCID: PMC8630432 DOI: 10.3762/bjoc.17.188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 11/15/2021] [Indexed: 11/23/2022] Open
Abstract
A new highly diastereoselective synthesis of the polyhydroxylated pyrrolidine alkaloid (±)-codonopsinol B and its N-nor-methyl analogue, starting from achiral materials, is presented. The strategy relies on the trans-stereoselective epoxidation of 2,3-dihydroisoxazole with in situ-generated DMDO, the syn-selective α-chelation-controlled addition of vinyl-MgBr/CeCl3 to the isoxazolidine-4,5-diol intermediate, and the substrate-directed epoxidation of the terminal double bond of the corresponding γ-amino-α,β-diol with aqueous hydrogen peroxide catalyzed by phosphotungstic heteropoly acid. Each of the key reactions proceeded with an excellent diastereoselectivity (dr > 95:5). (±)-Codonopsinol B was prepared in 10 steps with overall 8.4% yield. The antiproliferative effect of (±)-codonopsinol B and its N-nor-methyl analogue was evaluated using several cell line models.
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Affiliation(s)
- Lukáš Ďurina
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovak Republic
| | - Anna Ďurinová
- Faculty of Pharmacy in Hradec Kralove, Charles University, Heyrovskeho 1203, 50005 Hradec Kralove, Czech Republic
| | - František Trejtnar
- Faculty of Pharmacy in Hradec Kralove, Charles University, Heyrovskeho 1203, 50005 Hradec Kralove, Czech Republic
| | - Ľuboš Janotka
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 845 05 Bratislava 4, Slovak Republic
| | - Lucia Messingerová
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 845 05 Bratislava 4, Slovak Republic
- Institute of Biochemistry and Microbiology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovak Republic
| | - Jana Doháňošová
- Central Laboratories, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovak Republic
| | - Ján Moncol
- Institute of Inorganic Chemistry, Technology and Materials, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovak Republic
| | - Róbert Fischer
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovak Republic
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Ezawa T, Sohtome Y, Hashizume D, Adachi M, Akakabe M, Koshino H, Sodeoka M. Dynamics in Catalytic Asymmetric Diastereoconvergent (3 + 2) Cycloadditions with Isomerizable Nitrones and α-Keto Ester Enolates. J Am Chem Soc 2021; 143:9094-9104. [PMID: 34107685 DOI: 10.1021/jacs.1c02833] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reaction design in asymmetric catalysis has traditionally been predicated on a structurally robust scaffold in both substrates and catalysts, to reduce the number of possible diastereomeric transition states. Herein, we present the stereochemical dynamics in the Ni(II)-catalyzed diastereoconvergent (3 + 2) cycloadditions of isomerizable nitrile-conjugated nitrones with α-keto ester enolates. Even in the presence of multiple equilibrating species, the catalytic protocol displays a wide substrate scope to access a range of CN-containing building blocks bearing adjacent stereocenters with high enantio- and diastereoselectivities. Our computational investigations suggest that the enantioselectivity is governed in the deprotonation process to form (Z)-Ni-enolates, while the unique syn addition is mainly controlled by weak noncovalent bonding interactions between the nitrone and ligand.
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Affiliation(s)
- Tetsuya Ezawa
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yoshihiro Sohtome
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Daisuke Hashizume
- RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Masaya Adachi
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Mai Akakabe
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Hiroyuki Koshino
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Mikiko Sodeoka
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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3
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5-Bromoisoxazolidines: synthesis, reactivity and NMR study. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Štadániová R, Sahulčík M, Doháňošová J, Moncol J, Janotka Ľ, Šimoničová K, Messingerová L, Fischer R. Synthesis of 1,2,3-Triazoles Bearing a 4-Hydroxyisoxazolidine Moiety from 4,5-Unsubstituted 2,3-Dihydroisoxazoles. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000737] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Radka Štadániová
- Institute of Organic Chemistry; Catalysis and Petrochemistry; Slovak University of Technology in Bratislava; Radlinského 9 81237 Bratislava Slovak Republic
| | - Michal Sahulčík
- Institute of Organic Chemistry; Catalysis and Petrochemistry; Slovak University of Technology in Bratislava; Radlinského 9 81237 Bratislava Slovak Republic
| | - Jana Doháňošová
- Central Laboratories; Slovak University of Technology in Bratislava; Radlinského 9 81237 Bratislava Slovak Republic
| | - Ján Moncol
- Institute of Inorganic Chemistry; Technology and Materials; Slovak University of Technology in Bratislava; Radlinského 9 81237 Bratislava Slovak Republic
| | - Ľuboš Janotka
- Institute of Molecular Physiology and Genetics; Centre of Biosciences; Slovak Academy of Sciences; Dúbravská cesta 9 84505 Bratislava 4 Slovak Republic
| | - Kristína Šimoničová
- Institute of Molecular Physiology and Genetics; Centre of Biosciences; Slovak Academy of Sciences; Dúbravská cesta 9 84505 Bratislava 4 Slovak Republic
| | - Lucia Messingerová
- Institute of Molecular Physiology and Genetics; Centre of Biosciences; Slovak Academy of Sciences; Dúbravská cesta 9 84505 Bratislava 4 Slovak Republic
- Institute of Biochemistry and Microbiology; Slovak University of Technology in Bratislava; Radlinského 9 81237 Bratislava Slovak Republic
| | - Róbert Fischer
- Institute of Organic Chemistry; Catalysis and Petrochemistry; Slovak University of Technology in Bratislava; Radlinského 9 81237 Bratislava Slovak Republic
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5
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Dikošová L, Laceková J, Záborský O, Fischer R. Synthesis of 3-substituted isoxazolidin-4-ols using hydroboration-oxidation reactions of 4,5-unsubstituted 2,3-dihydroisoxazoles. Beilstein J Org Chem 2020; 16:1313-1319. [PMID: 32595779 PMCID: PMC7308612 DOI: 10.3762/bjoc.16.112] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 05/28/2020] [Indexed: 01/04/2023] Open
Abstract
Isoxazolidines represent a very important class of N/O-containing heterocycles used as the key intermediates in the synthesis of more complex cyclic and acyclic compounds, including various biologically active molecules. Here, we present a fast and highly stereoselective approach towards both C-3/4-cis and C-3/4-trans isomers of 3-substituted isoxazolidin-4-ols. The strategy relies on a highly regio- and trans-stereoselective hydroboration-oxidation reaction of the 4,5-unsubstituted 2,3-dihydroisoxazoles with basic hydrogen peroxide. The consecutive oxidation/reduction route, sequentially employing Dess-Martin periodinane and ʟ-selectride, is used for the inversion of the C-3/4-trans relative configuration of the isoxazolidine ring. The significance of the method lies in its variability and applicability to a concise synthesis of various 4-hydroxyisoxazolidines, starting from the readily available C-alkyl/aryl-nitrones. The resemblance to 3-hydroxypyrrolidines certainly makes the 4-hydroxyisoxazolidines important and valuable structural fragments in drug discovery.
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Affiliation(s)
- Lívia Dikošová
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovak Republic
| | - Júlia Laceková
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovak Republic
| | - Ondrej Záborský
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovak Republic
| | - Róbert Fischer
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovak Republic
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Malatinský T, Spišáková M, Babjak M, Doháňošová J, Marek J, Moncol J, Fischer R. Reversal of Stereoselectivity in Cycloadditions of Five-Membered Cyclic Nitrones Derived from Hexoses. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601488] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tomáš Malatinský
- Institute of Organic Chemistry, Catalysis and Petrochemistry; Slovak University of Technology in Bratislava; Radlinského 9 81237 Bratislava Slovak Republic
| | - Mária Spišáková
- Institute of Organic Chemistry, Catalysis and Petrochemistry; Slovak University of Technology in Bratislava; Radlinského 9 81237 Bratislava Slovak Republic
| | - Matej Babjak
- Institute of Organic Chemistry, Catalysis and Petrochemistry; Slovak University of Technology in Bratislava; Radlinského 9 81237 Bratislava Slovak Republic
| | - Jana Doháňošová
- Central Laboratories; Slovak University of Technology in Bratislava; Radlinského 9 81237 Bratislava Slovak Republic
| | - Jaromír Marek
- Central European Institute of Technology; Masaryk University; Kamenice 753/5 62500 Brno Czech Republic
| | - Ján Moncol
- Institute of Inorganic Chemistry, Technology and Materials; Slovak University of Technology in Bratislava; Radlinského 9 81237 Bratislava Slovak Republic
| | - Róbert Fischer
- Institute of Organic Chemistry, Catalysis and Petrochemistry; Slovak University of Technology in Bratislava; Radlinského 9 81237 Bratislava Slovak Republic
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