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Bilska-Markowska M, Jankowski W, Hoffmann M, Kaźmierczak M. Design and Synthesis of New α-hydroxy β-fluoro/β-trifluoromethyl and Unsaturated Phosphonates from Carbohydrate-Derived Building Blocks via Pudovik and Horner–Wadsworth–Emmons Reactions. Molecules 2022; 27:molecules27175404. [PMID: 36080169 PMCID: PMC9457578 DOI: 10.3390/molecules27175404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 08/21/2022] [Accepted: 08/22/2022] [Indexed: 11/16/2022] Open
Abstract
Herein, we present the application of fluorinated carbohydrate-derived building blocks for α-hydroxy β-fluoro/β-trifluoromethyl and unsaturated phosphonates synthesis. Pudovik and Horner–Wadsworth–Emmons reactions were applied to achieve this goal. The proposed pathway of the key reactions is supported by the experimental results, as well as quantum chemical calculations. The structure of the products was established by spectroscopic (1D, 2D NMR) and spectrometric (MS) techniques. Based on our data received, we claim that the progress of the Pudovik and HWE reactions is significantly influenced by the acidic protons present in the molecules as assessed by pKa values of the reagent.
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Affiliation(s)
- Monika Bilska-Markowska
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Wojciech Jankowski
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Marcin Hoffmann
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Marcin Kaźmierczak
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
- Centre for Advanced Technologies, Adam Mickiewicz University, Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
- Correspondence:
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2
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Torres J, Escolano M, Alzuet-Piña G, Sánchez-Roselló M, Del Pozo C. Double asymmetric intramolecular aza-Michael reaction: a convenient strategy for the synthesis of quinolizidine alkaloids. Org Biomol Chem 2021; 19:8740-8745. [PMID: 34581390 DOI: 10.1039/d1ob01488a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new methodology to access the quinolizidine skeleton in an asymmetric fashion was devised. It involves two consecutive intramolecular aza-Michael reactions of sulfinyl amines bearing a bis-enone moiety, in turn generated by a monodirectional cross metathesis reaction. The sequence, which takes place with excellent yields and diastereocontrol, was applied to the total synthesis of alkaloids lasubine I and myrtine.
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Affiliation(s)
- Javier Torres
- Department of Organic Chemistry, University of Valencia, Vicente Andrés Estellés s/n, 46100-Burjassot-Valencia, Spain.
| | - Marcos Escolano
- Department of Organic Chemistry, University of Valencia, Vicente Andrés Estellés s/n, 46100-Burjassot-Valencia, Spain.
| | - Gloria Alzuet-Piña
- Department of Inorganic Chemistry, University of Valencia, Vicente Andrés Estellés s/n, 46100-Burjassot-Valencia, Spain
| | - María Sánchez-Roselló
- Department of Organic Chemistry, University of Valencia, Vicente Andrés Estellés s/n, 46100-Burjassot-Valencia, Spain.
| | - Carlos Del Pozo
- Department of Organic Chemistry, University of Valencia, Vicente Andrés Estellés s/n, 46100-Burjassot-Valencia, Spain.
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3
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Sánchez-Roselló M, Escolano M, Gaviña D, Del Pozo C. Two Decades of Progress in the Asymmetric Intramolecular aza-Michael Reaction. CHEM REC 2021; 22:e202100161. [PMID: 34415097 DOI: 10.1002/tcr.202100161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/22/2021] [Accepted: 08/04/2021] [Indexed: 11/08/2022]
Abstract
The asymmetric intramolecular aza-Michael reaction (IMAMR) is a very convenient strategy for the generation of heterocycles bearing nitrogen-substituted stereocenters. Due to the ubiquitous presence of these skeletons in natural products, the IMAMR has found widespread applications in the total synthesis of alkaloids and biologically relevant compounds. The development of asymmetric versions of the IMAMR are quite recent, most of them reported in this century. The fundamental advances in this field involve the use of organocatalysts. Chiral imidazolidinones, diaryl prolinol derivatives, Cinchone-derived primary amines and quaternary ammonium salts, and BINOL-derived phosphoric acids account for the success of those methodologies. Moreover, the use of N-sulfinyl imines with a dual role, as nitrogen nucleophiles and as chiral auxiliaries, appeared as a versatile mode of performing the asymmetric IMAMR.
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Affiliation(s)
- María Sánchez-Roselló
- Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100-Burjassot, Valencia), Spain
| | - Marcos Escolano
- Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100-Burjassot, Valencia), Spain
| | - Daniel Gaviña
- Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100-Burjassot, Valencia), Spain
| | - Carlos Del Pozo
- Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100-Burjassot, Valencia), Spain
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4
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Kim JH, Paul A, Ghiviriga I, Seidel D. α-C-H Bond Functionalization of Unprotected Alicyclic Amines: Lewis-Acid-Promoted Addition of Enolates to Transient Imines. Org Lett 2021; 23:797-801. [PMID: 33464093 PMCID: PMC7924990 DOI: 10.1021/acs.orglett.0c04024] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Enolizable cyclic imines, obtained in situ from their corresponding lithium amides by oxidation with simple ketone oxidants, are readily alkylated with a range of enolates to provide mono- and polycyclic β-aminoketones in a single operation, including the natural product (±)-myrtine. Nitrile anions also serve as competent nucleophiles in these transformations, which are promoted by BF3 etherate. β-Aminoesters derived from ester enolates can be converted to the corresponding β-lactams.
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Affiliation(s)
- Jae Hyun Kim
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Anirudra Paul
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Center for NMR Spectroscopy, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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5
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Bates RW, Ko W, Barát V. The endo-aza-Michael addition in the synthesis of piperidines and pyrrolidines. Org Biomol Chem 2020; 18:810-829. [DOI: 10.1039/c9ob02388g] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Intramolecular endo-aza-Michael additions are categorised in various ways.
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Affiliation(s)
- Roderick W. Bates
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - Weiting Ko
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - Viktor Barát
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
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6
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Wang Z. Advances in the Asymmetric Total Synthesis of Natural Products Using Chiral Secondary Amine Catalyzed Reactions of α,β-Unsaturated Aldehydes. Molecules 2019; 24:E3412. [PMID: 31546876 PMCID: PMC6767148 DOI: 10.3390/molecules24183412] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/14/2019] [Accepted: 09/19/2019] [Indexed: 11/16/2022] Open
Abstract
Chirality is one of the most important attributes for its presence in a vast majority of bioactive natural products and pharmaceuticals. Asymmetric organocatalysis methods have emerged as a powerful methodology for the construction of highly enantioenriched structural skeletons of the target molecules. Due to their extensive application of organocatalysis in the total synthesis of bioactive molecules and some of them have been used in the industrial synthesis of drugs have attracted increasing interests from chemists. Among the chiral organocatalysts, chiral secondary amines (MacMillan's catalyst and Jorgensen's catalyst) have been especially considered attractive strategies because of their impressive efficiency. Herein, we outline advances in the asymmetric total synthesis of natural products and relevant drugs by using the strategy of chiral secondary amine catalyzed reactions of α,β-unsaturated aldehydes in the last eighteen years.
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Affiliation(s)
- Zhonglei Wang
- School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, China.
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China.
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7
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Zaidan RK, Evans P. Strategies for the Asymmetric Construction of Pelletierine and its Use in the Synthesis of Sedridine, Myrtine, and Lasubine. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900477] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Raed K. Zaidan
- School of Chemistry Centre for Synthesis and Chemical Biology University College Dublin Dublin D04, N2E5 Ireland
- Department of Chemistry College of Science University of Basra Iraq
| | - Paul Evans
- School of Chemistry Centre for Synthesis and Chemical Biology University College Dublin Dublin D04, N2E5 Ireland
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8
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Yuan W, Pan Y, Zhang X, Liang P, Zhang J, Jiao W, Shao H. Direct and highly stereoselective synthesis of quinolizidine iminosugars promoted by l-proline-Et 3N. Org Biomol Chem 2018; 16:9230-9236. [PMID: 30483692 DOI: 10.1039/c8ob01953c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mild and effective method for the synthesis of polyhydroxylated quinolizidine iminosugars is described. The Mannich-type reaction of iminosugar C-glycosides with aldehyde in the presence of l-proline-Et3N provides polyhydroxylated quinolizidine iminosugars, and desired products as the potential glucosidase inhibitors were obtained in good to excellent yields with excellent stereoselectivity.
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Affiliation(s)
- Wen Yuan
- Natural Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu, China.
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9
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Barát V, Csókás D, Bates RW. Synthesis of (−)-Cytisine Using a 6-endo aza-Michael Addition. J Org Chem 2018; 83:9088-9095. [DOI: 10.1021/acs.joc.8b01156] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Viktor Barát
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 637371, Singapore
| | - Dániel Csókás
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 637371, Singapore
| | - Roderick W. Bates
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 637371, Singapore
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10
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Abstract
This chapter covers the literature since the advent, in the 21st century, of total syntheses of alkaloids using enantio- or diastereoselective organocatalytic reactions to construct the alkaloid scaffolds. The details of these alkaloid syntheses are described separately for each basic skeleton, including indole, indoline, oxindole, and piperidine alkaloids.
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12
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Kandepedu N, Abrunhosa-Thomas I, Troin Y. Stereoselective strategies for the construction of polysubstituted piperidinic compounds and their applications in natural products’ synthesis. Org Chem Front 2017. [DOI: 10.1039/c7qo00262a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An abridged and far-reaching review communication on the construction of the polysubstituted piperidinic core using diverse methodologies for the benefit of organic chemists interested in the total synthesis of biologically active compounds.
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Affiliation(s)
- Nishanth Kandepedu
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - Isabelle Abrunhosa-Thomas
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - Yves Troin
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
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13
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Visible light photoredox and Polonovski-Potier cyclizations for the synthesis of (±)-5-epi-cermizine C and (±)-epimyrtine. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.10.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Abstract
Indolizidine and quinolizidine derivatives are readily assembled from proline or pipecolic acid and γ-nitroaldehydes by means of a decarboxylative annulation process. These reactions are promoted by simple acetic acid and involve azomethine ylides as reactive intermediates. The method was applied to the synthesis of an epiquinamide analog.
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Affiliation(s)
- YoungKu Kang
- Department of Chemistry and
Chemical Biology, Rutgers, The State University
of New Jersey, Piscataway, New Jersey 08854, United States
| | - Daniel Seidel
- Department of Chemistry and
Chemical Biology, Rutgers, The State University
of New Jersey, Piscataway, New Jersey 08854, United States
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15
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Veerasamy N, Carter RG. Synthesis of quinolizidine-containing lycopodium alkaloids and related natural products. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.06.043] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Ishikawa H, Shiomi S. Alkaloid synthesis using chiral secondary amine organocatalysts. Org Biomol Chem 2016; 14:409-424. [DOI: 10.1039/c5ob02021b] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The full strategies of alkaloid syntheses which contain asymmetric organocatalytic reaction for construction of these scaffolds is discussed.
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Affiliation(s)
- Hayato Ishikawa
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | - Shinya Shiomi
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
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Enzymatic Kinetic Resolution of 2-Piperidineethanol for the Enantioselective Targeted and Diversity Oriented Synthesis. Int J Mol Sci 2015; 17:ijms17010017. [PMID: 26712740 PMCID: PMC4730264 DOI: 10.3390/ijms17010017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 12/11/2015] [Accepted: 12/15/2015] [Indexed: 01/22/2023] Open
Abstract
2-Piperidineethanol (1) and its corresponding N-protected aldehyde (2) were used for the synthesis of several natural and synthetic compounds. The existence of a stereocenter at position 2 of the piperidine skeleton and the presence of an easily-functionalized group, such as the alcohol, set 1 as a valuable starting material for enantioselective synthesis. Herein, are presented both synthetic and enzymatic methods for the resolution of the racemic 1, as well as an overview of synthesized natural products starting from the enantiopure 1.
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Abstract
This review of simple indolizidine and quinolizidine alkaloids (i.e., those in which the parent bicyclic systems are in general not embedded in polycyclic arrays) is an update of the previous coverage in Volume 55 of this series (2001). The present survey covers the literature from mid-1999 to the end of 2013; and in addition to aspects of the isolation, characterization, and biological activity of the alkaloids, much emphasis is placed on their total synthesis. A brief introduction to the topic is followed by an overview of relevant alkaloids from fungal and microbial sources, among them slaframine, cyclizidine, Steptomyces metabolites, and the pantocins. The important iminosugar alkaloids lentiginosine, steviamine, swainsonine, castanospermine, and related hydroxyindolizidines are dealt with in the subsequent section. The fourth and fifth sections cover metabolites from terrestrial plants. Pertinent plant alkaloids bearing alkyl, functionalized alkyl or alkenyl substituents include dendroprimine, anibamine, simple alkaloids belonging to the genera Prosopis, Elaeocarpus, Lycopodium, and Poranthera, and bicyclic alkaloids of the lupin family. Plant alkaloids bearing aryl or heteroaryl substituents include ipalbidine and analogs, secophenanthroindolizidine and secophenanthroquinolizidine alkaloids (among them septicine, julandine, and analogs), ficuseptine, lasubines, and other simple quinolizidines of the Lythraceae, the simple furyl-substituted Nuphar alkaloids, and a mixed quinolizidine-quinazoline alkaloid. The penultimate section of the review deals with the sizable group of simple indolizidine and quinolizidine alkaloids isolated from, or detected in, ants, mites, and terrestrial amphibians, and includes an overview of the "dietary hypothesis" for the origin of the amphibian metabolites. The final section surveys relevant alkaloids from marine sources, and includes clathryimines and analogs, stellettamides, the clavepictines and pictamine, and bis(quinolizidine) alkaloids.
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Scope and limitations of the synthesis of functionalized quinolizidinones and related compounds by a simple precursor approach via addition of lithium allylmagnesates to 2-pyridones and RCM as key steps. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.09.043] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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20
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Vu VH, Louafi F, Girard N, Marion R, Roisnel T, Dorcet V, Hurvois JP. Electrochemical Access to 8-(1-Phenyl-ethyl)-1,4-dioxa-8-aza-spiro[4.5]decane-7-carbonitrile. Application to the Asymmetric Syntheses of (+)-Myrtine and Alkaloid (+)-241D. J Org Chem 2014; 79:3358-73. [DOI: 10.1021/jo500104c] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Van Ha Vu
- Sciences Chimiques de Rennes, UMR 6226, CNRS−Université de Rennes 1, 2 Avenue Leon Bernard, 35043 Rennes Cedex, France
| | - Fadila Louafi
- Unité de Recherche CHEMS, Faculté des Sciences
Exactes, Université Constantine1, Route de Ain El Bey, 25000 Constantine, Algérie
| | - Nicolas Girard
- Faculté de Pharmacie, Université de Strasbourg UMR 7200 CNRS/UDS, 74 Route du Rhin, 67401 Illkirch Graffenstaden, France
| | - Ronan Marion
- Sciences Chimiques de Rennes, UMR 6226, CNRS−Université de Rennes 1, Campus de Beaulieu,
Avenue du général Leclerc, 35042 Rennes Cedex, France
| | - Thierry Roisnel
- Sciences Chimiques de Rennes, UMR 6226, CNRS−Université de Rennes 1, Campus de Beaulieu,
Avenue du général Leclerc, 35042 Rennes Cedex, France
| | - Vincent Dorcet
- Sciences Chimiques de Rennes, UMR 6226, CNRS−Université de Rennes 1, Campus de Beaulieu,
Avenue du général Leclerc, 35042 Rennes Cedex, France
| | - Jean-Pierre Hurvois
- Sciences Chimiques de Rennes, UMR 6226, CNRS−Université de Rennes 1, 2 Avenue Leon Bernard, 35043 Rennes Cedex, France
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Sánchez-Roselló M, Aceña JL, Simón-Fuentes A, del Pozo C. A general overview of the organocatalytic intramolecular aza-Michael reaction. Chem Soc Rev 2014; 43:7430-53. [DOI: 10.1039/c4cs00156g] [Citation(s) in RCA: 140] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The organocatalytic intramolecular aza-Michael reaction: a useful strategy to generate enantiomerically enriched nitrogen-containing heterocycles.
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Affiliation(s)
- María Sánchez-Roselló
- Departamento de Química Orgánica
- Universidad de Valencia
- E-46100-Burjassot, Spain
- Laboratorio de Moléculas Orgánicas
- Centro de Investigación Principe Felipe
| | - José Luis Aceña
- Departamento de Química Orgánica I
- Universidad del País Vasco UPV/EHU
- San Sebastián, Spain
| | | | - Carlos del Pozo
- Departamento de Química Orgánica
- Universidad de Valencia
- E-46100-Burjassot, Spain
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22
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Thorat RG, Pansare SV. A General Approach to 1-Hydroxymethylquinolizidine and 8-Hydroxymethylindolizidine Stereoisomers: Synthesis of (+)-Epitashiromine and Formal Syntheses of (+)-Epilupinine and (+)-Tashiromine. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301078] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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23
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Veerasamy N, Carlson EC, Collett ND, Saha M, Carter RG. Enantioselective approach to quinolizidines: total synthesis of cermizine D and formal syntheses of senepodine G and cermizine C. J Org Chem 2013; 78:4779-800. [PMID: 23627426 DOI: 10.1021/jo400324t] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The formal syntheses of C5-epi-senepodine G and C5-epi-cermizine C have been accomplished through a novel diastereoselective, intramolecular amide Michael addition process. The total synthesis of cermizine D has been achieved through use of an organocatalyzed, heteroatom Michael addition to access a common intermediate. Additional key steps of this sequence include a matched, diastereoselective alkylation with an iodomethylphenyl sulfide and sulfone-aldehyde coupling/reductive desulfurization sequence to combine the major subunits. The utility of a Hartwig-style C-N coupling has been explored on functionally dense coupling partners. Diastereoselective conjugate additions to α,β-unsaturated sulfones have been investigated, which provided the key sulfone intermediate in just six steps from commercially available starting materials. The formal syntheses of senepodine G and cermizine C have been accomplished through an intramolecular cyclization process of a N-Boc-protected piperidine sulfone.
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Affiliation(s)
- Nagarathanam Veerasamy
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, USA
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24
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A hydrozirconation/iodination-mediated access to tetrahydroquinolizinium salts. Application to the synthesis of Lupinine and (−)-Epiquinamide. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.12.073] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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25
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Amara Z, Caron J, Joseph D. Recent contributions from the asymmetric aza-Michael reaction to alkaloids total synthesis. Nat Prod Rep 2013; 30:1211-25. [DOI: 10.1039/c3np20121j] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Harada S, Sakai T, Takasu K, Yamada KI, Yamamoto Y, Tomioka K. General entry to asymmetric one-pot [N + 2 + n] cyclization for the synthesis of three- to seven-membered azacycloalkanes. J Org Chem 2012; 77:7212-22. [PMID: 22894619 DOI: 10.1021/jo301495a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Enantio- and diastereoselective one-pot synthesis of three- to seven-membered cis-azaheterocycles was achieved using a triggered asymmetric conjugate addition reaction of lithium amide with an enoate, followed by alkylation of the resulting lithium enolate with α,ω-dihaloalkane and N-alkylation. Isomerization of cis-azaheterocycles with a base yielded the trans-product, constituting a one-pot synthesis of cis-azacycles and a two-step synthesis of trans-azacycles. The four-step asymmetric synthesis of nemonapride highlights the general utility of the method.
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Affiliation(s)
- Shingo Harada
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
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27
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Wang J, Li P, Choy PY, Chan ASC, Kwong FY. Advances and Applications in Organocatalytic Asymmetric aza-Michael Addition. ChemCatChem 2012. [DOI: 10.1002/cctc.201200135] [Citation(s) in RCA: 138] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Veerasamy N, Carlson EC, Carter RG. Expedient enantioselective synthesis of cermizine D. Org Lett 2012; 14:1596-9. [PMID: 22372610 DOI: 10.1021/ol300342n] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient enantioselective synthesis of cermizine D has been developed that exploits the use of a common intermediate to access over 85% of the carbon backbone. Key steps include an organocatalyzed heteroatom Michael addition, a diastereoselective alkylation with α-iodomethyl phenyl sulfide, a conjugate addition to a vinyl sulfone species, and a sulfone coupling/desulfurization sequence to join the two major subunits.
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Affiliation(s)
- Nagarathanam Veerasamy
- Department of Chemistry, 153 Gilbert Hall, Oregon State University, Corvallis, Oregon 97331, United States
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