1
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Dabbs J, Ericson MN, Dickie DA, Harman WD. Synthesis of 1-Azatriene Complexes of Tungsten: Metal-Promoted Ring-Opening of Dihydropyridine. Organometallics 2024; 43:1051-1056. [PMID: 38756990 PMCID: PMC11094799 DOI: 10.1021/acs.organomet.4c00108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 04/17/2024] [Accepted: 04/17/2024] [Indexed: 05/18/2024]
Abstract
For nearly a century, chemists have explored how transition-metal complexes can affect the physical and chemical properties of linear conjugated polyenes and heteropolyenes. While much has been written about higher hapticity complexes (η4-η6), less is known about the chemistry of their η2 analogues. Herein, we describe a general method for synthesizing 5,6-η2-(1-azatriene) tungsten complexes via a 6π-azaelectrocyclic dihydropyridine ring-opening that is promoted by the π-basic nature of {WTp(NO)(PMe3)}. This study includes detailed spectroscopic and crystallographic data for the η2-dihydropyridine and η2-1-azatriene complexes, both of which were prepared as single regio- and stereoisomers.
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Affiliation(s)
- Jonathan
D. Dabbs
- Department of Chemistry, University
of Virginia, Charlottesville, Virginia 22904, United States
| | - Megan N. Ericson
- Department of Chemistry, University
of Virginia, Charlottesville, Virginia 22904, United States
| | - Diane A. Dickie
- Department of Chemistry, University
of Virginia, Charlottesville, Virginia 22904, United States
| | - W. Dean Harman
- Department of Chemistry, University
of Virginia, Charlottesville, Virginia 22904, United States
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2
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Dabbs J, Ericson MN, Wilde JH, Lombardo RF, Ashcraft EC, Dickie DA, Harman WD. The Tungsten-Promoted Synthesis of Piperidyl-Modified erythro-Methylphenidate Derivatives. ACS CENTRAL SCIENCE 2023; 9:1775-1783. [PMID: 37780360 PMCID: PMC10540299 DOI: 10.1021/acscentsci.3c00556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Indexed: 10/03/2023]
Abstract
Due to its efficacy as a dopamine receptor agonist, methylphenidate (MPH) is of interest as a potential therapeutic for cocaine addiction. While numerous derivatives of MPH have been investigated for their potential medicinal value, functionalization of the piperidine ring has not been explored. The pyridine borane ligand in WTp(NO)(PMe3)(η2-pyBH3) is dearomatized by the metal and can be elaborated to the analogous η2-mesylpyridinium complex. Installing a methyl phenylacetate moiety at the C2' position via a Reformatsky reaction followed by a tandem protonation/nucleophilic addition sequence results in a library of erythro MPH analogues functionalized at the piperidyl C5' position. The functional group is added chemoselectively to C5', cis to the methyl phenylacetate. Repeating this procedure with an enantioenriched source of the tungsten reagent results in enantioenriched MPH derivatives. All identities of the newly reported compounds are supported by comprehensive 2D NMR and HRMS data or crystallographic data.
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Affiliation(s)
| | | | - Justin H. Wilde
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Rachel F. Lombardo
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Earl C. Ashcraft
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Diane A. Dickie
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - W. Dean Harman
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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3
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Li K, Lv Y, Lu Z, Yun X, Yan S. An environmentally benign multi-component reaction: Highly regioselective synthesis of functionalized 2-(diarylphosphoryl)-1,2-dihydro-pyridine derivatives. GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.10.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
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4
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Wilde JH, Dickie DA, Harman WD. A Highly Divergent Synthesis of 3-Aminotetrahydropyridines. J Org Chem 2020; 85:8245-8252. [PMID: 32434325 DOI: 10.1021/acs.joc.0c00853] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Dihapto-coordinate 1,2-dihydropyridine complexes of the metal fragment {WTp(NO)(PMe3)} (Tp = tris(pyrazolyl)borate), derived from pyridine, are demonstrated to undergo protonation at C6 followed by regioselective amination at C5 with a variety of primary and secondary amines. The addition takes place stereoselectively anti to the metal center, producing exclusively cis-disubstituted products. The resulting 1,2,5,6-tetrahydropyridines can be successfully liberated by oxidation, providing a route to novel molecules of potential medicinal interest.
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Affiliation(s)
- Justin H Wilde
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Diane A Dickie
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - W Dean Harman
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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5
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Affiliation(s)
- Justin H. Wilde
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Jeffery T. Myers
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Diane A. Dickie
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - W. Dean Harman
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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6
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Wilde JH, Smith JA, Dickie DA, Harman WD. Molybdenum-Promoted Synthesis of Isoquinuclidines with Bridgehead CF 3 Groups. J Am Chem Soc 2019; 141:18890-18899. [PMID: 31684729 DOI: 10.1021/jacs.9b10781] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The preparation of the complex MoTp(NO)(DMAP)(4,5-η2-(2-trifluoromethyl)pyridine) (DMAP = 4-(dimethylamino)pyridine; Tp = tris(pyrazolyl)borate) is described. The CF3 substituent is found to preclude κ-N coordination, allowing for direct coordination without protection of the nitrogen. The dihapto-coordinate complex can be isolated as a single diastereomer, methylated, and reacted with a range of nucleophiles. Oxidative decomplexation affords the free dihydropyridines in good yield (75-90%). As a demonstration of synthetic utility, a series of novel bridgehead CF3-substituted isoquinuclidines was prepared from these decomplexed dihydropyridines.
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Affiliation(s)
- Justin H Wilde
- Department of Chemistry , University of Virginia , Charlottesville , Virginia 22904 , United States
| | - Jacob A Smith
- Department of Chemistry , University of Virginia , Charlottesville , Virginia 22904 , United States
| | - Diane A Dickie
- Department of Chemistry , University of Virginia , Charlottesville , Virginia 22904 , United States
| | - W Dean Harman
- Department of Chemistry , University of Virginia , Charlottesville , Virginia 22904 , United States
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7
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Liebov BK, Harman WD. Group 6 Dihapto-Coordinate Dearomatization Agents for Organic Synthesis. Chem Rev 2017; 117:13721-13755. [DOI: 10.1021/acs.chemrev.7b00480] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Benjamin K. Liebov
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - W. Dean Harman
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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8
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Myers JT, Smith JA, Dakermanji SJ, Wilde JH, Wilson KB, Shivokevich PJ, Harman WD. Molybdenum(0) Dihapto-Coordination of Benzene and Trifluorotoluene: The Stabilizing and Chemo-Directing Influence of a CF 3 Group. J Am Chem Soc 2017; 139:11392-11400. [PMID: 28742967 DOI: 10.1021/jacs.7b05009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The preparation of the complexes TpMo(NO)(DMAP)(η2-PhCF3) (5) and TpMo(NO)(DMAP)(η2-benzene) (3) is described. The CF3 group is found to stabilize the metal-arene bond strength in 5 by roughly 3 kcal/mol compared to that in 3, allowing the large-scale synthesis and isolation of the trifluorotoluene analogue (5, 37 g, 70%). When a benzene solution of 5 is allowed to stand, clean conversion to the benzene analogue 3 occurs, and this complex may be precipitated from solution upon the addition of pentane and isolated. The trifluorotoluene complex is shown to be a synthetic precursor to functionalized cyclohexadienes: In solution, it selectively protonates at the ortho position, and the resulting η2-arenium species undergoes reactions with nucleophiles at the adjacent meta carbon. Thus, reactions of 5, triflic acid, and either N-methylpyrrole or 1-methoxy-2-methyl-1-(trimethylsilyloxy)-1-propene result in 5-substituted-1,3-cyclohexadienes after removal of the metal.
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Affiliation(s)
- Jeffery T Myers
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Jacob A Smith
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Steven J Dakermanji
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Justin H Wilde
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Katy B Wilson
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Philip J Shivokevich
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - W Dean Harman
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
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9
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Lankenau AW, Iovan DA, Pienkos JA, Salomon RJ, Wang S, Harrison DP, Myers WH, Harman WD. Enantioenrichment of a Tungsten Dearomatization Agent Utilizing Chiral Acids. J Am Chem Soc 2015; 137:3649-55. [DOI: 10.1021/jacs.5b00490] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Andrew W. Lankenau
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Diana A. Iovan
- Department
of Chemistry, University of Richmond, Richmond, Virginia 23173, United States
| | - Jared A. Pienkos
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Rebecca J. Salomon
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Sisi Wang
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Daniel P. Harrison
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - William H. Myers
- Department
of Chemistry, University of Richmond, Richmond, Virginia 23173, United States
| | - W. Dean Harman
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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10
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Agrawal NR, Bahekar SP, Sarode PB, Zade SS, Chandak HS. l-Proline nitrate: a recyclable and green catalyst for the synthesis of highly functionalized piperidines. RSC Adv 2015. [DOI: 10.1039/c5ra08022c] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Multi-component synthesis of highly functionalized piperidines has been demonstrated using ‘fully green’ l-proline nitrate as recyclable room temperature ionic liquid. Recycling of the catalyst was possible up to five runs without loss of catalyst activity.
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Affiliation(s)
- Nikita R. Agrawal
- Department of Chemistry
- G. S. Science, Arts and Commerce College
- Khamgaon 444303
- India
| | - Sandeep P. Bahekar
- Department of Chemistry
- G. S. Science, Arts and Commerce College
- Khamgaon 444303
- India
| | - Prashant B. Sarode
- Department of Chemistry
- G. S. Science, Arts and Commerce College
- Khamgaon 444303
- India
| | - Sanjio S. Zade
- Department of Chemical Sciences
- Indian Institute of Science Education and Research (IISER)
- Kolkata
- India
| | - Hemant S. Chandak
- Department of Chemistry
- G. S. Science, Arts and Commerce College
- Khamgaon 444303
- India
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11
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McSkimming A, Colbran SB. The coordination chemistry of organo-hydride donors: new prospects for efficient multi-electron reduction. Chem Soc Rev 2013; 42:5439-88. [PMID: 23507957 DOI: 10.1039/c3cs35466k] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In biological reduction processes the dihydronicotinamides NAD(P)H often transfer hydride to an unsaturated substrate bound within an enzyme active site. In many cases, metal ions in the active site bind, polarize and thereby activate the substrate to direct attack by hydride from NAD(P)H cofactor. This review looks more widely at the metal coordination chemistry of organic donors of hydride ion--organo-hydrides--such as dihydronicotinamides, other dihydropyridines including Hantzsch's ester and dihydroacridine derivatives, those derived from five-membered heterocycles including the benzimidazolines and benzoxazolines, and all-aliphatic hydride donors such as hexadiene and hexadienyl anion derivatives. The hydride donor properties--hydricities--of organo-hydrides and how these are affected by metal ions are discussed. The coordination chemistry of organo-hydrides is critically surveyed and the use of metal-organo-hydride systems in electrochemically-, photochemically- and chemically-driven reductions of unsaturated organic and inorganic (e.g. carbon dioxide) substrates is highlighted. The sustainable electrocatalytic, photochemical or chemical regeneration of organo-hydrides such as NAD(P)H, including for driving enzyme-catalysed reactions, is summarised and opportunities for development are indicated. Finally, new prospects are identified for metal-organo-hydride systems as catalysts for organic transformations involving 'hydride-borrowing' and for sustainable multi-electron reductions of unsaturated organic and inorganic substrates directly driven by electricity or light or by renewable reductants such as formate/formic acid.
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Affiliation(s)
- Alex McSkimming
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia
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12
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Ischay MA, Takase MK, Bergman RG, Ellman JA. Unstabilized azomethine ylides for the stereoselective synthesis of substituted piperidines, tropanes, and azabicyclo[3.1.0] systems. J Am Chem Soc 2013; 135:2478-81. [PMID: 23398467 DOI: 10.1021/ja312311k] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Acid treatment of densely substituted 2-silyl-1,2-dihydropyridines provides a new and convenient entry to reactive azomethine ylides that can (1) be protonated and reduced with high stereoselectivity to give piperidines, (2) participate in [3 + 2] dipolar cycloaddition to give tropanes, and (3) undergo a Nazarov-like 6-π electrocyclization that upon reduction give 2-azabicyclo[3.1.0] systems.
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Affiliation(s)
- Michael A Ischay
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, USA
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13
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Martin RM, Bergman RG, Ellman JA. Synthesis of isoquinuclidines from highly substituted dihydropyridines via the Diels-Alder reaction. Org Lett 2013; 15:444-7. [PMID: 23320852 PMCID: PMC3570756 DOI: 10.1021/ol303040r] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A stereo- and regioselective Diels-Alder reaction for the synthesis of highly substituted isoquinuclidines from dihydropyridines and electron-deficient alkenes has been developed. While reactions with activated dienophiles proceed readily under thermal conditions, the use of Lewis acid additives is necessary to facilitate cycloadditions for less reactive alkenes. This procedure affords the target compounds in high yields and diastereoselectivities.
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Affiliation(s)
- Rhia M Martin
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, USA
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14
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Wang J, Cai D, Zhang M, Wang M. The addition mechanism of TMSCN into N-acetylpyridinum to give 2-cyanoacetylpyridinum: The roles of TpW(NO)(PMe3) and DABCO. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2012.10.044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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15
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Espinal Viguri M, Huertos MA, Pérez J, Riera L, Ara I. Re-Mediated C–C Coupling of Pyridines and Imidazoles. J Am Chem Soc 2012. [DOI: 10.1021/ja310981m] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Maialen Espinal Viguri
- Departamento de Química
Orgánica e Inorgánica-IUQOEM, Universidad de Oviedo-CSIC, C/Julián Clavería, 8,
33006 Oviedo-Spain
| | - Miguel A. Huertos
- Departamento de Química
Orgánica e Inorgánica-IUQOEM, Universidad de Oviedo-CSIC, C/Julián Clavería, 8,
33006 Oviedo-Spain
| | - Julio Pérez
- Departamento de Química
Orgánica e Inorgánica-IUQOEM, Universidad de Oviedo-CSIC, C/Julián Clavería, 8,
33006 Oviedo-Spain
| | - Lucía Riera
- Instituto
de Síntesis Química
y Catálisis Homogénea, Departamento de Química
Inorgánica, CSIC-Universidad de Zaragoza, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
| | - Irene Ara
- Instituto
de Síntesis Química
y Catálisis Homogénea, Departamento de Química
Inorgánica, CSIC-Universidad de Zaragoza, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain
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16
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Dong L, Wen J, Qin S, Yang N, Yang H, Su Z, Yu X, Hu C. Iron-Catalyzed Direct Suzuki–Miyaura Reaction: Theoretical and Experimental Studies on the Mechanism and the Regioselectivity. ACS Catal 2012. [DOI: 10.1021/cs300028y] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Liang Dong
- Key Laboratory of Green Chemistry and Technology, Ministry
of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Jun Wen
- Key Laboratory of Green Chemistry and Technology, Ministry
of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Song Qin
- Key Laboratory of Green Chemistry and Technology, Ministry
of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Na Yang
- Key Laboratory of Green Chemistry and Technology, Ministry
of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Huaqing Yang
- Key Laboratory of Green Chemistry and Technology, Ministry
of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Zhishan Su
- Key Laboratory of Green Chemistry and Technology, Ministry
of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Xiaoqi Yu
- Key Laboratory of Green Chemistry and Technology, Ministry
of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
| | - Changwei Hu
- Key Laboratory of Green Chemistry and Technology, Ministry
of Education, College of Chemistry, Sichuan University, Chengdu 610064, People's Republic of China
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17
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Duttwyler S, Lu C, Rheingold AL, Bergman RG, Ellman JA. Highly diastereoselective synthesis of tetrahydropyridines by a C-H activation-cyclization-reduction cascade. J Am Chem Soc 2012; 134:4064-7. [PMID: 22356093 PMCID: PMC3319108 DOI: 10.1021/ja2119833] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A versatile reaction cascade leading to highly substituted 1,2,3,6-tetrahydropyridines has been developed. It comprises rhodium(I)-catalyzed C-H activation-alkyne coupling followed by electrocyclization and subsequent acid/borohydride-promoted reduction. This one-pot procedure affords the target compounds in up to 95% yield with >95% diastereomeric purity.
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Affiliation(s)
- Simon Duttwyler
- Department of Chemistry, Yale University, New Haven, Connecticut, United States
| | - Colin Lu
- Department of Chemistry, Yale University, New Haven, Connecticut, United States
| | - Arnold L. Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, United States
| | - Robert G. Bergman
- Division of Chemical Sciences, Lawrence Berkeley National Laboratory, Berkeley, California, United States
| | - Jonathan A. Ellman
- Department of Chemistry, Yale University, New Haven, Connecticut, United States
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18
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Bull JA, Mousseau JJ, Pelletier G, Charette AB. Synthesis of pyridine and dihydropyridine derivatives by regio- and stereoselective addition to N-activated pyridines. Chem Rev 2012; 112:2642-713. [PMID: 22352938 DOI: 10.1021/cr200251d] [Citation(s) in RCA: 693] [Impact Index Per Article: 57.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- James A Bull
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, UK
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19
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Harrison DP, Iovan DA, Myers WH, Sabat M, Wang S, Zottig VE, Harman WD. [4 + 2] Cyclocondensation reactions of tungsten-dihydropyridine complexes and the generation of tri- and tetrasubstituted piperidines. J Am Chem Soc 2011; 133:18378-87. [PMID: 21961580 DOI: 10.1021/ja2075086] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new method for the preparation of functionalized piperidines is described in which various dihydropyridine (DHP) complexes of {TpW(NO)(PMe(3))} that are derived from pyridine-borane undergo [4 + 2] cyclocondensation with enones, enals, nitrosobenzene, and several isocyanates to form [2.2.2] bicyclic species. In several cases the diazabicyclooctene products derived from DHP complexes and isocyanates can be further elaborated into novel syn-2,5-disubstituted and 2,3,6-trisubstituted piperidinamides.
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Affiliation(s)
- Daniel P Harrison
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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20
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Mukhopadhyay C, Rana S, Butcher RJ, Schmiedekamp AM. First report of syn isomers in the diastereoselective synthesis of highly functionalized piperidines catalysed by wet picric acid: factors influencing the syn–anti ratios. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.08.140] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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21
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Peng B, Zhang S, Yu X, Feng X, Bao M. Nucleophilic Dearomatization of Chloromethyl Naphthalene Derivatives via η3-Benzylpalladium Intermediates: A New Strategy for Catalytic Dearomatization. Org Lett 2011; 13:5402-5. [DOI: 10.1021/ol2023278] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Bo Peng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Sheng Zhang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Xiaoqiang Yu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Xiujuan Feng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Ming Bao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
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22
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Crotti S, Berti F, Pineschi M. Copper-catalyzed Perkin-acyl-Mannich reaction of acetic anhydride with pyridine: expeditious entry to unconventional piperidines. Org Lett 2011; 13:5152-5. [PMID: 21894883 DOI: 10.1021/ol202027k] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A regioselective introduction of a methoxycarbonyl methyl group at the C(2) position of unsubstituted pyridine has been accomplished with catalytic amounts of copper(II) triflate in mild reaction conditions. The N-acetyl-1,2-dihydropyridyl acetic acid methyl ester obtained is a valuable building block for the synthesis of new polyfunctionalized piperidine derivatives bearing unconventional substitution patterns.
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Affiliation(s)
- Stefano Crotti
- Dipartimento di Scienze Farmaceutiche, Sede di Chimica Bioorganica e Biofarmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy
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Wong H, Garnier-Amblard EC, Liebeskind LS. Organometallic enantiomeric scaffolding: a strategy for the enantiocontrolled construction of regio- and stereodivergent trisubstituted piperidines from a common precursor. J Am Chem Soc 2011; 133:7517-27. [PMID: 21513336 PMCID: PMC3107969 DOI: 10.1021/ja201012p] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Reported herein is a general and efficient method to construct 2,3,6-trisubstituted piperidines in a substituent-independent fashion. From the high enantiopurity organometallic scaffold (-)-Tp(CO)(2)[(η-2,3,4)-(1S,2S)-1-benzyloxycarbonyl-5-oxo-5,6-dihydro-2H-pyridin-2-yl)molybdenum (Tp = hydridotrispyrazolylborato), a variety of TpMo(CO)(2)-based 2,3,6-trifunctionalized complexes of the (η-3,4,5-dihydropyridinyl) ligand were easily obtained in 5 steps through a sequence of highly regio- and stereospecific metal-influenced transformations (15 examples). From the 2,3,6-trifunctionalized molybdenum complexes, either 2,6-cis-3-trans or 2,3,6-cis systems were selectively obtained through the choice of an appropriate stereodivergent demetalation protocol. The potential of this strategy in synthetic chemistry was demonstrated by the short total synthesis of four natural and one non-natural alkaloids: indolizidines (±)-209I and (±)-8-epi-219F in the racemic series, and enantiocontrolled syntheses of (-)-indolizidine 251N, (-)-quinolizidine 251AA, and (-)-dehydroindolizidine 233E.
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Affiliation(s)
| | | | - Lanny S. Liebeskind
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia, 30322
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Liebov BK, Weigle CE, Keinath KV, Leap JE, Pike RD, Keane JM. Topological Variations of the PDP Ligand and Its Prospects in Molybdenum(0) Dearomatization Agents. Inorg Chem 2011; 50:4677-9. [PMID: 21524083 DOI: 10.1021/ic200403t] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Benjamin K. Liebov
- Department of Chemistry, Muhlenberg College, 2400 W. Chew Street, Allentown, Pennsylvania 18104, United States
| | - Caitlin E. Weigle
- Department of Chemistry, Muhlenberg College, 2400 W. Chew Street, Allentown, Pennsylvania 18104, United States
| | - Kyle V. Keinath
- Department of Chemistry, Muhlenberg College, 2400 W. Chew Street, Allentown, Pennsylvania 18104, United States
| | - Jennifer E. Leap
- Department of Chemistry, Muhlenberg College, 2400 W. Chew Street, Allentown, Pennsylvania 18104, United States
| | - Robert D. Pike
- Department of Chemistry, The College of William and Mary, 540 Landrum Drive, Williamsburg, Virginia 23185, United States
| | - Joseph M. Keane
- Department of Chemistry, Muhlenberg College, 2400 W. Chew Street, Allentown, Pennsylvania 18104, United States
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25
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Harrison DP, Nichols-Nielander AC, Zottig VE, Strausberg L, Salomon RJ, Trindle CO, Sabat M, Gunnoe TB, Iovan DA, Myers WH, Harman WD. Hyperdistorted Tungsten Allyl Complexes and Their Stereoselective Deprotonation to Form Dihapto-Coordinated Dienes. Organometallics 2011. [DOI: 10.1021/om200183m] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Daniel P. Harrison
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | | | - Victor E. Zottig
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Laura Strausberg
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Rebecca J. Salomon
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Carl O. Trindle
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Michal Sabat
- Nanoscale Materials Characterization Facility, Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - T. Brent Gunnoe
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Diana A. Iovan
- Department of Chemistry, University of Richmond, Richmond, Virginia 27173, United States
| | - William H. Myers
- Department of Chemistry, University of Richmond, Richmond, Virginia 27173, United States
| | - W. Dean Harman
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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