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Llobat A, Escorihuela J, Ramírez de Arellano C, Fustero S, Medio-Simón M. Intramolecular rhodium-catalysed [2 + 2 + 2] cycloaddition of linear chiral N-bridged triynes: straightforward access to fused tetrahydroisoquinoline core. Org Biomol Chem 2022; 20:2433-2445. [PMID: 35274117 DOI: 10.1039/d2ob00340f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A route for the preparation of merged symmetrical tetrahydroisoquinolines with central chirality through a rhodium-catalyzed intramolecular [2 + 2 + 2] cycloaddition involving enantiopure triynes as substrates is described. The results show that linear triynes lacking a 3-atom tether can undergo efficient cyclisation. The N-tethered 1,7,13-triynes used in our approach were easily prepared from readily accessible chiral homopropargyl amides, the basic building blocks in our approach, which were efficiently obtained by diastereoselective addition of propargyl magnesium bromide to Ellman imines. Additional substitution at the benzene rings could be attained when substituted triynes at the terminal triple bonds were employed, giving access to more complex tetrahydroisoquinolines after the rhodium-catalyzed intramolecular [2 + 2 + 2] cycloaddition. Among the different transition-metal catalysts, the Wilkinson complex (RhCl(PPh3)3) afforded higher yields in the cyclisation of linear triynes; however, triynes bearing a Br substituent at the terminal positions underwent the cyclisation more efficiently in the presence of [RhCl(CO)2]2.
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Affiliation(s)
- Alberto Llobat
- Departamento de Química Orgánica, Universitat de València, Avda. Vicent Andrés Estellés s/n, Burjassot, 46100 Valencia, Spain
| | - Jorge Escorihuela
- Departamento de Química Orgánica, Universitat de València, Avda. Vicent Andrés Estellés s/n, Burjassot, 46100 Valencia, Spain
| | - Carmen Ramírez de Arellano
- Departamento de Química Orgánica, Universitat de València, Avda. Vicent Andrés Estellés s/n, Burjassot, 46100 Valencia, Spain
| | - Santos Fustero
- Departamento de Química Orgánica, Universitat de València, Avda. Vicent Andrés Estellés s/n, Burjassot, 46100 Valencia, Spain
| | - Mercedes Medio-Simón
- Departamento de Química Orgánica, Universitat de València, Avda. Vicent Andrés Estellés s/n, Burjassot, 46100 Valencia, Spain
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2
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Llobat A, Escorihuela J, Fustero S, Medio-Simón M. Diastereoselectivity of the Addition of Propargylic Magnesium Reagents to Fluorinated Aromatic Sulfinyl Imines. Org Lett 2021; 23:3691-3695. [PMID: 33881896 PMCID: PMC9490847 DOI: 10.1021/acs.orglett.1c01076] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
![]()
The
addition of propargylmagnesium bromide to fluorinated aromatic
sulfinyl imines gave homopropargyl amines with total regio- and diastereoselection.
Complete reversal of diastereoselectivity can be achieved in some
cases using coordinating (THF) or noncoordinating (DCM) solvents.
Substituted propargylic magnesium reagents have been also tested toward
fluorinated aryl sulfinyl imines affording chiral homoallenyl amines
with good yields and selectivity control. DFT calculations helped
to rationalize the origin of the experimental regio- and diastereoselectivities
observed in each case.
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Affiliation(s)
- Alberto Llobat
- Departamento de Química Orgánica, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, València, Spain
| | - Jorge Escorihuela
- Departamento de Química Orgánica, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, València, Spain
| | - Santos Fustero
- Departamento de Química Orgánica, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, València, Spain
| | - Mercedes Medio-Simón
- Departamento de Química Orgánica, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, València, Spain
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3
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Escorihuela J, Sedgwick DM, Llobat A, Medio-Simón M, Barrio P, Fustero S. Pauson-Khand reaction of fluorinated compounds. Beilstein J Org Chem 2020; 16:1662-1682. [PMID: 32733610 PMCID: PMC7372243 DOI: 10.3762/bjoc.16.138] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 07/02/2020] [Indexed: 12/11/2022] Open
Abstract
The Pauson-Khand reaction (PKR) is one of the key methods for the construction of cyclopentenone derivatives, which can in turn undergo diverse chemical transformations to yield more complex biologically active molecules. Despite the increasing availability of fluorinated building blocks and methodologies to incorporate fluorine in compounds with biological interest, there have been few significant advances focused on the fluoro-Pauson-Khand reaction, both in the inter- and intramolecular versions. Furthermore, the use of vinyl fluorides as olefinic counterparts had been completely overlooked. In this review, we collect the advances both on the stoichiometric and catalytic intermolecular and intramolecular fluoro-Pauson-Khand reaction, with special attention to the PKR of enynes containing a fluoride moiety.
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Affiliation(s)
- Jorge Escorihuela
- Departamento de Química Orgánica, Facultad de Farmacia, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain
| | - Daniel M Sedgwick
- Departamento de Química Orgánica, Facultad de Farmacia, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain
| | - Alberto Llobat
- Departamento de Química Orgánica, Facultad de Farmacia, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain
| | - Mercedes Medio-Simón
- Departamento de Química Orgánica, Facultad de Farmacia, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain
| | - Pablo Barrio
- Departmento de Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo, Av. Julián Clavería 8, Campus Universitario de El Cristo, 33006 Oviedo, Spain
| | - Santos Fustero
- Departamento de Química Orgánica, Facultad de Farmacia, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain
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4
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Llobat A, Román R, Mateu N, Sedgwick DM, Barrio P, Medio-Simón M, Fustero S. The Fluoro-Pauson-Khand Reaction in the Synthesis of Enantioenriched Nitrogenated Bicycles Bearing a Quaternary C-F Stereogenic Center. Org Lett 2019; 21:7294-7297. [PMID: 31478678 DOI: 10.1021/acs.orglett.9b02557] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A variety of enantioenriched fluorinated 6H-cyclopenta[c]pyridin-6-one bicycles, a scaffold present in several classes of monoterpenic alkaloids with varied biological activity, were synthesized in just five steps from simple aldehyde starting materials. The synthesis presented wide functional group tolerance and moderate to high yields and diastereoselectivities and could be carried out on a gram scale. These products were suitable for further transformations, such as hydrogenation and deprotection of the tert-butylsulfonyl protecting group.
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Affiliation(s)
- Alberto Llobat
- Departmento de Química Orgánica , Universitat de València , 46100 Burjassot , Spain
| | - Raquel Román
- Departmento de Química Orgánica , Universitat de València , 46100 Burjassot , Spain
| | - Natalia Mateu
- Laboratorio de Moléculas Orgánicas , Centro de Investigación Príncipe Felipe , 46012 Valencia , Spain
| | - Daniel M Sedgwick
- Departmento de Química Orgánica , Universitat de València , 46100 Burjassot , Spain
| | - Pablo Barrio
- Departamento de Química Orgánica e Inorgánica, Faculdad de Química , Universidad de Oviedo , Avda. Julián Clavería no. 8 , 33006 Oviedo , Spain
| | - Mercedes Medio-Simón
- Departmento de Química Orgánica , Universitat de València , 46100 Burjassot , Spain
| | - Santos Fustero
- Departmento de Química Orgánica , Universitat de València , 46100 Burjassot , Spain.,Laboratorio de Moléculas Orgánicas , Centro de Investigación Príncipe Felipe , 46012 Valencia , Spain
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5
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Bellezza D, Noverges B, Fasano F, Sarmiento JT, Medio-Simón M, Asensio G. Palladium-Catalyzed C-C Ring Closure in α-Chloromethylimines: Synthesis of 1H
-Indoles. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Delia Bellezza
- Department of Organic Chemistry; University of Valencia; Ave Vicent Andrés Estellés s/n Spain
| | - Bárbara Noverges
- Department of Organic Chemistry; University of Valencia; Ave Vicent Andrés Estellés s/n Spain
| | - Francesco Fasano
- Department of Organic Chemistry; University of Valencia; Ave Vicent Andrés Estellés s/n Spain
| | - Jeymy T. Sarmiento
- Department of Organic Chemistry; University of Valencia; Ave Vicent Andrés Estellés s/n Spain
| | - Mercedes Medio-Simón
- Department of Organic Chemistry; University of Valencia; Ave Vicent Andrés Estellés s/n Spain
| | - Gregorio Asensio
- Department of Organic Chemistry; University of Valencia; Ave Vicent Andrés Estellés s/n Spain
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6
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Noverges Pedro B, Medio-Simón M, Jutand A. Influence of the Ligand of Palladium(0) Complexes on the Rate of the Oxidative Addition of Aryl and Activated Alkyl Bromides: Csp2
−Br versus Csp3
−Br Reactivity and Selectivity. ChemCatChem 2017. [DOI: 10.1002/cctc.201700041] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bárbara Noverges Pedro
- Ecole Normale Supérieure-PSL Research University; Département de Chimie; Sorbonne Universités-UPMC Univ Paris 06, CNRS UMR 8640 PASTEUR; 24 Rue Lhomond, F- 75231 Paris Cedex 5 France
| | - Mercedes Medio-Simón
- Departament de Química Orgànica; Universitat de València; Avda. Vicent Andrés Estellés s/n 46100 Burjassot-Valencia Spain
| | - Anny Jutand
- Ecole Normale Supérieure-PSL Research University; Département de Chimie; Sorbonne Universités-UPMC Univ Paris 06, CNRS UMR 8640 PASTEUR; 24 Rue Lhomond, F- 75231 Paris Cedex 5 France
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7
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Gimeno A, Rodríguez-Gimeno A, Cuenca AB, Ramírez de Arellano C, Medio-Simón M, Asensio G. Gold(i)-catalysed cascade reactions in the synthesis of 2,3-fused indole derivatives. Chem Commun (Camb) 2015; 51:12384-7. [DOI: 10.1039/c5cc04606h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Unactivated alkenes and 1,3-unsubstituted indoles in gold(i)-catalysed hydroaminative/arylative cascade cyclizations.
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Affiliation(s)
- Ana Gimeno
- Departamento de Química Orgánica
- Universidad de Valencia
- Valencia
- Spain
| | | | - Ana B. Cuenca
- Departamento de Química Orgánica
- Universidad de Valencia
- Valencia
- Spain
| | | | | | - Gregorio Asensio
- Departamento de Química Orgánica
- Universidad de Valencia
- Valencia
- Spain
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8
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Noverges B, Medio-Simón M, Asensio G. Palladium-Catalyzed Alkoxy- and Aminocarbonylation of α-Halomethyl Oxime Ethers: Synthesis of 1,3-Alkoxyimino Esters and 1,3-Alkoxyimino Amides. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400710] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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9
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Noverges B, Medio-Simón M, Asensio G. Palladium-Catalyzed Suzuki Carbonylative Reaction of α-Halomethyl Oxime Ethers: A Regioselective Route to Unsymmetrical 1,3-Oxyiminoketones. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400442] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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10
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Rodríguez-Gimeno A, Cuenca AB, Gil-Tomás J, Medio-Simón M, Olmos A, Asensio G. FeCl3·6H2O-Catalyzed Mukaiyama-Aldol Type Reactions of Enolizable Aldehydes and Acetals. J Org Chem 2014; 79:8263-70. [DOI: 10.1021/jo501498a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Alejandra Rodríguez-Gimeno
- Departamento
de Química Orgánica, Universidad de Valencia, Avda. Vicente Andrés
Estellés, s/n 46100 Burjassot, Valencia, Spain
| | - Ana B. Cuenca
- Departamento
de Química Orgánica, Universidad de Valencia, Avda. Vicente Andrés
Estellés, s/n 46100 Burjassot, Valencia, Spain
| | - Jesús Gil-Tomás
- Departamento
de Química Orgánica, Universidad de Valencia, Avda. Vicente Andrés
Estellés, s/n 46100 Burjassot, Valencia, Spain
| | - Mercedes Medio-Simón
- Departamento
de Química Orgánica, Universidad de Valencia, Avda. Vicente Andrés
Estellés, s/n 46100 Burjassot, Valencia, Spain
| | - Andrea Olmos
- Laboratorio
de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro
de Investigación en Química Sostenible, Universidad de Huelva, Campus El Carmen, 21007 Huelva, Spain
| | - Gregorio Asensio
- Departamento
de Química Orgánica, Universidad de Valencia, Avda. Vicente Andrés
Estellés, s/n 46100 Burjassot, Valencia, Spain
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11
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Gimeno A, Cuenca AB, Suárez-Pantiga S, de Arellano CR, Medio-Simón M, Asensio G. Competitive Gold-Activation Modes in Terminal Alkynes: An Experimental and Mechanistic Study. Chemistry 2013; 20:683-8. [DOI: 10.1002/chem.201304087] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Indexed: 01/14/2023]
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12
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Noverges B, Mollar C, Medio-Simón M, Asensio G. Palladium-Catalyzed Suzuki-Miyaura Cross-Coupling of α-Halomethyl Oxime Ethers and Site-Selective Cross-Coupling of Dihalo Derivatives. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300444] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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13
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Mollar C, Ramirez de Arellano C, Medio-Simón M, Asensio G. Switchable Palladium-Catalyst Reaction of Bromomethyl Sulfoxides, CO, and N-Nucleophiles: Aminocarbonylation at Csp3 versus Oxidative Carbonylation of Amines. J Org Chem 2012; 77:9693-701. [DOI: 10.1021/jo301778n] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Cristian Mollar
- Departamento de Química Orgánica, Universidad de Valencia, 46100-Burjassot, Valencia,
Spain
| | | | - Mercedes Medio-Simón
- Departamento de Química Orgánica, Universidad de Valencia, 46100-Burjassot, Valencia,
Spain
| | - Gregorio Asensio
- Departamento de Química Orgánica, Universidad de Valencia, 46100-Burjassot, Valencia,
Spain
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14
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Mollar C, Besora M, Maseras F, Asensio G, Medio-Simón M. Competitive and Selective Csp3Br versus Csp2Br Bond Activation in Palladium-Catalysed Suzuki Cross-Coupling: An Experimental and Theoretical Study of the Role of Phosphine Ligands. Chemistry 2010; 16:13390-7. [DOI: 10.1002/chem.201001113] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Asensio G, Cuenca AB, Esteruelas MA, Medio-Simón M, Oliván M, Valencia M. Osmium(III) Complexes with POP Pincer Ligands: Preparation from Commercially Available OsCl3·3H2O and Their X-ray Structures. Inorg Chem 2010; 49:8665-7. [DOI: 10.1021/ic101498h] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gregorio Asensio
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Valencia, Spain
| | - Ana B. Cuenca
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Valencia, Spain
| | - Miguel A. Esteruelas
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza, CSIC, 50009 Zaragoza, Spain
| | - Mercedes Medio-Simón
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Valencia, Spain
| | - Montserrat Oliván
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza, CSIC, 50009 Zaragoza, Spain
| | - Marta Valencia
- Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza, CSIC, 50009 Zaragoza, Spain
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16
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Mancha G, Cuenca AB, Rodríguez N, Medio-Simón M, Asensio G. Efficient synthesis of racemic and chiral alkenyl sulfoxides by palladium-catalyzed Suzuki coupling. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.06.050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Mejías N, Pleixats R, Shafir A, Medio-Simón M, Asensio G. Water-Soluble Palladium Nanoparticles: Click Synthesis and Applications as a Recyclable Catalyst in Suzuki Cross-Couplings in Aqueous Media. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000671] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Gimeno A, Medio-Simón M, de Arellano CR, Asensio G, Cuenca AB. NHC-Stabilized Gold(I) Complexes: Suitable Catalysts for 6-exo-dig Heterocyclization of 1-(o-Ethynylaryl)ureas. Org Lett 2010; 12:1900-3. [DOI: 10.1021/ol100595s] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ana Gimeno
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Burjassot, Valencia, Spain
| | - Mercedes Medio-Simón
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Burjassot, Valencia, Spain
| | | | - Gregorio Asensio
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Burjassot, Valencia, Spain
| | - Ana B. Cuenca
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Burjassot, Valencia, Spain
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19
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Cuenca AB, Montserrat S, Hossain KM, Mancha G, Lledós A, Medio-Simón M, Ujaque G, Asensio G. Gold(I)-Catalyzed Intermolecular Oxyarylation of Alkynes: Unexpected Regiochemistry in the Alkylation of Arenes. Org Lett 2009; 11:4906-9. [DOI: 10.1021/ol9020578] [Citation(s) in RCA: 140] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ana B. Cuenca
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Burjassot, Valencia, Spain, and Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Catalonia, Spain
| | - Sergi Montserrat
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Burjassot, Valencia, Spain, and Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Catalonia, Spain
| | - Kabir M. Hossain
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Burjassot, Valencia, Spain, and Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Catalonia, Spain
| | - Gisela Mancha
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Burjassot, Valencia, Spain, and Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Catalonia, Spain
| | - Agustí Lledós
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Burjassot, Valencia, Spain, and Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Catalonia, Spain
| | - Mercedes Medio-Simón
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Burjassot, Valencia, Spain, and Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Catalonia, Spain
| | - Gregori Ujaque
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Burjassot, Valencia, Spain, and Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Catalonia, Spain
| | - Gregorio Asensio
- Departamento de Química Orgánica, Universidad de Valencia, 46100 Burjassot, Valencia, Spain, and Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Catalonia, Spain
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20
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Abstract
An efficient and broad-scoped method for the preparation of unsymmetrical ethers from alcohols catalysed by the simplest and least expensive gold catalyst, NaAuCl(4), is described for the first time. The procedure enables the etherification of benzylic and tertiary alcohols with moderate to good yields under mild conditions with low catalyst loading. Symmetrical ethers, the usual side products in the etherification of alcohols, were not detected in this case. The formation of the racemic ether from a chiral benzyl alcohol suggests the intermediacy of a carbocation, which has not previously been postulated for gold-catalysed reactions involving alcohols.
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Affiliation(s)
- Ana B Cuenca
- Departamento de Quimica Organica, Universidad de Valencia, Avda Vicent Andres Estelles s/n, Valencia, Spain
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21
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Rodríguez N, Ramírez de Arellano C, Asensio G, Medio-Simón M. Palladium-catalyzed Suzuki-Miyaura reaction involving a secondary sp3 carbon: studies of stereochemistry and scope of the reaction. Chemistry 2007; 13:4223-9. [PMID: 17330314 DOI: 10.1002/chem.200601488] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Palladium-catalyzed C--C bond formation involving secondary sp3-hybridized carbon is described. These reactions occur with secondary 1-bromoethyl arylsulfoxides and different arylboronic acids, to produce the corresponding arylated sulfoxides in moderate to high yields and with complete stereospecificity. Despite the presence of beta hydrogens in the substrate, the competitive beta-hydride elimination is not a significant side reaction when coordinating solvents are used. The reported cross-coupling involves secondary C(sp3)--C(sp2) bond formation: this is the first time that a mechanistic study has been carried out with such substrates. The reaction proceeds with inversion of configuration at the stereogenic C(sp3) carbon. The high stereospecificity of the coupling and the mildness of the reaction conditions allow for the preservation of the optical purities of reagents and products and the preparation of useful chiral targets.
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Affiliation(s)
- Nuria Rodríguez
- Departamento de Química Orgánica, Universidad de Valencia, Burjassot-Valencia, Spain
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Rodríguez N, Medio-Simón M, Asensio G. Anaerobic Palladium-Catalyzed Chemoselective Oxidation of Allylic and Benzylic Alcohols with α-Bromo Sulfoxide as a Co-oxidant. Adv Synth Catal 2007. [DOI: 10.1002/adsc.200600394] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Medio-Simón M, Mollar C, Rodríguez N, Asensio G. First Synthesis of β-Keto Sulfoxides by a Palladium-Catalyzed Carbonylative Suzuki Reaction. Org Lett 2005; 7:4669-72. [PMID: 16209506 DOI: 10.1021/ol0518737] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] An unprecedented palladium-catalyzed three-component cross-coupling reaction between alpha-bromo sulfoxide, carbon monoxide, and aromatic boronic acids provides a new and efficient approach to the synthesis of beta-ketosulfoxides. The reaction takes place under mild conditions with a wide range of variously substituted aryl and heteroaryl boronic acids. The carbonylative cross-coupling reaction is strongly favored over competing direct cross-coupling and homocoupling processes, except with boronic acids carrying strong electron-withdrawing substituents.
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Affiliation(s)
- Mercedes Medio-Simón
- Departamento de Química Orgánica, Universidad de Valencia, Avda Vicent Andres Estelles s/n, 46100 Burjassot, Spain
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Medio-Simón M, Alemán P, Cuenca A, Gil J, Rodríguez N, Asensio G. From overstoichiometric to substoichiometric enantioselective protonation with 2-sulfinyl alcohols: A view in perspective. ARKIVOC 2005. [DOI: 10.3998/ark.5550190.0006.924] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Rodríguez N, Cuenca A, Ramírez de Arellano C, Medio-Simón M, Peine D, Asensio G. Palladium-Catalyzed Reaction of Boronic Acids with Chiral and Racemic α-Bromo Sulfoxides. J Org Chem 2004; 69:8070-6. [PMID: 15527292 DOI: 10.1021/jo0487552] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Palladium-catalyzed cross-coupling reactions of racemic alpha-bromo sulfoxides with boronic acids are carried out in either aqueous or nonaqueous medium with formation of a new C sp(3)-C sp(2) bond. The arylation of chiral alpha-bromo sulfoxides occurs without racemization. The cross-coupling reaction is general and gives high yields with arylboronic acids substituted with either donor or acceptor groups but gives poor results with heteroarylboronic acids. The best yields are obtained using degassed solvents and CsF instead of aqueous base. The use of aqueous base and the presence of oxygen favor the homocoupling side reaction.
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Affiliation(s)
- Nuria Rodríguez
- Departamento de Química Orgánica, Universidad de Valencia, Avda. Vicent Andres Estelles s/n, 46100 Burjassot, Spain
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Asensio G, Cuenca A, Rodriguez N, Medio-Simón M. Synthesis of an enantiopure 2-arylcyclohexanols from prochiral enol acetates by an enantioselective protonation/diastereoselective reduction sequence. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/j.tetasy.2003.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Rodríguez N, Cuenca A, Ramírez de Arellano C, Medio-Simón M, Asensio G. Unprecedented palladium-catalyzed cross-coupling reaction of alpha-bromo sulfoxides with boronic acids. Org Lett 2003; 5:1705-8. [PMID: 12735757 DOI: 10.1021/ol034358m] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] A new Suzuki-type palladium-catalyzed reaction of boronic acids with alpha-bromo sulfoxides has been developed using a protocol similar to the well-documented reaction of boronic acids with aryl halides. Both cross-coupling and homocoupling processes were observed. The best yields in cross-coupling products were obtained when the presence of oxygen was carefully excluded using degassed solvents. The oxidative addition palladium complex intermediate could be isolated and characterized by X-ray single-crystal diffraction.
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Affiliation(s)
- Nuria Rodríguez
- Departamento de Química Orgánica, Universidad de Valencia, Avda Vicent Andres Estelles s/n 46100 Burjassot-Spain
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Cuenca A, Medio-Simón M, Aguilar G, Weibel D, Beck A, Seebach D. Highly Enantioselective Protonation of the 3,4-Dihydro-2- methylnaphthalen-1(2H)-one Li-Enolate by TADDOLs. Helv Chim Acta 2000. [DOI: 10.1002/1522-2675(20001220)83:12<3153::aid-hlca3153>3.0.co;2-r] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Asensio G, Gaviña P, Cuenca A, Ramı́rez de Arellano M, Domingo LR, Medio-Simón M. First synthesis of the chiral mixed O/S ligands, 1,2-sulfinyl thiols: application as chiral proton sources in enantioselective protonations of enolates. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s0957-4166(00)00330-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Asensio G, Cuenca A, Gaviña P, Medio-Simón M. Enantioselective protonation/diastereoselective reduction with sodium naphthalenide-acetamide; a new synthesis of chiral trans-2-phenylcyclohexanol. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)00615-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Asensio G, Alemán P, Cuenca A, Gil J, Medio-Simón M. Efficient asymmetric protonation of enolates with readily accessible chiral α-sulfinyl alcohols. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s0957-4166(98)00426-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Asensio G, Aleman PA, Domingo LR, Medio-Simón M. Remarkable effect of lithium bromide in the enantioselective protonation with α-sulfinyl alcohols. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)00469-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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