1
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Lorea B, García-Urricelqui A, Odriozola JM, Razkin J, Espinal-Viguri M, Oiarbide M, Mielgo A, García JM, Palomo C. Organocatalytic Michael Addition of Unactivated α-Branched Nitroalkanes to Afford Optically Active Tertiary Nitrocompounds. Org Lett 2023. [PMID: 38009850 DOI: 10.1021/acs.orglett.3c03340] [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: 11/29/2023]
Abstract
The direct, asymmetric conjugate addition of unactivated α-branched nitroalkanes is developed based on the combined use of chiral amine/ureidoaminal bifunctional catalysts and a tunable acrylate template to provide tertiary nitrocompounds in 55-80% isolated yields and high enantioselectivity (e.r. up to 96:4). Elaboration of the ketol moiety in thus obtained adducts allows a fast entry to not only carboxylic and aldehyde derivatives but also nitrile compounds and enantioenriched 5,5-disubstituted γ-lactams.
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Affiliation(s)
- Beñat Lorea
- Departamento de Ciencias, Institute for Advanced Materials and Mathematics (InaMat2), Universidad Pública de Navarra (UPNA), 31006 Pamplona, Spain
| | - Ane García-Urricelqui
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizábal 3, 20018 San Sebastián, Spain
| | - José M Odriozola
- Departamento de Ciencias, Institute for Advanced Materials and Mathematics (InaMat2), Universidad Pública de Navarra (UPNA), 31006 Pamplona, Spain
| | - Jesús Razkin
- Departamento de Ciencias, Institute for Advanced Materials and Mathematics (InaMat2), Universidad Pública de Navarra (UPNA), 31006 Pamplona, Spain
| | - Maialen Espinal-Viguri
- Departamento de Ciencias, Institute for Advanced Materials and Mathematics (InaMat2), Universidad Pública de Navarra (UPNA), 31006 Pamplona, Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizábal 3, 20018 San Sebastián, Spain
| | - Antonia Mielgo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizábal 3, 20018 San Sebastián, Spain
| | - Jesús M García
- Departamento de Ciencias, Institute for Advanced Materials and Mathematics (InaMat2), Universidad Pública de Navarra (UPNA), 31006 Pamplona, Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizábal 3, 20018 San Sebastián, Spain
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2
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Oiarbide M, Palomo C. Brønsted Base-Catalyzed Enantioselective α-Functionalization of Carbonyl Compounds Involving π-Extended Enolates. CHEM REC 2023; 23:e202300164. [PMID: 37350363 DOI: 10.1002/tcr.202300164] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/06/2023] [Indexed: 06/24/2023]
Abstract
Chiral Brønsted base (BB) catalyzed asymmetric transformations constitute an important tool for synthesis. A meaningful fraction of these transformations proceeds through transiently generated enolate intermediates, which display quite versatile reactivity against a variety of electrophiles. Some years ago, our group became interested in developing BB-catalyzed asymmetric reactions of enolizable carbonyl substrates that involve π-extended enolates in which, besides control of reaction diastereo and enantioselectivity, the site-selectivity control is an additional issue in most cases. In the examples covered in this account the opportunities deployed, and the challenges posed, by these methods are illustrated, with a focus on the generation of quaternary carbon stereocenters. In the way, new bifunctional BB catalysts as well as achiral templates were developed that may find further applications.
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Affiliation(s)
- Mikel Oiarbide
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018 San Sebastián, Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018 San Sebastián, Spain
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3
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Odriozola JM, Razkin J, Lorea B, Mielgo A, García JM, Oiarbide M, Palomo C. Development of an α'-hydroxy enone for the aminocatalytic asymmetric formal conjugate addition of aldehydes to acrylates, vinyl ketones and acrolein. Org Biomol Chem 2023. [PMID: 37249037 DOI: 10.1039/d3ob00475a] [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: 05/31/2023]
Abstract
Aminocatalytic asymmetric conjugate addition of aldehydes to Michael acceptors is a well established C-C bond forming methodology. However, various acrylic-type acceptors, including acrylic acid derivatives and acrolein, remain reluctant. Here we demonstrate that the internal H-bonding self-activation in α'-hydroxy enones allows them to react smoothly with enolizable aldehydes using commercially available aminocatalysts to afford adducts in good yields and high enantioselectivity. Straightforward conversion of the ketol moiety of these adducts into aldehyde, ketone and carboxylic acid functionalities offers an indirect, unified entry to products derived from acrolein, alkyl-vinyl ketones and acrylates, respectively.
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Affiliation(s)
- José M Odriozola
- Departamento de Ciencias. Institute for Advanced Materials and Mathematics (InaMat2). Universidad Pública de Navarra (UPNA), 31006-Pamplona, Spain.
| | - Jesús Razkin
- Departamento de Ciencias. Institute for Advanced Materials and Mathematics (InaMat2). Universidad Pública de Navarra (UPNA), 31006-Pamplona, Spain.
| | - Beñat Lorea
- Departamento de Ciencias. Institute for Advanced Materials and Mathematics (InaMat2). Universidad Pública de Navarra (UPNA), 31006-Pamplona, Spain.
| | - Antonia Mielgo
- Departamento de Química Orgánica I. Universidad del País Vasco UPV/EHU. Manuel Lardizabal 3, 20018-San Sebastián, Spain.
| | - Jesús M García
- Departamento de Ciencias. Institute for Advanced Materials and Mathematics (InaMat2). Universidad Pública de Navarra (UPNA), 31006-Pamplona, Spain.
| | - Mikel Oiarbide
- Departamento de Química Orgánica I. Universidad del País Vasco UPV/EHU. Manuel Lardizabal 3, 20018-San Sebastián, Spain.
| | - Claudio Palomo
- Departamento de Química Orgánica I. Universidad del País Vasco UPV/EHU. Manuel Lardizabal 3, 20018-San Sebastián, Spain.
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4
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Vera S, Landa A, Mielgo A, Ganboa I, Oiarbide M, Soloshonok V. Catalytic Asymmetric α-Functionalization of α-Branched Aldehydes. Molecules 2023; 28:molecules28062694. [PMID: 36985666 PMCID: PMC10056299 DOI: 10.3390/molecules28062694] [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] [Received: 03/09/2023] [Revised: 03/14/2023] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
Aldehydes constitute a main class of organic compounds widely applied in synthesis. As such, catalyst-controlled enantioselective α-functionalization of aldehydes has attracted great interest over the years. In this context, α-branched aldehydes are especially challenging substrates because of reactivity and selectivity issues. Firstly, the transient trisubstituted enamines and enolates resulting upon treatment with an aminocatalyst or a base, respectively, would exhibit attenuated reactivity; secondly, mixtures of E- and Z-configured enamines/enolates may be formed; and third, effective face-discrimination on such trisubstituted sp2 carbon intermediates by the incoming electrophilic reagent is not trivial. Despite these issues, in the last 15 years, several catalytic approaches for the α-functionalization of prostereogenic α-branched aldehydes that proceed in useful yields and diastereo- and enantioselectivity have been uncovered. Developments include both organocatalytic and metal-catalyzed approaches as well as dual catalysis strategies for forging new carbon–carbon and carbon–heteroatom (C-O, N, S, F, Cl, Br, …) bond formation at Cα of the starting aldehyde. In this review, some key early contributions to the field are presented, but focus is on the most recent methods, mainly covering the literature from year 2014 onward.
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Affiliation(s)
- Silvia Vera
- Department of Organic Chemistry I, University of the Basque Country UPV/EHU, Manuel Lardizabal 3, 20018 Donostia-San Sebastián, Spain
| | - Aitor Landa
- Department of Organic Chemistry I, University of the Basque Country UPV/EHU, Manuel Lardizabal 3, 20018 Donostia-San Sebastián, Spain
| | - Antonia Mielgo
- Department of Organic Chemistry I, University of the Basque Country UPV/EHU, Manuel Lardizabal 3, 20018 Donostia-San Sebastián, Spain
- Correspondence: (A.M.); (M.O.)
| | - Iñaki Ganboa
- Department of Organic Chemistry I, University of the Basque Country UPV/EHU, Manuel Lardizabal 3, 20018 Donostia-San Sebastián, Spain
| | - Mikel Oiarbide
- Department of Organic Chemistry I, University of the Basque Country UPV/EHU, Manuel Lardizabal 3, 20018 Donostia-San Sebastián, Spain
- Correspondence: (A.M.); (M.O.)
| | - Vadim Soloshonok
- Department of Organic Chemistry I, University of the Basque Country UPV/EHU, Manuel Lardizabal 3, 20018 Donostia-San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain
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5
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Sánchez-Sánchez L, García J, Fernández R, Noskova E, Egiguren-Ortiz J, Gulak M, Ochoa E, Laso A, Oiarbide M, Santos JI, Fe Andrés M, González-Coloma A, Adell A, Astigarraga E, Barreda-Gómez G. Characterization of the Antitumor Potential of Extracts of Cannabis sativa Strains with High CBD Content in Human Neuroblastoma. Int J Mol Sci 2023; 24:ijms24043837. [PMID: 36835247 PMCID: PMC9964014 DOI: 10.3390/ijms24043837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/10/2023] [Accepted: 02/13/2023] [Indexed: 02/17/2023] Open
Abstract
Cannabis has been used for decades as a palliative therapy in the treatment of cancer. This is because of its beneficial effects on the pain and nausea that patients can experience as a result of chemo/radiotherapy. Tetrahydrocannabinol and cannabidiol are the main compounds present in Cannabis sativa, and both exert their actions through a receptor-mediated mechanism and through a non-receptor-mediated mechanism, which modulates the formation of reactive oxygen species. These oxidative stress conditions might trigger lipidic changes, which would compromise cell membrane stability and viability. In this sense, numerous pieces of evidence describe a potential antitumor effect of cannabinoid compounds in different types of cancer, although controversial results limit their implementation. In order to further investigate the possible mechanism involved in the antitumoral effects of cannabinoids, three extracts isolated from Cannabis sativa strains with high cannabidiol content were analyzed. Cell mortality, cytochrome c oxidase activity and the lipid composition of SH-SY5Y cells were determined in the absence and presence of specific cannabinoid ligands, with and without antioxidant pre-treatment. The cell mortality induced by the extracts in this study appeared to be related to the inhibition of the cytochrome c oxidase activity and to the THC concentration. This effect on cell viability was similar to that observed with the cannabinoid agonist WIN55,212-2. The effect was partially blocked by the selective CB1 antagonist AM281, and the antioxidant α-tocopherol. Moreover, certain membrane lipids were affected by the extracts, which demonstrated the importance of oxidative stress in the potential antitumoral effects of cannabinoids.
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Affiliation(s)
- Laura Sánchez-Sánchez
- Research and Development Department, IMG Pharma Biotech S.L., 48160 Derio, Spain
- Instituto de Biología y Genética Molecular (IBGM), Unidad de Excelencia, Universidad de Valladolid-CSIC, 47011 Valladolid, Spain
| | - Javier García
- Institute of Agricultural Sciences (ICA), Spanish Research Council (CSIC), 28006 Madrid, Spain
| | - Roberto Fernández
- Research and Development Department, IMG Pharma Biotech S.L., 48160 Derio, Spain
| | - Ekaterina Noskova
- Research and Development Department, IMG Pharma Biotech S.L., 48160 Derio, Spain
- Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC), Consejo Superior de Investigaciones Científicas (CSIC), University of Cantabria, 39011 Santander, Spain
| | - June Egiguren-Ortiz
- Research and Development Department, IMG Pharma Biotech S.L., 48160 Derio, Spain
- Pharmacology Department, Faculty of Medicine and Nursing, University of the Basque Country UPV/EHU, 48940 Leioa, Spain
| | | | - Eneko Ochoa
- Pharmacology Department, Faculty of Medicine and Nursing, University of the Basque Country UPV/EHU, 48940 Leioa, Spain
- Research and Development Division, AleoVitro, 48160 Derio, Spain
| | - Antonio Laso
- Research and Development Division, AleoVitro, 48160 Derio, Spain
| | - Mikel Oiarbide
- Pharmacology Department, Faculty of Medicine and Nursing, University of the Basque Country UPV/EHU, 48940 Leioa, Spain
| | - José Ignacio Santos
- Pharmacology Department, Faculty of Medicine and Nursing, University of the Basque Country UPV/EHU, 48940 Leioa, Spain
| | - María Fe Andrés
- Institute of Agricultural Sciences (ICA), Spanish Research Council (CSIC), 28006 Madrid, Spain
| | - Azucena González-Coloma
- Institute of Agricultural Sciences (ICA), Spanish Research Council (CSIC), 28006 Madrid, Spain
| | - Albert Adell
- Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC), Consejo Superior de Investigaciones Científicas (CSIC), University of Cantabria, 39011 Santander, Spain
| | - Egoitz Astigarraga
- Research and Development Department, IMG Pharma Biotech S.L., 48160 Derio, Spain
| | - Gabriel Barreda-Gómez
- Research and Development Department, IMG Pharma Biotech S.L., 48160 Derio, Spain
- Correspondence: ; Tel.: +34-94-4316-577; Fax: +34-94-6013-455
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6
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Villaescusa L, Hernández I, Azcune L, Rudi A, Mercero JM, Landa A, Oiarbide M, Palomo C. Rigidified Bis(sulfonyl)ethylenes as Effective Michael Acceptors for Asymmetric Catalysis: Application to the Enantioselective Synthesis of Quaternary Hydantoins. J Org Chem 2023; 88:972-987. [PMID: 36630318 PMCID: PMC10013931 DOI: 10.1021/acs.joc.2c02403] [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: 01/12/2023]
Abstract
The catalytic, enantio- and diastereoselective addition of hydantoin surrogates II to "rigidified" vinylidene bis(sulfone) reagents is developed, thus overcoming the inability of commonly employed β-substituted vinylic sulfones to react. Adducts are transformed in enantioenriched 5,5-disubstituted hydantoins through hydrolysis and reductive desulfonylation processes providing new structures for eventual bioassays. Density functional theory studies that rationalize the observed reactivity and stereoselectivity trends are also provided.
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Affiliation(s)
- Leire Villaescusa
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel Lardizabal 3, Donostia-San Sebastián 20018, Spain
| | - Iker Hernández
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel Lardizabal 3, Donostia-San Sebastián 20018, Spain
| | - Laura Azcune
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel Lardizabal 3, Donostia-San Sebastián 20018, Spain
| | - Ainhoa Rudi
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel Lardizabal 3, Donostia-San Sebastián 20018, Spain
| | - José M Mercero
- Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU) & Donostia International Physics Center (DIPC), Donostia 20018, Spain
| | - Aitor Landa
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel Lardizabal 3, Donostia-San Sebastián 20018, Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel Lardizabal 3, Donostia-San Sebastián 20018, Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel Lardizabal 3, Donostia-San Sebastián 20018, Spain
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7
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Vera S, García-Urricelqui A, Mielgo A, Oiarbide M. Progress in (Thio)urea‐ and Squaramide‐Based Brønsted Base Catalysts with Multiple H‐Bond Donors. European J Org Chem 2022. [DOI: 10.1002/ejoc.202201254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Silvia Vera
- University of the Basque Country: Universidad del Pais Vasco Química Orgánica I SPAIN
| | - Ane García-Urricelqui
- University of the Basque Country: Universidad del Pais Vasco Química Orgánica I SPAIN
| | - Antonia Mielgo
- University of the Basque Country: Universidad del Pais Vasco Organic Chemistry I Manuel de Ladizábal 3 20018 San Sebastián SPAIN
| | - Mikel Oiarbide
- University of the Basque Country: Universidad del Pais Vasco Química Orgánica I SPAIN
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8
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Abstract
Catalyst-controlled functionalization of unmodified carbonyl compounds is a relevant operation in organic synthesis, especially when high levels of site- and stereoselectivity can be attained. This objective is now within reach for some subsets of enolizable substrates using various types of activation mechanisms. Recent contributions to this area include enantioselective transformations that proceed via transiently generated noncovalent di(tri)enolate-catalyst coordination species. While relatively easier to form than simple enolate congeners, di(tri)enolates are ambifunctional in nature and so control of the reaction regioselectivity becomes an issue. This Minireview discusses in some detail this and other problems, and how noncovalent activation approaches based on metallic and metal free catalysts have been developed to advance the field.
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Affiliation(s)
- Mikel Oiarbide
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHUManuel Lardizabal 320018San SebastiánSpain
| | - Claudio Palomo
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHUManuel Lardizabal 320018San SebastiánSpain
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9
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Oiarbide M, Palomo C. Frontispiece: Extended Enolates: Versatile Intermediates for Asymmetric C‐H Functionalization via Noncovalent Catalysis. Chemistry 2021. [DOI: 10.1002/chem.202184062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mikel Oiarbide
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
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10
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Izquierdo J, Demurget N, Landa A, Brinck T, Mercero JM, Dinér P, Oiarbide M, Palomo C. Asymmetric Synthesis of Adjacent Tri- and Tetrasubstituted Carbon Stereocenters: Organocatalytic Aldol Reaction of an Hydantoin Surrogate with Azaarene 2-Carbaldehydes. Chemistry 2019; 25:12431-12438. [PMID: 31318987 DOI: 10.1002/chem.201902817] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 07/15/2019] [Indexed: 12/13/2022]
Abstract
A bifunctional amine/squaramide catalyst promoted direct aldol addition of an hydantoin surrogate to pyridine 2-carbaldehyde N-oxides to afford adducts bearing two vicinal tertiary/quaternary carbons in high diastereo- and enantioselectivity (d.r. up to >20:1; ee up to 98 %) is reported. Acid hydrolysis of adducts followed by reduction of the N-oxide group yields enantiopure carbinol-tethered quaternary hydantoin-azaarene conjugates with densely functionalized skeletons. DFT studies of the potential energy surface (B3LYP/6-31+G(d)+CPCM (dichloromethane)) of the reaction correlate the activity of different catalysts and support an intramolecular hydrogen-bond-assisted activation of the squaramide moiety in the transition state of the catalytic reaction.
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Affiliation(s)
- June Izquierdo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
| | - Noémie Demurget
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
| | - Aitor Landa
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
| | - Tore Brinck
- Department of Chemistry, KTH Royal Institute of, Technology, Teknikringen 30, 100 44, Stockholm, Sweden
| | - Jose M Mercero
- Kimika Fakultatea, Euskal Herriko Unibertsitatea, (UPV/EHU) & Donostia International Physics Center (DIPC), Donostia, Spain
| | - Peter Dinér
- Department of Chemistry, KTH Royal Institute of, Technology, Teknikringen 30, 100 44, Stockholm, Sweden
| | - Mikel Oiarbide
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
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11
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Olaizola O, Iriarte I, Zanella G, Gómez‐Bengoa E, Ganboa I, Oiarbide M, Palomo C. Brønsted Base Catalyzed One‐Pot Synthesis of Stereodefined Six‐Member Carbocycles Featuring Transient Trienolates and a Key Intramolecular 1,6‐Addition. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908693] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Olatz Olaizola
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Igor Iriarte
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Giovanna Zanella
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Enrique Gómez‐Bengoa
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Iñaki Ganboa
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
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12
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Olaizola O, Iriarte I, Zanella G, Gómez‐Bengoa E, Ganboa I, Oiarbide M, Palomo C. Brønsted Base Catalyzed One‐Pot Synthesis of Stereodefined Six‐Member Carbocycles Featuring Transient Trienolates and a Key Intramolecular 1,6‐Addition. Angew Chem Int Ed Engl 2019; 58:14250-14254. [DOI: 10.1002/anie.201908693] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Olatz Olaizola
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Igor Iriarte
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Giovanna Zanella
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Enrique Gómez‐Bengoa
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Iñaki Ganboa
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
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13
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Urruzuno I, Mugica O, Zanella G, Vera S, Gómez‐Bengoa E, Oiarbide M, Palomo C. α‐Branched Ketone Dienolates: Base‐Catalysed Generation and Regio‐ and Enantioselective Addition Reactions. Chemistry 2019; 25:9701-9709. [DOI: 10.1002/chem.201901694] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Iñaki Urruzuno
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Odei Mugica
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Giovanna Zanella
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Silvia Vera
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Enrique Gómez‐Bengoa
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
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14
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Campano TE, Iriarte I, Olaizola O, Etxabe J, Mielgo A, Ganboa I, Odriozola JM, García JM, Oiarbide M, Palomo C. Enantioselective Addition of Alkynyl Ketones to Nitroolefins Assisted by Brønsted Base/H‐Bonding Catalysis. Chemistry 2019; 25:4390-4397. [DOI: 10.1002/chem.201805542] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Teresa E. Campano
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Igor Iriarte
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Olatz Olaizola
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Julen Etxabe
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Antonia Mielgo
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Iñaki Ganboa
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - José M. Odriozola
- Departamento de Química AplicadaInstitute for Advanced Materials (INAMAT)Universidad Pública de Navarra 31006 Pamplona Spain
| | - Jesús M. García
- Departamento de Química AplicadaInstitute for Advanced Materials (INAMAT)Universidad Pública de Navarra 31006 Pamplona Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
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15
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Izquierdo J, Etxabe J, Duñabeitia E, Landa A, Oiarbide M, Palomo C. Enantioselective Synthesis of 5,5-Disubstituted Hydantoins by Brønsted Base/H-Bond Catalyst Assisted Michael Reactions of a Design Template. Chemistry 2018; 24:7217-7227. [PMID: 29575281 DOI: 10.1002/chem.201800506] [Citation(s) in RCA: 9] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Indexed: 01/25/2023]
Abstract
A new method for the enantioselective synthesis of 5,5-disubstituted (quaternary) hydantoins was developed on the basis of an organocatalytic Michael reaction approach involving the use of 2-benzylthio-3,5-dihydroimidazol-4-ones as key hydantoin surrogates. The method is general with respect to the substitution pattern at the hydantoin N1 (alkyl, aryl, acyl), N3 (aryl), and C5 (linear/branched alkyl, aryl) positions and affords essentially single diastereomeric products with enantioselectivities higher than 95 % ee in most cases. Among the bifunctional Brønsted base/H-bond catalysts examined, a known squaramide-tertiary amine catalyst and a newly prepared squaramide-tertiary amine catalyst provide the highest selectivity so far with either nitroolefins or vinyl ketones as the acceptor components. Kinetic measurements support a first-order rate dependence on both reaction partners, the donor template and the Michael acceptor, whereas competitive 1 H NMR spectroscopy experiments reveal the high ability of the template for catalyst binding.
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Affiliation(s)
- Joseba Izquierdo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
| | - Julen Etxabe
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
| | - Eider Duñabeitia
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
| | - Aitor Landa
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018, San Sebastián, Spain
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16
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Olaizola I, Campano TE, Iriarte I, Vera S, Mielgo A, García JM, Odriozola JM, Oiarbide M, Palomo C. α-Hydroxy Ketones as Masked Ester Donors in Brønsted Base Catalyzed Conjugate Additions to Nitroalkenes. Chemistry 2018; 24:3893-3901. [DOI: 10.1002/chem.201705968] [Citation(s) in RCA: 10] [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] [Received: 12/16/2017] [Indexed: 01/14/2023]
Affiliation(s)
- Iurre Olaizola
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Teresa E. Campano
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Igor Iriarte
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Silvia Vera
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Antonia Mielgo
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Jesús M. García
- Departamento de Química Aplicada; Institute for Advanced Materials (INAMAT); Universidad Pública de Navarra; 31006 Pamplona Spain
| | - José M. Odriozola
- Departamento de Química Aplicada; Institute for Advanced Materials (INAMAT); Universidad Pública de Navarra; 31006 Pamplona Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
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17
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Abstract
The catalytic asymmetric α-functionalization of prochiral barbituric acids, a subtype of pseudosymmetric 1,3-diamides, to yield the corresponding 5,5-disubstituted (quaternary) derivatives remains essentially unsolved. In this study 2-alkylthio-4,6-dioxopirimidines are designed as key 1,3-diamide surrogates that perform exceedingly in amine-squaramide catalyzed C-C bond forming reactions with vinyl ketones or Morita-Baylis-Hillmann-type allyl bromides as electrophiles. Mild acid hydrolysis of adducts affords barbituric acid derivatives with an in-ring quaternary carbon in unprecedented enantioselectivity, offering valuable materials for biological evaluations.
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Affiliation(s)
- Sandra Del Pozo
- Departamento de Química Orgánica I, Universidad del País Vasco , Manuel de Lardizabal 3, 2018 San Sebastián, Spain
| | - Silvia Vera
- Departamento de Química Orgánica I, Universidad del País Vasco , Manuel de Lardizabal 3, 2018 San Sebastián, Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I, Universidad del País Vasco , Manuel de Lardizabal 3, 2018 San Sebastián, Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I, Universidad del País Vasco , Manuel de Lardizabal 3, 2018 San Sebastián, Spain
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18
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Bécart D, Diemer V, Salaün A, Oiarbide M, Nelli YR, Kauffmann B, Fischer L, Palomo C, Guichard G. Helical Oligourea Foldamers as Powerful Hydrogen Bonding Catalysts for Enantioselective C–C Bond-Forming Reactions. J Am Chem Soc 2017; 139:12524-12532. [DOI: 10.1021/jacs.7b05802] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Diane Bécart
- Univ.
Bordeaux, CNRS, CBMN, UMR 5248, Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, F-33607 Pessac, France
- Departamento
de Química Orgánica I, Facultad de Químicas, Universidad del País Vasco UPV/EHU, Apdo. 1072, 20080 San Sebastián, Spain
| | - Vincent Diemer
- Univ.
Bordeaux, CNRS, CBMN, UMR 5248, Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, F-33607 Pessac, France
| | - Arnaud Salaün
- Univ.
Bordeaux, CNRS, CBMN, UMR 5248, Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, F-33607 Pessac, France
| | - Mikel Oiarbide
- Departamento
de Química Orgánica I, Facultad de Químicas, Universidad del País Vasco UPV/EHU, Apdo. 1072, 20080 San Sebastián, Spain
| | - Yella Reddy Nelli
- Univ.
Bordeaux, CNRS, CBMN, UMR 5248, Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, F-33607 Pessac, France
| | - Brice Kauffmann
- Univ.
Bordeaux, CNRS, INSERM, UMS3033/US001, Institut Européen de Chimie et Biologie, F-33607 Pessac, France
| | - Lucile Fischer
- Univ.
Bordeaux, CNRS, CBMN, UMR 5248, Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, F-33607 Pessac, France
| | - Claudio Palomo
- Departamento
de Química Orgánica I, Facultad de Químicas, Universidad del País Vasco UPV/EHU, Apdo. 1072, 20080 San Sebastián, Spain
| | - Gilles Guichard
- Univ.
Bordeaux, CNRS, CBMN, UMR 5248, Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, F-33607 Pessac, France
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19
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Odriozola A, Oiarbide M, Palomo C. Enantioselective Synthesis of Quaternary Δ4
- and Δ5
-Dehydroprolines Based on a Two-Step Formal [3+2] Cycloaddition of α-Aryl and α-Alkyl Isocyano(thio)acetates with Vinyl Ketones. Chemistry 2017; 23:12758-12762. [DOI: 10.1002/chem.201703526] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Indexed: 01/14/2023]
Affiliation(s)
- Amaiur Odriozola
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
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20
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Iriarte I, Olaizola O, Vera S, Gamboa I, Oiarbide M, Palomo C. Controlling the α/γ-Reactivity of Vinylogous Ketone Enolates in Organocatalytic Enantioselective Michael Reactions. Angew Chem Int Ed Engl 2017; 56:8860-8864. [DOI: 10.1002/anie.201703764] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 05/13/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Igor Iriarte
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Olatz Olaizola
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Silvia Vera
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Iñaki Gamboa
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
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21
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Iriarte I, Olaizola O, Vera S, Gamboa I, Oiarbide M, Palomo C. Controlling the α/γ-Reactivity of Vinylogous Ketone Enolates in Organocatalytic Enantioselective Michael Reactions. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703764] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Igor Iriarte
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Olatz Olaizola
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Silvia Vera
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Iñaki Gamboa
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
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22
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Urruzuno I, Mugica O, Oiarbide M, Palomo C. Bifunctional Brønsted Base Catalyst Enables Regio-, Diastereo-, and Enantioselective Cα-Alkylation of β-Tetralones and Related Aromatic-Ring-Fused Cycloalkanones. Angew Chem Int Ed Engl 2017; 56:2059-2063. [DOI: 10.1002/anie.201612332] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Indexed: 12/12/2022]
Affiliation(s)
- Iñaki Urruzuno
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Odei Mugica
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
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23
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Urruzuno I, Mugica O, Oiarbide M, Palomo C. Bifunctional Brønsted Base Catalyst Enables Regio-, Diastereo-, and Enantioselective Cα-Alkylation of β-Tetralones and Related Aromatic-Ring-Fused Cycloalkanones. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612332] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Iñaki Urruzuno
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Odei Mugica
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
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24
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Iriarte I, Vera S, Badiola E, Mielgo A, Oiarbide M, García JM, Odriozola JM, Palomo C. Asymmetric Assembly of All-Carbon Tertiary/Quaternary Nonadjacent Stereocenters through Organocatalytic Conjugate Addition of α-Cyanoacetates to a Methacrylate Equivalent. Chemistry 2016; 22:13690-6. [DOI: 10.1002/chem.201603082] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Indexed: 01/08/2023]
Affiliation(s)
- Igor Iriarte
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Silvia Vera
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Eider Badiola
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Antonia Mielgo
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Jesús M. García
- Departamento de Química Aplicada; Universidad Pública de Navarra; 31006 Pamplona Spain
| | - José M. Odriozola
- Departamento de Química Aplicada; Universidad Pública de Navarra; 31006 Pamplona Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
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25
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Lapuerta I, Vera S, Oiarbide M, Palomo C. Development of a syn-Selective Mannich Reaction of Aldehydes with Propargylic Imines by Dual Catalysis: Asymmetric Synthesis of Functionalized Propargylic Amines. Chemistry 2016; 22:7229-37. [DOI: 10.1002/chem.201600635] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Irati Lapuerta
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Silvia Vera
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
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26
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Izquierdo J, Landa A, Bastida I, López R, Oiarbide M, Palomo C. Base-Catalyzed Asymmetric α-Functionalization of 2-(Cyanomethyl)azaarene N-Oxides Leading to Quaternary Stereocenters. J Am Chem Soc 2016; 138:3282-5. [DOI: 10.1021/jacs.5b13385] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Joseba Izquierdo
- Departamento
de Química
Orgánica I, Universidad del País Vasco, Manuel Lardizábal
3, 20018-San Sebastián, Spain
| | - Aitor Landa
- Departamento
de Química
Orgánica I, Universidad del País Vasco, Manuel Lardizábal
3, 20018-San Sebastián, Spain
| | - Iñaki Bastida
- Departamento
de Química
Orgánica I, Universidad del País Vasco, Manuel Lardizábal
3, 20018-San Sebastián, Spain
| | - Rosa López
- Departamento
de Química
Orgánica I, Universidad del País Vasco, Manuel Lardizábal
3, 20018-San Sebastián, Spain
| | - Mikel Oiarbide
- Departamento
de Química
Orgánica I, Universidad del País Vasco, Manuel Lardizábal
3, 20018-San Sebastián, Spain
| | - Claudio Palomo
- Departamento
de Química
Orgánica I, Universidad del País Vasco, Manuel Lardizábal
3, 20018-San Sebastián, Spain
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27
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Etxabe J, Izquierdo J, Landa A, Oiarbide M, Palomo C. Catalytic Enantioselective Synthesis of N,Cα,Cα-Trisubstituted α-Amino Acid Derivatives Using 1H-Imidazol-4(5H)-ones as Key Templates. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501275] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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28
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Etxabe J, Izquierdo J, Landa A, Oiarbide M, Palomo C. Catalytic Enantioselective Synthesis of N,C(α),C(α)-Trisubstituted α-Amino Acid Derivatives Using 1H-Imidazol-4(5H)-ones as Key Templates. Angew Chem Int Ed Engl 2015; 54:6883-6. [PMID: 25907987 DOI: 10.1002/anie.201501275] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 03/24/2015] [Indexed: 11/06/2022]
Abstract
1H-Imidazol-4(5H)-ones are introduced as novel nucleophilic α-amino acid equivalents in asymmetric synthesis. These compounds not only allow highly efficient construction of tetrasubstituted stereogenic centers, but unlike hitherto known templates, provide direct access to N-substituted (alkyl, allyl, aryl) α-amino acid derivatives.
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Affiliation(s)
- Julen Etxabe
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018 San Sebastián (Spain)
| | - Joseba Izquierdo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018 San Sebastián (Spain)
| | - Aitor Landa
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018 San Sebastián (Spain)
| | - Mikel Oiarbide
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018 San Sebastián (Spain)
| | - Claudio Palomo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizabal 3, 20018 San Sebastián (Spain).
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Badiola E, Fiser B, Gómez-Bengoa E, Mielgo A, Olaizola I, Urruzuno I, García JM, Odriozola JM, Razkin J, Oiarbide M, Palomo C. Enantioselective Construction of Tetrasubstituted Stereogenic Carbons through Brønsted Base Catalyzed Michael Reactions: α′-Hydroxy Enones as Key Enoate Equivalent. J Am Chem Soc 2014; 136:17869-81. [DOI: 10.1021/ja510603w] [Citation(s) in RCA: 106] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Eider Badiola
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| | - Béla Fiser
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| | - Enrique Gómez-Bengoa
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| | - Antonia Mielgo
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| | - Iurre Olaizola
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| | - Iñaki Urruzuno
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| | - Jesús M. García
- Departamento
de Química Aplicada, Institute of Advanced Materials (INAMAT), Universidad Pública de Navarra, 31006-Pamplona, Spain
| | - José M. Odriozola
- Departamento
de Química Aplicada, Institute of Advanced Materials (INAMAT), Universidad Pública de Navarra, 31006-Pamplona, Spain
| | - Jesús Razkin
- Departamento
de Química Aplicada, Institute of Advanced Materials (INAMAT), Universidad Pública de Navarra, 31006-Pamplona, Spain
| | - Mikel Oiarbide
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
| | - Claudio Palomo
- Departamento
de Química Orgánica I, Universidad del País Vasco, Manuel Lardizábal 3, 20018-San Sebastián, Spain
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García JM, Odriozola JM, Razkin J, Lapuerta I, Odriozola A, Urruzuno I, Vera S, Oiarbide M, Palomo C. Catalytic Enantioselective Quick Route to Aldol-Tethered 1,6- and 1,7-Enynes from ω-Unsaturated Aldehydes. Chemistry 2014; 20:15543-54. [DOI: 10.1002/chem.201404452] [Citation(s) in RCA: 7] [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] [Received: 07/17/2014] [Indexed: 11/07/2022]
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Gómez-Bengoa E, García JM, Jiménez S, Lapuerta I, Mielgo A, Odriozola JM, Otazo I, Razkin J, Urruzuno I, Vera S, Oiarbide M, Palomo C. Asymmetric synthesis of propargylic alcohols via aldol reaction of aldehydes with ynals promoted by prolinol ether–transition metal–Brønsted acid cooperative catalysis. Chem Sci 2013. [DOI: 10.1039/c3sc51027a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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32
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Cano I, Gómez-Bengoa E, Landa A, Maestro M, Mielgo A, Olaizola I, Oiarbide M, Palomo C. N-(Diazoacetyl)oxazolidin-2-thiones as Sulfur-Donor Reagents: Asymmetric Synthesis of Thiiranes from Aldehydes. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201204771] [Citation(s) in RCA: 9] [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: 11/07/2022]
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Cano I, Gómez-Bengoa E, Landa A, Maestro M, Mielgo A, Olaizola I, Oiarbide M, Palomo C. N-(Diazoacetyl)oxazolidin-2-thiones as Sulfur-Donor Reagents: Asymmetric Synthesis of Thiiranes from Aldehydes. Angew Chem Int Ed Engl 2012; 51:10856-60. [DOI: 10.1002/anie.201204771] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Indexed: 11/12/2022]
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Abstract
Approaching the Nature's efficiency in controlling both reactivity and stereoselectivity of organic reactions by means of a catalyst species remains a formidable challenge for chemists to face. Despite impressive advances in the design of novel catalysts and activation modes, current catalytic and asymmetric methodologies rarely meet desirable standards of robustness, substrate scope, and selectivity altogether. One trick to improve catalyst behaviour is to identify adequate substrate template-catalyst combinations so that optimum performance of the reaction system could be achieved. During the last couple of years α-hydroxy ketones, and most particularly α'-hydroxy enones, have emerged as useful templates with applications in a number of metal-catalyzed as well as organocatalyzed C-C and C-X bond-forming stereoselective reactions. The first review of these accomplishments is presented here along with a brief historical introduction.
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Affiliation(s)
- Claudio Palomo
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco UPV/EHU, Apdo. 1072, 20080 San Sebastián, Spain.
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Gómez-Bengoa E, Jiménez J, Lapuerta I, Mielgo A, Oiarbide M, Otazo I, Velilla I, Vera S, Palomo C. Combined α,α-dialkylprolinol ether/Brønsted acid promotes Mannich reactions of aldehydes with unactivated imines. An entry to anti-configured propargylic amino alcohols. Chem Sci 2012. [DOI: 10.1039/c2sc20590d] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Jiménez J, Landa A, Lizarraga A, Maestro M, Mielgo A, Oiarbide M, Velilla I, Palomo C. Enantio- and Diastereoselective Organocatalytic α-Alkylation of Aldehydes with 3-Substituted 2-(Bromomethyl)acrylates. J Org Chem 2011; 77:747-53. [DOI: 10.1021/jo202073n] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [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)
- Jacqueline Jiménez
- Departamento de Química Orgánica
I, Facultad
de Química, Universidad del País Vasco, Apdo. 1072, 20080, San Sebastián, Spain
| | - Aitor Landa
- Departamento de Química Orgánica
I, Facultad
de Química, Universidad del País Vasco, Apdo. 1072, 20080, San Sebastián, Spain
| | - Aitziber Lizarraga
- Departamento de Química Orgánica
I, Facultad
de Química, Universidad del País Vasco, Apdo. 1072, 20080, San Sebastián, Spain
| | - Miguel Maestro
- Departamento de Química Orgánica
I, Facultad
de Química, Universidad del País Vasco, Apdo. 1072, 20080, San Sebastián, Spain
| | - Antonia Mielgo
- Departamento de Química Orgánica
I, Facultad
de Química, Universidad del País Vasco, Apdo. 1072, 20080, San Sebastián, Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica
I, Facultad
de Química, Universidad del País Vasco, Apdo. 1072, 20080, San Sebastián, Spain
| | - Irene Velilla
- Departamento de Química Orgánica
I, Facultad
de Química, Universidad del País Vasco, Apdo. 1072, 20080, San Sebastián, Spain
| | - Claudio Palomo
- Departamento de Química Orgánica
I, Facultad
de Química, Universidad del País Vasco, Apdo. 1072, 20080, San Sebastián, Spain
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García JM, Oiarbide M, Palomo C. Towards Direct Mukaiyama-Type Reactions Catalytic in Silicon. Angew Chem Int Ed Engl 2011; 50:8790-2. [DOI: 10.1002/anie.201102423] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Indexed: 11/11/2022]
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Gómez-Bengoa E, Landa A, Lizarraga A, Mielgo A, Oiarbide M, Palomo C. Catalytic asymmetric α-alkylation of aldehydesvia a SN2′-type addition-elimination pathway. Chem Sci 2011. [DOI: 10.1039/c0sc00402b] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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40
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Bañuelos P, García JM, Gómez-Bengoa E, Herrero A, Odriozola JM, Oiarbide M, Palomo C, Razkin J. (1R)-(+)-Camphor and Acetone Derived α′-Hydroxy Enones in Asymmetric Diels−Alder Reaction: Catalytic Activation by Lewis and Brønsted Acids, Substrate Scope, Applications in Syntheses, and Mechanistic Studies. J Org Chem 2010; 75:1458-73. [DOI: 10.1021/jo9023039] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [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)
- Patricia Bañuelos
- Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
| | - Jesús M. García
- Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
| | - Enrique Gómez-Bengoa
- Contribution from Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - Ada Herrero
- Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
| | - José M. Odriozola
- Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
| | - Mikel Oiarbide
- Contribution from Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - Claudio Palomo
- Contribution from Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - Jesús Razkin
- Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
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41
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Palomo C, Oiarbide M. β-Lactam Ring Opening: A Useful Entry to Amino Acids and Relevant Nitrogen-Containing Compounds. Heterocyclic Scaffolds I 2010. [DOI: 10.1007/7081_2009_11] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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42
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Landa A, Puente Á, Santos JI, Vera S, Oiarbide M, Palomo C. Catalytic Conjugate Additions of Geminal Bis(sulfone)s: Expanding the Chemistry of Sulfones as Simple Alkyl Anion Equivalents. Chemistry 2009; 15:11954-62. [DOI: 10.1002/chem.200902094] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [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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43
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García JM, Maestro MA, Oiarbide M, Odriozola JM, Razkin J, Palomo C. Conjugate Addition of Nitroalkanes to an Acrylate Equivalent. Stereocontrol at C-α of the Nitro Group through Double Catalytic Activation. Org Lett 2009; 11:3826-9. [DOI: 10.1021/ol901351k] [Citation(s) in RCA: 25] [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: 11/29/2022]
Affiliation(s)
- Jesús M. García
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain, Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía 31006 Pamplona, Spain, and Departamento de Química Fundamental, Facultad de Ciencias, Universidade da Coruña, Campus Zapateira s/n, 15071 A Coruña, Spain
| | - Miguel A. Maestro
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain, Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía 31006 Pamplona, Spain, and Departamento de Química Fundamental, Facultad de Ciencias, Universidade da Coruña, Campus Zapateira s/n, 15071 A Coruña, Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain, Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía 31006 Pamplona, Spain, and Departamento de Química Fundamental, Facultad de Ciencias, Universidade da Coruña, Campus Zapateira s/n, 15071 A Coruña, Spain
| | - José M. Odriozola
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain, Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía 31006 Pamplona, Spain, and Departamento de Química Fundamental, Facultad de Ciencias, Universidade da Coruña, Campus Zapateira s/n, 15071 A Coruña, Spain
| | - Jesús Razkin
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain, Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía 31006 Pamplona, Spain, and Departamento de Química Fundamental, Facultad de Ciencias, Universidade da Coruña, Campus Zapateira s/n, 15071 A Coruña, Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain, Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía 31006 Pamplona, Spain, and Departamento de Química Fundamental, Facultad de Ciencias, Universidade da Coruña, Campus Zapateira s/n, 15071 A Coruña, Spain
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Landa A, Maestro M, Masdeu C, Puente Á, Vera S, Oiarbide M, Palomo C. Highly Enantioselective Conjugate Additions of Aldehydes to Vinyl Sulfones. Chemistry 2009; 15:1562-5. [DOI: 10.1002/chem.200802441] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [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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García J, González A, Kardak B, Odriozola J, Oiarbide M, Razkin J, Palomo C. Copper-Catalyzed Enantioselective Conjugate Addition of Dialkylzinc Reagents to α′-Oxy Enones. Chemistry 2008; 14:8768-8771. [DOI: 10.1002/chem.200801343] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [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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47
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Palomo C, Oiarbide M, García JM, Bañuelos P, Odriozola JM, Razkin J, Linden A. Catalytic Michael Reactions of Ketoesters with a Camphor-Derived Acrylate Equivalent: Stereoselective Access to All-Carbon Quaternary Centers. Org Lett 2008; 10:2637-40. [DOI: 10.1021/ol800564d] [Citation(s) in RCA: 14] [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: 11/28/2022]
Affiliation(s)
- Claudio Palomo
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain, Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain, and Institute of Organic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Mikel Oiarbide
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain, Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain, and Institute of Organic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Jesús M. García
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain, Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain, and Institute of Organic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Patricia Bañuelos
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain, Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain, and Institute of Organic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - José M. Odriozola
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain, Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain, and Institute of Organic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Jesús Razkin
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain, Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain, and Institute of Organic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Anthony Linden
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain, Departamento de Química Aplicada, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain, and Institute of Organic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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Gomez-Bengoa E, Linden A, López R, Múgica-Mendiola I, Oiarbide M, Palomo C. Asymmetric Aza-Henry Reaction Under Phase Transfer Catalysis: An Experimental and Theoretical Study. J Am Chem Soc 2008; 130:7955-66. [DOI: 10.1021/ja800253z] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.8] [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)
- Enrique Gomez-Bengoa
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, San Sebastián, 20080, Spain
| | - Anthony Linden
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, San Sebastián, 20080, Spain
| | - Rosa López
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, San Sebastián, 20080, Spain
| | - Idoia Múgica-Mendiola
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, San Sebastián, 20080, Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, San Sebastián, 20080, Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, San Sebastián, 20080, Spain
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Palomo C, Landa A, Mielgo A, Oiarbide M, Puente A, Vera S. Water-Compatible Iminium Activation: Organocatalytic Michael Reactions of Carbon-Centered Nucleophiles with Enals. Angew Chem Int Ed Engl 2007; 46:8431-5. [PMID: 17902088 DOI: 10.1002/anie.200703261] [Citation(s) in RCA: 214] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Claudio Palomo
- Departamento de Química Orgánica I, Universidad del País Vasco, Manuel Lardizabal 3. 20018-San Sebastián, Spain.
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50
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Palomo C, Landa A, Mielgo A, Oiarbide M, Puente Á, Vera S. Water-Compatible Iminium Activation: Organocatalytic Michael Reactions of Carbon-Centered Nucleophiles with Enals. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200703261] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.8] [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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