51
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Xiong B, Zhang SD, Chen L, Li B, Jiang HF, Zhang M. An annulative transfer hydrogenation strategy enables straightforward access to tetrahydro fused-pyrazine derivatives. Chem Commun (Camb) 2016; 52:10636-9. [DOI: 10.1039/c6cc05329g] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A ruthenium-catalyzed annulative transfer hydrogenation strategy, enabling straightforward access to tetrahydro fused-pyrazine derivatives from N-heteroaryl diamines and vicinal diols, is demonstrated.
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Affiliation(s)
- Biao Xiong
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry & Chemical Engineering and State Key Laboratory of Pulp and Paper Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Shu-Di Zhang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry & Chemical Engineering and State Key Laboratory of Pulp and Paper Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Lu Chen
- School of Chemical & Environmental Engineering
- Wuyi University
- Jiangmen 529020
- P. R. China
| | - Bin Li
- School of Chemical & Environmental Engineering
- Wuyi University
- Jiangmen 529020
- P. R. China
| | - Huan-Feng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry & Chemical Engineering and State Key Laboratory of Pulp and Paper Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Min Zhang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry & Chemical Engineering and State Key Laboratory of Pulp and Paper Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
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52
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Zhang YQ, Jakoby V, Stainer K, Schmer A, Klare S, Bauer M, Grimme S, Cuerva JM, Gansäuer A. Amid-substituierte Titanocene für die H-Atom-Transfer-Katalyse. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201509548] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yong-Qiang Zhang
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Verena Jakoby
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Katharina Stainer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Alexander Schmer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Sven Klare
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Mirko Bauer
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische Chemie und Theoretische Chemie; Universität Bonn; Beringstraße 4 53115 Bonn Deutschland
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische Chemie und Theoretische Chemie; Universität Bonn; Beringstraße 4 53115 Bonn Deutschland
| | - Juan Manuel Cuerva
- Department of Organic Chemistry, Faculty of Sciences; Universität Granada; 18071 Granada Spanien
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
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53
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Zhang YQ, Jakoby V, Stainer K, Schmer A, Klare S, Bauer M, Grimme S, Cuerva JM, Gansäuer A. Amide-Substituted Titanocenes in Hydrogen-Atom Transfer Catalysis. Angew Chem Int Ed Engl 2015; 55:1523-6. [DOI: 10.1002/anie.201509548] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Yong-Qiang Zhang
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
| | - Verena Jakoby
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
| | - Katharina Stainer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
| | - Alexander Schmer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
| | - Sven Klare
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
| | - Mirko Bauer
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische Chemie und Theoretische Chemie; Universität Bonn; Beringstraße 4 53115 Bonn Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische Chemie und Theoretische Chemie; Universität Bonn; Beringstraße 4 53115 Bonn Germany
| | - Juan Manuel Cuerva
- Department of Organic Chemistry, Faculty of Sciences; Universität Granada; 18071 Granada Spain
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
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54
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Abstract
Two types of nanomaterials with different morphologies are described in this article: nanoporous metals and titanate nanowires. Both materials are fabricated by a dealloying method. In the former case, the catalytic properties of nanoporous gold and palladium are exemplified by many chemical transformations. The reactions proceed without any support, stabilizer, or ligands. The catalyst can be easily recovered by a simple separation process and reused many times without significant loss of catalytic activity. In the latter case, the dealloying of Ti-Al alloy is described as a new fabrication method for producing ultrafine titanate nanowires. This method does not require high-temperature conditions, which is advantageous for the construction of fine structures. The key to this process is achieving a fine dispersion of intermetallic TiAl3 nanocrystals in the Al matrix in the mother alloy. The resulting nanowires exhibit remarkable Sr(2+) ion-exchange properties.
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Affiliation(s)
- Naoki Asao
- WPI-Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.
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55
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Rosales A, Rodríguez-García I, Muñoz-Bascón J, Roldan-Molina E, Padial NM, Morales LP, García-Ocaña M, Oltra JE. The Nugent Reagent: A Formidable Tool in Contemporary Radical and Organometallic Chemistry. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500292] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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56
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Tarantino KT, Miller DC, Callon TA, Knowles RR. Bond-weakening catalysis: conjugate aminations enabled by the soft homolysis of strong N-H bonds. J Am Chem Soc 2015; 137:6440-3. [PMID: 25945955 PMCID: PMC4657442 DOI: 10.1021/jacs.5b03428] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The ability of redox-active metal centers to weaken the bonds in associated ligands is well precedented, but has rarely been utilized as a mechanism of substrate activation in catalysis. Here we describe a catalytic bond-weakening protocol for conjugate amination wherein the strong N-H bonds in N-aryl amides (N-H bond dissociation free energies ∼100 kcal/mol) are destabilized by ∼33 kcal/mol upon by coordination to a reducing titanocene complex, enabling their abstraction by the weak H-atom acceptor TEMPO through a proton-coupled electron transfer process. Significantly, this soft homolysis mechanism provides a method to generate closed-shell, metalated nucleophiles under neutral conditions in the absence of a Brønsted base.
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Affiliation(s)
- Kyle T. Tarantino
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - David C. Miller
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Ted A. Callon
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Robert R. Knowles
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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57
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Catalytic activity of Ru/tetrahydropyrimidinium salts system for transfer hydrogenation reactions. Appl Organomet Chem 2015. [DOI: 10.1002/aoc.3322] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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58
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Wagh YS, Asao N. Selective Transfer Semihydrogenation of Alkynes with Nanoporous Gold Catalysts. J Org Chem 2015; 80:847-51. [DOI: 10.1021/jo502313d] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Yogesh S. Wagh
- WPI-Advanced
Institute for
Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Naoki Asao
- WPI-Advanced
Institute for
Materials Research, Tohoku University, Sendai 980-8577, Japan
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59
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Kato T, Matsuoka SI, Suzuki M. Transfer hydrogenation promoted by N-heterocyclic carbene and water. Chem Commun (Camb) 2015; 51:13906-9. [DOI: 10.1039/c5cc05117g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
N-Heterocyclic carbenes (NHCs) promote the transfer hydrogenation of various activated CC, CN, and NN bonds with water as the proton source.
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Affiliation(s)
- Terumasa Kato
- Department of Materials Science and Engineering
- Graduate School of Engineering
- Nagoya Institute of Technology
- Nagoya
- Japan
| | - Shin-ichi Matsuoka
- Department of Materials Science and Engineering
- Graduate School of Engineering
- Nagoya Institute of Technology
- Nagoya
- Japan
| | - Masato Suzuki
- Department of Materials Science and Engineering
- Graduate School of Engineering
- Nagoya Institute of Technology
- Nagoya
- Japan
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60
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Rosales A, Muñoz-Bascón J, Roldan-Molina E, Castañeda MA, Padial NM, Gansäuer A, Rodríguez-García I, Oltra JE. Selective Reduction of Aromatic Ketones in Aqueous Medium Mediated by Ti(III)/Mn: A Revised Mechanism. J Org Chem 2014; 79:7672-6. [DOI: 10.1021/jo501141y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Antonio Rosales
- Centro
de Investigación, Estudios y Desarrollo de Ingeniería
(CIEDI); Ingeniería Agroindustrial y Alimentos, Universidad de las Américas, 170513 Quito, Ecuador
| | - Juan Muñoz-Bascón
- Departamento
Química Orgánica, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva s/n, 18071 Granada, Spain
| | - Esther Roldan-Molina
- Departamento
Química Orgánica, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva s/n, 18071 Granada, Spain
| | - Mayra A. Castañeda
- Centro
de Investigación, Estudios y Desarrollo de Ingeniería
(CIEDI); Ingeniería Agroindustrial y Alimentos, Universidad de las Américas, 170513 Quito, Ecuador
| | - Natalia M. Padial
- Departamento
Química Orgánica, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva s/n, 18071 Granada, Spain
| | - Andreas Gansäuer
- Kekulé-Institut
für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, 53127 Bonn, Germany
| | | | - J. Enrique Oltra
- Departamento
Química Orgánica, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva s/n, 18071 Granada, Spain
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61
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Hydrogen Generation by Water Reduction with [Cp*2Ti(OTf)]: Identifying Elemental Mechanistic Steps by Combined In Situ FTIR and In Situ EPR Spectroscopy Supported by DFT Calculations. Chemistry 2013; 19:13705-13. [DOI: 10.1002/chem.201301598] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 07/16/2013] [Indexed: 11/07/2022]
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62
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Schabel T, Belger C, Plietker B. A Mild Chemoselective Ru-Catalyzed Reduction of Alkynes, Ketones, and Nitro Compounds. Org Lett 2013; 15:2858-61. [DOI: 10.1021/ol401185t] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Tobias Schabel
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, DE-70569 Stuttgart, Germany
| | - Christian Belger
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, DE-70569 Stuttgart, Germany
| | - Bernd Plietker
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, DE-70569 Stuttgart, Germany
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63
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Broggi J, Jurčík V, Songis O, Poater A, Cavallo L, Slawin AMZ, Cazin CSJ. The Isolation of [Pd{OC(O)H}(H)(NHC)(PR3)] (NHC = N-Heterocyclic Carbene) and Its Role in Alkene and Alkyne Reductions Using Formic Acid. J Am Chem Soc 2013; 135:4588-91. [DOI: 10.1021/ja311087c] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Julie Broggi
- EaStCHEM School of Chemistry, University of St Andrews, St Andrews KY16 9ST, U.K
| | - Václav Jurčík
- EaStCHEM School of Chemistry, University of St Andrews, St Andrews KY16 9ST, U.K
| | - Olivier Songis
- EaStCHEM School of Chemistry, University of St Andrews, St Andrews KY16 9ST, U.K
| | - Albert Poater
- Institut de Química Computacional,
Departament de Química, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Spain
| | - Luigi Cavallo
- KAUST Catalyst Research Center,
Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900,
Kingdom of Saudi Arabia
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64
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Hauwert P, Dunsford JJ, Tromp DS, Weigand JJ, Lutz M, Cavell KJ, Elsevier CJ. Zerovalent [Pd(NHC)(Alkene)1,2] Complexes Bearing Expanded-Ring N-Heterocyclic Carbene Ligands in Transfer Hydrogenation of Alkynes. Organometallics 2012. [DOI: 10.1021/om300930w] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Peter Hauwert
- Molecular Inorganic Chemistry, Van’t Hoff Institute
for Molecular Sciences, University of Amsterdam, Science Park 904, Postbus 94157, 1090 GD Amsterdam, The Netherlands
| | - Jay J. Dunsford
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - Dorette S. Tromp
- Molecular Inorganic Chemistry, Van’t Hoff Institute
for Molecular Sciences, University of Amsterdam, Science Park 904, Postbus 94157, 1090 GD Amsterdam, The Netherlands
| | - Jan J. Weigand
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149 Münster, Germany
| | - Martin Lutz
- Crystal
and Structural Chemistry, Bijvoet Center for Biomolecular
Research, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Kingsley J. Cavell
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - Cornelis J. Elsevier
- Molecular Inorganic Chemistry, Van’t Hoff Institute
for Molecular Sciences, University of Amsterdam, Science Park 904, Postbus 94157, 1090 GD Amsterdam, The Netherlands
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65
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Oger C, Balas L, Durand T, Galano JM. Are alkyne reductions chemo-, regio-, and stereoselective enough to provide pure (Z)-olefins in polyfunctionalized bioactive molecules? Chem Rev 2012. [PMID: 23194255 DOI: 10.1021/cr3001753] [Citation(s) in RCA: 251] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Camille Oger
- Institut des Biomolécules Max Mousseron, UMR CNRS 5247, Université Montpellier 1, Faculté de Pharmacie, 15 av. Charles Flahault, Bât. D, 34093 Montpellier Cedex 05, France
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66
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Rosales A, Muñoz-Bascón J, López-Sánchez C, Álvarez-Corral M, Muñoz-Dorado M, Rodríguez-García I, Oltra JE. Ti-Catalyzed Homolytic Opening of Ozonides: A Sustainable C–C Bond-Forming Reaction. J Org Chem 2012; 77:4171-6. [DOI: 10.1021/jo300344a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Antonio Rosales
- Department of Organic Chemistry, Faculty of Sciences, University of Granada, 18071 Granada, Spain
| | - Juan Muñoz-Bascón
- Department of Organic Chemistry, Faculty of Sciences, University of Granada, 18071 Granada, Spain
| | | | | | - Manuel Muñoz-Dorado
- Department of Organic Chemistry, University of Almería, 04120 Almería,
Spain
| | | | - J. Enrique Oltra
- Department of Organic Chemistry, Faculty of Sciences, University of Granada, 18071 Granada, Spain
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67
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Gansäuer A, Behlendorf M, Cangönül A, Kube C, Cuerva JM, Friedrich J, van Gastel M. H2O-Aktivierung für den Wasserstoffatom-Transfer: korrekte Strukturen, revidierte Mechanismen. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201107556] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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68
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Gansäuer A, Behlendorf M, Cangönül A, Kube C, Cuerva JM, Friedrich J, van Gastel M. H2O activation for hydrogen-atom transfer: correct structures and revised mechanisms. Angew Chem Int Ed Engl 2012; 51:3266-70. [PMID: 22337565 DOI: 10.1002/anie.201107556] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Indexed: 11/09/2022]
Affiliation(s)
- Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany.
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69
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de Cienfuegos LÁ, Robles R, Miguel D, Justicia J, Cuerva JM. Reduction reactions in green solvents: water, supercritical carbon dioxide, and ionic liquids. CHEMSUSCHEM 2011; 4:1035-1048. [PMID: 21826799 DOI: 10.1002/cssc.201100134] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2011] [Revised: 04/29/2011] [Indexed: 05/31/2023]
Affiliation(s)
- Luis Álvarez de Cienfuegos
- Department of Organic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071 Granada, Spain.
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70
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Gansäuer A, Shi L, Otte M, Huth I, Rosales A, Sancho-Sanz I, Padial NM, Oltra JE. Hydrogen atom donors: recent developments. Top Curr Chem (Cham) 2011; 320:93-120. [PMID: 21452081 DOI: 10.1007/128_2011_124] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
This review highlights recent developments in the field of hydrogen atom transfer (HAT) reagents that circumvent the disadvantages of classical group 14 reagents, such as Bu₃SnH. Special emphasis is laid on the lowering of bond dissociation energies (BDEs) of molecules that could, as yet, not be used as HAT reagents and on the use of organometallic HAT reagents.
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Affiliation(s)
- Andreas Gansäuer
- Kekulé Institut für Organische Chemie und Biochemie der Universität Bonn, Germany.
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71
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Hauwert P, Boerleider R, Warsink S, Weigand JJ, Elsevier CJ. Mechanism of Pd(NHC)-Catalyzed Transfer Hydrogenation of Alkynes. J Am Chem Soc 2010; 132:16900-10. [DOI: 10.1021/ja1062407] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peter Hauwert
- Molecular Inorganic Chemistry, Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, Postbus 94157, 1090 GD Amsterdam, The Netherlands, and Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149, Münster, Germany
| | - Romilda Boerleider
- Molecular Inorganic Chemistry, Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, Postbus 94157, 1090 GD Amsterdam, The Netherlands, and Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149, Münster, Germany
| | - Stefan Warsink
- Molecular Inorganic Chemistry, Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, Postbus 94157, 1090 GD Amsterdam, The Netherlands, and Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149, Münster, Germany
| | - Jan J. Weigand
- Molecular Inorganic Chemistry, Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, Postbus 94157, 1090 GD Amsterdam, The Netherlands, and Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149, Münster, Germany
| | - Cornelis J. Elsevier
- Molecular Inorganic Chemistry, Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, Postbus 94157, 1090 GD Amsterdam, The Netherlands, and Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149, Münster, Germany
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72
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Paradas M, Campaña AG, Jiménez T, Robles R, Oltra JE, Buñuel E, Justicia J, Cárdenas DJ, Cuerva JM. Understanding the Exceptional Hydrogen-Atom Donor Characteristics of Water in TiIII-Mediated Free-Radical Chemistry. J Am Chem Soc 2010; 132:12748-56. [DOI: 10.1021/ja105670h] [Citation(s) in RCA: 112] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Miguel Paradas
- Department of Organic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain, and Department of Organic Chemistry, Faculty of Sciences, Universidad Autónoma de Madrid, Cantoblanco E-28049, Madrid, Spain
| | - Araceli G. Campaña
- Department of Organic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain, and Department of Organic Chemistry, Faculty of Sciences, Universidad Autónoma de Madrid, Cantoblanco E-28049, Madrid, Spain
| | - Tania Jiménez
- Department of Organic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain, and Department of Organic Chemistry, Faculty of Sciences, Universidad Autónoma de Madrid, Cantoblanco E-28049, Madrid, Spain
| | - Rafael Robles
- Department of Organic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain, and Department of Organic Chemistry, Faculty of Sciences, Universidad Autónoma de Madrid, Cantoblanco E-28049, Madrid, Spain
| | - J. Enrique Oltra
- Department of Organic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain, and Department of Organic Chemistry, Faculty of Sciences, Universidad Autónoma de Madrid, Cantoblanco E-28049, Madrid, Spain
| | - Elena Buñuel
- Department of Organic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain, and Department of Organic Chemistry, Faculty of Sciences, Universidad Autónoma de Madrid, Cantoblanco E-28049, Madrid, Spain
| | - José Justicia
- Department of Organic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain, and Department of Organic Chemistry, Faculty of Sciences, Universidad Autónoma de Madrid, Cantoblanco E-28049, Madrid, Spain
| | - Diego J. Cárdenas
- Department of Organic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain, and Department of Organic Chemistry, Faculty of Sciences, Universidad Autónoma de Madrid, Cantoblanco E-28049, Madrid, Spain
| | - Juan M. Cuerva
- Department of Organic Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain, and Department of Organic Chemistry, Faculty of Sciences, Universidad Autónoma de Madrid, Cantoblanco E-28049, Madrid, Spain
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73
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Paradas M, Campaña AG, Marcos ML, Justicia J, Haidour A, Robles R, Cárdenas DJ, Oltra JE, Cuerva JM. Unprecedented H-atom transfer from water to ketyl radicals mediated by Cp2TiCl. Dalton Trans 2010; 39:8796-800. [DOI: 10.1039/c001689f] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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74
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Mixed disproportionation versus radical trapping in titanocene(III)-promoted epoxide openings. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.10.038] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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75
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Paradas M, Campaña AG, Estévez RE, Alvarez de Cienfuegos L, Jiménez T, Robles R, Cuerva JM, Oltra JE. Unexpected Ti(III)/Mn-promoted pinacol coupling of ketones. J Org Chem 2009; 74:3616-9. [PMID: 19334701 DOI: 10.1021/jo9005238] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Titanocene(III) chemistry has emerged in the last decades as an indispensable tool in C-C bond-forming reactions. In this context, pinacol and related reactions allow the stereoselective synthesis of vicinal diols. In this work, we present new applications of these reactions using as starting materials aromatic ketones. Simple and smooth reaction conditions have been developed and have been applied for inter- and intramolecular processes. We also describe that although Cp(2)TiCl is usually used as a monoelectronic reducing agent, it can be also used as an efficient Lewis acid.
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Affiliation(s)
- Miguel Paradas
- Department of Organic Chemistry, Faculty of Sciences, University of Granada, E-18071 Granada, Spain
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76
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Gansäuer A, Otte M, Piestert F, Fan CA. Sustainable radical reduction through catalyzed hydrogen atom transfer reactions (CHAT-reactions). Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.03.088] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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77
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Mechanistic evaluation of metal-catalyzed hydrogen-transfer processes: The Shvo catalyst as an example of computational unravelling. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2008.11.043] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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78
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Irfan M, Petricci E, Glasnov TN, Taddei M, Kappe CO. Continuous Flow Hydrogenation of Functionalized Pyridines. European J Org Chem 2009. [DOI: 10.1002/ejoc.200801131] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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79
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80
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Barrios-Francisco R, García JJ. Stereoselective Hydrogenation of Aromatic Alkynes Using Water, Triethylsilane, or Methanol, Mediated and Catalyzed by Ni(0) Complexes. Inorg Chem 2008; 48:386-93. [DOI: 10.1021/ic801823x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Juventino J. García
- Facultad de Química, Universidad Nacional Autónoma de México, México D. F. 04510, México
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81
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Hauwert P, Maestri G, Sprengers JW, Catellani M, Elsevier C. Transfer Semihydrogenation of Alkynes Catalyzed by a Zero-Valent Palladium N-Heterocyclic Carbene Complex. Angew Chem Int Ed Engl 2008; 47:3223-6. [DOI: 10.1002/anie.200705638] [Citation(s) in RCA: 152] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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82
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Hauwert P, Maestri G, Sprengers JW, Catellani M, Elsevier C. Transfer Semihydrogenation of Alkynes Catalyzed by a Zero-Valent Palladium N-Heterocyclic Carbene Complex. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200705638] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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83
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Tantawy W, Zipse H. Hydroxylic Solvents as Hydrogen Atom Donors in Radical Reactions. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700948] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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