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Grayson JD, Dennis FM, Robertson CC, Partridge BM. Chan-Lam Amination of Secondary and Tertiary Benzylic Boronic Esters. J Org Chem 2021; 86:9883-9897. [PMID: 34169720 DOI: 10.1021/acs.joc.1c00976] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We report a Chan-Lam coupling reaction of benzylic and allylic boronic esters with primary and secondary anilines to form valuable alkyl amine products. Both secondary and tertiary boronic esters can be used as coupling partners, with mono-alkylation of the aniline occurring selectively. This is a rare example of a transition-metal-mediated transformation of a tertiary alkylboron reagent. Initial investigation into the reaction mechanism suggests that transmetalation from B to Cu occurs through a single-electron, rather than a two-electron process.
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Affiliation(s)
- James D Grayson
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Francesca M Dennis
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Craig C Robertson
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
| | - Benjamin M Partridge
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield S3 7HF, United Kingdom
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Akter M, Anbarasan P. (Cyclopentadienone)iron Complexes: Synthesis, Mechanism and Applications in Organic Synthesis. Chem Asian J 2021; 16:1703-1724. [PMID: 33999506 DOI: 10.1002/asia.202100400] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/12/2021] [Indexed: 12/22/2022]
Abstract
(Cyclopentadienone)iron tricarbonyl complexes are catalytically active, inexpensive, easily accessible and air-stable that are extensively studied as an active pre-catalyst in homogeneous catalysis. Its versatile catalytic activity arises exclusively due to the presence of a non-innocent ligand, which can trigger its unique redox properties effectively. These complexes have been employed widely in (transfer)hydrogenation (e. g., reduction of polar multiple bonds, Oppenauer-type oxidation of alcohols), C-C and C-N bond formation (e. g., reductive aminations, α-alkylation of ketones) and other synthetic transformations. In this review, we discuss the remarkable advancement of its various synthetic applications along with synthesis and mechanistic studies, until February 2021.
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Affiliation(s)
- Monalisa Akter
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Pazhamalai Anbarasan
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
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Coufourier S, Ndiaye D, Gaillard QG, Bettoni L, Joly N, Mbaye MD, Poater A, Gaillard S, Renaud JL. Iron-catalyzed chemoselective hydride transfer reactions. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132187] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Pignataro L, Gennari C. Recent Catalytic Applications of (Cyclopentadienone)iron Complexes. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901925] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Luca Pignataro
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi 19-20133 Milan Italy
| | - Cesare Gennari
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi 19-20133 Milan Italy
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Wei D, Bruneau‐Voisine A, Dubois M, Bastin S, Sortais J. Manganese‐Catalyzed Transfer Hydrogenation of Aldimines. ChemCatChem 2019. [DOI: 10.1002/cctc.201900314] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Duo Wei
- Univ RennesCNRS, ISCR – UMR 6226 35000 Rennes France
- LCC-CNRS, CNRS, UPSUniversité de Toulouse Toulouse France
| | - Antoine Bruneau‐Voisine
- Univ RennesCNRS, ISCR – UMR 6226 35000 Rennes France
- LCC-CNRS, CNRS, UPSUniversité de Toulouse Toulouse France
| | - Maxime Dubois
- LCC-CNRS, CNRS, UPSUniversité de Toulouse Toulouse France
| | | | - Jean‐Baptiste Sortais
- LCC-CNRS, CNRS, UPSUniversité de Toulouse Toulouse France
- Institut Universitaire de France 1 rue Descartes 75231 Paris Cedex 05 France
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Saini A, Smith CR, Wekesa FS, Helms AK, Findlater M. Conversion of aldimines to secondary amines using iron-catalysed hydrosilylation. Org Biomol Chem 2019; 16:9368-9372. [PMID: 30516772 DOI: 10.1039/c8ob01262h] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Iron-catalyzed hydrosilylation of imines to amines using a well-defined iron complex is reported. This method employs relatively mild conditions, by reaction of imine, (EtO)3SiH in a 1 : 2 ratio in the presence of 1 mol% precatalyst ([BIAN]Fe(η6-toluene), 3, BIAN = bis(2,6-diisopropylaniline)acenaphthene) at 70 °C. A broad scope of imines was readily converted into the corresponding secondary amines without the need for precatalyst activators.
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Affiliation(s)
- Anu Saini
- Department of Chemistry & Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, USA.
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Chiral (cyclopentadienone)iron complexes with a stereogenic plane as pre-catalysts for the asymmetric hydrogenation of polar double bonds. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.01.057] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Affiliation(s)
- Duo Wei
- Univ Rennes, CNRS, ISCR-UMR 6226, F-35000 Rennes, France
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Bauri S, Donthireddy SNR, Illam PM, Rit A. Effect of Ancillary Ligand in Cyclometalated Ru(II)-NHC-Catalyzed Transfer Hydrogenation of Unsaturated Compounds. Inorg Chem 2018; 57:14582-14593. [PMID: 30421610 DOI: 10.1021/acs.inorgchem.8b02246] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In an effort to develop efficient Ru(II)-NHC-based catalyst considering their stereoelectronic effect for hydride-transfer reaction, we found that the ancillary NHC ligand can play a significant role in its catalytic performance. This effect is demonstrated by comparing the activity of two different types of orthometalated precatalysts of general formula [( p-cymene)(NHC)RuII(X)] (NHC = an imidazolylidene-based ImNHC, compound 2a-c, or a mesoionic triazolylidene-based tzNHC, compound 4) in transfer hydrogenation of carbonyl substrates. The electron-rich precatalyst, 2c, containing p-OMe-substituted NHC ligand performed significantly better than both unsubstituted complex 2a and p-CF3 substituted electron-poor complex 2b in ketone reduction. Whereas bulky mesoionic triazolylidene ligand containing complex 4 was found to be superior catalyst for aldehyde reduction and the precatalyst 2a is more suitable for the selective transfer hydrogenation of a wide range of aromatic aldimines to amines. To the best of our knowledge, this is the first systematic study on the effect of stereoelectronic tuning of ancillary orthometalated NHC ligand in Ru(II)-catalyzed transfer hydrogenations of various types of unsaturated compounds with broad substrate scope.
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Affiliation(s)
- Somnath Bauri
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India
| | - S N R Donthireddy
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India
| | | | - Arnab Rit
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India
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Cettolin M, Bai X, Lübken D, Gatti M, Facchini SV, Piarulli U, Pignataro L, Gennari C. Improving C=N Bond Reductions with (Cyclopentadienone)iron Complexes: Scope and Limitations. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801348] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Mattia Cettolin
- Dipartimento di Chimica, Via C. Golgi, 19 ‐ Università degli Studi di Milano 20133 Milan Italy
| | - Xishan Bai
- Dipartimento di Chimica, Via C. Golgi, 19 ‐ Università degli Studi di Milano 20133 Milan Italy
| | - Dennis Lübken
- Dipartimento di Chimica, Via C. Golgi, 19 ‐ Università degli Studi di Milano 20133 Milan Italy
| | - Marco Gatti
- Dipartimento di Chimica, Via C. Golgi, 19 ‐ Università degli Studi di Milano 20133 Milan Italy
| | - Sofia Vailati Facchini
- Università degli Studi dell'Insubria Dipartimento di Scienza e Alta Tecnologia Via Valleggio, 11 22100 Como Italy
| | - Umberto Piarulli
- Università degli Studi dell'Insubria Dipartimento di Scienza e Alta Tecnologia Via Valleggio, 11 22100 Como Italy
| | - Luca Pignataro
- Dipartimento di Chimica, Via C. Golgi, 19 ‐ Università degli Studi di Milano 20133 Milan Italy
| | - Cesare Gennari
- Dipartimento di Chimica, Via C. Golgi, 19 ‐ Università degli Studi di Milano 20133 Milan Italy
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Li Y, Lei M, Yuan W, Meggers E, Gong L. An N-heterocyclic carbene iridium catalyst with metal-centered chirality for enantioselective transfer hydrogenation of imines. Chem Commun (Camb) 2018; 53:8089-8092. [PMID: 28677698 DOI: 10.1039/c7cc04691j] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A cyclometalating N-heterocyclic carbene iridium complex featuring metal-centered chirality was designed and used for the asymmetric transfer hydrogenation (ATH) of imines. Four strongly σ-donating carbon-based substituents (2 carbenes and 2 phenyl moieties), a chirality transfer directly from the stereogenic metal center to the C[double bond, length as m-dash]N bond of substrates, as well as a restriction of catalyst deactivation by steric demanding substituents, render the new complex one of the most efficient catalysts for ATH of cyclic N-sulfonylimines (down to 0.01 mol% cat., 24 examples, 94-98% ee).
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Affiliation(s)
- Yanjun Li
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China.
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Vayer M, Morcillo SP, Dupont J, Gandon V, Bour C. Iron-Catalyzed Reductive Ethylation of Imines with Ethanol. Angew Chem Int Ed Engl 2018; 57:3228-3232. [PMID: 29393563 DOI: 10.1002/anie.201800328] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 01/30/2018] [Indexed: 12/24/2022]
Abstract
The borrowing hydrogen strategy has been applied to the ethylation of imines with an air-stable iron complex as precatalyst. This approach opens new perspectives in this area as it enables the synthesis of unsymmetric tertiary amines from readily available substrates and ethanol as a C2 building block. A variety of imines bearing electron-rich aryl or alkyl groups at the nitrogen atom could be efficiently reductively alkylated without the need for molecular hydrogen. The mechanism of this reaction, which shows complete selectivity for ethanol over other alcohols, has been studied experimentally and by means of DFT computations.
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Affiliation(s)
- Marie Vayer
- ICMMO, CNRS UMR 8182, Univ Paris-Sud, Université Paris-Saclay, Bât. 420, 91405, Orsay cedex, France
| | - Sara P Morcillo
- ICMMO, CNRS UMR 8182, Univ Paris-Sud, Université Paris-Saclay, Bât. 420, 91405, Orsay cedex, France
| | - Jennifer Dupont
- ICMMO, CNRS UMR 8182, Univ Paris-Sud, Université Paris-Saclay, Bât. 420, 91405, Orsay cedex, France
| | - Vincent Gandon
- ICMMO, CNRS UMR 8182, Univ Paris-Sud, Université Paris-Saclay, Bât. 420, 91405, Orsay cedex, France.,Laboratoire de Chimie Moléculaire, CNRS UMR 9168, Ecole Polytechnique, Université Paris-Saclay, route de Saclay, 91128, Palaiseau cedex, France
| | - Christophe Bour
- ICMMO, CNRS UMR 8182, Univ Paris-Sud, Université Paris-Saclay, Bât. 420, 91405, Orsay cedex, France
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Vayer M, Morcillo SP, Dupont J, Gandon V, Bour C. Iron-Catalyzed Reductive Ethylation of Imines with Ethanol. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800328] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Marie Vayer
- ICMMO, CNRS UMR 8182, Univ Paris-Sud; Université Paris-Saclay; Bât. 420 91405 Orsay cedex France
| | - Sara P. Morcillo
- ICMMO, CNRS UMR 8182, Univ Paris-Sud; Université Paris-Saclay; Bât. 420 91405 Orsay cedex France
| | - Jennifer Dupont
- ICMMO, CNRS UMR 8182, Univ Paris-Sud; Université Paris-Saclay; Bât. 420 91405 Orsay cedex France
| | - Vincent Gandon
- ICMMO, CNRS UMR 8182, Univ Paris-Sud; Université Paris-Saclay; Bât. 420 91405 Orsay cedex France
- Laboratoire de Chimie Moléculaire, CNRS UMR 9168; Ecole Polytechnique; Université Paris-Saclay; route de Saclay 91128 Palaiseau cedex France
| | - Christophe Bour
- ICMMO, CNRS UMR 8182, Univ Paris-Sud; Université Paris-Saclay; Bât. 420 91405 Orsay cedex France
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Facchini SV, Cettolin M, Bai X, Casamassima G, Pignataro L, Gennari C, Piarulli U. Efficient Synthesis of Amines by Iron-Catalyzed C=N Transfer Hydrogenation and C=O Reductive Amination. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701316] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sofia Vailati Facchini
- Dipartimento di Scienza e Alta Tecnologia; Università degli Studi dell'Insubria; Via Valleggio, 11 - 22100 Como Italy
| | - Mattia Cettolin
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 - 20133 Milano Italy
| | - Xishan Bai
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 - 20133 Milano Italy
| | - Giuseppe Casamassima
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 - 20133 Milano Italy
| | - Luca Pignataro
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 - 20133 Milano Italy
| | - Cesare Gennari
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 - 20133 Milano Italy
| | - Umberto Piarulli
- Dipartimento di Scienza e Alta Tecnologia; Università degli Studi dell'Insubria; Via Valleggio, 11 - 22100 Como Italy
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van Slagmaat CAMR, De Wildeman SMA. A Comparative Study of Structurally Related Homogeneous Ruthenium and Iron Catalysts for the Hydrogenation of Levulinic Acid to γ-Valerolactone. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700938] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Christian A. M. R. van Slagmaat
- Aachen Maastricht Institute for Biobased Materials (AMIBM); Faculty of Humanities and Sciences; Maastricht University; Brightlands Chemelot Campus 6167 RD Geleen The Netherlands
| | - Stefaan M. A. De Wildeman
- Aachen Maastricht Institute for Biobased Materials (AMIBM); Faculty of Humanities and Sciences; Maastricht University; Brightlands Chemelot Campus 6167 RD Geleen The Netherlands
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