51
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Zhao D, Xie Z. Visible-Light-Promoted Photocatalytic B−C Coupling via a Boron-Centered Carboranyl Radical: Facile Synthesis of B(3)-Arylatedo-Carboranes. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511251] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Da Zhao
- Department of Chemistry and State Key Laboratory of Synthetic, Chemistry; The Chinese University of Hong Kong; Shatin, N.T. Hong Kong China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic, Chemistry; The Chinese University of Hong Kong; Shatin, N.T. Hong Kong China
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52
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53
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Liu T, Chen LY, Sun Z. Asymmetric Reduction of tert-Butanesulfinyl Ketimines by N-Heterocyclic Carbene Boranes. J Org Chem 2015; 80:11441-6. [DOI: 10.1021/acs.joc.5b02084] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tao Liu
- College of Chemistry and
Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, China
| | - Ling-yan Chen
- College of Chemistry and
Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, China
| | - Zhihua Sun
- College of Chemistry and
Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, China
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54
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Duret G, Quinlan R, Bisseret P, Blanchard N. Boron chemistry in a new light. Chem Sci 2015; 6:5366-5382. [PMID: 28717443 PMCID: PMC5502392 DOI: 10.1039/c5sc02207j] [Citation(s) in RCA: 109] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 07/30/2015] [Indexed: 12/20/2022] Open
Abstract
Photocatalysis has recently opened up new avenues for the generation of radical species under visible light irradiation conditions. A particularly fascinating class of photocatalyzed transformations relies on the activation of stable boron species with visible-light since it allows the creation of boryl and/or carbon radicals through single electron transfer or energy transfer without the need for specific and costly equipment. This new paradigm has found numerous applications in synthetic organic chemistry, catalysis, and macromolecular chemistry. In this minireview, the concepts underlying photoactivation of boron-species as well as applications to the creation of C-H, C-C, C-O, B-C and B-S bond are discussed.
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Affiliation(s)
- Guillaume Duret
- Laboratoire de Chimie Moléculaire , Université de Strasbourg , CNRS UMR 7509 , ECPM , 25 rue Becquerel , 67087 Strasbourg , France . ;
| | - Robert Quinlan
- Laboratoire de Chimie Moléculaire , Université de Strasbourg , CNRS UMR 7509 , ECPM , 25 rue Becquerel , 67087 Strasbourg , France . ;
| | - Philippe Bisseret
- Laboratoire de Chimie Moléculaire , Université de Strasbourg , CNRS UMR 7509 , ECPM , 25 rue Becquerel , 67087 Strasbourg , France . ;
| | - Nicolas Blanchard
- Laboratoire de Chimie Moléculaire , Université de Strasbourg , CNRS UMR 7509 , ECPM , 25 rue Becquerel , 67087 Strasbourg , France . ;
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55
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Wu H, Garcia JM, Haeffner F, Radomkit S, Zhugralin AR, Hoveyda AH. Mechanism of NHC-Catalyzed Conjugate Additions of Diboron and Borosilane Reagents to α,β-Unsaturated Carbonyl Compounds. J Am Chem Soc 2015; 137:10585-602. [PMID: 26263513 DOI: 10.1021/jacs.5b06745] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Broadly applicable enantioselective C-B and C-Si bond-forming processes catalyzed by an N-heterocyclic carbene (NHC) were recently introduced; these boryl and silyl conjugate addition reactions (BCA and SCA, respectively), which proceed without the need for a transition-metal complex, represent reaction pathways that are distinct from those facilitated by transition-metal-containing species (e.g., Cu, Ni, Pt, Pd, or Rh based). The Lewis-base-catalyzed (NHC) transformations are valuable to chemical synthesis, as they can generate high enantioselectivities and possess unique chemoselectivity profiles. Here, the results of investigations that elucidate the principal features of the NHC-catalyzed BCA and SCA processes are detailed. Spectroscopic evidence is provided illustrating why the presence of excess base and MeOH or H2O is required for efficient and enantioselective boryl and silyl addition reactions. It is demonstrated that the proton sources influence the efficiency and/or enantioselectivity of NHC-catalyzed enantioselective transformations in several ways. The positive, and at times adverse, impact of water (biphasic conditions) on catalytic enantioselective silyl addition reactions is analyzed. It is shown that a proton source can facilitate nonenantioselective background reactions and NHC decomposition, requiring the catalyst to surpass such complications. Stereochemical models are presented that account for the identity of the observed major enantiomers, providing a rationale for the differences in selectivity profiles of BCA and SCA processes.
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Affiliation(s)
- Hao Wu
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | - Jeannette M Garcia
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | - Fredrik Haeffner
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | - Suttipol Radomkit
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | - Adil R Zhugralin
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | - Amir H Hoveyda
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
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56
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Kawamoto T, Geib SJ, Curran DP. Radical Reactions of N-Heterocyclic Carbene Boranes with Organic Nitriles: Cyanation of NHC-Boranes and Reductive Decyanation of Malononitriles. J Am Chem Soc 2015; 137:8617-22. [DOI: 10.1021/jacs.5b04677] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takuji Kawamoto
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Steven J. Geib
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Dennis P. Curran
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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57
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Damodaran K, Li X, Pan X, Curran DP. Dynamic Behavior of N-Heterocyclic Carbene Boranes: Boron–Carbene Bonds in B,B-Disubstituted N,N-Dimethylimidazol-2-ylidene Boranes Have Substantial Rotation Barriers. J Org Chem 2015; 80:4465-9. [DOI: 10.1021/acs.joc.5b00324] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Krishnan Damodaran
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Xiben Li
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Xiangcheng Pan
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Dennis P. Curran
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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58
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Franz D, Irran E, Inoue S. Isolierung eines dreifach koordinierten Borkations mit einer Bor-Schwefel-Doppelbindung. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407809] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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59
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Franz D, Irran E, Inoue S. Isolation of a Three-Coordinate Boron Cation with a Boron-Sulfur Double Bond. Angew Chem Int Ed Engl 2014; 53:14264-8. [DOI: 10.1002/anie.201407809] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Indexed: 11/08/2022]
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60
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Isolation of a Neutral Boron‐Containing Radical Stabilized by a Cyclic (Alkyl)(Amino)Carbene. Angew Chem Int Ed Engl 2014; 53:7360-3. [DOI: 10.1002/anie.201403514] [Citation(s) in RCA: 141] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 05/06/2014] [Indexed: 11/07/2022]
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61
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Bissinger P, Braunschweig H, Damme A, Krummenacher I, Phukan AK, Radacki K, Sugawara S. Isolierung eines neutralen, Bor‐haltigen Radikals, stabilisiert durch ein cyclisches (Alkyl)(amino)carben. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403514] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Philipp Bissinger
- Institut für Anorganische Chemie, Julius‐Maximilians‐Universität Würzburg, Am Hubland, 97074 Würzburg (Deutschland)
| | - Holger Braunschweig
- Institut für Anorganische Chemie, Julius‐Maximilians‐Universität Würzburg, Am Hubland, 97074 Würzburg (Deutschland)
| | - Alexander Damme
- Institut für Anorganische Chemie, Julius‐Maximilians‐Universität Würzburg, Am Hubland, 97074 Würzburg (Deutschland)
| | - Ivo Krummenacher
- Institut für Anorganische Chemie, Julius‐Maximilians‐Universität Würzburg, Am Hubland, 97074 Würzburg (Deutschland)
| | | | - Krzysztof Radacki
- Institut für Anorganische Chemie, Julius‐Maximilians‐Universität Würzburg, Am Hubland, 97074 Würzburg (Deutschland)
| | - Shun Sugawara
- Department of Chemistry, Graduate School of Science, Hiroshima University (Japan)
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62
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Pan X, Curran DP. Neutral Sulfur Nucleophiles: Synthesis of Thioethers and Thioesters by Substitution Reactions of N-Heterocyclic Carbene Boryl Sulfides and Thioamides. Org Lett 2014; 16:2728-31. [DOI: 10.1021/ol5010164] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiangcheng Pan
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Dennis P. Curran
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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63
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Pan X, Lalevée J, Lacôte E, Curran DP. Disulfides and Boryl Sulfides Serve as both Initiators and Precatalysts in Radical Reductions of Halides by an N‐Heterocyclic Carbene⋅Borane. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300752] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xiangcheng Pan
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Jacques Lalevée
- Institut de Science des Matériaux de Mulhouse IS2 M – LRC CNRS 7228 – ENSCMu‐UHA, 15 rue Jean Starcky, 68057 Mulhouse Cedex, France
| | - Emmanuel Lacôte
- ICSN CNRS, Avenue de la Terrasse, 91198 Gif‐sur‐Yvette Cedex, France
- Université de Lyon, Institut de chimie de Lyon, UMR 5265 CNRS – Université Lyon I – ESCPE Lyon, 43 Bd du 11 novembre 1918, 69616 Villeurbanne, France
| | - Dennis P. Curran
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
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64
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Telitel S, Vallet AL, Schweizer S, Delpech B, Blanchard N, Morlet-Savary F, Graff B, Curran DP, Robert M, Lacôte E, Lalevée J. Formation of N-Heterocyclic Carbene–Boryl Radicals through Electrochemical and Photochemical Cleavage of the B–S bond in N-Heterocyclic Carbene–Boryl Sulfides. J Am Chem Soc 2013; 135:16938-47. [DOI: 10.1021/ja4066267] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sofia Telitel
- Institut
de Science des Matériaux de Mulhouse IS2M (UMR CNRS 7361), Université de Haute Alsace, 15 rue Jean Starcky, 68057 Mulhouse Cedex, France
| | | | - Stéphane Schweizer
- Laboratoire
de Chimie Organique et Bioorganique (EA 4566), Université de Haute-Alsace-ENSCMu, 3 rue Alfred Werner, 68093 Mulhouse Cedex, France
| | - Bernard Delpech
- ICSN CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex France
| | - Nicolas Blanchard
- Laboratoire
de Chimie Moléculaire (UMR CNRS 7509), École Européenne
de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg, France
| | - Fabrice Morlet-Savary
- Institut
de Science des Matériaux de Mulhouse IS2M (UMR CNRS 7361), Université de Haute Alsace, 15 rue Jean Starcky, 68057 Mulhouse Cedex, France
| | - Bernadette Graff
- Institut
de Science des Matériaux de Mulhouse IS2M (UMR CNRS 7361), Université de Haute Alsace, 15 rue Jean Starcky, 68057 Mulhouse Cedex, France
| | - Dennis P. Curran
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 United States
| | - Marc Robert
- Laboratoire
d’Électrochimie Moléculaire (UMR CNRS 7591), Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, 75013 Paris, France
| | - Emmanuel Lacôte
- Institut
de chimie de Lyon, Université de Lyon, UMR 5265 CNRS-Université Lyon I-ESCPE Lyon, 43 Bd du 11 novembre 1918, 69616 Villeurbanne, France
| | - Jacques Lalevée
- Institut
de Science des Matériaux de Mulhouse IS2M (UMR CNRS 7361), Université de Haute Alsace, 15 rue Jean Starcky, 68057 Mulhouse Cedex, France
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