51
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Janes T, Diskin‐Posner Y, Milstein D. Synthesis and Reactivity of Cationic Boron Complexes Distorted by Pyridine‐based Pincer Ligands: Isolation of a Photochemical Hofmann–Martius‐type Intermediate. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000406] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Trevor Janes
- Department of Organic ChemistryWeizmann Institute of Science Rehovot 76100 Israel
| | - Yael Diskin‐Posner
- Chemical Research SupportWeizmann Institute of Science Rehovot 76100 Israel
| | - David Milstein
- Department of Organic ChemistryWeizmann Institute of Science Rehovot 76100 Israel
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52
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Sokolovicz YCA, Nieto Faza O, Specklin D, Jacques B, López CS, dos Santos JHZ, Schrekker HS, Dagorne S. Acetate-catalyzed hydroboration of CO2 for the selective formation of methanol-equivalent products. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00118j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The acetate anion is a highly robust and effective catalyst for the selective hydroboration of CO2 to methanol-equivalent products.
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Affiliation(s)
| | - Olalla Nieto Faza
- Epto. Química Orgánica
- Universidade de Vigo
- Facultade de Ciencias
- Ourense
- Spain
| | - David Specklin
- Institute of Chemistry
- Université de Strasbourg
- CNRS
- Strasbourg
- France
| | - Béatrice Jacques
- Institute of Chemistry
- Université de Strasbourg
- CNRS
- Strasbourg
- France
| | - Carlos Silva López
- Epto. Química Orgánica
- Universidade de Vigo
- Facultade de Ciencias
- Ourense
- Spain
| | | | - Henri S. Schrekker
- Institute of Chemistry
- Universidade Federal do Rio Grande do Sul
- Porto Alegre
- Brazil
| | - Samuel Dagorne
- Institute of Chemistry
- Université de Strasbourg
- CNRS
- Strasbourg
- France
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53
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Terlecki M, Justyniak I, Prochowicz D, Lewiński J. A New Look on Octet‐Compliant Macrocyclic Organoaluminum Carboxylates as Dormant Poly‐Lewis Acids. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201901288] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Michał Terlecki
- Institute of Physical Chemistry Polish Academy of Sciences Kasprzaka 44/52 01‐224 Warsaw Poland
- Faculty of Chemistry Warsaw University of Technology Noakowskiego 3 00‐664 Warsaw Poland
| | - Iwona Justyniak
- Institute of Physical Chemistry Polish Academy of Sciences Kasprzaka 44/52 01‐224 Warsaw Poland
| | - Daniel Prochowicz
- Institute of Physical Chemistry Polish Academy of Sciences Kasprzaka 44/52 01‐224 Warsaw Poland
| | - Janusz Lewiński
- Institute of Physical Chemistry Polish Academy of Sciences Kasprzaka 44/52 01‐224 Warsaw Poland
- Faculty of Chemistry Warsaw University of Technology Noakowskiego 3 00‐664 Warsaw Poland
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54
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Chakraborty G, Balinin K, Portale G, Loznik M, Polushkin E, Weil T, Herrmann A. Electrostatically PEGylated DNA enables salt-free hybridization in water. Chem Sci 2019; 10:10097-10105. [PMID: 32055364 PMCID: PMC6991176 DOI: 10.1039/c9sc02598g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 09/11/2019] [Indexed: 12/18/2022] Open
Abstract
Chemically modified nucleic acids have long served as a very important class of bio-hybrid structures. In particular, the modification with PEG has advanced the scope and performance of oligonucleotides in materials science, catalysis and therapeutics. Most of the applications involving pristine or modified DNA rely on the potential of DNA to form a double-stranded structure. However, a substantial requirement for metal-cations to achieve hybridization has restricted the range of applications. To extend the applicability of DNA in salt-free or low ionic strength aqueous medium, we introduce noncovalent DNA-PEG constructs that allow canonical base-pairing between individually PEGylated complementary strands resulting in a double-stranded structure in salt-free aqueous medium. This method relies on grafting of amino-terminated PEG polymers electrostatically onto the backbone of DNA, which results in the formation of a PEG-envelope. The specific charge interaction of PEG molecules with DNA, absolute absence of metal ions within the PEGylated DNA molecules and formation of a double helix that is significantly more stable than the duplex in an ionic buffer have been unequivocally demonstrated using multiple independent characterization techniques.
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Affiliation(s)
- Gurudas Chakraborty
- Zernike Institute for Advanced Materials , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands .
- DWI-Leibniz Institute for Interactive Materials , Forckenbeckstraße 50 , 52056 Aachen , Germany
| | - Konstantin Balinin
- Zernike Institute for Advanced Materials , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands .
- DWI-Leibniz Institute for Interactive Materials , Forckenbeckstraße 50 , 52056 Aachen , Germany
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Giuseppe Portale
- Zernike Institute for Advanced Materials , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands .
| | - Mark Loznik
- Zernike Institute for Advanced Materials , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands .
- DWI-Leibniz Institute for Interactive Materials , Forckenbeckstraße 50 , 52056 Aachen , Germany
| | - Evgeny Polushkin
- Zernike Institute for Advanced Materials , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands .
| | - Tanja Weil
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Andreas Herrmann
- Zernike Institute for Advanced Materials , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands .
- DWI-Leibniz Institute for Interactive Materials , Forckenbeckstraße 50 , 52056 Aachen , Germany
- Institute of Technical and Macromolecular Chemistry , RWTH Aachen University , Worringerweg 2 , 52074 Aachen , Germany
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55
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Nieto-Sepulveda E, Bage AD, Evans LA, Hunt TA, Leach AG, Thomas SP, Lloyd-Jones GC. Kinetics and Mechanism of the Arase-Hoshi R2BH-Catalyzed Alkyne Hydroboration: Alkenylboronate Generation via B–H/C–B Metathesis. J Am Chem Soc 2019; 141:18600-18611. [DOI: 10.1021/jacs.9b10114] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Eduardo Nieto-Sepulveda
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Andrew D. Bage
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Louise A. Evans
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Thomas A. Hunt
- Medicinal Chemistry, Oncology R&D, AstraZeneca, Cambridge, CB4 0WG, United Kingdom
| | - Andrew G. Leach
- School of Health Sciences, Stopford Building, The University of Manchester, Oxford Road, Manchester M13 9PT, United Kingdom
| | - Stephen P. Thomas
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Guy C. Lloyd-Jones
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
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56
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Sun X, Zhu Q, Xie Z, Su W, Zhu J, Zhu C. An Unprecedented Ga/P Frustrated Lewis Pair: Synthesis, Characterization, and Reactivity. Chemistry 2019; 25:14295-14299. [DOI: 10.1002/chem.201904081] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Xiong Sun
- State Key Laboratory of Coordination ChemistryJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 P. R. China
| | - Qin Zhu
- State Key Laboratory of Coordination ChemistryJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 P. R. China
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), andDepartment of ChemistryCollege of Chemistry, and Chemical EngineeringXiamen University Xiamen 361005 P. R. China
| | - Zhuoyi Xie
- State Key Laboratory of Coordination ChemistryJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 P. R. China
| | - Wei Su
- State Key Laboratory of Coordination ChemistryJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 P. R. China
| | - Jun Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), andDepartment of ChemistryCollege of Chemistry, and Chemical EngineeringXiamen University Xiamen 361005 P. R. China
| | - Congqing Zhu
- State Key Laboratory of Coordination ChemistryJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 P. R. China
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57
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Bastidas JRM, Oleskey TJ, Miller SL, Smith MR, Maleczka RE. Para-Selective, Iridium-Catalyzed C-H Borylations of Sulfated Phenols, Benzyl Alcohols, and Anilines Directed by Ion-Pair Electrostatic Interactions. J Am Chem Soc 2019; 141:15483-15487. [PMID: 31525037 PMCID: PMC9851420 DOI: 10.1021/jacs.9b08464] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Para C-H borylations (CHB) of tetraalkylammonium sulfates and sulfamates have been achieved using bipyridine-ligated Ir boryl catalysts. Selectivities can be modulated by both the length of the alkyl groups in the tetraalkylammonium cations and the substituents on the bipyridine ligands. Ion pairing, where the alkyl groups of the cation shield the meta C-H bonds in the counteranions, is proposed to account for para selectivity. The 4,4'-dimethoxy-2,2'-bipyridine ligand gave superior selectivities.
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58
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Tagne Kuate AC, Lalancette RA, Bannenberg T, Tamm M, Jäkle F. Diferrocenylmercury diphosphine diastereomers with unique geometries: trans-chelation at Pd(ii) with short Hg(ii)Pd(ii) contacts. Dalton Trans 2019; 48:13430-13439. [PMID: 31441475 DOI: 10.1039/c9dt02728a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Diphosphine chelate ligands are essential in many catalytic processes with both the electronic structure and bite angle having a dramatic influence on the coordination behavior and catalytic performance. The synthesis of a new class of diferrocenylmercury-supported diphosphine chelate ligands was accomplished by the reaction of (ortho-diphenylphosphino)ferrocenyl sulfinate (2) with t-BuLi, followed by treatment with mercury(ii) chloride. Two diastereomers, 4a (pSpR-, meso-isomer) and 4b (pSpS-isomer), differ in the orientation of the ferrocene moiety relative to the central Ph2PC5H3-Hg-C5H3PPh2 bridging entity. They were isolated independently and fully characterized in solution and in the solid state by single crystal X-ray diffraction analysis. Key characteristics of these ligands are their exceptionally wide and flexible bite angles and the unique stereochemical environment that is achieved upon coordination to transition metals. Complexation to Pd(ii)Cl2 gives rise to unusual square-planar trans-chelate complexes 5a (meso) and 5b (pSpS). In competition reactions, 4a and 4b show similar reactivity toward Pd(ii)Cl2. The molecular structures of 5a and 5b exhibit short PdHg contacts, possibly indicating secondary metallophilic interactions as further evidenced by bond-critical points between Pd and Hg that were identified by AIM analyses.
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Affiliation(s)
- Alain C Tagne Kuate
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ 07102, USA. and Department of Chemistry, Faculty of Sciences, University of Dschang, P.O. Box 67, Dschang, Cameroon
| | - Roger A Lalancette
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ 07102, USA.
| | - Thomas Bannenberg
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Frieder Jäkle
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ 07102, USA.
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59
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Caise A, Kolychev EL, Hicks J, Fuentes MÁ, Goicoechea JM, Aldridge S. Reversible borohydride formation from aluminium hydrides and {H(9-BBN)} 2: structural, thermodynamic and reactivity studies. Dalton Trans 2019; 48:10845-10852. [PMID: 30848267 DOI: 10.1039/c9dt00535h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A series of novel β-diketiminate stabilised aluminium borohydrides of the type (Nacnac)Al(R){H2(9-BBN)} has been synthesised offering variation in both the auxiliary R substituent and in the Nacnac backbone itself. A number of these complexes show unusual dissociation of the borane from the aluminium hydride in solution under ambient conditions. The lability of the borane is shown (by variable temperature NMR analyses) to be influenced by the electronic character of both the aluminium-bound R substituent and the Nacnac ligand itself, such that electron-withdrawing substituents lead to greater dissociation of the borane. Comparison of these complexes with related systems featuring the tetrahydroborate [BH4]- ligand illustrates the impact of the boron-bound substituents on the ability of the borane fragment to dissociate from the aluminium hydride. This dissociative behaviour is shown to be highly influential on the ability of the borohydride complexes to reduce carbon dioxide in a stoichiometric manner.
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Affiliation(s)
- Alexa Caise
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK.
| | - Eugene L Kolychev
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK.
| | - Jamie Hicks
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK.
| | - M Ángeles Fuentes
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK.
| | - Jose M Goicoechea
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK.
| | - Simon Aldridge
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK.
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60
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Aupic C, Abdou Mohamed A, Figliola C, Nava P, Tuccio B, Chouraqui G, Parrain JL, Chuzel O. Highly diastereoselective preparation of chiral NHC-boranes stereogenic at the boron atom. Chem Sci 2019; 10:6524-6530. [PMID: 31341605 PMCID: PMC6611065 DOI: 10.1039/c9sc01454c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 05/23/2019] [Indexed: 11/21/2022] Open
Abstract
Stereogenic main group elements are clearly generating interest in the enantioselective catalysis field. Surprisingly, while chiral organoboron reagents are very useful in stereoselective transformations, few scaffolds stereogenic at boron and configurationally stable have been reported to date. Herein, we describe an original library of chiral NHC-boranes, stereogenic at the boron atom, that has been prepared in only a few steps and in good yields (up to 93%). Key steps involve a chlorination/arylation sequence in the presence of simple Grignard reagents from bicyclic NHC-boranes. The high and unprecedented diastereoselectivity observed during the second step (up to 99 : 1 dr) has been rationalized through a plausible SRN1 mechanism thanks to EPR observations and DFT calculations.
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Affiliation(s)
- Clara Aupic
- Aix Marseille Univ , CNRS , Centrale Marseille, iSm2 , Marseille , France .
| | - Amel Abdou Mohamed
- Aix Marseille Univ , CNRS , Centrale Marseille, iSm2 , Marseille , France .
| | - Carlotta Figliola
- Aix Marseille Univ , CNRS , Centrale Marseille, iSm2 , Marseille , France .
| | - Paola Nava
- Aix Marseille Univ , CNRS , Centrale Marseille, iSm2 , Marseille , France .
| | | | - Gaëlle Chouraqui
- Aix Marseille Univ , CNRS , Centrale Marseille, iSm2 , Marseille , France .
| | - Jean-Luc Parrain
- Aix Marseille Univ , CNRS , Centrale Marseille, iSm2 , Marseille , France .
| | - Olivier Chuzel
- Aix Marseille Univ , CNRS , Centrale Marseille, iSm2 , Marseille , France .
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61
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Rochette É, Desrosiers V, Soltani Y, Fontaine FG. Isodesmic C–H Borylation: Perspectives and Proof of Concept of Transfer Borylation Catalysis. J Am Chem Soc 2019; 141:12305-12311. [DOI: 10.1021/jacs.9b04305] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Étienne Rochette
- Département de Chimie, Université Laval, 1045 Avenue de la Médecine, Québec City, Québec G1V 0A6, Canada
| | - Vincent Desrosiers
- Département de Chimie, Université Laval, 1045 Avenue de la Médecine, Québec City, Québec G1V 0A6, Canada
| | - Yashar Soltani
- Département de Chimie, Université Laval, 1045 Avenue de la Médecine, Québec City, Québec G1V 0A6, Canada
| | - Frédéric-Georges Fontaine
- Département de Chimie, Université Laval, 1045 Avenue de la Médecine, Québec City, Québec G1V 0A6, Canada
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62
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Roy MMD, Ferguson MJ, McDonald R, Zhou Y, Rivard E. A vinyl silylsilylene and its activation of strong homo- and heteroatomic bonds. Chem Sci 2019; 10:6476-6481. [PMID: 31341599 PMCID: PMC6610552 DOI: 10.1039/c9sc01192g] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Accepted: 05/23/2019] [Indexed: 12/20/2022] Open
Abstract
A facile route to an two-coordinate acyclic silylene that can activate strong homo- and heteroatomic bonds is reported.
The facile synthesis of a rare two-coordinate acyclic silylene (R2Si:) that is stabilized using a bulky vinylic N-heterocyclic olefin ligand and the strongly σ-donating hypersilyl group [Si(SiMe3)3]– is reported. This vinyl-substituted silylene exhibits an excellent combination of prolonged thermal stability along with high reactivity towards small molecules. Despite being stable for months in solution, the reactivity of this new silylene is manifest in its ambient temperature activation of strong B–H, Si–Cl, C–O, P–P and C–H bonds.
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Affiliation(s)
- Matthew M D Roy
- Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta , Canada T6G 2G2 .
| | - Michael J Ferguson
- Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta , Canada T6G 2G2 .
| | - Robert McDonald
- Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta , Canada T6G 2G2 .
| | - Yuqiao Zhou
- Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta , Canada T6G 2G2 .
| | - Eric Rivard
- Department of Chemistry , University of Alberta , 11227 Saskatchewan Drive , Edmonton , Alberta , Canada T6G 2G2 .
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63
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Li J, Daniliuc CG, Kehr G, Erker G. Preparation of the Borane (Fmes)BH 2 and its Utilization in the FLP Reduction of Carbon Monoxide and Carbon Dioxide. Angew Chem Int Ed Engl 2019; 58:6737-6741. [PMID: 30874361 DOI: 10.1002/anie.201901634] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Indexed: 01/07/2023]
Abstract
Treatment of 1,3,5-tris(trifluoromethyl)benzene with n-BuLi, followed by H3 B⋅SMe2 and subsequent hydride removal gave the (Fmes)BH2 reagent, which was isolated as a SMe2 stabilized monomer or a ligand free (μ-H)2 -bridged dimer. Reaction with Mes2 P(vinyl) gave the respective ethylene-bridged P/B(Fmes)H FLP. It reduced carbon monoxide to the formyl stage and carbon dioxide to the formaldehyde oxidation state. Most new compounds were characterized by X-ray diffraction.
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Affiliation(s)
- Jun Li
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstr. 40, 48149, Münster, Germany
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstr. 40, 48149, Münster, Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstr. 40, 48149, Münster, Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstr. 40, 48149, Münster, Germany
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64
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Li J, Daniliuc CG, Kehr G, Erker G. Preparation of the Borane (Fmes)BH
2
and its Utilization in the FLP Reduction of Carbon Monoxide and Carbon Dioxide. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901634] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Jun Li
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstr. 40 48149 Münster Germany
| | - Constantin G. Daniliuc
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstr. 40 48149 Münster Germany
| | - Gerald Kehr
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstr. 40 48149 Münster Germany
| | - Gerhard Erker
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstr. 40 48149 Münster Germany
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65
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Revisiting the reduction of indoles by hydroboranes: A combined experimental and computational study. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.02.048] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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66
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Mörsdorf JM, Wadepohl H, Ballmann J. A Tautomeric λ 3/λ 5-Phosphane Pair and Its Ambiphilic Reactivity. Inorg Chem 2019; 58:3502-3508. [PMID: 30777436 DOI: 10.1021/acs.inorgchem.9b00076] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The central phosphorus atom of a novel hydroxyl-functionalized triarylphosphane was shown to reversibly insert into one of the molecule's O-H bonds, which forms the basis for a tautomeric λ3/λ5-phosphane equilibrium. For the first time, this equilibrium was detected for a λ3-triarylphosphane and the underlying dynamic process was elucidated by NMR spectroscopy. On the basis of reactivity studies, a nucleophilic character was assigned to the minor species present in solution, the λ3-phosphane. Upon methylation, for example, the λ3-form was selectively removed from the equilibrium and converted to the corresponding phosphonium salt. However, upon generation of an alkoxide via proton abstraction, the electrophilic character of the λ5-phosphane in the equilibrium became evident since the alkoxide was found to attack the molecule's phosphorus atom. This intramolecular reaction led to the selective formation of a new anionic λ6-hydridospirophosphane.
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Affiliation(s)
- Jean-Marc Mörsdorf
- Anorganisch-Chemisches Institut , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 276 , 69120 Heidelberg , Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 276 , 69120 Heidelberg , Germany
| | - Joachim Ballmann
- Anorganisch-Chemisches Institut , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 276 , 69120 Heidelberg , Germany
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67
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Wright SE, Richardson‐Solorzano S, Stewart TN, Miller CD, Morris KC, Daley CJA, Clark TB. Accessing Ambiphilic Phosphine Boronates through C−H Borylation by an Unforeseen Cationic Iridium Complex. Angew Chem Int Ed Engl 2019; 58:2834-2838. [DOI: 10.1002/anie.201812857] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Shawn E. Wright
- Department of Chemistry & BiochemistryUniversity of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | | | - Tiffany N. Stewart
- Department of Chemistry & BiochemistryUniversity of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Christopher D. Miller
- Department of Chemistry & BiochemistryUniversity of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Kelsey C. Morris
- Department of Chemistry & BiochemistryUniversity of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Christopher J. A. Daley
- Department of Chemistry & BiochemistryUniversity of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Timothy B. Clark
- Department of Chemistry & BiochemistryUniversity of San Diego 5998 Alcalá Park San Diego CA 92110 USA
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68
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Aman M, Dostál L, Růžičková Z, Mebs S, Beckmann J, Jambor R. Ambiguous Role of N → Sn Coordinated Stannylene: Lewis Base or Acid? Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00816] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Michal Aman
- Department of General and Inorganic Chemistry, University of Pardubice, 53210 Pardubice, Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry, University of Pardubice, 53210 Pardubice, Czech Republic
| | - Zdenka Růžičková
- Department of General and Inorganic Chemistry, University of Pardubice, 53210 Pardubice, Czech Republic
| | - Stefan Mebs
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Roman Jambor
- Department of General and Inorganic Chemistry, University of Pardubice, 53210 Pardubice, Czech Republic
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69
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John A, Kirschner S, Fengel MK, Bolte M, Lerner HW, Wagner M. Simultaneous expansion of 9,10 boron-doped anthracene in longitudinal and lateral directions. Dalton Trans 2019; 48:1871-1877. [PMID: 30608493 DOI: 10.1039/c8dt04820g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Doubly boron-doped anthracenes and pentacenes have been longitudinally and laterally expanded through annulation of thiophene or benzene rings. The obtained series of closely related compounds allowed an assessment of key structure-property relationships with a focus on optoelectronic characteristics. Most of the products are benchtop-stable blue emitters and capable of accepting two electrons in a reversible manner. The syntheses involved late-stage modifications through photocyclization or stepwise oxidative C-C coupling (DDQ/BF3·Et2O) as well as cyclocondensation of ortho-disilylated or -diborylated aryl building blocks.
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Affiliation(s)
- Alexandra John
- Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue Strasse 7, 60438 Frankfurt am Main, Germany.
| | - Sven Kirschner
- Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue Strasse 7, 60438 Frankfurt am Main, Germany.
| | - Melina K Fengel
- Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue Strasse 7, 60438 Frankfurt am Main, Germany.
| | - Michael Bolte
- Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue Strasse 7, 60438 Frankfurt am Main, Germany.
| | - Hans-Wolfram Lerner
- Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue Strasse 7, 60438 Frankfurt am Main, Germany.
| | - Matthias Wagner
- Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue Strasse 7, 60438 Frankfurt am Main, Germany.
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70
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71
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Wright SE, Richardson‐Solorzano S, Stewart TN, Miller CD, Morris KC, Daley CJA, Clark TB. Accessing Ambiphilic Phosphine Boronates through C−H Borylation by an Unforeseen Cationic Iridium Complex. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812857] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Shawn E. Wright
- Department of Chemistry & Biochemistry University of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | | | - Tiffany N. Stewart
- Department of Chemistry & Biochemistry University of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Christopher D. Miller
- Department of Chemistry & Biochemistry University of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Kelsey C. Morris
- Department of Chemistry & Biochemistry University of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Christopher J. A. Daley
- Department of Chemistry & Biochemistry University of San Diego 5998 Alcalá Park San Diego CA 92110 USA
| | - Timothy B. Clark
- Department of Chemistry & Biochemistry University of San Diego 5998 Alcalá Park San Diego CA 92110 USA
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72
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Zhao Q, Dewhurst RD, Braunschweig H, Chen X. Boranchemie aus einer neuen Perspektive: Nukleophilie der B-H-Bindungselektronen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201809733] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Qianyi Zhao
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials; School of Chemistry and Chemical Engineering; Henan Normal University; 46 E. Jianshe Rd. Xinxiang Henan 453007 China
| | - Rian D. Dewhurst
- Institut für Anorganische Chemie und Institut für nachhaltige Chemie und Katalyse mit Bor; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Deutschland
| | - Holger Braunschweig
- Institut für Anorganische Chemie und Institut für nachhaltige Chemie und Katalyse mit Bor; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Deutschland
| | - Xuenian Chen
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials; School of Chemistry and Chemical Engineering; Henan Normal University; 46 E. Jianshe Rd. Xinxiang Henan 453007 China
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou Henan 450001 China
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73
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Zhao Q, Dewhurst RD, Braunschweig H, Chen X. A New Perspective on Borane Chemistry: The Nucleophilicity of the B−H Bonding Pair Electrons. Angew Chem Int Ed Engl 2019; 58:3268-3278. [DOI: 10.1002/anie.201809733] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 10/22/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Qianyi Zhao
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials; School of Chemistry and Chemical Engineering; Henan Normal University; 46 E. Jianshe Rd. Xinxiang Henan 453007 China
| | - Rian D. Dewhurst
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Xuenian Chen
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials; School of Chemistry and Chemical Engineering; Henan Normal University; 46 E. Jianshe Rd. Xinxiang Henan 453007 China
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou Henan 450001 China
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74
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Abstract
The study of main-group molecules that behave and react similarly to transition-metal (TM) complexes has attracted significant interest in recent decades. Most notably, the attractive idea of replacing the all-too-often rare and costly metals from catalysis has motivated efforts to develop main-group-element-mediated reactions. Main-group elements, however, lack the electronic flexibility of TM complexes that arises from combinations of empty and filled d orbitals and that seem ideally suited to bind and activate many substrates. In this review, we look at boron, an element that despite its nonmetal nature, low atomic weight, and relative redox staticity has achieved great milestones in terms of TM-like reactivity. We show how in interelement cooperative systems, diboron molecules, and hypovalent complexes the fifth element can acquire a truly metallomimetic character. As we discuss, this character is powerfully demonstrated by the reactivity of boron-based molecules with H2, CO, alkynes, alkenes and even with N2.
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75
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Lerayer E, Renaut P, Roger J, Pirio N, Cattey H, Fleurat-Lessard P, Boudjelel M, Massou S, Bouhadir G, Bourissou D, Hierso JC. A sterically congested 1,2-diphosphino-1′-boryl-ferrocene: synthesis, characterization and coordination to platinum. Dalton Trans 2019; 48:11191-11195. [DOI: 10.1039/c9dt01921a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A unique tritopic (P, P, B)-ferrocene ambiphile with antagonist functions directly attached to a metallocene backbone is described.
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76
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Bouchard N, Fontaine FG. Alkylammoniotrifluoroborate functionalized polystyrenes: polymeric pre-catalysts for the metal-free borylation of heteroarenes. Dalton Trans 2019; 48:4846-4856. [PMID: 30869102 DOI: 10.1039/c9dt00484j] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Three polymeric versions of ansa-N,N-dialkylammoniumtrifluoroborate ambiphilic molecules based on the styrene motif (poly(1-NMe2H+-2-BF3--4-styrene) (P-Me), poly(1-NEt2H+-2-BF3--4-styrene) (P-Et) and poly(1-piperidinyl-H+-2-BF3--4-styrene) (P-Pip)) were synthesized, characterized and tested as heterogeneous pre-catalysts for the borylation of electron-rich heteroarenes. These heterogeneous versions of previously reported pre-catalysts show similar reactivity patterns and represent the first examples of solid-supported FLP metal-free catalysts for the C-H borylation of heteroarenes.
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Affiliation(s)
- Nicolas Bouchard
- Département de Chimie, Centre de de Catalyse et Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec, CanadaG1V 0A6. frederic.fontaine.@chm.ulaval.ca
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77
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Lorenzini F, Lagueux-Tremblay PL, Kayser LV, Anderson E, Arndtsen BA. Synthesis, structure and palladium coordination of ambiphilic, pyridine- and phosphine-tethered N-boryl imine ligands. Dalton Trans 2019; 48:5766-5772. [DOI: 10.1039/c8dt05100c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New classes of ambiphilic ligands incorporating N-boryl imines can be generated in two steps from aldehydes, and their structure modulated by the ligand motif.
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78
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Selective CO2
Splitting by Doubly Reduced Aryl Boranes to Give CO and [CO3
]2−. Angew Chem Int Ed Engl 2018; 57:16491-16495. [DOI: 10.1002/anie.201811135] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Indexed: 11/07/2022]
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79
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von Grotthuss E, Prey SE, Bolte M, Lerner HW, Wagner M. Selective CO2
Splitting by Doubly Reduced Aryl Boranes to Give CO and [CO3
]2−. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201811135] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Esther von Grotthuss
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt (Main) Germany
| | - Sven E. Prey
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt (Main) Germany
| | - Michael Bolte
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt (Main) Germany
| | - Hans-Wolfram Lerner
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt (Main) Germany
| | - Matthias Wagner
- Institut für Anorganische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Strasse 7 60438 Frankfurt (Main) Germany
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80
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Catalyst‐Free Hydroboration of CO
2
With a Nucleophilic Diborane(4). Chemistry 2018; 24:16983-16986. [DOI: 10.1002/chem.201804612] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Indexed: 11/07/2022]
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81
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Jayaraman A, Misal Castro LC, Fontaine FG. Practical and Scalable Synthesis of Borylated Heterocycles Using Bench-Stable Precursors of Metal-Free Lewis Pair Catalysts. Org Process Res Dev 2018. [DOI: 10.1021/acs.oprd.8b00248] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Arumugam Jayaraman
- Département de Chimie, Centre de Catalyse et de Chimie Verte (C3V), Université Laval, Quebec City, Québec, Canada G1V 0A6
| | - Luis C. Misal Castro
- Département de Chimie, Centre de Catalyse et de Chimie Verte (C3V), Université Laval, Quebec City, Québec, Canada G1V 0A6
| | - Frédéric-Georges Fontaine
- Département de Chimie, Centre de Catalyse et de Chimie Verte (C3V), Université Laval, Quebec City, Québec, Canada G1V 0A6
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82
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Nichols BR, Akhmedov NG, Petersen JL, Popp BV. Access to a pair of ambiphilic phosphine-borane regioisomers by rhodium-catalyzed hydroboration. Dalton Trans 2018; 47:8456-8465. [PMID: 29901042 DOI: 10.1039/c8dt01467a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lewis basic substrates, such as vinylphosphines and enamines, can be problematic for transition-metal catalysed hydrofunctionalization reactions due to their propensity to ligate and deactivate transition-metal catalysts as well as form direct Lewis adducts with reaction partners. While exploring rhodium-catalyzed hydroboration of diphenylvinylphosphine with pinacolborane, we found that a high degree of regiocontrol could be achieved without the need to diminish the Lewis basicity of the phosphine by oxidation or prior-protection. At slightly elevated temperature, a high yield of the previously unreported branched regioisomer, 1-pinacolatoborono-1-diphenylphosphinoethane, was achieved with regioselectivity greater than 10 : 1 using [Rh(COD)Cl]2 as the catalyst and AgOTf as a catalytic additive. Inversion of regioselectivity occurred at low temperature and high yield of the linear regioisomer was observed. Subsequent functionalization of the new branched phosphine-boronic ester and its coordination to rhodium were also investigated.
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Affiliation(s)
- Brian R Nichols
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26505, USA.
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83
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Tagne Kuate AC, Lalancette RA, Bannenberg T, Jäkle F. Diferrocenylmercury‐Bridged Diphosphine: A Chiral, Ambiphilic, and Redox‐Active Bidentate Ligand. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alain C. Tagne Kuate
- Department of Chemistry Rutgers University—Newark 73 Warren Street Newark NJ 07102 USA
- Department of Chemistry Faculty of Science University of Dschang P.O. Box 67 Dschang Cameroon
| | - Roger A. Lalancette
- Department of Chemistry Rutgers University—Newark 73 Warren Street Newark NJ 07102 USA
| | - Thomas Bannenberg
- Institut für Anorganische und Analytische Chemie Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Frieder Jäkle
- Department of Chemistry Rutgers University—Newark 73 Warren Street Newark NJ 07102 USA
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84
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Mellerup SK, Li C, Radtke J, Wang X, Li QS, Wang S. Photochemical Generation of Chiral N,B,X-Heterocycles by Heteroaromatic C−X Bond Scission (X=S, O) and Boron Insertion. Angew Chem Int Ed Engl 2018; 57:9634-9639. [PMID: 29682875 DOI: 10.1002/anie.201803760] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Indexed: 02/04/2023]
Affiliation(s)
- Soren K. Mellerup
- Department of Chemistry; Queen's University; Kingston Ontario K7L 3N6 Canada
| | - Cally Li
- Department of Chemistry; Queen's University; Kingston Ontario K7L 3N6 Canada
| | - Julian Radtke
- Institut für Anorganische und Analytische Chemie; Goethe-Universität Frankfurt; 60438 Frankfurt (Main) Germany
| | - Xiang Wang
- Department of Chemistry; Queen's University; Kingston Ontario K7L 3N6 Canada
| | - Quan-Song Li
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials; School of Chemistry; Beijing Institute of Technology; Beijing 10081 P. R. China
| | - Suning Wang
- Department of Chemistry; Queen's University; Kingston Ontario K7L 3N6 Canada
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials; School of Chemistry; Beijing Institute of Technology; Beijing 10081 P. R. China
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85
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Mellerup SK, Li C, Radtke J, Wang X, Li QS, Wang S. Photochemical Generation of Chiral N,B,X-Heterocycles by Heteroaromatic C−X Bond Scission (X=S, O) and Boron Insertion. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803760] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Soren K. Mellerup
- Department of Chemistry; Queen's University; Kingston Ontario K7L 3N6 Canada
| | - Cally Li
- Department of Chemistry; Queen's University; Kingston Ontario K7L 3N6 Canada
| | - Julian Radtke
- Institut für Anorganische und Analytische Chemie; Goethe-Universität Frankfurt; 60438 Frankfurt (Main) Germany
| | - Xiang Wang
- Department of Chemistry; Queen's University; Kingston Ontario K7L 3N6 Canada
| | - Quan-Song Li
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials; School of Chemistry; Beijing Institute of Technology; Beijing 10081 P. R. China
| | - Suning Wang
- Department of Chemistry; Queen's University; Kingston Ontario K7L 3N6 Canada
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials; School of Chemistry; Beijing Institute of Technology; Beijing 10081 P. R. China
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86
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Li Y, Song L, Wang B, He J, Li Y, Deng Z, Mao C. Universal pH‐Responsive and Metal‐Ion‐Free Self‐Assembly of DNA Nanostructures. Angew Chem Int Ed Engl 2018; 57:6892-6895. [DOI: 10.1002/anie.201804054] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Yongfei Li
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology Hefei Anhui 230009 China
| | - Lei Song
- CAS Key Laboratory of Soft Matter Chemistry Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Bang Wang
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology Hefei Anhui 230009 China
| | - Jianbo He
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology Hefei Anhui 230009 China
| | - Yulin Li
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology Hefei Anhui 230009 China
| | - Zhaoxiang Deng
- CAS Key Laboratory of Soft Matter Chemistry Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Chengde Mao
- Department of Chemistry Purdue University West Lafayette IN 47907 USA
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87
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Li Y, Song L, Wang B, He J, Li Y, Deng Z, Mao C. Universal pH‐Responsive and Metal‐Ion‐Free Self‐Assembly of DNA Nanostructures. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804054] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yongfei Li
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology Hefei Anhui 230009 China
| | - Lei Song
- CAS Key Laboratory of Soft Matter Chemistry Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Bang Wang
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology Hefei Anhui 230009 China
| | - Jianbo He
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology Hefei Anhui 230009 China
| | - Yulin Li
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology Hefei Anhui 230009 China
| | - Zhaoxiang Deng
- CAS Key Laboratory of Soft Matter Chemistry Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Chengde Mao
- Department of Chemistry Purdue University West Lafayette IN 47907 USA
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88
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Jayaraman A, Misal Castro LC, Desrosiers V, Fontaine FG. Metal-free borylative dearomatization of indoles: exploring the divergent reactivity of aminoborane C-H borylation catalysts. Chem Sci 2018; 9:5057-5063. [PMID: 29938036 PMCID: PMC5994747 DOI: 10.1039/c8sc01093e] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 05/05/2018] [Indexed: 11/25/2022] Open
Abstract
We report the first example of catalytic dearomatization of indoles to generate 3-borylindolines using metal-free borane catalysts.
While the dearomatization of indoles by carbon–boron bond forming reactions is new and quite promising, they are so far mainly metal-catalyzed. Here, we establish the use of metal-free catalysts in promoting such reactions in an atom-efficient way. The in situ generated ambiphilic aminoborane catalyst (1-Pip-2-BH2-C6H4)2 (Pip = piperidyl) promotes borylative dearomatization of various 1-arylsulfonyl indoles with pinacolborane in a syn addition fashion, with H and Bpin groups added respectively to the 2 and 3 positions of indoles. Catalysis proceeds with good to excellent conversion and essentially with complete regio- and diastereoselectivity. From mechanistic insights and DFT computations, we realized and established that prototypical boranes can also catalyze this borylative dearomatization.
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Affiliation(s)
- Arumugam Jayaraman
- Département de Chimie , Centre de Catalyse et de Chimie Verte (C3V) , Université Laval , Québec City , Québec , Canada G1V 0A6 .
| | - Luis C Misal Castro
- Département de Chimie , Centre de Catalyse et de Chimie Verte (C3V) , Université Laval , Québec City , Québec , Canada G1V 0A6 .
| | - Vincent Desrosiers
- Département de Chimie , Centre de Catalyse et de Chimie Verte (C3V) , Université Laval , Québec City , Québec , Canada G1V 0A6 .
| | - Frédéric-Georges Fontaine
- Département de Chimie , Centre de Catalyse et de Chimie Verte (C3V) , Université Laval , Québec City , Québec , Canada G1V 0A6 .
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89
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Tagne Kuate AC, Lalancette RA, Bannenberg T, Jäkle F. Diferrocenylmercury‐Bridged Diphosphine: A Chiral, Ambiphilic, and Redox‐Active Bidentate Ligand. Angew Chem Int Ed Engl 2018; 57:6552-6557. [DOI: 10.1002/anie.201803086] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Indexed: 11/05/2022]
Affiliation(s)
- Alain C. Tagne Kuate
- Department of Chemistry Rutgers University—Newark 73 Warren Street Newark NJ 07102 USA
- Department of Chemistry Faculty of Science University of Dschang P.O. Box 67 Dschang Cameroon
| | - Roger A. Lalancette
- Department of Chemistry Rutgers University—Newark 73 Warren Street Newark NJ 07102 USA
| | - Thomas Bannenberg
- Institut für Anorganische und Analytische Chemie Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Frieder Jäkle
- Department of Chemistry Rutgers University—Newark 73 Warren Street Newark NJ 07102 USA
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90
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Liu Z, Guo J, Lu Y, Hu W, Dang Y, Wang ZX. A strategy for developing metal-free hydrogenation catalysts: a DFT proof-of-principle study. Dalton Trans 2018; 47:7709-7714. [DOI: 10.1039/c8dt01619d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using DFT computations, a metal-free strategy has been formulated to activate hydrogen reversibly and to construct hydrogenation catalysts, calling for experimental realizations.
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Affiliation(s)
- Zheyuan Liu
- School of Chemical Sciences
- University of the Chinese Academy of Sciences
- Beijing 100049
- China
- Department of Chemistry
| | - Jiandong Guo
- School of Chemical Sciences
- University of the Chinese Academy of Sciences
- Beijing 100049
- China
| | - Yu Lu
- School of Chemical Sciences
- University of the Chinese Academy of Sciences
- Beijing 100049
- China
| | - Wenping Hu
- Department of Chemistry
- School of Science
- Tianjin University
- Tianjin 300072
- China
| | - Yanfeng Dang
- Department of Chemistry
- School of Science
- Tianjin University
- Tianjin 300072
- China
| | - Zhi-Xiang Wang
- School of Chemical Sciences
- University of the Chinese Academy of Sciences
- Beijing 100049
- China
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