1
|
Guo Y, Lian X, Zhang H, Zhang X, Chen J, Chen C, Lan X, Shao Y. Systematic Assessment of the Catalytic Reactivity of Frustrated Lewis Pairs in C-H Bond Activation. Molecules 2023; 29:24. [PMID: 38202607 PMCID: PMC10780200 DOI: 10.3390/molecules29010024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 12/15/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024] Open
Abstract
Unreactive C-H bond activation is a new horizon for frustrated Lewis pair (FLP) chemistry. This study provides a systematic assessment of the catalytic reactivity of recently reported intra-molecular FLPs on the activation of typical inert C-H bonds, including 1-methylpyrrole, methane, benzyl, propylene, and benzene, in terms of density functional theory (DFT) calculations. The reactivity of FLPs is evaluated according to the calculated reaction thermodynamic and energy barriers of C-H bond activation processes in the framework of concerted C-H activation mechanisms. As for 1-methylpyrrole, 14 types of N-B-based and 15 types of P-B-based FLPs are proposed to be active. Although none of the evaluated FLPs are able to catalyze the C-H activation of methane, benzyl, or propylene, four types of N-B-based FLPs are suggested to be capable of catalyzing the activation of benzene. Moreover, the influence of the strength of Lewis acid (LA) and Lewis base (LB), and the differences between the influences of LA and LB on the catalytic reactivity of FLPs, are also discussed briefly. This systematic assessment of the catalytic activity of FLPs should provide valuable guidelines to aid the development of efficient FLP-based metal-free catalysts for C-H bond activation.
Collapse
Affiliation(s)
- Yongjie Guo
- Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application, School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423000, China; (Y.G.); (H.Z.); (J.C.); (C.C.)
| | - Xueqi Lian
- Key Laboratory of Electronic Functional Materials and Devices of Guangdong Province, School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China; (X.L.); (X.Z.)
| | - Hao Zhang
- Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application, School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423000, China; (Y.G.); (H.Z.); (J.C.); (C.C.)
| | - Xueling Zhang
- Key Laboratory of Electronic Functional Materials and Devices of Guangdong Province, School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China; (X.L.); (X.Z.)
| | - Jun Chen
- Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application, School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423000, China; (Y.G.); (H.Z.); (J.C.); (C.C.)
| | - Changzhong Chen
- Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application, School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423000, China; (Y.G.); (H.Z.); (J.C.); (C.C.)
| | - Xiaobing Lan
- Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application, School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423000, China; (Y.G.); (H.Z.); (J.C.); (C.C.)
| | - Youxiang Shao
- Key Laboratory of Electronic Functional Materials and Devices of Guangdong Province, School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China; (X.L.); (X.Z.)
| |
Collapse
|
2
|
Roy MMD, Omaña AA, Wilson ASS, Hill MS, Aldridge S, Rivard E. Molecular Main Group Metal Hydrides. Chem Rev 2021; 121:12784-12965. [PMID: 34450005 DOI: 10.1021/acs.chemrev.1c00278] [Citation(s) in RCA: 132] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
This review serves to document advances in the synthesis, versatile bonding, and reactivity of molecular main group metal hydrides within Groups 1, 2, and 12-16. Particular attention will be given to the emerging use of said hydrides in the rapidly expanding field of Main Group element-mediated catalysis. While this review is comprehensive in nature, focus will be given to research appearing in the open literature since 2001.
Collapse
Affiliation(s)
- Matthew M D Roy
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Alvaro A Omaña
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
| | - Andrew S S Wilson
- Department of Chemistry, University of Bath, Avon BA2 7AY, United Kingdom
| | - Michael S Hill
- Department of Chemistry, University of Bath, Avon BA2 7AY, United Kingdom
| | - Simon Aldridge
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Eric Rivard
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
| |
Collapse
|
3
|
Chan YC, Bai Y, Chen WC, Chen HY, Li CY, Wu YY, Tseng MC, Yap GPA, Zhao L, Chen HY, Ong TG. Synergistic Catalysis by Brønsted Acid/Carbodicarbene Mimicking Frustrated Lewis Pair-Like Reactivity. Angew Chem Int Ed Engl 2021; 60:19949-19956. [PMID: 34128303 DOI: 10.1002/anie.202107127] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Indexed: 01/06/2023]
Abstract
Carbodicarbene (CDC), unique carbenic entities bearing two lone pairs of electrons are well-known for their strong Lewis basicity. We demonstrate herein, upon introducing a weak Brønsted acid benzyl alcohol (BnOH) as a co-modulator, CDC is remolded into a Frustrated Lewis Pair (FLP)-like reactivity. DFT calculation and experimental evidence show BnOH loosely interacting with the binding pocket of CDC via H-bonding and π-π stacking. Four distinct reactions in nature were deployed to demonstrate the viability of proof-of-concept as synergistic FLP/Modulator (CDC/BnOH), demonstrating enhanced catalytic reactivity in cyclotrimerization of isocyanate, polymerization process for L-lactide (LA), methyl methacrylate (MMA) and dehydrosilylation of alcohols. Importantly, the catalytic reactivity of carbodicarbene is uniquely distinct from conventional NHC which relies on only single chemical feature of nucleophilicity. This finding also provides a new spin in diversifying FLP reactivity with co-modulator or co-catalyst.
Collapse
Affiliation(s)
- Yi-Chen Chan
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, R.O.C.,Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu, Taiwan, R.O.C.,Taiwan International Graduate Program (TIGP), Sustainable Chemical Science and Technology (SCST), Academia Sinica, Taipei, Taiwan, R.O.C
| | - Yuna Bai
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, China
| | - Wen-Ching Chen
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, R.O.C
| | - Hsing-Yin Chen
- Department of Medicinal and Applied Chemistry, Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan, R.O.C
| | - Chen-Yu Li
- Department of Medicinal and Applied Chemistry, Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan, R.O.C
| | - Ying-Yann Wu
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, R.O.C
| | - Mei-Chun Tseng
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, R.O.C
| | - Glenn P A Yap
- The Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, USA
| | - Lili Zhao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, China
| | - Hsuan-Ying Chen
- Department of Medicinal and Applied Chemistry, Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan, R.O.C.,Department of Medicinal Research, Kaohsiung Medical University Hospital, Kaohsiung, 80708, Taiwan, R.O.C
| | - Tiow-Gan Ong
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, R.O.C.,Department of Chemistry, National (Taiwan) University, Taipei, Taiwan, R.O.C
| |
Collapse
|
4
|
Chan Y, Bai Y, Chen W, Chen H, Li C, Wu Y, Tseng M, Yap GPA, Zhao L, Chen H, Ong T. Synergistic Catalysis by Brønsted Acid/Carbodicarbene Mimicking Frustrated Lewis Pair‐Like Reactivity. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107127] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yi‐Chen Chan
- Institute of Chemistry Academia Sinica Taipei Taiwan, R.O.C
- Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu Taiwan, R.O.C
- Taiwan International Graduate Program (TIGP) Sustainable Chemical Science and Technology (SCST) Academia Sinica Taipei Taiwan, R.O.C
| | - Yuna Bai
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University Nanjing China
| | - Wen‐Ching Chen
- Institute of Chemistry Academia Sinica Taipei Taiwan, R.O.C
| | - Hsing‐Yin Chen
- Department of Medicinal and Applied Chemistry Drug Development and Value Creation Research Center Kaohsiung Medical University Kaohsiung 80708 Taiwan, R.O.C
| | - Chen‐Yu Li
- Department of Medicinal and Applied Chemistry Drug Development and Value Creation Research Center Kaohsiung Medical University Kaohsiung 80708 Taiwan, R.O.C
| | - Ying‐Yann Wu
- Institute of Chemistry Academia Sinica Taipei Taiwan, R.O.C
| | - Mei‐Chun Tseng
- Institute of Chemistry Academia Sinica Taipei Taiwan, R.O.C
| | - Glenn P. A. Yap
- The Department of Chemistry and Biochemistry University of Delaware Newark DE USA
| | - Lili Zhao
- Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University Nanjing China
| | - Hsuan‐Ying Chen
- Department of Medicinal and Applied Chemistry Drug Development and Value Creation Research Center Kaohsiung Medical University Kaohsiung 80708 Taiwan, R.O.C
- Department of Medicinal Research Kaohsiung Medical University Hospital Kaohsiung, 80708 Taiwan, R.O.C
| | - Tiow‐Gan Ong
- Institute of Chemistry Academia Sinica Taipei Taiwan, R.O.C
- Department of Chemistry National (Taiwan) University Taipei Taiwan, R.O.C
| |
Collapse
|
5
|
Kiernicki JJ, Zeller M, Szymczak NK. Requirements for Late-Stage Hydroboration of Pyridine N-Heterocyclic Carbene Iron(0) Complexes: The Role of Ancillary Ligands. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00307] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- John J. Kiernicki
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Matthias Zeller
- H. C. Brown Laboratory, Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Nathaniel K. Szymczak
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| |
Collapse
|
6
|
Sun Q, Daniliuc CG, Kehr G, Erker G. Reaction of carbon oxides with an ethylene-bridged PH/B Lewis pair. Dalton Trans 2021; 50:3523-3528. [PMID: 33599654 DOI: 10.1039/d1dt00459j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of 2,4,6-tri(tert-butyl)phenyl vinyl phosphane with Piers' borane [HB(C6F5)2] gave the ethylene-bridged PH/B frustrated Lewis pair (FLP) system. It is a monomer at high temperature (>323 K), but exists as an associated 12-membered macrocyclic trimer below 273 K. The PH/B FLP splits dihydrogen and serves as a metal-free hydrogenation catalyst. It adds carbon dioxide. It serves as a PH/B template for the reduction of carbon monoxide by the HB(C6F5)2 borane to the formyl stage. The resulting six membered P/B/O containing heterocycle is opened upon treatment with pyridine and it reacts with benzaldehyde in a boron mediated Claisen-Tishchenko reaction.
Collapse
Affiliation(s)
- Qiu Sun
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany.
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany.
| | - Gerald Kehr
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany.
| | - Gerhard Erker
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany.
| |
Collapse
|
7
|
Coffinet A, Zhang D, Vendier L, Bontemps S, Simonneau A. Borane-catalysed dinitrogen borylation by 1,3-B-H bond addition. Dalton Trans 2021; 50:5582-5589. [PMID: 33908973 DOI: 10.1039/d1dt00317h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The borylation of ligated dinitrogen by 1,3-B-H bond addition over a W-N[triple bond, length as m-dash]N unit using various hydroboranes has been examined. In a previous study, we have shown that Piers' borane (1) reacted with the tungsten dinitrogen complex 2 to afford a boryldiazenido-hydrido-tungsten species. The ease and mildness of this reaction have encouraged us to extend its scope, with the working hypothesis that 1 could potentially catalyse the 1,3-B-H bond addition of other hydroboranes. Under productive reaction conditions, dicyclohexylborane (HBCy2) and diisopinocampheylborane (HBIpc2) underwent retro-hydroboration to give cyclohexylborane (H2BCy) or isopinocampheylborane (H2BIpc), respectively; these monoalkylboranes act as N2-borylating agents in the presence of a catalytic amount of 1. Under similar conditions, 9-borabicyclononane (9-BBN) slowly adds over the W-N[triple bond, length as m-dash]N unit without rearrangement to a monoalkylborane. Catecholborane (HBcat) undergoes the 1,3-B-H bond addition without the need for a catalyst. We were not able to build more than one covalent B-N bond between the terminal N of the N2 ligand and the boron reagent with this methodology.
Collapse
Affiliation(s)
- Anaïs Coffinet
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, BP44099, F-31077 Toulouse cedex 4, France.
| | - Dan Zhang
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, BP44099, F-31077 Toulouse cedex 4, France.
| | - Laure Vendier
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, BP44099, F-31077 Toulouse cedex 4, France.
| | - Sébastien Bontemps
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, BP44099, F-31077 Toulouse cedex 4, France.
| | - Antoine Simonneau
- LCC-CNRS, Université de Toulouse, CNRS, UPS, 205 route de Narbonne, BP44099, F-31077 Toulouse cedex 4, France.
| |
Collapse
|
8
|
Dong S, Daniliuc CG, Kehr G, Erker G. Formation of Active Cyclic Five-membered Frustrated Phosphane/Borane Lewis Pairs and their Cycloaddition Reactions. Chemistry 2019; 26:745-753. [PMID: 31660668 DOI: 10.1002/chem.201904919] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Indexed: 12/14/2022]
Abstract
The cyclic five-membered frustrated phosphane/borane Lewis pairs 11 a, b featuring the bulky octaethylhydrindacenyl- (Eind) substituent or its mono-bromo derivative (Br Eind) at phosphorus are monomeric at room temperature. The reactive frustrated Lewis pairs (FLPs) cleave dihydrogen. The cyclic FLP 11 b (Br Eind) undergoes 1,2-P/B addition to ethylene to give the zwitterionic heteronorbornane derivative 14 b. It reacts similarly with the carbon-carbon double bond of norbornene. With a variety of organic π-reagents, the cyclic FLP 11 b often undergoes reaction sequences reminiscent of the Alder-Rickert reaction: the cycloaddition reaction is followed by rapid cycloreversion to form new five-membered heterocyclic FLP products with extrusion of ethene. Reactions of 11 b with benzaldehyde or with acetylenes follow this reaction pattern.
Collapse
Affiliation(s)
- Shunxi Dong
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany.,Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| |
Collapse
|
9
|
Uhl W, Martinewski K, Bruchhage JS, Hepp A, Layh M, Dielmann F, Mehlmann P. Cooperative activation of azides by an Al/N-based active Lewis pair – unexpected insertion of nitrogen atoms into C–Si bonds and formation of AlCN3 heterocycles. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2019. [DOI: 10.1515/znb-2019-0138] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The active Lewis pairs (ALPs) 2,6-Me2H8C5N–C(H) = C(SiMe3)–AlR2 (1a: R =
t
Bu, 1b, R =
i
Bu) have strained AlC2N heterocycles and relatively weak Al–N bonds. They react readily with a series of organic azides R′N3 [R′ = Ph, CH2C6H4(4-
t
Bu),
t
Bu, SiMe3, CH2Ph] by cleavage of the heterocycles and addition of the azides with their α-N atoms to the Al atom. The Al–N interactions result in an activation of the azide groups which insert into the C–Si bonds of the vinyl groups with their terminal γ-N atoms. Compounds with approximately planar five-membered AlCN3 heterocycles and intact N3 groups are formed in highly selective reactions.
Collapse
Affiliation(s)
- Werner Uhl
- Institut für Anorganische und Analytische Chemie der Universität Münster , Corrensstraße 30 , 48149 Münster , Germany
| | - Katja Martinewski
- Institut für Anorganische und Analytische Chemie der Universität Münster , Corrensstraße 30 , 48149 Münster , Germany
| | - Julia Silissa Bruchhage
- Institut für Anorganische und Analytische Chemie der Universität Münster , Corrensstraße 30 , 48149 Münster , Germany
| | - Alexander Hepp
- Institut für Anorganische und Analytische Chemie der Universität Münster , Corrensstraße 30 , 48149 Münster , Germany
| | - Marcus Layh
- Institut für Anorganische und Analytische Chemie der Universität Münster , Corrensstraße 30 , 48149 Münster , Germany
| | - Fabian Dielmann
- Institut für Anorganische und Analytische Chemie der Universität Münster , Corrensstraße 30 , 48149 Münster , Germany
| | - Paul Mehlmann
- Institut für Anorganische und Analytische Chemie der Universität Münster , Corrensstraße 30 , 48149 Münster , Germany
| |
Collapse
|
10
|
Uhl W, Hengesbach F, Isermann J, Soleimani M, Schürmann L, Hepp A, Layh M. New Ga/N‐based Active Lewis Pairs, Trifunctional Ga–Ga Compounds, Reactions with Cyanamide and Dual Insertion of Isocyanate. Z Anorg Allg Chem 2019. [DOI: 10.1002/zaac.201900195] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Werner Uhl
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Frank Hengesbach
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Jennifer Isermann
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Meisam Soleimani
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Lina Schürmann
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Alexander Hepp
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Marcus Layh
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| |
Collapse
|
11
|
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.
Collapse
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.
| |
Collapse
|
12
|
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.
Collapse
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
| |
Collapse
|
13
|
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
| |
Collapse
|
14
|
Jie X, Daniliuc CG, Knitsch R, Hansen MR, Eckert H, Ehlert S, Grimme S, Kehr G, Erker G. Aggregation Behavior of a Six-Membered Cyclic Frustrated Phosphane/Borane Lewis Pair: Formation of a Supramolecular Cyclooctameric Macrocyclic Ring System. Angew Chem Int Ed Engl 2018; 58:882-886. [PMID: 30452100 DOI: 10.1002/anie.201811873] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Indexed: 11/08/2022]
Abstract
A new six-membered cyclic frustrated phosphane/borane Lewis pair was liberated from its HB(C6 F5 )2 adduct by treatment with vinylcyclohexane. The system is an active frustrated Lewis pair that undergoes cycloaddition reactions with suitable π reagents and it splits dihydrogen. At room temperature in solution the new compound is a monomer, however, in the crystal and in solution at low temperature it aggregates to a thermodynamically favoured supramolecular macrocyclic cyclooctamer.
Collapse
Affiliation(s)
- Xiaoming Jie
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Robert Knitsch
- Institut für Physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28, 48149, Münster, Germany
| | - Michael Ryan Hansen
- Institut für Physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28, 48149, Münster, Germany
| | - Hellmut Eckert
- Institut für Physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28, 48149, Münster, Germany.,Instituto de Fisica, Sáo Carlos, Universidade de São Paulo, CP 369, 13560-970, São Carlos S.P., Brazil
| | - Sebastian Ehlert
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, Universität Bonn, Beringstraße 4, 53115, Bonn, Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, Universität Bonn, Beringstraße 4, 53115, Bonn, Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| |
Collapse
|
15
|
Jie X, Daniliuc CG, Knitsch R, Hansen MR, Eckert H, Ehlert S, Grimme S, Kehr G, Erker G. Aggregation Behavior of a Six‐Membered Cyclic Frustrated Phosphane/Borane Lewis Pair: Formation of a Supramolecular Cyclooctameric Macrocyclic Ring System. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201811873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xiaoming Jie
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Constantin G. Daniliuc
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Robert Knitsch
- Institut für Physikalische ChemieWestfälische Wilhelms-Universität Münster Corrensstraße 28 48149 Münster Germany
| | - Michael Ryan Hansen
- Institut für Physikalische ChemieWestfälische Wilhelms-Universität Münster Corrensstraße 28 48149 Münster Germany
| | - Hellmut Eckert
- Institut für Physikalische ChemieWestfälische Wilhelms-Universität Münster Corrensstraße 28 48149 Münster Germany
- Instituto de Fisica, Sáo CarlosUniversidade de São Paulo CP 369 13560-970 São Carlos S.P. Brazil
| | - Sebastian Ehlert
- Mulliken Center for Theoretical ChemistryInstitut für Physikalische und Theoretische ChemieUniversität Bonn Beringstraße 4 53115 Bonn Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical ChemistryInstitut für Physikalische und Theoretische ChemieUniversität Bonn Beringstraße 4 53115 Bonn Germany
| | - Gerald Kehr
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Gerhard Erker
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
| |
Collapse
|
16
|
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.
Collapse
Affiliation(s)
- Brian R Nichols
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26505, USA.
| | | | | | | |
Collapse
|
17
|
Wang L, Zhang S, Hasegawa Y, Daniliuc CG, Kehr G, Erker G. Cooperative carbon monoxide to formyl reduction at a trifunctional PBB frustrated Lewis pair. Chem Commun (Camb) 2018; 53:5499-5502. [PMID: 28435949 DOI: 10.1039/c7cc02214j] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Twofold hydroboration of the bulky Mes*P(vinyl)2 phosphane with Piers' borane [HB(C6F5)2] followed by C6F5/H exchange with 9-BBN generated a reactive P/B/BH FLP structure that cleanly reduced carbon monoxide at the trifunctional frustrated Lewis pair framework to the [B]-formyl stage.
Collapse
Affiliation(s)
- Long Wang
- Organisch-Chemisches Institut, Universität Münster, Corrensstr. 40, D-48149 Münster, Germany.
| | | | | | | | | | | |
Collapse
|
18
|
Wang T, Daniliuc CG, Mück-Lichtenfeld C, Kehr G, Erker G. Formation of Reactive π-Conjugated Frustrated N/B Pairs by Borane-Induced Propargyl Amine Rearrangement. J Am Chem Soc 2018; 140:3635-3643. [PMID: 29444567 DOI: 10.1021/jacs.7b11958] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
N-Propargyltetramethylpiperidine reacts with a series of trans-alkenyl-B(C6F5)2 compounds to give the substituted alkenyl-bridged frustrated N/B Lewis pairs 5. Their structures and spectroscopic features indicate a pronounced participation of the mesomeric s-trans-iminium/borata-alkene resonance form. The compounds are thought to be formed in a stepwise addition/rearrangement process which is initiated by a trans-1,2-amine/borane FLP addition to the carbon-carbon triple bond to generate a reactive zwitterionic aziridinium/alkenylborate intermediate. Subsequent alkenylborate attack leads to opening of the activated three-membered heterocycle with clean formation of the products 5a-c. Treatment of the propargyl-TMP substrate with B(C6F5)3 gave a stable example of such an aziridinium/borate betaine, which was isolated and amply characterized. The products 5a-c are active N/B FLPs. They split dihydrogen heterolytically under mild conditions to give the respective NH+/BH- products 9a-c. These contain Z-configurated core C═C double bonds, which indicates rotational equilibration around the central C-C bond of 5a-c during this reaction. Structural and chemical features of the 5c system were analyzed by DFT calculations.
Collapse
Affiliation(s)
- Tongdao Wang
- Organisch-Chemisches Institut , Westfälische Wilhelms-Universität Münster , Corrensstraße 40 , 48149 Münster , Germany
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut , Westfälische Wilhelms-Universität Münster , Corrensstraße 40 , 48149 Münster , Germany
| | - Christian Mück-Lichtenfeld
- Organisch-Chemisches Institut , Westfälische Wilhelms-Universität Münster , Corrensstraße 40 , 48149 Münster , Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut , Westfälische Wilhelms-Universität Münster , Corrensstraße 40 , 48149 Münster , Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut , Westfälische Wilhelms-Universität Münster , Corrensstraße 40 , 48149 Münster , Germany
| |
Collapse
|
19
|
Li J, Daniliuc CG, Kehr G, Erker G. A convenient route to internally phosphane-stabilized aryltriborane(7) compounds. Chem Commun (Camb) 2018; 54:12606-12609. [DOI: 10.1039/c8cc06728g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The treatment of o-lithiated aryl(dimesityl)phosphanes with excess borane dimethylsulfide adduct eventually gave the aryl substituted internally phosphane-stabilized triborane(7) derivatives.
Collapse
Affiliation(s)
- Jun Li
- Organisch-Chemisches Institut
- Westfälische Wilhelms-Universität Münster
- 48149 Münster
- Germany
| | - Constantin G. Daniliuc
- Organisch-Chemisches Institut
- Westfälische Wilhelms-Universität Münster
- 48149 Münster
- Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut
- Westfälische Wilhelms-Universität Münster
- 48149 Münster
- Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut
- Westfälische Wilhelms-Universität Münster
- 48149 Münster
- Germany
| |
Collapse
|
20
|
Hofmann A, Lamprecht A, González-Belman OF, Dewhurst RD, Jiménez-Halla JOC, Kachel S, Braunschweig H. Dialumination of unsaturated species with a reactive bis(cyclopentadienyl) dialane. Chem Commun (Camb) 2018; 54:1639-1642. [DOI: 10.1039/c7cc09596a] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new cyclopentadienyl-containing dialane is prepared and found to undergo dialumination reactions with unsaturated species.
Collapse
Affiliation(s)
- Alexander Hofmann
- Institute for Inorganic Chemistry
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
- Institute for Sustainable Chemistry & Catalysis with Boron
| | - Anna Lamprecht
- Institute for Inorganic Chemistry
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
- Institute for Sustainable Chemistry & Catalysis with Boron
| | | | - Rian D. Dewhurst
- Institute for Inorganic Chemistry
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
- Institute for Sustainable Chemistry & Catalysis with Boron
| | | | - Stephanie Kachel
- Institute for Inorganic Chemistry
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
- Institute for Sustainable Chemistry & Catalysis with Boron
| | - Holger Braunschweig
- Institute for Inorganic Chemistry
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
- Institute for Sustainable Chemistry & Catalysis with Boron
| |
Collapse
|
21
|
Dong S, Wang L, Wang T, Daniliuc CG, Brinkkötter M, Eckert H, Kehr G, Erker G. Formation and reactions of active five-membered phosphane/borane frustrated Lewis pair ring systems. Dalton Trans 2018; 47:4449-4454. [DOI: 10.1039/c8dt00672e] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The five-membered P/B FLP ring systems featuring very bulky Tipp or Mes* aryl groups at phosphorus undergo addition reactions with organic π-reagents.
Collapse
Affiliation(s)
- Shunxi Dong
- Organisch-Chemisches Institut
- Westfälische Wilhelms-Universität Münster
- Münster
- Germany
| | - Long Wang
- Organisch-Chemisches Institut
- Westfälische Wilhelms-Universität Münster
- Münster
- Germany
| | - Tongdao Wang
- Organisch-Chemisches Institut
- Westfälische Wilhelms-Universität Münster
- Münster
- Germany
| | | | - Melanie Brinkkötter
- Institut für Physikalische Chemie and Graduate School of Chemistry
- Westfälische Wilhelms-Universität Münster
- 48149 Münster
- Germany
| | - Hellmut Eckert
- Institut für Physikalische Chemie and Graduate School of Chemistry
- Westfälische Wilhelms-Universität Münster
- 48149 Münster
- Germany
- Institute of Physics in Sao Carlos
| | - Gerald Kehr
- Organisch-Chemisches Institut
- Westfälische Wilhelms-Universität Münster
- Münster
- Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut
- Westfälische Wilhelms-Universität Münster
- Münster
- Germany
| |
Collapse
|
22
|
Yin Q, Kemper S, Klare HFT, Oestreich M. Boron Lewis Acid-Catalyzed Hydroboration of Alkenes with Pinacolborane: BAr F3 Does What B(C 6 F 5 ) 3 Cannot Do! Chemistry 2016; 22:13840-13844. [PMID: 27447683 DOI: 10.1002/chem.201603466] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Indexed: 11/06/2022]
Abstract
The transition-metal-free hydroboration of various alkenes with pinacolborane (HBpin) initiated by tris[3,5-bis(trifluoromethyl)phenyl]borane (BArF3 ) is reported. The choice of the boron Lewis acid is crucial as the more prominent boron Lewis acid tris(pentafluorophenyl)borane (B(C6 F5 )3 ) is reluctant to react. Unlike B(C6 F5 )3 , BArF3 is found to engage in substituent redistribution with HBpin, resulting in the formation of ArF Bpin and the electron-deficient diboranes [H2 BArF ]2 and [(ArF )(H)B(μ-H)2 BArF2 ]. These in situ-generated hydroboranes undergo regioselective hydroboration of styrene derivatives as well as aliphatic alkenes with cis diastereoselectivity. Another ligand metathesis of these adducts with HBpin subsequently affords the corresponding HBpin-derived anti-Markovnikov adducts. The reactive hydroboranes are regenerated in this step, thereby closing the catalytic cycle.
Collapse
Affiliation(s)
- Qin Yin
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623, Berlin, Germany
| | - Sebastian Kemper
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623, Berlin, Germany
| | - Hendrik F T Klare
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623, Berlin, Germany.
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623, Berlin, Germany.
| |
Collapse
|
23
|
Cakir T, Sabuncuoglu MZ, Soyer V, Sarici B, Koc S, Onur A, Unal B, Akbulut S, Yilmaz S. Use of the Right Lobe Graft With Double Hepatic Arteries in Living-Donor Liver Transplant. EXP CLIN TRANSPLANT 2016; 20:495-499. [PMID: 26767402 DOI: 10.6002/ect.2015.0108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVES We aimed to examine management of double hepatic artery reconstruction in patients under going living-donor liver transplant. MATERIALS AND METHODS Between January 2002 and June 2014, one thousand thirty-six living-donor liver transplants were performed at the Liver Transplant Institute of Malatya Inonu University. Living liver grafts with a single hepatic artery were used in 983 living-donor liver transplants, while grafts with double hepatic artery branches were used in 53 living-donor liver transplants. All of the liver grafts with double hepatic artery branches were right lobe grafts. Hepatic artery anastomosis technique and the other medical data of recipients who used grafts with double hepatic arteries were analyzed retrospectively. RESULTS A double hepatic artery anastomosis was created in 43 recipients, while a single anastomosis was created in the remaining 10 because of ligation of the nondominant hepatic artery branch. In 40 recipients, double hepatic artery branches in the graft were anastomosed with the recipient's right and left hepatic artery. In the remaining 3 recipients, double hepatic artery branches in the graft were anastomosed with the recipient's right hepatic artery and large segment 4 hepatic arteries. Postoperative complications related with hepatic artery anas-tomoses developed in 3 recipients: hepatic artery thrombosis (n = 1), hepatic artery aneurysm (n = 1), and hepatic artery stenosis (n = 1). A recipient with hepatic artery aneurysm immediately underwent a retransplant. A recipient with a hepatic artery thrombosis relapsed and required retransplant, which was treated with thrombectomy on postoperative day 10. A recipient with hepatic artery stenosis was followed conservatively. In our series, the incidence of complications related with double hepatic artery anastomosis was found to be 6.9%. CONCLUSIONS According to our experiences, a double hepatic artery anastomosis does not increase the risk of hepatic artery thrombosis and can be performed safely by surgeons who are experienced with hepatic vascular reconstructions in a living-donor liver transplant recipient.
Collapse
Affiliation(s)
- Tugrul Cakir
- From the Inonu University, Faculty of Medicine, Department of General Surgery, Malatya, Turkey
| | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Erdmann M, Wiegand T, Blumenberg J, Eckert H, Ren J, Daniliuc CG, Kehr G, Erker G. Formation, structural characterization, and reactions of a unique cyclotrimeric vicinal Lewis pair containing (C6F5)2P-Lewis base and (C6F5)BH-Lewis acid components. Dalton Trans 2014; 43:15159-69. [DOI: 10.1039/c4dt02081b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A unique vicinal Lewis pair cyclotrimer has been synthesized and characterized with respect to its structure and reactivity.
Collapse
Affiliation(s)
- Markus Erdmann
- Organisch-Chemisches Institut
- WWU Münster
- D 48149 Münster, Germany
| | - Thomas Wiegand
- Institut für Physikalische Chemie and Graduate School of Chemistry
- WWU Münster
- D 48149 Münster, Germany
| | - Jonas Blumenberg
- Organisch-Chemisches Institut
- WWU Münster
- D 48149 Münster, Germany
| | - Hellmut Eckert
- Institut für Physikalische Chemie and Graduate School of Chemistry
- WWU Münster
- D 48149 Münster, Germany
| | - Jinjun Ren
- Institut für Physikalische Chemie and Graduate School of Chemistry
- WWU Münster
- D 48149 Münster, Germany
| | | | - Gerald Kehr
- Organisch-Chemisches Institut
- WWU Münster
- D 48149 Münster, Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut
- WWU Münster
- D 48149 Münster, Germany
| |
Collapse
|
25
|
Courtemanche MA, Larouche J, Légaré MA, Bi W, Maron L, Fontaine FG. A Tris(triphenylphosphine)aluminum Ambiphilic Precatalyst for the Reduction of Carbon Dioxide with Catecholborane. Organometallics 2013. [DOI: 10.1021/om400645s] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Marc-André Courtemanche
- Département de Chimie, Centre de Catalyse et
Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec (Québec),
Canada G1V 0A6
| | - Jérémie Larouche
- Département de Chimie, Centre de Catalyse et
Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec (Québec),
Canada G1V 0A6
| | - Marc-André Légaré
- Département de Chimie, Centre de Catalyse et
Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec (Québec),
Canada G1V 0A6
| | - Wenhua Bi
- Département de Chimie, Centre de Catalyse et
Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec (Québec),
Canada G1V 0A6
| | - Laurent Maron
- Université de Toulouse, INSA, UPS, LCPNO, CNRS, UMR 5215 CNRS-UPS-INSA,
135 avenue de Rangueil, Toulouse, France
| | - Frédéric-Georges Fontaine
- Département de Chimie, Centre de Catalyse et
Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec (Québec),
Canada G1V 0A6
| |
Collapse
|
26
|
Xu BH, Bussmann K, Fröhlich R, Daniliuc CG, Brandenburg JG, Grimme S, Kehr G, Erker G. An Enamine/HB(C6F5)2 Adduct as a Dormant State in Frustrated Lewis Pair Chemistry. Organometallics 2013. [DOI: 10.1021/om4004225] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bao-Hua Xu
- Organisch-chemisches
Institut der Universität Münster, Corrensstrasse 40, 48149 Münster,
Germany
| | - Kathrin Bussmann
- Organisch-chemisches
Institut der Universität Münster, Corrensstrasse 40, 48149 Münster,
Germany
| | - Roland Fröhlich
- Organisch-chemisches
Institut der Universität Münster, Corrensstrasse 40, 48149 Münster,
Germany
| | - Constantin G. Daniliuc
- Organisch-chemisches
Institut der Universität Münster, Corrensstrasse 40, 48149 Münster,
Germany
| | - Jan Gerit Brandenburg
- Mulliken Center
for Theoretical
Chemistry, Institut für
Physikalische und Theoretische Chemie, Universität Bonn, Beringstraße 4, 53115 Bonn, Germany
| | - Stefan Grimme
- Mulliken Center
for Theoretical
Chemistry, Institut für
Physikalische und Theoretische Chemie, Universität Bonn, Beringstraße 4, 53115 Bonn, Germany
| | - Gerald Kehr
- Organisch-chemisches
Institut der Universität Münster, Corrensstrasse 40, 48149 Münster,
Germany
| | - Gerhard Erker
- Organisch-chemisches
Institut der Universität Münster, Corrensstrasse 40, 48149 Münster,
Germany
| |
Collapse
|
27
|
A frustrated-Lewis-pair approach to catalytic reduction of alkynes to cis-alkenes. Nat Chem 2013; 5:718-23. [DOI: 10.1038/nchem.1693] [Citation(s) in RCA: 303] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 05/13/2013] [Indexed: 11/08/2022]
|
28
|
Ge F, Kehr G, Daniliuc CG, Erker G. Unusual Pathway Taken in the Reaction of Bis(alkynyl)diisopropylaminoboranes with B(C6F5)3. Chem Asian J 2013; 8:2227-34. [DOI: 10.1002/asia.201300536] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Indexed: 11/08/2022]
|
29
|
Stute A, Kehr G, Daniliuc CG, Fröhlich R, Erker G. Electronic control in frustrated Lewis pair chemistry: adduct formation of intramolecular FLP systems with –P(C6F5)2 Lewis base components. Dalton Trans 2013; 42:4487-99. [DOI: 10.1039/c2dt32806b] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|