1
|
Rutz PM, Kleeberg C. Copper Catalyzed Borylation of Alkynes: An Experimental Mechanistic Study. Chem Asian J 2024; 19:e202400286. [PMID: 38738792 DOI: 10.1002/asia.202400286] [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: 03/14/2024] [Revised: 05/08/2024] [Accepted: 05/09/2024] [Indexed: 05/14/2024]
Abstract
The copper catalyzed hydroboration of alkynes with B2pin2 was studied by in detail studies of individual relevant steps along the catalytic pathway. A number of reaction steps were retraced by in situ NMR spectroscopy as well as central intermediates and side-products were isolated and comprehensively characterized. A copper boryl complex is central to the catalytic process by inserting the terminal alkyne substrate into the B-Cu bond. The selectivity of this step - depending on the NHC auxiliary ligand - determines the α/β selectivity observed in the product. The latter complex is protonated by the auxiliary alcohol reagent resulting in hydroboration product formation and formation of a Cu alkoxido complex. Reaction of the latter with B2pin2 results in the regeneration of the central copper boryl complex. This alcoholysis step depends on the acidity of the alcohol, in particular on the relative acidity of the alcohol vs. the alkyne substrate. A number of side reactions leading to the hydrogenation product of the alkyne substrate and a bis hydroborated product were identified and studied in some detail. It is concluded that the performance of a particular catalytic system depends crucially on the relative acidities of the reagents and generalizations may be difficult.
Collapse
Affiliation(s)
- Philipp M Rutz
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106, Braunschweig, Germany
| | - Christian Kleeberg
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106, Braunschweig, Germany
| |
Collapse
|
2
|
Pearce KG, Morris LJ, Robinson TP, Johnson AL, Mahon MF, Hill MS. From alkaline earth to coinage metal carboranyls. Dalton Trans 2024; 53:6653-6659. [PMID: 38525661 DOI: 10.1039/d4dt00478g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
The β-diketiminato calcium and magnesium complexes, [(BDI)MgnBu] and [(BDI)CaH]2 (BDI = HC{C(Me)NDipp}2; Dipp = 2,6-di-isopropylphenyl), react with ortho-carborane (o-C2B10H12) to provide the respective [(BDI)Ae(o-C2B10H11)] (Ae = Mg or Ca) complexes. While the lighter group 2 species is a monomer with magnesium in a distorted trigonal planar environment, the heavier analogue displays a puckered geometry at calcium in the solid state due to Ca⋯H-B intermolecular interactions. These secondary contacts are, however, readily disrupted upon addition of THF to provide the 4-coordinate monomer, [(BDI)Ca(THF)(o-C2B10H11)]. [(BDI)Mg(o-C2B10H11)] was reacted with [NHCIPrMCl] (NHCIPr = 1,3-bis(isopropyl)imidazol-2-ylidene; M = Cu, Ag, Au) to provide [NHCIPrM(o-C2B10H11)], rare C-bonded examples of coinage metal derivatives of unsubstituted (o-C2B10H11)- and confirming the alkaline earth compounds as viable reagents for the transmetalation of the carboranyl anion.
Collapse
Affiliation(s)
- Kyle G Pearce
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.
| | - Louis J Morris
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.
| | - Thomas P Robinson
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.
| | - Andrew L Johnson
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.
| | - Mary F Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.
| | - Michael S Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.
| |
Collapse
|
3
|
Babula DJ, Charman RSC, Hobson JA, Mahon MF, Liptrot DJ. Dial-a-base mechanochemical synthesis of N-heterocyclic carbene copper complexes. Dalton Trans 2024; 53:3990-3993. [PMID: 38372037 DOI: 10.1039/d4dt00334a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Liquid assisted ball milling of [NHC]HBr (NHC = N-heterocyclic carbene) salts with copper(I) chloride, and a range of alkali metal complexes was shown to efficiently produce (NHC)CuX (NHC = normal or RE-NHC, X = halide, alkoxide, amide, alkyl, aryl; RE-NHC = ring-expanded NHC).
Collapse
Affiliation(s)
- Dawid J Babula
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
- Institute for Sustainability, University of Bath, Bath, BA2 7AY, UK
| | - Rex S C Charman
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
| | - Josie A Hobson
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
| | - Mary F Mahon
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
| | - David J Liptrot
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
| |
Collapse
|
4
|
Charman RSC, Evans NJ, English LE, Neale SE, Vasko P, Mahon MF, Liptrot DJ. The structures and reactivity of NHC-supported copper(i) triphenylgermyls. Chem Sci 2024; 15:584-593. [PMID: 38179511 PMCID: PMC10763552 DOI: 10.1039/d3sc05862j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 11/30/2023] [Indexed: 01/06/2024] Open
Abstract
Deprotonation of triphenyl germane with NHC-supported copper alkoxides afforded four novel (NHC)CuGePh3 complexes. Of these, (IPr)CuGePh3 (IPr = :C{N(2,6-iPr2C6H3)CH}2) was selected for further investigation. Analysis by EDA-NOCV indicates it to be a germyl nucleophile and its σ-bond metathesis reaction with a range of p-block halides confirmed it to be a convenient source of [Ph3Ge]-. The Cu-Ge bond of (IPr)CuGePh3 underwent π-bond insertions with tBuNCS, CS2, and PhNCO to furnish a series of germyl substituted carboxylate derivatives, (IPr)CuXC(Y)GePh3 (X = S, NPh; Y = S, NtBu, O), which were structurally characterised. (IPr)CuGePh3 inserted phenyl acetylene, providing both the Markovnikov and anti-Markovnikov products. The (NHC)CuGePh3 compounds were validated as catalytic intermediates; addition of 10 mol% of NHC-copper(i) alkoxide to a mixture of triphenyl germane and a tin(iv) alkoxide resulted in a tin/germanium cross coupling with concomitant formation of alcohol. Moreover, a catalytic hydrogermylation of Michael acceptors was developed with Ph3GeH adding to 7 activated alkenes in good conversions and yields in the presence of 10 mol% of NHC-copper(i) alkoxide. In all cases, this reaction provided the β-germylated substrate implicating nucleophilicity at germanium.
Collapse
Affiliation(s)
| | - Nick J Evans
- Department of Chemistry, University of Bath Bath BA2 7AY UK
| | - Laura E English
- Department of Chemistry, University of Bath Bath BA2 7AY UK
- Centre for Sustainable and Circular Technology Bath BA2 7AY UK
| | - Samuel E Neale
- Department of Chemistry, University of Bath Bath BA2 7AY UK
| | - Petra Vasko
- Department of Chemistry, University of Helsinki A.I. Virtasen aukio 1 P.O. Box 55 FI-00014 Finland
| | - Mary F Mahon
- X-Ray Crystallography Suite, University of Bath Bath BA2 7AY UK
| | | |
Collapse
|
5
|
Lee H, Lee Y, Lee Y, Kamranifard T, Lee Y, Jung B. Cu-Catalyzed Synthesis of 2-Silyl-1,3-butadienes from Allenols and Applications to One-Pot Synthesis of Tetrasubstituted Arylsilanes. Org Lett 2023. [PMID: 38049370 DOI: 10.1021/acs.orglett.3c03794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
A copper-catalyzed chemo- and stereoselective method for the synthesis of (E)-2-silyl-1,3-butadienes from a broad range of allenols using mild Si-B reagents is reported in this study. Our protocol required a short reaction time at ambient temperature to produce the desired dienes in high yields. Synthetic applications are highlighted by the one-pot synthesis of tetrasubstituted arylsilanes from allenols as well as the further functionalization of C-Si bonds.
Collapse
Affiliation(s)
- Hwiwoong Lee
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Yurim Lee
- Department of Physics and Chemistry, DGIST, Daegu 42988, Republic of Korea
| | - Yeonjoo Lee
- Department of Physics and Chemistry, DGIST, Daegu 42988, Republic of Korea
| | - Telma Kamranifard
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Yunmi Lee
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Byunghyuck Jung
- Department of Physics and Chemistry, DGIST, Daegu 42988, Republic of Korea
| |
Collapse
|
6
|
Beig N, Goyal V, Bansal RK. Application of N-heterocyclic carbene-Cu(I) complexes as catalysts in organic synthesis: a review. Beilstein J Org Chem 2023; 19:1408-1442. [PMID: 37767335 PMCID: PMC10520485 DOI: 10.3762/bjoc.19.102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 09/05/2023] [Indexed: 09/29/2023] Open
Abstract
N-Heterocyclic carbenes (NHCs) are a special type of carbenes in which the carbene carbon atom is part of the nitrogen heterocyclic ring. Due to the simplicity of their synthesis and the modularity of their stereoelectronic properties, NHCs have unquestionably emerged as one of the most fascinating and well-known species in chemical science. The remarkable stability of NHCs can be attributed to both kinetic as well as thermodynamic effects caused by its structural features. NHCs constitute a well-established class of new ligands in organometallic chemistry. Although initially NHCs were regarded as pure σ-donor ligands, later experimental and theoretical studies established the presence of a significant back donation from the d-orbital of the metal to the π* orbital of the NHC. Over the last two decades, NHC-metal complexes have been extensively used as efficient catalysts in different types of organic reactions. Of these, NHC-Cu(I) complexes found prominence for various reasons, such as ease of preparation, possibility of structural diversity, low cost, and versatile applications. This article overviews applications of NHC-Cu(I) complexes as catalysts in organic synthesis over the last 12 years, which include hydrosilylation reactions, conjugate addition, [3 + 2] cycloaddition, A3 reaction, boration and hydroboration, N-H and C(sp2)-H carboxylation, C(sp2)-H alkenylation and allylation, C(sp2)-H arylation, C(sp2)-H amidation, and C(sp2)-H thiolation. Preceding the section of applications, a brief description of the structure of NHCs, nature of NHC-metal bond, and methods of preparation of NHC-Cu complexes is provided.
Collapse
Affiliation(s)
- Nosheen Beig
- Department of Chemistry, The IIS (deemed to be University), Jaipur, 302 020, India
| | - Varsha Goyal
- Department of Chemistry, The IIS (deemed to be University), Jaipur, 302 020, India
| | - Raj Kumar Bansal
- Department of Chemistry, The IIS (deemed to be University), Jaipur, 302 020, India
| |
Collapse
|
7
|
Maeda C, Cho T, Kumemoto R, Ema T. Cu-catalyzed carboxylation of organoboronic acid pinacol esters with CO 2. Org Biomol Chem 2023; 21:6565-6571. [PMID: 37526922 DOI: 10.1039/d3ob00938f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Chemical fixation of CO2 has received much attention. In particular, catalytic C-C bond formation with CO2 giving carboxylic acids is of great significance. Among the CO2 fixation methods, multiple carboxylation is one of the challenging subjects. Here we investigated the Cu-catalyzed carboxylation of a variety of boronic acid pinacol esters (C(sp2)-, C(sp3)-, and C(sp)-B compounds) with CO2, which efficiently provided the corresponding products, including aryl, alkenyl, alkyl, and alkynyl carboxylic acids. This carboxylation was also applicable to multiple CO2 fixation giving di- and tri-carboxylic acids under robust reaction conditions (totally 29 examples).
Collapse
Affiliation(s)
- Chihiro Maeda
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Okayama 700-8530, Japan.
| | - Takumi Cho
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Okayama 700-8530, Japan.
| | - Ren Kumemoto
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Okayama 700-8530, Japan.
| | - Tadashi Ema
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Okayama 700-8530, Japan.
| |
Collapse
|
8
|
Wagler J, Gericke R. Ge-Cu-Complexes Ph(pyO)Ge(μ 2-pyO) 2CuCl and PhGe(μ 2-pyO) 4CuCl-Representatives of Cu(I)→Ge(IV) and Cu(II)→Ge(IV) Dative Bond Systems. Molecules 2023; 28:5442. [PMID: 37513314 PMCID: PMC10385301 DOI: 10.3390/molecules28145442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/05/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
Phenylgermaniumpyridine-2-olate PhGe(pyO)3 (compound 1Ge) and CuCl react with the formation of the heteronuclear complex Ph(pyO)Ge(μ2-pyO)2CuCl (2Ge') rather than forming the expected compound PhGe(μ2-pyO)3CuCl (2Ge). Single-point calculations (at the B2T-PLYP level) of the optimized molecular structures confirmed the relative stability of isomer 2Ge' over 2Ge and, for the related silicon congeners, the relative stability of 2Si over 2Si'. Decomposition of a solution of 2Ge' upon access to air provided access to some crystals of the copper(II) compound PhGe(μ2-pyO)4CuCl (3Ge). Compounds 2Ge' and 3Ge were characterized by single-crystal X-ray diffraction analyses, and the Ge-Cu bonds in these compounds were analyzed with the aid of quantum chemical calculations, e.g., Natural Bond Orbital analyses (NBO), Non-Covalent Interactions descriptor (NCI), and topology of the electron density at bond critical point using Quantum Theory of Atoms-In-Molecules (QTAIM) in conjunction with the related silicon compounds PhSi(μ2-pyO)3CuCl (2Si), PhSi(μ2-pyO)4CuCl (3Si), as well as the potential isomers Ph(pyO)Si(μ2-pyO)2CuCl (2Si') and PhGe(μ2-pyO)3CuCl (2Ge). Pronounced Cu→Ge (over Cu→Si) lone pair donation was found for the Cu(I) compounds, whereas in Cu(II) compounds 3Si and 3Ge, this σ-donation is less pronounced and only marginally enhanced in 3Ge over 3Si.
Collapse
Affiliation(s)
- Jörg Wagler
- Institut für Anorganische Chemie, TU Bergakademie Freiberg, 09596 Freiberg, Germany
| | - Robert Gericke
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf eV, 01328 Dresden, Germany
| |
Collapse
|
9
|
Reactivity and Stability of a Ring-Expanded N-Heterocyclic Carbene Copper(I) Boryl Imidinate. INORGANICS 2022. [DOI: 10.3390/inorganics10090135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Frustrated Lewis pairs (FLPs) have evolved from a revolutionary concept to widely applied catalysts. We recently reported the ring-expanded N-heterocyclic carbene supported copper(I) boryliminomethanide, (6-Dipp)CuC(=NtBu)Bpin and noted it reacted with heterocumulenes in a fashion reminiscent of FLPs. We thus set out to explore its reactivity with a range of other substrates known to react with FLPs. This was undertaken by a series of synthetic studies using NMR spectroscopy, mass spectrometry, IR spectroscopy, and single crystal X-ray crystallography. (6-Dipp)CuC(=NtBu)Bpin was investigated for its reactivity towards water, hydrogen, and phenylacetylene. Its solution stability was also explored. Upon heating, (6-Dipp)CuC(=NtBu)Bpin decomposed to (6-Dipp)CuCN, which was characterised by SC-XRD and NMR spectroscopy, and pinBtBu. Although no reaction was observed with hydrogen, (6-Dipp)CuC(=NtBu)Bpin reacted with water to form (6-Dipp)CuC(=N(H)tBu)B(OH)pin, which was structurally characterised. In contrast to its FLP-reminiscent heterolytic cleavage reactivity towards water, (6-Dipp)CuC(=NtBu)Bpin acted as a Brønsted base towards phenyl acetylene generating (6-Dipp)CuCCPh, which was characterised by SC-XRD, IR, and NMR spectroscopy, and HC(=NtBu)Bpin
Collapse
|
10
|
Fujihara T. Cu-Catalyzed Transformations of 1,3-Dienes: Use of Allyl Copper Intermediates in Functionalization. J SYN ORG CHEM JPN 2022. [DOI: 10.5059/yukigoseikyokaishi.80.738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
11
|
Abe S, Inagawa Y, Kobayashi R, Ishida S, Iwamoto T. Silyl(silylene) Coinage Metal Complexes Obtained from Isolable Cyclic Alkylsilylenes. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00040] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Shunya Abe
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Yuichiro Inagawa
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Ryo Kobayashi
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Shintaro Ishida
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Takeaki Iwamoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| |
Collapse
|
12
|
Charman RSC, Mahon MF, Lowe JP, Liptrot DJ. The structures of ring-expanded NHC supported copper(I) triphenylstannyls and their phenyl transfer reactivity towards heterocumulenes. Dalton Trans 2022; 51:831-835. [PMID: 34994747 DOI: 10.1039/d1dt03109k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three ring-expanded N-heterocyclic carbene-supported copper(I) triphenylstannyls have been synthesised by the reaction of (RE-NHC)CuOtBu with triphenylstannane (RE-NHC = 6-Mes, 6-Dipp, 7-Dipp). The compounds were characterised by NMR spectroscopy and X-ray crystallography. Reaction of (6-Mes)CuSnPh3 with di-p-tolyl carbodiimide, phenyl isocyanate and phenylisothiocyanate gives access to a copper(I) benzamidinate, benzamide and benzothiamide respectively via phenyl transfer from the triphenylstannyl anion with concomitant formation of (Ph2Sn)n. Attempts to exploit this reactivity under a catalytic regime were hindered by rapid copper(I)-catalysed dismutation of Ph3SnH to Ph4Sn, various perphenylated tin oligomers, H2 and a metallic material thought to be Sn(0). Mechanistic insight was provided by reaction monitoring via NMR spectroscopy and mass spectrometry.
Collapse
Affiliation(s)
- Rex S C Charman
- Department of Chemistry, University of Bath. Claverton Down, Bath, BA2 7AY UK.
| | - Mary F Mahon
- Department of Chemistry, University of Bath. Claverton Down, Bath, BA2 7AY UK.
| | - John P Lowe
- Department of Chemistry, University of Bath. Claverton Down, Bath, BA2 7AY UK.
| | - David J Liptrot
- Department of Chemistry, University of Bath. Claverton Down, Bath, BA2 7AY UK.
| |
Collapse
|
13
|
Ibni Hashim I, Scattolin T, Tzouras NV, Bourda L, Van Hecke K, Ritacco I, Caporaso L, Cavallo L, Nolan SP, Cazin CSJ. Straightforward synthesis of [Cu(NHC)(alkynyl)] and [Cu(NHC)(thiolato)] complexes (NHC = N-heterocyclic carbene). Dalton Trans 2021; 51:231-240. [PMID: 34881762 DOI: 10.1039/d1dt03710b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthetic access to monomeric copper-alkynyl and copper-thiolato complexes of the type [(NHC)Cu(R)] (R = alkynyl or thiolato) using a weak base approach is reported. All reported reactions proceed under mild conditions in air and in environmentally acceptable solvents. The novel complexes are fully characterized and single crystal X-ray analyses unambiguously establish the atom connectivity in these mononuclear complexes. The importance of the supporting NHC ligand's steric properties in stabilizing mononuclear complexes is discussed.
Collapse
Affiliation(s)
- Ishfaq Ibni Hashim
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 281 (S-3), 9000, Ghent, Belgium.
| | - Thomas Scattolin
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 281 (S-3), 9000, Ghent, Belgium.
| | - Nikolaos V Tzouras
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 281 (S-3), 9000, Ghent, Belgium.
| | - Laurens Bourda
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 281 (S-3), 9000, Ghent, Belgium.
| | - Kristof Van Hecke
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 281 (S-3), 9000, Ghent, Belgium.
| | - Ida Ritacco
- Dipartimento di Chimica e Biologia, University of Salerno, Fisciano, 84048, Italy
| | - Lucia Caporaso
- Dipartimento di Chimica e Biologia, University of Salerno, Fisciano, 84048, Italy
| | - Luigi Cavallo
- KAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 96500, Saudi Arabia
| | - Steven P Nolan
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 281 (S-3), 9000, Ghent, Belgium.
| | - Catherine S J Cazin
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 281 (S-3), 9000, Ghent, Belgium.
| |
Collapse
|
14
|
Gao Y, Yazdani S, Kendrick A, Junor GP, Kang T, Grotjahn DB, Bertrand G, Jazzar R, Engle KM. Cyclic (Alkyl)(amino)carbene Ligands Enable Cu‐Catalyzed Markovnikov Protoboration and Protosilylation of Terminal Alkynes: A Versatile Portal to Functionalized Alkenes**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Yang Gao
- Department of Chemistry The Scripps Research Institute 10550 N Torrey Pines Road La Jolla CA 92037-1000 USA
| | - Sima Yazdani
- Department of Chemistry and Biochemistry University of California, San Diego UCSD-CNRS Joint Research Laboratory (IRL 3555) La Jolla CA 92093-0358 USA
- Department of Chemistry and Biochemistry San Diego State University 5500 Campanile Drive San Diego CA 92182-1030 USA
| | - Aaron Kendrick
- Department of Chemistry The Scripps Research Institute 10550 N Torrey Pines Road La Jolla CA 92037-1000 USA
| | - Glen P. Junor
- Department of Chemistry and Biochemistry University of California, San Diego UCSD-CNRS Joint Research Laboratory (IRL 3555) La Jolla CA 92093-0358 USA
| | - Taeho Kang
- Department of Chemistry The Scripps Research Institute 10550 N Torrey Pines Road La Jolla CA 92037-1000 USA
| | - Douglas B. Grotjahn
- Department of Chemistry and Biochemistry San Diego State University 5500 Campanile Drive San Diego CA 92182-1030 USA
| | - Guy Bertrand
- Department of Chemistry and Biochemistry University of California, San Diego UCSD-CNRS Joint Research Laboratory (IRL 3555) La Jolla CA 92093-0358 USA
| | - Rodolphe Jazzar
- Department of Chemistry and Biochemistry University of California, San Diego UCSD-CNRS Joint Research Laboratory (IRL 3555) La Jolla CA 92093-0358 USA
| | - Keary M. Engle
- Department of Chemistry The Scripps Research Institute 10550 N Torrey Pines Road La Jolla CA 92037-1000 USA
| |
Collapse
|
15
|
O'Connor TJ, Mai BK, Nafie J, Liu P, Toste FD. Generation of Axially Chiral Fluoroallenes through a Copper-Catalyzed Enantioselective β-Fluoride Elimination. J Am Chem Soc 2021; 143:13759-13768. [PMID: 34465099 DOI: 10.1021/jacs.1c05769] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Herein we report the copper-catalyzed silylation of propargylic difluorides to generate axially chiral, tetrasubstituted monofluoroallenes in both good yields (27 examples >80%) and enantioselectivities (82-98% ee). Compared to previously reported synthetic routes to axially chiral allenes (ACAs) from prochiral substrates, a mechanistically distinct reaction has been developed: the enantiodiscrimination between enantiotopic fluorides to set an axial stereocenter. DFT calculations and vibrational circular dichroism (VCD) suggest that β-fluoride elimination from an alkenyl copper intermediate likely proceeds through a syn-β-fluoride elimination pathway rather than an anti-elimination pathway. The effects of the C1-symmetric Josiphos-derived ligand on reactivity and enantioselectivity were investigated. Not only does this report showcase that alkenyl copper species (like their alkyl counterparts) can undergo β-fluoride elimination, but this elimination can be achieved in an enantioselective fashion.
Collapse
Affiliation(s)
- Thomas J O'Connor
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Binh Khanh Mai
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jordan Nafie
- BioTools, Inc., 17546 Bee Line Highway, Jupiter, Florida 33458, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - F Dean Toste
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| |
Collapse
|
16
|
Gao Y, Yazdani S, Kendrick A, Junor GP, Kang T, Grotjahn DB, Bertrand G, Jazzar R, Engle KM. Cyclic (Alkyl)(amino)carbene Ligands Enable Cu-Catalyzed Markovnikov Protoboration and Protosilylation of Terminal Alkynes: A Versatile Portal to Functionalized Alkenes*. Angew Chem Int Ed Engl 2021; 60:19871-19878. [PMID: 34159696 DOI: 10.1002/anie.202106107] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/11/2021] [Indexed: 12/19/2022]
Abstract
Regioselective hydrofunctionalization of alkynes represents a straightforward route to access alkenyl boronate and silane building blocks. In previously reported catalytic systems, high selectivity is achieved with a limited scope of substrates and/or reagents, with general solutions lacking. Herein, we describe a selective copper-catalyzed Markovnikov hydrofunctionalization of terminal alkynes that is facilitated by strongly donating cyclic (alkyl)(amino)carbene (CAAC) ligands. Using this method, both alkyl- and aryl-substituted alkynes are coupled with a variety of boryl and silyl reagents with high α-selectivity. The reaction is scalable, and the products are versatile intermediates that can participate in various downstream transformations. Preliminary mechanistic experiments shed light on the role of CAAC ligands in this process.
Collapse
Affiliation(s)
- Yang Gao
- Department of Chemistry, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, CA, 92037-1000, USA
| | - Sima Yazdani
- Department of Chemistry and Biochemistry, University of California, San Diego, UCSD-CNRS Joint Research Laboratory (IRL 3555), La Jolla, CA, 92093-0358, USA.,Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, CA, 92182-1030, USA
| | - Aaron Kendrick
- Department of Chemistry, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, CA, 92037-1000, USA
| | - Glen P Junor
- Department of Chemistry and Biochemistry, University of California, San Diego, UCSD-CNRS Joint Research Laboratory (IRL 3555), La Jolla, CA, 92093-0358, USA
| | - Taeho Kang
- Department of Chemistry, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, CA, 92037-1000, USA
| | - Douglas B Grotjahn
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, CA, 92182-1030, USA
| | - Guy Bertrand
- Department of Chemistry and Biochemistry, University of California, San Diego, UCSD-CNRS Joint Research Laboratory (IRL 3555), La Jolla, CA, 92093-0358, USA
| | - Rodolphe Jazzar
- Department of Chemistry and Biochemistry, University of California, San Diego, UCSD-CNRS Joint Research Laboratory (IRL 3555), La Jolla, CA, 92093-0358, USA
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, CA, 92037-1000, USA
| |
Collapse
|
17
|
Lainer T, Leypold M, Kugler C, Fischer RC, Haas M. Dodecamethoxyneopentasilane as a New Building Block for Defined Silicon Frameworks. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202001112] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Thomas Lainer
- Institute of Inorganic Chemistry Graz University of Technology Stremayrgasse 9/IV 8010 Graz Austria
| | - Mario Leypold
- Institute of Inorganic Chemistry Graz University of Technology Stremayrgasse 9/IV 8010 Graz Austria
| | - Christoph Kugler
- Institute of Inorganic Chemistry Graz University of Technology Stremayrgasse 9/IV 8010 Graz Austria
| | - Roland C. Fischer
- Institute of Inorganic Chemistry Graz University of Technology Stremayrgasse 9/IV 8010 Graz Austria
| | - Michael Haas
- Institute of Inorganic Chemistry Graz University of Technology Stremayrgasse 9/IV 8010 Graz Austria
| |
Collapse
|
18
|
Feng JJ, Mao W, Zhang L, Oestreich M. Activation of the Si–B interelement bond related to catalysis. Chem Soc Rev 2021; 50:2010-2073. [DOI: 10.1039/d0cs00965b] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Covering the past seven years, this review comprehensively summarises the latest progress in the preparation and application of Si–B reagents, including the discussion of relevant reaction mechanisms.
Collapse
Affiliation(s)
- Jian-Jun Feng
- Institut für Chemie
- Technische Universität Berlin
- 10623 Berlin
- Germany
- College of Chemistry and Chemical Engineering
| | - Wenbin Mao
- Institut für Chemie
- Technische Universität Berlin
- 10623 Berlin
- Germany
| | - Liangliang Zhang
- Institut für Chemie
- Technische Universität Berlin
- 10623 Berlin
- Germany
| | - Martin Oestreich
- Institut für Chemie
- Technische Universität Berlin
- 10623 Berlin
- Germany
| |
Collapse
|
19
|
Verma A, Hossain SKS, Sunkari SS, Reibenspies J, Saha S. Ligand influence versus electronic configuration of d-metal ion in determining the fate of NIR emission from Ln III ions: a case study with Cu II, Ni II and Zn II complexes. NEW J CHEM 2021. [DOI: 10.1039/d0nj04020g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on fifteen lanthanide complexes, where Cu, Ni and Zn ions with a Schiff-base ligand act as an antenna, it is demonstrated that electronic configuration of the d-block metal ion is very crucial for obtaining emission in NIR region.
Collapse
Affiliation(s)
- Abhineet Verma
- Department of Chemistry
- Institute of Science
- Banaras Hindu University
- Varanasi
- India
| | | | - Sailaja S. Sunkari
- Department of Chemistry
- Mahila Maha Vidhyalaya
- Banaras Hindu University
- Varanasi
- India
| | - Joseph Reibenspies
- X-ray Diffraction Laboratory
- Department of Chemistry
- Texas A&M University
- USA
| | - Satyen Saha
- Department of Chemistry
- Institute of Science
- Banaras Hindu University
- Varanasi
- India
| |
Collapse
|
20
|
Kuehn L, Eichhorn AF, Schmidt D, Marder TB, Radius U. NHC-stabilized copper(I) aryl complexes and their transmetalation reaction with aryl halides. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121249] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
21
|
Matavos-Aramyan S, Soukhakian S, Jazebizadeh MH. Mononuclear Cu Complexes Based on Nitrogen Heterocyclic Carbene: A Comprehensive Review. Top Curr Chem (Cham) 2020; 378:39. [PMID: 32367181 DOI: 10.1007/s41061-020-00304-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 04/16/2020] [Indexed: 11/28/2022]
Abstract
During the last decade, organometallic, coordination, and catalytic chemistry of the three-dimensional metals such as copper (Cu) has been greatly affected by the emergence of nitrogen heterocyclic carbene (NHC) complexes. The NHCs, and in particular the mononuclear CuI-based ones, have been proven vastly useful in several applications such as in biosynthesis, catalysis, photochemistry, etc. This review tries to thoroughly describe a series of mononuclear CuI NHC complexes and their subcategories such as heteroleptics, and bidentate and tridentate heteroatom complexes, and give some detailed insights on their development, emergence, and applications. A brief outlook is also disclosed to enable other researchers to further develop a platform for future advances and studies in the field of CuI-based NHCs.
Collapse
Affiliation(s)
- Sina Matavos-Aramyan
- Research and Development Department, Division of Chemistry, Raazi Environmental Protection Foundation, Shiraz, Iran.
| | - Sadaf Soukhakian
- Research and Development Department, Division of Chemistry, Raazi Environmental Protection Foundation, Shiraz, Iran
| | - Mohammad Hossein Jazebizadeh
- Research and Development Department, Division of Chemistry, Raazi Environmental Protection Foundation, Shiraz, Iran
| |
Collapse
|
22
|
Chapple PM, Kahlal S, Cartron J, Roisnel T, Dorcet V, Cordier M, Saillard J, Carpentier J, Sarazin Y. Bis(imino)carbazolate: A Master Key for Barium Chemistry. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001439] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Samia Kahlal
- Univ Rennes CNRS, ISCR-UMR 6226 35000 Rennes France
| | | | | | | | | | | | | | - Yann Sarazin
- Univ Rennes CNRS, ISCR-UMR 6226 35000 Rennes France
| |
Collapse
|
23
|
Chapple PM, Kahlal S, Cartron J, Roisnel T, Dorcet V, Cordier M, Saillard J, Carpentier J, Sarazin Y. Bis(imino)carbazolate: A Master Key for Barium Chemistry. Angew Chem Int Ed Engl 2020; 59:9120-9126. [DOI: 10.1002/anie.202001439] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Indexed: 01/14/2023]
Affiliation(s)
| | - Samia Kahlal
- Univ Rennes CNRS, ISCR-UMR 6226 35000 Rennes France
| | | | | | | | | | | | | | - Yann Sarazin
- Univ Rennes CNRS, ISCR-UMR 6226 35000 Rennes France
| |
Collapse
|
24
|
Gan Y, Xu W, Liu Y. Ligand-Controlled Regiodivergent Silylation of Allylic Alcohols by Ni/Cu Catalysis for the Synthesis of Functionalized Allylsilanes. Org Lett 2019; 21:9652-9657. [PMID: 31742415 DOI: 10.1021/acs.orglett.9b03822] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yi Gan
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, People’s Republic of China
| | - Wei Xu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, People’s Republic of China
| | - Yuanhong Liu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, People’s Republic of China
| |
Collapse
|
25
|
Wilkinson JR, Nuyen CE, Carpenter TS, Harruff SR, Van Hoveln R. Copper-Catalyzed Carbon–Silicon Bond Formation. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02762] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Jake R. Wilkinson
- Department of Chemistry and Physics, Indiana State University, Terre Haute, Indiana 47809, United States
| | - Courtney E. Nuyen
- Department of Chemistry and Physics, Indiana State University, Terre Haute, Indiana 47809, United States
| | - Trent S. Carpenter
- Department of Chemistry and Physics, Indiana State University, Terre Haute, Indiana 47809, United States
| | - Stephan R. Harruff
- Department of Chemistry and Physics, Indiana State University, Terre Haute, Indiana 47809, United States
| | - Ryan Van Hoveln
- Department of Chemistry and Physics, Indiana State University, Terre Haute, Indiana 47809, United States
| |
Collapse
|
26
|
Paesch AN, Kreyenschmidt AK, Herbst-Irmer R, Stalke D. Side-Arm Functionalized Silylene Copper(I) Complexes in Catalysis. Inorg Chem 2019; 58:7000-7009. [DOI: 10.1021/acs.inorgchem.9b00629] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander N. Paesch
- Institut für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
| | - Anne-Kathrin Kreyenschmidt
- Institut für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
| | - Regine Herbst-Irmer
- Institut für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
| | - Dietmar Stalke
- Institut für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
| |
Collapse
|
27
|
Danopoulos AA, Simler T, Braunstein P. N-Heterocyclic Carbene Complexes of Copper, Nickel, and Cobalt. Chem Rev 2019; 119:3730-3961. [PMID: 30843688 DOI: 10.1021/acs.chemrev.8b00505] [Citation(s) in RCA: 269] [Impact Index Per Article: 53.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The emergence of N-heterocyclic carbenes as ligands across the Periodic Table had an impact on various aspects of the coordination, organometallic, and catalytic chemistry of the 3d metals, including Cu, Ni, and Co, both from the fundamental viewpoint but also in applications, including catalysis, photophysics, bioorganometallic chemistry, materials, etc. In this review, the emergence, development, and state of the art in these three areas are described in detail.
Collapse
Affiliation(s)
- Andreas A Danopoulos
- Laboratory of Inorganic Chemistry , National and Kapodistrian University of Athens , Panepistimiopolis Zografou , Athens GR 15771 , Greece.,Université de Strasbourg, CNRS, Institut de Chimie UMR 7177 , Laboratoire de Chimie de Coordination , Strasbourg 67081 Cedex , France
| | - Thomas Simler
- Université de Strasbourg, CNRS, Institut de Chimie UMR 7177 , Laboratoire de Chimie de Coordination , Strasbourg 67081 Cedex , France
| | - Pierre Braunstein
- Université de Strasbourg, CNRS, Institut de Chimie UMR 7177 , Laboratoire de Chimie de Coordination , Strasbourg 67081 Cedex , France
| |
Collapse
|
28
|
Kuehn L, Eichhorn AF, Marder TB, Radius U. Copper(I) complexes of N-alkyl-substituted N-Heterocyclic carbenes. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2018.11.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
29
|
Stollenz M. Linear Copper Complex Arrays as Versatile Molecular Strings: Syntheses, Structures, Luminescence, and Magnetism. Chemistry 2019; 25:4274-4298. [PMID: 30357943 DOI: 10.1002/chem.201803914] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Indexed: 01/04/2023]
Abstract
The defined linear arrangement of metal atoms in discrete coordination complexes or polymers is still one of the most intriguing challenges in synthetic chemistry. These chain arrangements are of fundamental importance, because of their potential applications as molecular wires and single molecule magnets (SMM) in microelectronic devices on a molecular scale. Oligonuclear Group 11 metal complexes with suitable bridging ligands, specifically those that are based on copper as the first choice of a cheap precursor coinage metal, are of particular interest in this regard. This is due to the superior luminescence properties of these linear clusters that often show d10 ⋅⋅⋅d10 interactions in their molecular structures. The combination of CuI with heavier coinage metal ions results in tunable emissive arrays that are also stimuli-responsive. Thus, both linear multinuclear CuI and linear heteropolymetallic CuI /AgI as well as CuI /AuI clusters are excellent candidates for applications in molecular/organic light-emitting devices (OLEDs). Alternatively, paramagnetic multinuclear cupric arrays are prominent as potential molecular wires with enhanced magnetic properties through multiple coupled d9 centers. This Review covers the whole range of linear multinuclear assemblies of cuprous and cupric ions in complexes and coordination polymers, their syntheses, photophysical behavior, and magnetic properties. Moreover, recent advances in the rapidly progressing field of hetero-CuI /AgI and CuI /AuI molecular strings are also discussed.
Collapse
Affiliation(s)
- Michael Stollenz
- Department of Chemistry and Biochemistry, Kennesaw State University, 370 Paulding Avenue NW, MD#1203, Kennesaw, GA, 30144, USA
| |
Collapse
|
30
|
Shieh M, Liu YH, Wang CC, Jian SH, Lin CN, Chen YM, Huang CY. A comparative study on NHC-functionalized ternary Se/Te–Fe–Cu compounds: synthesis, catalysis, and the effect of chalcogens. NEW J CHEM 2019. [DOI: 10.1039/c9nj02051a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel family of highly efficient Se–Fe–Cu–NHC catalysts was synthesized, which were suitable models for the study of the chalcogen effect.
Collapse
Affiliation(s)
- Minghuey Shieh
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| | - Yu-Hsin Liu
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| | - Chih-Chin Wang
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| | - Si-Huan Jian
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| | - Chien-Nan Lin
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| | - Yen-Ming Chen
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| | - Chung-Yi Huang
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| |
Collapse
|
31
|
Kleeberg C, Borner C. Syntheses, Structures, and Reactivity of NHC Copper(I) Boryl Complexes: A Systematic Study. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00672] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christian Kleeberg
- Institut für Anorganische und Analytische Chemie, Technische Universität Carolo-Wilhelmina zu Braunschweig, 38106 Braunschweig, Germany
| | - Corinna Borner
- Institut für Anorganische und Analytische Chemie, Technische Universität Carolo-Wilhelmina zu Braunschweig, 38106 Braunschweig, Germany
| |
Collapse
|
32
|
|
33
|
Kleeberg C, Plotzitzka J. A Solid in Disguise: Structure Determinations, Polymorphism, and Thermal Behavior of the Silyborane pinB-SiMe2
Ph. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Christian Kleeberg
- Institut für Anorganische und Analytische Chemie; Technische Universität Carolo-Wilhemina zu Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Jacqueline Plotzitzka
- Institut für Anorganische und Analytische Chemie; Technische Universität Carolo-Wilhemina zu Braunschweig; Hagenring 30 38106 Braunschweig Germany
| |
Collapse
|
34
|
Geringer E, Dehnen S. [(PPh3
)4
Pt2
S2
(SnCl)]+
: A Pt-Sn-S Cluster with a Ternary Trigonal Bipyramidal Cluster Core. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800220] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Eugenie Geringer
- Fachbereich Chemie und Wissenschaftliches Zentrum für Materialwissenschaften (WZMW); Philipps-Universität Marburg; Hans-Meerwein-Str. 4 35043 Marburg Germany
| | - Stefanie Dehnen
- Fachbereich Chemie und Wissenschaftliches Zentrum für Materialwissenschaften (WZMW); Philipps-Universität Marburg; Hans-Meerwein-Str. 4 35043 Marburg Germany
| |
Collapse
|
35
|
Jin L, Hao W, Xu J, Sun N, Hu B, Shen Z, Mo W, Hu X. N-Heterocyclic carbene copper-catalyzed direct alkylation of terminal alkynes with non-activated alkyl triflates. Chem Commun (Camb) 2018; 53:4124-4127. [PMID: 28352858 DOI: 10.1039/c7cc00891k] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
(NHC)-Cu-catalyzed C(sp)-C(sp3) bond formation has been successfully achieved under mild conditions. Nonactivated alkyl triflates, which could be easily derived from alcohols, were utilized as C-O electrophiles. Mechanistic studies suggested that copper acetylide was the active species. Scale-up reactions further demonstrated the practicality and efficiency of the developed strategy.
Collapse
Affiliation(s)
- Liqun Jin
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P. R. China. and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, the Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Wangfang Hao
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P. R. China.
| | - Jianeng Xu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P. R. China.
| | - Nan Sun
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P. R. China.
| | - Baoxiang Hu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P. R. China.
| | - Zhenlu Shen
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P. R. China.
| | - Weimin Mo
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P. R. China.
| | - Xinquan Hu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, P. R. China. and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, the Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| |
Collapse
|
36
|
Fujihara T, Tsuji Y. Cu-catalyzed Transformations of Allenes: Use of in-situ Generated Allyl Copper Intermediates in Organic Synthesis. J SYN ORG CHEM JPN 2018. [DOI: 10.5059/yukigoseikyokaishi.76.336] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
37
|
|
38
|
Borner C, Anders L, Brandhorst K, Kleeberg C. Elusive Phosphine Copper(I) Boryl Complexes: Synthesis, Structures, and Reactivity. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00775] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Corinna Borner
- Institut für Anorganische
und Analytische Chemie, Technische Universität Carolo-Wilhelmina zu Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Lisa Anders
- Institut für Anorganische
und Analytische Chemie, Technische Universität Carolo-Wilhelmina zu Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Kai Brandhorst
- Institut für Anorganische
und Analytische Chemie, Technische Universität Carolo-Wilhelmina zu Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Christian Kleeberg
- Institut für Anorganische
und Analytische Chemie, Technische Universität Carolo-Wilhelmina zu Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| |
Collapse
|
39
|
Trose M, Nahra F, Poater A, Cordes DB, Slawin AMZ, Cavallo L, Cazin CSJ. Investigating the Structure and Reactivity of Azolyl-Based Copper(I)–NHC Complexes: The Role of the Anionic Ligand. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02737] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael Trose
- EaStCHEM
School of Chemistry, University of St. Andrews, St. Andrews, KY16 9ST, United Kingdom
| | - Fady Nahra
- Centre
for Sustainable Chemistry, Department of Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium
| | - Albert Poater
- King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia
- Institut
de Química Computacional i Catàlisi and Departament
de Química, Universitat de Girona c/Maria Aurèlia Capmany 6, 17003 Girona, Spain
| | - David B. Cordes
- EaStCHEM
School of Chemistry, University of St. Andrews, St. Andrews, KY16 9ST, United Kingdom
| | - Alexandra M. Z. Slawin
- EaStCHEM
School of Chemistry, University of St. Andrews, St. Andrews, KY16 9ST, United Kingdom
| | - Luigi Cavallo
- King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia
| | - Catherine S. J. Cazin
- EaStCHEM
School of Chemistry, University of St. Andrews, St. Andrews, KY16 9ST, United Kingdom
- Centre
for Sustainable Chemistry, Department of Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium
| |
Collapse
|
40
|
Plotzitzka J, Kleeberg C. [(18-C-6)K][(N≡C)Cu I-SiMe 2Ph], a Potassium Silylcyanocuprate as a Catalyst Model for Silylation Reactions with Silylboranes: Syntheses, Structures, and Catalytic Properties. Inorg Chem 2017; 56:6671-6680. [PMID: 28509537 DOI: 10.1021/acs.inorgchem.7b00749] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
CuI-catalyzed silylation reactions involving silylboranes (in particular, pinB-SiMe2Ph (1)) as silyl sources have recently gained considerable attention. One of the most efficient and versatile and yet simplest catalyst systems consists of CuCN/NaOMe; however, nothing is known about the catalytically relevant species. Using an NHC-based model catalyst, copper silyl complexes of the type [(NHC)Cu-SiMe2Ph] have been established to be crucial species in these catalytic processes. The well-defined and spectroscopically and structurally characterized complex [(18-C-6)K][NC-Cu-OtBu] (2), as a model for the catalytic system, CuCN/NaOMe, shows comparable catalytic activity toward established, exemplary substrates (aldehydes, imines, α,β-unsaturated carbonyls) and in extension allows the efficient silylation of ketones. In addition, a number of peculiarities of the catalytic reaction are readily rationalized on the basis of the mechanistic insight already established using [(NHC)Cu-SiMe2Ph] as a model catalyst. Analogously to the NHC model system, the reaction of 2 with the silylborane 1 furnishes the silylcyanocuprate [(18-C-6)K][NC-Cu-SiMe2Ph] (3) as a potential crucial intermediate in these silylation reactions also suggesting mechanistic similarities between (NHC)Cu- and CuCN/NaOMe-based catalyst systems. Moreover, 3 and [(NHC)Cu-SiMe2Ph] complexes also share structurally distinctive features. In the solid state 3 either exists as a linear, two-coordinated copper complex or, depending on the conditions of crystallization, forms binuclear μ-silyl bridged dimers exhibiting very short Cu···Cu distances. Both structural motifs are also known for [(NHC)Cu-SiR3] complexes. These findings give an initial insight into the versatile structural chemistry of certain silylcyanocuprates; in particular, the finding of dinuclear silylcuprates gives rise to the question whether these dimeric species are of mechanistic relevance for the catalytic processes. However, all peculiarities of the investigated catalytic reaction can readily be rationalized on the basis of the mechanistic details established using (NHC)Cu model complexes.
Collapse
Affiliation(s)
- Jacqueline Plotzitzka
- Institut für Anorganische und Analytische Chemie, Technische Universität Carolo-Wilhelmina zu Braunschweig , Hagenring 30, 38106 Braunschweig, Germany
| | - Christian Kleeberg
- Institut für Anorganische und Analytische Chemie, Technische Universität Carolo-Wilhelmina zu Braunschweig , Hagenring 30, 38106 Braunschweig, Germany
| |
Collapse
|
41
|
Synthesis, structures and properties of three copper complexes with dibutyldithiocarbamate ligand. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.01.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|