1
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Chen W, Hu H, Feng J, Zhu L, Wu D. Synthetic, structural and reactivity studies of a boryl-ethynyl Silylene. Chem Commun (Camb) 2024; 60:5828-5831. [PMID: 38747249 DOI: 10.1039/d4cc00922c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
The salt metathesis of a boryl-ethynyl lithium salt {[(HCDipN)2]B-CC-Li} with a monochlorosilylene [LSi(:)Cl; L = PhC(NtBu)2] produced an isolable boryl-ethynyl silylene {1; [(HCDipN)2]B-CC-Si(L)}. The Si(II) center in 1 possesses a nonbonding lone pair and forms a covalent bond with the ethynyl group. The characterization of 1 was carried out by multinuclear NMR spectroscopy, single-crystal X-ray structure analysis and DFT calculations. Additionally, a reactivity study of 1 was conducted towards oxygen-containing and aryl C-F substrates.
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Affiliation(s)
- Wenhao Chen
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, China.
| | - Haisheng Hu
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, China.
| | - Jie Feng
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, China.
| | - Lei Zhu
- School of Chemistry and Materials Science, Hubei Key Laboratory of Quality Control of Characteristic Fruits And Vegetables, Hubei Engineering University, Xiaogan, 432000, China.
| | - Di Wu
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, China.
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2
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Trifonov AL, Dilman AD. gem-Difluoroolefination of Amides. Chemistry 2023:e202303144. [PMID: 37815941 DOI: 10.1002/chem.202303144] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 10/10/2023] [Accepted: 10/10/2023] [Indexed: 10/12/2023]
Abstract
A metal-free one-pot process for the gem-difluoroolefination of amides is described. The reaction is based on interaction of generated in situ α-chloroiminium salts with difluorinated phosphorus ylide formed from difluorocarbene and triphenylphosphine. The olefination involves nucleophile-assisted dephosphorylation and proceeds within one hour at low temperature. The gem-difluoroenamines were used in further transformations leading to a variety of fluoroalkylated amines.
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Affiliation(s)
- Alexey L Trifonov
- N. D. Zelinsky Institute of Organic Chemistry, 119991, Moscow, Leninsky prosp. 47, Russian Federation
| | - Alexander D Dilman
- N. D. Zelinsky Institute of Organic Chemistry, 119991, Moscow, Leninsky prosp. 47, Russian Federation
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3
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Abstract
AbstractThe unique properties of fluorine-containing organic compounds make fluorine substitution attractive for the development of pharmaceuticals and various specialty materials, which have inspired the evolution of diverse C-F bond activation techniques. Although many advances have been made in functionalizations of activated C-F bonds utilizing transition metal complexes, there are fewer approaches available for nonactivated C-F bonds due to the difficulty in oxidative addition of transition metals to the inert C-F bonds. In this regard, using Lewis acid to abstract the fluoride and light/radical initiator to generate the radical intermediate have emerged as powerful tools for activating those inert C-F bonds. Meanwhile, these transition-metal-free processes are greener, economical, and for the pharmaceutical industry, without heavy metal residues. This review provides an overview of recent C-F bond activations and functionalizations under transition-metal-free conditions. The key mechanisms involved are demonstrated and discussed in detail. Finally, a brief discussion on the existing limitations of this field and our perspective are presented.
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4
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Kundu G, Ajithkumar VS, Bisai MK, Tothadi S, Das T, Vanka K, Sen SS. Diverse reactivity of carbenes and silylenes towards fluoropyridines. Chem Commun (Camb) 2021; 57:4428-4431. [PMID: 33949460 DOI: 10.1039/d1cc01401c] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of IDipp with C5F5N led to functionalization of all three carbon atoms of the imidazole ring with HF2- as the counter-anion (1). Reactivity with 2,3,5,6-tetrafluoropyridine gives only C-F bond activation leaving C-H bonds intact (5b). The reaction of SIDipp with C5F5N in the presence of BF3 afforded the ring cleavage product (3). Analogous reactions with silylene led to oxidative addition at the Si(ii) center.
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Affiliation(s)
- Gargi Kundu
- Inorganic Chemistry and Catalysis Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pashan, Pune 411008, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - V S Ajithkumar
- Inorganic Chemistry and Catalysis Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pashan, Pune 411008, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Milan Kumar Bisai
- Inorganic Chemistry and Catalysis Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pashan, Pune 411008, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Srinu Tothadi
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pashan, Pune 411008, India
| | - Tamal Das
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India and Physical and Material Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pashan, Pune 411008, India
| | - Kumar Vanka
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India and Physical and Material Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pashan, Pune 411008, India
| | - Sakya S Sen
- Inorganic Chemistry and Catalysis Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pashan, Pune 411008, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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5
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Mandal D, Chandra S, Neuman NI, Mahata A, Sarkar A, Kundu A, Anga S, Rawat H, Schulzke C, Mote KR, Sarkar B, Chandrasekhar V, Jana A. Activation of Aromatic C-F Bonds by a N-Heterocyclic Olefin (NHO). Chemistry 2020; 26:5951-5955. [PMID: 32027063 PMCID: PMC7317942 DOI: 10.1002/chem.202000276] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Indexed: 11/09/2022]
Abstract
A N-heterocyclic olefin (NHO), a terminal alkene selectively activates aromatic C-F bonds without the need of any additional catalyst. As a result, a straightforward methodology was developed for the formation of different fluoroaryl-substituted alkenes in which the central carbon-carbon double bond is in a twisted geometry.
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Affiliation(s)
- Debdeep Mandal
- Tata Institute of Fundamental Research HyderabadGopanpally, Hyderabad500107India
| | - Shubhadeep Chandra
- Institut für Chemie und BiochemieAnorganische ChemieFreie Universität BerlinFabeckstrasse 34–3614195BerlinGermany
- Institut für Anorganische ChemieLehrstuhl für Anorganische KoordinationschemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Nicolás I. Neuman
- Institut für Chemie und BiochemieAnorganische ChemieFreie Universität BerlinFabeckstrasse 34–3614195BerlinGermany
- Instituto de Desarrollo Tecnológico para la Industria QuímicaCCT Santa Fe CONICET-UNLColectora Ruta Nacional 168, Km 472, Paraje El Pozo3000Santa FeArgentina
| | - Alok Mahata
- Tata Institute of Fundamental Research HyderabadGopanpally, Hyderabad500107India
| | - Arighna Sarkar
- Tata Institute of Fundamental Research HyderabadGopanpally, Hyderabad500107India
| | - Abhinanda Kundu
- Tata Institute of Fundamental Research HyderabadGopanpally, Hyderabad500107India
| | - Srinivas Anga
- Tata Institute of Fundamental Research HyderabadGopanpally, Hyderabad500107India
| | - Hemant Rawat
- Tata Institute of Fundamental Research HyderabadGopanpally, Hyderabad500107India
| | - Carola Schulzke
- Institut für BiochemieUniversität GreifswaldFelix-Hausdorff-Strasse 417487GreifswaldGermany
| | - Kaustubh R. Mote
- Tata Institute of Fundamental Research HyderabadGopanpally, Hyderabad500107India
| | - Biprajit Sarkar
- Institut für Chemie und BiochemieAnorganische ChemieFreie Universität BerlinFabeckstrasse 34–3614195BerlinGermany
- Institut für Anorganische ChemieLehrstuhl für Anorganische KoordinationschemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Vadapalli Chandrasekhar
- Tata Institute of Fundamental Research HyderabadGopanpally, Hyderabad500107India
- Department of ChemistryIndian Institute of Technology KanpurKanpur208016India
| | - Anukul Jana
- Tata Institute of Fundamental Research HyderabadGopanpally, Hyderabad500107India
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6
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Lee E, Pietrasiak E. Activation of C–F, Si–F, and S–F Bonds by N-Heterocyclic Carbenes and Their Isoelectronic Analogues. Synlett 2020. [DOI: 10.1055/s-0040-1707106] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Reactions involving C–F, Si–F, and S–F bond cleavage with N-heterocyclic carbenes and isoelectronic species are reviewed. Most examples involve activation of aromatic C–F bond via an SNAr pathway and nucleophilic substitution of fluorine in electron-deficient olefins. The mechanism of the C–F bond activation depends on the reaction partners and the reaction can proceed via addition–elimination, oxidative addition (concerted or stepwise) or metathesis. The adducts formed upon substitution find applications in organic synthesis, as ligands and as stable radical precursors, but in most cases, their full potential remains unexplored.1 Introduction1.1 The C–F Bond1.2 C–F Bond Activation: A Short Summary1.3 C–F Bond Activation: A Special Case of SNAr1.4 N-Heterocyclic Carbenes (NHCs)1.5 The Purpose of this Article2 C–F bond Activation in Acyl Fluorides3 Activation of Vinylic C–F Bonds4 Activation of Aromatic C–F Bonds5 X–F Bond Activation (X = S or Si)6 C–F Bond Activation by Main Group Compounds Isoelectronic with NHCs7 Conclusions and Outlook
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Affiliation(s)
- Eunsung Lee
- Department of Chemistry, Pohang University of Science and Technology
- Division of Advanced Materials Science, Pohang University of Science and Technology
| | - Ewa Pietrasiak
- Department of Chemistry, Pohang University of Science and Technology
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7
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Pait M, Kundu G, Tothadi S, Karak S, Jain S, Vanka K, Sen SS. C−F Bond Activation by a Saturated N‐Heterocyclic Carbene: Mesoionic Compound Formation and Adduct Formation with B(C
6
F
5
)
3. Angew Chem Int Ed Engl 2019; 58:2804-2808. [DOI: 10.1002/anie.201814616] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Moumita Pait
- Inorganic Chemistry and Catalysis DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - Gargi Kundu
- Inorganic Chemistry and Catalysis DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Srinu Tothadi
- Organic Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - Suvendu Karak
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
- Physical and Material Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - Shailja Jain
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
- Physical and Material Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - Kumar Vanka
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
- Physical and Material Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - Sakya S. Sen
- Inorganic Chemistry and Catalysis DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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8
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Pait M, Kundu G, Tothadi S, Karak S, Jain S, Vanka K, Sen SS. C−F Bond Activation by a Saturated N‐Heterocyclic Carbene: Mesoionic Compound Formation and Adduct Formation with B(C
6
F
5
)
3. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814616] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Moumita Pait
- Inorganic Chemistry and Catalysis DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - Gargi Kundu
- Inorganic Chemistry and Catalysis DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Srinu Tothadi
- Organic Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - Suvendu Karak
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
- Physical and Material Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - Shailja Jain
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
- Physical and Material Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - Kumar Vanka
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
- Physical and Material Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - Sakya S. Sen
- Inorganic Chemistry and Catalysis DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pashan Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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9
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Swamy VSVSN, Raj KV, Vanka K, Sen SS, Roesky HW. Silylene induced cooperative B–H bond activation and unprecedented aldehyde C–H bond splitting with amidinate ring expansion. Chem Commun (Camb) 2019; 55:3536-3539. [DOI: 10.1039/c9cc00296k] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silylene mediated B–H and aldehyde C–H bond splitting were realized under ambient conditions.
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Affiliation(s)
- V. S. V. S. N. Swamy
- Inorganic Chemistry and Catalysis Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - K. Vipin Raj
- Academy of Scientific and Innovative Research (AcSIR)
- Ghaziabad-201002
- India
- Physical and Material Chemistry Division
- CSIR-National Chemical Laboratory
| | - Kumar Vanka
- Academy of Scientific and Innovative Research (AcSIR)
- Ghaziabad-201002
- India
- Physical and Material Chemistry Division
- CSIR-National Chemical Laboratory
| | - Sakya S. Sen
- Inorganic Chemistry and Catalysis Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Herbert W. Roesky
- Institute of Inorganic Chemistry
- Georg-August University
- Göttingen
- Germany
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10
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Zhang W, Dodonov VA, Chen W, Zhao Y, Skatova AA, Fedushkin IL, Roesky PW, Wu B, Yang XJ. Cycloaddition versus Cleavage of the C=S Bond of Isothiocyanates Promoted by Digallane Compounds with Noninnocent α-Diimine Ligands. Chemistry 2018; 24:14994-15002. [PMID: 30016556 DOI: 10.1002/chem.201802469] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 07/02/2018] [Indexed: 11/11/2022]
Abstract
Whereas the chemistry of single-bond activation by compounds of the main group elements has undergone some development in recent years, the cleavage of multiple bonds remains underexplored. Herein, the reactions of two digallanes bearing α-diimine ligands, namely, [L1 Ga-GaL1 ] (1, L1 =dpp-dad=[(2,6-iPr2 C6 H3 )NC(CH3 )]2 ) and [L2 Ga-GaL2 ] (2, L2 =dpp-bian=1,2-[(2,6-iPr2 C6 H3 )NC]2 C10 H6 ), with isothiocyanates are reported. Reactions of 1 or 2 with isothiocyanates in 1:2 molar ratio proceeded with [2+4] cycloaddition of the C=S bond across the C2 N2 Ga metallacycle with formation of C-C and S-Ga single bonds to afford [L1 (RN=C-S)Ga-Ga(S-C=NR)L1 ] (3, R=Me; 4, R=Ph) and [L2 (RN=C-S)Ga-Ga(S-C=NR)L2 ] (8, R=allyl; 9, R=Ph). In the cases of 8 and 9, this cycloaddition is reversible. The digallanes reacted with 2 equiv of PhNCS in the presence of Na metal or at high temperatures through a unique reductive cleavage of the C=S bond to yield the disulfide-bridged digallium species [Na(THF)3 ]2 [L1 Ga(μ-S)2 GaL1 ] (5), [L2 Ga(μ-S)2 GaL2 ] (10), and [Na(DME)3 ][L2 Ga(μ-S)2 GaL2 ] (11). Moreover, products 4 and 5 can further react with an excess of isothiocyanate, through cleavage of the C=S bond or cycloaddition, to give the bis- or mono-S-bridged complexes [Na(THF)2 ]2 [L1 (PhN=C-S)Ga(μ-S)2 Ga(S-C=NPh)L1 ] (6) and [L1 (PhN=C-S)Ga(μ-S)Ga(S-C=NPh)L1 ] (7). All the newly prepared compounds were characterized by elemental analysis, single-crystal X-ray diffraction, IR spectroscopy, NMR (3-9) or ESR spectroscopy (11), and DFT calculations.
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Affiliation(s)
- Wei Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of, the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, P. R. China
| | - Vladimir A Dodonov
- G. A. Razuvaev Institute of Organometallic Chemistry of, Russian Academy of Sciences, Tropinina str. 49, Nizhny Novgorod, 603137, Russia.,Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76131, Karlsruhe, Germany
| | - Weixing Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of, the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, P. R. China
| | - Yanxia Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of, the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, P. R. China
| | - Alexandra A Skatova
- G. A. Razuvaev Institute of Organometallic Chemistry of, Russian Academy of Sciences, Tropinina str. 49, Nizhny Novgorod, 603137, Russia
| | - Igor L Fedushkin
- G. A. Razuvaev Institute of Organometallic Chemistry of, Russian Academy of Sciences, Tropinina str. 49, Nizhny Novgorod, 603137, Russia
| | - Peter W Roesky
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76131, Karlsruhe, Germany
| | - Biao Wu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of, the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, P. R. China
| | - Xiao-Juan Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of, the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, P. R. China
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11
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Chu T, Nikonov GI. Oxidative Addition and Reductive Elimination at Main-Group Element Centers. Chem Rev 2018; 118:3608-3680. [DOI: 10.1021/acs.chemrev.7b00572] [Citation(s) in RCA: 342] [Impact Index Per Article: 57.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Terry Chu
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario L2S 3A1, Canada
| | - Georgii I. Nikonov
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario L2S 3A1, Canada
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12
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Sen SS, Roesky HW. Silicon-fluorine chemistry: from the preparation of SiF2to C–F bond activation using silylenes and its heavier congeners. Chem Commun (Camb) 2018; 54:5046-5057. [DOI: 10.1039/c8cc01816b] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The feisty nature of silicon(ii) fluorides has been harnessed by two cyclic alkyl amino carbene (cAAC) ligands and (cAAC)2SiF2has been isolated at room temperature and structurally characterized.
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Affiliation(s)
- Sakya S. Sen
- Inorganic Chemistry and Catalysis Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - Herbert W. Roesky
- Institute of Inorganic Chemistry
- Georg-August University
- Goettingen
- Germany
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13
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Chu T, Vyboishchikov SF, Gabidullin BM, Nikonov GI. Oxidative Cleavage of the C═N Bond on Al(I). J Am Chem Soc 2017; 139:8804-8807. [DOI: 10.1021/jacs.7b04841] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Terry Chu
- Department
of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario Canada L2S 3A1
| | - Sergei F. Vyboishchikov
- Institut
de Química Computacional i Catàlisi and Departament
de Química, Universitat de Girona, Carrer Maria Aurèlia Capmany
69, 17003 Girona, Spain
| | - Bulat M. Gabidullin
- X-Ray
Core Facility, Faculty of Science, University of Ottawa, 150 Louis
Pasteur, Ottawa, Ontario, Canada K1N 6N5
| | - Georgii I. Nikonov
- Department
of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario Canada L2S 3A1
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14
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Álvarez-Rodríguez L, Cabeza JA, García-Álvarez P, Gómez-Gallego M, Merinero AD, Sierra MA. First Insertions of Carbene Ligands into Ge-N and Si-N Bonds. Chemistry 2017; 23:4287-4291. [PMID: 28225557 DOI: 10.1002/chem.201700828] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Indexed: 11/10/2022]
Abstract
The insertion of carbene ligands into Ge-N (three examples) and Si-N (one example) bonds has been achieved for the first time by treating Fischer carbene complexes (M=W, Cr) with bulky amidinatotetrylenes (E=Ge, Si). These reactions, which start with a nucleophilic attack of the amidinatotetrylene heavier group 14 atom to the carbene C atom, proceed through a stereoselective insertion of the carbene fragment into an E-N bond of the amidinatotetrylene ENCN four-membered ring, leading to [M(CO)5 L] derivatives in which L belongs to a novel family of tetrylene ligands comprising an ECNCN five-membered ring.
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Affiliation(s)
- Lucía Álvarez-Rodríguez
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain.,Departamento de Química Orgánica e Inorgánica-IUQOEM, Universidad de Oviedo-CSIC, 33071, Oviedo, Spain
| | - Javier A Cabeza
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain.,Departamento de Química Orgánica e Inorgánica-IUQOEM, Universidad de Oviedo-CSIC, 33071, Oviedo, Spain
| | - Pablo García-Álvarez
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain.,Departamento de Química Orgánica e Inorgánica-IUQOEM, Universidad de Oviedo-CSIC, 33071, Oviedo, Spain
| | - Mar Gómez-Gallego
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain.,Departamento de Química Orgánica, Universidad Complutense, 28040, Madrid, Spain
| | - Alba D Merinero
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain.,Departamento de Química Orgánica, Universidad Complutense, 28040, Madrid, Spain
| | - Miguel A Sierra
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain.,Departamento de Química Orgánica, Universidad Complutense, 28040, Madrid, Spain
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15
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Swamy VSVSN, Parvin N, Vipin Raj K, Vanka K, Sen SS. C(sp3)–F, C(sp2)–F and C(sp3)–H bond activation at silicon(ii) centers. Chem Commun (Camb) 2017; 53:9850-9853. [DOI: 10.1039/c7cc05145j] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silylene, [PhC(NtBu)2SiN(SiMe3)2] (1) underwent C(sp3)–F, C(sp2)–F and C(sp3)–H bond activation with trifluoroacetophenone, octafluorotoluene, and acetophenone, respectively, under ambient conditions.
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Affiliation(s)
- V. S. V. S. N. Swamy
- Inorganic Chemistry and Catalysis Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Nasrina Parvin
- Indian Institute of Science Education and Research, Pune
- Pune 411008
- India
| | - K. Vipin Raj
- Academy of Scientific and Innovative Research (AcSIR)
- New Delhi-110020
- India
- Physical and Material Chemistry Division
- CSIR-National Chemical Laboratory
| | - Kumar Vanka
- Academy of Scientific and Innovative Research (AcSIR)
- New Delhi-110020
- India
- Physical and Material Chemistry Division
- CSIR-National Chemical Laboratory
| | - Sakya S. Sen
- Inorganic Chemistry and Catalysis Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
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16
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Chu T, Vyboishchikov SF, Gabidullin B, Nikonov GI. Oxidative Cleavage of C=S and P=S Bonds at an AlI
Center: Preparation of Terminally Bound Aluminum Sulfides. Angew Chem Int Ed Engl 2016; 55:13306-13311. [DOI: 10.1002/anie.201607735] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Terry Chu
- Department of Chemistry; Brock University; 1812 Sir Isaac Brock Way St. Catharines Ontario L2S 3A1 Canada
| | - Sergei F. Vyboishchikov
- Institut de Química Computacional i Catàlisi and Departament de Química; Carrer Maria Aurèlia Capmany 69 17003 Girona Spain
| | - Bulat Gabidullin
- X-Ray Core Facility; Faculty of Science; University of Ottawa; 150 Louis Pasteur Ottawa Ontario K1N 6N5 Canada
| | - Georgii I. Nikonov
- Department of Chemistry; Brock University; 1812 Sir Isaac Brock Way St. Catharines Ontario L2S 3A1 Canada
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17
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Chu T, Vyboishchikov SF, Gabidullin B, Nikonov GI. Oxidative Cleavage of C=S and P=S Bonds at an AlI
Center: Preparation of Terminally Bound Aluminum Sulfides. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607735] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Terry Chu
- Department of Chemistry; Brock University; 1812 Sir Isaac Brock Way St. Catharines Ontario L2S 3A1 Canada
| | - Sergei F. Vyboishchikov
- Institut de Química Computacional i Catàlisi and Departament de Química; Carrer Maria Aurèlia Capmany 69 17003 Girona Spain
| | - Bulat Gabidullin
- X-Ray Core Facility; Faculty of Science; University of Ottawa; 150 Louis Pasteur Ottawa Ontario K1N 6N5 Canada
| | - Georgii I. Nikonov
- Department of Chemistry; Brock University; 1812 Sir Isaac Brock Way St. Catharines Ontario L2S 3A1 Canada
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18
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Bakewell C, White AJP, Crimmin MR. Addition of Carbon-Fluorine Bonds to a Mg(I)-Mg(I) Bond: An Equivalent of Grignard Formation in Solution. J Am Chem Soc 2016; 138:12763-12766. [PMID: 27636244 PMCID: PMC5135227 DOI: 10.1021/jacs.6b08104] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Addition
of the carbon–fluorine bond of a series of perfluorinated
and polyfluorinated arenes across the Mg–Mg bond of a simple
coordination complex proceeds rapidly in solution. The reaction results
in the formation of a new carbon–magnesium bond and a new fluorine–magnesium
bond and is analogous to Grignard formation in homogeneous solution.
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Affiliation(s)
- Clare Bakewell
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, United Kingdom
| | - Andrew J P White
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, United Kingdom
| | - Mark R Crimmin
- Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, United Kingdom
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19
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Turner ZR. Chemically Non-Innocent Cyclic (Alkyl)(Amino)Carbenes: Ligand Rearrangement, C−H and C−F Bond Activation. Chemistry 2016; 22:11461-8. [DOI: 10.1002/chem.201602264] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Zoë R. Turner
- Chemistry Research Laboratory; Department of Chemistry; University of Oxford; Oxford OX1 3TA UK
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20
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Ahrens T, Teltewskoi M, Ahrens M, Braun T, Laubenstein R. Competing reaction pathways of 3,3,3-trifluoropropene at rhodium hydrido, silyl and germyl complexes: C–F bond activation versus hydrogermylation. Dalton Trans 2016; 45:17495-17507. [DOI: 10.1039/c6dt03027k] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity of the Rh complexes [Rh(L)(PEt3)3] (L = H, Si(OEt)3, GePh3) towards CH2CHCF3 was investigated which involve C–F bond activation and germylation reactions.
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Affiliation(s)
- Theresia Ahrens
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Michael Teltewskoi
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Mike Ahrens
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Thomas Braun
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Reik Laubenstein
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
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21
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Chu T, Boyko Y, Korobkov I, Nikonov GI. Transition Metal-like Oxidative Addition of C–F and C–O Bonds to an Aluminum(I) Center. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00793] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Terry Chu
- Department
of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, Canada L2S 3A1
| | - Yaroslav Boyko
- Department
of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, Canada L2S 3A1
| | - Ilia Korobkov
- X-ray
Core Facility, Faculty of Science, University of Ottawa, 150 Louis
Pasteur, Ottawa, Ontario, Canada K1N 6N5
| | - Georgii I. Nikonov
- Department
of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario, Canada L2S 3A1
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22
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Crimmin MR, Butler MJ, White AJP. Oxidative addition of carbon-fluorine and carbon-oxygen bonds to Al(I). Chem Commun (Camb) 2015; 51:15994-6. [PMID: 26389715 PMCID: PMC4621529 DOI: 10.1039/c5cc07140b] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Addition of fluoroarenes, fluoroalkanes or benzofuran to [{(2,6-iPr2C6H3NCMe)2CH}Al] results in facile oxidative addition of either a C–F or C–O bond to the Al(i) centre.
Addition of fluoroarenes, fluoroalkanes or benzofuran to [{(2,6-iPr2C6H3NCMe)2CH}Al] results in facile oxidative addition of either a C–F or C–O bond to the Al(i) centre.
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Affiliation(s)
- Mark R Crimmin
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, UK.
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23
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Đorđević N, Tay MQY, Muthaiah S, Ganguly R, Dimić D, Vidović D. C–F Bond Activation by Transient Phosphenium Dications. Inorg Chem 2015; 54:4180-2. [DOI: 10.1021/ic5031125] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nemanja Đorđević
- SPMS-CBC, Nanyang Technological University, 21 Nanyang Link, Singapore 638737, Singapore
| | - Madelyn Qin Yi Tay
- SPMS-CBC, Nanyang Technological University, 21 Nanyang Link, Singapore 638737, Singapore
| | | | - Rakesh Ganguly
- SPMS-CBC, Nanyang Technological University, 21 Nanyang Link, Singapore 638737, Singapore
| | - Dušan Dimić
- Faculty of Physical Chemistry, University of Belgrade, 11000 Belgrade, Republic of Serbia
| | - Dragoslav Vidović
- SPMS-CBC, Nanyang Technological University, 21 Nanyang Link, Singapore 638737, Singapore
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24
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Ahrens T, Kohlmann J, Ahrens M, Braun T. Functionalization of fluorinated molecules by transition-metal-mediated C-F bond activation to access fluorinated building blocks. Chem Rev 2014; 115:931-72. [PMID: 25347593 DOI: 10.1021/cr500257c] [Citation(s) in RCA: 610] [Impact Index Per Article: 61.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Theresia Ahrens
- Humboldt-Universität zu Berlin , Department of Chemistry, Brook-Taylor-Straße 2, 12489 Berlin, Germany
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25
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Junold K, Sinner K, Baus JA, Burschka C, Fonseca Guerra C, Bickelhaupt FM, Tacke R. Reactions of the Donor-Stabilized Silylene Bis[N,N′-diisopropyl-benzamidinato(−)]silicon(II) with Brønsted Acids. Chemistry 2014; 20:16462-6. [DOI: 10.1002/chem.201404667] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Indexed: 11/10/2022]
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26
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Junold K, Baus JA, Burschka C, Finze M, Tacke R. Selective C-H Bond Activation of 1,2-Dicarba-closo-dodecaborane by the Donor-Stabilized Silylene Bis[N,N′-diisopropylbenzamidinato(-)]silicon(II). Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402685] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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27
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Azhakar R, Ghadwal RS, Roesky HW, Hey J, Krause L, Stalke D. Mixed valence η6-arene cobalt(I) and cobalt(II) compound. Dalton Trans 2014; 42:10277-81. [PMID: 23732516 DOI: 10.1039/c3dt50939g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first carbonyl free mixed valence cobalt(I)/cobalt(II) compound [2{L2Co(I)(η(6)-C7H8)}](2+) [Co(II)2Cl6](2-) (1) [L = PhC(N(t)Bu)2SiCl] was obtained by the reaction of four equivalents of anhydrous CoCl2 with five equivalents of N-heterocyclic chlorosilylene L. In contrast, the reaction of L with CoBr2 yielded [L2CoBr2] (2). Compound 1 was formed by the cleavage of Co-Cl bonds, the reduction of Co(II) to Co(I) and by the coordination of a toluene molecule. The chlorosilylene (L) functions as a reducing agent as well as a neutral σ-donor ligand. The toluene molecule coordinates to the Co(I) atom in an η(6)-fashion.
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Affiliation(s)
- Ramachandran Azhakar
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
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28
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Champagne PA, Saint-Martin A, Drouin M, Paquin JF. Triol-promoted activation of C-F bonds: Amination of benzylic fluorides under highly concentrated conditions mediated by 1,1,1-tris(hydroxymethyl)propane. Beilstein J Org Chem 2013; 9:2451-6. [PMID: 24367412 PMCID: PMC3869259 DOI: 10.3762/bjoc.9.283] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Accepted: 10/17/2013] [Indexed: 11/23/2022] Open
Abstract
Activation of the C-F bond of benzylic fluorides was achieved using 1,1,1-tris(hydroxymethyl)propane (2) as a hydrogen bond-donating agent. Investigations demonstrated that hydrogen bond-donating solvents are promoting the activation and hydrogen bond-accepting ones are hindering it. However, the reaction is best run under highly concentrated conditions, where solvents cannot interfere with the interaction between the organofluorine compound and the triol. Various benzylic fluorides react with secondary amines or anilines to form benzylic amines in good yields.
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Affiliation(s)
- Pier Alexandre Champagne
- Canada Research Chair in Organic and Medicinal Chemistry, CCVC, PROTEO, Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, Canada G1V 0A6
| | - Alexandre Saint-Martin
- Canada Research Chair in Organic and Medicinal Chemistry, CCVC, PROTEO, Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, Canada G1V 0A6
| | - Mélina Drouin
- Canada Research Chair in Organic and Medicinal Chemistry, CCVC, PROTEO, Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, Canada G1V 0A6
| | - Jean-François Paquin
- Canada Research Chair in Organic and Medicinal Chemistry, CCVC, PROTEO, Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, Canada G1V 0A6
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29
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Affiliation(s)
- Timo Stahl
- 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
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30
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Gianetti TL, Bergman RG, Arnold J. Dis-assembly of a Benzylic CF3 Group Mediated by a Niobium(III) Imido Complex. J Am Chem Soc 2013; 135:8145-8. [DOI: 10.1021/ja4033007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thomas L. Gianetti
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Robert G. Bergman
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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31
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Azhakar R, Roesky HW, Wolf H, Stalke D. On the Reactivity of the Silylene PhC(NtBu)2SiNPh2toward Organic Substrates. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300138] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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32
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Azhakar R, Roesky HW, Holstein JJ, Dittrich B. Reaction of the Silylene PhC(N
t
Bu)
2
Si
t
Bu with 4,4′‐Bis(dimethylamino)thiobenzophenone and Treatment of the Silylene PhC(N
t
Bu)
2
SiC(SiMe
3
)
3
with 3,5‐Di‐
tert
‐butyl‐
o
‐benzoquinone. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300085] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ramachandran Azhakar
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany, http://www.uni‐goettingen.de/en/46240.html http://www.uni‐goettingen.de/de/71797.html
| | - Herbert W. Roesky
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany, http://www.uni‐goettingen.de/en/46240.html http://www.uni‐goettingen.de/de/71797.html
| | - Julian J. Holstein
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany, http://www.uni‐goettingen.de/en/46240.html http://www.uni‐goettingen.de/de/71797.html
| | - Birger Dittrich
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg Martin‐Luther‐King‐Platz 6, 20146 Hamburg, Germany
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