151
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Luo X, Li W, Lu H, Deng G, Yang Y, Yang C, Liang Y. Palladium-catalyzed cascade synthesis of spirocyclic oxindoles via regioselective C2-H arylation and C8-H alkylation of naphthalene ring. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.07.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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152
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Schneider JE, Goetz MK, Anderson JS. Statistical analysis of C-H activation by oxo complexes supports diverse thermodynamic control over reactivity. Chem Sci 2021; 12:4173-4183. [PMID: 34163690 PMCID: PMC8179456 DOI: 10.1039/d0sc06058e] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 01/28/2021] [Indexed: 01/29/2023] Open
Abstract
Transition metal oxo species are key intermediates for the activation of strong C-H bonds. As such, there has been interest in understanding which structural or electronic parameters of metal oxo complexes determine their reactivity. Factors such as ground state thermodynamics, spin state, steric environment, oxygen radical character, and asynchronicity have all been cited as key contributors, yet there is no consensus on when each of these parameters is significant or the relative magnitude of their effects. Herein, we present a thorough statistical analysis of parameters that have been proposed to influence transition metal oxo mediated C-H activation. We used density functional theory (DFT) to compute parameters for transition metal oxo complexes and analyzed their ability to explain and predict an extensive data set of experimentally determined reaction barriers. We found that, in general, only thermodynamic parameters play a statistically significant role. Notably, however, there are independent and significant contributions from the oxidation potential and basicity of the oxo complexes which suggest a more complicated thermodynamic picture than what has been shown previously.
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Affiliation(s)
| | - McKenna K Goetz
- Department of Chemistry, University of Chicago Chicago IL 60637 USA
| | - John S Anderson
- Department of Chemistry, University of Chicago Chicago IL 60637 USA
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153
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Wei N, Yang D, Zhang Y, Wang B, Qu J. Synthesis, Structure, and Oxidative Reactivity of a Class of Thiolate‐Bridged Dichromium Complexes Featuring Antiferromagnetic Coupling Interactions. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202001050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nianmin Wei
- State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116024 P. R. China
| | - Dawei Yang
- State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116024 P. R. China
| | - Yixin Zhang
- State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116024 P. R. China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116024 P. R. China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116024 P. R. China
- Key Laboratory for Advanced Materials Shanghai 200237 P. R. China
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154
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Gandon V, Hoarau C. Concerted vs Nonconcerted Metalation-Deprotonation in Orthogonal Direct C-H Arylation of Heterocycles with Halides: A Computational Study. J Org Chem 2021; 86:1769-1778. [PMID: 33406843 DOI: 10.1021/acs.joc.0c02604] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A computational study on the base-assisted orthogonal C-H arylation of azoles with halides is reported. Although concerted metalation-deprotonation (CMD) is favored under acetate assistance at the C5 site that displays the best balance of nucleophilic and acidic character, the most acidic C2 site may be selectively targeted under carbonate assistance by taking advantage of a carbanionic-type (or non-concerted) metalation-deprotonation mechanism (nCMD). For the latter, several experimental probes including base, ligand, and solvent effects have been collected in favor of an outer-sphere deprotonation process after the formation of a [(Ln)(N1-heteroaryl)PdArX] complex. However, no computational analysis of this fundamental elementary step has been so far provided. We have carried out a series of density functional theory (DFT) calculations that delineate the structural and energetic aspects of the nCMD pathway. Starting with the oxa(thia)zole-4-carboxylates selected in our group to engineer the competitive C2 vs C5 arylation in azoles, we show that the energy barrier of the C2 anion generation is lying unexpectedly lower than the prior heterocycle coordination to Pd that is eventually identified as the rate-determining step. These calculations provide satisfactory explanations for the experimental observations of the divergence between nCMD and CMD reactivity, and notably a lower barrier at the C2 site for the nCMD process. On the other hand, the nCMD process is ineffective at the C5 site. Evaluation of various azoles reveals that the nCMD mechanism at C2 is viable from the most acidic (benzo)oxazoles to moderately acidic (benzo)thiazoles, as well as weakly acidic imidazoles. In all cases, in accordance with previously reported experimental data in orthogonal direct C-H arylation of azoles, the nCMD route is found energetically competitive to the CMD one at C5 for all azoles, except for imidazole which needs stronger basic conditions than simple carbonate assistance. Additionally, the acetate ligand, which is the base of choice for CMD, was found inefficient for nCMD and the comparative performance of acetate vs carbonate to assist CMD in the azole series reveals also considerable changes from electronically close but environmentally divergent C5-H vs C2-H bonds.
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Affiliation(s)
- Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Université Paris-Saclay, Bâtiment 420, 91405 Orsay cedex, France.,Laboratoire de Chimie Moléculaire (LCM), CNRS UMR 9168, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau cedex, France
| | - Christophe Hoarau
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, COBRA (UMR 6014), 76000 Rouen, France
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155
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Abstract
Metal-catalyzed activations of inert sp3C–H bonds have recently brought a revolution in the synthesis of useful molecules and molecular materials, due to the interest of the formed sp3C–SiR3 silanes, stable organometallic species, and for further functionalizations that sp3C–H bonds cannot reach directly.
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Affiliation(s)
- Bin Li
- School of Biotechnology and Health Sciences
- Wuyi University
- Jiangmen 529020
- P. R. China
| | - Pierre H. Dixneuf
- Univ. Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226
- F-35000 Rennes
- France
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156
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Zhou J, Cheng C, Lin Z, Ren Q, Xu N, Lin J, Qin Y, Li J. δ-Regioselective heteroarylation of free alcohols through 1,5-hydrogen-atom transfer. Org Chem Front 2021. [DOI: 10.1039/d0qo01238f] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Silver-catalyzed δ-regioselective heteroarylation of C(sp3)–H bonds (1°, 2°, and 3°) in alcohols with divergent N-heteroarenes.
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Affiliation(s)
- Jiadi Zhou
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. of China
| | - Cheng Cheng
- College of Pharmaceutical Sciences
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. of China
| | - Zhihao Lin
- College of Pharmaceutical Sciences
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. of China
| | - Quanlei Ren
- College of Pharmaceutical Sciences
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. of China
| | - Ning Xu
- College of Pharmaceutical Sciences
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. of China
| | - Jiangfeng Lin
- College of Pharmaceutical Sciences
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. of China
| | - Yimin Qin
- College of Pharmaceutical Sciences
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. of China
| | - Jianjun Li
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. of China
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157
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Liu L, Fan W, Chen W, Chen X, Li S. KF-Promoted copper-catalyzed highly efficient and selective oxidation of methane and other alkanes with a dramatic additive effect. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00474c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Selective oxidation of methane is traditionally challenging. Now using KF could dramatic improve the efficiency of copper catalyzed methane oxidation with K2S2O8 as oxidant. The role of KF is conjectured to promote [SO4˙]− to escape the solvent cage.
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Affiliation(s)
- Luyao Liu
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Wu Fan
- Key Laboratory of Tobacco Flavor Basic Research
- Zhengzhou Tobacco Research Institute of CNTC
- Zhengzhou 450001
- China
| | - Wei Chen
- Department of Colorectal Surgery & Guangdong Provincial Key laboratory of Colorectal and Pelvic Floor Disease & Guangdong Research Institute of Gastroenterology
- The Sixth Affiliated Hospital of Sun Yat-Sen University
- Guangzhou 510655
- China
| | - Xiaoyan Chen
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Suhua Li
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- China
- Key Lab of Functional Molecular Engineering of Guangdong Province
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158
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Mannarsamy M, Prabusankar G. Rare proximity enforced copper hydrogen interactions in copper( i)-chalcogenones. NEW J CHEM 2021. [DOI: 10.1039/d1nj00397f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Homoleptic tetra-coordinated copper(i)-chalcogenone complexes have been reported with rare proximity-enforced intramolecular Cu⋯H–C(sp3) hydrogen bonding interactions.
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159
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Yang J, Liu C, Zhou H, Fan R, Ma B, Li Z. Visible-light-promoted α-methoxymethylation and aminomethylation of ketones with methanol as the C1 source. Org Biomol Chem 2021; 19:5572-5576. [PMID: 34085081 DOI: 10.1039/d1ob00765c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Visible-light-promoted α-methoxymethylation and aminomethylation of ketones using methanol as a sustainable C1 source have been developed. With rose bengal as the photosensitizer and air as the green oxidant, the methoxymethylation reactions proceeded smoothly under visible light irradiation at ambient temperature. Additionally, a one-pot one-step α-aminomethylation of ketones was achieved by adding N-nucleophiles. Preliminary mechanism studies suggest that the reaction mainly proceeds via a radical pathway.
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Affiliation(s)
- Jingya Yang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Cai Liu
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Hongyan Zhou
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China. and College of Science, Gansu Agricultural University, Lanzhou 730070, China
| | - Rundong Fan
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Ben Ma
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Zheng Li
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
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160
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Xia M, Huang H, Zhang X, Wei QH, Xie Z. Single-atom cobalt-fused biomolecule-derived nitrogen-doped carbon nanosheets for selective oxidation reactions. Phys Chem Chem Phys 2021; 23:14276-14283. [PMID: 34159984 DOI: 10.1039/d1cp01113h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Non-noble metal single-atom catalysts hold great promise in selective oxidation reactions, although the progress is still unsatisfactory because of the synthesis challenge and the lack of mechanistic interpretations. Herein, we develop a biomolecule-based strategy to synthesize isolated Co single atom site catalysts by one-step pyrolysis of guanosine and Co precursors. Due to the abundant hydrogen bonding and π-π interaction of guanosine, the as-synthesized Co-N-C catalysts present a hierarchical porous two-dimensional (2D) nanostructure with an ultrahigh specific surface area, large pore volume, and high density of cobalt single atoms. Aberration-corrected electron microscopy and X-ray photoelectron spectroscopy reveal that Co species are present as isolated single sites and stabilized by nitrogen-doped carbon nanosheets. These characteristics make Co-GS-900 suitable as an efficient catalyst for selective oxidation of aromatic alkanes. For oxidation of ethylbenzene, Co-GS-900 exhibits a superior performance f with 91% conversion and 98% selectivity of acetophenone.
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Affiliation(s)
- Miao Xia
- State Key Laboratory of Photocatalysis on Energy and Environment, Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, 2 Xueyuan Road, Fuzhou 350016, China.
| | - Haitao Huang
- State Key Laboratory of Photocatalysis on Energy and Environment, Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, 2 Xueyuan Road, Fuzhou 350016, China.
| | - Xuefei Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, 2 Xueyuan Road, Fuzhou 350016, China.
| | - Qiao-Hua Wei
- State Key Laboratory of Photocatalysis on Energy and Environment, Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, 2 Xueyuan Road, Fuzhou 350016, China.
| | - Zailai Xie
- State Key Laboratory of Photocatalysis on Energy and Environment, Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, 2 Xueyuan Road, Fuzhou 350016, China.
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161
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Zhang H, Sun MC, Yin LM, Wei D, Song MP, Yang D, Niu JL. Direct intramolecular C(sp 3)–H bond sulfonamidation to synthesize benzosultam derivatives under metal-free conditions. Org Chem Front 2021. [DOI: 10.1039/d1qo01235e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An efficient intramolecular C(sp3)–H bond amination under metal-free conditions has been developed to provide a straightforward method for the synthesis of 5-membered cyclic sulfonamides (benzosultams).
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Affiliation(s)
- He Zhang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Meng-Chan Sun
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Li-Ming Yin
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Donghui Wei
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Mao-Ping Song
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Dandan Yang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Jun-Long Niu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
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162
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Huang M, Jia Z, Luo S, Cheng JP. Quantitative Thermodynamic and Kinetic Parameters of Radical. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202106018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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163
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Xu M, Xia Y. Mechanistic Understanding of Rh(III)-Catalyzed Redox-Neutral C—H Activation/Annulation Reactions of N-Phenoxyacetamides and Methyleneoxetanones. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202103054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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164
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Meyer TH, Samanta RC, Del Vecchio A, Ackermann L. Mangana(iii/iv)electro-catalyzed C(sp 3)-H azidation. Chem Sci 2020; 12:2890-2897. [PMID: 34164055 PMCID: PMC8179422 DOI: 10.1039/d0sc05924b] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 12/28/2020] [Indexed: 01/16/2023] Open
Abstract
Manganaelectro-catalyzed azidation of otherwise inert C(sp3)-H bonds was accomplished using most user-friendly sodium azide as the nitrogen-source. The operationally simple, resource-economic C-H azidation strategy was characterized by mild reaction conditions, no directing group, traceless electrons as the sole redox-reagent, Earth-abundant manganese as the catalyst, high functional-group compatibility and high chemoselectivity, setting the stage for late-stage azidation of bioactive compounds. Detailed mechanistic studies by experiment, spectrophotometry and cyclic voltammetry provided strong support for metal-catalyzed aliphatic radical formation, along with subsequent azidyl radical transfer within a manganese(iii/iv) manifold.
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Affiliation(s)
- Tjark H Meyer
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
- Woehler Research Institute for Sustainable Chemistry (WISCh), Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Ramesh C Samanta
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
- Woehler Research Institute for Sustainable Chemistry (WISCh), Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Antonio Del Vecchio
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
- Woehler Research Institute for Sustainable Chemistry (WISCh), Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
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165
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Wu JY, Li Z, Yang JD, Cheng JP. Bonding Energetics of Palladium Amido/Aryloxide Complexes in DMSO: Implications for Palladium-Mediated Aniline Activation. Angew Chem Int Ed Engl 2020; 59:23782-23790. [PMID: 32910524 DOI: 10.1002/anie.202011313] [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: 08/18/2020] [Indexed: 12/20/2022]
Abstract
Thermodynamic knowledge of the metal-ligand (M-L) σ-bond strength is crucial to understanding metal-mediated transformations. Here, we developed a method for determining the Pd-X (X=OR and NHAr) bond heterolysis energies (ΔGhet (Pd-X)) in DMSO taking [(tmeda)PdArX] (tmeda=N,N,N',N'-tetramethylethylenediamine) as the model complexes. The ΔGhet (Pd-X) scales span a range of 2.6-9.0 kcal mol-1 for ΔGhet (Pd-O) values and of 14.5-19.5 kcal mol-1 for ΔGhet (Pd-N) values, respectively, implying a facile heterolytic detachment of the Pd ligands. Structure-reactivity analyses of a modeling Pd-mediated X-H bond activation reveal that the M-X bond metathesis is dominated by differences of the X-H and Pd-X bond strengths, the former being more influential. The ΔGhet (Pd-X) and pKa (X-H) parameters enable regulation of reaction thermodynamics and chemoselectivity and diagnosing the probability of aniline activation with Pd-X complexes.
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Affiliation(s)
- Jun-Yan Wu
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Zhen Li
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Jin-Dong Yang
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Jin-Pei Cheng
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, 100084, China.,State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Tianjing 3, 00071, China
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166
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Wu J, Li Z, Yang J, Cheng J. Bonding Energetics of Palladium Amido/Aryloxide Complexes in DMSO: Implications for Palladium‐Mediated Aniline Activation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jun‐Yan Wu
- Center of Basic Molecular Science Department of Chemistry Tsinghua University Beijing 100084 China
| | - Zhen Li
- Center of Basic Molecular Science Department of Chemistry Tsinghua University Beijing 100084 China
| | - Jin‐Dong Yang
- Center of Basic Molecular Science Department of Chemistry Tsinghua University Beijing 100084 China
| | - Jin‐Pei Cheng
- Center of Basic Molecular Science Department of Chemistry Tsinghua University Beijing 100084 China
- State Key Laboratory of Elemento-organic Chemistry College of Chemistry Nankai University Tianjing 3 00071 China
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167
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Guo JD, Yang XL, Chen B, Tung CH, Wu LZ. Photoredox/Cobalt-Catalyzed C(sp3)–H Bond Functionalization toward Phenanthrene Skeletons with Hydrogen Evolution. Org Lett 2020; 22:9627-9632. [DOI: 10.1021/acs.orglett.0c03665] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jia-Dong Guo
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P.R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiu-Long Yang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P.R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P.R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P.R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P.R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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168
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Li G, An J, Jia C, Yan B, Zhong L, Wang J, Yang S. m-CAr–H Bond Alkylations and Difluoromethylation of Tertiary Phosphines Using a Ruthenium Catalyst. Org Lett 2020; 22:9450-9455. [DOI: 10.1021/acs.orglett.0c03377] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gang Li
- College of Chemistry and Chemical Engineering, Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455002, P. R. China
| | - Jiangzhen An
- College of Chemistry and Chemical Engineering, Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455002, P. R. China
| | - Chunqi Jia
- Engineering Research Center of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China
| | - Bingxu Yan
- College of Chemistry and Chemical Engineering, Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455002, P. R. China
| | - Lei Zhong
- College of Chemistry and Chemical Engineering, Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455002, P. R. China
| | - Junjie Wang
- College of Chemistry and Chemical Engineering, Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455002, P. R. China
| | - Suling Yang
- College of Chemistry and Chemical Engineering, Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455002, P. R. China
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169
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Shu X, Huan L, Huang Q, Huo H. Direct Enantioselective C(sp 3)-H Acylation for the Synthesis of α-Amino Ketones. J Am Chem Soc 2020; 142:19058-19064. [PMID: 33125845 DOI: 10.1021/jacs.0c10471] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A direct enantioselective acylation of α-amino C(sp3)-H bonds with carboxylic acids has been achieved via the merger of transition metal and photoredox catalysis. This straightforward protocol enables cross-coupling of a wide range of carboxylic acids, one class of feedstock chemicals, with readily available N-alkyl benzamides to produce highly valuable α-amino ketones in high enantioselectivities under mild conditions. The synthetic utility of this method is further demonstrated by gram scale synthesis and application to late-stage functionalization. This method provides an unprecedented solution to address the challenging stereocontrol in metallaphotoredox catalysis and C(sp3)-H functionalization. Mechanistic studies suggest the α-C(sp3)-H bond of the benzamide coupling partner is cleavage by photocatalytically generated bromine radicals to form α-amino alkyl radicals, which subsequently engages in nickel-catalyzed asymmetric acylation.
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Affiliation(s)
- Xiaomin Shu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Leitao Huan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Qian Huang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Haohua Huo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
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170
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Kong F, Gu S, Liu C, Dickie DA, Zhang S, Gunnoe TB. Effects of Additives on Catalytic Arene C–H Activation: Study of Rh Catalysts Supported by Bis-phosphine Pincer Ligands. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00623] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Fanji Kong
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Shunyan Gu
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Chang Liu
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Diane A. Dickie
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Sen Zhang
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - T. Brent Gunnoe
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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171
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Kannan N, Patil AR, Sinha A. Direct C-H bond halogenation and pseudohalogenation of hydrocarbons mediated by high-valent 3d metal-oxo species. Dalton Trans 2020; 49:14344-14360. [PMID: 33057538 DOI: 10.1039/d0dt02533j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Late-stage direct functionalization of the C-H bond is synthetically desirable. Metalloenzymes having metal-oxo active sites are well known to selectively catalyze hydroxylation and halogenation reactions with high efficiency. This review highlights the recent developments in the field of direct C-H halogenation and pseudohalogenation reactions catalyzed by the functional models of metalloenzymes.
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Affiliation(s)
- Neppoliyan Kannan
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India.
| | - Akshay R Patil
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India.
| | - Arup Sinha
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India.
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172
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Nie B, Wu W, Ren Q, Wang Z, Zhang J, Zhang Y, Jiang H. Access to Cycloalkeno[ c]-Fused Pyridines via Pd-Catalyzed C(sp 2)-H Activation and Cyclization of N-Acetyl Hydrazones of Acylcycloalkenes with Vinyl Azides. Org Lett 2020; 22:7786-7790. [PMID: 32990446 DOI: 10.1021/acs.orglett.0c02466] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A novel Pd(II)-catalyzed vinylic C-H activation and cyclization has been developed, reacting a series of small, medium, and large N-acetyl hydrazones of acylcycloalkenes with vinyl azides to access diverse cycloalkeno[c]-fused pyridine scaffolds. This protocol provides progress in C(sp2)-H bond activation of medium to large cycloalkenes, and the target products can be obtained in a specific regioselectivity with good functional group tolerance and a broad substrate scope.
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Affiliation(s)
- Biao Nie
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Qingyun Ren
- State Key Laboratory of Anti-Infective Drug Development (No. 2015DQ780357), Sunshine Lake Pharma Company, Ltd., Dongguan 523871, China
| | - Zhongqing Wang
- State Key Laboratory of Anti-Infective Drug Development (No. 2015DQ780357), Sunshine Lake Pharma Company, Ltd., Dongguan 523871, China
| | - Ji Zhang
- State Key Laboratory of Anti-Infective Drug Development (No. 2015DQ780357), Sunshine Lake Pharma Company, Ltd., Dongguan 523871, China
| | - Yingjun Zhang
- State Key Laboratory of Anti-Infective Drug Development (No. 2015DQ780357), Sunshine Lake Pharma Company, Ltd., Dongguan 523871, China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.,State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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173
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Zhang Y, Zhong D, Usman M, Xue P, Liu W. Iron‐Catalyzed
Primary C—H Amination of Sulfamate Esters and Its Application in Synthesis of Azetidines
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000299] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yan Zhang
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University Wuhan Hubei 430072 China
| | - Dayou Zhong
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University Wuhan Hubei 430072 China
| | - Muhammad Usman
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University Wuhan Hubei 430072 China
| | - Peng Xue
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University Wuhan Hubei 430072 China
| | - Wen‐Bo Liu
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University Wuhan Hubei 430072 China
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174
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Esteruelas MA, Martínez A, Oliván M, Oñate E. Direct C-H Borylation of Arenes Catalyzed by Saturated Hydride-Boryl-Iridium-POP Complexes: Kinetic Analysis of the Elemental Steps. Chemistry 2020; 26:12632-12644. [PMID: 32428335 DOI: 10.1002/chem.202001838] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 05/14/2020] [Indexed: 12/15/2022]
Abstract
The saturated trihydride IrH3 {κ3 -P,O,P-[xant(PiPr2 )2 ]} (1; xant(PiPr2 )2 =9,9-dimethyl-4,5-bis(diisopropylphosphino)xanthene) activates the B-H bond of two molecules of pinacolborane (HBpin) to give H2 , the hydride-boryl derivatives IrH2 (Bpin){κ3 -P,O,P-[xant(PiPr2 )2 ]} (2) and IrH(Bpin)2 {κ3 -P,O,P-[xant(PiPr2 )2 ]} (3) in a sequential manner. Complex 3 activates a C-H bond of two molecules of benzene to form PhBpin and regenerates 2 and 1, also in a sequential manner. Thus, complexes 1, 2, and 3 define two cycles for the catalytic direct C-H borylation of arenes with HBpin, which have dihydride 2 as a common intermediate. C-H bond activation of the arenes is the rate-determining step of both cycles, as the C-H oxidative addition to 3 is faster than to 2. The results from a kinetic study of the reactions of 1 and 2 with HBpin support a cooperative function of the hydride ligands in the B-H bond activation. The addition of the boron atom of the borane to a hydride facilitates the coordination of the B-H bond through the formation of κ1 - and κ2 -dihydrideborate intermediates.
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Affiliation(s)
- Miguel A Esteruelas
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009, Zaragoza, Spain
| | - Antonio Martínez
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009, Zaragoza, Spain
| | - Montserrat Oliván
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009, Zaragoza, Spain
| | - Enrique Oñate
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009, Zaragoza, Spain
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175
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Abel-Snape X, Whyte A, Lautens M. Synthesis of Aminated Phenanthridinones via Palladium/Norbornene Catalysis. Org Lett 2020; 22:7920-7925. [DOI: 10.1021/acs.orglett.0c02850] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Xavier Abel-Snape
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, Toronto M5S 3H6, Canada
| | - Andrew Whyte
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, Toronto M5S 3H6, Canada
| | - Mark Lautens
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, Toronto M5S 3H6, Canada
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176
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Kotani H, Shimomura H, Ikeda K, Ishizuka T, Shiota Y, Yoshizawa K, Kojima T. Mechanistic Insight into Concerted Proton-Electron Transfer of a Ru(IV)-Oxo Complex: A Possible Oxidative Asynchronicity. J Am Chem Soc 2020; 142:16982-16989. [PMID: 32924508 DOI: 10.1021/jacs.0c05738] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have thoroughly investigated the oxidation of benzyl alcohol (BA) derivatives by a RuIV(O) complex (RuIV(O)) in the absence or presence of Brønsted acids in order to elucidate the proton-coupled electron-transfer (PCET) mechanisms in C-H oxidation on the basis of a kinetic analysis. Oxidation of BA derivatives by RuIV(O) without acids proceeded through concerted proton-electron transfer (CPET) with a large kinetic isotope effect (KIE). In contrast, the oxidation of 3,4,5-trimethoxy-BA ((MeO)3-BA) by RuIV(O) was accelerated by the addition of acids, in which the KIE value reached 1.1 with TFA (550 mM), indicating an alteration of the PCET mechanism from CPET to stepwise electron transfer (ET) followed by proton transfer (PT). Although the oxidized products of BA derivatives were confirmed to be the corresponding benzaldehydes in the range of acid concentrations (0-550 mM), a one-electron-reduction potential of RuIV(O) was positively shifted with increases in the concentrations of acids. The elevated reduction potential of RuIV(O) strongly influenced the PCET mechanisms in the oxidation of (MeO)3-BA, changing the mechanism from CPET to ET/PT, as evidenced by the driving-force dependence of logarithms of reaction rate constants in light of the Marcus theory of ET. In addition, dependence of activation parameters on acid concentrations suggested that an oxidative asynchronous CPET, which is not an admixture of the CPET and ET/PT mechanisms, is probably operative in the boundary region (0 mM < [TFA] < 50 mM) involving a one-proton-interacted RuIV(O)···H+ as a dominant reactive species.
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Affiliation(s)
- Hiroaki Kotani
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba and CREST (JST), 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
| | - Hinatsu Shimomura
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba and CREST (JST), 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
| | - Kei Ikeda
- Institute for Materials Chemistry and Engineering, Kyushu University and CREST (JST), Motooka, Nishi-Ku, Fukuoka 819-0395, Japan
| | - Tomoya Ishizuka
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba and CREST (JST), 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering, Kyushu University and CREST (JST), Motooka, Nishi-Ku, Fukuoka 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering, Kyushu University and CREST (JST), Motooka, Nishi-Ku, Fukuoka 819-0395, Japan
| | - Takahiko Kojima
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba and CREST (JST), 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
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177
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Smith JA, Schouten A, Wilde JH, Westendorff KS, Dickie DA, Ess DH, Harman WD. Experiments and Direct Dynamics Simulations That Probe η 2-Arene/Aryl Hydride Equilibria of Tungsten Benzene Complexes. J Am Chem Soc 2020; 142:16437-16454. [PMID: 32842728 DOI: 10.1021/jacs.0c08032] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Key steps in the functionalization of an unactivated arene often involve its dihaptocoordination by a transition metal followed by insertion into the C-H bond. However, rarely are the η2-arene and aryl hydride species in measurable equilibrium. In this study, the benzene/phenyl hydride equilibrium is explored for the {WTp(NO)(PBu3)} (Bu = n-butyl; Tp = trispyrazoylborate) system as a function of temperature, solvent, ancillary ligand, and arene substituent. Both face-flip and ring-walk isomerizations are identified through spin-saturation exchange measurements, which both appear to operate through scission of a C-H bond. The effect of either an electron-donating or electron-withdrawing substituent is to increase the stability of both arene and aryl hydride isomers. Crystal structures, electrochemical measurements, and extensive NMR data further support these findings. Static density functional theory calculations of the benzene-to-phenyl hydride landscape suggest a single linear sequence for this transformation involving a sigma complex and oxidative cleavage transition state. Static DFT calculations also identified an η2-coordinated benzene complex in which the arene is held more loosely than in the ground state, primarily through dispersion forces. Although a single reaction pathway was identified by static calculations, quasiclassical direct dynamics simulations identified a network of several reaction pathways connecting the η2-benzene and phenyl hydride isomers, due to the relatively flat energy landscape.
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Affiliation(s)
- Jacob A Smith
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Anna Schouten
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Justin H Wilde
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Karl S Westendorff
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Diane A Dickie
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Daniel H Ess
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - W Dean Harman
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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178
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Abstract
Alkanes and [B12X12]2- (X = Cl, Br) are both stable compounds which are difficult to functionalize. Here we demonstrate the formation of a boron-carbon bond between these substances in a two-step process. Fragmentation of [B12X12]2- in the gas phase generates highly reactive [B12X11]- ions which spontaneously react with alkanes. The reaction mechanism was investigated using tandem mass spectrometry and gas-phase vibrational spectroscopy combined with electronic structure calculations. [B12X11]- reacts by an electrophilic substitution of a proton in an alkane resulting in a B-C bond formation. The product is a dianionic [B12X11CnH2n+1]2- species, to which H+ is electrostatically bound. High-flux ion soft landing was performed to codeposit [B12X11]- and complex organic molecules (phthalates) in thin layers on surfaces. Molecular structure analysis of the product films revealed that C-H functionalization by [B12X11]- occurred in the presence of other more reactive functional groups. This observation demonstrates the utility of highly reactive fragment ions for selective bond formation processes and may pave the way for the use of gas-phase ion chemistry for the generation of complex molecular structures in the condensed phase.
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179
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Mejía E, Almasalma AA. Recent Advances on Copper-Catalyzed C–C Bond Formation via C–H Functionalization. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1707815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Reactions that form C–C bonds are at the heart of many important transformations, both in industry and in academia. From the myriad of catalytic approaches to achieve such transformations, those relying on C–H functionalization are gaining increasing interest due to their inherent sustainable nature. In this short review, we showcase the most recent advances in the field of C–C bond formation via C–H functionalization, but focusing only on those methodologies relying on copper catalysts. This coinage metal has gained increased popularity in recent years, not only because it is cheaper and more abundant than precious metals, but also thanks to its rich and versatile chemistry.1 Introduction2 Cross-Dehydrogenative Coupling under Thermal Conditions2.1 C(sp3)–C(sp3) Bond Formation2.2 C(sp3)–C(sp2) Bond Formation2.3 C(sp2)–C(sp2) Bond Formation2.4 C(sp3)–C(sp) Bond Formation3 Cross-Dehydrogenative Coupling under Photochemical Conditions3.1 C(sp3)–C(sp3) Bond Formation3.2 C(sp3)–C(sp2) and C(sp3)–C(sp) Bond Formation4 Conclusion and Perspective
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180
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Yang Q, Li Y, Yang J, Liu Y, Zhang L, Luo S, Cheng J. Holistic Prediction of the p
K
a
in Diverse Solvents Based on a Machine‐Learning Approach. Angew Chem Int Ed Engl 2020; 59:19282-19291. [DOI: 10.1002/anie.202008528] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/13/2020] [Indexed: 12/12/2022]
Affiliation(s)
- Qi Yang
- Center of Basic Molecular Science Department of Chemistry Tsinghua University 100084 Beijing China
| | - Yao Li
- Center of Basic Molecular Science Department of Chemistry Tsinghua University 100084 Beijing China
| | - Jin‐Dong Yang
- Center of Basic Molecular Science Department of Chemistry Tsinghua University 100084 Beijing China
| | - Yidi Liu
- Center of Basic Molecular Science Department of Chemistry Tsinghua University 100084 Beijing China
| | - Long Zhang
- Center of Basic Molecular Science Department of Chemistry Tsinghua University 100084 Beijing China
| | - Sanzhong Luo
- Center of Basic Molecular Science Department of Chemistry Tsinghua University 100084 Beijing China
| | - Jin‐Pei Cheng
- Center of Basic Molecular Science Department of Chemistry Tsinghua University 100084 Beijing China
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181
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Yang Q, Li Y, Yang J, Liu Y, Zhang L, Luo S, Cheng J. Holistic Prediction of the p
K
a
in Diverse Solvents Based on a Machine‐Learning Approach. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008528] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Qi Yang
- Center of Basic Molecular Science Department of Chemistry Tsinghua University 100084 Beijing China
| | - Yao Li
- Center of Basic Molecular Science Department of Chemistry Tsinghua University 100084 Beijing China
| | - Jin‐Dong Yang
- Center of Basic Molecular Science Department of Chemistry Tsinghua University 100084 Beijing China
| | - Yidi Liu
- Center of Basic Molecular Science Department of Chemistry Tsinghua University 100084 Beijing China
| | - Long Zhang
- Center of Basic Molecular Science Department of Chemistry Tsinghua University 100084 Beijing China
| | - Sanzhong Luo
- Center of Basic Molecular Science Department of Chemistry Tsinghua University 100084 Beijing China
| | - Jin‐Pei Cheng
- Center of Basic Molecular Science Department of Chemistry Tsinghua University 100084 Beijing China
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182
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Tsukamoto T, Dong G. Catalytic Dehydrogenative Cyclization of
o
‐Teraryls under pH‐Neutral and Oxidant‐Free Conditions. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004719] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | - Guangbin Dong
- Department of Chemistry University of Chicago Chicago IL 60637 USA
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183
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Bakthadoss M, Reddy TT, Sharada DS. Ruthenium-catalyzed, site-selective C-H activation: access to C5-substituted azaflavanone. RSC Adv 2020; 10:31570-31574. [PMID: 35520642 PMCID: PMC9056431 DOI: 10.1039/d0ra06580c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 08/17/2020] [Indexed: 11/21/2022] Open
Abstract
A site-selective ruthenium-catalyzed keto group assisted C–H bond activation of 2-aryl tetrahydroquinoline (azaflavanone) derivatives has been achieved with a variety of alkenes for the first time. A wide range of substrates was utilized for the synthesis of a wide variety of alkenylated azaflavanones. This simple and efficient protocol provides the C5-substituted azaflavanone derivatives in high yields with a broad range of functional group tolerance. Further, the C5-alkenylated products were converted into substituted 2-aryl quinoline derivatives in good yields. A site-selective ruthenium-catalyzed keto group assisted C–H bond activation of 2-aryl tetrahydroquinoline (azaflavanone) derivatives has been achieved with a variety of alkenes for the first time.![]()
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Affiliation(s)
| | | | - Duddu S Sharada
- Department of Chemistry, Indian Institute of Technology Hyderabad Telangana-502285 India
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184
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Cabrera-Trujillo JJ, Fernández I. Rationalizing the Al I -Promoted Oxidative Addition of C-C Versus C-H Bonds in Arenes. Chemistry 2020; 26:11806-11813. [PMID: 32329537 DOI: 10.1002/chem.202000921] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 04/22/2020] [Indexed: 01/17/2023]
Abstract
The factors controlling the oxidative addition of C-C and C-H bonds in arenes mediated by AlI have been computationally explored by means of Density Functional Theory calculations. To this end, we compared the processes involving benzene, naphthalene and anthracene which are promoted by a recently prepared anionic AlI -carbenoid. It is found that this species exhibits a strong tendency to oxidatively activate C-H bonds over C-C bonds, with the notable exception of benzene, where the C-C bond activation is feasible but only under kinetic control reaction conditions. State-of-the-art computational methods based on the combination of the Activation Strain Model of reactivity and the Energy Decomposition Analysis have been used to rationalize the competition between both bond activation reactions as well as to quantitatively analyze in detail the ultimate factors controlling these transformations.
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Affiliation(s)
- Jorge Juan Cabrera-Trujillo
- Departamento de Química Orgánica I and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Israel Fernández
- Departamento de Química Orgánica I and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
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185
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Weis E, Johansson MJ, Martín‐Matute B. Ir III -Catalyzed Selective ortho-Monoiodination of Benzoic Acids with Unbiased C-H Bonds. Chemistry 2020; 26:10185-10190. [PMID: 32449557 PMCID: PMC7496429 DOI: 10.1002/chem.202002204] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Indexed: 11/15/2022]
Abstract
An iridium-catalyzed selective ortho-monoiodination of benzoic acids with two equivalent C-H bonds is presented. A wide range of electron-rich and electron-poor substrates undergo the reaction under mild conditions, with >20:1 mono/di selectivity. Importantly, the C-H iodination occurs selectively ortho to the carboxylic acid moiety in substrates bearing competing coordinating directing groups. The reaction is performed at room temperature and no inert atmosphere or exclusion of moisture is required. Mechanistic investigations revealed a substrate-dependent reversible C-H activation/protodemetalation step, a substrate-dependent turnover-limiting step, and the crucial role of the AgI additive in the deactivation of the iodination product towards further reaction.
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Affiliation(s)
- Erik Weis
- Department of Organic ChemistryStockholm UniversityStockholm10691Sweden
- Medicinal Chemistry, Research and Early DevelopmentCardiovascular, Renal and Metabolism (CVRM)BioPharmaceuticals R&DAstraZenecaGothenburgSweden
| | - Magnus J. Johansson
- Medicinal Chemistry, Research and Early DevelopmentCardiovascular, Renal and Metabolism (CVRM)BioPharmaceuticals R&DAstraZenecaGothenburgSweden
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186
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Grumbles WM, Cundari TR. Computational Determination of p Ka(C–H) in 3d Transition Metal-Methyl Complexes. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- William M. Grumbles
- Department of Chemistry and Center for Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
| | - Thomas R. Cundari
- Department of Chemistry and Center for Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
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187
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Bisht N, Babu SA, Tomar R. Pd(II)‐Catalyzed, Bidentate Directing Group‐aided Alkylation of sp
3
γ‐C−H Bonds: Access to 3‐Alkylated Thiophene/Furan and Benzothiophene/Benzofuran Motifs. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000284] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Narendra Bisht
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O. Punjab 140306 India
| | - Srinivasarao Arulananda Babu
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O. Punjab 140306 India
| | - Radha Tomar
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O. Punjab 140306 India
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188
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Lei H, Rovis T. A site-selective amination catalyst discriminates between nearly identical C-H bonds of unsymmetrical disubstituted alkenes. Nat Chem 2020; 12:725-731. [PMID: 32541949 PMCID: PMC7428077 DOI: 10.1038/s41557-020-0470-z] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Accepted: 04/21/2020] [Indexed: 12/21/2022]
Abstract
C-H activation reactions enable chemists to unveil new retrosynthetic disconnections and streamline conventional synthetic approaches. A long-standing challenge in C-H activation is the inability to distinguish electronically and sterically similar C-H bonds. Although numerous synergistic combinations of transition-metal complexes and chelating directing groups have been utilized to distinguish C-H bonds, undirected regioselective C-H functionalization strategies remain elusive. Here we report a regioselective C-H activation/amination reaction of various unsymmetrical dialkyl-substituted alkenes. The regioselectivity of C-H activation is correlated to the electronic properties of allylic C-H bonds indicated by the corresponding 1JCH coupling constants. A linear relationship between the difference in the 1JCH coupling constants of the two competing allylic C-H bonds (Δ1JCH) and the C-H activation barriers (ΔΔG‡) has also been determined.
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Affiliation(s)
- Honghui Lei
- Department of Chemistry, Columbia University, New York, NY, USA
| | - Tomislav Rovis
- Department of Chemistry, Columbia University, New York, NY, USA.
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189
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Li HX, Zhu DL, Young DJ. Carbonyl-Photoredox/Metal Dual Catalysis: Applications in Organic Synthesis. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1707183] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Photoredox/metal dual catalysis is a versatile tandem methodology to construct carbon–carbon and carbon–heteroatom bonds. The focus of this short review is the application of this technology to C(sp3)–C(sp3), C(sp3)–C(sp2), C(sp2)–C(sp2), C(sp2)–O, and C(sp3)–O bond formation induced by readily available and inexpensive carbonyl complexes as single electron transfer agents, photosensitizers, or hydrogen atom transfer agents.1 Introduction2 Homocoupling of Aryl Halides3 Functionalization of C(sp3)–H Bonds3.1 Dehydrogenation of Alkanes3.2 Arylation/Alkylation3.3 Carboxylation3.4 Acylation3.5 Hydroalkylation of Olefins3.6 Hydroalkylation of Imines4 Benzoylation of Aryl Bromides5 Aryl Esterification6 Oxidation of β-Keto Esters7 Conclusions and Future Outlook
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Affiliation(s)
- Hong-Xi Li
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University
| | - Da-Liang Zhu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University
| | - David James Young
- College of Engineering, Information Technology and Environment, Charles Darwin University
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190
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Knezevic M, Heilmann M, Piccini GM, Tiefenbacher K. Überwindung der intrinsischen Reaktivität bei aliphatischer C‐H‐Oxidation: Bevorzugte C3/C4‐Oxidation von aliphatischen Ammoniumsubstraten. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004242] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Melina Knezevic
- Departement Chemie Universität Basel Mattenstrasse 24a 4058 Basel Schweiz
| | - Michael Heilmann
- Departement Chemie Universität Basel Mattenstrasse 24a 4058 Basel Schweiz
| | - Giovanni Maria Piccini
- Departement Chemie und Angewandte Biowissenschaften ETH Zürich c/o USI Campus, Via Giuseppe Buffi 13 CH-6900 Lugano Schweiz
- Facoltàdi Informatica Istituto di Scienze Computazionali Universitàdella SvizzeraItaliana (USI) Via Giuseppe Buffi 13 CH-6900 Lugano Schweiz
| | - Konrad Tiefenbacher
- Departement Chemie Universität Basel Mattenstrasse 24a 4058 Basel Schweiz
- Departement Biosysteme ETH Zürich Mattenstrasse 24 4058 Basel Schweiz
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191
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Corpas J, Viereck P, Chirik PJ. C(sp2)–H Activation with Pyridine Dicarbene Iron Dialkyl Complexes: Hydrogen Isotope Exchange of Arenes Using Benzene-d6 as a Deuterium Source. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01714] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Javier Corpas
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Calle Francisco Tomás y Valiente 7, Cantoblanco, 28049 Madrid, Spain
| | - Peter Viereck
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Paul J. Chirik
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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192
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Buil ML, Esteruelas MA, Izquierdo S, Nicasio AI, Oñate E. N–H and C–H Bond Activations of an Isoindoline Promoted by Iridium- and Osmium-Polyhydride Complexes: A Noninnocent Bridge Ligand for Acceptorless and Base-Free Dehydrogenation of Secondary Alcohols. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00316] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- María L. Buil
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Miguel A. Esteruelas
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Susana Izquierdo
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Antonio I. Nicasio
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Enrique Oñate
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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193
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Vicens L, Olivo G, Costas M. Rational Design of Bioinspired Catalysts for Selective Oxidations. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02073] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Laia Vicens
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, Campus de Montilivi, 17071 Girona, Spain
| | - Giorgio Olivo
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, Campus de Montilivi, 17071 Girona, Spain
| | - Miquel Costas
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, Campus de Montilivi, 17071 Girona, Spain
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194
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Knezevic M, Heilmann M, Piccini GM, Tiefenbacher K. Overriding Intrinsic Reactivity in Aliphatic C−H Oxidation: Preferential C3/C4 Oxidation of Aliphatic Ammonium Substrates. Angew Chem Int Ed Engl 2020; 59:12387-12391. [DOI: 10.1002/anie.202004242] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 05/20/2020] [Indexed: 01/15/2023]
Affiliation(s)
- Melina Knezevic
- Department of Chemistry University of Basel Mattenstrasse 24a 4058 Basel Switzerland
| | - Michael Heilmann
- Department of Chemistry University of Basel Mattenstrasse 24a 4058 Basel Switzerland
| | - Giovanni Maria Piccini
- Department of Chemistry and Applied Biosciences ETH Zurich c/o USI Campus, Via Giuseppe Buffi 13 CH-6900 Lugano Switzerland
- Facoltàdi Informatica Istituto di Scienze Computazionali Universitàdella SvizzeraItaliana (USI) Via Giuseppe Buffi 13 CH-6900 Lugano Switzerland
| | - Konrad Tiefenbacher
- Department of Chemistry University of Basel Mattenstrasse 24a 4058 Basel Switzerland
- Department of Biosystems Science and Engineering ETH Zurich Mattenstrasse 24 4058 Basel Switzerland
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195
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Chen J, Wu W, Li Q, Wei W. Visible‐Light Induced C(
sp
3
)−H Functionalization for the Formation of C−N Bonds under Metal Catalyst‐Free Conditions. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000448] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jin‐Yang Chen
- College of Chemistry and Chemical EngineeringYangtze Normal University Chongqing 408000 People's Republic of China
| | - Wenfeng Wu
- College of Chemistry and Materials EngineeringGuiyang University Guiyang 550005 People's Republic of China
| | - Qiang Li
- College of Chemistry and Materials EngineeringGuiyang University Guiyang 550005 People's Republic of China
- Institution of Functional Organic Molecules and MaterialsSchool of Chemistry and Chemical EngineeringLiaocheng University Liaocheng 252059 People's Republic of China
| | - Wen‐Ting Wei
- State Key Laboratory Base of Novel Functional Materials and Preparation ScienceSchool of Materials Science and Chemical EngineeringNingbo University Ningbo Zhejiang 315211 People's Republic of China
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196
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Tsukamoto T, Dong G. Catalytic Dehydrogenative Cyclization of
o
‐Teraryls under pH‐Neutral and Oxidant‐Free Conditions. Angew Chem Int Ed Engl 2020; 59:15249-15253. [DOI: 10.1002/anie.202004719] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/09/2020] [Indexed: 01/07/2023]
Affiliation(s)
| | - Guangbin Dong
- Department of Chemistry University of Chicago Chicago IL 60637 USA
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197
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Mondal P, Lovisari M, Twamley B, McDonald AR. Fast Hydrocarbon Oxidation by a High‐Valent Nickel–Fluoride Complex. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004639] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Prasenjit Mondal
- School of Chemistry Trinity College Dublin The University of Dublin College Green Dublin 2 Ireland
| | - Marta Lovisari
- School of Chemistry Trinity College Dublin The University of Dublin College Green Dublin 2 Ireland
| | - Brendan Twamley
- School of Chemistry Trinity College Dublin The University of Dublin College Green Dublin 2 Ireland
| | - Aidan R. McDonald
- School of Chemistry Trinity College Dublin The University of Dublin College Green Dublin 2 Ireland
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198
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Mondal P, Lovisari M, Twamley B, McDonald AR. Fast Hydrocarbon Oxidation by a High‐Valent Nickel–Fluoride Complex. Angew Chem Int Ed Engl 2020; 59:13044-13050. [DOI: 10.1002/anie.202004639] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Prasenjit Mondal
- School of Chemistry Trinity College Dublin The University of Dublin College Green Dublin 2 Ireland
| | - Marta Lovisari
- School of Chemistry Trinity College Dublin The University of Dublin College Green Dublin 2 Ireland
| | - Brendan Twamley
- School of Chemistry Trinity College Dublin The University of Dublin College Green Dublin 2 Ireland
| | - Aidan R. McDonald
- School of Chemistry Trinity College Dublin The University of Dublin College Green Dublin 2 Ireland
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199
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Reckziegel A, Pietzonka C, Kraus F, Werncke CG. C-H Bond Activation by an Imido Cobalt(III) and the Resulting Amido Cobalt(II) Complex. Angew Chem Int Ed Engl 2020; 59:8527-8531. [PMID: 32119164 PMCID: PMC7318117 DOI: 10.1002/anie.201914718] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Indexed: 12/31/2022]
Abstract
The 3d-metal mediated nitrene transfer is under intense scrutiny due to its potential as an atom economic and ecologically benign way for the directed amination of (un)functionalised C-H bonds. Here we present the isolation and characterisation of a rare, trigonal imido cobalt(III) complex, which bears a rather long cobalt-imido bond. It can cleanly cleave strong C-H bonds with a bond dissociation energy of up to 92 kcal mol-1 in an intermolecular fashion, unprecedented for imido cobalt complexes. This resulted in the amido cobalt(II) complex [Co(hmds)2 (NHt Bu)]- . Kinetic studies on this reaction revealed an H atom transfer mechanism. Remarkably, the cobalt(II) amide itself is capable of mediating H atom abstraction or stepwise proton/electron transfer depending on the substrate. A cobalt-mediated catalytic application for substrate dehydrogenation using an organo azide is presented.
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Affiliation(s)
- Alexander Reckziegel
- Fachbereich 15/ChemiePhilipps-Universität MarburgHans-Meerwein-Straße 435043MarburgGermany
| | - Clemens Pietzonka
- Fachbereich 15/ChemiePhilipps-Universität MarburgHans-Meerwein-Straße 435043MarburgGermany
| | - Florian Kraus
- Fachbereich 15/ChemiePhilipps-Universität MarburgHans-Meerwein-Straße 435043MarburgGermany
| | - C. Gunnar Werncke
- Fachbereich 15/ChemiePhilipps-Universität MarburgHans-Meerwein-Straße 435043MarburgGermany
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200
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Cancela L, Esteruelas MA, López AM, Oliván M, Oñate E, San-Torcuato A, Vélez A. Osmium- and Iridium-Promoted C–H Bond Activation of 2,2′-Bipyridines and Related Heterocycles: Kinetic and Thermodynamic Preferences. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00156] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Lara Cancela
- Departamento de Quı́mica Inorgánica-Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH)-Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Miguel A. Esteruelas
- Departamento de Quı́mica Inorgánica-Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH)-Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Ana M. López
- Departamento de Quı́mica Inorgánica-Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH)-Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Montserrat Oliván
- Departamento de Quı́mica Inorgánica-Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH)-Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Enrique Oñate
- Departamento de Quı́mica Inorgánica-Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH)-Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Ainhoa San-Torcuato
- Departamento de Quı́mica Inorgánica-Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH)-Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Andrea Vélez
- Departamento de Quı́mica Inorgánica-Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH)-Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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