1
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Wang J, Lin Phang Y, Yu YJ, Liu NN, Xie Q, Zhang FL, Jin JK, Wang YF. Boryl Radical as a Catalyst in Enabling Intra- and Intermolecular Cascade Radical Cyclization Reactions: Construction of Polycyclic Molecules. Angew Chem Int Ed Engl 2024; 63:e202405863. [PMID: 38589298 DOI: 10.1002/anie.202405863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 04/05/2024] [Accepted: 04/08/2024] [Indexed: 04/10/2024]
Abstract
Cascade radical cyclization constitutes an atom- and step-economic route for rapid assembly of polycyclic molecular skeletons. Although an array of redox-active metal catalysts has recently shown robust applications in enabling various catalytic cascade radical processes, the use of free organic radical as the catalyst, which is capable of triggering strategically distinct cascades, has rarely been developed. Here, we disclosed that the benzimidazolium-based N-heterocyclic carbene (NHC)-boryl radical is capable of catalyzing cascade cyclization reactions in both intra- and intermolecular pathways, assembling [5,5] fused bicyclic and [6,6,6] fused tricyclic molecules, respectively. The catalytic reactions start with the chemo- and regioselective addition of the boryl radical catalyst to a tethered alkene or alkyne moiety, followed by either an intramolecular formal [3+2] or an intermolecular [2+2+2] cycloaddition process to construct bicyclo[3.3.0]octane or tetrahydrophenanthridine skeletons, respectively. Eventually, a β-elimination occurs to release the boryl radical catalyst, completing a catalytic cycle. High to excellent diastereoselectivity is achieved in both catalytic reactions under substrate control.
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Affiliation(s)
- Jie Wang
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - Yee Lin Phang
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - You-Jie Yu
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - Nan-Nan Liu
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - Qiang Xie
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - Feng-Lian Zhang
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - Ji-Kang Jin
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
| | - Yi-Feng Wang
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, the, First Affiliated Hospital of USTC, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, Anhui, China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
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2
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Wang G, Yuan JL, Zhou R, Zou HB. Iron(II) Phthalocyanine-Catalyzed Homodimerization and Tandem Diamination of Diazo Compounds with Primary Amines: Access to Construct Substituted 2,3-Diaminosuccinonitriles in One-Pot. J Org Chem 2024. [PMID: 38783702 DOI: 10.1021/acs.joc.4c00376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
We herein first report the homodimerization and tandem diamination of diazo compounds with primary amines catalyzed by the iron(II) phthalocyanine (PcFe(II)), which can construct one C-C bond and two C-N bonds within 20 min in one-pot. Compared to the traditional metal-catalyzed N-H insertion reaction between amines with diazo reagents, the developed reaction almost does not generate the N-H insertion product, but the homodimerization/tandem diamination product. The proposed mechanism studies indicate that primary amines play a crucial role in the homocoupling of diazo compounds via dimerization of iron(III)-acetonitrile radical generated from the reaction between diazoacetonitrile with PcFe(II) coordinated by bis(amines); the β-hydride elimination is involved, and then, the attack of primary amines toward the carbon atoms on the formed C-C bond is followed. Moreover, this novel reaction can be used to effectively prepare substituted 2,3-diaminosuccinonitriles with high yields and even up to >99:1 d.r., encouragingly these products contain both 1,2-diamines and succinonitrile motifs, which are two classes of important organic compounds with significant applications in many yields. This reaction is also suitable for the gram-scale preparation of 2,3-bis(phenylamino)succinonitrile (2a) with a yield of 84%. Therefore, the developed reaction represents a new type of transformation.
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Affiliation(s)
- Gang Wang
- Department of Chemistry & Bioengineering, Yichun Key Laboratory of Applied Chemistry, Key Laboratory of Jiangxi University for Applied Chemistry & Chemical Biology, Yichun University, Yichun 336000, China
| | - Jia-Li Yuan
- Department of Chemistry & Bioengineering, Yichun Key Laboratory of Applied Chemistry, Key Laboratory of Jiangxi University for Applied Chemistry & Chemical Biology, Yichun University, Yichun 336000, China
| | - Rong Zhou
- Department of Chemistry & Bioengineering, Yichun Key Laboratory of Applied Chemistry, Key Laboratory of Jiangxi University for Applied Chemistry & Chemical Biology, Yichun University, Yichun 336000, China
| | - Huai-Bo Zou
- Department of Chemistry & Bioengineering, Yichun Key Laboratory of Applied Chemistry, Key Laboratory of Jiangxi University for Applied Chemistry & Chemical Biology, Yichun University, Yichun 336000, China
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3
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Lee WCC, Zhang XP. Metalloradical Catalysis: General Approach for Controlling Reactivity and Selectivity of Homolytic Radical Reactions. Angew Chem Int Ed Engl 2024; 63:e202320243. [PMID: 38472114 PMCID: PMC11097140 DOI: 10.1002/anie.202320243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 03/11/2024] [Accepted: 03/12/2024] [Indexed: 03/14/2024]
Abstract
Since Friedrich Wöhler's groundbreaking synthesis of urea in 1828, organic synthesis over the past two centuries has predominantly relied on the exploration and utilization of chemical reactions rooted in two-electron heterolytic ionic chemistry. While one-electron homolytic radical chemistry is both rich in fundamental reactivities and attractive with practical advantages, the synthetic application of radical reactions has been long hampered by the formidable challenges associated with the control over reactivity and selectivity of high-energy radical intermediates. To fully harness the untapped potential of radical chemistry for organic synthesis, there is a pressing need to formulate radically different concepts and broadly applicable strategies to address these outstanding issues. In pursuit of this objective, researchers have been actively developing metalloradical catalysis (MRC) as a comprehensive framework to guide the design of general approaches for controlling over reactivity and stereoselectivity of homolytic radical reactions. Essentially, MRC exploits the metal-centered radicals present in open-shell metal complexes as one-electron catalysts for homolytic activation of substrates to generate metal-entangled organic radicals as the key intermediates to govern the reaction pathway and stereochemical course of subsequent catalytic radical processes. Different from the conventional two-electron catalysis by transition metal complexes, MRC operates through one-electron chemistry utilizing stepwise radical mechanisms.
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Affiliation(s)
- Wan-Chen Cindy Lee
- Department of Chemistry, Boston College, Merkert Chemistry Center, Chestnut Hill, Massachusetts 02467 (USA)
| | - X. Peter Zhang
- Department of Chemistry, Boston College, Merkert Chemistry Center, Chestnut Hill, Massachusetts 02467 (USA)
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4
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Zhang Z, Slak D, Krebs T, Leuschner M, Schmickler N, Kuchuk E, Schmidt J, Domenianni LI, Kleine Büning JB, Grimme S, Vöhringer P, Gansäuer A. A Chiral Titanocene Complex as Regiodivergent Photoredox Catalyst: Synthetic Scope and Mechanism of Catalyst Generation. J Am Chem Soc 2023. [PMID: 38016173 DOI: 10.1021/jacs.3c08029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
We describe a combined synthetic, spectroscopic, and computational study of a chiral titanocene complex as a regiodivergent photoredox catalyst (PRC). With Kagan's complex catCl2 either monoprotected 1,3-diols or 1,4-diols can be obtained in high selectivity from a common epoxide substrate in a regiodivergent epoxide opening depending on which enantiomer of the catalyst is employed. Due to the catalyst-controlled regioselectivity of ring opening and the broader substrate scope, the PRC with catCl2 is also a highly attractive branching point for diversity-oriented synthesis. The photochemical processes of cat(NCS)2, a suitable model for catCl2, were probed by time-correlated single-photon counting. The photoexcited complex displays a thermally activated delayed fluorescence as a result of a singlet-triplet equilibration, S1 ⇄ T1, via intersystem crossing and recrossing. Its triplet state is quenched by electron transfer to the T1 state. Computational and cyclic voltammetry studies highlight the importance of our sulfonamide additive. By bonding to sulfonamide additives, chloride abstraction from [catCl2]- is facilitated, and catalyst deactivation by coordination of the sulfonamide group is circumvented.
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Affiliation(s)
- Zhenhua Zhang
- Kekulé Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Daniel Slak
- Kekulé Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Tim Krebs
- Kekulé Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Marcel Leuschner
- Kekulé Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Niklas Schmickler
- Kekulé Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Ekaterina Kuchuk
- Kekulé Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Jonas Schmidt
- Clausius Institute for Physical and Theoretical Chemistry, Universität Bonn, Wegelerstraße 12, 53115 Bonn, Germany
| | - Luis Ignacio Domenianni
- Clausius Institute for Physical and Theoretical Chemistry, Universität Bonn, Wegelerstraße 12, 53115 Bonn, Germany
| | - Julius B Kleine Büning
- Mulliken Center for Theoretical Chemistry, Clausius Institute for Physical and Theoretical Chemistry, Universität Bonn, Beringstraße 4, 53115 Bonn, Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Clausius Institute for Physical and Theoretical Chemistry, Universität Bonn, Beringstraße 4, 53115 Bonn, Germany
| | - Peter Vöhringer
- Clausius Institute for Physical and Theoretical Chemistry, Universität Bonn, Wegelerstraße 12, 53115 Bonn, Germany
| | - Andreas Gansäuer
- Kekulé Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
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5
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Liu J, Du YY, He YS, Liang Y, Liu SZ, Li YY, Cao YM. Parallel kinetic resolution of aziridines via chiral phosphoric acid-catalyzed apparent hydrolytic ring-opening. Chem Sci 2023; 14:12152-12159. [PMID: 37969581 PMCID: PMC10631200 DOI: 10.1039/d3sc03899h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 10/10/2023] [Indexed: 11/17/2023] Open
Abstract
We report a chiral phosphoric acid catalyzed apparent hydrolytic ring-opening reaction of racemic aziridines in a regiodivergent parallel kinetic resolution manner. Harnessing the acyloxy-assisted strategy, the highly stereocontrolled nucleophilic ring-opening of aziridines with water is achieved. Different kinds of aziridines are applicable in the process, giving a variety of enantioenriched aromatic or aliphatic amino alcohols with up to 99% yields and up to >99.5 : 0.5 enantiomeric ratio. Preliminary mechanistic study as well as product elaborations were inducted as well.
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Affiliation(s)
- Juan Liu
- College of Science & China Key Laboratory of National Forestry and Grassland Administration on Pest Chemical Control, China Agricultural University Beijing 100193 China
| | - Yi-Ying Du
- College of Science & China Key Laboratory of National Forestry and Grassland Administration on Pest Chemical Control, China Agricultural University Beijing 100193 China
| | - Yu-Shi He
- College of Science & China Key Laboratory of National Forestry and Grassland Administration on Pest Chemical Control, China Agricultural University Beijing 100193 China
| | - Yan Liang
- College of Science & China Key Laboratory of National Forestry and Grassland Administration on Pest Chemical Control, China Agricultural University Beijing 100193 China
| | - Shang-Zhong Liu
- College of Science & China Key Laboratory of National Forestry and Grassland Administration on Pest Chemical Control, China Agricultural University Beijing 100193 China
| | - Yi-Yi Li
- College of Science & China Key Laboratory of National Forestry and Grassland Administration on Pest Chemical Control, China Agricultural University Beijing 100193 China
| | - Yi-Ming Cao
- College of Science & China Key Laboratory of National Forestry and Grassland Administration on Pest Chemical Control, China Agricultural University Beijing 100193 China
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6
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Wen L, Ding J, Duan L, Wang S, An Q, Wang H, Zuo Z. Multiplicative enhancement of stereoenrichment by a single catalyst for deracemization of alcohols. Science 2023; 382:458-464. [PMID: 37883537 DOI: 10.1126/science.adj0040] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 09/04/2023] [Indexed: 10/28/2023]
Abstract
Stereochemical enrichment of a racemic mixture by deracemization must overcome unfavorable entropic effects as well as the principle of microscopic reversibility; recently, photochemical reaction pathways unveiled by the energetic input of light have led to innovations toward this end, most often by ablation of a stereogenic C(sp3)-H bond. We report a photochemically driven deracemization protocol in which a single chiral catalyst effects two mechanistically different steps, C-C bond cleavage and C-C bond formation, to achieve multiplicative enhancement of stereoinduction, which leads to high levels of stereoselectivity. Ligand-to-metal charge transfer excitation of a titanium catalyst coordinated by a chiral phosphoric acid or bisoxazoline efficiently enriches racemic alcohols that feature adjacent and fully substituted stereogenic centers to enantiomeric ratios up to 99:1. Mechanistic investigations support a pathway of sequential radical-mediated bond scission and bond formation through a common prochiral intermediate and reveal that, although the overall stereoenrichment is high, the selectivity in each individual step is moderate.
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Affiliation(s)
- Lu Wen
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Jia Ding
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Lingfei Duan
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Shun Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Qing An
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Hexiang Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Zhiwei Zuo
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
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7
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Hilche T, Krebs T, Weißbarth H, Lang F, Schnakenburg G, Gansäuer A. Enantio- and Diastereomerically Pure Titanocenes by Dynamic Conformational Locking. Chemistry 2023; 29:e202301645. [PMID: 37283199 DOI: 10.1002/chem.202301645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 06/05/2023] [Accepted: 06/05/2023] [Indexed: 06/08/2023]
Abstract
The synthesis of enantiomerically pure titanocenes is limited to cases with enantiomerically pure substituents at the cyclopentadienyl ligands and to ansa-titanocenes. For the latter complexes, the use of achiral ligands requires a resolution of enantiomers and frequently also a separation of the diastereoisomers obtained after metalation. Here, we introduce a new synthetic method that relies on the use of enantiomerically pure camphorsulfonate (CSA) ligands as control elements for the absolute and relative configuration of titanocene complexes. Starting from the conformationally flexible (RC5 H4 )2 TiCl2 , the desired conformationally locked and hence enantio- and diastereomerically pure complexes (RC5 H4 )2 Ti(CSA)2 are obtained in just two steps. According to X-ray crystallography the (RC5 H4 )2 Ti fragment is essentially C2 -symmetric and nuclear magnetic resonance displays overall C2 -symmetry. We applied density functional theory methods to unravel the dynamics of the complexes and the mechanisms and selectivities of their formation.
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Affiliation(s)
- Tobias Hilche
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Tim Krebs
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Hendrik Weißbarth
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Fabian Lang
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Gregor Schnakenburg
- Institut für Anorganische Chemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
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8
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Jana A, Chakraborty S, Sarkar K, Maji B. Ruthenium-Catalyzed Reductive Coupling of Epoxides with Primary Alcohols via Hydrogen Transfer Catalysis. J Org Chem 2023; 88:310-318. [PMID: 36546672 DOI: 10.1021/acs.joc.2c02354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Herein, we report the ruthenium-catalyzed synthesis of β-alkylated secondary alcohols via the regioselective ring-opening of epoxides with feedstock primary alcohols. The reaction utilized alcohol as the carbon source and the terminal reductant. Kinetic and labeling experiments elucidate the hydrogen transfer catalysis that operates via tandem Markovnikov selective transfer hydrogenation of terminal epoxides and hydrogen transfer-mediated cross-coupling of the resulting alcohol with primary alcohol substrates. A broad scope (40 examples including drugs/natural product derivatives) and excellent regioselectivity for a variety of substrates were shown.
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Affiliation(s)
- Akash Jana
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Sayandip Chakraborty
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Koushik Sarkar
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Biplab Maji
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
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9
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Lin Q, Tong W, Shu XZ, Chen Y. Ti-Catalyzed Dehydroxylation of Tertiary Alcohols. Org Lett 2022; 24:8459-8464. [DOI: 10.1021/acs.orglett.2c03119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Quan Lin
- School of Materials Science and Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, People’s Republic of China
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Road, Shanghai 200444, People’s Republic of China
| | - Weiqi Tong
- Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Road, Shanghai 200444, People’s Republic of China
| | - Xing-Zhong Shu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, People’s Republic of China
| | - Yunrong Chen
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Road, Shanghai 200444, People’s Republic of China
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10
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Chen Y, Gong H, Cheng L, Lin Q. Recent Progress on Transition-Metal-Mediated Reductive C(sp3)–O Bond Radical Addition and Coupling Reactions. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1848-3005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractIn this short review, we summarize the recent developments on thermo-driven C(sp3)–O bond radical scission methods and their applications in the construction of C(sp3)–C bonds via conjugate addition with activated double bonds and reductive coupling mediated by economic 3d metals, in particular nickel. We have arranged the review based on three approaches for C(sp3)–O bond radical scission (vide infra). After generating the radical intermediates, their subsequent transformation into C(sp3)–C bonds enabled by C(sp3)–O cross-electrophile coupling with carbon electrophiles is discussed in detail.1 Introduction2 Direct Single-Electron Transfer to a C(sp3)–O Bond3 Radical Scission of Activated C(sp3)–O Bonds via Single-Electron Transfer to Protecting Groups4 In Situ Activation of Alcohols5 Summary and Outlook
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Affiliation(s)
- Yunrong Chen
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, Shanghai University
| | - Hegui Gong
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, Shanghai University
| | - Li Cheng
- School of Materials Science and Engineering, Shanghai University
| | - Quan Lin
- School of Materials Science and Engineering, Shanghai University
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11
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Wang Z, Li B. Iridium‐Catalyzed Regiodivergent and Enantioselective Hydroalkynylation of Unactivated 1,1‐Disubstituted Alkenes. Angew Chem Int Ed Engl 2022; 61:e202201099. [DOI: 10.1002/anie.202201099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Indexed: 11/12/2022]
Affiliation(s)
- Zi‐Xuan Wang
- Center of Basic Molecular Science (CBMS) Department of Chemistry Tsinghua University Beijing 100084 China
| | - Bi‐Jie Li
- Center of Basic Molecular Science (CBMS) Department of Chemistry Tsinghua University Beijing 100084 China
- Beijing National Laboratory for Molecular Sciences Beijing 100190 China
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12
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Wang Z, Li B. Iridium‐Catalyzed Regiodivergent and Enantioselective Hydroalkynylation of Unactivated 1,1‐Disubstituted Alkenes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zi‐Xuan Wang
- Center of Basic Molecular Science (CBMS) Department of Chemistry Tsinghua University Beijing 100084 China
| | - Bi‐Jie Li
- Center of Basic Molecular Science (CBMS) Department of Chemistry Tsinghua University Beijing 100084 China
- Beijing National Laboratory for Molecular Sciences Beijing 100190 China
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13
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Mondal S, Dumur F, Gigmes D, Sibi MP, Bertrand MP, Nechab M. Enantioselective Radical Reactions Using Chiral Catalysts. Chem Rev 2022; 122:5842-5976. [DOI: 10.1021/acs.chemrev.1c00582] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Shovan Mondal
- Department of Chemistry, Syamsundar College, Shyamsundar 713424, West Bengal, India
| | - Frédéric Dumur
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire UMR 7273, F-13390e Marseille, France
| | - Didier Gigmes
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire UMR 7273, F-13390e Marseille, France
| | - Mukund P. Sibi
- Department of Chemistry and Biochemistry North Dakota State University, Fargo, North Dakota 58108, United States
| | - Michèle P. Bertrand
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire UMR 7273, F-13390e Marseille, France
| | - Malek Nechab
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire UMR 7273, F-13390e Marseille, France
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14
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Zhou M, Wolzak LA, Li Z, de Zwart FJ, Mathew S, de Bruin B. Catalytic Synthesis of 1 H-2-Benzoxocins: Cobalt(III)-Carbene Radical Approach to 8-Membered Heterocyclic Enol Ethers. J Am Chem Soc 2021; 143:20501-20512. [PMID: 34802239 PMCID: PMC8662738 DOI: 10.1021/jacs.1c10927] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Indexed: 12/30/2022]
Abstract
The metallo-radical activation of ortho-allylcarbonyl-aryl N-arylsulfonylhydrazones with the paramagnetic cobalt(II) porphyrin catalyst [CoII(TPP)] (TPP = tetraphenylporphyrin) provides an efficient and powerful method for the synthesis of novel 8-membered heterocyclic enol ethers. The synthetic protocol is versatile and practical and enables the synthesis of a wide range of unique 1H-2-benzoxocins in high yields. The catalytic cyclization reactions proceed with excellent chemoselectivities, have a high functional group tolerance, and provide several opportunities for the synthesis of new bioactive compounds. The reactions are shown to proceed via cobalt(III)-carbene radical intermediates, which are involved in intramolecular hydrogen transfer (HAT) from the allylic position to the carbene radical, followed by a near-barrierless radical rebound step in the coordination sphere of cobalt. The proposed mechanism is supported by experimental observations, density functional theory (DFT) calculations, and spin trapping experiments.
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Affiliation(s)
- Minghui Zhou
- Homogeneous,
Supramolecular and Bio-Inspired Catalysis (HomKat) group, Van ‘t
Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Lukas A. Wolzak
- Homogeneous,
Supramolecular and Bio-Inspired Catalysis (HomKat) group, Van ‘t
Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Zirui Li
- Department
of Bioorganic Synthesis, Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333
CC Leiden, The Netherlands
| | - Felix J. de Zwart
- Homogeneous,
Supramolecular and Bio-Inspired Catalysis (HomKat) group, Van ‘t
Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Simon Mathew
- Homogeneous,
Supramolecular and Bio-Inspired Catalysis (HomKat) group, Van ‘t
Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Bas de Bruin
- Homogeneous,
Supramolecular and Bio-Inspired Catalysis (HomKat) group, Van ‘t
Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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15
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Zhang Z, Stückrath JB, Grimme S, Gansäuer A. Titanocene‐Catalyzed [2+2] Cycloaddition of Bisenones and Comparison with Photoredox Catalysis and Established Methods. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102739] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Zhenhua Zhang
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Strasse 1 53121 Bonn Germany
| | - Julius B. Stückrath
- Mulliken Center for Theoretical Chemistry Institut für Physikalische und Theoretische Chemie Universität Bonn Beringstrasse 4 53115 Bonn Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry Institut für Physikalische und Theoretische Chemie Universität Bonn Beringstrasse 4 53115 Bonn Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Strasse 1 53121 Bonn Germany
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16
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Zhang Z, Stückrath JB, Grimme S, Gansäuer A. Titanocene-Catalyzed [2+2] Cycloaddition of Bisenones and Comparison with Photoredox Catalysis and Established Methods. Angew Chem Int Ed Engl 2021; 60:14339-14344. [PMID: 33871126 PMCID: PMC8251790 DOI: 10.1002/anie.202102739] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Indexed: 12/17/2022]
Abstract
Cp2 Ti(TFA) is a broadly applicable catalyst for the [2+2] cycloaddition of bisenones by inner-sphere electron transfer. The attractiveness of this mechanism is shown by comparison with outer-sphere ET methods. DFT calculations show that the reaction proceeds through a unique unfavorable 5-exo (the rate-determining step) and a favorable 4-exo cyclization.
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Affiliation(s)
- Zhenhua Zhang
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard-Domagk-Strasse 153121BonnGermany
| | - Julius B. Stückrath
- Mulliken Center for Theoretical ChemistryInstitut für Physikalische und Theoretische ChemieUniversität BonnBeringstrasse 453115BonnGermany
| | - Stefan Grimme
- Mulliken Center for Theoretical ChemistryInstitut für Physikalische und Theoretische ChemieUniversität BonnBeringstrasse 453115BonnGermany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard-Domagk-Strasse 153121BonnGermany
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17
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Gianga TM, Pantoș GD. Structurally divergent dynamic combinatorial chemistry on racemic mixtures. Nat Commun 2020; 11:3528. [PMID: 32669543 PMCID: PMC7363883 DOI: 10.1038/s41467-020-17321-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 06/16/2020] [Indexed: 11/09/2022] Open
Abstract
Structurally Divergent Reactions on Racemic Mixtures are atypical processes in Nature. The few examples reported in the literature take place in organic solvents and are driven by the reagents’ interaction with bulky chiral catalysts. Herein, we describe a dynamic combinatorial approach to generate structural divergence from racemic building blocks. The divergence is due to a stereospecific electron-donor – electron-acceptor interaction of diastereomeric macrocycles, leading to structurally distinct pseudorotaxanes. The equilibrated dynamic combinatorial library contains, amongst various macrocycles, two different types of [2]catenanes that are non-isomeric. The formation of these [2]catenanes is due to a spontaneous stereo and structurally divergent assembly of the building blocks. Structurally divergent reactions on racemic mixtures, which produce distinct chemical species from an enantiomeric mixture, are extremely rare in the literature. Here, the authors are able to use a dynamic combinatorial approach to yield structurally divergent, non-isomeric [2]catenanes from an enantiomeric mixture.
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Affiliation(s)
- Tiberiu-M Gianga
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.,Beamline B23, Diamond Light Source, Ltd., Chilton, Didcot, OX11 0DE, UK
| | - G Dan Pantoș
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
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18
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Affiliation(s)
- Yuqing Chen
- Zhang Dayu School of Chemistry State Key Laboratory of Fine ChemicalsDalian University of Technology Dalian 116024 China
| | - Shuangjie Lin
- Zhang Dayu School of Chemistry State Key Laboratory of Fine ChemicalsDalian University of Technology Dalian 116024 China
| | - Fusheng Li
- Zhang Dayu School of Chemistry State Key Laboratory of Fine ChemicalsDalian University of Technology Dalian 116024 China
| | - Xinhai Zhang
- School of Traffic and Materials EngineeringHebi Polytechnic Hebi 458030 China
| | - Luqing Lin
- Zhang Dayu School of Chemistry State Key Laboratory of Fine ChemicalsDalian University of Technology Dalian 116024 China
| | - Lei Shi
- Zhang Dayu School of Chemistry State Key Laboratory of Fine ChemicalsDalian University of Technology Dalian 116024 China
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19
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Parasram M, Shields BJ, Ahmad O, Knauber T, Doyle AG. Regioselective Cross-Electrophile Coupling of Epoxides and (Hetero)aryl Iodides via Ni/Ti/Photoredox Catalysis. ACS Catal 2020; 10:5821-5827. [PMID: 32747870 PMCID: PMC7398156 DOI: 10.1021/acscatal.0c01199] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A cross-electrophile coupling reaction of epoxides and (hetero)aryl iodides that operates via the merger of three catalytic cycles involving a Ni-, Ti-, and organic photoredox catalyst has been developed. Three distinct classes of epoxides, styrene oxides, cyclic epoxides, and terminal aliphatic epoxides, all undergo coupling in moderate to good yield and high regioselectivity with the use of three different nitrogen-based ligands for Ni under otherwise identical reaction conditions. The mild reaction conditions accommodate a broad scope of abundant and complex coupling partners. Mechanistic studies suggest that when styrene oxides are employed radical intermediates are involved via Ti-radical ring-opening of the epoxide. Conversely, for terminal aliphatic epoxides, involvement of an iodohydrin intermediate enables the formation of the unexpected linear product.
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Affiliation(s)
- Marvin Parasram
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Benjamin J Shields
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Omar Ahmad
- Blueprint Medicines, Cambridge, Massachusetts 02139, United States
| | - Thomas Knauber
- Worldwide Research and Development, Pfizer, Inc., Groton, Connecticut 06340, United States
| | - Abigail G Doyle
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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20
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Manßen M, Schafer LL. Titanium catalysis for the synthesis of fine chemicals – development and trends. Chem Soc Rev 2020; 49:6947-6994. [DOI: 10.1039/d0cs00229a] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Atlas as a Titan(ium) is holding the earth-abundant chemistry world. Titanium is the second most abundant transition metal, is a key player in important industrial processes (e.g. polyethylene) and shows much promise for diverse applications in the future.
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Affiliation(s)
- Manfred Manßen
- The Department of Chemistry
- The University of British Columbia
- Vancouver
- Canada
| | - Laurel L. Schafer
- The Department of Chemistry
- The University of British Columbia
- Vancouver
- Canada
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21
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Abstract
New catalytic strategies that leverage single-electron redox events have provided chemists with useful tools for solving synthetic problems. In this context, Ti offers opportunities that are complementary to late transition metals for reaction discovery. Following foundational work on epoxide reductive functionalization, recent methodological advances have significantly expanded the repertoire of Ti radical chemistry. This Synopsis summarizes recent developments in the burgeoning area of Ti radical catalysis with a focus on innovative catalytic strategies such as radical redox-relay and dual catalysis.
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Affiliation(s)
- Terry McCallum
- Department of Chemistry and Chemical Biology , Cornell University , Ithaca , New York 14853 , United States
| | - Xiangyu Wu
- Department of Chemistry and Chemical Biology , Cornell University , Ithaca , New York 14853 , United States
| | - Song Lin
- Department of Chemistry and Chemical Biology , Cornell University , Ithaca , New York 14853 , United States
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22
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Mühlhaus F, Weißbarth H, Dahmen T, Schnakenburg G, Gansäuer A. Merging Regiodivergent Catalysis with Atom-Economical Radical Arylation. Angew Chem Int Ed Engl 2019; 58:14208-14212. [PMID: 31394024 PMCID: PMC6852184 DOI: 10.1002/anie.201908860] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Indexed: 12/11/2022]
Abstract
A titanocene-catalyzed regiodivergent radical arylation is described that allows access to either enantiomerically pure tetrahydroquinolines or indolines from a common starting material. The regioselectivity of epoxide opening that results in the high selectivity of heterocycle formation is controlled by two factors, the absolute configuration of the enantiopure ligands of the (C5 H4 R)2 TiX2 catalyst and the inorganic ligand X (X=Cl, OTs). The overall reaction is atom-economical and constitutes a radical Friedel-Crafts alkylation.
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Affiliation(s)
- Felix Mühlhaus
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
| | - Hendrik Weißbarth
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
| | - Tobias Dahmen
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
| | - Gregor Schnakenburg
- Institut für Anorganische ChemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
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23
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Mühlhaus F, Weißbarth H, Dahmen T, Schnakenburg G, Gansäuer A. Merging Regiodivergent Catalysis with Atom‐Economical Radical Arylation. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908860] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Felix Mühlhaus
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
| | - Hendrik Weißbarth
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
| | - Tobias Dahmen
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
| | - Gregor Schnakenburg
- Institut für Anorganische Chemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
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24
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Lang K, Torker S, Wojtas L, Zhang XP. Asymmetric Induction and Enantiodivergence in Catalytic Radical C-H Amination via Enantiodifferentiative H-Atom Abstraction and Stereoretentive Radical Substitution. J Am Chem Soc 2019; 141:12388-12396. [PMID: 31280562 DOI: 10.1021/jacs.9b05850] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Control of enantioselectivity remains a major challenge in radical chemistry. The emergence of metalloradical catalysis (MRC) offers a conceptually new strategy for addressing this and other outstanding issues. Through the employment of D2-symmetric chiral amidoporphyrins as the supporting ligands, Co(II)-based MRC has enabled the development of new catalytic systems for asymmetric radical transformations with a unique profile of reactivity and selectivity. With the support of new-generation HuPhyrin chiral ligands whose cavity environment can be fine-tuned, the Co-centered d-radicals enable to address challenging issues that require exquisite control of fundamental radical processes. As showcased with asymmetric 1,5-C-H amination of sulfamoyl azides, the enantiocontrol of which has proven difficult, the judicious use of HuPhyrin ligand by tuning the bridge length and other remote nonchiral elements allows for controlling both the degree and sense of asymmetric induction in a systematic manner. This effort leads to successful development of new Co(II)-based catalytic systems that are highly effective for enantiodivergent radical 1,5-C-H amination, producing both enantiomers of the strained five-membered cyclic sulfamides with excellent enantioselectivities. Detailed deuterium-labeling studies, together with DFT computation, have revealed an unprecedented mode of asymmetric induction that consists of enantiodifferentiative H-atom abstraction and stereoretentive radical substitution.
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Affiliation(s)
- Kai Lang
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill, Massachusetts 02467 , United States
| | - Sebastian Torker
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill, Massachusetts 02467 , United States
| | - Lukasz Wojtas
- Department of Chemistry , University of South Florida , Tampa , Florida 33620 , United States
| | - X Peter Zhang
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill, Massachusetts 02467 , United States
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25
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Hu Y, Lang K, Tao J, Marshall MK, Cheng Q, Cui X, Wojtas L, Zhang XP. Next-Generation D 2 -Symmetric Chiral Porphyrins for Cobalt(II)-Based Metalloradical Catalysis: Catalyst Engineering by Distal Bridging. Angew Chem Int Ed Engl 2019; 58:2670-2674. [PMID: 30601601 PMCID: PMC6456056 DOI: 10.1002/anie.201812379] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Indexed: 11/09/2022]
Abstract
Novel D2 -symmetric chiral amidoporphyrins with alkyl bridges across two chiral amide units on both sides of the porphyrin plane (designated "HuPhyrin") have been effectively constructed in a modular fashion to permit variation of the bridge length. The CoII complexes of HuPhyrin, [Co(HuPhyrin)], represent new-generation metalloradical catalysts where the metal-centered d-radical is situated inside a cavity-like ligand with a more rigid chiral environment and enhanced hydrogen-bonding capability. As demonstrated with cyclopropanation and aziridination as model reactions, the bridged [Co(HuPhyrin)] functions notably different from the open catalysts, exhibiting significant enhancement in both reactivity and stereoselectivity. Furthermore, the length of the distal alkyl bridge can have a remarkable influence on the catalytic properties.
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Affiliation(s)
- Yang Hu
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - Kai Lang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Jingran Tao
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | | | - Qigan Cheng
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - Xin Cui
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - Lukasz Wojtas
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - X Peter Zhang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
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26
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Leijendekker LH, Weweler J, Leuther TM, Kratzert D, Streuff J. Development, Scope, and Applications of Titanium(III)-Catalyzed Cyclizations to Aminated N-Heterocycles. Chemistry 2019; 25:3382-3390. [PMID: 30615817 DOI: 10.1002/chem.201805909] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Indexed: 01/30/2023]
Affiliation(s)
- Leonardus H. Leijendekker
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstr. 21 79104 Freiburg im Breisgau Germany
| | - Jens Weweler
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstr. 21 79104 Freiburg im Breisgau Germany
| | - Tobias M. Leuther
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstr. 21 79104 Freiburg im Breisgau Germany
| | - Daniel Kratzert
- Institut für Anorganische und Analytische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstr. 21 79104 Freiburg im Breisgau Germany
| | - Jan Streuff
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstr. 21 79104 Freiburg im Breisgau Germany
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27
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Hu Y, Lang K, Tao J, Marshall MK, Cheng Q, Cui X, Wojtas L, Zhang XP. Next‐Generation
D
2
‐Symmetric Chiral Porphyrins for Cobalt(II)‐Based Metalloradical Catalysis: Catalyst Engineering by Distal Bridging. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812379] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yang Hu
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Kai Lang
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Jingran Tao
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | | | - Qigan Cheng
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Xin Cui
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Lukasz Wojtas
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - X. Peter Zhang
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
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28
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Beaumier EP, Pearce AJ, See XY, Tonks IA. Modern applications of low-valent early transition metals in synthesis and catalysis. Nat Rev Chem 2019; 3:15-34. [PMID: 30989127 PMCID: PMC6462221 DOI: 10.1038/s41570-018-0059-x] [Citation(s) in RCA: 132] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Low-valent early transition metals are often intrinsically highly reactive as a result of their strong propensity toward oxidation to more stable high-valent states. Harnessing these highly reducing complexes for productive reactivity is potentially powerful for C-C bond construction, organic reductions, small-molecule activation and many other reactions that offer orthogonal chemoselectivity and/or regioselectivity patterns to processes promoted by late transition metals. Recent years have seen many exciting new applications of low-valent metals through building new catalytic and/or multicomponent reaction manifolds out of classical reactivity patterns. In this Review, we survey new methods that employ early transition metals and invoke low-valent precursors or intermediates in order to identify common themes and strategies in synthesis and catalysis.
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Affiliation(s)
- Evan P. Beaumier
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
| | - Adam J. Pearce
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
| | - Xin Yi See
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
| | - Ian A. Tonks
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
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29
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Li C, Lang K, Lu H, Hu Y, Cui X, Wojtas L, Zhang XP. Catalytic Radical Process for Enantioselective Amination of C(sp 3 )-H Bonds. Angew Chem Int Ed Engl 2018; 57:16837-16841. [PMID: 30347505 PMCID: PMC6339699 DOI: 10.1002/anie.201808923] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Indexed: 12/20/2022]
Abstract
A new catalytic radical system involving CoII -based metalloradical catalysis is effective in activating sulfamoyl azides for enantioselective radical 1,6-amination of C(sp3 )-H bonds, affording six-membered chiral heterocyclic sulfamides in high yields with excellent enantioselectivities. The CoII -catalyzed C-H amination features an unusual degree of functional-group tolerance and chemoselectivity. The unique reactivity and stereoselectivity is attributed to the underlying stepwise radical pathway. The resulting optically active cyclic sulfamides can be readily converted into synthetically useful chiral 1,3-diamine derivatives without loss in enantiopurity.
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Affiliation(s)
- Chaoqun Li
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Kai Lang
- Department of Chemistry, Merkert Chemistry Center Boston College, Chestnut Hill, MA 02467 (USA)
| | - Hongjian Lu
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Yang Hu
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Xin Cui
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Lukasz Wojtas
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - X. Peter Zhang
- Department of Chemistry, Merkert Chemistry Center Boston College, Chestnut Hill, MA 02467 (USA)
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30
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Li C, Lang K, Lu H, Hu Y, Cui X, Wojtas L, Zhang XP. Catalytic Radical Process for Enantioselective Amination of C(sp
3
)−H Bonds. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808923] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chaoqun Li
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Kai Lang
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Hongjian Lu
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Yang Hu
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Xin Cui
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Lukasz Wojtas
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - X. Peter Zhang
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
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31
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Cao YM, Lentz D, Christmann M. Synthesis of Enantioenriched Bromohydrins via Divergent Reactions of Racemic Intermediates from Anchimeric Oxygen Borrowing. J Am Chem Soc 2018; 140:10677-10681. [PMID: 30099869 DOI: 10.1021/jacs.8b06432] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We report a chiral phosphoric acid catalyzed bromocyclization/regiodivergent reaction of racemic intermediates sequence, which is enabled by anchimeric oxygen borrowing. Different types of alkenes are applicable, and both enantiomers of the bromohydrin products were obtained in generally excellent yields and enantioselectivities. In addition, an example of enantioconvergent synthesis from the two isomeric products is presented.
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Affiliation(s)
- Yi-Ming Cao
- Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustraße 3 , 14195 Berlin , Germany
| | - Dieter Lentz
- Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustraße 3 , 14195 Berlin , Germany
| | - Mathias Christmann
- Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustraße 3 , 14195 Berlin , Germany
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32
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Kisan HK, Sunoj RB. Insights on the Origin of Regiodivergence in the Parallel Kinetic Resolution of rac-Aziridines Using a Chiral Lanthanum–Yttrium Bimetallic Catalyst. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02435] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Hemanta K. Kisan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Raghavan B. Sunoj
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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33
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Hao W, Harenberg JH, Wu X, MacMillan SN, Lin S. Diastereo- and Enantioselective Formal [3 + 2] Cycloaddition of Cyclopropyl Ketones and Alkenes via Ti-Catalyzed Radical Redox Relay. J Am Chem Soc 2018; 140:3514-3517. [DOI: 10.1021/jacs.7b13710] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Wei Hao
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Johannes H. Harenberg
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
- Department Chemie, Ludwig-Maximilians-Universität München, Munich, 81377, Germany
| | - Xiangyu Wu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Samantha N. MacMillan
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Song Lin
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
- Atkinson Center for a Sustainable Future, Cornell University, Ithaca, New York 14853, United States
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34
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Wang K, Kong W. Recent Advances in Transition Metal-Catalyzed Asymmetric Radical Reactions. CHINESE J CHEM 2018. [DOI: 10.1002/cjoc.201700745] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Kuai Wang
- Institute for Advanced Studies; Wuhan University, 299 Bayi Road, Wuchang District; Wuhan Hubei 430072 China
| | - Wangqing Kong
- Institute for Advanced Studies; Wuhan University, 299 Bayi Road, Wuchang District; Wuhan Hubei 430072 China
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35
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Peng XX, Wei D, Han WJ, Chen F, Yu W, Han B. Dioxygen Activation via Cu-Catalyzed Cascade Radical Reaction: An Approach to Isoxazoline/Cyclic Nitrone-Featured α-Ketols. ACS Catal 2017. [DOI: 10.1021/acscatal.7b03078] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xie-Xue Peng
- State Key Laboratory of Applied Organic
Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People’s Republic of China
| | - Dian Wei
- State Key Laboratory of Applied Organic
Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People’s Republic of China
| | - Wen-Jun Han
- State Key Laboratory of Applied Organic
Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People’s Republic of China
| | - Fei Chen
- State Key Laboratory of Applied Organic
Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People’s Republic of China
| | - Wei Yu
- State Key Laboratory of Applied Organic
Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People’s Republic of China
| | - Bing Han
- State Key Laboratory of Applied Organic
Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People’s Republic of China
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36
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Miyabe H. Unique Strategies for Controlling Enantioselective Stereochemistry of Cyclizations via Radical Intermediates. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700036] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Hideto Miyabe
- School of Pharmacy; Hyogo University of Health Sciences; 650-8530 Minatojima, Chuo-ku Kobe Japan
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37
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Miyabe H, Kawashima A, Yoshioka E, Kohtani S. Progress in Enantioselective Radical Cyclizations. Chemistry 2017; 23:6225-6236. [DOI: 10.1002/chem.201603124] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Hideto Miyabe
- School of Pharmacy; Hyogo University of Health Sciences, Minatojima, Chuo-ku; Kobe 650-8530 Japan
| | - Akira Kawashima
- School of Pharmacy; Hyogo University of Health Sciences, Minatojima, Chuo-ku; Kobe 650-8530 Japan
| | - Eito Yoshioka
- School of Pharmacy; Hyogo University of Health Sciences, Minatojima, Chuo-ku; Kobe 650-8530 Japan
| | - Shigeru Kohtani
- School of Pharmacy; Hyogo University of Health Sciences, Minatojima, Chuo-ku; Kobe 650-8530 Japan
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38
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Andreas Gansäuer. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/anie.201607115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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39
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Andreas Gansäuer. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201607115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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40
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Kumar P, Tripathi D, Sharma BM, Dwivedi N. Transition metal catalysis—a unique road map in the stereoselective synthesis of 1,3-polyols. Org Biomol Chem 2017; 15:733-761. [DOI: 10.1039/c6ob01925k] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The present review summarizes recent diverse reactions employed in the formation of 1,3-polyols providing an overview of the mechanistic pathway and the enantioselectivity obtained, in terms of the properties of transition metals directly involved in the catalytic transformations and their interaction with various ligands.
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Affiliation(s)
- Pradeep Kumar
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - Divya Tripathi
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - Brijesh M. Sharma
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - Namrata Dwivedi
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune 411008
- India
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41
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Funken N, Zhang YQ, Gansäuer A. Regiodivergent Catalysis: A Powerful Tool for Selective Catalysis. Chemistry 2016; 23:19-32. [DOI: 10.1002/chem.201603993] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Indexed: 01/04/2023]
Affiliation(s)
- Nico Funken
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| | - Yong-Qiang Zhang
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
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42
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Funken N, Mühlhaus F, Gansäuer A. General, Highly Selective Synthesis of 1,3- and 1,4-Difunctionalized Building Blocks by Regiodivergent Epoxide Opening. Angew Chem Int Ed Engl 2016; 55:12030-4. [PMID: 27600090 DOI: 10.1002/anie.201606064] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 07/22/2016] [Indexed: 12/31/2022]
Abstract
We describe a regiodivergent epoxide opening (REO) featuring a catalyst-controlled synthesis of enantiomerically and diastereomerically highly enriched or pure syn- and anti- 1,3- and 1,4-difunctionalized building blocks from a common epoxide precursor. The REO is attractive for natural product synthesis and as a branching reaction for diversity-oriented synthesis with epoxides.
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Affiliation(s)
- Nico Funken
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, 53121, Bonn, Germany
| | - Felix Mühlhaus
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, 53121, Bonn, Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, 53121, Bonn, Germany.
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43
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Funken N, Mühlhaus F, Gansäuer A. General, Highly Selective Synthesis of 1,3- and 1,4-Difunctionalized Building Blocks by Regiodivergent Epoxide Opening. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606064] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nico Funken
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| | - Felix Mühlhaus
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
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44
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Tiddens MR, Klein Gebbink RJM, Otte M. The B(C6F5)3-Catalyzed Tandem Meinwald Rearrangement–Reductive Amination. Org Lett 2016; 18:3714-7. [DOI: 10.1021/acs.orglett.6b01744] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Martine R. Tiddens
- Organic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Universiteit Utrecht, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
| | - Robertus J. M. Klein Gebbink
- Organic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Universiteit Utrecht, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
| | - Matthias Otte
- Organic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Universiteit Utrecht, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
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45
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Gansäuer A, Hildebrandt S, Vogelsang E, Flowers Ii RA. Tuning the redox properties of the titanocene(III)/(IV)-couple for atom-economical catalysis in single electron steps. Dalton Trans 2016; 45:448-52. [PMID: 26575367 DOI: 10.1039/c5dt03891j] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Radical-based transformations are an attractive target for the development of catalytic processes due to ease of radical generation, high functional group tolerance and selectivity of bond-forming reactions. In spite of these appealing features, the potential of radicals as key intermediates in catalysis remains largely untapped. Herein we present recent work that exploits the innate ability of titanocene-based catalysts to undergo both oxidative addition and reductive elimination in single electron steps. We further demonstrate that tuning the redox properties of the titanocene-based catalyst can be used to develop efficient catalytic free radical processes including tetrahydrofuran synthesis, and radical arylation.
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Affiliation(s)
- A Gansäuer
- Kekulé-Instiut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany.
| | - S Hildebrandt
- Kekulé-Instiut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany.
| | - E Vogelsang
- Kekulé-Instiut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany.
| | - R A Flowers Ii
- Department of Chemistry, Lehigh University, Bethlehem, PA 18015, USA.
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46
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Prina Cerai G, Morandi B. Atom-economical cobalt-catalysed regioselective coupling of epoxides and aziridines with alkenes. Chem Commun (Camb) 2016; 52:9769-72. [DOI: 10.1039/c6cc04410g] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An atom-economical cobalt-catalysed regioselective coupling of epoxides and aziridines with alkenes is reported.
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Affiliation(s)
| | - Bill Morandi
- Max-Planck-Institut für Kohlenforschung
- Mülheim an der Ruhr
- Germany
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47
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Zhang YQ, Jakoby V, Stainer K, Schmer A, Klare S, Bauer M, Grimme S, Cuerva JM, Gansäuer A. Amid-substituierte Titanocene für die H-Atom-Transfer-Katalyse. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201509548] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yong-Qiang Zhang
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Verena Jakoby
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Katharina Stainer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Alexander Schmer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Sven Klare
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Mirko Bauer
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische Chemie und Theoretische Chemie; Universität Bonn; Beringstraße 4 53115 Bonn Deutschland
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische Chemie und Theoretische Chemie; Universität Bonn; Beringstraße 4 53115 Bonn Deutschland
| | - Juan Manuel Cuerva
- Department of Organic Chemistry, Faculty of Sciences; Universität Granada; 18071 Granada Spanien
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
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48
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Zhang YQ, Jakoby V, Stainer K, Schmer A, Klare S, Bauer M, Grimme S, Cuerva JM, Gansäuer A. Amide-Substituted Titanocenes in Hydrogen-Atom Transfer Catalysis. Angew Chem Int Ed Engl 2015; 55:1523-6. [DOI: 10.1002/anie.201509548] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Yong-Qiang Zhang
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
| | - Verena Jakoby
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
| | - Katharina Stainer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
| | - Alexander Schmer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
| | - Sven Klare
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
| | - Mirko Bauer
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische Chemie und Theoretische Chemie; Universität Bonn; Beringstraße 4 53115 Bonn Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische Chemie und Theoretische Chemie; Universität Bonn; Beringstraße 4 53115 Bonn Germany
| | - Juan Manuel Cuerva
- Department of Organic Chemistry, Faculty of Sciences; Universität Granada; 18071 Granada Spain
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
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49
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Streuff J, Gansäuer A. Metal-Catalyzed β-Functionalization of Michael Acceptors through Reductive Radical Addition Reactions. Angew Chem Int Ed Engl 2015; 54:14232-42. [PMID: 26471460 DOI: 10.1002/anie.201505231] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Indexed: 01/18/2023]
Abstract
Transition-metal-catalyzed radical reactions are becoming increasingly important in modern organic chemistry. They offer fascinating and unconventional ways for connecting molecular fragments that are often complementary to traditional methods. In particular, reductive radical additions to α,β-unsaturated compounds have recently gained substantial attention as a result of their broad applicability in organic synthesis. This Minireview critically discusses the recent landmark achievements in this field in context with earlier reports that laid the foundation for today's developments.
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Affiliation(s)
- Jan Streuff
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg (Germany).
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn (Germany).
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50
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Streuff J, Gansäuer A. Metallkatalysierte β-Funktionalisierung von Michael-Akzeptoren über reduktive Radikaladditionen. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505231] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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