1
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Xu Y, Zhang R, Zhou B, Dong G. Iridium-Catalyzed Oxidant-Free Transfer Dehydrogenation of Carboxylic Acids. J Am Chem Soc 2024; 146:22899-22905. [PMID: 39113204 DOI: 10.1021/jacs.4c07115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2024]
Abstract
Direct dehydrogenation of carboxylic acids to their unsaturated counterparts represents a valuable transformation for complex molecule synthesis, which, however, has been challenging to achieve. In addition, the current carbonyl desaturation methods are almost all based on oxidative conditions. Here we report an Ir-catalyzed redox-neutral transfer dehydrogenation approach to directly convert carboxylic acids to either α,β- or β,γ-unsaturated counterparts. These reactions avoid using oxidants or strong bases, thus, tolerating various functional groups. The combined experimental and computational mechanistic studies suggest that this transfer hydrogenation reaction involves directed C-H oxidative addition, β-H elimination, and dihydride transfer to an alkene acceptor with C(sp3)-H reductive elimination as the turnover-limiting step.
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Affiliation(s)
- Yin Xu
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Rui Zhang
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Bo Zhou
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
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2
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Peng G, Ullah N, Streiff S, De Oliveira Vigier K, Pera-Titus M, Wischert R, Jérôme F. Metal-Free Selective Synthesis of α,β-Unsaturated Aldehydes from Alkenes and Formaldehyde Catalyzed by Dimethylamine. Chemistry 2024; 30:e202400601. [PMID: 38489225 DOI: 10.1002/chem.202400601] [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: 02/14/2024] [Revised: 03/12/2024] [Accepted: 03/14/2024] [Indexed: 03/17/2024]
Abstract
α,β-Unsaturated aldehydes are important building blocks for the synthesis of a wide range of chemicals, including polymers. The synthesis of these molecules from cheap feedstocks such as alkenes remains a scientific challenge, mainly due to the low reactivity of alkenes. Here we report a selective and metal-free access to α,β-unsaturated aldehydes from alkenes with formaldehyde. This reaction is catalyzed by dimethylamine and affords α,β-unsaturated aldehydes in yields of up to 80 %. By combining Density Functional Theory (DFT) calculations and experiments, we elucidate the reaction mechanism which is based on a cascade of hydride transfer, hydrolysis and aldolization reactions. The reaction can be performed under very mild conditions (30-50 °C), in a theoretically 100 % carbon-economical fashion, with water as the only by-product. The reaction was successfully applied to non-activated linear 1-alkenes, thus opening an access to industrially relevant α,β-unsaturated aldehydes from cheap and widely abundant chemicals at large scale.
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Affiliation(s)
- Gongming Peng
- Eco-Efficient Products and Process Laboratory, Syensqo/CNRS 3966 Jin Du Rd., Xin Zhuang Industrial Zone, Shanghai, 201108, China
| | - Naseeb Ullah
- Institut de Chimie des Milieux et Matériaux de Poitiers, University of Poitiers-CNRS, 1 rue Marcel Doré, TSA, 41105, 86073, Poitiers, France
| | - Stéphane Streiff
- Eco-Efficient Products and Process Laboratory, Syensqo/CNRS 3966 Jin Du Rd., Xin Zhuang Industrial Zone, Shanghai, 201108, China
| | - Karine De Oliveira Vigier
- Institut de Chimie des Milieux et Matériaux de Poitiers, University of Poitiers-CNRS, 1 rue Marcel Doré, TSA, 41105, 86073, Poitiers, France
| | - Marc Pera-Titus
- Eco-Efficient Products and Process Laboratory, Syensqo/CNRS 3966 Jin Du Rd., Xin Zhuang Industrial Zone, Shanghai, 201108, China
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Raphael Wischert
- Eco-Efficient Products and Process Laboratory, Syensqo/CNRS 3966 Jin Du Rd., Xin Zhuang Industrial Zone, Shanghai, 201108, China
- Syensqo R&I Center Lyon, 85 Av. des Frères Perret, 69190, Saint-Fons, France
| | - François Jérôme
- Institut de Chimie des Milieux et Matériaux de Poitiers, University of Poitiers-CNRS, 1 rue Marcel Doré, TSA, 41105, 86073, Poitiers, France
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3
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Zhao C, Gao R, Ma W, Li M, Li Y, Zhang Q, Guan W, Fu J. A facile synthesis of α,β-unsaturated imines via palladium-catalyzed dehydrogenation. Nat Commun 2024; 15:4329. [PMID: 38773128 PMCID: PMC11109338 DOI: 10.1038/s41467-024-48737-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 05/13/2024] [Indexed: 05/23/2024] Open
Abstract
The dehydrogenation adjacent to an electron-withdrawing group provides an efficient access to α,β-unsaturated compounds that serving as versatile synthons in organic chemistry. However, the α,β-desaturation of aliphatic imines has hitherto proven to be challenging due to easy hydrolysis and preferential dimerization. Herein, by employing a pre-fluorination and palladium-catalyzed dehydrogenation reaction sequence, the abundant simple aliphatic amides are amendable to the rapid construction of complex molecular architectures to produce α,β-unsaturated imines. Mechanistic investigations reveal a Pd(0)/Pd(II) catalytic cycle involving oxidative H-F elimination of N-fluoroamide followed by a smooth α,β-desaturation of the in-situ generated aliphatic imine intermediate. This protocol exhibits excellent functional group tolerance, and even the carbonyl groups are compatible without any competing dehydrogenation, allowing for late-stage functionalization of complex bioactive molecules. The synthetic utility of this transformation has been further demonstrated by a diversity-oriented derivatization and a concise formal synthesis of (±)-alloyohimbane.
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Affiliation(s)
- Chunyang Zhao
- Department of Chemistry, Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis and Institute of Functional Material Chemistry, Northeast Normal University, Changchun, 130024, China
| | - Rongwan Gao
- Department of Chemistry, Institute of Functional Material Chemistry, Northeast Normal University, Changchun, 130024, China
| | - Wenxuan Ma
- Department of Chemistry, Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis and Institute of Functional Material Chemistry, Northeast Normal University, Changchun, 130024, China
| | - Miao Li
- Department of Chemistry, Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis and Institute of Functional Material Chemistry, Northeast Normal University, Changchun, 130024, China
| | - Yifei Li
- Department of Chemistry, Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis and Institute of Functional Material Chemistry, Northeast Normal University, Changchun, 130024, China
| | - Qian Zhang
- Department of Chemistry, Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis and Institute of Functional Material Chemistry, Northeast Normal University, Changchun, 130024, China
| | - Wei Guan
- Department of Chemistry, Institute of Functional Material Chemistry, Northeast Normal University, Changchun, 130024, China.
| | - Junkai Fu
- Department of Chemistry, Jilin Province Key Laboratory of Organic Functional Molecular Design and Synthesis and Institute of Functional Material Chemistry, Northeast Normal University, Changchun, 130024, China.
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4
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Bodnar AK, Szewczyk SM, Sun Y, Chen Y, Huang AX, Newhouse TR. Comprehensive Mechanistic Analysis of Palladium- and Nickel-Catalyzed α,β-Dehydrogenation of Carbonyls via Organozinc Intermediates. J Org Chem 2024; 89:3123-3132. [PMID: 38377547 PMCID: PMC11000628 DOI: 10.1021/acs.joc.3c02572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
Introducing degrees of unsaturation into small molecules is a central transformation in organic synthesis. A strategically useful category of this reaction type is the conversion of alkanes into alkenes for substrates with an adjacent electron-withdrawing group. An efficient strategy for this conversion has been deprotonation to form a stabilized organozinc intermediate that can be subjected to α,β-dehydrogenation through palladium or nickel catalysis. This general reactivity blueprint presents a window to uncover and understand the reactivity of Pd- and Ni-enolates. Within this context, it was determined that β-hydride elimination is slow and proceeds via concerted syn-elimination. One interesting finding is that β-hydride elimination can be preferred to a greater extent than C-C bond formation for Ni, more so than with Pd, which defies the generally assumed trends that β-hydride elimination is more facile with Pd than Ni. The discussion of these findings is informed by KIE experiments, DFT calculations, stoichiometric reactions, and rate studies. Additionally, this report details an in-depth analysis of a methodological manifold for practical dehydrogenation and should enable its application to challenges in organic synthesis.
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Affiliation(s)
- Alexandra K Bodnar
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Suzanne M Szewczyk
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Yang Sun
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Yifeng Chen
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Anson X Huang
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Timothy R Newhouse
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
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5
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Yoo HS, Shin JW, Jang YH, Yang YS, Son SH, Won HJ, Kim SL, Sim J, Kim NJ. Synthesis of 2,3-Benzotropones via Palladium(II)-Catalyzed Aerobic Dehydrogenation from 1-Benzosuberones and Sequential Diels-Alder Reaction to Yield Benzobicyclo[3.2.2]nonenones. J Org Chem 2024; 89:3102-3110. [PMID: 38364274 DOI: 10.1021/acs.joc.3c02558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2024]
Abstract
An approach to 2,3-benzotropone from 1-benzosuberone via palladium(II)-catalyzed aerobic dehydrogenation was developed. This method first provided a catalytic route to various 2,3-benzotropones from their corresponding 1-benzosuberones in good yields. In addition, the reaction could be applied to a one-pot Diels-Alder reaction with maleimide, providing a complex benzobicyclo[3.2.2]nonenone in ≤90% yield. Kinetic analysis supporting our proposed mechanism was also performed, underscoring the robustness of the developed synthetic pathway.
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Affiliation(s)
- Hyung-Seok Yoo
- Department of Pharmacy, College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Jeong-Won Shin
- Department of Biomedical and Pharmaceutical Sciences, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Yoon Hu Jang
- Department of Pharmacy, College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Yo-Sep Yang
- Department of Pharmacy, College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Seung Hwan Son
- Department of Pharmacy, College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Hyuck-Jae Won
- Department of Pharmacy, College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Soo Lim Kim
- Department of Biomedical and Pharmaceutical Sciences, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Jaehoon Sim
- Department of Pharmacy, College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Nam-Jung Kim
- Department of Pharmacy, College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
- Department of Biomedical and Pharmaceutical Sciences, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
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6
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Li K, Kelly HR, Franco A, Batista VS, Baráth E. Dehydrogenation and Transfer Hydrogenation of Alkenones to Phenols and Ketones on Carbon-Supported Noble Metals. ACS Catal 2024; 14:2883-2896. [PMID: 38449532 PMCID: PMC10913045 DOI: 10.1021/acscatal.3c04849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 01/13/2024] [Accepted: 01/24/2024] [Indexed: 03/08/2024]
Abstract
The catalytic dehydrogenation of substituted alkenones on noble metal catalysts supported on carbon (Pt/C, Pd/C, Rh/C, and Ru/C) was investigated in an organic phase under inert conditions. The dehydrogenation and semihydrogenation of the enone starting materials resulted in aromatic compounds (primary products), saturated cyclic ketones (secondary products), and cyclic alcohols (minor products). Pd/C exhibits the highest catalytic activity, followed by Pt/C and Rh/C. Aromatic compounds remain the primary products, even in the presence of hydrogen donors. Joint experimental and theoretical analyses showed that the four catalytic materials stabilize a common dienol intermediate on the metal surfaces, formed by keto-enol tautomerization. This intermediate subsequently forms aromatic products upon dehydrogenation. The binding orientation of the enone reactants on the catalytic surface is strongly metal-dependent, as the M-O bond distance changes substantially according to the metal. The longer M-O bonds (Pt: 2.84 Å > Pd: 2.23 Å > Rh: 2.17 Å > Ru: 2.07 Å) correlate with faster reaction rates and more favorable keto-enol tautomerization, as shorter distances correspond to a more stabilized starting material. Tautomerization is shown to occur via a stepwise surface-assisted pathway. Overall, each of the studied metals exhibits a distinct balance of enthalpy and entropy of activation (ΔH°‡, ΔS°‡), offering unique possibilities in the realm of enone dehydrogenation reactions that can be achieved by suitable selection of catalytic materials.
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Affiliation(s)
- Katja Li
- Department
of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstrasse 4, Garching bei München D-85748, Germany
| | - H. Ray Kelly
- Department
of Chemistry, Yale University, 225 Prospect Street, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Ana Franco
- Leibniz-Institut
für Katalyse (e.V. LIKAT), Albert Einstein Str. 29a, Rostock D-18059, Germany
| | - Victor S. Batista
- Department
of Chemistry, Yale University, 225 Prospect Street, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Eszter Baráth
- Department
of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstrasse 4, Garching bei München D-85748, Germany
- Leibniz-Institut
für Katalyse (e.V. LIKAT), Albert Einstein Str. 29a, Rostock D-18059, Germany
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7
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Yamaguchi K, Jin X, Yatabe T, Suzuki K. Development of Environmentally Friendly Dehydrogenative Oxidation Reactions Using Multifunctional Heterogeneous Catalysts. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20220181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kazuya Yamaguchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656
| | - Xiongjie Jin
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656
| | - Takafumi Yatabe
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656
| | - Kosuke Suzuki
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656
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8
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Lu H, Zhou C, Wang Z, Kato T, Liu Y, Maruoka K. Fe-Catalyzed Three-Component Coupling Reaction of α,β,γ,δ-Unsaturated Carbonyl Compounds and Conjugate Dienes with Alkylsilyl Peroxides and Nucleophiles. J Org Chem 2022; 87:8824-8834. [PMID: 35731735 DOI: 10.1021/acs.joc.2c00885] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An Fe(OTf)2-catalyzed three-component coupling reaction of α,β,γ,δ-unsaturated carbonyl compounds with alkylsilyl peroxides in the presence of certain heteronucleophiles (ROH and indole) is realized under mild reaction conditions. A variety of α,β,γ,δ-diene carbonyl substrates with different substituents were successfully employable via combination with several different alkylsilyl peroxides. This new approach is also applicable to the double functionalization of diene substrates.
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Affiliation(s)
- Hanbin Lu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Canhua Zhou
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhe Wang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Terumasa Kato
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.,Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou 510006, China.,Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo 606-8501, Kyoto, Japan
| | - Yan Liu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.,Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou 510006, China
| | - Keiji Maruoka
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.,Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou 510006, China.,Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo 606-8501, Kyoto, Japan
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9
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Kanchupalli V, Thorbole LA, Kalepu J, Joseph D, Arshad M, Katukojvala S. Rhodium-Catalyzed Enal Transfer with N-Methoxypyridazinium Salts. Org Lett 2022; 24:3850-3854. [PMID: 35587254 DOI: 10.1021/acs.orglett.2c01424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Herein, we report a simple method for functionalized enals involving enal-transfer reaction of water-soluble N-methoxypyridazinium salts. This open-flask reaction proceeds under mild aqueous basic conditions through [2,3]-sigmatropic rearrangement of propargyl/allyl sulfur-ylides derived from in situ-generated Rh-(E)-enalcarbene. Various synthetically challenging allene- and allyl-functionalized (E)-enals with a γ-C(sp3) quaternary center were obtained in good to high yields. InCl3-catalyzed cascade cyclization of allenyl-enal and aniline gave a valuable pyrrolo[1,2-a]quinoline motif.
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Affiliation(s)
- Vinaykumar Kanchupalli
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Laxman Anandrao Thorbole
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Jagadeesh Kalepu
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Desna Joseph
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Mohammad Arshad
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Sreenivas Katukojvala
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
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10
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Koike K, Ueno S. Palladium-catalyzed Dehydrogenative [3+3] Aromatization of Propyl Ketones and Allyl Carbonates. CHEM LETT 2022. [DOI: 10.1246/cl.220032] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kenta Koike
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
| | - Satoshi Ueno
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
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11
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Bioinspired desaturation of alcohols enabled by photoredox proton-coupled electron transfer and cobalt dual catalysis. Nat Commun 2022; 13:809. [PMID: 35145083 PMCID: PMC8831637 DOI: 10.1038/s41467-022-28441-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 01/20/2022] [Indexed: 12/19/2022] Open
Abstract
In the biosynthesis sterols an enzyme-catalyzed demethylation is achieved via a stepwise oxidative transformation of alcohols to olefins. The overall demethylation proceeds through two sequential monooxygenation reactions and a subsequent dehydroformylative saturation. To mimic the desaturation processes observed in nature, we have successfully integrated photoredox proton-coupled electron transfer (PCET) and cobaloxime chemistry for the acceptorless dehydrogenation of alcohols. The state-of-the-art remote and precise desaturation of ketones proceeds efficiently through the activation of cyclic alcohols using bond-dissociation free energy (BDFE) as thermodynamic driving force. The resulting transient alkoxyl radical allows C-C bond scission to generate the carbon-centered radical remote to the carbonyl moiety. This key intermediate is subsequently combined with cobaloxime photochemistry to furnish the alkene. Moreover, the mild protocol can be extended to desaturation of linear alcohols as well as aromatic hydrocarbons. Application to bioactive molecules and natural product derivatives is also presented. Dehydrogenative reactions can provide alkenes, which are among the most useful handles for synthetic organic chemists. Here the authors integrated photoredox proton-coupled electron transfer and cobaloxime chemistry for the acceptorless dehydrogenation of alkyl alcohols.
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12
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Li X, Cheng Z, Liu J, Zhang Z, Song S, Jiao N. Selective desaturation of amides: a direct approach to enamides. Chem Sci 2022; 13:9056-9061. [PMID: 36091215 PMCID: PMC9365091 DOI: 10.1039/d2sc02210a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 06/30/2022] [Indexed: 12/18/2022] Open
Abstract
C(sp3)–H bond desaturation has been an attractive strategy in organic synthesis. Enamides are important structural fragments in pharmaceuticals and versatile synthons in organic synthesis. However, the dehydrogenation of amides usually occurs on the acyl side benefitting from enolate chemistry like the desaturation of ketones and esters. Herein, we demonstrate an Fe-assisted regioselective oxidative desaturation of amides, which provides an efficient approach to enamides and β-halogenated enamides. A novel and regioselective N-α,β-desaturation and dehydrogenative N-β-halogenation of amides was developed. This chemistry with high selectivity and broad substrate scope provides an efficient approach to enamides from simple amides.![]()
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Affiliation(s)
- Xinwei Li
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing 100191, China
| | - Zengrui Cheng
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing 100191, China
| | - Jianzhong Liu
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing 100191, China
| | - Ziyao Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing 100191, China
| | - Song Song
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing 100191, China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing 100191, China
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai 200062, China
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13
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Shibatani A, Kataoka Y, Ura Y. Palladium‐Catalyzed Aerobic α,β‐Dehydrogenation of Carboxylic Acids. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100637] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Ayaka Shibatani
- Department of Chemistry, Biology, and Environmental Science Faculty of Science Nara Women's University Kitauoyanishi-machi, Nara 630-8506 Japan
| | - Yasutaka Kataoka
- Department of Chemistry, Biology, and Environmental Science Faculty of Science Nara Women's University Kitauoyanishi-machi, Nara 630-8506 Japan
| | - Yasuyuki Ura
- Department of Chemistry, Biology, and Environmental Science Faculty of Science Nara Women's University Kitauoyanishi-machi, Nara 630-8506 Japan
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14
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Muraoka T, Siti N, Ueno K. C-O and C-C bond cleavage of α,β-unsaturated esters with the assistance of a gallane(pyridyl)iron complex. Dalton Trans 2021; 50:15996-16002. [PMID: 34676860 DOI: 10.1039/d1dt03286k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Selective fragmentation of α,β-unsaturated esters into CC, CO, and OR fragments was investigated with the assistance of a gallane(pyridyl)iron complex Cp*(OC)Fe{(η1-HGaMes2)(η1-2-C5H4N)} (1, Cp*: η5-C5Me5, Mes: 2,4,6-Me3C6H2). The reaction of 1 with methyl acrylate in C7D8 afforded vinyliron complex Cp*(OC)2Fe(CHCH2) (2) and 4-membered Ga2O2 cyclic gallane [Mes2GaOMe]2 (3). The C-O and C-C bonds in t-butyl acrylate were cleaved by the reaction with complex 1, producing complex 2 and pyridine-coordinated gallane Mes2(t-BuO)Ga(pyridine) (4). The selective bond cleavage reactions proceeded by the reactions of 1 with methyl methacrylate and methyl 2-butenoate to afford Cp*(OC)2Fe(CR1CHR2) (R1 = Me, R2 = H (5), R1 = H, R2 = Me (6)) and 3. In contrast, compound 3 was formed in 11% NMR yield by the reaction of 1 with methyl 3-butenoate (β,γ-unsaturated ester), and complex mixtures of unidentified products were obtained by the reaction of 1 with methyl 4-pentenoate (γ,δ-unsaturated ester) and methyl propionate (saturated ester). The treatment of a cyclic ester, α-methylene-γ-butyrolactone, with 1 afforded a 4-membered Ga2O2 cyclic gallane dimer with Cp*(OC)2FeC(CH2)CH2CH2 substituents on the oxygen atoms, namely [Cp*(OC)2FeC(CH2)CH2CH2OGaMes2]2 (7). In addition, the bond cleavage reaction occurred by the reaction of 1 with allyl methyl ether to afford the (η3-allyl)iron complex Cp*(OC)Fe(η3-CH2CHCH2) (8) and 3. These results indicate that the existence of the -CC-C-OR fragment, regardless of the presence or absence of the CO group between the CC and OR fragments, is essential for the bond cleavage reaction.
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Affiliation(s)
- Takako Muraoka
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan.
| | - Nursaliha Siti
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan.
| | - Keiji Ueno
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan.
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15
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Xia Y, Jana K, Studer A. Remote Radical Desaturation of Unactivated C-H Bonds in Amides. Chemistry 2021; 27:16621-16625. [PMID: 34590351 PMCID: PMC9292639 DOI: 10.1002/chem.202103509] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Indexed: 12/20/2022]
Abstract
Desaturation of inert aliphatic C-H bonds in alkanes to form the corresponding alkenes is challenging. In this communication, a new and practical strategy for remote site-selective desaturation of amides via radical chemistry is reported. The readily installed N-allylsulfonylamide moiety serves as an N radical precursor. Intramolecular 1,5-hydrogen atom transfer from an inert C-H bond to the N-radical generates a translocated C-radical which is subsequently oxidized and deprotonated to give the corresponding alkene. The commercially available methanesulfonyl chloride is used as reagent and a Cu/Ag-couple as oxidant. The remote desaturation is realized on different types of unactivated sp3 -C-H bonds. The potential synthetic utility of this method is further demonstrated by the dehydrogenation of natural product derivatives and drugs.
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Affiliation(s)
- Yong Xia
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149, Münster, Germany.,School of Chemistry and Chemical Engineering, Chongqing University, No.55 University Town South Road, Shapingba District, Chongqing, 400044, P. R. China
| | - Kalipada Jana
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149, Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149, Münster, Germany
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16
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Nickel-catalyzed sustainable synthesis of N-heterocycles through dehydrogenative coupling of alcohols. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153326] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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17
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Arisha AHI. A density functional theory study on the mechanism of the allylpalladium-catalyzed dehydrogenation of aldehydes and cyclic ketones. PROGRESS IN REACTION KINETICS AND MECHANISM 2021. [DOI: 10.1177/14686783211020600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The results of density functional theory calculations at the APFD/SDD level are detailed herein in order to study the main steps in the α,β-dehydrogenation of aldehydes and cyclic ketones in the presence of an allylpalladium complex catalyst. The mechanism is believed to proceed via an allylpalladium enolate complex (A) in equilibrium with the carbon-bonded complex (B), followed by β-hydride elimination to yield the allylpalladium hydride coordinated to the α,β-unsaturated carbonyl (complex C). The optimized structures and detailed energy profiles of these intermediates and their corresponding transition states are presented herein. The results indicate that the intermediates and their transition states are more stable in THF solution than in the gas phase. In detail, the energy barriers for the two steps are found to be 25.22 and 11.13 kcal/mol, respectively, in THF, and 29.93 and 9.77 kcal/mol, respectively, in the gas phase.
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Affiliation(s)
- Anan Haj Ichia Arisha
- Department of Organic Chemistry, School of Chemistry, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
- Department of Education, Beit Berl College, Beit Berl, Israel
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18
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Muzart J. Progress in the synthesis of aldehydes from Pd-catalyzed Wacker-type reactions of terminal olefins. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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19
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Chen M, Dong G. Platinum-Catalyzed α,β-Desaturation of Cyclic Ketones through Direct Metal-Enolate Formation. Angew Chem Int Ed Engl 2021; 60:7956-7961. [PMID: 33460511 DOI: 10.1002/anie.202013628] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 12/11/2020] [Indexed: 12/14/2022]
Abstract
The development of a platinum-catalyzed desaturation of cyclic ketones to their conjugated α,β-unsaturated counterparts is reported in this full article. A unique diene-platinum complex was identified to be an efficient catalyst, which enables direct metal-enolate formation. The reaction operates under mild conditions without using strong bases or acids. Good to excellent yields can be achieved for diverse and complex scaffolds. A wide range of functional groups, including those sensitive to acids, bases/nucleophiles, or palladium species, are tolerated, which represents a distinct feature from other known desaturation methods. Mechanistically, this platinum catalysis exhibits a fast and reversible α-deprotonation followed by a rate-determining β-hydrogen elimination process, which is different from the prior Pd-catalyzed desaturation method. Promising preliminary enantioselective desaturation using a chiral-diene-platinum complex has also been obtained.
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Affiliation(s)
- Ming Chen
- Department of Chemistry, University of Chicago, Chicago, IL, 60637, USA
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, Chicago, IL, 60637, USA
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20
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Chen M, Dong G. Platinum‐Catalyzed α,β‐Desaturation of Cyclic Ketones through Direct Metal–Enolate Formation. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202013628] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ming Chen
- Department of Chemistry University of Chicago Chicago IL 60637 USA
| | - Guangbin Dong
- Department of Chemistry University of Chicago Chicago IL 60637 USA
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21
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Gnaim S, Takahira Y, Wilke HR, Yao Z, Li J, Delbrayelle D, Echeverria PG, Vantourout JC, Baran PS. Electrochemically driven desaturation of carbonyl compounds. Nat Chem 2021; 13:367-372. [PMID: 33758368 DOI: 10.1038/s41557-021-00640-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 01/15/2021] [Indexed: 01/28/2023]
Abstract
Electrochemical techniques have long been heralded for their innate sustainability as efficient methods to achieve redox reactions. Carbonyl desaturation, as a fundamental organic oxidation, is an oft-employed transformation to unlock adjacent reactivity through the formal removal of two hydrogen atoms. To date, the most reliable methods to achieve this seemingly trivial reaction rely on transition metals (Pd or Cu) or stoichiometric reagents based on I, Br, Se or S. Here we report an operationally simple pathway to access such structures from enol silanes and phosphates using electrons as the primary reagent. This electrochemically driven desaturation exhibits a broad scope across an array of carbonyl derivatives, is easily scalable (1-100 g) and can be predictably implemented into synthetic pathways using experimentally or computationally derived NMR shifts. Systematic comparisons to state-of-the-art techniques reveal that this method can uniquely desaturate a wide array of carbonyl groups. Mechanistic interrogation suggests a radical-based reaction pathway.
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Affiliation(s)
- Samer Gnaim
- Department of Chemistry, Scripps Research, La Jolla, CA, USA
| | - Yusuke Takahira
- Department of Chemistry, Scripps Research, La Jolla, CA, USA
| | - Henrik R Wilke
- Department of Chemistry, Scripps Research, La Jolla, CA, USA
| | - Zhen Yao
- Asymchem Life Science (Tianjin) Co., Ltd, Tianjin, P.R. China
| | - Jinjun Li
- Asymchem Life Science (Tianjin) Co., Ltd, Tianjin, P.R. China
| | | | | | | | - Phil S Baran
- Department of Chemistry, Scripps Research, La Jolla, CA, USA.
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22
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Abstract
The development of novel synthetic methods remains a cornerstone in simplifying complex molecule synthesis. Progress in the field of transition metal catalysis has enabled new mechanistic strategies to achieve difficult chemical transformations, increased the value of abundant chemical building blocks, and pushed the boundaries of creative and strategic route design to improve step economy in multistep synthesis. Methodologies to introduce an olefin into saturated molecules continue to be essential transformations because of the plethora of reactions available for alkene functionalization. Of particular importance are dehydrogenation reactions adjacent to electron-withdrawing groups such as carbonyls, which advantageously provide activated olefins that can be regioselectively manipulated. Palladium catalysis occupies a central role in the most widely adopted carbonyl dehydrogenation reactions, but limits to the scope of these protocols persist.In this Account, we describe our group's contributions to the area of transition-metal-catalyzed dehydrogenation using palladium catalysis and more sustainable and economical nickel catalysis. These metals are used in conjunction with allyl and aryl halides or pseudohalides that serve as oxidants to access a unique mechanistic approach for one-step α,β-dehydrogenation of various electron-withdrawing groups, including ketones, esters, nitriles, amides, carboxylic acids, and electron-deficient heteroarenes. The pivotal reaction parameters that can be modified to influence reaction efficiency are highlighted, including base and oxidant structure as well as ligand and salt additive effects. This discussion is expected to serve as a guide for troubleshooting challenging dehydrogenation reactions and provide insight for future reaction development in this area.In addition to enabling dehydrogenation reactions, our group's allyl-Pd and -Ni chemistry can be used for C-C and C-X bond-forming reactions, providing novel disconnections with practical applications for expediting multistep synthesis. These transformations include a telescoped process for ketone α,β-vicinal difunctionalization; an oxidative enone β-functionalization, including β-stannylation, β-silylation, and β-alkylation; and an oxidative cycloalkenylation between unstabilized ketone enolates and unactivated alkenes. These bond-forming methodologies broaden the range of transformations accessible from abundant ketone, enone, and alkene moieties. Both the dehydrogenation and C-C and C-X bond-forming methodologies have been implemented in our group's total synthesis campaigns to provide step-efficient synthetic routes toward diverse natural products.Through the lens of multistep synthesis, the utility and robustness of our dehydrogenation and dehydrogenative functionalization methodologies can be better appreciated, and we hope that this Account will inspire practitioners to apply our methodologies to their own synthetic challenges.
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Affiliation(s)
- David Huang
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Timothy R Newhouse
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
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23
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Zhao BY, Zhang XL, Guo RL, Wang MY, Gao YR, Wang YQ. Aerobic Oxidative Dehydrogenation of Ketones to 1,4-Enediones. Org Lett 2021; 23:1216-1221. [DOI: 10.1021/acs.orglett.0c04174] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Bao-Yin Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710069, P.R. China
| | - Xing-Long Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710069, P.R. China
| | - Rui-Li Guo
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710069, P.R. China
| | - Meng-Yue Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710069, P.R. China
| | - Ya-Ru Gao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710069, P.R. China
| | - Yong-Qiang Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710069, P.R. China
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24
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Gnaim S, Vantourout JC, Serpier F, Echeverria PG, Baran PS. Carbonyl Desaturation: Where Does Catalysis Stand? ACS Catal 2021. [DOI: 10.1021/acscatal.0c04712] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Samer Gnaim
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Julien C. Vantourout
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Fabien Serpier
- Minakem High Potent, 8 Rue Fond Jean Pâques, 1435 Mont-Saint-Guibert, Belgium
| | | | - Phil. S. Baran
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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25
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Activated charcoal supported copper nanoparticles: A readily available and inexpensive heterogeneous catalyst for the N-arylation of primary amides and lactams with aryl iodides. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131858] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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26
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Jiang NQ, Li HY, Cai ZJ, Ji SJ. The Mizoroki–Heck reaction initiated formal C(sp 3)–H arylation of carbonyl compounds. Org Chem Front 2021. [DOI: 10.1039/d1qo00769f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work described a Mizoroki–Heck reaction initiated formal C(sp3)–H arylation of α-methylcinnamaldehydes under phosphane-free conditions.
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Affiliation(s)
- Nan-Quan Jiang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Hai-Yan Li
- Analysis and Testing Center, Soochow University, Suzhou 215123, China
| | - Zhong-Jian Cai
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Shun-Jun Ji
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
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27
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Son SH, Cho YY, Yoo HS, Lee SJ, Kim YM, Jang HJ, Kim DH, Shin JW, Kim NJ. Divergent synthesis of flavones and flavanones from 2′-hydroxydihydrochalcones via palladium(ii)-catalyzed oxidative cyclization. RSC Adv 2021; 11:14000-14006. [PMID: 35423945 PMCID: PMC8697754 DOI: 10.1039/d1ra01672e] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 04/01/2021] [Indexed: 12/21/2022] Open
Abstract
Divergent and versatile synthetic routes to flavones and flavanones via efficient Pd(ii) catalysis are disclosed. These Pd(ii) catalyses expediently provide a variety of flavones and flavanones from 2′-hydroxydihydrochalcones as common intermediates, depending on oxidants and additives, via discriminate oxidative cyclization sequences involving dehydrogenation, respectively, in a highly atom-economic manner. Divergent and versatile synthetic routes to flavones and flavanones via efficient Pd(ii) catalysis are disclosed.![]()
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Affiliation(s)
- Seung Hwan Son
- College of Pharmacy
- Kyung Hee University
- Seoul 02447
- Republic of Korea
| | - Yang Yil Cho
- College of Pharmacy
- Kyung Hee University
- Seoul 02447
- Republic of Korea
| | - Hyung-Seok Yoo
- College of Pharmacy
- Kyung Hee University
- Seoul 02447
- Republic of Korea
| | - Soo Jin Lee
- College of Pharmacy
- Kyung Hee University
- Seoul 02447
- Republic of Korea
| | - Young Min Kim
- College of Pharmacy
- Kyung Hee University
- Seoul 02447
- Republic of Korea
| | - Hyu Jeong Jang
- College of Pharmacy
- Kyung Hee University
- Seoul 02447
- Republic of Korea
| | - Dong Hwan Kim
- College of Pharmacy
- Kyung Hee University
- Seoul 02447
- Republic of Korea
| | - Jeong-Won Shin
- Department of Life and Nanopharmaceutical Sciences
- Graduate School
- Kyung Hee University
- Seoul 02447
- Republic of Korea
| | - Nam-Jung Kim
- College of Pharmacy
- Kyung Hee University
- Seoul 02447
- Republic of Korea
- Department of Life and Nanopharmaceutical Sciences
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28
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Kunisu M, Yahiro J, Morimoto N, Nishina Y. Analyzing Dynamic Chemical States of Palladium Supported on Graphene Oxide by X-ray Absorption Fine Structure under Oxidative and Reductive Environments. CHEM LETT 2020. [DOI: 10.1246/cl.200529] [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)
- Masahiro Kunisu
- Toray Research Center, Inc., Surface Science Laboratories, 3-7 Sonoyama 3-chome, Otsu, Shiga 520-8567, Japan
| | - Jumpei Yahiro
- Toray Research Center, Inc., Surface Science Laboratories, 3-7 Sonoyama 3-chome, Otsu, Shiga 520-8567, Japan
| | - Naoki Morimoto
- Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Division of Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| | - Yuta Nishina
- Research Core for Interdisciplinary Sciences, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
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29
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Temkin ON. Oxidation of Olefins to Carbonyl Compounds: Modern View of the Classical Reaction. KINETICS AND CATALYSIS 2020. [DOI: 10.1134/s0023158420050122] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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30
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Mies T, Ma TK, Barrett AGM. Syntheses of polyfunctional aromatic compounds from non-aromatic precursors. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4931] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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31
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Chen H, Liu L, Huang T, Chen J, Chen T. Direct Dehydrogenation for the Synthesis of α,β‐Unsaturated Carbonyl Compounds. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000454] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Hong Chen
- Haikou Hospital affiliated to Xiangya School of MedicineCentral South University Haikou 570100 People's Republic of China
| | - Long Liu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island ResourcesHainan Provincial Key Lab of Fine ChemHainan University Haikou 570228 People's Republic of China
| | - Tianzeng Huang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island ResourcesHainan Provincial Key Lab of Fine ChemHainan University Haikou 570228 People's Republic of China
| | - Jing Chen
- Haikou Hospital affiliated to Xiangya School of MedicineCentral South University Haikou 570100 People's Republic of China
| | - Tieqiao Chen
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island ResourcesHainan Provincial Key Lab of Fine ChemHainan University Haikou 570228 People's Republic of China
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32
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Raciti E, Donzello MP, Viola E, Bassetti M, Pettiti I, Bellucci N, Rizzoli C, Ercolani C. Palladium(II) and Platinum(II) Mononuclear Complexes and Tendency to Undergo Dehydrogenation of the Multiple N-Donor Ligand Di-(2-pyridyl)dihydropyrazine. Inorg Chem 2020; 59:8893-8905. [PMID: 32515953 DOI: 10.1021/acs.inorgchem.0c00699] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The already known di(2-pyridyl)dihydropyrazine (dhdpp) was prepared and isolated also in the form of a bis-hydrated species, i.e., dhdpp·2H2O. As established by X-ray work, a small amount of single crystals of di(2-pyridyl)-pyrazine (dpp) was also obtained from the mother liquors, this testifying the possibility of a dehydrogenation process dhdpp → dpp in the absence of a catalyst. Using dhdpp as a ligand, mononuclear metal derivatives of formula [(dhdpp)MCl2]·xH2O (M = PdII, PtII) were obtained as stable-to-air solids, studied by X-ray powder, IR, UV-visible, and 1H NMR spectra, and proved to exhibit a N2MCl2 coordination site involving one pyridine and one pyrazine N atom ("py-pyz" coordination). An interesting relationship has been established in terms of the observed types of coordination with the analogs of di(2-pyridyl)-pyrazine (dpp) formulated as [(dpp)MCl2]·3H2O, proved also by 1H NMR spectra to exhibit the "py-pyz" mode of coordination. Attempts to isolate from the reaction of dhdpp with Pd(OAc)2 the corresponding mononuclear derivatives were shown to lead, as definitely supported by 1H NMR spectral data and crystallographic work, to the exclusive formation of the corresponding dpp complex [(dpp)Pd(OAc)2]·5H2O ("py-pyz" coordination site), this proving the tendency of dhdpp to generate dpp under different reaction conditions. The promoted conversion of dhdpp into dpp in the complex was examined by sequential NMR analysis and established to be determined by Pd(OAc)2 which plays the role of catalyst. The new salt-like species [(CH3)(dhdpp)PdI2](I)·7H2O, prepared starting from [(dhdpp)PdCl2] in its reaction with CH3I, allowed the separation from the mother liquors of small brown crystals identified on the basis of X-ray analysis as the already known complex of formula [(dpp)PdI2] ("py-py" coordination), this result once again outlining the tendency of dhdpp to be dehydrogenated to dpp.
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Affiliation(s)
- Edoardo Raciti
- Dipartimento di Chimica, Università di Roma Sapienza, P.le A. Moro 5, 00185 Roma, Italy
| | - Maria Pia Donzello
- Dipartimento di Chimica, Università di Roma Sapienza, P.le A. Moro 5, 00185 Roma, Italy
| | - Elisa Viola
- Dipartimento di Chimica, Università di Roma Sapienza, P.le A. Moro 5, 00185 Roma, Italy
| | - Mauro Bassetti
- Dipartimento di Chimica, Università di Roma Sapienza, P.le A. Moro 5, 00185 Roma, Italy.,CNR - Istituto per i Sistemi Biologici, Sede di Roma - Meccanismi di Reazione, P.le A. Moro 5, 00185 Roma, Italy
| | - Ida Pettiti
- Dipartimento di Chimica, Università di Roma Sapienza, P.le A. Moro 5, 00185 Roma, Italy
| | - Noemi Bellucci
- Dipartimento di Chimica, Università di Roma Sapienza, P.le A. Moro 5, 00185 Roma, Italy
| | - Corrado Rizzoli
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 17/A, I-43124 Parma, Italy
| | - Claudio Ercolani
- Dipartimento di Chimica, Università di Roma Sapienza, P.le A. Moro 5, 00185 Roma, Italy
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33
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Komori S, Yamaguchi Y, Murakami Y, Kataoka Y, Ura Y. Palladium/Copper‐catalyzed Oxidation of Aliphatic Terminal Alkenes to Aldehydes Assisted by
p
‐Benzoquinone. ChemCatChem 2020. [DOI: 10.1002/cctc.202000472] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Saki Komori
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science Nara Women's University Kitauoyanishi-machi Nara 630-8506 Japan
| | - Yoshiko Yamaguchi
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science Nara Women's University Kitauoyanishi-machi Nara 630-8506 Japan
| | - Yuka Murakami
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science Nara Women's University Kitauoyanishi-machi Nara 630-8506 Japan
| | - Yasutaka Kataoka
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science Nara Women's University Kitauoyanishi-machi Nara 630-8506 Japan
| | - Yasuyuki Ura
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science Nara Women's University Kitauoyanishi-machi Nara 630-8506 Japan
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34
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Guo T, Han L, Wang T, Lei L, Zhang J, Xu D. Copper-Catalyzed Three-Component Formal [3 + 1 + 2] Benzannulation for Carbazole and Indole Synthesis. J Org Chem 2020; 85:9117-9128. [DOI: 10.1021/acs.joc.0c01056] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Tenglong Guo
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
| | - Li Han
- Dalian University of Technology, Dalian 116024 China
| | - Tingpeng Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
| | - Lan Lei
- Dalian University of Technology, Dalian 116024 China
| | - Jian Zhang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
| | - Dezhu Xu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
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35
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Wang C, Naren NA, Zheng P, Dong G. Intramolecular β-Alkenylation of Cyclohexanones via Pd-Catalyzed Desaturation-Mediated C(sp 3)-H/Alkyne Coupling. J Am Chem Soc 2020; 142:8962-8971. [PMID: 32307996 DOI: 10.1021/jacs.0c02654] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Site-selective C-C bond formation through the direct coupling of C(sp3)-H bonds with unsaturated hydrocarbons represents an atom-economical and redox-neutral way to functionalize chemically inert positions, such as those β to a carbonyl group. While most existing β-functionalization methods utilize a directing group (DG) strategy, here we report a Pd-catalyzed intramolecular β-alkenylation of ketones using alkynes as the coupling partner without the aid of DGs. Mediated by a ketone desaturation process, the reaction is redox-neutral and avoids using strong acids or bases. The resulting cis-5,6-fused bicycles can be diversely derivatized with excellent selectivity. Mechanistic studies imply an unusual "hydride-transfer" chain-like pathway, which involves the cyclometalation of an enyne intermediate and protonation of the resulting Pd enolate followed by an intermolecular hydride transfer through the desaturation of another substrate.
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Affiliation(s)
- Chengpeng Wang
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Nevin A Naren
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Pengfei Zheng
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States.,College of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
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36
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Wang C, Dong G. Catalytic β-Functionalization of Carbonyl Compounds Enabled by α,β-Desaturation. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01519] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Chengpeng Wang
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
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37
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Takei D, Yatabe T, Jin X, Yabe T, Mizuno N, Yamaguchi K. CeO2-Supported Pd(II)-on-Au Nanoparticle Catalyst for Aerobic Selective α,β-Desaturation of Carbonyl Compounds Applicable to Cyclohexanones. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00277] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Daisuke Takei
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Takafumi Yatabe
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Xiongjie Jin
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Tomohiro Yabe
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Noritaka Mizuno
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kazuya Yamaguchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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38
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Hu H, Gilliam AM, Qu F, Shaughnessy KH. Enolizable Ketones as Activators of Palladium(II) Precatalysts in Amine Arylation Reactions. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00221] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Huaiyuan Hu
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Ashley M. Gilliam
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Fengrui Qu
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Kevin H. Shaughnessy
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
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39
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Le Bras J, Muzart J. Pd-catalyzed reactions of cyclopropanols, cyclobutanols and cyclobutenols. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130879] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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40
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Abstract
This review recounts the development by the authors of the Pd-catalyzed procedures devoted to various kinds of oxidation. Starting with reactions assisted with UV light, the research has explored reactions under light-free conditions: allylic oxidation, alcohol oxidation, etherification, Wacker oxidation and dehydrogenations with, always, accompanying efforts towards mechanism determination.
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41
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Anzaldo B, Sharma P, Gutiérrez Pérez R, Villamizar C CP, Barquera-Lozada JE, Toscano A, Gaviño R, Portillo O. Ruthenocenyl phosphinated chalcones and their Pt(II) and Pd(II) complexes: Usual bidentate [PO] and unusual tridentate [PCO] coordination. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.119074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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42
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Chen M, Dong G. Copper-Catalyzed Desaturation of Lactones, Lactams, and Ketones under pH-Neutral Conditions. J Am Chem Soc 2019; 141:14889-14897. [DOI: 10.1021/jacs.9b07932] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Ming Chen
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
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43
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Hu R, Chen FJ, Zhang X, Zhang M, Su W. Copper-catalyzed dehydrogenative γ-C(sp 3)-H amination of saturated ketones for synthesis of polysubstituted anilines. Nat Commun 2019; 10:3681. [PMID: 31417081 PMCID: PMC6695438 DOI: 10.1038/s41467-019-11624-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 07/24/2019] [Indexed: 11/09/2022] Open
Abstract
Metal-catalyzed β-C-H functionalization of saturated carbonyls via dehydrogenative desaturation proved to be a powerful tool for simplifying synthesis of valuable β-substituted carbonyls. Here, we report a copper-catalyzed dehydrogenative γ-C(sp3)-H amination of saturated ketones that initiates the three-component coupling of saturated ketones, amines and N-substituted maleimides to construct polysubstituted anilines. The protocol presented herein enables both linear and α-branched butanones to couple a wide spectrum of amines and various N-substituted maleimides to produce diverse tetra- or penta-substituted anilines in fair-to-excellent yields with good functional group tolerance. The mechanism studies support that this ketone dehydrogenative γ-C(sp3)-H amination was triggered by the ketone α,β-dehydrogenation desaturation that activates the adjacent γ-C(sp3)-H bond towards functionalization. This α,β-dehydrogenation desaturation-triggered cascade sequence opens up a new avenue to the remote C(sp3)-H functionalization of saturated ketones and has the potential to enable the rapid syntheses of complex compounds from simple starting materials.
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Affiliation(s)
- Rong Hu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
| | - Fa-Jie Chen
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
| | - Xiaofeng Zhang
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
| | - Min Zhang
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
| | - Weiping Su
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China.
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44
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Yoo HS, Son SH, Cho YY, Lee SJ, Jang HJ, Kim YM, Kim DH, Kim NY, Park BY, Lee YS, Kim NJ. Synthesis of Flavanones via Palladium(II)-Catalyzed One-Pot β-Arylation of Chromanones with Arylboronic Acids. J Org Chem 2019; 84:10012-10023. [DOI: 10.1021/acs.joc.9b01162] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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45
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Wang T, Chen G, Lu Y, Chen Q, Huo Y, Li X. Intermolecular Multiple Dehydrogenative Cross‐Couplings of Ketones with Boronic Acids and Amines via Copper Catalysis. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900419] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tianzhang Wang
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 People's Republic of China
| | - Guowei Chen
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 People's Republic of China
| | - Yu‐Jing Lu
- School of Biomedical and Pharmaceutical SciencesGuangdong University of Technology Guangzhou 510006 People's Republic of China
| | - Qian Chen
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 People's Republic of China
| | - Yanping Huo
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 People's Republic of China
| | - Xianwei Li
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 People's Republic of China
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46
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Lei Z, Banerjee A, Kusevska E, Rizzo E, Liu P, Ngai M. β‐Selective Aroylation of Activated Alkenes by Photoredox Catalysis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901874] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Zhen Lei
- Department of Chemistry and Institute of Chemical Biology and Drug DiscoveryThe State University of New York at Stony Brook Stony Brook NY 11794 USA
| | - Arghya Banerjee
- Department of Chemistry and Institute of Chemical Biology and Drug DiscoveryThe State University of New York at Stony Brook Stony Brook NY 11794 USA
| | - Elena Kusevska
- Department of ChemistryUniversity of Pittsburgh Pittsburgh PA 15260 USA
| | - Eric Rizzo
- Department of Chemistry and Institute of Chemical Biology and Drug DiscoveryThe State University of New York at Stony Brook Stony Brook NY 11794 USA
| | - Peng Liu
- Department of ChemistryUniversity of Pittsburgh Pittsburgh PA 15260 USA
| | - Ming‐Yu Ngai
- Department of Chemistry and Institute of Chemical Biology and Drug DiscoveryThe State University of New York at Stony Brook Stony Brook NY 11794 USA
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47
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Lei Z, Banerjee A, Kusevska E, Rizzo E, Liu P, Ngai MY. β-Selective Aroylation of Activated Alkenes by Photoredox Catalysis. Angew Chem Int Ed Engl 2019; 58:7318-7323. [PMID: 30994977 PMCID: PMC6527503 DOI: 10.1002/anie.201901874] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 03/18/2019] [Indexed: 01/24/2023]
Abstract
Late-stage synthesis of α,β-unsaturated aryl ketones remains an unmet challenge in organic synthesis. Reported herein is a photocatalytic non-chain-radical aroyl chlorination of alkenes by a 1,3-chlorine atom shift to form β-chloroketones as masked enones that liberate the desired enones upon workup. This strategy suppresses side reactions of the enone products. The reaction tolerates a wide array of functional groups and complex molecules including derivatives of peptides, sugars, natural products, nucleosides, and marketed drugs. Notably, addition of 2,6-di-tert-butyl-4-methyl-pyridine enhances the quantum yield and efficiency of the cross-coupling reaction. Experimental and computational studies suggest a mechanism involving PCET, formation and reaction of an α-chloro-α-hydroxy benzyl radical, and 1,3-chlorine atom shift.
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Affiliation(s)
- Zhen Lei
- Department of Chemistry and Institute of Chemical Biology and Drug Discovery, The State University of New York at Stony Brook, Stony Brook, NY, 11794, USA
| | - Arghya Banerjee
- Department of Chemistry and Institute of Chemical Biology and Drug Discovery, The State University of New York at Stony Brook, Stony Brook, NY, 11794, USA
| | - Elena Kusevska
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Eric Rizzo
- Department of Chemistry and Institute of Chemical Biology and Drug Discovery, The State University of New York at Stony Brook, Stony Brook, NY, 11794, USA
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Ming-Yu Ngai
- Department of Chemistry and Institute of Chemical Biology and Drug Discovery, The State University of New York at Stony Brook, Stony Brook, NY, 11794, USA
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48
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Huang D, Szewczyk SM, Zhang P, Newhouse TR. Allyl-Nickel Catalysis Enables Carbonyl Dehydrogenation and Oxidative Cycloalkenylation of Ketones. J Am Chem Soc 2019; 141:5669-5674. [PMID: 30861346 PMCID: PMC7495923 DOI: 10.1021/jacs.9b02552] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We herein disclose the first report of a first-row transition metal-catalyzed α,β-dehydrogenation of carbonyl compounds using allyl-nickel catalysis. This development overcomes several limitations of previously reported allyl-palladium-catalyzed oxidation, and is further leveraged for the development of an oxidative cycloalkenylation reaction that provides access to bicycloalkenones with fused, bridged, and spirocyclic ring systems using unactivated ketone and alkene precursors.
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Affiliation(s)
- David Huang
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Suzanne M. Szewczyk
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Pengpeng Zhang
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Timothy R. Newhouse
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
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49
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Hirao T. Synthetic Strategy: Palladium-Catalyzed Dehydrogenation of Carbonyl Compounds. J Org Chem 2019; 84:1687-1692. [PMID: 30668104 DOI: 10.1021/acs.joc.8b03117] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Palladium-catalyzed oxidative α,β-dehydrogenation (oxidative desilylation, decarboxylative dehydrogenation, direct dehydrogenation, and oxidative dehydroboration) of carbonyl compounds and their derivatives to α,β-unsaturated carbonyl compounds via palladium enolate intermediates is reviewed as a versatile synthetic method.
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Affiliation(s)
- Toshikazu Hirao
- The Institute of Scientific and Industrial Research , Osaka University , Mihoga-oka, Ibaraki , Osaka 567-0047 , Japan
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50
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Teskey CJ, Adler P, Gonçalves CR, Maulide N. Chemoselective α,β-Dehydrogenation of Saturated Amides. Angew Chem Int Ed Engl 2019; 58:447-451. [PMID: 30332524 PMCID: PMC6348382 DOI: 10.1002/anie.201808794] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 10/10/2018] [Indexed: 01/12/2023]
Abstract
We report a method for the selective α,β-dehydrogenation of amides in the presence of other carbonyl moieties under mild conditions. Our strategy relies on electrophilic activation coupled to in situ selective selenium-mediated dehydrogenation. The α,β-unsaturated products were obtained in moderate to excellent yields, and their synthetic versatility was demonstrated by a range of transformations. Mechanistic experiments suggest formation of an electrophilic SeIV species.
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Affiliation(s)
- Christopher J. Teskey
- University of ViennaInstitute of Organic ChemistryWähringer Strasse 381090ViennaAustria
| | - Pauline Adler
- University of ViennaInstitute of Organic ChemistryWähringer Strasse 381090ViennaAustria
| | - Carlos R. Gonçalves
- University of ViennaInstitute of Organic ChemistryWähringer Strasse 381090ViennaAustria
| | - Nuno Maulide
- University of ViennaInstitute of Organic ChemistryWähringer Strasse 381090ViennaAustria
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