1
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Minami Y, Hiyama T. Cross-coupling Reaction based on the Transformation of Trialkylsilyl Groups. J SYN ORG CHEM JPN 2021. [DOI: 10.5059/yukigoseikyokaishi.79.642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yasunori Minami
- Department of Materials and Chemistry, National Institute of Advanced Industrial Science and Technology (AIST)
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2
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Long J, Le L, Iwasaki T, Qiu R, Kambe N. Copper-Catalyzed Amination of C(sp 3)-H bonds: From Anilides to Indolines. J Org Chem 2020; 85:482-492. [PMID: 31769677 DOI: 10.1021/acs.joc.9b02404] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Copper-catalyzed oxidative intramolecular cyclization of o-alkylated anilines via cleavage of C(sp3)-H and N-H bonds for the production of indolines is described. This approach provides a straightforward strategy for the synthesis of nitrogen-containing heterocyclic compounds through the functionalization of unactivated C(sp3)-H bonds with high site selectivity. The present catalytic system shows high preference for functionalization of unactivated C(sp3)-H bonds over C(sp2)-H bonds, leading to C-N bond formation.
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Affiliation(s)
- Jinguo Long
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering , Hunan University , Changsha 410082 , P.R. China
| | - Liyuan Le
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering , Hunan University , Changsha 410082 , P.R. China
| | - Takanori Iwasaki
- Department of Applied Chemistry, Graduate School of Engineering , Osaka University , Suita, Osaka 565-0871 , Japan.,Department of Chemistry and Biotechnology, Graduate School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyoku, Tokyo 113-8656 , Japan
| | - Renhua Qiu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering , Hunan University , Changsha 410082 , P.R. China.,Department of Applied Chemistry, Graduate School of Engineering , Osaka University , Suita, Osaka 565-0871 , Japan
| | - Nobuaki Kambe
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering , Hunan University , Changsha 410082 , P.R. China.,Department of Applied Chemistry, Graduate School of Engineering , Osaka University , Suita, Osaka 565-0871 , Japan
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3
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Yang S, Zhu S, Lu D, Gong Y. Polarity-Reversed Addition of Enol Ethers to Imines under Visible Light: Redox-Neutral Access to Azide-Containing Amino Acids. Org Lett 2019; 21:8464-8468. [DOI: 10.1021/acs.orglett.9b03238] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sen Yang
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China
| | - Shuangyu Zhu
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China
| | - Dengfu Lu
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China
| | - Yuefa Gong
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China
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4
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Abstract
Nitrones are important compounds and are highly useful in many aspects. The first part describes the methods for synthesis of nitrones, which are useful and environmentally friendly. Catalytic oxidations, condensations, and other useful reactions are described. The nitrones thus obtained are key intermediates for the synthesis of biologically important nitrogen compounds. The second part describes the fundamental transformations of nitrones, which will provide the strategies and means for the construction of nitrogen compounds. The reactions with nucleophiles or radicals, C-H functionalization, and various addition reactions are described. The last reactions are particularly important for highly selective carbon-carbon bond formations. 1,3-Dipolar cycloaddition reactions are excluded because the size of the review is limited and excellent reviews have been published in Chemical Reviews.
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Affiliation(s)
- Shun-Ichi Murahashi
- Department of Chemistry, Graduate School of Engineering Science , Osaka University , 1-3, Machikaneyama , Toyonaka , Osaka 560-8531 , Japan
| | - Yasushi Imada
- Department of Applied Chemistry , Tokushima University , 2-1, Minamijosanjima , Tokushima 770-8506 , Japan
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5
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Oisaki K. Development of Highly Chemoselective Oxidative Transformations by Designing Organoradicals. Chem Pharm Bull (Tokyo) 2018; 66:907-919. [PMID: 30270237 DOI: 10.1248/cpb.c18-00501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To conduct organic synthesis in the field of pharmaceutical science, methodologies that can easily and quickly supply compounds with high drug-likeness are highly desirable. Based on the original catalyst design concept "Radical-Conjugated Redox Catalysis (RCRC)" established during my research, various C(sp3)-H functionalizations and protein modifications have been developed, taking advantage of the high reactivity and chemoselectivity of the single-electron transfer process. This review focuses on the eight-year research efforts by my collaborators and me, from conception to results.
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Affiliation(s)
- Kounosuke Oisaki
- Graduate School of Pharmaceutical Sciences, The University of Tokyo
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6
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Zeng H, Lu D, Gong Y. Direct Metal-Free C-H Functionalization of Cyclic Ethers with Schiff Bases Through an Azobisisobutyronitrile-Initiated Radical Chain Process. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701288] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Haipeng Zeng
- School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; 1037 Luoyu Rd. 430074 Wuhan Hubei China
| | - Dengfu Lu
- School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; 1037 Luoyu Rd. 430074 Wuhan Hubei China
| | - Yuefa Gong
- School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; 1037 Luoyu Rd. 430074 Wuhan Hubei China
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7
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Huang W, Xu N. Synthesis of pinacol acetals catalyzed by (2-carboxyphenyl)diphenylphosphonium bromide. SYNTHETIC COMMUN 2017. [DOI: 10.1080/00397911.2017.1368082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Wenhua Huang
- Department of Chemistry, Tianjin University, Tianjin, P. R. China
| | - Ning Xu
- Department of Chemistry, Tianjin University, Tianjin, P. R. China
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8
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Maaliki C, Thiery E, Thibonnet J. Emergence of Copper-Mediated Formation of C-C Bonds. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600540] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Carine Maaliki
- Université François-Rabelais; ISP-UMR 1282; UFR Sciences et Techniques; Parc Grandmont 37000 Tours France
| | - Emilie Thiery
- Université François-Rabelais; ISP-UMR 1282; UFR Sciences et Techniques; Parc Grandmont 37000 Tours France
| | - Jérôme Thibonnet
- Université François-Rabelais; ISP-UMR 1282; UFR Sciences et Techniques; Parc Grandmont 37000 Tours France
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9
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Yang S, Liao D, Tian X, Lei X. Access to the 2H-Tetrahydro-4,6-dioxo-1,2-oxazine Ring System from Nitrone via a Tandem Nucleophilic Addition and Transesterification Reaction. Org Lett 2016; 18:376-9. [DOI: 10.1021/acs.orglett.5b03374] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Shaoqiang Yang
- School
of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Daohong Liao
- School
of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Xiaoqi Tian
- School
of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Xiaoguang Lei
- School
of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
- Beijing
National Laboratory of Molecular Sciences, Key Laboratory of Bioorganic
Chemistry and Molecular Engineering of Ministry of Education, Department
of Chemical Biology, College of Chemistry and Molecular Engineering,
Synthetic and Functional Biolmolecules Center, and Center for Life
Sciences, Peking University, Beijing 100871, China
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10
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Liu C, Yuan J, Gao M, Tang S, Li W, Shi R, Lei A. Oxidative Coupling between Two Hydrocarbons: An Update of Recent C–H Functionalizations. Chem Rev 2015; 115:12138-204. [DOI: 10.1021/cr500431s] [Citation(s) in RCA: 836] [Impact Index Per Article: 92.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Chao Liu
- College
of Chemistry and Molecular Sciences, Institute for Advanced Studies
(IAS), Wuhan University, Wuhan 430072, People’s Republic of China
| | - Jiwen Yuan
- College
of Chemistry and Molecular Sciences, Institute for Advanced Studies
(IAS), Wuhan University, Wuhan 430072, People’s Republic of China
| | - Meng Gao
- National
Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang, Jiangxi 330022, People’s Republic of China
| | - Shan Tang
- College
of Chemistry and Molecular Sciences, Institute for Advanced Studies
(IAS), Wuhan University, Wuhan 430072, People’s Republic of China
| | - Wu Li
- College
of Chemistry and Molecular Sciences, Institute for Advanced Studies
(IAS), Wuhan University, Wuhan 430072, People’s Republic of China
| | - Renyi Shi
- College
of Chemistry and Molecular Sciences, Institute for Advanced Studies
(IAS), Wuhan University, Wuhan 430072, People’s Republic of China
| | - Aiwen Lei
- College
of Chemistry and Molecular Sciences, Institute for Advanced Studies
(IAS), Wuhan University, Wuhan 430072, People’s Republic of China
- National
Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang, Jiangxi 330022, People’s Republic of China
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11
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Affiliation(s)
- Ken-ichi Yamada
- Graduate School of Pharmaceutical Sciences; Kyoto University; Kyoto Japan
| | - Kiyoshi Tomioka
- Department of Medicinal Chemistry; Faculty of Pharmaceutical Sciences; Doshisha Women's College of Liberal Arts; Kyoto Japan
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12
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Jin J, MacMillan DWC. Direct α-arylation of ethers through the combination of photoredox-mediated C-H functionalization and the Minisci reaction. Angew Chem Int Ed Engl 2015; 54:1565-9. [PMID: 25470570 PMCID: PMC4311771 DOI: 10.1002/anie.201410432] [Citation(s) in RCA: 325] [Impact Index Per Article: 36.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Indexed: 11/07/2022]
Abstract
The direct α-arylation of cyclic and acyclic ethers with heteroarenes has been accomplished through the design of a photoredox-mediated CH functionalization pathway. Transiently generated α-oxyalkyl radicals, produced from a variety of widely available ethers through hydrogen atom transfer (HAT), were coupled with a range of electron-deficient heteroarenes in a Minisci-type mechanism. This mild, visible-light-driven protocol allows direct access to medicinal pharmacophores of broad utility using feedstock substrates and a commercial photocatalyst.
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Affiliation(s)
- Jian Jin
- Merck Center for Catalysis at Princeton University, Washington Road, Princeton, New Jersey 08544, United States, Homepage: http://www.princeton.edu/chemistry/macmillan/
| | - David W. C. MacMillan
- Merck Center for Catalysis at Princeton University, Washington Road, Princeton, New Jersey 08544, United States, Homepage: http://www.princeton.edu/chemistry/macmillan/
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13
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Jin J, MacMillan DWC. Direct α-Arylation of Ethers through the Combination of Photoredox-Mediated CH Functionalization and the Minisci Reaction. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201410432] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Chemoselective aerobic oxidation catalyzed by a metal/stable organoradical redox conjugate. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.05.085] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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15
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Ravelli D, Zoccolillo M, Mella M, Fagnoni M. Photocatalytic Synthesis of Oxetane Derivatives by Selective CH Activation. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400027] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Girard SA, Knauber T, Li CJ. Dehydrierende Kreuzkupplungen von C sp 3-H-Bindungen: vielseitige Verfahren zur Bildung von C-C-Bindungen. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304268] [Citation(s) in RCA: 394] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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17
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Girard SA, Knauber T, Li CJ. The cross-dehydrogenative coupling of C(sp3)-H bonds: a versatile strategy for C-C bond formations. Angew Chem Int Ed Engl 2013; 53:74-100. [PMID: 24214829 DOI: 10.1002/anie.201304268] [Citation(s) in RCA: 1536] [Impact Index Per Article: 139.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 07/23/2013] [Indexed: 11/09/2022]
Abstract
Over the last decade, substantial research has led to the introduction of an impressive number of efficient procedures which allow the selective construction of CC bonds by directly connecting two different CH bonds under oxidative conditions. Common to these methodologies is the generation of the reactive intermediates in situ by activation of both CH bonds. This strategy was introduced by the group of Li as cross-dehydrogenative coupling (CDC) and discloses waste-minimized synthetic alternatives to classic coupling procedures which rely on the use of prefunctionalized starting materials. This Review highlights the recent progress in the field of cross-dehydrogenative C sp 3C formations and provides a comprehensive overview on existing procedures and employed methodologies.
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Affiliation(s)
- Simon A Girard
- Department of Chemistry and FQRNT Center for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. W., Montréal, Quebec H3A 0B8 (Canada) http://cjli.mcgill.ca
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18
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Kaneko K, Yoshino T, Matsunaga S, Kanai M. Sultam Synthesis via Cu-Catalyzed Intermolecular Carboamination of Alkenes with N-Fluorobenzenesulfonimide. Org Lett 2013; 15:2502-5. [DOI: 10.1021/ol4009848] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Keiichi Kaneko
- Graduate School of Pharmaceutical Sciences, the University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan, and ACT-C, Japan Science and Technology Agency (JST), Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tatsuhiko Yoshino
- Graduate School of Pharmaceutical Sciences, the University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan, and ACT-C, Japan Science and Technology Agency (JST), Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shigeki Matsunaga
- Graduate School of Pharmaceutical Sciences, the University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan, and ACT-C, Japan Science and Technology Agency (JST), Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Motomu Kanai
- Graduate School of Pharmaceutical Sciences, the University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan, and ACT-C, Japan Science and Technology Agency (JST), Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
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19
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Takasu N, Oisaki K, Kanai M. Iron-Catalyzed Oxidative C(3)–H Functionalization of Amines. Org Lett 2013; 15:1918-21. [DOI: 10.1021/ol400568u] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Noriaki Takasu
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and ERATO, Japan Science and Technology Agency (JST), Kanai Life Science Catalysis Project, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kounosuke Oisaki
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and ERATO, Japan Science and Technology Agency (JST), Kanai Life Science Catalysis Project, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Motomu Kanai
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and ERATO, Japan Science and Technology Agency (JST), Kanai Life Science Catalysis Project, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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20
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Kanai M, Matsunaga S, Oisaki K, Shimizu Y. From Chiral Base Catalysts to Redox-Active Catalysts: Chasing the Identity of Metal Catalysts in Carbon-Carbon Bond-Forming Reactions. J SYN ORG CHEM JPN 2013. [DOI: 10.5059/yukigoseikyokaishi.71.433] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Majji G, Guin S, Gogoi A, Rout SK, Patel BK. Easy access to benzylic esters directly from alkyl benzenes under metal-free conditions. Chem Commun (Camb) 2013; 49:3031-3. [DOI: 10.1039/c3cc40832a] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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22
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Zhang G, Ma Y, Wang S, Kong W, Wang R. Chiral organic contact ion pairs in metal-free catalytic enantioselective oxidative cross-dehydrogenative coupling of tertiary amines to ketones. Chem Sci 2013. [DOI: 10.1039/c3sc50604e] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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23
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Hashizume S, Oisaki K, Kanai M. Functional‐Group‐Tolerant Catalytic Migratory Oxidative Coupling of Nitrones. Chem Asian J 2012; 7:2600-6. [DOI: 10.1002/asia.201200359] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Shogo Hashizume
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo‐ku, Tokyo 113‐0033 (Japan), Fax: (+81) 3‐5841‐5206
- Kanai Life Science Catalysis Project, ERATO (Japan) Science and Technology Agency (JST), Hongo, Bunkyo‐ku, Tokyo 113‐0033 (Japan)
| | - Kounosuke Oisaki
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo‐ku, Tokyo 113‐0033 (Japan), Fax: (+81) 3‐5841‐5206
- Kanai Life Science Catalysis Project, ERATO (Japan) Science and Technology Agency (JST), Hongo, Bunkyo‐ku, Tokyo 113‐0033 (Japan)
| | - Motomu Kanai
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo‐ku, Tokyo 113‐0033 (Japan), Fax: (+81) 3‐5841‐5206
- Kanai Life Science Catalysis Project, ERATO (Japan) Science and Technology Agency (JST), Hongo, Bunkyo‐ku, Tokyo 113‐0033 (Japan)
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Zhang J, Tiwari B, Xing C, Chen X, Chi YR. Enantioselective Oxidative Cross-Dehydrogenative Coupling of Tertiary Amines to Aldehydes. Angew Chem Int Ed Engl 2012; 51:3649-52. [DOI: 10.1002/anie.201109054] [Citation(s) in RCA: 148] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 02/10/2011] [Indexed: 11/09/2022]
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25
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Enantioselective Oxidative Cross-Dehydrogenative Coupling of Tertiary Amines to Aldehydes. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201109054] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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26
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Sugiishi T, Nakamura H. Zinc(II)-catalyzed redox cross-dehydrogenative coupling of propargylic amines and terminal alkynes for synthesis of N-tethered 1,6-enynes. J Am Chem Soc 2012; 134:2504-7. [PMID: 22283631 DOI: 10.1021/ja211092q] [Citation(s) in RCA: 150] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The zinc(II)-catalyzed redox cross-dehydrogenative coupling (CDC) of propargylic amines and terminal alkynes proceeds to afford N-tethered 1,6-enynes. In the current CDC reaction, a C(sp)-C(sp(3)) bond is formed between the carbon adjacent to the nitrogen atom in the propargylic amine and the terminal carbon of the alkyne with reduction of the C-C triple bond of the propargylic amine, which acts as an internal oxidant.
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Affiliation(s)
- Tsuyuka Sugiishi
- Department of Chemistry, Faculty of Science, Gakushuin University, Mejiro, Toshima-ku, Tokyo 171-8588, Japan
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27
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Huang J, Li LT, Li HY, Husan E, Wang P, Wang B. Bu4NI-catalyzed benzylic acyloxylation of alkylarenes with aromatic aldehydes. Chem Commun (Camb) 2012; 48:10204-6. [DOI: 10.1039/c2cc35450k] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Li LT, Li HY, Xing LJ, Wen LJ, Wang P, Wang B. Potassium iodide catalyzed simultaneous C3-formylation and N-aminomethylation of indoles with 4-substituted-N,N-dimethylanilines. Org Biomol Chem 2012; 10:9519-22. [DOI: 10.1039/c2ob26636a] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Sonobe T, Oisaki K, Kanai M. Catalytic aerobic production of imines en route to mild, green, and concise derivatizations of amines. Chem Sci 2012. [DOI: 10.1039/c2sc20699d] [Citation(s) in RCA: 174] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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30
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Hashizume S, Oisaki K, Kanai M. Catalytic migratory oxidative coupling of nitrones through an outer-sphere C(sp3)-H activation process. CHEM REC 2011; 11:236-41. [PMID: 21898780 DOI: 10.1002/tcr.201100024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Indexed: 11/08/2022]
Abstract
Outer-sphere redox catalysis is key to efficient C-H activation, which has attracted increased interest in organic chemistry. In this account, we describe a Cu(I) -catalyzed oxidative coupling between nitrones and various ethers or amines as an example. Predictable site-selective C-C bond formation was achieved through activation of the C-H bonds in each coupling partner and the migration of a C-N double bond. Mechanistic studies strongly suggested that the reaction proceeded via an oxonium/iminium cation species as the key intermediate. The mechanistic information allows for future extension of outer-sphere redox catalysis.
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Affiliation(s)
- Shogo Hashizume
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1, Hongo, Tokyo 113-0033, Japan
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