1
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Chen W, Wen LQ, Lu XB, Zhou H. Iron-catalyzed selective construction of indole derivatives via oxidative C(sp 3)-H functionalization of indolin-2-ones. Org Biomol Chem 2024; 22:3073-3079. [PMID: 38563186 DOI: 10.1039/d4ob00133h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Considering the importance of developing powerful catalysts and the pharmacophore characteristics of indole derivatives, we describe a switchable approach for the iron-catalyzed oxidative C(sp3)-H functionalization of indolin-2-ones. Selective transformations displayed excellent activity and chemoselectivity using FeCl2 as the catalyst, air as the oxidant, and alcohol as the solvent. By manipulating the reaction conditions, particularly the choice of solvent, catalyst loading, and reaction sequence, a series of valuable indole derivatives, including isatins and symmetrical and nonsymmetrical isoindigos, were selectively synthesized in good to excellent yields. Furthermore, the gram-scale synthesis of compounds with biological anticancer activity under simple conditions highlights their great potential in practical applications.
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Affiliation(s)
- Wei Chen
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
| | - Lang-Qi Wen
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
| | - Xiao-Bing Lu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
| | - Hui Zhou
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
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2
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Sugawara M, Sawamura M, Akakabe M, Ramadoss B, Sohtome Y, Sodeoka M. Pd-catalyzed Aerobic Cross-Dehydrogenative Coupling of Catechols with 2-Oxindoles and Benzofuranones: Reactivity Difference Between Monomer and Dimer. Chem Asian J 2022; 17:e202200807. [PMID: 36062560 PMCID: PMC9825984 DOI: 10.1002/asia.202200807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/05/2022] [Indexed: 01/11/2023]
Abstract
Persistent radicals, which are generated from 2-oxindole or benzofuranone dimers, are useful tools for designing the radical-based cross-coupling reaction to provide molecules containing a quaternary carbon. The persistent radical is accessible from both the dimer and monomer; however, the reactivity difference between these substrates for the oxidative cross-coupling reaction is not fully understood, most likely because of the mechanistic complexity. Here, we present details of an aerobic cross-dehydrogenative coupling (CDC) reaction using various monomers and catechols. UV-Vis analysis and mechanistic control experiments showed that the monomer is less reactive than the dimer under aerobic conditions. Our Pd(II)-BINAP-μ-hydroxo complex significantly improved the reactivity of the monomers for the aerobic CDC reaction with catechols, yielding results comparable to those of the corresponding dimer. The procedure, which enables the generation of the persistent radical in situ, is particularly useful when employing the monomer that is not readily converted to the corresponding dimer.
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Affiliation(s)
- Masumi Sugawara
- Synthetic Organic Chemistry LaboratoryRIKEN Cluster for Pioneering Research2-1 HirosawaWakoSaitamaJapan
| | - Miki Sawamura
- Synthetic Organic Chemistry LaboratoryRIKEN Cluster for Pioneering Research2-1 HirosawaWakoSaitamaJapan,Tokyo Medical and Dental UniversityTokyo113-8510Japan
| | - Mai Akakabe
- Synthetic Organic Chemistry LaboratoryRIKEN Cluster for Pioneering Research2-1 HirosawaWakoSaitamaJapan,Catalysis and Integrated Research Group RIKEN Center for Sustainable Resource Science
| | - Boobalan Ramadoss
- Catalysis and Integrated Research Group RIKEN Center for Sustainable Resource Science
| | - Yoshihiro Sohtome
- Synthetic Organic Chemistry LaboratoryRIKEN Cluster for Pioneering Research2-1 HirosawaWakoSaitamaJapan,Catalysis and Integrated Research Group RIKEN Center for Sustainable Resource Science
| | - Mikiko Sodeoka
- Synthetic Organic Chemistry LaboratoryRIKEN Cluster for Pioneering Research2-1 HirosawaWakoSaitamaJapan,Catalysis and Integrated Research Group RIKEN Center for Sustainable Resource Science,Tokyo Medical and Dental UniversityTokyo113-8510Japan
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3
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Khan J, Yadav N, Tyagi A, Hazra CK. Silyl Cation-Initiated, Brønsted Acid-Catalyzed Strategy toward Unsymmetrical 3,3-Disubstituted 2-Oxindoles and Azonazine Cores. J Org Chem 2022; 87:11097-11111. [PMID: 35930369 DOI: 10.1021/acs.joc.2c01351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Herein, a mild, metal-free, robust approach for synthesizing valuable and sterically demanding unsymmetrical 3,3-disubstituted 2-oxindoles via reductive cyclization of α-ketoamides is reported. This operationally simple protocol is initiated by a silyl cation and further catalyzed by a Brønsted acid. We have utilized a wide range of arenes, amines, and thiols as coupling partners with various α-ketoamides. The products were afforded in excellent regioselectivity and good functional group tolerance. This procedure provides easy access to the scaffolds of azonazine and its derivatives with an excellent syn-diastereoselectivity bearing all-carbon quaternary stereocenters.
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Affiliation(s)
- Jabir Khan
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Naveen Yadav
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Aparna Tyagi
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Chinmoy Kumar Hazra
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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4
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Muthusamy S, Prabu A. BF 3·OEt 2 catalyzed decarbonylative arylation/C-H functionalization of diazoamides with arylaldehydes: synthesis of substituted 3-aryloxindoles. Org Biomol Chem 2022; 20:2209-2216. [PMID: 35229865 DOI: 10.1039/d2ob00003b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A metal-free BF3·OEt2 catalyzed direct decarbonylative arylation of diazoamides with readily accessible aryl aldehydes under an open-air atmosphere was developed to afford 3-aryloxindoles via 1,2-aryl migration with high selectivity. The reaction offers an efficient pathway for 3-arylation of diazoamides under relatively mild conditions, which shows a high level of functional group tolerance of both electron-donating and electron-withdrawing groups with a broad substrate scope. 3-Aryloxindoles were also obtained by a substituent-controlled chemo- and site-selective C-H bond functionalization of unprotected salicylaldehyde derivatives.
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Affiliation(s)
| | - Ammasi Prabu
- School of Chemistry, Bharathidasan University, Tiruchirappalli-620 024, India.
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5
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Li C. On Inventing
Cross‐Dehydrogenative
Coupling (
CDC
): Forming C—C Bond from Two Different C—H Bonds. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202100796] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chao‐Jun Li
- Department of Chemistry, FQRNT Centre for Green Chemistry and Catalysis McGill University 801 Sherbrooke Street W., Montreal Quebec H3A0B8 Canada
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6
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Mintz T, More NY, Gaster E, Pappo D. Iron-Catalyzed Oxidative Cross-Coupling of Phenols and Tyrosine Derivatives with 3-Alkyloxindoles. J Org Chem 2021; 86:18164-18178. [PMID: 34881564 DOI: 10.1021/acs.joc.1c02435] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, a novel iron-catalyzed oxidative cross-coupling reaction between phenols and 3-alkyloxindole derivatives is reported. The efficient method, which is based on the FeCl3 catalyst and the t-BuOOt-Bu oxidant in 1,2-dichloroethane at 70 °C, affords 3-alkyl-3-(hydroxyaryl)oxindole compounds with a high degree of selectivity. The generality of the conditions was proven by reacting various substituted phenols, naphthols, and tyrosine derivatives with 3-alkyloxindoles. To apply the chemistry for the conjugation of tyrosine-containing short peptides with oxindolylalanine (Oia) derivatives, the reaction conditions were modified [Fe(O2CCF3)3 catalyst, t-BuOOt-Bu, HFIP, 70 °C], and amino acids with acid-stable N-protecting groups were used.
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Affiliation(s)
- Tomer Mintz
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Nagnath Yadav More
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Eden Gaster
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Doron Pappo
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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7
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Zheng L, Cai L, Tao K, Xie Z, Lai Y, Guo W. Progress in Photoinduced Radical Reactions using Electron Donor‐Acceptor Complexes. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100009] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lvyin Zheng
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Liuhuan Cai
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Kailiang Tao
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Zhen Xie
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Yin‐Long Lai
- College of Chemistry and Civil Engineering Shaoguan University Shaoguan 512005 P. R. China
| | - Wei Guo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
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8
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Rana S, Biswas JP, Paul S, Paik A, Maiti D. Organic synthesis with the most abundant transition metal–iron: from rust to multitasking catalysts. Chem Soc Rev 2021; 50:243-472. [DOI: 10.1039/d0cs00688b] [Citation(s) in RCA: 85] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The promising aspects of iron in synthetic chemistry are being explored for three-four decades as a green and eco-friendly alternative to late transition metals. This present review unveils these rich iron-chemistry towards different transformations.
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Affiliation(s)
- Sujoy Rana
- Department of Chemistry
- University of North Bengal
- Darjeeling
- India
| | | | - Sabarni Paul
- Department of Chemistry
- University of North Bengal
- Darjeeling
- India
| | - Aniruddha Paik
- Department of Chemistry
- University of North Bengal
- Darjeeling
- India
| | - Debabrata Maiti
- Department of Chemistry
- IIT Bombay
- Mumbai-400076
- India
- Tokyo Tech World Research Hub Initiative (WRHI)
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9
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Basnet P, Sebold MB, Hendrick CE, Kozlowski MC. Copper Catalyzed Oxidative Arylation of Tertiary Carbon Centers. Org Lett 2020; 22:9524-9528. [PMID: 33263410 DOI: 10.1021/acs.orglett.0c03581] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We describe herein a Cu(OTf)2 catalyzed oxidative arylation of a tertiary carbon-containing substrate including aryl malononitriles, 3-aryl benzofuran-2-ones, and 3-aryl oxindoles. In some cases, the nitrile groups of the aryl malononitriles undergo further reactions leading to lactones or imines. These reaction conditions are applicable for a range of arenes, including phenols, anilines, anisoles, and heteroarenes. Mechanistic studies support the formation of a cationic intermediate via a two-electron oxidation.
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Affiliation(s)
- Prakash Basnet
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Melissa B Sebold
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Charles E Hendrick
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Marisa C Kozlowski
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
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10
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Sugawara M, Ohnishi R, Ezawa T, Akakabe M, Sawamura M, Hojo D, Hashizume D, Sohtome Y, Sodeoka M. Regiodivergent Oxidative Cross-Coupling of Catechols with Persistent tert-Carbon Radicals. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03986] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Masumi Sugawara
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Rikako Ohnishi
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura-ku, Saitama 338-8570, Japan
| | - Tetsuya Ezawa
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Mai Akakabe
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Miki Sawamura
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Daiki Hojo
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Daisuke Hashizume
- RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yoshihiro Sohtome
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Mikiko Sodeoka
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura-ku, Saitama 338-8570, Japan
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11
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Nie XX, Huang YH, Wang P. Thianthrenation-Enabled α-Arylation of Carbonyl Compounds with Arenes. Org Lett 2020; 22:7716-7720. [DOI: 10.1021/acs.orglett.0c02913] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Xiao-Xue Nie
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences (CAS), 345 Lingling Road, Shanghai 200032, P. R. China
| | - Yu-Hao Huang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences (CAS), 345 Lingling Road, Shanghai 200032, P. R. China
| | - Peng Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences (CAS), 345 Lingling Road, Shanghai 200032, P. R. China
- CAS Key Laboratory of Energy Regulation Materials, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032, P. R. China
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12
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Xu DZ, Hu RM, Lai YH. Iron-Catalyzed Aerobic Oxidative Cross-Dehydrogenative C(sp3)–H/X–H (X = C, N, S) Coupling Reactions. Synlett 2020. [DOI: 10.1055/s-0040-1707195] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The direct functionalization of C(sp3)–H bonds is an attractive research topic in organic synthetic chemistry. The cross-dehydrogenative coupling (CDC) reaction provides a simple and powerful tool for the construction of C–C and C–heteroatom bonds. Recently, some progress has been made in the iron-catalyzed aerobic oxidative CDC reactions. Here, we present recent developments in the direct functionalization of C(sp3)–H bonds catalyzed by simple iron salts with molecular oxygen as the terminal oxidant.1 Introduction2 C(sp3)–C Bond Formation3 C(sp3)–N Bond Formation4 C(sp3)–S(Se) Bond Formation5 Conclusion and Outlook
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13
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Tsuji T, Tanaka T, Tanaka T, Yazaki R, Ohshima T. Catalytic Aerobic Cross-Dehydrogenative Coupling of Azlactones en Route to α,α-Disubstituted α-Amino Acids. Org Lett 2020; 22:4164-4170. [PMID: 32396012 DOI: 10.1021/acs.orglett.0c01248] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We developed a catalytic aerobic method to synthesize α,α-disubstituted α-amino acids through cross-dehydrogenative coupling of azlactones. Combining an iron catalyst with a bisoxazolidine ligand resulted in high catalytic performance, and cross-coupling with an indole proceeded smoothly under aerobic conditions. A wide variety of α-aryl and aliphatic amino acid derived azlactones were applied to the present catalysis. In addition, a quaternary carbon could be constructed using oxindole and benzofuranone under aerobic conditions.
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Affiliation(s)
- Taro Tsuji
- Graduate School of Pharmaceutical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Takafumi Tanaka
- Graduate School of Pharmaceutical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Tsukushi Tanaka
- Graduate School of Pharmaceutical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Ryo Yazaki
- Graduate School of Pharmaceutical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Takashi Ohshima
- Graduate School of Pharmaceutical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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14
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Moreno-Cabrerizo C, Ortega-Martínez A, Esteruelas MA, López AM, Nájera C, Sansano JM. Deacylative Alkylation vs. Photoredox Catalysis in the Synthesis of 3,3'-Bioxindoles. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000375] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Cristina Moreno-Cabrerizo
- Department of Organic Chemistry; and Instituto de Síntesis Orgánica (ISO); University of Alicante; PO Box 99 03080 Alicante Spain
- Centro de Innovación en Química Avanzada; ORFEO-CINQA; Spain
| | - Aitor Ortega-Martínez
- Department of Organic Chemistry; and Instituto de Síntesis Orgánica (ISO); University of Alicante; PO Box 99 03080 Alicante Spain
- Centro de Innovación en Química Avanzada; ORFEO-CINQA; Spain
| | - Miguel A. Esteruelas
- Centro de Innovación en Química Avanzada; ORFEO-CINQA; Spain
- Departamento de Química Inorgánica; Instituto de Síntesis Química y Catálisis Homogénea; Universidad de Zaragoza-CSIC; 50009 Zaragoza Spain
| | - Ana M. López
- Centro de Innovación en Química Avanzada; ORFEO-CINQA; Spain
- Departamento de Química Inorgánica; Instituto de Síntesis Química y Catálisis Homogénea; Universidad de Zaragoza-CSIC; 50009 Zaragoza Spain
| | - Carmen Nájera
- Centro de Innovación en Química Avanzada; ORFEO-CINQA; Spain
| | - José M. Sansano
- Department of Organic Chemistry; and Instituto de Síntesis Orgánica (ISO); University of Alicante; PO Box 99 03080 Alicante Spain
- Centro de Innovación en Química Avanzada; ORFEO-CINQA; Spain
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15
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Anticancer Molecule Discovery via C2-Substituent Promoted Oxidative Coupling of Indole and Enolate. iScience 2019; 22:214-228. [PMID: 31786518 PMCID: PMC6909134 DOI: 10.1016/j.isci.2019.11.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 11/09/2019] [Accepted: 11/12/2019] [Indexed: 01/10/2023] Open
Abstract
C2, C3-disubstituted indole is one of the most frequently encountered motifs in bioactive alkaloids and medicinal chemistry. Thus, developing novel, concise, and efficient access to it is highly desired in drug discovery. Herein, we present such an approach to this scaffold by direct oxidative coupling of C2-substituted indoles and enolates. Compared with indole bearing no C2-substituent, higher yields (up to 96%) were obtained for C2-substituted indoles in most cases. Mechanistic studies showed the reaction went through a Fe-chelated radical-anion oxidative coupling procedure promoted by C2-substituent on indole by two means: (1) stabilizing C2-radical intermediate during the reaction; (2) reducing indole homocoupling. This approach serves as a synthetic useful tool to quickly build up bioactive small molecule library of C2, C3-disubstituted indoles, and several products showed promising anticancer activities. Besides, indomethacin and its analogs were conveniently prepared in three-step sequence efficiently, indicating the potential application of our approach in medicinal chemistry. Fe-mediated, C2-substitutent promoted oxidative coupling of indoles and enolates Three-steps to prepare indomethacin and its analogues Quick access to complex indoles library bearing anticancer bioactivities
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16
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Wu H, Qiu C, Zhang Z, Zhang B, Zhang S, Xu Y, Zhou H, Su C, Loh KP. Graphene‐Oxide‐Catalyzed Cross‐Dehydrogenative Coupling of Oxindoles with Arenes and Thiophenols. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901224] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Hongru Wu
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale OptoeletronicsShenzhen University Shenzhen 518060 People's Republic of China E-mail addresses
| | - Chuntian Qiu
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale OptoeletronicsShenzhen University Shenzhen 518060 People's Republic of China E-mail addresses
| | - Zhaofei Zhang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale OptoeletronicsShenzhen University Shenzhen 518060 People's Republic of China E-mail addresses
| | - Bing Zhang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale OptoeletronicsShenzhen University Shenzhen 518060 People's Republic of China E-mail addresses
| | - Shaolong Zhang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale OptoeletronicsShenzhen University Shenzhen 518060 People's Republic of China E-mail addresses
- Department of Chemistry, Department of ChemistryNational University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Yangsen Xu
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale OptoeletronicsShenzhen University Shenzhen 518060 People's Republic of China E-mail addresses
| | - Hongwei Zhou
- College of Biological, Chemical Science and EngineeringJiaxing University 118 Jiahang Road Jiaxing 314001 People's Republic of China
| | - Chenliang Su
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale OptoeletronicsShenzhen University Shenzhen 518060 People's Republic of China E-mail addresses
| | - Kian Ping Loh
- Department of Chemistry, Department of ChemistryNational University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
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17
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Huang CY, Kang H, Li J, Li CJ. En Route to Intermolecular Cross-Dehydrogenative Coupling Reactions. J Org Chem 2019; 84:12705-12721. [DOI: 10.1021/acs.joc.9b01704] [Citation(s) in RCA: 143] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Chia-Yu Huang
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Hyotaik Kang
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Jianbin Li
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Chao-Jun Li
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
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18
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Hong G, Nahide PD, Neelam UK, Amadeo P, Vijeta A, Curto JM, Hendrick CE, VanGelder KF, Kozlowski MC. Palladium-Catalyzed Chemoselective Activation of sp 3 vs sp 2 C-H Bonds: Oxidative Coupling To Form Quaternary Centers. ACS Catal 2019; 9:3716-3724. [PMID: 31777683 DOI: 10.1021/acscatal.9b00091] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The oxidative activation of alkyl C-H bonds vs arene C-H bonds with Pd(OAc)2 has been found to be generalizable to a number of nucleophilic substrates allowing the formation of a range of hindered quaternary centers. The substrates share a common mechanistic path wherein Pd(II) initiates an oxidative dimerization. The resultant dimer modifies the palladium catalyst to favor activation of alkyl C-H bonds in contrast to the trends typically observed via a concerted metalation deprotonation mechanism. Notably, insertion occurs at the terminus of the alkyl arene for hindered substrates. Two different oxidant systems were discovered that turn over the process. Parameters have been identified that predict, which substrates are productive in this reaction.
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Affiliation(s)
- Gang Hong
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Key Laboratory for Advanced Materials, Institute of Fine Chemicals and School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China
| | - Pradip D. Nahide
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Uday Kumar Neelam
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Peter Amadeo
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Arjun Vijeta
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - John M. Curto
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Charles E. Hendrick
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Kelsey F. VanGelder
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Marisa C. Kozlowski
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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19
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Liang K, Li N, Zhang Y, Li T, Xia C. Transition-metal-free α-arylation of oxindoles via visible-light-promoted electron transfer. Chem Sci 2019; 10:3049-3053. [PMID: 30996886 PMCID: PMC6427940 DOI: 10.1039/c8sc05170d] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 01/20/2019] [Indexed: 01/07/2023] Open
Abstract
An operationally simple photochemical strategy for the direct arylation of oxindoles with (hetero)aryl halides in the absence of both transition metals and photoredox catalysts has been developed. The reaction provides an efficient way to construct various 3-aryloxindole building blocks of pharmaceutical interest at ambient temperature by using household compact fluorescent light (CFL) bulbs as the light source. Preliminarily, mechanistic studies revealed that the intermolecular electron transfer relied on the formation of photon-absorbing electron-donor-acceptor (EDA) complexes between electron-rich oxindole enolates and electron-deficient (hetero)aryl halides, and a radical chain mechanism was operative.
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Affiliation(s)
- Kangjiang Liang
- Key Laboratory of Medicinal Chemistry for Natural Resources (Ministry of Education and Yunnan Province) , School of Chemical Science and Technology , Yunnan University , 2 North Cuihu Road , Kunming 650091 , China .
| | - Na Li
- Key Laboratory of Medicinal Chemistry for Natural Resources (Ministry of Education and Yunnan Province) , School of Chemical Science and Technology , Yunnan University , 2 North Cuihu Road , Kunming 650091 , China .
| | - Yang Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resources (Ministry of Education and Yunnan Province) , School of Chemical Science and Technology , Yunnan University , 2 North Cuihu Road , Kunming 650091 , China .
| | - Tao Li
- Key Laboratory of Medicinal Chemistry for Natural Resources (Ministry of Education and Yunnan Province) , School of Chemical Science and Technology , Yunnan University , 2 North Cuihu Road , Kunming 650091 , China .
| | - Chengfeng Xia
- Key Laboratory of Medicinal Chemistry for Natural Resources (Ministry of Education and Yunnan Province) , School of Chemical Science and Technology , Yunnan University , 2 North Cuihu Road , Kunming 650091 , China .
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20
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Gao YT, Jin XY, Liu Q, Liu AD, Cheng L, Wang D, Liu L. Iodide/H₂O₂ Catalyzed Intramolecular Oxidative Amination for the Synthesis of 3,2'-Pyrrolidinyl Spirooxindoles. Molecules 2018; 23:molecules23092265. [PMID: 30189635 PMCID: PMC6225319 DOI: 10.3390/molecules23092265] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 08/21/2018] [Accepted: 08/24/2018] [Indexed: 12/13/2022] Open
Abstract
An ammonium iodide/hydrogen peroxide-mediated intramolecular oxidative amination of 3-aminoalkyl-2-oxindoles was achieved, affording the corresponding 3,2'-pyrrolidinyl spirooxindoles and their 6- or 7-membered analogous in moderate to high yields. This metal-free procedure features very mild reaction conditions, non-toxicity and easily handled hydrogen peroxide as a clean oxidant.
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Affiliation(s)
- Yu-Ting Gao
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Xiao-Yang Jin
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Qi Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - An-Di Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Liang Cheng
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Dong Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Li Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
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21
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Li Y, Li JH. Decarbonylative Formation of Homoallyl Radical Capable of Annulation with N-Arylpropiolamides via Aldehyde Auto-oxidation. Org Lett 2018; 20:5323-5326. [PMID: 30146885 DOI: 10.1021/acs.orglett.8b02243] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new metal-free aldehyde auto-oxidation strategy that allows the decarbonylative formation of homoallyl radical capable of cascade annulations with alkynes is described. By using various N-arylpropiolamides, the oxidative radical [3 + 2]/[5 + 2] cascade annulation reaction was achieved to produce benzo[ b]cyclopenta[ e]azepin-4(1 H)-ones, which represent a powerful new platform for the intermolecular cycloadditions of alkyne with broad substrate scope and high selectivity.
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Affiliation(s)
- Yang Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle , Nanchang Hangkong University , Nanchang 330063 , China
| | - Jin-Heng Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle , Nanchang Hangkong University , Nanchang 330063 , China.,State Key Laboratory of Applied Organic Chemistry , Lanzhou University , Lanzhou 730000 , China
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22
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Reddy Panyam PK, Ugale B, Gandhi T. Palladium(II)/N-Heterocyclic Carbene Catalyzed One-Pot Sequential α-Arylation/Alkylation: Access to 3,3-Disubstituted Oxindoles. J Org Chem 2018; 83:7622-7632. [PMID: 29882669 DOI: 10.1021/acs.joc.8b00264] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Rationally designed fluorene-based mono- and bimetallic Pd-PEPPSI complexes were synthesized and demonstrated to be effective for the one-pot sequential α-arylation/alkylation of oxindoles. This streamlined approach offers efficient access to functionalized 3,3-disubstituted oxindoles in excellent yields (up to 89%) under mild reaction conditions.
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Affiliation(s)
| | - Bharat Ugale
- Department of Chemistry , Indian Institute of Technology Ropar , Rupnagar , Punjab 140001 , India
| | - Thirumanavelan Gandhi
- Department of Chemistry, School of Advanced Sciences , VIT University , Vellore 632014 , India
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23
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Chen WT, Wei WT. Recent Developments in the C(sp3
)−H Functionalization of 2-Oxindoles through Radical Reactions. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800209] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Wei-Ting Chen
- School of Materials Science and Chemical Engineering; Ningbo University; Ningbo 315211 P. R. China
| | - Wen-Ting Wei
- School of Materials Science and Chemical Engineering; Ningbo University; Ningbo 315211 P. R. China
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24
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Tanaka T, Tanaka T, Tsuji T, Yazaki R, Ohshima T. Strategy for Catalytic Chemoselective Cross-Enolate Coupling Reaction via a Transient Homocoupling Dimer. Org Lett 2018; 20:3541-3544. [DOI: 10.1021/acs.orglett.8b01313] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Takafumi Tanaka
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
| | - Tsukushi Tanaka
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
| | - Taro Tsuji
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
| | - Ryo Yazaki
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
| | - Takashi Ohshima
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
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25
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Jin XY, Xie LJ, Cheng HP, Liu AD, Li XD, Wang D, Cheng L, Liu L. Ruthenium-Catalyzed Decarboxylative C–H Alkenylation in Aqueous Media: Synthesis of Tetrahydropyridoindoles. J Org Chem 2018; 83:7514-7522. [DOI: 10.1021/acs.joc.8b00229] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiao-Yang Jin
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Li-Jun Xie
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hou-Ping Cheng
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - An-Di Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xue-Dong Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dong Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Liang Cheng
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Li Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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26
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Liu Y, Wang QL, Zhou CS, Xiong BQ, Zhang PL, Yang CA, Tang KW. Oxidative C-C Bond Functionalization of Methylenecyclopropanes with Aldehydes for the Formation of 2-Acyl-3,4-dihydronaphthalenes. J Org Chem 2018; 83:4657-4664. [PMID: 29584957 DOI: 10.1021/acs.joc.8b00427] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A new FeCl2- and DTBP (di- tert-butyl peroxide)-promoted oxidative ring-opening and cyclization of methylenecyclopropanes with aldehydes for the synthesis of 2-acyl-3,4-dihydronaphthalenes is presented. This oxidative cyclization reaction proceeds via a radical addition, ring-opening, and cyclization sequence facilitated by a Lewis acid, and it offers a practical and straightforward route for the oxidative cyclization of methylenecyclopropanes with an aromatic carbon and a C(sp2)-H bond by simultaneously forming two new carbon-carbon bonds.
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Affiliation(s)
- Yu Liu
- Department of Chemistry and Chemical Engineering , Hunan Institute of Science and Technology , Yueyang 414006 , China
| | - Qiao-Lin Wang
- Department of Chemistry and Chemical Engineering , Hunan Institute of Science and Technology , Yueyang 414006 , China
| | - Cong-Shan Zhou
- Department of Chemistry and Chemical Engineering , Hunan Institute of Science and Technology , Yueyang 414006 , China
| | - Bi-Quan Xiong
- Department of Chemistry and Chemical Engineering , Hunan Institute of Science and Technology , Yueyang 414006 , China
| | - Pan-Liang Zhang
- Department of Chemistry and Chemical Engineering , Hunan Institute of Science and Technology , Yueyang 414006 , China
| | - Chang-An Yang
- Department of Chemistry and Chemical Engineering , Hunan Institute of Science and Technology , Yueyang 414006 , China
| | - Ke-Wen Tang
- Department of Chemistry and Chemical Engineering , Hunan Institute of Science and Technology , Yueyang 414006 , China
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27
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Liu JJ, Huang HY, Cheng L, Liu Q, Wang D, Liu L. A catalyst-free intermolecular trans-iodoalkylation of alkynes. Org Biomol Chem 2018; 16:899-903. [PMID: 29350733 DOI: 10.1039/c7ob03159a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the first catalyst-free and trans-selective iodoalkylation reaction of alkynes with a series of α-carbonyl compounds. This unprecedented three-component iodoalkylation reaction is enabled by using (iodoethynyl)trimethylsilane as a radical initiator and iodide source. The 1,2-difunctionalization affords alkenyl iodides, which are versatile building blocks for the construction of tri-substituted alkene derivatives.
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Affiliation(s)
- Jie-Jie Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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28
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Qi J, Wang Z, Lang B, Lu P, Wang Y. TfOH-Catalyzed Reaction between 3-Diazoindolin-2-imines and Electron-Rich Arenes: Access to 3-Aryl-2-aminoindoles. J Org Chem 2017; 82:12640-12646. [PMID: 29125292 DOI: 10.1021/acs.joc.7b02423] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
TfOH-catalyzed reactions between 3-diazoindolin-2-imines and electron-rich arenes were disclosed. These metal-free reactions furnished 3-aryl-2-aminoindoles in moderate to excellent yields with the tolerance of a broad range of functional groups.
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Affiliation(s)
- Jie Qi
- Department of Chemistry, Zhejiang University , Hangzhou 310027, P. R. China
| | - Zaibin Wang
- Department of Chemistry, Zhejiang University , Hangzhou 310027, P. R. China
| | - Bo Lang
- Department of Chemistry, Zhejiang University , Hangzhou 310027, P. R. China
| | - Ping Lu
- Department of Chemistry, Zhejiang University , Hangzhou 310027, P. R. China
| | - Yanguang Wang
- Department of Chemistry, Zhejiang University , Hangzhou 310027, P. R. China
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29
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Tzouras NV, Stamatopoulos IK, Papastavrou AT, Liori AA, Vougioukalakis GC. Sustainable metal catalysis in C H activation. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.04.012] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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30
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Duan J, Kwong FY. A Palladium-Catalyzed α-Arylation of Oxindoles with Aryl Tosylates. J Org Chem 2017; 82:6468-6473. [PMID: 28539045 DOI: 10.1021/acs.joc.7b00855] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A palladium-catalyzed monoselective C3 arylation of 2-oxindoles with aryl tosylates is described. With the Pd/CM-phos catalyst system, the corresponding 3-arylated oxindoles can be obtained in good to excellent yields (≤97%). The reaction conditions are mild (using 0.5 mol % Pd in general and KF as a base), and functional groups such as methyl ester, NH amido, and enolizable keto moieties are found to be compatible.
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Affiliation(s)
- Jindian Duan
- Department of Applied Biology and Chemical Technology and SKL of Chirosciences, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong
| | - Fuk Yee Kwong
- Department of Applied Biology and Chemical Technology and SKL of Chirosciences, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong.,Department of Chemistry, The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong
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31
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Yang Y, Song RJ, Ouyang XH, Wang CY, Li JH, Luo S. Iron-Catalyzed Intermolecular 1,2-Difunctionalization of Styrenes and Conjugated Alkenes with Silanes and Nucleophiles. Angew Chem Int Ed Engl 2017; 56:7916-7919. [DOI: 10.1002/anie.201702349] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Revised: 04/17/2017] [Indexed: 12/16/2022]
Affiliation(s)
- Yuan Yang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
- State Key Laboratory of Chemo/Biosensing and Chemometrics; Hunan University; Changsha 410082 China
| | - Ren-Jie Song
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
- State Key Laboratory of Chemo/Biosensing and Chemometrics; Hunan University; Changsha 410082 China
| | - Xuan-Hui Ouyang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
- State Key Laboratory of Chemo/Biosensing and Chemometrics; Hunan University; Changsha 410082 China
| | - Cheng-Yong Wang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
- State Key Laboratory of Chemo/Biosensing and Chemometrics; Hunan University; Changsha 410082 China
| | - Jin-Heng Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
- State Key Laboratory of Chemo/Biosensing and Chemometrics; Hunan University; Changsha 410082 China
| | - Shenglian Luo
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
- State Key Laboratory of Chemo/Biosensing and Chemometrics; Hunan University; Changsha 410082 China
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32
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Yang Y, Song RJ, Ouyang XH, Wang CY, Li JH, Luo S. Iron-Catalyzed Intermolecular 1,2-Difunctionalization of Styrenes and Conjugated Alkenes with Silanes and Nucleophiles. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702349] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Yuan Yang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
- State Key Laboratory of Chemo/Biosensing and Chemometrics; Hunan University; Changsha 410082 China
| | - Ren-Jie Song
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
- State Key Laboratory of Chemo/Biosensing and Chemometrics; Hunan University; Changsha 410082 China
| | - Xuan-Hui Ouyang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
- State Key Laboratory of Chemo/Biosensing and Chemometrics; Hunan University; Changsha 410082 China
| | - Cheng-Yong Wang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
- State Key Laboratory of Chemo/Biosensing and Chemometrics; Hunan University; Changsha 410082 China
| | - Jin-Heng Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
- State Key Laboratory of Chemo/Biosensing and Chemometrics; Hunan University; Changsha 410082 China
| | - Shenglian Luo
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
- State Key Laboratory of Chemo/Biosensing and Chemometrics; Hunan University; Changsha 410082 China
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33
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Sattar M, Rathore V, Prasad CD, Kumar S. Transition-metal-free Chemoselective Oxidative C-C Coupling of the sp 3 C-H Bond of Oxindoles with Arenes and Addition to Alkene: Synthesis of 3-Aryl Oxindoles, and Benzofuro- and Indoloindoles. Chem Asian J 2017; 12:734-743. [PMID: 28169505 DOI: 10.1002/asia.201601647] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Revised: 02/03/2017] [Indexed: 01/11/2023]
Abstract
A transition-metal (TM)-free and halogen-free NaOtBu-mediated oxidative cross-coupling between the sp3 C-H bond of oxindoles and sp2 C-H bond of nitroarenes has been developed to access 3-aryl substituted and 3,3-aryldisubstituted oxindoles in DMSO at room temperature in a short time. Interestingly, the sp3 C-H bond of oxindoles could also react with styrene under TM-free conditions for the practical synthesis of quaternary 3,3-disubstituted oxindoles. The synthesized 3-oxindoles have also been further transformed into advanced heterocycles, that is, benzofuroindoles, indoloindoles, and substituted indoles. Mechanistic experiments of the reaction suggests the formation of an anion intermediate from the sp3 C-H bond of oxindole by tert-butoxide base in DMSO. The addition of nitrobenzene to the in-situ generated carbanion leads to the 3-(nitrophenyl)oxindolyl carbanion in DMSO which is subsequently oxidized to 3-(nitro-aryl) oxindole by DMSO.
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Affiliation(s)
- Moh Sattar
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Bhopal Bypass Road, Bhauri Bhopal, Madhya Pradesh, 462066, India
| | - Vandana Rathore
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Bhopal Bypass Road, Bhauri Bhopal, Madhya Pradesh, 462066, India
| | - Ch Durga Prasad
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Bhopal Bypass Road, Bhauri Bhopal, Madhya Pradesh, 462066, India
| | - Sangit Kumar
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Bhopal Bypass Road, Bhauri Bhopal, Madhya Pradesh, 462066, India
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34
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Varun BV, Dhineshkumar J, Bettadapur KR, Siddaraju Y, Alagiri K, Prabhu KR. Recent advancements in dehydrogenative cross coupling reactions for CC bond formation. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.01.035] [Citation(s) in RCA: 121] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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35
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Huang HY, Cheng L, Liu JJ, Wang D, Liu L, Li CJ. Transition-Metal-Free Alkynylation of 2-Oxindoles through Radical–Radical Coupling. J Org Chem 2017; 82:2656-2663. [DOI: 10.1021/acs.joc.6b03057] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Hong-Yan Huang
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Liang Cheng
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jie-Jie Liu
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dong Wang
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Li Liu
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chao-Jun Li
- Department
of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
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36
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Du Y, Yu A, Jia J, Zhang Y, Meng X. Direct N–H/α,α,β,β-C(sp3)–H functionalization of piperidine via an azomethine ylide route: synthesis of spirooxindoles bearing 3-substituted oxindoles. Chem Commun (Camb) 2017; 53:1684-1687. [DOI: 10.1039/c6cc08996h] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A protocol for the direct functionalization of N–H/α,α,β,β-C(sp3)–H of piperidine without any metal or external oxidants is reported.
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Affiliation(s)
- Yanlong Du
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
- School of Chemistry & Chemical Engineering Tianjin University of Technology
- Tianjin 300384
- P. R. China
| | - Aimin Yu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
- School of Chemistry & Chemical Engineering Tianjin University of Technology
- Tianjin 300384
- P. R. China
| | - Jiru Jia
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
- School of Chemistry & Chemical Engineering Tianjin University of Technology
- Tianjin 300384
- P. R. China
| | - Youquan Zhang
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
- School of Chemistry & Chemical Engineering Tianjin University of Technology
- Tianjin 300384
- P. R. China
| | - Xiangtai Meng
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
- School of Chemistry & Chemical Engineering Tianjin University of Technology
- Tianjin 300384
- P. R. China
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37
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Yu JB, Zhang Y, Jiang ZJ, Su WK. Mechanically Induced Fe(III) Catalysis at Room Temperature: Solvent-Free Cross-Dehydrogenative Coupling of 3-Benzylic Indoles with Methylenes/Indoles. J Org Chem 2016; 81:11514-11520. [PMID: 27779398 DOI: 10.1021/acs.joc.6b02197] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
An Fe(III)-catalyzed solvent-free cross-dehydrogenative coupling of 3-benzylic indoles and compounds with acidic methylene groups has been achieved under high-speed ball-milling (HSBM) conditions at room temperature. The reactions afford desired 3-arylmethylindole derivatives in moderate to high yields within 21 min of grinding. Besides, both N-substituted and N-free indoles can take part in this mechanochemical reaction as efficient nucleophiles to give bisindoles with satisfactory results. Remarkably, this protocol displays the possibility to induce high activity when using iron catalysts under HSBM conditions.
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Affiliation(s)
- Jing-Bo Yu
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology , Hangzhou 310014, P. R. China
| | - Yang Zhang
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology , Hangzhou 310014, P. R. China
| | - Zhi-Jiang Jiang
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology , Hangzhou 310014, P. R. China
| | - Wei-Ke Su
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology , Hangzhou 310014, P. R. China
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38
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Affiliation(s)
- Miaoshen Su
- Hebei Key Laboratory of Bioinorganic Chemistry, College of Sciences; Agricultural University of Hebei; Baoding 071001 China
| | - Cheng Li
- Hebei Key Laboratory of Bioinorganic Chemistry, College of Sciences; Agricultural University of Hebei; Baoding 071001 China
| | - Jingjun Ma
- Hebei Key Laboratory of Bioinorganic Chemistry, College of Sciences; Agricultural University of Hebei; Baoding 071001 China
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39
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Chen T, Li YF, An Y, Zhang FM. Iron-Catalyzed α-Arylation of Deoxybenzoins with Arenes through an Oxidative Dehydrogenative Approach. Org Lett 2016; 18:4754-7. [DOI: 10.1021/acs.orglett.6b02516] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tao Chen
- State Key Laboratory of Applied
Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yi-Fan Li
- State Key Laboratory of Applied
Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yang An
- State Key Laboratory of Applied
Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Fu-Min Zhang
- State Key Laboratory of Applied
Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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40
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Kong DL, Cheng L, Yue T, Wu HR, Feng WC, Wang D, Liu L. Cobalt-Catalyzed Peroxidation of 2-Oxindoles with Hydroperoxides. J Org Chem 2016; 81:5337-44. [DOI: 10.1021/acs.joc.6b00622] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- De-Long Kong
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Liang Cheng
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Tao Yue
- Chemical Technology Academy of Shandong Province, Jinan 250014, China
| | - Hong-Ru Wu
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Wei-Chun Feng
- Chemical Technology Academy of Shandong Province, Jinan 250014, China
| | - Dong Wang
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Li Liu
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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41
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Fe-Catalyzed Cross-Dehydrogenative Coupling Reactions. Top Curr Chem (Cham) 2016; 374:38. [DOI: 10.1007/s41061-016-0038-y] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 05/19/2016] [Indexed: 12/30/2022]
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42
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Zhang Y, Ni M, Feng B. Iron-catalyzed direct α-arylation of α-amino carbonyl compounds with indoles. Org Biomol Chem 2016; 14:1550-4. [PMID: 26739751 DOI: 10.1039/c5ob02325d] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mild and general α-arylation of α-amino carbonyls with indoles catalyzed by Fe(ClO4)3 has been developed. C-H activation is smoothly fulfilled by using TBHP as the oxidant with good yields. Two hydrogen dissociations make this transformation more environmentally benign because of high atom efficiency.
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Affiliation(s)
- Yan Zhang
- School of Pharmaceutical Science, Jiangnan University, Wuxi 214122, P. R. China.
| | - Minjie Ni
- School of Pharmaceutical Science, Jiangnan University, Wuxi 214122, P. R. China.
| | - Bainian Feng
- School of Pharmaceutical Science, Jiangnan University, Wuxi 214122, P. R. China.
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43
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Wu HR, Cheng L, Kong DL, Huang HY, Gu CL, Liu L, Wang D, Li CJ. FeCl3-Mediated Radical Tandem Reactions of 3-Benzyl-2-oxindoles with Styrene Derivatives for the Stereoselective Synthesis of Spirocyclohexene Oxindoles. Org Lett 2016; 18:1382-5. [DOI: 10.1021/acs.orglett.6b00234] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hong-Ru Wu
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Liang Cheng
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - De-Long Kong
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hong-Yan Huang
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chun-Ling Gu
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Li Liu
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Dong Wang
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Chao-Jun Li
- Department
of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
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44
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Lim JW, Kim KH, Moon HR, Kim JN. Transition metal and base-free synthesis of 3,3-diaryl-2-oxindoles from 2,2,N-triarylacetamides. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.01.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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45
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Zhang W, Luo M. Iron-catalyzed synthesis of arylsulfinates through radical coupling reaction. Chem Commun (Camb) 2016; 52:2980-3. [DOI: 10.1039/c5cc09830k] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A novel iron-catalyzed synthesis of arylsulfinates from diaryliodonium salts and rongalite through radical coupling reaction is described. Desired products can be prepared in good yields in air at room temperature in 20 minutes without the need for any ligands and additives.
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Affiliation(s)
- Weixi Zhang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- People's Republic of China
| | - Meiming Luo
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- People's Republic of China
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46
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Wang X, Dong K, Yan B, Zhang C, Qiu L, Xu X. NBS-mediated dinitrogen extrusion of diazoacetamides under catalyst-free conditions: practical access to 3-bromooxindole derivatives. RSC Adv 2016. [DOI: 10.1039/c6ra16868j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A synthetically useful reaction via NBS-mediated dinitrogen extrusion of N-aryl diazoacetamides under catalyst-free conditions is disclosed, which gives the 3-bromooxindoles in high to excellent yields with high selectivity via a non carbene process.
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Affiliation(s)
- Xiangbo Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Kuiyong Dong
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Bin Yan
- Jinghua Anti-cancer Pharmaceutical Engineering Center
- Nantong 226407
- China
| | - Cheng Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Lihua Qiu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Xinfang Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
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