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Ishihara N, Harada S, Nakajima M, Arai S. Isatogenols as Precursors for the Synthesis of Fully Substituted Indolines through Regio- and Stereoselective [3 + 2] Cycloaddition Using Various Olefins. Org Lett 2024; 26:2908-2912. [PMID: 38557071 DOI: 10.1021/acs.orglett.4c00243] [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
Here, we describe a unique reactivity of isatogen derivatives bearing a hydroxy group at the C3-position (isatogenol) and their synthetic application to highly regio- and stereoselective [3 + 2] cycloaddition reactions. This method provides facile access to polyfused and highly functionalized heterocycles including consecutive stereocenters. Furthermore, DFT calculations revealed that hydrogen bonding is a key to controlling the regio- and stereoselectivity in the cycloaddition using acrylates.
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Affiliation(s)
- Nanaka Ishihara
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Shinji Harada
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
- Institute for Advanced Academic Research, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
- Molecular Chirality Research Center, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Masaya Nakajima
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shigeru Arai
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
- Molecular Chirality Research Center, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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Lu S, Chen X, Chang X, Zhang S, Zhang D, Zhao Y, Yang L, Ma Y, Sun P. Boron-catalysed transition-metal-free arylation and alkenylation of allylic alcohols with boronic acids. RSC Adv 2023; 13:3329-3332. [PMID: 36756407 PMCID: PMC9869934 DOI: 10.1039/d2ra07919d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 01/15/2023] [Indexed: 01/24/2023] Open
Abstract
The development of efficient catalytic reactions with excellent atom and step economy employing sustainable catalysts is highly sought-after in chemical synthesis to reduce the negative effects on the environment. The most commonly-used strategy to construct allylic compounds relies on the transition-metal-catalysed nucleophilic substitution reaction of allylic alcohol derivatives. These syntheses exhibit good yield and selectivity, albeit at the expense of toxic and expensive catalysts and extra steps. In this paper, we report a transition-metal-free arylation and alkenylation reaction between unprotected allylic alcohols and boronic acids. The reactions were performed with B(C6F5)3 as the catalyst in toluene, and corresponding products were obtained in 23-92% yields. The reaction has mild conditions, scalability, excellent atom and step economy.
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Affiliation(s)
- Sixian Lu
- Institute of Chinese Materia Medica and Artemisinin Research Center, Academy of Chinese Medical Sciences Beijing 100700 China
| | - Xingyu Chen
- School of Pharmacy, Chengdu UniversityChengduSichuan610106China
| | - Xiaoqiang Chang
- Institute of Chinese Materia Medica and Artemisinin Research Center, Academy of Chinese Medical Sciences Beijing 100700 China
| | - Shuaichen Zhang
- Institute of Chinese Materia Medica and Artemisinin Research Center, Academy of Chinese Medical Sciences Beijing 100700 China
| | - Dong Zhang
- Institute of Chinese Materia Medica and Artemisinin Research Center, Academy of Chinese Medical Sciences Beijing 100700 China
| | - Yifan Zhao
- Institute of Chinese Materia Medica and Artemisinin Research Center, Academy of Chinese Medical Sciences Beijing 100700 China
| | - Lan Yang
- Institute of Chinese Materia Medica and Artemisinin Research Center, Academy of Chinese Medical Sciences Beijing 100700 China
| | - Yue Ma
- Institute of Chinese Materia Medica and Artemisinin Research Center, Academy of Chinese Medical Sciences Beijing 100700 China
| | - Peng Sun
- Institute of Chinese Materia Medica and Artemisinin Research Center, Academy of Chinese Medical Sciences Beijing 100700 China
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Cai X, Shen Y, Li W, Zhan W, Zhang F, Xu C, Song H. Low-Valent Tungsten-Catalyzed Controllable Oxidative Dehydrogenative Coupling of Anilines. Org Lett 2023; 25:240-245. [PMID: 36573686 DOI: 10.1021/acs.orglett.2c04090] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Herein, we have developed an efficient tungsten-catalyzed homogeneous system for oxidative dehydrogenative coupling of anilines to selectively produce various azoaromatics and azoxyaromatics as well as 2-substituted indolone N-oxides by simply regulating the reaction solvent with peroxide as a terminal oxidant under additive-free conditions. These findings provide an experimental framework for exploring tungsten catalysis in organic synthesis and offer an efficient and convenient tactic for the selective oxidation of anilines.
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Affiliation(s)
- Xingwei Cai
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, People's Republic of China
| | - Yang Shen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, People's Republic of China
| | - Wei Li
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, People's Republic of China
| | - Wentao Zhan
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, People's Republic of China
| | - Fanjun Zhang
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273100, People's Republic of China
| | - Chen Xu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, People's Republic of China
| | - Heng Song
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, People's Republic of China.,Jiangsu Agrochem Laboratory Company, Limited, Changzhou, Jiangsu 213000, People's Republic of China
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Xiong T, Zhou X, Jiang J. Dearomative oxyphosphorylation of indoles enables facile access to 2,2-disubstituted indolin-3-ones. Org Biomol Chem 2022; 20:5721-5725. [PMID: 35842851 DOI: 10.1039/d2ob01063a] [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 highly efficient oxidative dearomatization of indoles with H-phosphorus oxides in the presence of TEMPO oxoammonium salt has been demonstrated. Through the intramolecular oxidative dearomatization of indoles and subsequent intermolecular nucleophilic addition with phosphorus nucleophile, a variety of structurally diverse arylphosphoryl and alkylphosphoryl indolin-3-ones were obtained in good yields with a broad substrate scope and high functional-group compatibility.
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Affiliation(s)
- Ting Xiong
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi University, Nanning, 530004, P. R. China.
| | - Xingcui Zhou
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi University, Nanning, 530004, P. R. China.
| | - Jun Jiang
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi University, Nanning, 530004, P. R. China.
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Pareek A, Singh G, Yaragorla S. Synthetic Applications of Ambiphilic C‐Acylimines in Organic Synthesis. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Garima Singh
- University of Hyderabad School of Chemistry Chemistry INDIA
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