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Tian G, Jin WL, Qin C, Wang J. Convenient synthesis of N-alkyl-3,1-benzoxazin-2-ones from carbamate protected anthranil aldehydes and ketones via one-step alkylation/alkoxy rearrangement. Org Biomol Chem 2023; 21:5757-5761. [PMID: 37404025 DOI: 10.1039/d3ob00812f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2023]
Abstract
A practical and step-economical protocol was developed to prepare N-alkyl-3,1-benzoxazin-2-one derivatives from anthranil aldehydes and ketones via one-step alkylation/alkoxy rearrangement, where three new chemical bonds and one ring were constructed in a single step. Control studies revealed a stepwise mechanism and that the alkoxy rearrangement was an intermolecular process.
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Affiliation(s)
- Guang Tian
- Department of Chemistry, Shanxi Key Laboratory of Polymer Science & Technology, MOE Key Laboratory of Supernormal Material Physics & Chemistry, School of Chemical & Chemical Engineering, Northwestern Polytechnical University, Xi'an 710129, China.
- State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
| | - Wei-Li Jin
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing 210023, China
- State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
| | - Chuanguang Qin
- Department of Chemistry, Shanxi Key Laboratory of Polymer Science & Technology, MOE Key Laboratory of Supernormal Material Physics & Chemistry, School of Chemical & Chemical Engineering, Northwestern Polytechnical University, Xi'an 710129, China.
| | - Jie Wang
- State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing 210023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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Vayer M, Pastor M, Kofink C, Maulide N. Electrochemical Rearrangement of 3-Hydroxyoxindoles into Benzoxazinones. Org Lett 2021; 24:27-32. [PMID: 34949089 PMCID: PMC8762708 DOI: 10.1021/acs.orglett.1c03569] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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We report an unexpected
rearrangement of 3-hydroxyoxindoles into
benzoxazinones using electrochemistry. Our reaction employs mild and
environmentally friendly conditions, and the benzoxazinone products
are obtained in moderate to excellent yields. Mechanistic experiments
suggest that a peroxide intermediate is likely involved.
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Affiliation(s)
- Marie Vayer
- Christian Doppler Laboratory for Entropy-Oriented Drug Design, Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Miryam Pastor
- Christian Doppler Laboratory for Entropy-Oriented Drug Design, Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Christiane Kofink
- Boehringer Ingelheim RCV GmbH & Co KG, Doktor-Boehringer-Gasse 5-11, 1120 Vienna, Austria
| | - Nuno Maulide
- Christian Doppler Laboratory for Entropy-Oriented Drug Design, Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
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Ito Y, Ueda M, Takeda N, Miyata O. tert-
Butyl Iodide Mediated Reductive Fischer Indolization of Conjugated Hydrazones. Chemistry 2016; 22:2616-9. [DOI: 10.1002/chem.201504010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Indexed: 02/03/2023]
Affiliation(s)
- Yuta Ito
- Kobe Pharmaceutical University; Motoyamakita Higashinada Kobe 658-8558 Japan
| | - Masafumi Ueda
- Kobe Pharmaceutical University; Motoyamakita Higashinada Kobe 658-8558 Japan
| | - Norihiko Takeda
- Kobe Pharmaceutical University; Motoyamakita Higashinada Kobe 658-8558 Japan
| | - Okiko Miyata
- Kobe Pharmaceutical University; Motoyamakita Higashinada Kobe 658-8558 Japan
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R. Suárez-Castillo O, I. Bautista-Hernández C, Sánchez-Zavala M, Meléndez-Rodríguez M, Sierra-Zenteno A, S. Morales-Ríos M, Joseph-Nathan P. Microwave-Assisted Synthesis of 3,1-Benzoxazin-2-ones from 3-Hydroxyoxindoles. HETEROCYCLES 2012. [DOI: 10.3987/com-12-12472] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Kobayashi K, Shikata K, Fujii Y, Fukamachi S, Tanmatsu M, Konishi H. Convenient Synthesis of 1,3-Dihydroisobenzofurans by Hydriodic Acid-Catalyzed Cyclization of 2-Vinylbenzyl Alcohols. HETEROCYCLES 2010. [DOI: 10.3987/com-10-11947] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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