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Wen M, Zhang M, Gu F, Geng Y, Liu X, Wu Q, Yang X. Synthesis of spiropyrans via Ru(II)-catalyzed coupling of 3-aryl-2 H-benzo[ b][1,4]oxazines with benzoquinones. Org Biomol Chem 2024; 22:998-1009. [PMID: 38186088 DOI: 10.1039/d3ob01971c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
An efficient Ru(II)-catalyzed C-H activation-based spiroannulation of benzoxazines with the easily available benzoquinone and N-sulfonyl quinone monoimine has been realized, providing a straightforward strategy to access NH-containing spiropyrans in moderate to good yields with good functional group compatibility. The procedure features atom- and step-economy, mild conditions, and excellent chemoselectivity. Moreover, a catalytically competent five-membered cycloruthenated complex has been isolated.
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Affiliation(s)
- Mengke Wen
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
- College of Sciences, Northeastern University, Shenyang, 110819, China
| | - Mengying Zhang
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Fan Gu
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Yuehua Geng
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Xiangyang Liu
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Qingnan Wu
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Xifa Yang
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
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Naveen J, Satyanarayana G. Palladium-Catalyzed [3 + 2] Annulation of ortho-Substituted Iodoarenes with Maleimides via a Consecutive Double Heck-type Strategy. J Org Chem 2023; 88:16229-16247. [PMID: 37965816 DOI: 10.1021/acs.joc.3c01703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Herein, we report an efficient [3 + 2] annulation of ortho-substituted iodoarenes with maleimides via a palladium-catalyzed consecutive double Heck-type strategy, leading to fused tricyclic frameworks of pharmaceutical relevance. The protocol ensued through consecutive inter- and intramolecular Heck couplings effectively. This approach was compatible with a large variety of substrates and functional groups, and it was remarkably tolerated with unprotected maleimide.
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Affiliation(s)
- Jakkula Naveen
- Department of Chemistry, Indian Institute of Technology (IIT) Hyderabad ,Kandi,Sangareddy ,Telangana 502 284, India
| | - Gedu Satyanarayana
- Department of Chemistry, Indian Institute of Technology (IIT) Hyderabad ,Kandi,Sangareddy ,Telangana 502 284, India
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Zhang M, He Y, Li S, Geng Y, Liu X, Yang X. Synthesis of spiropyrans and arylquinones via Ru(II)-catalyzed condition-controlled coupling of 3-aryl-2 H-benzoxazinones with benzoquinones. Chem Commun (Camb) 2023; 59:11704-11707. [PMID: 37700730 DOI: 10.1039/d3cc03395c] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
Ru(II)-catalyzed condition-controlled divergent coupling between 3-aryl-2H-benzoxazin-2-ones and benzoquinones has been realized under operationally simple conditions, affording a series of structurally stable spiropyrans and valuable arylquinones. The potential of this method is also demonstrated by scale-up synthesis and derivatization. Additionally, an unprecedented cycloruthenated complex has been identified as a key intermediate.
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Affiliation(s)
- Mengying Zhang
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Yuhao He
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Song Li
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Yuehua Geng
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Xiangyang Liu
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Xifa Yang
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
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