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Zhang HP, Chen W, Hu ZJ, Lyu X, Qiao EJ, Jin WB, Xu WY, Ding XH, Miao CB, Yang HT. Copper-Catalyzed [3 + 2] Annulation of O-Acyl Oximes with p-Hydroquinones for the Synthesis of 5-Hydroxyindoles. J Org Chem 2024; 89:14968-14980. [PMID: 39364928 DOI: 10.1021/acs.joc.4c01722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2024]
Abstract
A copper-catalyzed [3 + 2] annulation of O-acyl oximes with 2-electron-withdrawing group substituted p-hydroquinones for the efficient synthesis of polysubstituted 5-hydroxyindoles is developed. Further intramolecular cyclization leads to the concise and rapid construction of several kinds of 3,4- and 4,5-fused polycyclic indoles.
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Affiliation(s)
- Hui-Peng Zhang
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Wei Chen
- Changzhou Siyao Pharmaceuticals Co., Ltd., Changzhou, Jiangsu 213018, China
| | - Zi-Jun Hu
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Xinyu Lyu
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu 213164, China
| | - En-Jun Qiao
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Wan-Bo Jin
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Wen-Ya Xu
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Xian-Heng Ding
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Chun-Bao Miao
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Hai-Tao Yang
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu 213164, China
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Hu ZJ, Chen W, Lyu X, Zhang HP, Chen SW, Ding XH, Yu CH, Cui Z, Miao CB, Yang HT. Copper-Catalyzed [3 + 2] Annulation of O-Acyl Oximes with 4-Sulfonamidophenols for the Synthesis of 5-Sulfonamidoindoles and 2-Amido-5-sulfonamidobenzofuran-3(2 H)-ones. Org Lett 2024; 26:4229-4234. [PMID: 38738828 DOI: 10.1021/acs.orglett.4c01071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2024]
Abstract
A copper-catalyzed [3 + 2] annulation of O-acyl oximes with 4-sulfonamidophenols is developed. The advantage of this method lies in the concurrent double activation of two substrates to form nucleophilic enamines and electrophilic quinone monoimines. The substituent on the α-carbon of O-acyl oxime determines two different reaction pathways, thereby leading to the selective generation of 5-sulfonamidoindoles and 2-amido-5-sulfonamidobenzofuran-3(2H)-ones.
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Affiliation(s)
- Zi-Jun Hu
- School of Petrochemical Engineering, Changzhou University, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou, Jiangsu 213164, P. R. China
| | - Wei Chen
- Changzhou Siyao Pharmaceuticals Co., Ltd., Changzhou, Jiangsu 213018, P. R. China
| | - Xinyu Lyu
- School of Petrochemical Engineering, Changzhou University, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou, Jiangsu 213164, P. R. China
| | - Hui-Peng Zhang
- School of Petrochemical Engineering, Changzhou University, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou, Jiangsu 213164, P. R. China
| | - Si-Wei Chen
- School of Petrochemical Engineering, Changzhou University, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou, Jiangsu 213164, P. R. China
| | - Xian-Heng Ding
- School of Petrochemical Engineering, Changzhou University, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou, Jiangsu 213164, P. R. China
| | - Cang-Hai Yu
- School of Petrochemical Engineering, Changzhou University, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou, Jiangsu 213164, P. R. China
| | - Zhen Cui
- School of Petrochemical Engineering, Changzhou University, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou, Jiangsu 213164, P. R. China
| | - Chun-Bao Miao
- School of Petrochemical Engineering, Changzhou University, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou, Jiangsu 213164, P. R. China
| | - Hai-Tao Yang
- School of Petrochemical Engineering, Changzhou University, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou, Jiangsu 213164, P. R. China
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Li Y, Huang Y, Li Z, Sun J. Recent Advances in Regioselective C-H Bond Functionalization of Free Phenols. Molecules 2023; 28:molecules28083397. [PMID: 37110630 PMCID: PMC10143084 DOI: 10.3390/molecules28083397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/08/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
Phenols are important readily available synthetic building blocks and starting materials for organic synthetic transformations, which are widely found in agrochemicals, pharmaceuticals, and functional materials. The C-H functionalization of free phenols has proven to be an extremely useful tool in organic synthesis, which provides efficient increases in phenol molecular complexity. Therefore, approaches to functionalizing existing C-H bonds of free phenols have continuously attracted the attention of organic chemists. In this review, we summarize the current knowledge and recent advances in ortho-, meta-, and para-selective C-H functionalization of free phenols in the last five years.
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Affiliation(s)
- Yanan Li
- School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China
| | - Yekai Huang
- School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China
| | - Zhi Li
- School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China
| | - Jianan Sun
- School of Biomedical Engineering, Anhui Medical University, Hefei 230032, China
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M. Honnanayakanavar J, Owk O, Suresh S. Recent Advances in the Tandem Copper-Catalyzed Ullmann-Goldberg N-Arylation–Cyclization Strategies. Org Biomol Chem 2022; 20:2993-3028. [DOI: 10.1039/d2ob00082b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N‒Aryl bond formation under copper catalysis has been playing a pivotal role and has been extensively used as a key step in the total syntheses of several therapeutic molecules. The...
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