1
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Malik U, Pal D. Isoxazole compounds: Unveiling the synthetic strategy, in-silico SAR & toxicity studies and future perspective as PARP inhibitor in cancer therapy. Eur J Med Chem 2024; 279:116898. [PMID: 39353240 DOI: 10.1016/j.ejmech.2024.116898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2024] [Revised: 09/13/2024] [Accepted: 09/18/2024] [Indexed: 10/04/2024]
Abstract
Latest developments in cancer treatment have shed a light on the crucial role of PARP inhibitors that enhance the treatment effectiveness by modifying abnormal repair pathways. PARP inhibitors, such as Olaparib, Rucaparib, Niraparib, and Talazoparib have been approved in a number of cancers including BRCA 1/BRCA2 associated malignancies although there are many difficulties as therapeutical resistance. Besides the conventional synthetic drugs, natural compounds such as flavones and flavonoids have been found to be PARP inhibitors but only in preclinical studies. Isoxazole is very important class of potential candidates for medicinal chemistry with anti-cancer and other pharmacological activities. At present, there are no approved PARP inhibitors of isoxazole origin but their ability to hit many pathways inside the cancer cells points out on its importance for future treatments design. In drug development, isoxazoles are helpful because of the molecular design flexibility that may be enhanced using various synthetic approaches. This review highlights the molecular mechanisms of PARP inhibition, importance of isoxazole compounds and present advances in their synthetic strategies that demonstrate promise for these agents as new anticancer drugs. It emphasizes that isoxazole-based PARP inhibitors compounds could be novel anti-cancer drugs. Through this review, we hope to grow a curiosity in additional explorations of isoxazole-based PARP inhibitors and their applications in the trends of novel insights towards precision cancer therapy.
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Affiliation(s)
- Udita Malik
- Department of Pharmacy, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, C.G., 495009, India
| | - Dilipkumar Pal
- Department of Pharmacy, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, C.G., 495009, India.
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2
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Kotipalli R, Nanubolu JB, Reddy MS. Pd-Catalyzed Chelation-Assisted Regioselective and Site Selective Cyclative C-H Annulation of Alkynyl Oximes with Activated Alkynes. J Org Chem 2024; 89:3834-3843. [PMID: 38421425 DOI: 10.1021/acs.joc.3c02665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Electrophilic cyclization and concomitant C-H annulation constitute an expedient cascade strategy for the construction of multicyclic scaffolds with precise substitutional patterns. We report here a novel Pd-catalyzed cyclative annulation of ynone oxime with activated alkynes. The cascade features a dual regioselectivity including site selective C-H activation and chelation-assisted selective insertion of alkynes. Control experiments together with kinetic experiments give insights into the mechanism.
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Affiliation(s)
- Ramesh Kotipalli
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | | | - Maddi Sridhar Reddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India
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3
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Suresh V, Mahipal Reddy T, Dattatri, Sridhar Reddy M. Pd-Catalyzed Sequential Electrophilic Cyclization/Selective C-H Annulation Cascade: Synthesis of Isoxazole-Phthalimide-Fused Poly-Heterocyclics. J Org Chem 2024; 89:3214-3225. [PMID: 38381896 DOI: 10.1021/acs.joc.3c02680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Harnessing the organo-palladium intermediates generated from electrophilic cyclizations for tandem C-C bond construction is a challenging task but constitutes an excellent tool for constructing complex motifs from simpler substrates. We realize herein such a cyclative annulation of alkynyl-oxime ethers with maleimides for the facile construction of isoxazole-phthalimide hybrid motifs through Pd(II) catalysis. This protocol features excellent regio-selectivity in C-H selection, a broad substrate scope, good functional group tolerance, and scalability. Necessary KIE & labeling studies give insight into the reaction mechanism.
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Affiliation(s)
- Vavilapalli Suresh
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - T Mahipal Reddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Dattatri
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Maddi Sridhar Reddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research, Ghaziabad 201002, India
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4
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Li J, Hong C, Niu Y, Wang B, Jiang H. Palladium-Catalyzed Cyclization/Alkenylation of Ynone Oximes with Vinylsilanes for the Assembly of Isoxazolyl Vinylsilanes. Chem Asian J 2024:e202301122. [PMID: 38224122 DOI: 10.1002/asia.202301122] [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: 12/18/2023] [Revised: 01/13/2024] [Accepted: 01/15/2024] [Indexed: 01/16/2024]
Abstract
A palladium-catalyzed cascade cyclization/alkenylation for the assembly of synthetically valuable isoxazolyl vinylsilane derivative has been accomplished. Easily accessible ynone oximes, and available vinylsilane agents were used as the reaction starting materials This protocol features broad substrate scope, good functional group tolerance, and good step- and atom-economy. Remarkably, this approach provides a new approach for the construction of structurally diverse isoxazolyl-containing vinylsilanes with high molecular complexity, showing a promising application in synthetic and pharmaceutical chemistry.
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Affiliation(s)
- Jianxiao Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, P. R China
- Guangdong Province Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region, Shaoguan University, 512005, Shaoguan, P. R. China
| | - Chenjing Hong
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, P. R China
| | - Yanan Niu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, P. R China
| | - Bowen Wang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, P. R China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, P. R China
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5
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Li J, Hong C, Niu Y, Wang B, Xiong W, Jiang H. Synthesis of gem-Difluorinated Isoxazoles via Palladium-Catalyzed Oxylallylation of Alkynone Oxime Ethers. Chem Asian J 2023; 18:e202300579. [PMID: 37494305 DOI: 10.1002/asia.202300579] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 07/25/2023] [Accepted: 07/26/2023] [Indexed: 07/28/2023]
Abstract
A novel and reliable palladium-catalyzed oxylallylation of alkynone oxime ethers with fluorine-containing alkenes was accomplished. Using the bulk industrial chemical 3-bromo-3,3-difluoroprop-1-ene as the coupling partner, this synthetic methodology offers the first example for the assembly of structurally diverse gem-difluorinated isoxazole derivatives in moderate to good yields with high atom- and step-economy and excellent functional group compatibility. More importantly, this strategy allows for the direct combination of the isoxazole motifs and gem-difluoroalkene unit, which is not easy to obtain through a general synthetic strategy.
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Affiliation(s)
- Jianxiao Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R China
| | - Chenjing Hong
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R China
| | - Yanan Niu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R China
| | - Bowen Wang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R China
| | - Wenfang Xiong
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R China
- School of Pharmacy, Guangdong Medical University, Dongguan, P. R. China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R China
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6
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Lai YL, Yan SX, Zhang SL, Huang YH, Hu RX, Chen YC, Luo JM, Li J. Palladium-Catalyzed Cascade Cyclization/Alkylation of Oxime Ethers: Assembly of 4-Alkylisoxazoles by "Chain-Walking" Strategy. Chem Asian J 2022; 17:e202200806. [PMID: 36000512 DOI: 10.1002/asia.202200806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/23/2022] [Indexed: 11/08/2022]
Abstract
A reliable and efficient palladium-catalyzed cascade cyclization/alkylation of oxime ethers with unactivated alkenes is described, affording a whole variety of structurally diverse isoxazole derivatives in moderate to good yields with excellent functional group compatibility. Ionic liquid [Aeim]Br not only acts as an environmentally friendly solvent but also acts as an accelerating agent to provide excess bromine source to eliminate bromomethane from oxime ethers. More importantly, the use of "chain-walking" strategy provides a novel methodology in organic synthesis to rapid generation of molecular complexity from readily available starting materials.
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Affiliation(s)
- Yin-Long Lai
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Shao-Xi Yan
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Sheng-Ling Zhang
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Yu-Hong Huang
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Ru-Xin Hu
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Yang-Chong Chen
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Jian-Min Luo
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Jianxiao Li
- South China University of Technology, School of Chemistry and Chemical Engineering, wushan road, 510640, Guangzhou, CHINA
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7
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Duan M, Hou G, Zhao Y, Zhu C, Song C. Synthesis of Isoxazoles via One-Pot Oxidation/Cyclization Sequence from Propargylamines. J Org Chem 2022; 87:11222-11225. [PMID: 35912706 DOI: 10.1021/acs.joc.2c00896] [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
A facile strategy for the synthesis of isoxazoles has been efficaciously developed, which involves oxidation of propargylamines to the corresponding oximes followed by CuCl-mediated intramolecular cyclization of the latter. This protocol shows a straightforward way to construct a series of isoxazole cores with a wide range of functional group compatibility. Meanwhile, a gram-scale experiment and synthetic applications can be successfully operated.
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Affiliation(s)
- Mengyan Duan
- College of Chemistry, and Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, China
| | - Guodong Hou
- College of Chemistry, and Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, China
| | - Yabiao Zhao
- College of Chemistry, and Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, China
| | - Congjun Zhu
- School of Chemistry & Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Chuanjun Song
- College of Chemistry, and Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, China
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8
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Li J, Cen L, He D, Zhou D, Huang S. Palladium‐Catalyzed Cascade Desulfitative Arylation of Acetylinic Oximes with Sodium Arylsulfinates. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jianxiao Li
- South China University of Technology School of Chemistry and Chemical Engineering wushan road 510640 Guangzhou CHINA
| | - Liying Cen
- South China University of Technology School of Chemistry and Chemical Engineering CHINA
| | - Dan He
- South China University of Technology School of Chemistry and Chemical Engineering CHINA
| | - Daohao Zhou
- South China University of Technology School of Chemistry and Chemical Engineering CHINA
| | - Songxuan Huang
- South China University of Technology School of Chemistry and Chemical Engineering CHINA
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9
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Kotipalli R, Nagireddy A, Reddy MS. Palladium-catalyzed cyclizative cross coupling of ynone oximes with 2-haloaryl N-acrylamides for isoxazolyl indoline bis-heterocycles. Org Biomol Chem 2022; 20:2609-2614. [PMID: 35298580 DOI: 10.1039/d2ob00065b] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal-catalyzed cyclizative cross-coupling reactions have attracted enormous attention due to their unique cascade nature. We demonstrated, herein, a dual-cyclizative coupling of ynone oxime ethers with acrylamides for the synthesis of methylene-linked isoxazolyl 2-oxindoles. The cascade was triggered by a palladium(II)-catalyzed ynone oxime ether cyclization, which underwent a Heck-type coupling intercepted by an aryl iodide insertion. Control experiments were carried out to understand the mechanism.
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Affiliation(s)
- Ramesh Kotipalli
- Department of OSPC, CSIR-Indian Institute of Chemical Technology, Habsiguda, Hyderabad 500007, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India.
| | - Attunuri Nagireddy
- Department of OSPC, CSIR-Indian Institute of Chemical Technology, Habsiguda, Hyderabad 500007, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India.
| | - Maddi Sridhar Reddy
- Department of OSPC, CSIR-Indian Institute of Chemical Technology, Habsiguda, Hyderabad 500007, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India.
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10
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M PH, Al-Ostoot FH, Vivek HK, Khanum SA. Synthesis, characterization, DFT, docking studies and molecular dynamics of some 3-phenyl-5-furan isoxazole derivatives as anti-inflammatory and anti-ulcer agents. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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11
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Yu Z, Zhang D, Li X, Zhang B, Yang Z, Qian Y, Du Y. Synthesis of 4‐Chalcogenylated Isoxazoles Mediated by PhICl
2
and Diorganyl Disulfides/Diselenides. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zhenyang Yu
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency School of Pharmaceutical Science and Technology Tianjin University Tianjin 300072 P. R. China
| | - Dongke Zhang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency School of Pharmaceutical Science and Technology Tianjin University Tianjin 300072 P. R. China
| | - Xiaoxian Li
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency School of Pharmaceutical Science and Technology Tianjin University Tianjin 300072 P. R. China
| | - Beibei Zhang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency School of Pharmaceutical Science and Technology Tianjin University Tianjin 300072 P. R. China
| | - Zhifang Yang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency School of Pharmaceutical Science and Technology Tianjin University Tianjin 300072 P. R. China
| | - Yan Qian
- College of Pharmaceutical Sciences Southwest University Chongqing 400715 P. R. China
| | - Yunfei Du
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency School of Pharmaceutical Science and Technology Tianjin University Tianjin 300072 P. R. China
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12
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13
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Li L, Huang S, Mao K, Lv L, Li Z. Synthesis of isoxazoles via cyclization of β-fluoro enones with sodium azide. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153052] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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14
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Zheng Z, Ma X, Cheng X, Zhao K, Gutman K, Li T, Zhang L. Homogeneous Gold-Catalyzed Oxidation Reactions. Chem Rev 2021; 121:8979-9038. [DOI: 10.1021/acs.chemrev.0c00774] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Zhitong Zheng
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Xu Ma
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Xinpeng Cheng
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Ke Zhao
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Kaylaa Gutman
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Tianyou Li
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Liming Zhang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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15
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Wang L, Tao Y, Zhang N, Li S. Convenient synthesis of 4,5-unsubstituted 3-aroylisoxazoles from methyl aryl ketones and (vinylsulfonyl)benzene in water. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152739] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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16
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17
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Wang X, Lei J, Liu Y, Ye Y, Li J, Sun K. Fluorination and fluoroalkylation of alkenes/alkynes to construct fluoro-containing heterocycles. Org Chem Front 2021. [DOI: 10.1039/d0qo01629b] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This review summarize the established strategies through fluorination and fluoroalkylation of alkenes/alkynes for constructing fluoro-containing heterocycles. Reaction scopes, mechanisms and some shortcomings are also discussed.
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Affiliation(s)
- Xin Wang
- School of Chemistry and Chemical Engineering
- YanTai University
- Yantai
- P. R. China
| | - Jia Lei
- School of Pharmacy
- Harbin University of Commerce
- Harbin
- P. R. China
| | - Yingjie Liu
- School of Pharmacy
- Harbin University of Commerce
- Harbin
- P. R. China
| | - Yong Ye
- College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
| | - Jiazhu Li
- School of Chemistry and Chemical Engineering
- YanTai University
- Yantai
- P. R. China
| | - Kai Sun
- School of Chemistry and Chemical Engineering
- YanTai University
- Yantai
- P. R. China
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18
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Campeau D, León Rayo DF, Mansour A, Muratov K, Gagosz F. Gold-Catalyzed Reactions of Specially Activated Alkynes, Allenes, and Alkenes. Chem Rev 2020; 121:8756-8867. [DOI: 10.1021/acs.chemrev.0c00788] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Dominic Campeau
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - David F. León Rayo
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Ali Mansour
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Karim Muratov
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Fabien Gagosz
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
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19
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Ge J, Ding Q, Long X, Liu X, Peng Y. Copper(II)-Catalyzed Domino Synthesis of 4-Benzenesulfonyl Isoxazoles from 2-Nitro-1,3-enynes, Amines, and Sodium Benzenesulfinate. J Org Chem 2020; 85:13886-13894. [PMID: 33084339 DOI: 10.1021/acs.joc.0c01964] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A simple and effective method for the synthesis of fully substituted 4-benzenesulfonyl isoxazoles through a copper(II)-catalyzed three-component reaction of 2-nitro-1,3-enynes, amines, and sodium benzenesulfinate is described. The reaction proceeds smoothly under mild conditions and provides the benzenesulfonyl isoxazoles with high chemoselectivity.
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Affiliation(s)
- Junying Ge
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Key Laboratory of Green Chemistry, and College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China.,Institute of Coordination Catalysis, Engineering Center of Jiangxi, University for Lithium Energy and Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology, Yichun University, Yichun, Jiangxi 336000, China
| | - Qiuping Ding
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Key Laboratory of Green Chemistry, and College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Xujing Long
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Key Laboratory of Green Chemistry, and College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Xuan Liu
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Key Laboratory of Green Chemistry, and College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Yiyuan Peng
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Key Laboratory of Green Chemistry, and College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
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20
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Takahashi S, Umakoshi Y, Nakayama K, Okada Y, Zhdankin VV, Yoshimura A, Saito A. Fluorocyclization of
N
‐Propargyl Carboxamides by λ
3
‐Iodane Catalysts with Coordinating Substituents. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000381] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shunsuke Takahashi
- Division of Applied Chemistry, Institute of EngineeringTokyo University of Agriculture and Technology, Koganei Tokyo 184-8588 Japan
| | - Yuki Umakoshi
- Division of Applied Chemistry, Institute of EngineeringTokyo University of Agriculture and Technology, Koganei Tokyo 184-8588 Japan
| | - Kaii Nakayama
- Division of Applied Chemistry, Institute of EngineeringTokyo University of Agriculture and Technology, Koganei Tokyo 184-8588 Japan
| | - Yohei Okada
- Division of Applied Chemistry, Institute of EngineeringTokyo University of Agriculture and Technology, Koganei Tokyo 184-8588 Japan
| | - Viktor V. Zhdankin
- Department of Chemistry and BiochemistryUniversity of Minnesota Duluth MN 55812 USA
| | - Akira Yoshimura
- Department of Chemistry and BiochemistryUniversity of Minnesota Duluth MN 55812 USA
| | - Akio Saito
- Division of Applied Chemistry, Institute of EngineeringTokyo University of Agriculture and Technology, Koganei Tokyo 184-8588 Japan
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21
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Li J, Lin Z, Wu W, Jiang H. Recent advances in metal catalyzed or mediated cyclization/functionalization of alkynes to construct isoxazoles. Org Chem Front 2020. [DOI: 10.1039/d0qo00609b] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review summarized the recent developments in metal catalyzed or mediated cyclization/functionalization of alkynes to construct isoxazoles.
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Affiliation(s)
- Jianxiao Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Zidong Lin
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
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22
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Ueda M, Yasui M, Takeda N. Synthesis of Heterocycles Utilizing N-Alkoxyimines and Amides. HETEROCYCLES 2020. [DOI: 10.3987/rev-19-918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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23
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Bondarenko OB, Komarov AI, Karetnikov GL, Nikolaeva SN, Zyk NV, Holt T, Kutateladze AG. Diastereoselective heterocyclization of geminal bromo-fluoro arylcyclopropanes by nitrosonium tetrafluoroborate: Access to 4-fluorinated isoxazolines and isoxazoles. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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24
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Li C, Li J, Zhou F, Li C, Wu W. Palladium-Catalyzed Cascade Annulation/Allylation of Alkynyl Oxime Ethers with Allyl Halides: Rapid Access to Fully Substituted Isoxazoles. J Org Chem 2019; 84:11958-11970. [PMID: 31464128 DOI: 10.1021/acs.joc.9b01593] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
A novel and efficient approach for the synthesis of functionalized isoxazoles via palladium-catalyzed cascade annulation/allylation of alkynyl oxime ethers with allyl halides has been established. The present protocol exhibits mild reaction conditions, good functional group compatibility, and convenient operation. Moreover, scalability was performed and further decoration of the isoxazole product was achieved.
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25
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Gao WC, Cheng YF, Chang HH, Li X, Wei WL, Yang P. Synthesis of 4-Sulfenyl Isoxazoles through AlCl3-Mediated Electrophilic Cyclization and Sulfenylation of 2-Alkyn-1-one O-Methyloximes. J Org Chem 2019; 84:4312-4317. [DOI: 10.1021/acs.joc.9b00256] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Wen-Chao Gao
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Yu-Fei Cheng
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Hong-Hong Chang
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Xing Li
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Wen-Long Wei
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Peng Yang
- College of Chemistry, Chemical Engineering and Material Science, Shandong Normal University, Jinan 250014, P. R. China
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26
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An Efficient Selectfluor-Mediated Oxidative Thio- and Selenocyanation of Diversely Substituted Indoles and Carbazoles. HETEROATOM CHEMISTRY 2019. [DOI: 10.1155/2019/1459681] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A facile Selectfluor-mediated oxidative method for direct introduction of SCN and SeCN groups into diversely substituted indoles and carbazoles is described, by employing readily available thiocyanate and selenocyanate salts, and the scope of the method is underscored by providing 24 examples. The feasibility to sequentially introduce SCN followed by SeCN on a carbazole framework and to synthesize the corresponding S-tetrazole and Se-tetrazole derivatives is also demonstrated.
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27
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Sato K, Sandford G, Konishi Y, Yanada N, Toda C, Tarui A, Omote M. Lewis acid promoted fluorine-alkoxy group exchange reactions for the synthesis of 5-alkoxy-4,4-difluoroisoxazoline systems. Org Biomol Chem 2019; 17:2818-2823. [DOI: 10.1039/c9ob00097f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lewis acid promoted substitution of fluorine yields novel 5-alkoxylated 4,4-difluoroisoxazolines via SN1 type processes.
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Affiliation(s)
- Kazuyuki Sato
- Faculty of Pharmaceutical Sciences
- Setsunan University
- Hirakata, Osaka 573-0101
- Japan
| | | | - Yukiko Konishi
- Faculty of Pharmaceutical Sciences
- Setsunan University
- Hirakata, Osaka 573-0101
- Japan
| | - Niko Yanada
- Faculty of Pharmaceutical Sciences
- Setsunan University
- Hirakata, Osaka 573-0101
- Japan
| | - Chisako Toda
- Faculty of Pharmaceutical Sciences
- Setsunan University
- Hirakata, Osaka 573-0101
- Japan
| | - Atsushi Tarui
- Faculty of Pharmaceutical Sciences
- Setsunan University
- Hirakata, Osaka 573-0101
- Japan
| | - Masaaki Omote
- Faculty of Pharmaceutical Sciences
- Setsunan University
- Hirakata, Osaka 573-0101
- Japan
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28
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Marcote DC, Varela I, Fernández-Casado J, Mascareñas JL, López F. Gold(I)-Catalyzed Enantioselective Annulations between Allenes and Alkene-Tethered Oxime Ethers: A Straight Entry to Highly Substituted Piperidines and aza-Bridged Medium-Sized Carbocycles. J Am Chem Soc 2018; 140:16821-16833. [DOI: 10.1021/jacs.8b10388] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- David C. Marcote
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidad de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Iván Varela
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidad de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Jaime Fernández-Casado
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidad de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - José L. Mascareñas
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidad de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Fernando López
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidad de Santiago de Compostela, 15782, Santiago de Compostela, Spain
- Instituto de Química Orgánica General CSIC, Juan de la Cierva 3, 28006, Madrid, Spain
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29
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Liu X, Hong D, She Z, Hersh WH, Yoo B, Chen Y. Complementary regioselective synthesis of 3,5-disubstituted isoxazoles from ynones. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.09.043] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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30
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Arcadi A, Chiarini M, Del Vecchio L, Marinelli F. 5-Exo-dig aminocylization/hydroxyfluorination of propargylic carbamates. J Fluor Chem 2018. [DOI: 10.1016/j.jfluchem.2018.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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31
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Palladium‐Catalyzed Cascade Cyclization/Alkynylation and Alkenylation of Alkynone
O
‐Methyloximes with Terminal Alkynes. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800444] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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32
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Zhang Y, Chen W, Jia X. A novel synthesis of 5-substituted isoxazoles from propargylic amines and N -hydroxyphthalimide. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.04.062] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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33
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Agrawal N, Mishra P. The synthetic and therapeutic expedition of isoxazole and its analogs. Med Chem Res 2018; 27:1309-1344. [PMID: 32214770 PMCID: PMC7079875 DOI: 10.1007/s00044-018-2152-6] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 02/01/2018] [Indexed: 11/28/2022]
Abstract
Isoxazole, constituting an important family of five-membered heterocycles with one oxygen atom and one nitrogen atom at adjacent positions is of immense importance because of its wide spectrum of biological activities and therapeutic potential. It is, therefore, of prime importance that the development of new synthetic strategies and designing of new isoxazole derivatives should be based on the most recent knowledge emerging from the latest research. This review is an endeavor to highlight the progress in the chemistry and biological activity of isoxazole derivatives which could provide a low-height flying bird's eye view of isoxazole derivatives to the medicinal chemists for the development of clinically viable drugs using this information.
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Affiliation(s)
- Neetu Agrawal
- Institute of Pharmaceutical Research, GLA University, Mathura, U.P. India
| | - Pradeep Mishra
- Institute of Pharmaceutical Research, GLA University, Mathura, U.P. India
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34
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Zeng Q, Zhang L, Xiao Y, Zhang J. Divergent access to N-hydroxypyrroles and isoxazoles via the gold(i)- or Brønsted acid-catalysed regioselective cyclization of N-(2-trifluoromethyl-3-alkynyl) oximes. Org Biomol Chem 2018; 16:1375-1380. [PMID: 29411001 DOI: 10.1039/c7ob03107f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The divergent regioselective cyclization of N-(2-trifluoromethyl-3-alkynyl) oximes by a suitable choice of a gold(i) or a Brønsted acid catalyst, leading to 4-trifluoromethyl-N-hydroxypyrroles or 4-trifluoromethyl-5-alkylisoxazoles was developed. In order to avoid the tedious separation of unstable N-(2-trifluoromethyl-3-alkynyl) oximes, an easy two-step, one-pot synthesis of 4-trifluoromethyl-5-alkylisoxazoles was realized via the sequential oxidation of the corresponding hydroxylamines and subsequent treatment with the reductant, sodium thiosulfate (Na2S2O3). This two-step, one-pot procedure is a complementary method for the synthesis of 4-trifluoromethyl-5-alkylisoxazole from those unstable N-(2-trifluoromethyl-3-alkynyl) oximes.
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Affiliation(s)
- Qin Zeng
- Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, 500. Dongchuan Road, Shanghai, 200062, P. R. China.
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35
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Vitale P, Scilimati A. Recent Developments in the Chemistry of 3-Arylisoxazoles and 3-Aryl-2-isoxazolines. ADVANCES IN HETEROCYCLIC CHEMISTRY 2017. [DOI: 10.1016/bs.aihch.2016.10.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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36
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Meena DR, Maiti B, Chanda K. Cu(I) catalyzed microwave assisted telescopic synthesis of 3,5-disubstituted isoxazoles in green media. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.10.109] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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37
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Tarigopula C, Thota GK, Balamurugan R. Efficient Synthesis of Functionalized β-Keto Esters and β-Diketones through Regioselective Hydration of Alkynyl Esters and Alkynyl Ketones by Use of a Cationic NHC-AuICatalyst. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
| | - Ganesh Kumar Thota
- School of Chemistry; University of Hyderabad; Gachibowli 500046 Hyderabad INDIA
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38
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Catalytic Cycloisomerization-Fluorination Sequence ofN-Propargyl Amides by Iodoarene/HF⋅Pyridine/Selectfluor Systems. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600383] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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39
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Affiliation(s)
- Elena Buñuel
- Departamento de Química Orgánica; Facultad de Ciencias; Universidad Autónoma de Madrid; Av. Francisco Tomás y Valiente 7, Cantoblanco 28049 Madrid Spain
| | - Diego J. Cárdenas
- Departamento de Química Orgánica; Facultad de Ciencias; Universidad Autónoma de Madrid; Av. Francisco Tomás y Valiente 7, Cantoblanco 28049 Madrid Spain
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40
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Wang Q, Jiang Y, Sun R, Tang XY, Shi M. Gold-Catalyzed Fluorination-Hydration: Synthesis of α-Fluorobenzofuranones from 2-Alkynylphenol Derivatives. Chemistry 2016; 22:14739-45. [DOI: 10.1002/chem.201602545] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Qiang Wang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
| | - Yu Jiang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
| | - Run Sun
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
| | - Xiang-Ying Tang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry (SIOC); Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry (SIOC); Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
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41
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Pusch S, Kowalczyk D, Opatz T. A Photoinduced Cobalt-Catalyzed Synthesis of Pyrroles through in Situ-Generated Acylazirines. J Org Chem 2016; 81:4170-8. [DOI: 10.1021/acs.joc.6b00511] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefan Pusch
- Institute
of Organic Chemistry, Johannes Gutenberg University, Duesbergweg
10-14, 55128 Mainz, Germany
| | - Danuta Kowalczyk
- Institute
of Organic Chemistry, Johannes Gutenberg University, Duesbergweg
10-14, 55128 Mainz, Germany
| | - Till Opatz
- Institute
of Organic Chemistry, Johannes Gutenberg University, Duesbergweg
10-14, 55128 Mainz, Germany
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42
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Gao YN, Shi FC, Xu Q, Shi M. Enantioselective Synthesis of Isoquinolines: Merging Chiral-Phosphine and Gold Catalysis. Chemistry 2016; 22:6803-7. [DOI: 10.1002/chem.201601129] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Yu-Ning Gao
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 P. R. China
| | - Feng-Chen Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 P. R. China
| | - Qin Xu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 P. R. China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 P. R. China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
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43
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Sato K, Sandford G, Shimizu K, Akiyama S, Lancashire MJ, Yufit DS, Tarui A, Omote M, Kumadaki I, Harusawa S, Ando A. Synthesis of fluorinated isoxazoles using Selectfluor™: preparation and characterization of 4-fluoroisoxazole, 4,4,5-trifluoroisoxazoline and 4,4-difluoro-5-hydroxyisoxazoline systems from one-pot and multi-step processes. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.02.026] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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44
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Tu KN, Hirner JJ, Blum SA. Oxyboration with and without a Catalyst: Borylated Isoxazoles via B-O σ-Bond Addition. Org Lett 2016; 18:480-3. [PMID: 26771389 PMCID: PMC4763986 DOI: 10.1021/acs.orglett.5b03530] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Herein
we report an oxyboration reaction with activated substrates
that employs B–O σ bond additions to C–C π
bonds to form borylated isoxazoles, which are potential building blocks
for drug discovery. Although this reaction can be effectively catalyzed
by gold, it is the first example of uncatalyzed oxyboration of C–C
π bonds by B–O σ bonds—and only the second
example that is catalyzed. This oxyboration reaction is tolerant of
groups incompatible with alternative lithiation/borylation and palladium-catalyzed
C–H activation/borylation technologies for the synthesis of
borylated isoxazoles.
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Affiliation(s)
- Kim N Tu
- Department of Chemistry, University of California-Irvine , Irvine, California 92697-2025, United States
| | - Joshua J Hirner
- Department of Chemistry, University of California-Irvine , Irvine, California 92697-2025, United States
| | - Suzanne A Blum
- Department of Chemistry, University of California-Irvine , Irvine, California 92697-2025, United States
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45
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Shu C, Li L, Shen CH, Ruan PP, Liu CY, Ye LW. Gold-Catalyzed Tandem Cycloisomerization-Halogenation of Chiral Homopropargyl Sulfonamides. Chemistry 2016; 22:2282-90. [DOI: 10.1002/chem.201503891] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Indexed: 12/28/2022]
Affiliation(s)
- Chao Shu
- State Key Laboratory of Physical Chemistry of Solid Surfaces and The Key Laboratory for Chemical Biology of Fujian Province; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 Fujian P. R. China
| | - Long Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces and The Key Laboratory for Chemical Biology of Fujian Province; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 Fujian P. R. China
| | - Cang-Hai Shen
- State Key Laboratory of Physical Chemistry of Solid Surfaces and The Key Laboratory for Chemical Biology of Fujian Province; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 Fujian P. R. China
| | - Peng-Peng Ruan
- State Key Laboratory of Physical Chemistry of Solid Surfaces and The Key Laboratory for Chemical Biology of Fujian Province; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 Fujian P. R. China
| | - Chao-Yue Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces and The Key Laboratory for Chemical Biology of Fujian Province; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 Fujian P. R. China
| | - Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces and The Key Laboratory for Chemical Biology of Fujian Province; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 Fujian P. R. China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; Shanghai 200032 P. R. China
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46
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Lempke L, Sak H, Kubicki M, Krause N. Gold-catalyzed cycloisomerization of trifluoromethylated allenols: sustainability and mechanistic studies. Org Chem Front 2016. [DOI: 10.1039/c6qo00423g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Trifluoromethyl-substituted α-allenols are cyclized to the corresponding 2,5-dihydrofurans in the presence of neutral or cationic gold catalysts.
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Affiliation(s)
- Linda Lempke
- Dortmund University of Technology
- Organic Chemistry
- D-44227 Dortmund
- Germany
| | - Hülya Sak
- Dortmund University of Technology
- Organic Chemistry
- D-44227 Dortmund
- Germany
| | - Michael Kubicki
- Dortmund University of Technology
- Organic Chemistry
- D-44227 Dortmund
- Germany
| | - Norbert Krause
- Dortmund University of Technology
- Organic Chemistry
- D-44227 Dortmund
- Germany
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47
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He Y, Xie YY, Wang YC, Bin XM, Hu DC, Wang HS, Pan YM. TEMPO-catalyzed synthesis of 5-substituted isoxazoles from propargylic ketones and TMSN3. RSC Adv 2016. [DOI: 10.1039/c6ra11099a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel and efficient TEMPO-catalyzed synthesis of 5-substituted isoxazoles from propargylic ketones and TMSN3via the radical mechanism process is described. A plausible reaction mechanism for this process is proposed.
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Affiliation(s)
- Yan He
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
- Guilin 541004
- People's Republic of China
| | - Yu-yang Xie
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
- Guilin 541004
- People's Republic of China
| | - Ying-chun Wang
- College of Chemistry and Chemical Engineering
- Jishou University
- Jishou 416000
- People's Republic of China
| | - Xiao-min Bin
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
- Guilin 541004
- People's Republic of China
| | - Da-chao Hu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
- Guilin 541004
- People's Republic of China
| | - Heng-shan Wang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
- Guilin 541004
- People's Republic of China
| | - Ying-ming Pan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
- Guilin 541004
- People's Republic of China
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48
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Kumar GR, Kumar YK, Reddy MS. A direct access to isoxazoles from ynones using trimethylsilyl azide as amino surrogate under metal/catalyst free conditions. Chem Commun (Camb) 2016; 52:6589-92. [DOI: 10.1039/c6cc02047j] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A general access to isoxazoles with outstanding functional group compatibility from the readily available ynones using trimethylsilyl azide as an amino surrogate under exceptionally simple conditions is described.
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Affiliation(s)
- Gadi Ranjith Kumar
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
- Academy of Scientific and Innovative Research
| | - Yalla Kiran Kumar
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
| | - Maddi Sridhar Reddy
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
- Academy of Scientific and Innovative Research
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49
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Kaewsri W, Thongsornkleeb C, Tummatorn J, Ruchirawat S. Isomerizable (E/Z)-alkynyl-O-methyl oximes employing TMSCl–NCS in chlorinative cyclization for the direct synthesis of 4-chloroisoxazoles. RSC Adv 2016. [DOI: 10.1039/c6ra09396e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
For the first time, 4-chloroisoxazoles are directly synthesized in moderate to excellent yields from mixtures of (E)- and (Z)-alkynyl-O-methyl oximes via (E)- to (Z)-oxime isomerization followed by chlorinative cyclization.
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Affiliation(s)
- Wilailak Kaewsri
- Program on Chemical Biology
- Chulabhorn Graduate Institute
- Center of Excellence on Environmental Health and Toxicology (EHT)
- Ministry of Education
- Bangkok 10210
| | - Charnsak Thongsornkleeb
- Laboratory of Organic Synthesis
- Chulabhorn Research Institute
- Bangkok 10210
- Thailand
- Program on Chemical Biology
| | - Jumreang Tummatorn
- Laboratory of Medicinal Chemistry
- Chulabhorn Research Institute
- Bangkok 10210
- Thailand
- Program on Chemical Biology
| | - Somsak Ruchirawat
- Laboratory of Medicinal Chemistry
- Chulabhorn Research Institute
- Bangkok 10210
- Thailand
- Program on Chemical Biology
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Querard P, Girard SA, Uhlig N, Li CJ. Gold-catalyzed tandem reactions of amide-aldehyde-alkyne coupling and cyclization-synthesis of 2,4,5-trisubstituted oxazoles. Chem Sci 2015; 6:7332-7335. [PMID: 29861964 PMCID: PMC5950834 DOI: 10.1039/c5sc02933c] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Accepted: 10/05/2015] [Indexed: 12/13/2022] Open
Abstract
We report the first cationic gold(i)-catalyzed one-pot reaction of amide, alkyne and aldehyde followed by cyclization, to successfully access highly substituted oxazoles derivatives in good yields. A single catalyst allows the occurring of this multi-step reaction atom- and step-economically, with water as the only theoretical side product.
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Affiliation(s)
- Pierre Querard
- Department of Chemistry , FQRNT Center for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada .
| | - Simon A Girard
- Department of Chemistry , FQRNT Center for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada .
| | - Nick Uhlig
- Department of Chemistry , FQRNT Center for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada .
| | - Chao-Jun Li
- Department of Chemistry , FQRNT Center for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada .
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