1
|
Qiu D, Jiang C, Gao P, Yuan Y. Lewis acid-promoted direct synthesis of isoxazole derivatives. Beilstein J Org Chem 2023; 19:1562-1567. [PMID: 37915558 PMCID: PMC10616705 DOI: 10.3762/bjoc.19.113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 09/12/2023] [Indexed: 11/03/2023] Open
Abstract
Isoxazole derivatives were synthesized via a one-pot method utilizing 2-methylquinoline derivatives as template substrates, sodium nitrite as a nitrogen-oxygen source, and solely using aluminum trichloride as the additive. This approach circumvents the need for costly or highly toxic transition metals and presents a novel pathway for the synthesis of isoxazole derivatives.
Collapse
Affiliation(s)
- Dengxu Qiu
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Chenhui Jiang
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Pan Gao
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Yu Yuan
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| |
Collapse
|
2
|
Bhaskaran RP, Nayak KH, Sreelekha MK, Babu BP. Progress in copper-catalysed/mediated intramolecular dehydrogenative coupling. Org Biomol Chem 2023; 21:237-251. [PMID: 36448561 DOI: 10.1039/d2ob01796b] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Transition metal-catalysed C-H functionalization reactions are one of the most efficient synthetic methodologies to construct carbon-carbon and carbon-heteroatom bonds. The initial developments in the field were largely dominated by expensive transition metal catalysts. However, in the past decade, the focus of the catalyst shifted to first-row transition metals and copper catalysis contributed significantly. Abundant, cost-effective, and less toxic copper catalysts are an ideal green alternative to palladium and similar metals. The intramolecular dehydrogenative coupling itself developed as a prominent area of focus as the strategy straightaway affords complex polycyclic scaffolds in one pot. Regioselective activation of inert C-H bonds were made possible with copper catalysts and interestingly, oxygen served as the terminal oxidant in most of the cases. In the present review the focus is on the intramolecular dehydrogenative coupling reactions between carbon-hydrogen and heteroatom-hydrogen bonds to afford carbon-carbon and carbon-hetero atom bonds, catalysed/mediated by copper salts. Though the intermolecular dehydrogenative coupling reactions of copper have already been reviewed more than once, to the best of our knowledge this is the first comprehensive account of copper-based intramolecular dehydrogenative coupling.
Collapse
Affiliation(s)
- Rasmi P Bhaskaran
- Department of Chemistry National Institute of Technology Karnataka Surathkal, Mangalore, India - 575025.
| | - Kalinga H Nayak
- Department of Chemistry National Institute of Technology Karnataka Surathkal, Mangalore, India - 575025.
| | - Mariswamy K Sreelekha
- Department of Chemistry National Institute of Technology Karnataka Surathkal, Mangalore, India - 575025.
| | - Beneesh P Babu
- Department of Chemistry National Institute of Technology Karnataka Surathkal, Mangalore, India - 575025.
| |
Collapse
|
3
|
Hernandez R RA, Burchell-Reyes K, Braga APCA, Lopez JK, Forgione P. Solvent-free synthesis of 3,5-isoxazoles via 1,3-dipolar cycloaddition of terminal alkynes and hydroxyimidoyl chlorides over Cu/Al 2O 3 surface under ball-milling conditions. RSC Adv 2022; 12:6396-6402. [PMID: 35424611 PMCID: PMC8981965 DOI: 10.1039/d1ra08443g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 02/10/2022] [Indexed: 01/20/2023] Open
Abstract
Scalable, solvent-free synthesis of 3,5-isoxazoles under ball-milling conditions has been developed. The proposed methodology allows the synthesis of 3,5-isoxazoles in moderate to excellent yields from terminal alkynes and hydroxyimidoyl chlorides, using a recyclable Cu/Al2O3 nanocomposite catalyst. Furthermore, the proposed conditions are reproducible to a 1.0-gram scale without further milling time variations. A practical and scalable mechanochemical 1,3-dipolar cycloaddition between hydroxyimidoyl chlorides and terminal alkynes catalyzed by Cu/Al2O3 allows a quick access to 3,5-isoxazole derivatives.![]()
Collapse
Affiliation(s)
- Rafael A Hernandez R
- Department of Chemistry and Biochemistry, Concordia University 7141 rue Sherbrooke O. Montréal QC Canada H4B 1R6
| | - Kelly Burchell-Reyes
- Department of Chemistry and Biochemistry, Concordia University 7141 rue Sherbrooke O. Montréal QC Canada H4B 1R6
| | - Arthur P C A Braga
- Department of Chemistry and Biochemistry, Concordia University 7141 rue Sherbrooke O. Montréal QC Canada H4B 1R6
| | - Jennifer Keough Lopez
- Department of Chemistry and Biochemistry, Concordia University 7141 rue Sherbrooke O. Montréal QC Canada H4B 1R6
| | - Pat Forgione
- Department of Chemistry and Biochemistry, Concordia University 7141 rue Sherbrooke O. Montréal QC Canada H4B 1R6 .,Centre for Green Chemistry and Catalysis, McGill University 801 rue Sherbrooke O. Montréal QC Canada H3A 0B8
| |
Collapse
|
4
|
Jiang P, Wang Y, Chen D, Zheng Y, Huang S. Synthesis of 3‐Acyl‐Isoxazoles
via
Radical 5‐
endo trig
Cyclization of β,γ‐Unsaturated Ketones with NaNO
2. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101411] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ping Jiang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials Nanjing Forestry University Nanjing 210037 China
| | - Yaming Wang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials Nanjing Forestry University Nanjing 210037 China
| | - Dengfeng Chen
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials Nanjing Forestry University Nanjing 210037 China
| | - Yu Zheng
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials Nanjing Forestry University Nanjing 210037 China
| | - Shenlin Huang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials Nanjing Forestry University Nanjing 210037 China
| |
Collapse
|
5
|
Abstract
In this review article, we describe the application, reactivity and synthesis of isoxazole derivatives,
more specifically, the application, reactivity, and synthesis of 3,5-disubstituted, 3,4-
disubstituted, and 3,4,5-trisubstituted isoxazole using the green method. We review the application of
isoxazole in material science, agriculture and pharmaceutical. In material science, isoxazole is used
as a photochromic, electrochemical probe for Cu<sup>2+</sup> and, given its optical properties, in dye-sensitized
solar cells, high energy material and liquid crystal. In agriculture, isoxazole is used as an insecticide
for managing Callosobruchus chinensis, Acaricidal activity against T. cinnabarinus, and herbicidal
activities of 2-cyanoacrylates containing isoxazole. In pharmaceutical, isoxazole shows anticancer,
antituberculosis, anti-inflammatory, and acetylcholinesterase inhibitors. Further, we describe various
reactions of isoxazole such as ring opens, bromination and iodination, thioynol ethers, intramolecular
SEAr reaction, arylation, cycloaddition and photocycloaddition, photoisomerization, Domino transformation
of isoxazoles to 2,4-dicarbonyl pyrroles and rearrangement. We also describe the synthesis
of 3,5-disubstituted, 3,4-disubstituted and 3,4,5-trisubstituted isoxazole using different methods.
Collapse
Affiliation(s)
- Yogesh Walunj
- Department of Chemistry, Sir Parshurambhau College, Tilak Road, Pune, India
| | - Pravin Mhaske
- Department of Chemistry, Sir Parshurambhau College, Tilak Road, Pune, India
| | - Pramod Kulkarni
- Post Graduate Center in Organic Chemistry and Department of Chemistry, Hutatma Rajguru Mahavidyalaya, Rajgurunagar, Pune-410505, India
| |
Collapse
|
6
|
Mei W, Kong Y, Yan G. Synthetic applications of α,α-difluoroarylacetic acids and salts via decarboxylative functionalization. Org Chem Front 2021. [DOI: 10.1039/d1qo00775k] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
α,α-Difluoroarylacetic acids are stable, inexpensive and readily available building blocks which can be used to access various difluoromethylated aryl motifs via decarboxylative functionalization for the formation of carbon–carbon and carbon-heteroatom (F, O, S) bonds.
Collapse
Affiliation(s)
- Wenqiang Mei
- College of Jiyang, Zhejiang A&F University, Zhuji 311800, China
| | - Yilin Kong
- College of Jiyang, Zhejiang A&F University, Zhuji 311800, China
| | - Guobing Yan
- College of Jiyang, Zhejiang A&F University, Zhuji 311800, China
| |
Collapse
|
7
|
Krylov IB, Paveliev SA, Budnikov AS, Terent’ev AO. Oxime radicals: generation, properties and application in organic synthesis. Beilstein J Org Chem 2020; 16:1234-1276. [PMID: 32550935 PMCID: PMC7277713 DOI: 10.3762/bjoc.16.107] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 05/15/2020] [Indexed: 12/16/2022] Open
Abstract
N-Oxyl radicals (compounds with an N-O• fragment) represent one of the richest families of stable and persistent organic radicals with applications ranging from catalysis of selective oxidation processes and mechanistic studies to production of polymers, energy storage, magnetic materials design and spectroscopic studies of biological objects. Compared to other N-oxyl radicals, oxime radicals (or iminoxyl radicals) have been underestimated for a long time as useful intermediates for organic synthesis, despite the fact that their precursors, oximes, are extremely widespread and easily available organic compounds. Furthermore, oxime radicals are structurally exceptional. In these radicals, the N-O• fragment is connected to an organic moiety by a double bond, whereas all other classes of N-oxyl radicals contain an R2N-O• fragment with two single C-N bonds. Although oxime radicals have been known since 1964, their broad synthetic potential was not recognized until the last decade, when numerous selective reactions of oxidative cyclization, functionalization, and coupling mediated by iminoxyl radicals were discovered. This review is focused on the synthetic methods based on iminoxyl radicals developed in the last ten years and also contains some selected data on previous works regarding generation, structure, stability, and spectral properties of these N-oxyl radicals. The reactions of oxime radicals are classified into intermolecular (oxidation by oxime radicals, oxidative C-O coupling) and intramolecular. The majority of works are devoted to intramolecular reactions of oxime radicals. These reactions are classified into cyclizations involving C-H bond cleavage and cyclizations involving a double C=C bond cleavage.
Collapse
Affiliation(s)
- Igor B Krylov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Stanislav A Paveliev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Alexander S Budnikov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Alexander O Terent’ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| |
Collapse
|
8
|
Nakano R, Togo H. Efficient transformation of electron-rich arenes into diethyl 3-arylisoxazole-4,5-dicarboxylates. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
9
|
General Platform for the Conversion of Isoxazol-5-ones to 3,5-Disubstituted Isoxazoles via Nucleophilic Substitutions and Palladium Catalyzed Cross-Coupling Strategies. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900187] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|