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Uvarova ES, Kutasevich AV, Lipatov ES, Pytskii IS, Raitman OA, Selivantev YM, Mityanov VS. Three-component cascade reaction of 3-ketonitriles, 2-unsubstituted imidazole N-oxides, and aldehydes. Org Biomol Chem 2024; 22:4297-4308. [PMID: 38717323 DOI: 10.1039/d4ob00353e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
A three-component condensation of 2-unsubstituted imidazole N-oxides, 3-ketonitriles, and aldehydes is described. The reaction proceeds via sequential Knoevenagel condensation/Michael addition under mild, catalyst-free conditions with various substrates. Furthermore, the corresponding 2-functionalized imidazole N-oxides can be further dehydrated to (Z)-2-aroyl-3-(1H-imidazol-2-yl)-acrylonitriles, which may also be directly prepared by changing the reaction conditions as a cascade of Knoevenagel condensation/Michael addition/dehydration.
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Affiliation(s)
- Ekaterina S Uvarova
- Mendeleev University of Chemical Technology, Miusskaya Sq., 9, Moscow 125047, Russian Federation.
| | - Anton V Kutasevich
- Mendeleev University of Chemical Technology, Miusskaya Sq., 9, Moscow 125047, Russian Federation.
| | - Egor S Lipatov
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences, Vavilov str. 28/1, 119334 Moscow, Russian Federation
- Higher Chemical College of Russian Academy of Sciences, D.I. Mendeleev University of Chemical Technology of Russia, Miusskaya pl. 9, 125047, Moscow, Russian Federation
| | - Ivan S Pytskii
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Academy of Sciences, Leninsky Prospect 31 bldg. 4, 119071 Moscow, Russian Federation
| | - Oleg A Raitman
- Mendeleev University of Chemical Technology, Miusskaya Sq., 9, Moscow 125047, Russian Federation.
| | - Yuriy M Selivantev
- Mendeleev University of Chemical Technology, Miusskaya Sq., 9, Moscow 125047, Russian Federation.
| | - Vitaly S Mityanov
- Mendeleev University of Chemical Technology, Miusskaya Sq., 9, Moscow 125047, Russian Federation.
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2
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Flores-Bernal G, Miranda LD. A Copper-Mediated Radical α-Heteroarylation of Nitriles with Azobis(alkylcarbonitriles). Org Lett 2024; 26:1128-1133. [PMID: 38315447 PMCID: PMC10877592 DOI: 10.1021/acs.orglett.3c03727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 12/16/2023] [Accepted: 01/30/2024] [Indexed: 02/07/2024]
Abstract
A new practical method has been developed for the α-heteroarylation of aliphatic nitriles with heteroarenes and azobis(alkylcarbonitriles) using Cu(OAc)2 as an oxidizing agent. This method allows the easy construction of nitrile-, aryl-, and dialkyl-bearing quaternary carbon centers from readily available building blocks, without requiring prefunctionalization steps. This reaction is based on adding cyanodialkyl radicals onto heteroarenes, including benzofurans, furans, pyrroles, and indoles. The resulting α-heteroaryl nitriles are useful synthetic intermediates and pharmacophores in biologically active molecules.
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Affiliation(s)
- Gustavo
G. Flores-Bernal
- Department of Organic Chemistry,
Instituto de Química, Universidad Nacional Autónoma
de México, Circuito Exterior, Ciudad
Universitaria, 04510 Mexico City, Mexico
| | - Luis D. Miranda
- Department of Organic Chemistry,
Instituto de Química, Universidad Nacional Autónoma
de México, Circuito Exterior, Ciudad
Universitaria, 04510 Mexico City, Mexico
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Bhattacharya A, Subramaniam SV, Kandukuri NK, Peruncheralathan S. Nickel Catalyzed Selective Arylation of Geminal Dinitriles: Direct Access to α-Cyano Carbonyl Compounds. J Org Chem 2024; 89:2571-2581. [PMID: 38321703 DOI: 10.1021/acs.joc.3c02595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
The catalytic intermolecular arylation of disubstituted geminal dinitriles with in situ generated arylnickel complexes is disclosed. This method efficiently provides various all-carbon substituted α-cyanocarbonyl compounds without additives and an inert atmosphere. It also demonstrates the arylation of R-BINOL and S-BINOL derived geminal dinitriles, preserving optical purity. Mechanistic studies proved that the in situ generated organonickel complex is involved in arylation.
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Affiliation(s)
- Anwesha Bhattacharya
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, an OCC of Homi Bhabha National Institute, Khurda - 752050, India
| | - Subhashini V Subramaniam
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, an OCC of Homi Bhabha National Institute, Khurda - 752050, India
| | - Nagesh Kumar Kandukuri
- YMC Application & Purification Lab, YMC India Pvt. Ltd., Industrial Park Jeedimetla, Gajularamaram Village, Quthbullapur, Medchal, Hyderabad - 500055, India
| | - Saravanan Peruncheralathan
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, an OCC of Homi Bhabha National Institute, Khurda - 752050, India
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Zhou N, Wang L, Zhao F, Gao X, Zhao X, Zhang M. NHC-Catalyzed Tandem Reaction: A Strategy for the Synthesis of 2-Pyrrolidinone-Functionalized Phenanthridines. J Org Chem 2023; 88:16556-16565. [PMID: 37971950 DOI: 10.1021/acs.joc.3c02086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Herein, an N-heterocyclic carbene (NHC)-catalyzed tandem cyclization/addition/cyclization reaction of 2-isocyanobiaryls and α-bromo-N-cinnamylamides for the synthesis of 2-pyrrolidinone-functionalized phenanthridines is developed. This protocol features a radical cascade process, broad substrate scope, and good functional group compatibility under metal- and oxidant-free reaction conditions.
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Affiliation(s)
- Nengneng Zhou
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Lei Wang
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Fangli Zhao
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Xiang Gao
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Xiaowei Zhao
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Man Zhang
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
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