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Shirisha T, Majhi S, Balasubramanian S, Kashinath D. Metal-free C(sp 3)-H functionalization (C-C and C-N bond formation) of 1,2,3,4-tetrahydroacridines using deep eutectic solvents as catalyst and reaction medium. Org Biomol Chem 2024; 22:1434-1440. [PMID: 38265125 DOI: 10.1039/d3ob01752d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
Herein, we report a metal-free and efficient method for the C(sp3)-H functionalization of 1,2,3,4-tetrahydroacridines at the C4-position by the addition of azodicarboxylates (C-N bond) and maleimides (C-C bond) using deep eutectic solvents (DESs) at 80 °C. The C4-functionalized 1,2,3,4-tetrahydroacridines were achieved with high atom efficiency, precise regioselectivity, and yields ranging from 70-96%. The practicality of the developed method has been demonstrated through gram-scale synthesis. Also the green-metrics were calculated for the developed method and it was found that the metrics are near to the ideal values.
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Affiliation(s)
| | - Subir Majhi
- Department of Chemistry, National Institute of Technology, Warangal-506 004, India.
| | - Sridhar Balasubramanian
- Centre for X-ray Crystallography, Department of Analytical & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Uppal Road, Hyderabad-500007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201 002, India
| | - Dhurke Kashinath
- Department of Chemistry, National Institute of Technology, Warangal-506 004, India.
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Hu Z, Jiang G, Zhu Z, Gong B, Xie Z, Le Z. One-Pot Domino Henry-Friedel-Crafts Alkylation Reaction in Deep Eutectic Solvent. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202006029] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Le Z, Hu Z, Chen X, Yan L, Liu Y, Xie Z. Synthesis of Triarylmethane Derivatives by Baeyer Condensation in a Deep Eutectic Solvent. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202106003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Hu Z, Xie Z, Zhu Z, Gong B, Jiang G, Le Z. Synthesis of Mannich-type derivatives from amides activated by hydrogen bonding with ZnCl 2. Org Biomol Chem 2020; 18:9095-9099. [PMID: 33146660 DOI: 10.1039/d0ob01989e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The amide group has one of the most significant functionalities found in many natural products. Herein, low-nucleophilic amides are used in a Mannich-type reaction to synthesize N-acyl-protected amine derivatives. A highly efficient synthetic method utilizing simple aldehydes, N-substituted anilines, and amides as substrates was established through a one-pot amide pathway activated by hydrogen bonding between the ZnCl2 and amide under solvent-free conditions. This strategy can be broadly applied to medicinal chemistry. More importantly, compared with the previous Lewis acid catalyzed reaction, we proposed a new application of zinc chloride.
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Affiliation(s)
- Zhiyu Hu
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China. and School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Zongbo Xie
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China. and School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Zhiqiang Zhu
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China. and School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Bozhen Gong
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China. and School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Guofang Jiang
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China. and School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Zhanggao Le
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China. and School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, Jiangxi, China.
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