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Thakur DG, Sahoo T, Sen C, Rathod N, Ghosh SC. Palladium-Catalyzed Directed Aldehyde C-H Arylation of Quinoline-8-carbaldehydes: Exploring the Reactivity Differences between Aryl (Pseudo) Halides. J Org Chem 2022; 87:16343-16350. [PMID: 36413613 DOI: 10.1021/acs.joc.2c02011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We have developed a method for Pd-catalyzed direct C-H arylation of quinoline-8-carbaldehydes with either aryl iodides or aryl diazonium salts for the synthesis of aryl quinolinyl ketones. Aryl iodide substituted with an electron-donating group favors the reaction, whereas aryl diazonium salt substituted with an electron-withdrawing group showed excellent reactivity. A range of aryl quinolinyl ketones were synthesized in good-to-excellent yields, with very good functional group tolerance. Our methodology was successfully applied to synthesize highly potent tubulin polymerization inhibitors and can be easily scaled up to a gram scale.
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Affiliation(s)
- Dinesh Gopichand Thakur
- Natural Products and Green Chemistry Division, Central Salt and Marine Chemicals Research Institute (CSIR), G. B. Marg, Bhavnagar 364002, Gujarat, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Tapan Sahoo
- Natural Products and Green Chemistry Division, Central Salt and Marine Chemicals Research Institute (CSIR), G. B. Marg, Bhavnagar 364002, Gujarat, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Chiranjit Sen
- Natural Products and Green Chemistry Division, Central Salt and Marine Chemicals Research Institute (CSIR), G. B. Marg, Bhavnagar 364002, Gujarat, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Nilesh Rathod
- Natural Products and Green Chemistry Division, Central Salt and Marine Chemicals Research Institute (CSIR), G. B. Marg, Bhavnagar 364002, Gujarat, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Subhash Chandra Ghosh
- Natural Products and Green Chemistry Division, Central Salt and Marine Chemicals Research Institute (CSIR), G. B. Marg, Bhavnagar 364002, Gujarat, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Jiang F, Xu M, Bei W, Cheng K, Huang L. Palladium-catalyzed native α-amino acid derivative-directed arylation/oxidation of benzylic C-H bonds: synthesis of 5-aryl-1,4-benzodiazepin-2-ones. Chem Commun (Camb) 2022; 58:9638-9641. [PMID: 35938553 DOI: 10.1039/d2cc03266j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Pd-catalyzed, native α-amino acid derivative-directed benzylic C-H bond arylation/oxidation with aryl iodides was developed. The natural amino acid auxiliary could serve as a desired building block for formation of 5-aryl-1,4-benzodiazepin-2-ones after removal of the trifluoroacetyl protecting group. The bifunctional reaction probably proceeded through a sequential benzylic arylation/oxidation process.
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Affiliation(s)
- Fengxuan Jiang
- Key Laboratory of Alternative Technologies for Fine Chemicals Process, Institute of Applied Chemistry, Shaoxing University, Shaoxing, Zhejiang Province 312000, People's Republic of China.,School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang Province 325035, People's Republic of China.
| | - Menghua Xu
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Bioactive Natural Product Research, Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Wenfeng Bei
- Key Laboratory of Alternative Technologies for Fine Chemicals Process, Institute of Applied Chemistry, Shaoxing University, Shaoxing, Zhejiang Province 312000, People's Republic of China
| | - Kai Cheng
- Key Laboratory of Alternative Technologies for Fine Chemicals Process, Institute of Applied Chemistry, Shaoxing University, Shaoxing, Zhejiang Province 312000, People's Republic of China
| | - Lehao Huang
- School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang Province 325035, People's Republic of China.
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