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Jiang KM, Luesakul U, Zhao SY, An K, Muangsin N, Neamati N, Jin Y, Lin J. Tautomeric-Dependent Lactam Cycloaddition with Nitrile Oxide: Facile Synthesis of 1,2,4-Oxadiazole[4,5- a]indolone Derivatives. ACS OMEGA 2017; 2:3123-3134. [PMID: 30023685 PMCID: PMC6044867 DOI: 10.1021/acsomega.7b00490] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 06/19/2017] [Indexed: 06/08/2023]
Abstract
A concise, metal-free, and gram-scale strategy to convert indoline-2,3-diones to 1,2,4-oxadiazole[4,5-a]indolones through an improved [3 + 2] cycloaddition of α-ketone-lactam with nitrile oxides has been developed. The lactim form of the resonance structure of isatin in protic solvents is the key active dipolarophile that shows chemo- and regioselectivity under experimental and theoretical conditions. This strategy conveniently enabled the assembly of several 1,2,4-oxadiazole[4,5-a]indolines with a broad range of functional groups. Compounds 3a and 4b exhibit cytotoxicity in the NCI/ADR-RES, SKOV3, and OVCAR8 cell lines.
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Affiliation(s)
- Kun-Ming Jiang
- Key
Laboratory of Medicinal Chemistry for Natural Resource, Ministry of
Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
| | - Urarika Luesakul
- Department
of Medicinal Chemistry, College of Pharmacy, and Translational Oncology
Program, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department
of Chemistry, Faculty of Science, Chulalongkorn
University, Bangkok 10330, Thailand
| | - Shu-Yue Zhao
- Key
Laboratory of Medicinal Chemistry for Natural Resource, Ministry of
Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
| | - Kun An
- Key
Laboratory of Medicinal Chemistry for Natural Resource, Ministry of
Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
| | - Nongnuj Muangsin
- Department
of Chemistry, Faculty of Science, Chulalongkorn
University, Bangkok 10330, Thailand
| | - Nouri Neamati
- Department
of Medicinal Chemistry, College of Pharmacy, and Translational Oncology
Program, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Yi Jin
- Key
Laboratory of Medicinal Chemistry for Natural Resource, Ministry of
Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
- Department
of Medicinal Chemistry, College of Pharmacy, and Translational Oncology
Program, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Jun Lin
- Key
Laboratory of Medicinal Chemistry for Natural Resource, Ministry of
Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
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