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Facile Synthesis of Tricyclic 1,2,4-Oxadiazolines-Fused Tetrahydro-Isoquinolines from Oxime Chlorides with 3,4-Dihydroisoquinoline Imines. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27103064. [PMID: 35630538 PMCID: PMC9145198 DOI: 10.3390/molecules27103064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Revised: 05/05/2022] [Accepted: 05/09/2022] [Indexed: 11/25/2022]
Abstract
A mild and efficient strategy for the synthesis of tricyclic 1,2,4-oxadiazolines-fused tetrahydro-isoquinolines derivatives via [3 + 2] cycloaddition reaction is reported. The reactions provided the functionalized tricyclic 1,2,4-oxadiazolines in high yields (up to 96%). This protocol is simple and easy to handle. Moreover, a gram-scale experiment further highlights the synthetic utility. The chemical structure of the product was determined by X-ray single-crystal structure analysis. A possible mechanism for this transformation is proposed to explain the reaction process.
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2
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Li X, Liao S, Chen Y, Xia C, Wang G. Cobalt(II) nitrate promoted cyclization of benzoyl hydrazone for the synthesis of 2,5-diphenyl-1,3,4-oxadiazole derivatives. JOURNAL OF CHEMICAL RESEARCH 2021. [DOI: 10.1177/17475198211045932] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A Co(NO3)2 method to promote cyclization of benzoyl hydrazone for the formation of 2,5-diphenyl-1,3,4-oxadiazoles has been developed. The reaction proceeded smoothly and was promoted by Co(NO3)2 under air at 110 °C in DCE; 16 examples of products were obtained.
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Affiliation(s)
| | | | - Yu Chen
- Shandong Polytechnic College, Jining, P.R. China
| | - Chengcai Xia
- Pharmacy College, Institute of Pharmacology, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai’an, P.R. China
| | - Guodong Wang
- Pharmacy College, Institute of Pharmacology, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai’an, P.R. China
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5
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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: 2.1] [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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6
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Yang TH, Kuo CW, Kavala V, Konala A, Huang CY, Yao CF. Regioselective switching approach for the synthesis of α and δ carboline derivatives. Chem Commun (Camb) 2017; 53:1676-1679. [DOI: 10.1039/c6cc09468f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A metal-free protocol for accessing both α and δ-carboline derivatives, starting from a common indolylchalcone oxime ester precursor is reported.
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Affiliation(s)
- Tang-Hao Yang
- Department of Chemistry
- National Taiwan Normal University
- Taipei
- Taiwan
| | - Chun-Wei Kuo
- Department of Chemistry
- National Taiwan Normal University
- Taipei
- Taiwan
| | | | - Ashok Konala
- Department of Chemistry
- National Taiwan Normal University
- Taipei
- Taiwan
| | - Chia-Yu Huang
- Department of Chemistry
- National Taiwan Normal University
- Taipei
- Taiwan
| | - Ching-Fa Yao
- Department of Chemistry
- National Taiwan Normal University
- Taipei
- Taiwan
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7
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Ichake SS, Konala A, Kavala V, Kuo CW, Yao CF. Palladium-Catalyzed Tandem C–H Functionalization/Cyclization Strategy for the Synthesis of 5-Hydroxybenzofuran Derivatives. Org Lett 2016; 19:54-57. [DOI: 10.1021/acs.orglett.6b03310] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Sachin S. Ichake
- Department of Chemistry, National Taiwan Normal University, 88, Section 4, Ting-Chow Road, Taipei 116, Taiwan, R.O.C
| | - Ashok Konala
- Department of Chemistry, National Taiwan Normal University, 88, Section 4, Ting-Chow Road, Taipei 116, Taiwan, R.O.C
| | - Veerababurao Kavala
- Department of Chemistry, National Taiwan Normal University, 88, Section 4, Ting-Chow Road, Taipei 116, Taiwan, R.O.C
| | - Chun-Wei Kuo
- Department of Chemistry, National Taiwan Normal University, 88, Section 4, Ting-Chow Road, Taipei 116, Taiwan, R.O.C
| | - Ching-Fa Yao
- Department of Chemistry, National Taiwan Normal University, 88, Section 4, Ting-Chow Road, Taipei 116, Taiwan, R.O.C
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