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Lee H, Kim C. Synthesis of air‐stable poly(benzonorbornadiene)s via ring‐opening metathesis polymerization. JOURNAL OF POLYMER SCIENCE 2023. [DOI: 10.1002/pol.20220677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- Huijin Lee
- Department of Chemistry Chungbuk National University Cheongju South Korea
| | - Cheoljae Kim
- Department of Chemistry Chungbuk National University Cheongju South Korea
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Kim K, Lee Y. Copper-Catalyzed Hydroamination of Oxa- and Azabenzonorbornadienes with Pyrazoles. J Org Chem 2021; 87:569-578. [PMID: 34951305 DOI: 10.1021/acs.joc.1c02576] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient and highly chemo- and stereoselective copper-catalyzed hydroamination of oxa- and azabenzonorbornadienes with various pyrazole derivatives is described. This catalytic process is promoted by the presence of N-heterocyclic carbene ligands and KOt-Bu under mild and simple reaction conditions, and allows for the direct synthesis of new and versatile functionalized oxa(aza)benzonorbornyl pyrazoles starting from readily available oxa(aza)bicyclic alkenes. The synthetic utility of this method was demonstrated by the transformation of the obtained products into pyrazolyl-substituted naphthalenes.
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Affiliation(s)
- Kundo Kim
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Yunmi Lee
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
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Lin Q, Yang W, Yao Y, Li Y, Wang L, Yang D. Copper-Catalyzed Cycloaddition of Heterobicyclic Alkenes with Diaryl Disulfides to Synthesize Dihydrobenzo[b]thiophene Derivatives. J Org Chem 2021; 86:4193-4204. [PMID: 33621086 DOI: 10.1021/acs.joc.0c03034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel copper-catalyzed cycloaddition of diaryl disulfides to heterobicyclic alkenes has been developed. The C-S and C-C bonds can be formed simultaneously on the C═C bond of the olefins via a single-step cycloaddition to afford a series of 2,3-dihydrobenzo[b]thiophene derivatives. This reaction exhibits excellent diastereoselectivity and relatively broad substrate scope. Various functional groups attached to the substrates are tolerated in this protocol to give the corresponding exo adducts in moderate yields.
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Affiliation(s)
- Qifu Lin
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, People's Republic of China.,College of Marine Sciences, Beibu Gulf University, Qinzhou 535011, People's Republic of China
| | - Wen Yang
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, People's Republic of China
| | - Yongqi Yao
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, People's Republic of China
| | - Yue Li
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, People's Republic of China
| | - Lin Wang
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, People's Republic of China
| | - Dingqiao Yang
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, People's Republic of China
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