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Seok JE, Kim HT, Kim J, Lee JH, Jaladi AK, Hwang H, An DK. Effective magnesium‐catalyzed hydroboration of nitriles and imines. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ji Eun Seok
- Kangwon National University College of Natural Sciences Chemistry KOREA, REPUBLIC OF
| | - Hyun Tae Kim
- Kangwon National University College of Natural Sciences Chemistry KOREA, REPUBLIC OF
| | - Jaeho Kim
- Kangwon National University College of Natural Sciences Chemistry KOREA, REPUBLIC OF
| | - Ji Hye Lee
- Kangwon National University Chemistry KOREA, REPUBLIC OF
| | | | - Hyonseok Hwang
- Kangwon National University College of Natural Sciences Chemistry KOREA, REPUBLIC OF
| | - Duk Keun An
- Kangwon National University Chemistry KangwondoHyoja-2-dong 200-701 Chuncheon KOREA, REPUBLIC OF
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Song H, Shen Y, Zhou H, Ding D, Yang F, Wang Y, Xu C, Cai X. Light-Promoted Low-Valent-Tungsten-Catalyzed Ambient Temperature Amination of Boronic Acids with Nitroaromatics. J Org Chem 2022; 87:5303-5314. [PMID: 35362972 DOI: 10.1021/acs.joc.2c00138] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Triggering C-N bond formation with nitroaromatics and boronic acids at mild conditions is highly desirable, since most prior works were carried out under harsh conditions and sometimes suffered from poor chemo- or regioselectivity. Herein, a low-valent-tungsten-catalyzed reaction that enables the ambient temperature amination of boronic acids with nitroaromatics is disclosed. With readily available W(CO)6 as a precatalyst under external-photosensitizer-free conditions, nitroaromatics smoothly undergo C-N coupling reactions with their boronic acid partners, delivering structurally diverse secondary amines in good yields (>50 examples, yields up to 96%). This methodology is both scalable and highly chemoselective and engages both aliphatic and aromatic boronic acid partners. The catalysis is initiated by the deoxygenation of nitroaromatics by a trans-[W(CO)4(PPh3)2] (trans-W, PPh3 = triphenylphosphine) complex, which forms in situ via ligand replacement.
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Affiliation(s)
- Heng Song
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, P. R. China
| | - Yang Shen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, P. R. China
| | - Hu Zhou
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, P. R. China
| | - Danli Ding
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, P. R. China
| | - Fu Yang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, P. R. China
| | - Yemei Wang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, P. R. China
| | - Chen Xu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, P. R. China
| | - Xingwei Cai
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, P. R. China
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