期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 143, 期 49, 页码 20616-20621出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.1c10517
关键词
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资金
- JST CREST Grant [JPMJCR20R3]
- JSPS KAKENHI [JP19K05455, 21H05212]
- China Scholarship Council (CSC) [CSC 201906420088]
- Grants-in-Aid for Scientific Research [21H05212] Funding Source: KAKEN
The study reports a new method catalyzed by BF3 for carbon elongation of benzylic fluorides. Through DFT calculation study, it was found that the BF3 catalyst could contribute to both C-F bond cleavage and re-formation. This method shows high diastereoselectivity and can be applied to various benzylic fluorides and diazo esters for synthesis.
Selective transformation of C-F bonds remains a significant goal in organic chemistry, but C-F insertion of a onecarbon-atom unit has never been established. Herein we report the BF3-catalyzed formal insertion of diazo esters as one-carbon-atom sources into C-F bonds to accomplish one-carbon elongation of benzylic fluorides. A DFT calculation study revealed that the BF3 catalyst could contribute to both C-F bond cleavage and re-formation. This elongation provided alpha-fluoro-alpha,beta-diaryl esters with a high level of diastereoselectivity. Various benzylic fluorides and diazo esters were applicable. The synthetic utility of this method was demonstrated by the synthesis of a fluoro analogue of a compound that is used as a transient receptor and potential canonical channel inhibitor.
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