期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 21, 期 2, 页码 370-374出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ob01914k
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A concise and efficient ring-opening difluorination strategy has been developed for the synthesis of highly functionalized hydroxy-containing α,α-difluoro-β-ketoamides. This transition-metal-free synthetic procedure showed good functional group compatibility and attractive practical potential for large-scale synthesis.
A concise and efficient ring-opening difluorination strategy was developed for the synthesis of highly functionalized hydroxy-containing alpha,alpha-difluoro-beta-ketoamides from the one-pot multicomponent reaction of 4-aminocoumarins, NFSI, and water in dimethyl carbonate (DMC) as a green solvent. The reactions were smoothly achieved under visible light irradiation in air at room temperature without the addition of any other external photocatalysts. With this protocol, various alpha,alpha-difluoro-beta-ketoamides were successfully synthesized under mild conditions (25 examples, 73-91% yields). This transition-metal-free synthetic procedure shows good functional group compatibility and attractive practical potential for large-scale synthesis.
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