Abstract
AbstractA mild and efficient protocol for visible‐light and organoamine cocatalyzed difluoroalkylation of quinoxalin‐2(1H)‐ones with functionalized difluoromethyl bromides has been developed. The transformation could be carried out at room temperature and gave a variety of C‐3 difluoroalkylated quinoxaline‐2(1H)‐ones in moderate to excellent yields. Moreover, mechanistic studies revealed that this transformation proceeded through a radical‐type debrominative coupling process with only need of catalytic amount of diisopropylethylamine (DIPEA). This strategy featured wide functional group tolerance, excellent regioselectivity, mild conditions, and operational simplicity.
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