Abstract
A practical and facile difluorocarbene-triggered cycloaddition reaction of enaminones was developed, which delivered 2,2-difluoro-2,3-dihydrofurans with a broad substrate scope. Notably, the reaction proceeded smoothly without any extra additives. Readily available sodium chlorodifluoroacetate (ClCF2CO2Na, SCDA) served as a difluorocarbene precursor in this transformation through DMF-promotion. Moreover, it is proved that the 2,2-difluoro-2,3-dihydrofuran derivatives exhibit potential antiproliferative activity against human tumour cells HeLa, MCF7 and HepG2.
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