Visible-light-promoted organic dye catalyzed perfluoroalkylation of hydrazones under mild conditions

[Display omitted] •A general and facile visible-light-promoted method.•Metal-free organic dye catalyzed perfluoroalkylation of hydrazones.•Excellent functional group compatibility, broad substrate scope, moderate to excellent yields (26–85%), gram-scale. A general and facile visible-light-promoted organic dye catalyzed perfluoroalkylation of hydrazones has been developed using inexpensive and non-toxic Eosin Y as the photoredox catalyst under mild conditions. This reaction protocol exhibits synthetic simplicity, broad scope of substrates, and excellent functional group compatibility. A gram scale synthesis can be also facilitated with a satisfactory yield, which opens up the possibility of practical applications.