which prompted us to use an intramolecular redox reaction mediated by N-heterocyclic carbenes (NHCs) for the preparation of FADIs. Instead of the enoates, γ,γ-difluoro-α,β-enal 20 and γ,γ-difluoro-α,β-enoylsilane 34 were converted to FADIs by an NHC-mediated intramolecular redox reaction, whereby aldehyde components reduced the allylic difluoride component in an SN2′ manner with accompanying monodefluorination