Reactions of trifluoroamine oxide: a new method for selective fluorination of 1,3-diketones and β-ketoesters

Fluorination of 1,3-diketones and β-ketoesters with trifluoroamine oxide in the presence of tetrabutylammonium hydroxide (TBAH) provides a one step route to mono- and difluoro-products selectively fluorinated at the α-position in good yields.