2,3,3-Triffuoro-1-aryl- or -1-alkyl-prop-1-enyl toluene-p-sulfonates 1, readily available from 2,2,3,3-tetrafluoropropanol, react smoothly with alcohols in the presence of sodium hydroxide at ambient temperature for 1 h to afford the corresponding alpha-fluoro-beta,beta-dialkoxy ketones 2 in good to excellent yields.