Multi-step reactions of N-monosubstituted (polyfluoroalkane)thioamides with alkyllithium reagents

Reactions of t-BuLi or MeLi with N-alkylamides of polyfluoroalkanethioncarboxylic acids containing an α-proton on the N-alkyl substituent and a polyfluoroalkyl substituent larger than CF3 gave N-monosubstituted α,β-unsaturated fluorinated thioamides.