A New Synthesis of 1-(Trifluoromethyl)enamines and 1- (Trifluoromethyl)alkylamines
作者:Jean-Pierre Bégué、Dany Mesureur
DOI:10.1055/s-1989-27237
日期:——
Several 1-(trifluoromethyl)enamines were prepared by heating trifluoroacetamides with alkylidenetriphenylphosphoranes in THF or benzene. The product enamines can be reduced (H2, Pd/C) to 1-(trifluoromethyl)alkylamines.
Palladium-catalyzed cross-coupling reaction of β-amino-β-trifluoromethylvinyl bromides 7 and 8 with boronic acids has been achieved to afford new stable β,β-disubstituted α-trifluoromethyl enamines 12 and 13, which can be used as masked ketones. The ketone function can be released in acidic medium.