Reaction of β-fluorinated vinamidinium salts with Grignard reagents and reducing agents: New facile and efficient route to fluorinated allylamines

β-Fluorinated vinamidinium salts (1) readily reacted with a series of Grignard reagents in tetrahydrofuran, followed by the action of reducing agents at room temperature, to produce stereospecifically the corresponding fluorinated allylamines (4 and 5) in good to excellent yields.