The D-(threo)-1-p-substituted-phenyl-2-dichloroacetamido-3-fluoro-1-propanol derivatives were prepared according to the following reaction sequence: The amino group of (I) was protected with phthalicanhydride (II), followed by substitution of the primary hydroxy group with diethylamine - sulfur-trifluoride to (III), deprotection with hydrazine to the amine (IV) and acetylation with methyldichloro-acetate (B) to the target compounds.