4-Chloro-2-phenoxyaniline (I) was acylated with acetyl chloride and triethylamine to afford acetamide (II). Alkylation of the amide N of (II) by 2-isopropoxybenzyl chloride (III) in the presence of NaH provided the target tertiary amide.

5-Fluoro-2-phenoxyaniline (I) was acylated with acetyl chloride and triethylamine to afford acetamide (II). Alkylation of the amide N by 2,5-dimethoxybenzyl chloride (III) in the presence of NaH provided the target tertiary amide.