Condensation of chloroacetyl derivative (I) with phenolic compound (II) by means of K2CO3 in DMF affords the desired compound.
Alkylation of (R)-2-methylpiperazine (I) with 4-fluorobenzyl bromide (II) provides 1-(4-fluorobenzyl)-3-methylpiperazine (III). Subsequent acylation of piperazine (III) with (4-chlorophenoxy)acetyl chloride (IV) furnishes the title amide.
In a further method, 1-(4-fluorobenzyl)-3-methylpiperazine (I) is acylated by chloroacetyl chloride to provide the chloroacetamide (II). Subsequent chloride displacement with 4-chlorophenol (III) leads to the target chlorophenoxy acetamide.