To a stirred solution of 2-methoxyphenylpiperazine (0.062 g, 0.32 mmol) and 2-(2,2,2-trifluoroethoxy)phenylacetic acid (0.075 mg, 0.32 mmol) in DMF (1 mL) was added EDC (0.115 g, 0.40 mmol), HOBT (0.049 g, 0.32 mmol), and DIEA (0.055 mL, 0.32 mmol). The mixture was stirred at ambient temperature for 18 h. The DMF was removed under reduced pressure. The residue was partitioned between EtOAc and saturated aqueous NaHCO3. The EtOAc layer was dried (MgSO4), filtered, and the solvent was removed under reduced pressure. The residue was purified by preparative TLC using 1:1 EtOAc:hexane as eluant. The title compound was obtained as an amorphous solid.
