Ethyl bromoacetate → Ethyl (3-{3-[4-(2-bromo-5-fluorophenoxy)piperidin-1-yl]-1,2,4-oxadiazol-5-yl}-1H-pyrrol-1-yl)acetate

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-(2-bromo-5-fluorophenoxy)-1-[5-(1H-pyrrol-3-yl)-1,2,4-oxadiazol-3-yl]piperidine (60 mg, 0.15 mmol) in DMF (491 μL) was added sodium hydride (11.8 mg, 0.3 mmol). After 5 min, ethyl bromoacetate (25 μL, 0.22 mmol) was added and the mixture was heated at 80° C. for 3 h. The mixture was poured onto ice cold 1N HCl (2 mL) and extracted with EtOAc (3×2 mL). The combined organic fractions were washed with water (2 mL) and then dried over Na2SO4. The solvent was evaporated. Purification by Combiflash chromatography (SiO2-12 g, gradient elution of 30-60% EtOAc/hexanes over 25 min) gave the title compound.

Provenance & Evidence