Ethyl bromoacetate → Ethyl 2-[2,4-difluoro-3-[[2-fluoro-3-(3-fluorophenyl)-5-methyl-phenyl]methylamino]phenoxy]acetate

Participants

Reaction Steps

To a stirred solution of 2,4-difluoro-3-[[2-fluoro-3-(3-fluorophenyl)-5-methyl-phenyl]methylamino]phenol (100 mg, 0.30 mmol, 1.0 eq) and Na2CO3 (58 mg, 0.60 mmol, 2.0 eq) in 2-butanone (10 mL) was added ethyl bromoacetate (75.1 mg, 0.45 mmol, 1.5 eq). The mixture was stirred at room temperature for 3 h. TLC showed the reaction to be incomplete so Cs2CO3 (50 mg, 0.15 mmol, 0.5 eq) was added and the reaction stirred a further 3 h. TLC showed the reaction was still not finished so ethyl bromoacetate (0.2 mL) was added and the reaction stirred for a further 1 h. The solution was then poured into water and extracted with EtOAc. The combined organic extracts were washed with water and brine, dried (Na2SO4) and evaporated in vacuo. The residue was purified by chromatography (EtOAc:petroleum ether, 0:1 to 1:10) to give the title compound as a solid (100 mg, 81%).

Provenance & Evidence