Potassium Carbonate → Ethyl 2-(3-bromo-5-chloro-4-(2,2,2-trifluoroethoxy)phenyl)acetate

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of ethyl 2-(3-bromo-5-chloro-4-hydroxyphenyl)acetate (2 g, 6.8 mmol), potassium carbonate (2.35 g, 17.0 mmol) in dry DMF (20 mL), was slowly added trifluoro ethyl iodide (8.58 g, 4.0 mL, 40.8 mmol) at room temperature, the reaction mixture was slowly heated to 100° C. and heating was continued for 4 h. Upon which the reaction mixture was poured onto water and extracted with ethyl acetate (2×50 mL). The combined organic layers were washed with water, dried over Na2SO4 and evaporated under reduced pressure. Purification by column chromatography over silica gel (hexane/EtOAc) to gave compound ethyl 2-(3-bromo-5-chloro-4-(2,2,2-trifluoroethoxy)phenyl)-acetate (0.750 g, 30% yield). 1H NMR (CDCl3, 400 MHz): 7.43 (s, 1H); 7.34 (s, 1H); 4.4 (q, 2H), 4.13 (q, 2H); 3.55 (t, 1H); 1.93 (m, 1H), 1.58 (m, 1H); 1.45 (m, 1H); 1.24 (t, 3H), 0.92 (d, 6H);

Provenance & Evidence