Hydrochloric Acid → 5-Methanesulfonyl-2-(2,2,2-trifluoro-ethylsulfanyl)-benzoic acid

Participants

Reaction Conditions

Reaction Steps

To a solution of 4.58 mmol 2-fluoro-5-methanesulfonyl-benzoic acid (Example B4(b)) in 6 ml N,N-dimethylformamide were added 13.8 mol cesium carbonate and 9.16 mmol 2,2,2-trifluoro-ethanethiol and the mixture was stirred at 90° C. for 30 min. The reaction mixture was then cooled to room temperature and acidified to pH1 by addition of hydrochloric acid before being extracted three times with ethyl acetate. The combined organic phases were dried over sodium sulfate and concentrated in vacuo to afford the title compound as a red-brown solid which was used in the next step without further purification (yield 99%). MS (m/e): 312.9 ([M−H]−, 100%).

Provenance & Evidence