Lithium Hydroxide → 5-Chloro-3-(trifluoromethyl)-1-benzothiophene-2-carboxylic acid

Participants

Reaction Steps

A mixture of compound 11e (390 mg, 1.33 mmol) and LiOH (159 mg, 6.65 mmol) in THF/MeOH/H2O (4/4/4 mL) was stirred for 4 h. The reaction was concentrated under reduced pressure and then water was added to the residue. The aqueous mixture was acidified with 1N HCl to pH ˜4. A white precipitate was filtered and washed with water and Et2O. The crude product was dried under vacuum to give compound 11f which was used without purification.

Provenance & Evidence