Hydrochloric Acid → 5-(3-Chloro-5-fluorophenyl)-4-(3-cyanophenyl)thiophene-2-carboxylic acid

Participants

Reaction Steps

130 mg (0.34 mmol) of the compound from Example 11A are provided in 6.1 ml of tetrahydrofuran, and 80.7 mg (3.37 mmol) of lithium hydroxide and 2.0 ml of water are added at room temperature. The mixture is stirred at room temperature overnight, a 1N aqueous HCl solution is subsequently added until an acidic pH is obtained, the mixture is extracted with ethyl acetate and the extract is dried over sodium sulfate, filtered and concentrated. 119 mg (89% of theory) of the title compound are obtained.

Provenance & Evidence