Water → 6-Bromo-1-benzothiophene-2-carboxylic acid

Participants

Reaction Steps

LiOH.H2O (1.85 g, 44 mmol) and water (20 mL) were added to a stirred solution of 6-bromo-benzo[b]thiophene-2-carboxylic acid methyl ester (I-25a: 2.4 g, 8.85 mmol) in THF (25 mL) at room temperature. The resulting mixture was stirred at room temperature for 2 hours. The reaction was monitored by TLC (100% ethyl acetate). The reaction mixture was concentrated, acidified with 2N HCl, filtered and the residue was washed with n-hexane to afford 1.9 g of the product (84% yield).

Provenance & Evidence