Sodium Hydroxide → 7-chlorobenzofuran-4-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

A mixture of 7-chloro-benzofuran-4-carboxylic acid ethyl ester (3.90 mmol) and sodium hydroxide (5.85 mmol) in MeOH (4.4 mL) and water (4.4 mL) is heated to 55° C. for 90 min. The mixture is concentrated in vacuo and made acidic by addition of hydrochloric acid (1.0 M). The obtained precipitate is filtered off and dried in vacuo to give the desired product. 1H-NMR (DMSO-d6): δ=13.3 (bs, 1H); 8.27 (s, 1H); 7.89 (d, J=8.3 Hz, 1H); 7.56 (d, J=8.3 Hz, 1H); 7.42 (s, 1H).

Provenance & Evidence