Hydrochloric Acid → 4,5-Dihydro-6-oxa-1-thia-benzo[e]azulene-9-carboxylic acid

Participants

Reaction Steps

To a solution of 2-[(2,4-dichloro-phenyl)-methyl-carbamoyl]-4,5-dihydro-6-oxa-1-thia-benzo[e]azulene-9-carboxylic acid methyl ester (700 mg) in THF (8 mL) and ethanol (4 mL) was added sodium hydroxide solution (121 mg in 4 mL of water) and the reaction stirred at room temperature for 16 h. The reaction was then acidified with 2 M hydrochloric acid and the resulting solid was filtered and air-dried to give 2-(2,4-dichloro-phenyl)-methyl-carbamoyl]-4,5-dihydro-6-oxa-1-thia-benzo[e]azulene-9-carboxylic acid.

Provenance & Evidence