Hydrochloric Acid → 2-[4-(2,4-difluoro-phenyl)-4H-[1,2,4]triazol-3-yl]-4,5-dihydro-6-oxa-1-thia-benzo[e]azulene-9-carboxylic acid

Participants

Reaction Steps

To a solution of 2-[4-(2,4-difluoro-phenyl)-4H-[1,2,4]triazol-3-yl]-4,5-dihydro-6-oxa-1-thia-benzo[e]azulene-9-carboxylic acid methyl ester (210 mg) in THF (4 mL) and ethanol (2 mL) was added sodium hydroxide solution (38 mg in 2 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-[4-(2,4-difluoro-phenyl)-4H-[1,2,4]triazol-3-yl]-4,5-dihydro-6-oxa-1-thia-benzo[e]azulene-9-carboxylic acid.

Provenance & Evidence