Hydrochloric Acid → HCID 10443643, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-acetylamino-4-dimethylamino-5-nitrobenzoic acid (6.5 g), concentrated hydrochloric acid (20 ml), and water (80 ml) is stirred at 100° C. for 30 minutes. After cooling, solid sodium hydroxide (5 g) and then 10% aqueous sodium hydroxide solution are added until the mixture becomes a clear solution. The resulting solution is adjusted to the pH of about 4 with acetic acid. The precipitate is collected and recrystallized from methanol to give the title compound (4.8 g), mp 240°-250° C.

Provenance & Evidence