4-Aminobenzoic Acid → HCID 90410908, compound

Participants

Reaction Steps

Mixing 4-amino benzoic acid and lithium hydroxide in DMAc, then adding 3,5-dibromo-6H-anthra[1,9-cd]isoxazol-6-one into the mixture and raising the temperature to about 45° C. to 55° C. Stirring the reaction mixture for 18-20 hours. Slowly adding MTBE to the reaction mixture and then cooling to 0 to 10° C. Filtering the solid and drying at room temperature to get 4-((3-bromo-6-oxo-6H-anthra[1,9-cd]isoxazol-5-yl)amino)benzoic acid (Intermediate 5).

Provenance & Evidence