Acetic Acid → HCID 178518307, compound

Participants

Reaction Conditions

Reaction Steps

To a 2000 mL flask charged with 2-amino-3-bromobenzoic acid (67.0 g, 310 mmol) was added water (750 mL) and AcOH (18.8 mL). The suspension was heated to 35° C. A solution of NaOCN (30.82 g, 403 mmol, 85% purity) in water (250 mL) was added dropwise at 35° C. The reaction mixture was stirred at 35° C. for 2 hrs. NaOH (415 g, 10.38 mol) was added in portions, the reaction temperature was kept below 40° C. during the addition. The mixture turned clear for a short time, then an off-white suspension was formed. The reaction mixture was cooled to room temperature, and filtered. The obtained solid was dissolved in hot water, pH was adjusted to 5 by addition of 6 N HCl. The resulting mixture was cooled to room temperature, and the precipitate was collected by filtration, rinsed with a small amount of DCM, cold MeOH, ether, then dried in vacuo to yield the title compound as a off-white solid (43.32 g, 58%). 1HNMR (DMSO-d6, 400 MHz): δ 11.60-11.40 (br s, 1H), 10.40-10.20 (br s, 1H), 7.92 (d, J=7.6 Hz, 1H), 7.90 (d, J=8.0 Hz, 1H), 7.12 (dd, J=7.6, 8.0 Hz, 1H).

Provenance & Evidence