Hydrogen Bromide → 2-Amino-5-bromo-3-methylbenzoic acid

Participants

Reaction Steps

To a solution of 2-amino-3-methylbenzoic acid (10.0 g, 66 mmol) in DMSO was added 48% aqueous hydrogen bromide (18.0 ml). The reaction solution was stirred at room temperature overnight and then quenched with saturated sodium bicarbonate. The resultant mixture was stirred overnight. Precipitation was collected by filtration and dried in vacuo to give 2-amino-5-bromo-3-methylbenzoic acid (13.0 g, 85%) as a pink solid: 1H NMR (500 MHz, DMSO) δ 7.69 (d, J=1.0 Hz, 1H), 7.33 (d, J=1.0 Hz, 1H), 2.10 (s, 3H); MS (ESI+) m/z 231 (M+H).

Provenance & Evidence