Hydrochloric Acid → 5-chloro-2-(ethylamino)benzoic Acid

Participants

Reaction Conditions

Reaction Steps

150 mg (0.67 mmol) of 6-chloro-1-ethyl-1H-benzo[d][1,3]oxazine-2,4-dione were suspended in 1.33 ml of 2N KOH and the mixture was heated to 95° C. for 2 h. After cooling to RT the pH was adjusted to 5-6 by careful addition of 1N HCl. The precipitate was then filtered off, washed with water and dried to give 93 mg (71%) of 5-chloro-2-ethylamino-benzoic acid as a yellow solid. 1HNMR (DMSO-d6, 300 MHz): δ 1.13 (t, J=7.2 Hz, 3H), 3.12 (q, J=7.2 Hz, 2H), 6.68 (d, J=9.1 Hz, 1H), 7.31 (dd, J=9.1 and 2.7 Hz, 1H), 7.64 (d, J=2.7 Hz, 1H).

Provenance & Evidence