m-Chloroperbenzoic acid → 2-(4-Carboxy-2-chlorophenyl)-6-hydroxyquinoline 1-oxide

Participants

Reaction Steps

To a solution of 3-chloro-4-(6-hydroxyquinolin-2-yl)benzoic acid (Compound 8) (620 mg) in HOAc (8 mL) was added 3-chloroperbenzoic acid (77% pure, 1.19 g). The resultant mixture was heated at 90° C. over 3 hour. After removal of HOAc under reduced pressure, the resultant mixture was trituated with DCM and recrystallized from EtOH/water twice to afford the desired product (245 mg) as colorless solids. 1H NMR (DMSO-d6 300 MHz TMS): δ 10.49 (1H, s), 8.43 (1H, d, J=9 Hz), 8.06 (1H, d, J=3 Hz), 8.01 (1H, dd, J=9 and 3 Hz), 7.82 (1H, d, J=6 Hz), 7.69 (1H, d, J=6 Hz), 7.47 (1H, d, J=9 Hz), 7.37 (1H, dd, J=9 and 3 Hz), 7.31 (1H, d, J=3 Hz) ppm; MS (ESI): m/z 316, [M+H+].

Provenance & Evidence