Sodium Hydroxide → HCID 67087716, compound

Participants

Reaction Steps

To a stirred solution of (E)-methyl 2-(3,4-dimethoxystyryl)benzo[d]oxazole-4-carboxylate (240 mg, 0.71 mmol) in THF (10 mL) and MeOH (5 mL) was added 2 N NaOH solution (1.77 mL) dropwise at room temperature. The resulting mixture was stirred at room temperature for two hours then quenched with a 1N HCl solution. The mixture was then extracted with DCM and the organic phase was washed with saturated aqueous NaCl solution and dried over sodium sulfate. The solvent was then removed under reduced pressure to give (E)-2-(3,4-Dimethoxystyryl)benzo[d]oxazole-4-carboxylic acid (170 mg, 74%). 1H-NMR (400 MHz, DMSO-d6) δ 3.81 (s, 3H), 3.85 (s, 3H), 7.03 (d, J=8.0 Hz, 1H), 7.33-7.39 (m, 2H), 7.46 (app t, J=8.0 Hz, 1H), 7.50 (d, J=2.0 Hz, 1H), 7.80 (d, J=16.0 Hz, 1H), 7.87 (dd, J=8.0, 1.2 Hz, 1H), 7.93 (dd, J=8.0, 1.2 Hz, 1H); LC-MS (ES-API): rt 8.88 min; m/z calculated for C18H15NO5 [M−H]− 324.1, found 324.1.

Provenance & Evidence