反应详情

温度

45 °C

Methyl 2-thioxo-2,3-dihydrobenzo[d]oxazole-6-carboxylate (Example 92A, 470 mg, 2.25 mmol) and potassium hydroxide (1.26 g, 22.5 mmol) were combined in a 11.6 mL mixture of tetrahydrofuran, methanol, and water (10:1:1) and stirred at 45° C. for three hours. The reaction mixture was diluted with ethyl acetate, washed with a 1 N aqueous solution of hydrochloric acid, dried over sodium sulfate, and concentrated under reduced pressure to afford the title compound. MS (ESI−) m/z 193.8 (M−H)−.

1. washwashed with a 1 N aqueous solution of hydrochloric acid
2. dry with materialdried over sodium sulfate
3. concentrationconcentrated under reduced pressure