反应详情

To a solution of methyl 4-amino-2-benzamidothiazole-5-carboxylate (0.16 g, 0.57 mmol) in tetrahydrofuran (10 mL) and water (5 mL) was added lithium hydroxide monohydrate (0.007 g, 1.60 mmol). The reaction mixture was stirred at ambient temperature for 16 hours and adjusted to pH 5˜6 with 5% hydrochloric acid. The mixture was extracted with ethyl acetate (3×100 mL) and the combined organic extract was washed with brine, dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated to afford the title compound (0.14 g, 88%); MS (ES+) m/z 263.4 (M+1).

1. extractionThe mixture was extracted with ethyl acetate (3×100 mL)
2. extractionthe combined organic extract
3. washwas washed with brine
4. dry with materialdried over anhydrous sodium sulfate
5. filtrationfiltered
6. concentrationThe filtrate was concentrated