反应详情

温度

95 °C

A mixture of 2-bromo-4-methyl-thiazole-5-carboxylic acid ethyl ester (1.89 g, 7.57 mmol), phenol (855 mg, 9.09 mmol) and potassium carbonate (1.36 g, 9.84 mmol) in dimethylformamide (18 mL) was heated at 95° C. for 15 h before it was cooled to room temperature and partitioned between ethyl acetate and water, the organic layer was washed with water, aqueous sodium hydroxide (2×), brine, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel with a gradient of ethyl acetate and hexanes to give the title compound as a yellow oil (1.32 g): MS: (+) m/z 264.0 (M+1).

1. temperaturewas cooled to room temperature
2. custompartitioned between ethyl acetate and water
3. washthe organic layer was washed with water, aqueous sodium hydroxide (2×), brine
4. dry with materialdried over anhydrous sodium sulfate
5. concentrationconcentrated in vacuo
6. customThe residue was purified by flash column chromatography on silica gel with a gradient of ethyl acetate and hexanes