反应详情

温度

70 °C

In methanol (50 ml), 5-fluoro-2-methylphenyl isothiocyanate (2.00 g, 12.0 mmol) was added to methyl 4-amino-3-hydroxyphenylacetate (2.17 g, 12.0 mmol) at room temperature. After stirring for 27 hours, mercuric oxide (yellow) (3.12 g, 14.4 mmol) was added to the reaction mixture and the resulting mixture was heated at 70° C. for 4 hours. After cooling to room temperature, the reaction mixture was filtered through Celite. The filtrate was washed with methanol. The filtrate was distilled under reduced pressure to remove the solvent. The residue was purified by chromatography on a silica gel column, whereby from chloroform/ethyl acetate (10/1) eluate fractions, methyl (2-(5-fluoro-2-methylphenylamino)-6-benzoxazolyl)acetate (1.73 g, 46%) was obtained as a pale brown oil.

1. temperatureAfter cooling to room temperature
2. filtrationthe reaction mixture was filtered through Celite
3. washThe filtrate was washed with methanol
4. distillationThe filtrate was distilled under reduced pressure
5. customto remove the solvent
6. customThe residue was purified by chromatography on a silica gel column, whereby from chloroform/ethyl acetate (10/1) eluate fractions