反应详情

温度

-30 °C

A stirred solution of 5-amino-1,3-dihydro-indol-2-one (3.5 g, 23.6 mmol, prepared according to U.S. Pat. No. 6,114,371) in 20 ml of tetrahydrofuran was added with triethylamine (1.3 ml, 9 mmol). The solution was cooled down to −30° C. in an acetone-dry ice bath and added with acetyl chloride (1.3 ml, 9 mmol) dropwise. Upon the completion of the addition, the resulting mixture was stirred for 20 minutes at room temperature and added with ethyl acetate (20 ml) until precipitate was formed. The solid was filtered, washed with water (50 ml×3) and dried in vacuo to give N-(2-oxo-2,3-dihydro-1H-indol-5-yl)-acetamide (4 g, 88.9%) as a white solid.

1. additionUpon the completion of the addition
2. customwas formed
3. filtrationThe solid was filtered
4. washwashed with water (50 ml×3)
5. customdried in vacuo